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Circular Patch Antenna (circular + patch_antenna)

Distribution by Scientific Domains
Engineering100%

Selected Abstracts

Edge feeding of circular patch microstrip antennas

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 2 2001
B. S. Rao
Abstract Edge feeding of a circular patch antenna by a microstrip line has been achieved by utilizing the circumferential variation of the field which is fixed by loading the patch. However, loading splits the degenerate modes and gives rise to cross-polarization. Three different techniques are presented to analyze the loaded circular patch antenna. Comparison with the measured results for input impedance and radiation patterns shows good agreement. The concept used here is very general and can be applied to the edge feeding of any ring antenna. © 2001 John Wiley & Sons, Inc. Int J RF and Microwave CAE 11: 74,85, 2001. [source]

Dual-band N-shaped patch antenna loaded by lumped elements

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 11 2009
Asmaa H. Moustafa
Abstract This article presents a dual-band circular N-shaped microstrip patch antenna loaded by a shorting pin and lumped R-C circuit, hence a resonant R-L-C circuit is introduced. Loading by shorting pin excites the zero fundamental mode of the circular patch antenna (TM010), and it shifts the first fundamental mode (TM110) to higher one. N-shaped microstrip patch antenna is used as a modified circular microstrip patch antenna with reduced size. The proposed antenna is designed and fabricated on two-layered substrate. A comprehensive parametric study has been carried out on values of R and C to optimize the antenna performance. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2534,2537, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24673 [source]

Bulk and patch ferrite resonator antennas based on the ceramic matrix composite: GdIGx YIG1- x

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 6 2009
P. B. A. Fechine
Abstract In this study, the dielectric properties of the GdIGXYIG1,X ferrite composite material at radio frequency (RF) and microwave frequency bands were studied. These measurements were carried out in different sample geometries: thick films and cylindrical ceramic bulk ferrite resonator. In the RF range, we observed that the material is rather stable because of its short changes as a function of temperature and frequency range. The temperature capacitance coefficient values for all the samples (thick films and cylindrical ceramic bulk samples) presented short positive values at the RF range. The GdIG0.5YIG0.5 thick film was used as a substrate for the microstrip antenna device, where the upper Ag electrode served as a circular patch antenna and a microstrip line was used as a feed line. The microstrip antenna operates in this configuration at 8.185 GHz. In the study of the dielectric properties of the composites antenna geometry, with the same ferrite composite, a bulk cylindrical geometry was investigated. A numerical study, together with the experimental, was done, and the dielectric characteristics of the composite like ,r, tg,E, and ,r were obtained. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1595,1602, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24395 [source]