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A fully integrated 5.2 GHz GaInP/GaAs HBT upconversion micromixer with output LC current combiner and oscillator

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5 Author(s)
Meng, C.C. ; Dept. of Commun. Eng., Nat. Chiao-Tung Univ., Hsin-Chu, Taiwan ; Hsu, S.K. ; Peng, A.S. ; Wen, S.Y.
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A 5.2 GHz upconversion micromixer with output LC current combiner and integrated oscillator is demonstrated in 2 μm GaInP/GaAs HBT technology in this paper. Micromixer has a single-ended input and a passive LC current combiner is used to convert mixer differential output into a single-ended output. A cross-coupled LC oscillator with oscillation frequency of 4.3 GHz and a cascode buffer amplifier are also integrated in the same chip. The die size is 1 mm2. The fully integrated upconversion micromixer has conversion gain of -2.5 dB, OP1dB of -12.5 dBm and 40 dB RF-IF isolation when input IF=0.9 GHz and thus output RF=5.2 GHz. The IF input return loss is better than 25 dB for frequencies up to 6 GHz while RF output return loss is better than 12 dB for frequencies from 5.15 GHz to 5.35 GHz.

Published in:

Radio Frequency Integrated Circuits (RFIC) Symposium, 2003 IEEE

Date of Conference:

8-10 June 2003

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