Varactor-tuned, active microwave band-pass filter

Chi-Yang Chang; Tatsuo Itoh

doi:10.1109/MWSYM.1990.99628

Varactor-tuned, active microwave band-pass filter

Chi-Yang Chang^*, Tatsuo Itoh

^*Corresponding author for this work

Institute of Communications Engineering

Research output: Contribution to journal › Conference article › peer-review

18 Scopus citations

Abstract

A microwave tunable high-Q active bandpass filter was developed using a varactor diode for tuning and a MESFET to provide negative resistance for increasing the tank circuit Q-value. Tuning ranges of 500 MHz for the one-pole filter and 430 MHz for the two-pole filter were achieved with a center frequency of 10 GHz. A 3-dB bandwidth of 20 MHz for the one-pole filter and 80 MHz for the two-pole filter was obtained. The passband insertion loss is typically 0 ± 1 dB.

Original language	English
Pages (from-to)	499-502
Number of pages	4
Journal	IEEE MTT-S International Microwave Symposium Digest
Volume	1
DOIs	https://doi.org/10.1109/MWSYM.1990.99628
State	Published - 1 Jan 1990
Event	1990 IEEE MTT-S International Microwave Symposium Digest Part 1 (of 3) - Dallas, TX, USA Duration: 8 May 1990 → 10 May 1990

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10.1109/MWSYM.1990.99628

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abstract = "A microwave tunable high-Q active bandpass filter was developed using a varactor diode for tuning and a MESFET to provide negative resistance for increasing the tank circuit Q-value. Tuning ranges of 500 MHz for the one-pole filter and 430 MHz for the two-pole filter were achieved with a center frequency of 10 GHz. A 3-dB bandwidth of 20 MHz for the one-pole filter and 80 MHz for the two-pole filter was obtained. The passband insertion loss is typically 0 ± 1 dB.",

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AB - A microwave tunable high-Q active bandpass filter was developed using a varactor diode for tuning and a MESFET to provide negative resistance for increasing the tank circuit Q-value. Tuning ranges of 500 MHz for the one-pole filter and 430 MHz for the two-pole filter were achieved with a center frequency of 10 GHz. A 3-dB bandwidth of 20 MHz for the one-pole filter and 80 MHz for the two-pole filter was obtained. The passband insertion loss is typically 0 ± 1 dB.

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AN - SCOPUS:0025106645

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JO - IEEE MTT-S International Microwave Symposium Digest

JF - IEEE MTT-S International Microwave Symposium Digest

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Varactor-tuned, active microwave band-pass filter

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