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Mobile Phone (mobile + phone)
Terms modified by Mobile Phone Selected AbstractsConfigurations of Relationships in Different Media: FtF, Email, Instant Messenger, Mobile Phone, and SMSJOURNAL OF COMPUTER-MEDIATED COMMUNICATION, Issue 4 2007Hyo Kim This study analyzes the configurations of communication relationships in Korea through face-to-face, email, instant messaging, mobile phone, and short message service media. Through a web survey, we asked respondents to identify (1) for each of the five media (2) up to five of their most frequent communication partners, (3) the partner's social role (including colleagues, family, friends), and (4) their own employment category. Individual-level and network-level analyses were used to compare variations in communication relationships and configurations of relationships among social roles overall, within each medium, and for different employment categories, and to identify configurations of relationships across media. IM, SMS, and mobile phone are distinctive media for students, mobile phone for homeworkers, and email for organizational workers. Moreover, mobile phones tend to be used in reinforcing strong social ties, and text-based CMC media tend to be used in expanding relationships with weak ties. Finally, face-to-face (FtF) seems to be a universal medium without significant differences across respondents' employment categories. [source] The role of impulsivity in actual and problematic use of the mobile phoneAPPLIED COGNITIVE PSYCHOLOGY, Issue 9 2008Joël Billieux Several authors have investigated the risks arising from the growth in mobile phone use (e.g. debts incurred by young people). The aims of the present study are (1) to validate a new questionnaire assessing problematic mobile phone use: the Problematic Mobile Phone Use Questionnaire (PMPUQ), and (2) to investigate the relationships between the PMPUQ and the multi-faceted construct of impulsivity. With these aims, 339 subjects were screened using the PMPUQ and the UPPS Impulsive Behaviour Scale (UPPS) which assesses four distinct components associated with impulsive behaviours (urgency, lack of premeditation, lack of perseverance and sensation seeking). The results showed that the PMPUQ has an acceptable fit and assesses four different dimensions of problematic mobile phone use (prohibited use, dangerous use, dependence, financial problems). While each facet of impulsivity played a specific role in mobile phones use, urgency appeared to be the strongest predictor of problematic use. Copyright © 2008 John Wiley & Sons, Ltd. [source] Alcohol and Cognitive Function: Assessment in Everyday Life and Laboratory Settings Using Mobile PhonesALCOHOLISM, Issue 12 2009Brian Tiplady Background:, Mobile phone (cellphone) technology makes it practicable to assess cognitive function in a natural setting. We assessed this method and compared impairment of performance due to alcohol in everyday life with measurements made in the laboratory. Methods:, Thirty-eight volunteers (20 male, aged 18,54 years) took part in the everyday study, completing assessments twice a day for 14 days following requests sent by text messages to the mobile phone. Twenty-six of them (12 male, aged 19,54) took part in a subsequent two-period crossover lab study comparing alcohol with no alcohol (placebo). Results:, Everyday entries with 5 or more units of alcohol consumed in the past 6 hours (inferred mean blood alcohol concentration 95 ml/100 ml) showed higher scores for errors in tests of attention and working memory compared with entries with no alcohol consumed that day. Response times were impaired for only 1 test, sustained attention to response. The laboratory comparison of alcohol (mean blood alcohol concentration 124 mg/100 ml) with placebo showed impairment to both reaction time and error scores for all tests. A similar degree of subjective drunkenness was reported in both settings. Conclusions:, We found that mobile phones allowed practical research on cognitive performance in an everyday life setting. Alcohol impaired function in both laboratory and everyday life settings at relevant doses of alcohol. [source] Understanding the potential role of mobile phone-based monitoring on asthma self-management: qualitative studyCLINICAL & EXPERIMENTAL ALLERGY, Issue 5 2007H. Pinnock Summary Background National and international healthcare policy increasingly seeks technological solutions to the challenge of providing care for people with long-term conditions. Novel technologies, however, have the potential to change the dynamics of disease monitoring and self-management. We aimed to explore the opinions and concerns of people with asthma and primary care clinicians on the potential role of mobile phone monitoring technology (transmitting symptoms and peak flows, with immediate feedback of control and reminder of appropriate actions) in supporting asthma self-management. Methods This qualitative study recruited 48 participants (34 adults and teenagers with asthma, 14 asthma nurses and doctors) from primary care in Lothian (Central Scotland) and Kent (South East England). Thirty-nine participated in six focus groups, which included a demonstration of the technology; nine gave in-depth interviews before and after a 4-week trial of the technology. Results Participants considered that mobile phone-based monitoring systems can facilitate guided self-management although, paradoxically, may engender dependence on professional/technological support. In the early phases, as patients are learning to accept, understand and control their asthma, this support was seen as providing much-needed confidence. During the maintenance phase, when self-management predominates, patient and professionals were concerned that increased dependence may be unhelpful, although they appreciated that maintaining an on-going record could facilitate consultations. Conclusion Mobile phone-based monitoring systems have the potential to support guided self-management by aiding transition from clinician-supported early phases to effective self-management during the maintenance phase. Continuing development, adoption and formal evaluation of these systems should take account of the insights provided by our data. [source] Mobile phones, communities and social networks among foreign workers in SingaporeGLOBAL NETWORKS, Issue 3 2009ERIC C. THOMPSON Abstract Transnational mobility affects both high-status and low-income workers, disrupting traditional assumptions of the boundedness of communities. There is a need to reconfigure our most basic theoretical and analytical constructs. In this article I engage in this task by illustrating a complex set of distinctions (as well as connections) between ,communities' as ideationally constituted through cultural practices and ,social networks' constituted through interaction and exchange. I have grounded the analysis ethnographically in the experiences of foreign workers in Singapore, focusing on domestic and construction workers from the Philippines, Indonesia, Thailand and Bangladesh. I examine the cultural, social and communicative role that mobile phones play in the lives of workers who are otherwise constrained in terms of mobility, living patterns and activities. Mobile phones are constituted as symbol status markers in relationship to foreign workers. Local representations construct foreign workers as users and consumers of mobile telephony, reinscribing ideas of transnational identities as well as foreignness within the context of Singapore. Migrant workers demonstrate a detailed knowledge of the various telephony options available, but the desire to use phones to communicate can overwhelm their self-control and lead to very high expenditures. The research highlights the constraints , as well as possibilities , individuals experience as subjects and agents within both social and cultural systems, and the ways in which those constraints and possibilities are mediated by a particular technology , in this case, mobile phones. [source] Mobile phones and Mipoho's prophecy: The powers and dangers of flying languageAMERICAN ETHNOLOGIST, Issue 2 2010JANET MCINTOSH ABSTRACT In this article, I examine the ideologies surrounding the poetic forms of Giriama text messaging in the town of Malindi, Kenya. I argue that young people use rapid code-switching and a global medialect of condensed, abbreviated English as an iconic index of a modern, mobile, self-fashioning, sexy, and irreverent persona, whereas their use of the local vernacular (Kigiriama) tends to reroot them in the gravitas of social obligations and respect relationships. In text messages, then, English and local African tongues are sometimes treated as foils for each other, suggesting that, rather than merely being mimicked, the English medialect is flavored by distinctly local concerns. Indeed, among many Giriama elders, the poetic patterns of text messaging are construed as a special breed of witchery in which hypermobility and linguistic innovation threaten ethnic coherence and even sanity itself. I suggest, however, that the use of Kigiriama in text messaging may point not to the abandonment of ethnicity but to new ways of being Giriama that are simultaneously local and modern. [mobile phones, text messaging, globalization, Kenya, witchcraft, language ideology, code switching] [source] A response to ,Mobile phones in the hospital , past, present and future', Klein A A and Djaiani G N, Anaesthesia 2003; 58: 353,7.ANAESTHESIA, Issue 8 2003J. A. Lack No abstract is available for this article. [source] Mobile phones in the hospital , past, present and futureANAESTHESIA, Issue 4 2003A. A. Klein Summary The phenomenon of electromagnetic interference by mobile phones is real and potentially clinically significant. This has been recognised by the Department of Health and the Medical Devices Agency, leading to bans on phone use in hospitals. Current evidence suggests that mobile phones can cause malfunction of medical equipment, but only when used in close proximity. Allowing phone use in non-patient care areas and improving staff education may improve compliance with hospital policies. [source] Mobile phones and children: Is precaution warranted?BIOELECTROMAGNETICS, Issue 5 2004Youri Grigoriev No abstract is available for this article. [source] Information technology supporting diabetes sel-care: a pilot studyEUROPEAN DIABETES NURSING, Issue 1 2007A Halkoaho MSc Diabetes Nurse Specialist Abstract Although diabetes is a lifelong, incurable disease, people can live a full and normal life, provided that they receive appropriate and well-planned care. The care of people with diabetes should be organised as flexibly as possible to suit individual lifestyles. Information technology has become a useful tool to support functional patient,professional relationships and improve care balance. The Self-Care System software tool set by ProWellness is one such tool. Users can enter blood glucose data by using a computer, modem and mobile phone and diabetes nurses can monitor the situation from their own computer and, if necessary, give instructions by sending a SMS (text) message to the patient's mobile phone. This pilot study investigated whether the Self-Care System application supports people with diabetes and can be used as a diabetes education method. The study was carried out in the municipal consortium for healthcare of Siilinjärvi and Maaninka. Nine individuals with diabetes and three diabetes nurses were selected to participate in the study. Data were collected by questionnaire and interview. People with diabetes were sent a questionnaire and the nurses were interviewed. Content analysis was carried out on the interview data. The results suggest that the Self-Care System software supports and motivates diabetes self-care. The nurses felt that the application was useful when changes, such as starting insulin treatment, were introduced. The application was further described as effective and motivating in short-term intensive diabetes education and monitoring; however, both nurses and patients disliked the mechanical nature of the software. Copyright © 2007 FEND. [source] The blessings and burdens of communication: cell phones in Jamaican transnational social fieldsGLOBAL NETWORKS, Issue 2 2006HEATHER A. HORST Tracing the shift from community phone boxes to individually owned mobile (cell) phones in rural Jamaica, in this article I focus on the integration of mobile phones in Jamaican transnational communication. Equipped with a mobile phone, rural Jamaicans no longer rely on collect phone calls and expensive calling cards to initiate the connections between their friends and relatives living abroad. For many Jamaicans without access to a regular or reliable phone service prior to 2001, the mobile phone is viewed as an unadulterated blessing, transforming the role of transnational communication from an intermittent event to a part of daily life. For others, however, the mobile phone remains an object of ambivalence, bringing unforeseen burdens and obligations. [source] Fabrication and Application of an Oxide Thermoelectric SystemINTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY, Issue 4 2007Ryoji Funahashi A plate-shaped thermoelectric module was prepared using 140 pairs of p -type Ca3Co4O9 (Co-349) and n -type LaNiO3 (Ni-113) bulks. The hot-pressed thermoelectric oxide bulks were connected with an Ag paste, incorporating oxide powder, and Ag sheets. The module's open-circuit voltage increases with increasing hot-side temperature (TH) and reaches 4.5 V at a TH of 1072 K in air. No deterioration in output power was seen when power generation was carried out 10 times at a TH of 723 K with intermediate cooling to room temperature. The module was successfully used to charge a lithium-ion battery in a mobile phone. Thermoelectric modules composed of p -type Co-349 and n -type CaMnO3 (Mn-113) bulks, which have a pipe shape, were constructed using Ag electrodes and stainless-steel tubes. The devices were connected with the stainless-steel tube coated with ZrO2 by thermal spray using a dielectric paste composed of silica glass and iron oxide. Power generation was carried out in flame by combustion of natural gas. Water flowed inside the stainless-steel tube for cooling. One module consisting of 54 pairs of legs can generate 1.5 V, 0.28 W, and steam simultaneously by installing in an instantaneous water heater. Power generation was carried out four times with intermediate cooling. Deterioration in the open-circuit voltage of the module was not observed after the fourth combustion. [source] Telemedicine and teledermatology: Past, present and futureJOURNAL DER DEUTSCHEN DERMATOLOGISCHEN GESELLSCHAFT, Issue 2 2008Elisabeth M.T. Wurm Summary Telemedicine is an emerging field within medicine with potential to revolutionize the delivery of health care. It is defined as the use of telecommunication technologies to transfer medical information.Teledermatology is a category of telemedicine. Early experiments were already made at the beginning of the 20th century, the breakthrough happened in the nineties because of the rapid progress of telecommunication technology. The latest advance is mobile telemedicine which is characterized by the use of mobile devices such as mobile phone and PDA (personal digital assistant).Advantages of telemedicine are the possibility of remote patient-care as well as the easy and fast access to expert opinions and education. This can either happen through exchange of previously stored data/images (store-and-forward method) or in real time. Since our society is increasingly becoming interconnected via technical advances, it is essential that medicine also has an objective understanding of the topic. [source] Development of a cross-platform ubiquitous language learning service via mobile phone and interactive television,JOURNAL OF COMPUTER ASSISTED LEARNING, Issue 4 2007S. Fallahkhair Abstract This paper describes the development processes for a cross-platform ubiquitous language learning service via interactive television (iTV) and mobile phone. Adapting a learner-centred design methodology, a number of requirements were gathered from multiple sources that were subsequently used in TAMALLE (television and mobile phone assisted language learning environment) development. A number of issues that arise in the context of cross-platform user interface design and architecture for ubiquitous language learning were tackled. Finally, we discuss a multi-method evaluation regime to gauge usability, perceived usefulness and desirability of TAMALLE system. The result broadly revealed an overall positive response from language learners. Although, there were some reported difficulties in reading text and on-screen display mainly on the iTV side of the interface, TAMALLE was perceived to be a usable, useful and desirable tool to support informal language learning and also for gaining new contextual and cultural knowledge. [source] The Internet for educating individuals with social impairmentsJOURNAL OF COMPUTER ASSISTED LEARNING, Issue 4 2003J. Bishop Abstract Social impairments materialise in a number of forms, from developmental disabilities such as autistic spectrum disorder, to psychiatric conditions such as social phobia. The individuals diagnosed with these problems find it difficult to deal with social situations through either the inability to perform in these situations or the fear of not being able to do so. The study investigated the social and practical implications of using Mobile Internet technology to deliver information relating to a social situation in real-time to participants with Autistic Spectrum Disorders (n = 10) and General Social Phobia (n = 3) diagnosed using DSM-IV. The participants used the agent on their mobile phone to convert phrases they found offensive or confusing into more concise and understandable definitions. Analysing their attitudes revealed that the technology enables socially impaired individuals to learn the meaning of emotions and understand more about how they communicate with their peers. However, the study concludes that governmental organisations, education providers and society as a whole need to adopt a cohesive approach to communication to ensure socially impaired individuals are fully included in society [source] Configurations of Relationships in Different Media: FtF, Email, Instant Messenger, Mobile Phone, and SMSJOURNAL OF COMPUTER-MEDIATED COMMUNICATION, Issue 4 2007Hyo Kim This study analyzes the configurations of communication relationships in Korea through face-to-face, email, instant messaging, mobile phone, and short message service media. Through a web survey, we asked respondents to identify (1) for each of the five media (2) up to five of their most frequent communication partners, (3) the partner's social role (including colleagues, family, friends), and (4) their own employment category. Individual-level and network-level analyses were used to compare variations in communication relationships and configurations of relationships among social roles overall, within each medium, and for different employment categories, and to identify configurations of relationships across media. IM, SMS, and mobile phone are distinctive media for students, mobile phone for homeworkers, and email for organizational workers. Moreover, mobile phones tend to be used in reinforcing strong social ties, and text-based CMC media tend to be used in expanding relationships with weak ties. Finally, face-to-face (FtF) seems to be a universal medium without significant differences across respondents' employment categories. [source] Alcohol and Cognitive Function: Assessment in Everyday Life and Laboratory Settings Using Mobile PhonesALCOHOLISM, Issue 12 2009Brian Tiplady Background:, Mobile phone (cellphone) technology makes it practicable to assess cognitive function in a natural setting. We assessed this method and compared impairment of performance due to alcohol in everyday life with measurements made in the laboratory. Methods:, Thirty-eight volunteers (20 male, aged 18,54 years) took part in the everyday study, completing assessments twice a day for 14 days following requests sent by text messages to the mobile phone. Twenty-six of them (12 male, aged 19,54) took part in a subsequent two-period crossover lab study comparing alcohol with no alcohol (placebo). Results:, Everyday entries with 5 or more units of alcohol consumed in the past 6 hours (inferred mean blood alcohol concentration 95 ml/100 ml) showed higher scores for errors in tests of attention and working memory compared with entries with no alcohol consumed that day. Response times were impaired for only 1 test, sustained attention to response. The laboratory comparison of alcohol (mean blood alcohol concentration 124 mg/100 ml) with placebo showed impairment to both reaction time and error scores for all tests. A similar degree of subjective drunkenness was reported in both settings. Conclusions:, We found that mobile phones allowed practical research on cognitive performance in an everyday life setting. Alcohol impaired function in both laboratory and everyday life settings at relevant doses of alcohol. [source] A new rapid home test for faecal calprotectin in ulcerative colitisALIMENTARY PHARMACOLOGY & THERAPEUTICS, Issue 2 2010M. ELKJAER Summary Background, Enzyme-linked immunosorbent assay (ELISA) is a time-consuming method for the measurement of faecal calprotectin. Two new quantitative rapid tests have been developed. Aim, To compare the new rapid tests with ELISA as ,Gold Standard'. Methods, Quantitative analysis involved the application of a sample onto the ,Lateral Flow Device'. The colour intensity of a test line was read using a laptop computer linked to a scanner (rapid test scanning). A picture taken with a mobile phone (HT photo) of the same ,Lateral Flow Device' was sent to a server via Mobile Internet and the result appeared on the phone screen after 15 s. Results, A total of 404 faecal samples were analysed. Mean differences of 1.7 mg/kg (range ,23.4,20.1) ELISA vs. rapid test scanning, 6.8 mg/kg (,28,14.5) ELISA vs. HT photo and 2.9 mg/kg (,10.3,4.5) rapid test scanning vs. HT photo were found with good agreement calculated using kappa statistic (86%, 87% and 95% respectively). The Coefficients of Variation for HT photo was <10%, with a sensitivity of 96.2% and a specificity of 90.1%. Conclusions, The new rapid tests are accurate and useful in clinical settings. Feasibility of the home test as part of disease control and self-management is currently being investigated. Aliment Pharmacol Ther,31, 323,330 [source] Internal WWAN antenna for the clamshell mobile phone with various chassis shapesMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 9 2010Kin-Lu Wong Abstract Stable performances of an internal WWAN antenna applied in the clamshell mobile phone with various chassis shapes are obtained. Six different states including five possible operating states and one closed state (idle condition) of the clamshell mobile phone, wherein the chassis shapes (main ground and upper ground) vary greatly, are studied. The WWAN antenna is mounted at the bottom of the main ground, and there are three connecting positions between the main ground and the upper ground. For each operating states, the upper ground is connected to the main ground at one of the three connecting positions. At each position, a band-stop circuit formed by two parallel LC chip elements is embedded, which is designed to excite a parallel resonance at around 900 MHz and hence leads to very high impedance seen into the upper ground in the 900 MHz band. This greatly decreases the excited surface currents on the upper ground, making the presence of the upper ground to have very small effects on the performances of the WWAN antenna mounted at the bottom of the main ground. At around 1900 MHz, owing to its shorter wavelength, the surface currents on the upper ground excited by the WWAN antenna on the main ground are small. Thus, over both the 900- and 1900-MHz bands, the various orientations of the upper ground to the main ground cause small effects on the WWAN antenna embedded therein. Details of the obtained results are presented. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2148,2154, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25413 [source] Small-size printed loop-type antenna integrated with two stacked coupled-fed shorted strip monopoles for eight-band LTE/GSM/UMTS operation in the mobile phoneMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 7 2010Kin-Lu Wong Abstract A small-size internal printed antenna formed by a loop-type antenna integrated with two stacked coupled-fed shorted strip monopoles is presented. The proposed antenna has a small uniplanar structure of 40 × 15 mm2 (600 mm2) for eight-band LTE/GSM/UMTS operation in the mobile phone. The loop-type antenna comprises a driven monopole and a coupled portion short-circuited to the system ground plane of the mobile phone; the driven monopole alone contributes a resonant mode for the antenna's upper band, whereas the driven monopole and shorted coupled portion together provide a loop-type resonant path to generate a resonant mode for the antenna's lower band. Two stacked strips are then integrated with the loop-type antenna, with the two strips coupled-fed by the driven monopole and short-circuited to the ground plane through the shorted coupled portion. That is, two stacked coupled-fed shorted strip monopoles are formed and incorporated with the loop-type antenna in an integrated configuration. The two strip monopoles contribute two additional resonant modes to incorporate those generated by the loop-type antenna to achieve the desired wide lower band (698,960 MHz) and upper band (1710,2690 MHz) for eight-band LTE/GSM/UMTS operation. Details of the proposed antenna are presented. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1471,1476, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25257 [source] Small-size coupled-fed shorted T-monopole for internal WWAN antenna in the thin-profile mobile phoneMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 2 2010Wei-Yu Chen Abstract A coupled-fed shorted T-monopole with a small size of 15× 26 mm2 (390 mm2) printed on the system circuit board of the mobile phone for WWAN operation is presented. By using a simple inverted-L feeding strip to capacitively excite the shorted T-monopole, two wide operating bands at about 900 and 1900 MHz, respectively, to cover GSM850/900 and GSM1800/1900/UMTS operations are obtained. The antenna is an all-printing structure, with no external matching circuit on the system circuit board or lumped circuit elements embedded in the antenna required for size reduction or bandwidth enhancement. The antenna is hence easy to fabricate at low cost and is especially suited for thin-profile mobile phone applications. The occupied area (less than 400 mm2) of the antenna printed on the system circuit board of the mobile phone in this study is among the smallest for the internal uniplanar printed antenna capable of penta-band WWAN operation that have been reported. Details of the proposed antenna are described, and the obtained results, including its SAR (specific absorption rate) study, are presented and discussed. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 257,262, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24907 [source] Simple small-size coupled-fed uniplanar PIFA for multiband clamshell mobile phone applicationMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 12 2009Ting-Wei Kang Abstract In this study, a simple uniplanar printed PIFA occupying a small area of 10 × 40 mm2 for achieving multiband operation in the clamshell mobile phone is presented. The proposed PIFA is formed by a simple shorted radiating strip coupled-fed by a simple feeding strip and is mounted at the hinge of the clamshell mobile phone; further, the upper ground plane is connected to the main ground plane using an extended connecting strip. With the coupling feed and the connection arrangement between the main and upper ground planes, the proposed PIFA itself is not only an efficient radiator, it can also excite the two ground planes of the clamshell mobile phone as an efficient radiator (dipole-like resonant modes are excited). Thus, with a small occupying area and a simple structure for the proposed PIFA, two wide operating bands at lower and higher frequencies can be provided to cover GSM850/900/1800/1900/UMTS bands for WWAN operation. The antenna also meets the 1-g SAR specification of 1.6 W/kg required for practical applications. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2805,2810, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24756 [source] Small-size wireless wide area network loop chip antenna for clamshell mobile phone with hearing-aid compatibilityMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 10 2009Wei-Yu Li Abstract A loop chip antenna with an FR4 chip base suitable for clamshell mobile phone application to achieve wireless wide area network operation and hearing-aid compatibility (HAC) is presented. The loop chip antenna is formed by a loop strip excited by a capacitively coupled feed, all printed on the surfaces of the FR4 chip base to achieve a small size of 1.35 cm3 only. Two resonant loop paths are provided by the antenna and each loop path can generate its 0.5, and 1.0, resonant modes with good impedance matching. The excited loop resonant modes are formed into two wide operating bands for the antenna to cover GSM850/900 and GSM1800/1900/UMTS operations for both the open (talk) and closed (idle) states of the clamshell mobile phone. Furthermore, the loop antenna also excites small surface currents on the two ground planes of the clamshell mobile phone. In this case, weak near-field EM fields in the vicinity of the mobile phone can be generated. Results show that the strengths of the near-field E-field and H-field fall in the M3 or M4 Category, making the clamshell mobile phone with the proposed antenna to be an HAC communication device. The obtained specific absorption rate values in 1-g and 10-g head tissues also meet the limit of 1.6 and 2.0 W/kg, respectively. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2327,2335, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24665 [source] Uniplanar coupled-fed printed PIFA for WWAN/WLAN operation in the mobile phoneMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 5 2009Cheng-Tse Lee Abstract A coupled-fed printed planar inverted-F antenna (PIFA) with a compact uniplanar structure for easy implementation in the mobile phone for WWAN/WLAN operation is presented. The printed PIFA occupies a small area of 10 × 60 mm2 and provides two wide operating bands (the lower and upper bands) at about 900 and 2000 MHz for covering GSM850/900/DCS/PCS/UMTS/WLAN six-band operation. The printed PIFA is formed by two coupled-fed PIFAs of different sizes, a longer radiating/coupling portion and a shorter radiating/coupling portion. Owing to the use of the coupling feed, both of the two portions can generate dual-resonance excitation, with the longer portion providing a wide lower band for GSM850/900 operation and the shorter portion providing a wide upper band for DCS/PCS/UMTS/WLAN operation. In addition, the lower and upper bands of the printed PIFA can generally be controlled separately by the longer and shorter portions, making it easy for fine tuning of the desired operating bands in practical applications. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1250,1257, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24298 [source] GSM850/900/1800/1900/UMTS coupled-fed planar ,/8-PIFA for internal mobile phone antennaMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 4 2009Chih-Hua Chang Abstract A coupled-fed planar PIFA (planar inverted-F antenna) operated in its one-eighth wavelength (,/8) mode, different from the traditional one-quarter wavelength (,/4) mode, as the fundamental mode for mobile phone application is presented. The proposed PIFA comprises two radiating strips, both of slightly different lengths and close to about ,/8 at 900 MHz. By incorporating the use of the coupling feed, a wide operating band formed by the two ,/8 modes is excited at about 900 MHz for the antenna to cover GSM850/900 operation. Two ,/4 modes are also generated at close frequencies to from a wide operating band centered at about 1950 MHz to cover GSM1800/1900/UMTS operation. The proposed antenna hence can cover GSM850/900/1800/1900/UMTS penta-band operation for application in the mobile phone. In addition, the antenna has a simple structure and can be printed on a thin FR4 substrate of size 1.6 × 7 × 40 mm3 as a surface-mountable chip antenna. Details of the proposed antenna are presented and discussed. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1091,1096, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24214 [source] Seven-band folded-loop chip antenna for WWAN/WLAN/WiMAX operation in the mobile phoneMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 2 2009Ming-Ren Hsu Abstract A chip antenna formed by using an FR4 chip base and a folded-loop metal pattern embedded therein for internal mobile phone antenna application is presented. The folded-loop metal pattern is embedded in two different layers inside the FR4 chip base to achieve a compact structure, and a coupling gap is introduced to successfully excite two wide operating bands at about 900 and 2000 MHz to cover GSM850/900/1800/1900/UMTS, 2.4-GHz WLAN, and 2.5-GHz WiMAX operations; that is, a seven-band internal mobile phone antenna for covering WWAN/WLAN/WiMAX operation is obtained. The proposed chip antenna also occupies a small volume of 4 × 5 × 40 mm3 (0.8 cm3) and shows a low profile of 5 mm when mounted on the system circuit board of the mobile phone, making it suitable for thin mobile phone applications. The proposed chip antenna is studied and tested. The SAR effect of the antenna is also analyzed in the study. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 543,549, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24063 [source] Capacitively FED hybrid monopole/slot chip antenna for 2.5/3.5/5.5 GHz WiMAX operation in the mobile phoneMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 10 2008Peng-Yu Lai Abstract In this study, a promising design of the capacitively fed hybrid monopole/slot chip antenna for the 2.5/3.5/5.5 GHz WiMAX (worldwide interoperability for microwave access) operation in the mobile phone is presented. The antenna is printed on a thin FR4 substrate of small size 5.2 × 16 mm2 as a surface-mount element to be placed at one corner of the system circuit board of the mobile phone. The antenna mainly comprises a resonant monopole patch, a resonant shorter slot, and a matching longer slot; the latter two slots are embedded within the monopole patch to achieve a compact integration. Two wide operating bands centered at about 3.3 and 5.5 GHz are generated through capacitive excitation of the resonant monopole patch and the shorter slot, while the matching longer slot helps to improve the impedance matching over the two operating bands. The lower band covers WiMAX operation in the 2.5 GHz (2500,2690 MHz) and 3.5 GHz (3300,3700 MHz) bands, while the upper band covers the 5.5 GHz (5250,5850 MHz) WiMAX operation. Details of the proposed hybrid monopole/slot chip antenna are presented. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2689,2694, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23777 [source] Six-band internal antenna for small-size mobile phoneMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 9 2008Wei-Yu Li Abstract A promising six-band internal antenna suitable for small-size mobile phone application is presented. The mobile phone considered in this study has a system ground plane of length 60 mm only, much less than that of the general mobile phones. For such small-size mobile phones, it is not easy for the embedded antenna to achieve a wide operating band at 900 MHz for GSM850/900 operation. The proposed antenna solved the problem with a reasonable occupied volume. The antenna mainly comprises three radiating elements of two longer monopoles and a shorter monopole, which are configured to occupy a volume of 3.6 cm3 only. The two longer monopoles incorporating an external parallel chip inductor lead to the successful excitation of a wide operating band for the antenna's lower band to cover GSM850/900 operation. Moreover, the three monopoles together contribute to the excitation of a very wide upper band to cover GSM1800/1900/UMTS/WLAN operation. That is, the antenna can perform six-band operation for WWAN and WLAN communications. The proposed antenna is studied in detail in this article. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2242,2247, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23659 [source] Internal hybrid loop/monopole slot antenna for quad-band operation in the mobile phoneMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 3 2008Chih-Hsien Wu Abstract A novel printed hybrid loop/monopole slot antenna for quad-band operation in the mobile phone is presented. The proposed hybrid antenna is composed of a meandered loop antenna and a monopole slot antenna, and can generate two wide operating bands centered at about 900 and 1900 MHz to cover GSM850/900/DCS/PCS operation. The hybrid antenna is easily fabricated by bending the meandered loop antenna at low cost, which is connected to and centered at the top edge of the system ground plane where a straight monopole slot is embedded. With quad-band operation obtained, the hybrid antenna, however, occupies a small volume of 5.5 × 6 × 60 mm3 or 1.98 cm3 only inside the mobile phone. A 50-, microstrip feedline is used to excite the meandered loop antenna and the monopole slot antenna in series. Detailed results and parametric studies of the proposed hybrid antenna are presented. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 795,801, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23201 [source] Wideband monopole antenna for DTV/GSM operation in the mobile phoneMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 3 2008Cheng-Tse Lee Abstract A wideband monopole antenna comprising a narrow radiating strip of length 120 mm and a simple internal matching portion for mobile phone application is presented. The monopole antenna can generate a wide operating band to cover the DTV reception in the UHF frequency band (470,862 MHz) and mobile communication in the GSM850/900 bands (824,894 MHz/890,960 MHz). The radiating strip is also promising to be retracted to be concealed inside the casing of the mobile phone when not in use. Details of the proposed antenna are described in the study. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 801,806, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23194 [source] | ||||||||||||||||||||||