NDLI: Tunable 1.55 - 2.1 GHz 4-Pole Elliptic Bandpass Filter With Bandwidth Control and <formula formulatype=inline><tex Notation=TeX>${> 50}~{hbox {dB}}$</tex></formula> Rejection for Wireless Systems

Content Provider	IEEE Xplore Digital Library
Author	Yi-Chyun Chiou Rebeiz, G.M.
Copyright Year	1963
Abstract	This paper presents a four-pole elliptic tunable combline bandpass filter with center frequency and bandwidth control. The filter is built on a Duroid substrate with εr=10.2 and h=25 mils, and the tuning is done using packaged Schottky diodes. A frequency range of 1.55-2.1 GHz with a 1-dB bandwidth tuning from 40-120 MHz (2.2-8% fractional bandwidth) is demonstrated. A pair of tunable transmission zeroes are synthesized at both passband edges and significantly improve the filter selectivity. The rejection level at both the lower and upper stopbands is >; 50 dB and no spurious response exists close to the passband. The measured third-order intermodulation intercept point (TOI) and 1-dB power compression point at midband (1.85 GHz) and a bandwidth of 110 MHz are >; 14& dBm and 6 dBm, respectively, and are limited by the Schottky diodes. It is believed that this is the first four-pole combline tunable bandpass filter with an elliptic function response and center frequency and bandwidth control. The application areas are in tunable filters for wireless systems and cognitive radios.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	117
Ending Page	124
Page Count	8
File Size	1843831
File Format	PDF
ISSN	00189480
Volume Number	61
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bandwidth Filtering theory Couplings Passband Resonant frequency Tuning Band pass filters tunable filter Bandwidth tunable filter combline filter elliptic
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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