SEMICONDUCTOR INTEGRATED CIRCUITS
Li Qin, Wang Zhigong and Xu Leijun
Abstract: A broadband miniature doubly balanced diode mixer chip fabricated by Win’s 0.15 μm pHEMT technology is presented. In order to save chip area, a four-fold modified Marchand balun is used. A coupled line U section improves the port to port isolation and provides the IF-output port. The mixer achieves a low conversion loss of 5.5 to 10.7 dB and high isolation of more than 26 dB over a 26–40 GHz RF/LO bandwidth and a DC–14 GHz IF bandwidth. The mixer’s chip size is around 0.96 mm2.
Key words: doubly balanced, Marchand balun, conversion loss
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Received: 18 August 2015 Revised: 17 October 2009 Online: Published: 01 March 2010
| Citation: |
Li Qin, Wang Zhigong, Xu Leijun. A millimeter-wave monolithic doubly balanced diode mixer[J]. Journal of Semiconductors, 2010, 31(3): 035005. doi: 10.1088/1674-4926/31/3/035005
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Li Q, Wang Z G, Xu L J. A millimeter-wave monolithic doubly balanced diode mixer[J]. J. Semicond., 2010, 31(3): 035005. doi: 10.1088/1674-4926/31/3/035005.
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