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Band Pass Filter (band + pass_filter)
Selected AbstractsThe Band Pass Filter*INTERNATIONAL ECONOMIC REVIEW, Issue 2 2003Lawrence J. Christiano We develop optimal finite-sample approximations for the band pass filter. These approximations include one-sided filters that can be used in real time. Optimal approximations depend upon the details of the time series representation that generates the data. Fortunately, for U.S. macroeconomic data, getting the details exactly right is not crucial. A simple approach, based on the generally false assumption that the data are generated by a random walk, is nearly optimal. We use the tools discussed here to document a new fact: There has been a significant shift in the money,inflation relationship before and after 1960. [source] Performance evaluation of Gunn oscillators for active mode-locking of erbium doped fiber ring lasersMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 10 2008Deepa Venkitesh Abstract A cost-effective and rugged actively mode-locked erbium-doped fiber laser operated at GHz repetition rate is demonstrated with the use of a Gunn oscillator as the RF source for driving the optical modulator. The high power from the Gunn oscillator eliminates the need of an RF driver. The output of the laser in the time domain is processed numerically to predict its modal characteristics in the spectral domain. Experimental results regarding the evaluation of the Gunn oscillator for its suitability in active mode-locking, tunable operation of the laser in the C -band using a band pass filter as well as the results on the stability of the laser output in the time and frequency domain are presented. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2684,2688, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23778 [source] A novel investigation on size reduction of a frequency selective surfaceMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 11 2007M. K. Pain Abstract The study presents theoretical and experimental investigation of a novel, reduced size Microstrip Frequency Selective Surface. The novel design is achieved by cutting some rectangular slots at four sides of a square patch. Compared with conventional square patch Frequency Selective Surface (FSS), this slotted square patch Microstrip FSS can achieve reduction in patch area of 36%. The structure acts like a band pass filter with a resonant frequency 8 GHz. Both theoretical and experimental investigations are done. Theoretical investigation is done by IE3D software. Experimental investigation is performed using standard microwave test bench. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2820,2821, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22833 [source] A new equivalent circuit for inverters and its application for the determination of coupling matrix elements of narrow RF bandpass filtersINTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 1 2010M. K. Haldar Abstract A new equivalent circuit for inverters is presented. Using this circuit, expression for the elements of the coupling matrix of narrow RF band pass filters is derived. The derivation is based on frequency independent coupling assumed in the synthesis of narrow RF band pass filters. Our expression is different from an earlier expression obtained using lumped circuit representations of different types of coupling and their analysis. It is shown that the earlier expression can be derived from our analysis if the coupling is assumed frequency-variant. Unlike earlier work, our derivation shows how the sign of the coupling coefficient can be obtained. © 2009 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2010. [source] | ||||||||||