A Tunable Microstrip Bandpass Filter with Two Concurrently Tuned Transmission Zeros

Mirosław Magnuski; Dariusz Wójcik; Maciej Surma; Artur Noga

doi:10.3390/electronics11050807

A Tunable Microstrip Bandpass Filter with Two Concurrently Tuned Transmission Zeros

Department of Electronics; Electrical Engineering and Microelectronics (RAU/RAU11)

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

In this paper, an electrically small tunable microstrip bandpass filter with two concurrently tuned transmission zeros (TZs) is presented. The filter consists of two coupled resonators and varactors as tuning elements. An application of a multipath coupling network results in TZs on both sides of the passband. The filter controlled by a single voltage has a wide tuning range from 370 MHz to 800 MHz and a low insertion loss ranging from 1.9 dB to 3.4 dB. To achieve high attenuation in the stopband, two sections of the designed filter were cascaded. Both one-section and two-section filters were validated by measurements. The obtained results are in a very good agreement with simulations.

Original language	English
Article number	807
Journal	Electronics (Switzerland)
Volume	11
Issue number	5
DOIs	https://doi.org/10.3390/electronics11050807
Publication status	Published - 1 Mar 2022

Keywords

Constant fractional bandwidth
Microstrip technology
Single control voltage
Tunable bandpass filter

ASJC Scopus subject areas

Control and Systems Engineering
Signal Processing
Hardware and Architecture
Computer Networks and Communications
Electrical and Electronic Engineering

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10.3390/electronics11050807

Cite this

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title = "A Tunable Microstrip Bandpass Filter with Two Concurrently Tuned Transmission Zeros",

abstract = "In this paper, an electrically small tunable microstrip bandpass filter with two concurrently tuned transmission zeros (TZs) is presented. The filter consists of two coupled resonators and varactors as tuning elements. An application of a multipath coupling network results in TZs on both sides of the passband. The filter controlled by a single voltage has a wide tuning range from 370 MHz to 800 MHz and a low insertion loss ranging from 1.9 dB to 3.4 dB. To achieve high attenuation in the stopband, two sections of the designed filter were cascaded. Both one-section and two-section filters were validated by measurements. The obtained results are in a very good agreement with simulations.",

keywords = "Constant fractional bandwidth, Microstrip technology, Single control voltage, Tunable bandpass filter",

author = "Miros{\l}aw Magnuski and Dariusz W{\'o}jcik and Maciej Surma and Artur Noga",

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AU - Magnuski, Mirosław

AU - Wójcik, Dariusz

AU - Surma, Maciej

AU - Noga, Artur

PY - 2022/3/1

Y1 - 2022/3/1

N2 - In this paper, an electrically small tunable microstrip bandpass filter with two concurrently tuned transmission zeros (TZs) is presented. The filter consists of two coupled resonators and varactors as tuning elements. An application of a multipath coupling network results in TZs on both sides of the passband. The filter controlled by a single voltage has a wide tuning range from 370 MHz to 800 MHz and a low insertion loss ranging from 1.9 dB to 3.4 dB. To achieve high attenuation in the stopband, two sections of the designed filter were cascaded. Both one-section and two-section filters were validated by measurements. The obtained results are in a very good agreement with simulations.

AB - In this paper, an electrically small tunable microstrip bandpass filter with two concurrently tuned transmission zeros (TZs) is presented. The filter consists of two coupled resonators and varactors as tuning elements. An application of a multipath coupling network results in TZs on both sides of the passband. The filter controlled by a single voltage has a wide tuning range from 370 MHz to 800 MHz and a low insertion loss ranging from 1.9 dB to 3.4 dB. To achieve high attenuation in the stopband, two sections of the designed filter were cascaded. Both one-section and two-section filters were validated by measurements. The obtained results are in a very good agreement with simulations.

KW - Constant fractional bandwidth

KW - Microstrip technology

KW - Single control voltage

KW - Tunable bandpass filter

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JF - Electronics (Switzerland)

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ER -

A Tunable Microstrip Bandpass Filter with Two Concurrently Tuned Transmission Zeros

Abstract

Keywords

ASJC Scopus subject areas

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