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Ka-band Wide-Isolation-Bandwidth Waveguide Power Divider Using Microstrip-Probe Isolation Circuit

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Abstract

A Ka-band wide-isolation-bandwidth waveguide power divider using a microstrip-probe isolation circuit is proposed in this paper. A novel microstrip-probe isolation circuit is presented and applied to the waveguide Gysel power divider to improve the output isolation. At the same time, the proposed microstrip-probe isolation network has a wider bandwidth compared with the conventional isolation network. The proposed wideband waveguide Gysel power divider is designed, fabricated, and measured. Good agreement between simulated and measured results is found for the proposed power divider. The measured results show that the average insertion loss is about 0.45 ± 0.25 dB within the frequency range from 26.5 to 35.7 GHz. The measured output return loss is greater than 20 dB within the frequency range of 26.5 to 35.5 GHz (28.6% fractional bandwidth), and its phase imbalance between the two output ports is ± 1° in the frequency range of 27.5 to 36.5 GHz. Moreover, the measured output isolation is greater than 14 dB from 26.5z to 36.3 GHz (31.1% fractional bandwidth ).

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Funding

The work was supported by the National Natural Science Foundation of China (Grant No. 61771094 and Grant No. 62171097) and by Sichuan Science and Technology Program (Grant No. 2019JDRC0008).

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Author notes

  1. Kaijun Song

    Present address: EHF Key Laboratory of Science, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, People’s Republic of China

Authors and Affiliations

  1. EHF Key Laboratory of Science, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, People’s Republic of China

    Xueyuan Ding, Yuxuan Chen & Yedi Zhou

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  1. Kaijun Song
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  2. Xueyuan Ding
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  3. Yuxuan Chen
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Contributions

Conceptualization, K.S.; validation, X.D., Y.C., Y.Z.; investigation, K.S.; data curation, X.D.; writing—original draft preparation, K.S. and Y.C.; writing—review and editing, X.D.; supervision, K.S. and Y.Z.; funding acquisition, K.S. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Kaijun Song.

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Song, K., Ding, X., Chen, Y. et al. Ka-band Wide-Isolation-Bandwidth Waveguide Power Divider Using Microstrip-Probe Isolation Circuit. J Infrared Milli Terahz Waves 43, 303–313 (2022). https://doi.org/10.1007/s10762-022-00849-3

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