Journal
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
Volume 32, Issue 1, Pages 9-12Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2021.3116103
Keywords
Couplers; Couplings; Bandwidth; Standards; Apertures; Waveguide components; Transformers; Directional coupler; full bandwidth; hybrid coupler; waveguide
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Funding
- Spanish Ministry of Science, Innovation and Universities [TEC2017-83343-C4-1-R]
- European Fund for Economic and Regional Development (FEDER)
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This study presents an easily scalable quadrature hybrid coupler topology with a compact design, good performance, and flexibility for redesign based on specific requirements. A prototype at Ku-band was successfully manufactured and measured to confirm the simulation results.
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.
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