Abstract
A Ka-Band hybrid integrated single-ended mixer with low conversion loss is designed in this paper. In the proposed circuit architecture, metallic via holes are implemented along the mounting edge of substrate embedded in the split-block of WG (waveguide)-finline-microstrip transition. Simulated results show that the effect of high-order modes due to the mounting groove is effectively eliminated and the transition loss is greatly improved. Meanwhile, a slow wave and bandstop filter at Ka band, which presents an equivalent short circuit, is designed for the maximized utilization of idle frequency energy, RF and LO signal energy. In this way, the conversion loss of the mixer can be further improved. The lowest measured conversion loss 3.52dB is obtained at 32.2 GHz; the conversion loss is flat and less than 5.68dB over the frequency band from 29 to 34 GHz.
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Acknowledgement
The authors are grateful to Elaine Zhao, who works in sales office of Skyworks Inc. in Shanghai, to provide diode samples to us. The authors also acknowledge Kang Yin and Zichuan Zhao for their assistance in experiment work.
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Supported in part by National Natural Science Foundation of China (NSFC) under Grants 60621002 and in part by NSFC under Grants 60471017.
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Yao, C., Xu, J. & Chen, M. Low Conversion Loss Mixers with Improved Finline Transition and Bandstop Filter. J Infrared Milli Terahz Waves 30, 243–249 (2009). https://doi.org/10.1007/s10762-008-9444-8
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DOI: https://doi.org/10.1007/s10762-008-9444-8