Balanced Symmetrical Quasi-Reflectionless Single-and Dual-Band Bandpass Planar Filters

Roberto Gomez-Garcia; Jose Maria Munoz-Ferreras; Wenjie Feng; Dimitra Psychogiou

doi:10.1109/LMWC.2018.2856400

Balanced Symmetrical Quasi-Reflectionless Single-and Dual-Band Bandpass Planar Filters

Roberto Gomez-Garcia
, Jose Maria Munoz-Ferreras
, Wenjie Feng
, Dimitra Psychogiou

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

Abstract

Microwave planar balanced single-/dual-band bandpass filters (BPFs) with symmetrical quasi-reflectionless differential-mode behavior are presented in this letter. They are made up of a direct single-/dual-band BPF branch with virtually short-ended stubs in differential-mode operation, whose input and output accesses are loaded with stub-loaded-type single-/dual-band bandstop filter (BSF) branches that are terminated with a resistor. These BSF branches exhibit a quasi-complementary transfer function with regard to the one of the BPF branch and absorb the differential-mode input-signal energy not transmitted by the filter to achieve quasi-reflectionless capabilities. The theoretical foundations of the proposed balanced quasi-absorptive single-/dual-band BPFs and synthesis examples are given. Furthermore, for experimental-demonstration purposes, microstrip prototypes of 3-GHz second-order single-band and 2.85/3.15-GHz first-order dual-band BPFs are manufactured and characterized.

Original language	English
Article number	8424884
Pages (from-to)	798-800
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	28
Issue number	9
DOIs	https://doi.org/10.1109/LMWC.2018.2856400
Publication status	Published - Sep 2018
Externally published	Yes

Keywords

Absorptive filter
balanced filter
bandpass filter (BPF)
bandstop filter (BSF)
differential-mode filter
dual-band filter
multiband filter
reflectionless filter
stub-loaded filter

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10.1109/LMWC.2018.2856400

Cite this

@article{3e5eb57e3ec84c748bb67da2ea9121a7,

title = "Balanced Symmetrical Quasi-Reflectionless Single-and Dual-Band Bandpass Planar Filters",

abstract = "Microwave planar balanced single-/dual-band bandpass filters (BPFs) with symmetrical quasi-reflectionless differential-mode behavior are presented in this letter. They are made up of a direct single-/dual-band BPF branch with virtually short-ended stubs in differential-mode operation, whose input and output accesses are loaded with stub-loaded-type single-/dual-band bandstop filter (BSF) branches that are terminated with a resistor. These BSF branches exhibit a quasi-complementary transfer function with regard to the one of the BPF branch and absorb the differential-mode input-signal energy not transmitted by the filter to achieve quasi-reflectionless capabilities. The theoretical foundations of the proposed balanced quasi-absorptive single-/dual-band BPFs and synthesis examples are given. Furthermore, for experimental-demonstration purposes, microstrip prototypes of 3-GHz second-order single-band and 2.85/3.15-GHz first-order dual-band BPFs are manufactured and characterized.",

keywords = "Absorptive filter, balanced filter, bandpass filter (BPF), bandstop filter (BSF), differential-mode filter, dual-band filter, multiband filter, reflectionless filter, stub-loaded filter",

author = "Roberto Gomez-Garcia and Munoz-Ferreras, \{Jose Maria\} and Wenjie Feng and Dimitra Psychogiou",

note = "Publisher Copyright: {\textcopyright} 2001-2012 IEEE.",

year = "2018",

month = sep,

doi = "10.1109/LMWC.2018.2856400",

language = "English",

volume = "28",

pages = "798--800",

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T1 - Balanced Symmetrical Quasi-Reflectionless Single-and Dual-Band Bandpass Planar Filters

AU - Gomez-Garcia, Roberto

AU - Munoz-Ferreras, Jose Maria

AU - Feng, Wenjie

AU - Psychogiou, Dimitra

PY - 2018/9

Y1 - 2018/9

N2 - Microwave planar balanced single-/dual-band bandpass filters (BPFs) with symmetrical quasi-reflectionless differential-mode behavior are presented in this letter. They are made up of a direct single-/dual-band BPF branch with virtually short-ended stubs in differential-mode operation, whose input and output accesses are loaded with stub-loaded-type single-/dual-band bandstop filter (BSF) branches that are terminated with a resistor. These BSF branches exhibit a quasi-complementary transfer function with regard to the one of the BPF branch and absorb the differential-mode input-signal energy not transmitted by the filter to achieve quasi-reflectionless capabilities. The theoretical foundations of the proposed balanced quasi-absorptive single-/dual-band BPFs and synthesis examples are given. Furthermore, for experimental-demonstration purposes, microstrip prototypes of 3-GHz second-order single-band and 2.85/3.15-GHz first-order dual-band BPFs are manufactured and characterized.

AB - Microwave planar balanced single-/dual-band bandpass filters (BPFs) with symmetrical quasi-reflectionless differential-mode behavior are presented in this letter. They are made up of a direct single-/dual-band BPF branch with virtually short-ended stubs in differential-mode operation, whose input and output accesses are loaded with stub-loaded-type single-/dual-band bandstop filter (BSF) branches that are terminated with a resistor. These BSF branches exhibit a quasi-complementary transfer function with regard to the one of the BPF branch and absorb the differential-mode input-signal energy not transmitted by the filter to achieve quasi-reflectionless capabilities. The theoretical foundations of the proposed balanced quasi-absorptive single-/dual-band BPFs and synthesis examples are given. Furthermore, for experimental-demonstration purposes, microstrip prototypes of 3-GHz second-order single-band and 2.85/3.15-GHz first-order dual-band BPFs are manufactured and characterized.

KW - Absorptive filter

KW - balanced filter

KW - bandpass filter (BPF)

KW - bandstop filter (BSF)

KW - differential-mode filter

KW - dual-band filter

KW - multiband filter

KW - reflectionless filter

KW - stub-loaded filter

UR - https://www.scopus.com/pages/publications/85051037068

U2 - 10.1109/LMWC.2018.2856400

DO - 10.1109/LMWC.2018.2856400

M3 - Article

AN - SCOPUS:85051037068

SN - 1531-1309

VL - 28

SP - 798

EP - 800

JO - IEEE Microwave and Wireless Components Letters

JF - IEEE Microwave and Wireless Components Letters

IS - 9

M1 - 8424884

ER -

Balanced Symmetrical Quasi-Reflectionless Single-and Dual-Band Bandpass Planar Filters

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