An Ultra-Compact Full-Band Waveguide Quadrature Hybrid Coupler

This work proposes an easily scalable quadrature hybrid coupler (QHC) topology with two symmetric stepped apertures that originate a square coaxial-like mid-section. This new configuration enables an ultra-compact design, three times shorter than equivalent structures, having 40% of fractional bandw...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 32; no. 1; pp. 9 - 12
Main Authors Cano, Juan Luis, Ceccato, Gabriele, Fernandez, Tomas, Mediavilla, Angel, Perregrini, Luca
Format Journal Article
LanguageEnglish
Published IEEE 01.01.2022
Subjects
Apertures
Bandwidth
Couplers
Couplings
Directional coupler
full bandwidth
hybrid coupler
Transformers
waveguide
Waveguide components
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Summary:This work proposes an easily scalable quadrature hybrid coupler (QHC) topology with two symmetric stepped apertures that originate a square coaxial-like mid-section. This new configuration enables an ultra-compact design, three times shorter than equivalent structures, having 40% of fractional bandwidth with 25 dB of matching/isolation and 1 dB of axial ratio (AR). The impedance transformers can be easily redesigned to meet other requirements related to electrical performance or even other desired coupling values. For verification purposes, a prototype at Ku -band was manufactured and measured showing good agreement with simulation results.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2021.3116103