Topology and Rigorous Design Method for Reflectionless Bandstop Filter

Jongheun Lee; Boyoung Lee; Seunggoo Nam; Juseop Lee

doi:10.23919/EuMC.2019.8910927

Topology and Rigorous Design Method for Reflectionless Bandstop Filter

Jongheun Lee, Boyoung Lee, Seunggoo Nam, Juseop Lee

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

1 Citation (Scopus)

Abstract

A new filter topology for a second-order absorptive bandstop filter with Butterworth response is presented in this paper. Closed-form design equations for having a Butterworth transmission response and no reflection at all frequencies are also provided. Hence, an absorptive bandstop filter can be designed such that its transmission response is identical to the one of a conventional reflective filter. For verifying the presented filter topology and design formulas, an absorptive bandstop filter with 10% fractional bandwidth centered at 190 MHz has been designed, fabricated, and measured. The measurement shows that the fabricated filter has the return loss larger than 15 dB in the stopband and the Butterworth response in the power transmission.

Original language	English
Title of host publication	2019 49th European Microwave Conference, EuMC 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	456-459
Number of pages	4
ISBN (Electronic)	9782874870552
DOIs	https://doi.org/10.23919/EuMC.2019.8910927
Publication status	Published - 2019 Oct
Event	49th European Microwave Conference, EuMC 2019 - Paris, France Duration: 2019 Oct 1 → 2019 Oct 3

Publication series

Name	2019 49th European Microwave Conference, EuMC 2019

Conference

Conference	49th European Microwave Conference, EuMC 2019
Country	France
City	Paris
Period	19/10/1 → 19/10/3

Keywords

absorptive bandstop filter
Butterworth filter
infinite return loss

ASJC Scopus subject areas

Computer Networks and Communications
Instrumentation

Access to Document

10.23919/EuMC.2019.8910927

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Cite this

Lee, J., Lee, B., Nam, S., & Lee, J. (2019). Topology and Rigorous Design Method for Reflectionless Bandstop Filter. In 2019 49th European Microwave Conference, EuMC 2019 (pp. 456-459). [8910927] (2019 49th European Microwave Conference, EuMC 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/EuMC.2019.8910927

Topology and Rigorous Design Method for Reflectionless Bandstop Filter. / Lee, Jongheun; Lee, Boyoung; Nam, Seunggoo; Lee, Juseop.

2019 49th European Microwave Conference, EuMC 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 456-459 8910927 (2019 49th European Microwave Conference, EuMC 2019).

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

Lee, J, Lee, B, Nam, S & Lee, J 2019, Topology and Rigorous Design Method for Reflectionless Bandstop Filter. in 2019 49th European Microwave Conference, EuMC 2019., 8910927, 2019 49th European Microwave Conference, EuMC 2019, Institute of Electrical and Electronics Engineers Inc., pp. 456-459, 49th European Microwave Conference, EuMC 2019, Paris, France, 19/10/1. https://doi.org/10.23919/EuMC.2019.8910927

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abstract = "A new filter topology for a second-order absorptive bandstop filter with Butterworth response is presented in this paper. Closed-form design equations for having a Butterworth transmission response and no reflection at all frequencies are also provided. Hence, an absorptive bandstop filter can be designed such that its transmission response is identical to the one of a conventional reflective filter. For verifying the presented filter topology and design formulas, an absorptive bandstop filter with 10% fractional bandwidth centered at 190 MHz has been designed, fabricated, and measured. The measurement shows that the fabricated filter has the return loss larger than 15 dB in the stopband and the Butterworth response in the power transmission.",

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