Tunability of commonly used coupled-line bandpass filter topologies

Elmine Botes; Petrie Meyer

doi:10.1109/COMITE.2015.7120221

Tunability of commonly used coupled-line bandpass filter topologies

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

This work presents a study on the tunability of popular coupled-line filter topologies. The study considers a Chebychev prototype and transforms it to commonly used coupled-line topologies, namely the staircase, interdigital, hairpin, and combline topologies. The filters are designed for X-band frequencies with a 10 GHz centre frequency and a 5 % bandwidth, and are modelled using ideal transmission lines in a circuit simulator. The study is focused on centre frequency tunability while maintaining a constant bandwidth and out-of-band attenuation. It is shown that the classical staircase topology offers the best balance between good centre frequency tunability and out-of-band attenuation in comparison with the hairpin, interdigital and combline filters.

Original language	English
Title of host publication	2015 Conference on Microwave Techniques (COMITE)
Publisher	Institute of Electrical and Electronics Engineers
Number of pages	4
ISBN (Electronic)	978-1-4799-8123-6
ISBN (Print)	978-1-4799-8121-2
DOIs	https://doi.org/10.1109/COMITE.2015.7120221
Publication status	Published - 9 Jun 2015
Externally published	Yes
Event	14th Conference on Microwave Techniques, COMITE 2015 - Pardubice, Czech Republic Duration: 22 Apr 2015 → 23 Apr 2015

Conference

Conference	14th Conference on Microwave Techniques, COMITE 2015
Country/Territory	Czech Republic
City	Pardubice
Period	22/04/15 → 23/04/15

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10.1109/COMITE.2015.7120221

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title = "Tunability of commonly used coupled-line bandpass filter topologies",

abstract = "This work presents a study on the tunability of popular coupled-line filter topologies. The study considers a Chebychev prototype and transforms it to commonly used coupled-line topologies, namely the staircase, interdigital, hairpin, and combline topologies. The filters are designed for X-band frequencies with a 10 GHz centre frequency and a 5 % bandwidth, and are modelled using ideal transmission lines in a circuit simulator. The study is focused on centre frequency tunability while maintaining a constant bandwidth and out-of-band attenuation. It is shown that the classical staircase topology offers the best balance between good centre frequency tunability and out-of-band attenuation in comparison with the hairpin, interdigital and combline filters.",

author = "Elmine Botes and Petrie Meyer",

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AU - Meyer, Petrie

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N2 - This work presents a study on the tunability of popular coupled-line filter topologies. The study considers a Chebychev prototype and transforms it to commonly used coupled-line topologies, namely the staircase, interdigital, hairpin, and combline topologies. The filters are designed for X-band frequencies with a 10 GHz centre frequency and a 5 % bandwidth, and are modelled using ideal transmission lines in a circuit simulator. The study is focused on centre frequency tunability while maintaining a constant bandwidth and out-of-band attenuation. It is shown that the classical staircase topology offers the best balance between good centre frequency tunability and out-of-band attenuation in comparison with the hairpin, interdigital and combline filters.

AB - This work presents a study on the tunability of popular coupled-line filter topologies. The study considers a Chebychev prototype and transforms it to commonly used coupled-line topologies, namely the staircase, interdigital, hairpin, and combline topologies. The filters are designed for X-band frequencies with a 10 GHz centre frequency and a 5 % bandwidth, and are modelled using ideal transmission lines in a circuit simulator. The study is focused on centre frequency tunability while maintaining a constant bandwidth and out-of-band attenuation. It is shown that the classical staircase topology offers the best balance between good centre frequency tunability and out-of-band attenuation in comparison with the hairpin, interdigital and combline filters.

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M3 - Conference contribution

AN - SCOPUS:84938704300

SN - 978-1-4799-8121-2

BT - 2015 Conference on Microwave Techniques (COMITE)

PB - Institute of Electrical and Electronics Engineers

T2 - 14th Conference on Microwave Techniques, COMITE 2015

Y2 - 22 April 2015 through 23 April 2015

ER -

Tunability of commonly used coupled-line bandpass filter topologies

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