Improved HBT MMIC Active Mixer for Wireless Applications

Man Long HER  Kun Ying LIN  Yi Chyun CHIOU  Chih Yuan HSIEH  

IEICE TRANSACTIONS on Electronics   Vol.E87-C    No.6    pp.1082-1084
Publication Date: 2004/06/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
heterojunction bipolar transistor (HBT),  monolithic microwave integrated circuit (MMIC),  mixer,  low-noise amplifier (LNA),  active power adder,  

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In this study, an improved heterojunction bipolar transistor (HBT) monolithic microwave integrated circuit (MMIC) active mixer is designed and fabricated. The HBT MMIC active mixer that is integrated with a low-noise amplifier (LNA) and active power adder can not only achieve high isolation, but can also dispense with one active component and reduce power consumption at the same time. Measurement results show that the conversion gain, LO-RF isolation, and double sideband noise figure (DSB-NF) of the proposed mixer are 22 dB, 40 dB, and 7 dB, respectively.