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ORIGINAL RESEARCH article
Front. Astron. Space Sci.
Sec. Astronomical Instrumentation
Volume 12 - 2025 | doi: 10.3389/fspas.2025.1538558
Design of an Eight-Hole Directional Coupler for W-Band Cryogenic Receivers
Provisionally accepted- 1 Guangxi University, Nanning, China
- 2 Shanghai Astronomical Observatory, Chinese Academy of Sciences (CAS), Shanghai, Shanghai Municipality, China
- 3 Shanghai University, Shanghai, Shanghai Municipality, China
For the system noise temperature calibration of the K/Q/W triple-band cryogenic receiver on Tianma Radio Telescope (TMRT), a design of W-band eight-hole waveguide directional coupler is proposed in this paper. Based on the hole coupling principle proposed by Gian Guido Gentili, a simulation model of the eight-hole coupler is designed by ANSYS HFSS. Both simulation and experimental results demonstrate that the coupler exhibits excellent performance across the the 80-110 GHz, with a coupling ranging from -25 to -26 dB, directivity greater than 11 dB, isolation below -38 dB.
Keywords: W-Band, directional coupler, circular hole coupling, eight-hole coupling, broadband directional coupler
Received: 03 Dec 2024; Accepted: 21 Jan 2025.
Copyright: © 2025 Yan, Zhong, Ma, Zhang, Zhang, Pu and Wang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Weiye Zhong, Shanghai Astronomical Observatory, Chinese Academy of Sciences (CAS), Shanghai, 200030, Shanghai Municipality, China
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