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A s-band image rejection mixer based on microstrip with high image rejection ratio

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  • Xiuqi Xue

Abstract

This paper presents an image rejection mixer (IRM) with a high image rejection ratio (IRR), which is suitable for S-band radar systems. Traditional IRMs are limited by factors such as the amplitude-phase imbalance of quadrature couplers and poor device consistency, leading to a significant decrease in IRR when operating in a wide frequency band. To address the above issues, our improvement measures include: adding a fan-shaped stub to the output port of the quadrature coupler; adding a parallel stub to the output port of the single balanced mixer (SBM); replacing the $ 50\Omega $ 50Ω load terminal with a matched load. The simulation and test results show that the IRR of the IRM reaches 27.8 dB.

Suggested Citation

  • Xiuqi Xue, 2026. "A s-band image rejection mixer based on microstrip with high image rejection ratio," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 40(9), pages 1493-1500, June.
    • Handle: RePEc:taf:tewaxx:v:40:y:2026:i:9:p:1493-1500
    DOI: 10.1080/09205071.2026.2641501
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