Distributed-Element Reflectionless Bandstop Filter with a Broadband Impedance Matching

Jongheun Lee; Juseop Lee

doi:10.1109/LMWC.2020.2990986

Distributed-Element Reflectionless Bandstop Filter with a Broadband Impedance Matching

Jongheun Lee, Juseop Lee

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

18 Citations (Scopus)

Abstract

In this letter, we present a systematic design method for a reflectionless bandstop filter using distributed-element resonators. One unique feature of the presented filter structure is that it is capable of producing a broadband impedance matching at both ports with a flat passband. For verifying the design approach, a second-order Butterworth reflectionless bandstop filter centered at 2 GHz with fractional bandwidth of 8% has been designed, fabricated, and measured. The measurement shows that the return losses ( S_{11} and S_{22} ) are overall larger than 10 dB from DC to 3f_{0}.

Original language	English
Article number	9089216
Pages (from-to)	561-564
Number of pages	4
Journal	IEEE Microwave and Wireless Components Letters
Volume	30
Issue number	6
DOIs	https://doi.org/10.1109/LMWC.2020.2990986
Publication status	Published - 2020 Jun

Bibliographical note

Funding Information:
Manuscript received February 3, 2020; revised April 11, 2020; accepted April 23, 2020. Date of publication May 7, 2020; date of current version June 5, 2020. This work was supported by the National Research Foundation of Korea (NRF) through the Korea Government (MSIT) under Grant NRF-2018R1A2B6006095. (Corresponding author: Juseop Lee.) The authors are with the Department of Computer and Communications Engineering, Korea University, Seoul 02841, South Korea (e-mail: juseoplee@ gmail.com).

Publisher Copyright:
© 2001-2012 IEEE.

Keywords

Absorptive filter
reflectionless filter

ASJC Scopus subject areas

Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/LMWC.2020.2990986

Cite this

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abstract = "In this letter, we present a systematic design method for a reflectionless bandstop filter using distributed-element resonators. One unique feature of the presented filter structure is that it is capable of producing a broadband impedance matching at both ports with a flat passband. For verifying the design approach, a second-order Butterworth reflectionless bandstop filter centered at 2 GHz with fractional bandwidth of 8% has been designed, fabricated, and measured. The measurement shows that the return losses ( S_{11} and S_{22} ) are overall larger than 10 dB from DC to 3f_{0}.",

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AB - In this letter, we present a systematic design method for a reflectionless bandstop filter using distributed-element resonators. One unique feature of the presented filter structure is that it is capable of producing a broadband impedance matching at both ports with a flat passband. For verifying the design approach, a second-order Butterworth reflectionless bandstop filter centered at 2 GHz with fractional bandwidth of 8% has been designed, fabricated, and measured. The measurement shows that the return losses ( S_{11} and S_{22} ) are overall larger than 10 dB from DC to 3f_{0}.

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Distributed-Element Reflectionless Bandstop Filter with a Broadband Impedance Matching

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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