A wideband Gilbert cell mixer with an integrated Marchand balun using 0.5- Delta mm GaAs enhancement-mode pHEMT technology

In this study, a fully integrated active Gilbert cell mixer with two Marchand baluns was proposed.The proposed circuit was designed at 12 GHz with bandwidth from 7.5 to 19 GHz and fabricated in a 0.5-m pHEMT process. In addition, the current bleeding technique was also provided in the Gilbert cell m...

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Bibliographic Details
Published in:Microwave and optical technology letters 2010-06, Vol.52 (6), p.1302-1306
Main Authors: Fu, Jeffrey S, Kuo, Che-Yu, Lin, Shao-Wei, Ke, Po-Yu, Chiu, Hsien-Chin
Format: Article
Language:English
Subjects:
Baluns
Circuit design
Conversion
Gain
Gallium arsenide
Microwaves
Mixers
Noise levels
Online Access:Get full text
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Summary:In this study, a fully integrated active Gilbert cell mixer with two Marchand baluns was proposed.The proposed circuit was designed at 12 GHz with bandwidth from 7.5 to 19 GHz and fabricated in a 0.5-m pHEMT process. In addition, the current bleeding technique was also provided in the Gilbert cell mixer to boost the conversion gain. The greatest conversion gain of 4.5 dB can be achieved in the designed circuit under LO input power of -2 dBm. Both RF-IF and LO-IF isolations were better than 30 dB. The third order intercept point input power, IIP3, achieved as high as 2 dBm. The mixer works from 7.5 to 19 GHz.
ISSN:0895-2477
DOI:10.1002/mop.25174