Highly Selective Broadband mm-Wave Diplexer Design

This letter presents a novel broadband diplexer design that is capable of achieving highly stringent rejection characteristics through the use of singlets whose interconnecting irises are formulated as resonant slot irises. The combination of these two resonant-cavity types allows for a unique filte...

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Bibliographic Details
Published inIEEE microwave and wireless technology letters (Print) Vol. 33; no. 2; pp. 149 - 152
Main Authors Bartlett, Chad, Glubokov, Oleksandr, Kamrath, Fynn, Hoft, Michael
Format Journal Article
LanguageEnglish
Published IEEE 01.02.2023
Subjects
Broadband communication
Couplings
Diplexer
filter design
Filtering theory
Loss measurement
Milling
Passband
Prototypes
resonant iris
singlet
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Summary:This letter presents a novel broadband diplexer design that is capable of achieving highly stringent rejection characteristics through the use of singlets whose interconnecting irises are formulated as resonant slot irises. The combination of these two resonant-cavity types allows for a unique filtering solution with increased filter order, wide available bandwidth, low geometric complexity, and simple milling requirements, which can be suitably applied to millimeter-wave and submillimeter-wave applications. A prototype is fabricated for operation in the <inline-formula> <tex-math notation="LaTeX">W </tex-math></inline-formula>-band (75-110 GHz) in order to cover a 10% fractional bandwidth in each passband. Measurement of the prototype denotes highly accurate results and exemplifies the use of all resonator and coupling elements in order to support ten poles and four transmission zeros in an elegant diplexer solution.
ISSN:2771-957X
2771-9588
DOI:10.1109/LMWC.2022.3205425