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A Ka-band high-isolation waveguide power divider with planar output ports and out-of-phase

Published online by Cambridge University Press:  08 April 2022

Cong Tang Open the ORCID record for Cong Tang [Opens in a new window] ,
Xin Gao ,
Hongquan Zhu  and
Jinrong Zhang
Cong Tang
Affiliation:
Department of Telemetry and Telecommand, Beijing Institute of Tracking and Telecommunication Technology, Beijing, P. R. China Southwest China Institute of Electronic Technology, Chengdu, P. R. China
Xin Gao
Affiliation:
Department of Telemetry and Telecommand, Beijing Institute of Tracking and Telecommunication Technology, Beijing, P. R. China
Hongquan Zhu*
Affiliation:
Department of Telemetry and Telecommand, Beijing Institute of Tracking and Telecommunication Technology, Beijing, P. R. China
Jinrong Zhang
Affiliation:
Department of Telemetry and Telecommand, Beijing Institute of Tracking and Telecommunication Technology, Beijing, P. R. China
*
Author for correspondence: Hongquan Zhu, E-mail: zhuhongquan@tsinghua.org.cn
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Abstract

A waveguide power divider based on ridge waveguide to microstrip line transition is presented in this paper. To improve the isolation performance, a probe insulator is inserted into the contact face from the center of the waveguide side wall, also two chip resistors are mounted on a planar substrate and connected with the probe to absorb the coupled energy. The impedance transformation is accomplished by ridge waveguide to microstrip line transition, which is hidden in the waveguide. This proposed power divider shows merits of waveguide power dividers and substrate-integrated waveguide power dividers simultaneously, i.e. planar output ports, compact size, and high isolation. For verification, a power divider operating at the Ka-band is simulated, fabricated, and measured. The obtained results show the return loss and isolation are better than 10 and 20 dB, respectively. The measured insertion loss is <1.5 dB, including the insertion loss of waveguide to microstrip line transitions at the output port in the range of 34.6–39 GHz.

Keywords

Ka-bandpower dividerhigh isolationwaveguide
Type
Passive Components and Circuits
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 2 , March 2023 , pp. 191 - 197
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Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press in association with the European Microwave Association

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