Broadband implementation of tunable, substrate-integrated, evanescent-mode, cavity bandpass filters

Shahrokh Saeedi; Ju Seop Lee; Hjalti Sigmarsson

doi:10.1109/EuMC.2014.6986568

Broadband implementation of tunable, substrate-integrated, evanescent-mode, cavity bandpass filters

Shahrokh Saeedi, Ju Seop Lee, Hjalti Sigmarsson

Division of Computer and Communication Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

A novel structure for implementing broadband external and internal coupling in heavily loaded, substrate integrated, evanescent-mode, cavity filters is presented. The proposed structure is based on adding electric field coupling to the magnetic field iris coupling, which is commonly used for such cavities. It is shown that fractional bandwidth on the order of 40% can be achieved using this new structure. As an illustration, a second order Butterworth filter is designed using the presented coupling method and then fabricated inside a two-layer RF circuit board. The measured and simulated filter results are shown to be in good agreement, with measured insertion loss of around 0.4 dB including connector losses. Finally, the filter is continuously tuned from 2910 MHz to 3795 MHz.

Original language	English
Title of host publication	European Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	849-852
Number of pages	4
ISBN (Print)	9782874870354
DOIs	https://doi.org/10.1109/EuMC.2014.6986568
Publication status	Published - 2014 Dec 15
Event	2014 44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014 - Rome, Italy Duration: 2014 Oct 6 → 2014 Oct 9

Other

Other	2014 44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014
Country	Italy
City	Rome
Period	14/10/6 → 14/10/9

Keywords

band-pass filters
evanescent-mode filters
Filters
microwave filters
tunable filters
wideband filters

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1109/EuMC.2014.6986568

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Cite this

Saeedi, S., Lee, J. S., & Sigmarsson, H. (2014). Broadband implementation of tunable, substrate-integrated, evanescent-mode, cavity bandpass filters. In European Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference (pp. 849-852). [6986568] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EuMC.2014.6986568

Broadband implementation of tunable, substrate-integrated, evanescent-mode, cavity bandpass filters. / Saeedi, Shahrokh; Lee, Ju Seop; Sigmarsson, Hjalti.

European Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference. Institute of Electrical and Electronics Engineers Inc., 2014. p. 849-852 6986568.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Saeedi, S, Lee, JS & Sigmarsson, H 2014, Broadband implementation of tunable, substrate-integrated, evanescent-mode, cavity bandpass filters. in European Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference., 6986568, Institute of Electrical and Electronics Engineers Inc., pp. 849-852, 2014 44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014, Rome, Italy, 14/10/6. https://doi.org/10.1109/EuMC.2014.6986568

Saeedi S, Lee JS, Sigmarsson H. Broadband implementation of tunable, substrate-integrated, evanescent-mode, cavity bandpass filters. In European Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference. Institute of Electrical and Electronics Engineers Inc. 2014. p. 849-852. 6986568 https://doi.org/10.1109/EuMC.2014.6986568

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abstract = "A novel structure for implementing broadband external and internal coupling in heavily loaded, substrate integrated, evanescent-mode, cavity filters is presented. The proposed structure is based on adding electric field coupling to the magnetic field iris coupling, which is commonly used for such cavities. It is shown that fractional bandwidth on the order of 40% can be achieved using this new structure. As an illustration, a second order Butterworth filter is designed using the presented coupling method and then fabricated inside a two-layer RF circuit board. The measured and simulated filter results are shown to be in good agreement, with measured insertion loss of around 0.4 dB including connector losses. Finally, the filter is continuously tuned from 2910 MHz to 3795 MHz.",

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