Bandpass-bandstop filter cascade performance over wide frequency tuning ranges

Eric J. Naglich; Juseop Lee; Dimitrios Peroulis; William J. Chappell

doi:10.1109/TMTT.2010.2084587

Bandpass-bandstop filter cascade performance over wide frequency tuning ranges

Eric J. Naglich, Juseop Lee, Dimitrios Peroulis, William J. Chappell

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

43 Citations (Scopus)

Abstract

A tunable, substrate integrated, high Q bandpass-bandstop filter cascade is demonstrated that is capable of providing up to 100 dB of isolation between two dynamically selectable frequencies of interest. Evanescent-mode cavity filters are used in the cascade to allow high quality factors and wide tuning ranges. It is shown that it is theoretically possible to tune the cascade circuit's passband and transmission nulls independently over more than an octave in frequency while displaying good performance. General coupling matrix theory, ABCD matrix theory, and measurements are shown that describe the behavior of the filter cascade over the entire frequency tuning range. The high, dynamic isolation provided by cascade circuits has potential to be useful in concurrent transmit-receive systems, shared aperture systems, and spectral environments with strong co-site interference.

Original language	English
Article number	5624621
Pages (from-to)	3945-3953
Number of pages	9
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	58
Issue number	12 PART 2
DOIs	https://doi.org/10.1109/TMTT.2010.2084587
Publication status	Published - 2010 Dec
Externally published	Yes

Bibliographical note

Funding Information:
Manuscript received June 30, 2010; revised September 17, 2010; accepted September 22, 2010. Date of publication November 09, 2010; date of current version December 10, 2010. This work was supported by the Defense Advanced Research Projects Agency Analog Spectral Processors Grant under program manager Sanjay Raman. This paper is an expanded paper from the IEEE MTT-S International Microwave Symposium, Anaheim, CA, May 23–28, 2010.

Keywords

Filters
microwave filters
passive filters
tunable filters
tunable resonators

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TMTT.2010.2084587

Cite this

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title = "Bandpass-bandstop filter cascade performance over wide frequency tuning ranges",

abstract = "A tunable, substrate integrated, high Q bandpass-bandstop filter cascade is demonstrated that is capable of providing up to 100 dB of isolation between two dynamically selectable frequencies of interest. Evanescent-mode cavity filters are used in the cascade to allow high quality factors and wide tuning ranges. It is shown that it is theoretically possible to tune the cascade circuit's passband and transmission nulls independently over more than an octave in frequency while displaying good performance. General coupling matrix theory, ABCD matrix theory, and measurements are shown that describe the behavior of the filter cascade over the entire frequency tuning range. The high, dynamic isolation provided by cascade circuits has potential to be useful in concurrent transmit-receive systems, shared aperture systems, and spectral environments with strong co-site interference.",

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AU - Lee, Juseop

AU - Peroulis, Dimitrios

AU - Chappell, William J.

N1 - Funding Information: Manuscript received June 30, 2010; revised September 17, 2010; accepted September 22, 2010. Date of publication November 09, 2010; date of current version December 10, 2010. This work was supported by the Defense Advanced Research Projects Agency Analog Spectral Processors Grant under program manager Sanjay Raman. This paper is an expanded paper from the IEEE MTT-S International Microwave Symposium, Anaheim, CA, May 23–28, 2010.

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N2 - A tunable, substrate integrated, high Q bandpass-bandstop filter cascade is demonstrated that is capable of providing up to 100 dB of isolation between two dynamically selectable frequencies of interest. Evanescent-mode cavity filters are used in the cascade to allow high quality factors and wide tuning ranges. It is shown that it is theoretically possible to tune the cascade circuit's passband and transmission nulls independently over more than an octave in frequency while displaying good performance. General coupling matrix theory, ABCD matrix theory, and measurements are shown that describe the behavior of the filter cascade over the entire frequency tuning range. The high, dynamic isolation provided by cascade circuits has potential to be useful in concurrent transmit-receive systems, shared aperture systems, and spectral environments with strong co-site interference.

AB - A tunable, substrate integrated, high Q bandpass-bandstop filter cascade is demonstrated that is capable of providing up to 100 dB of isolation between two dynamically selectable frequencies of interest. Evanescent-mode cavity filters are used in the cascade to allow high quality factors and wide tuning ranges. It is shown that it is theoretically possible to tune the cascade circuit's passband and transmission nulls independently over more than an octave in frequency while displaying good performance. General coupling matrix theory, ABCD matrix theory, and measurements are shown that describe the behavior of the filter cascade over the entire frequency tuning range. The high, dynamic isolation provided by cascade circuits has potential to be useful in concurrent transmit-receive systems, shared aperture systems, and spectral environments with strong co-site interference.

KW - Filters

KW - microwave filters

KW - passive filters

KW - tunable filters

KW - tunable resonators

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Bandpass-bandstop filter cascade performance over wide frequency tuning ranges

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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