volume | PIER Journals

2010-08-13

V-Band High Isolation Subharmonic Monolithic Mixer with Hairpin Diplexer

Shih-Han Hung,

Dr. Shih-Han Hung

Department of Electrical Engineering

National Cheng-Kung University

Taiwan

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Wei-Chih Chien,

Dr. Wei-Chih Chien

Department of Electrical Engineering

National Cheng-Kung University

Taiwan

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Chih-Ming Lin,

Dr. Chih-Ming Lin

Department of Electrical Engineering

National Cheng-Kung University

Taiwan

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Yu-Ann Lai,

Dr. Yu-Ann Lai

Department of Electrical Engineering

National Cheng-Kung University

Taiwan

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Yeong-Her Wang

Prof. Yeong-Her Wang

Institute of Microelectronics, Department of Electrical Engineering

National Cheng-Kung University

Taiwan, ROC

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Progress In Electromagnetics Research Letters, Vol. 16, 161-169, 2010

doi:10.2528/PIERL10070701

Abstract

A 54-66 GHz sub-harmonic monolithic passive mixer using the standard 0.15 μm pHEMT process is demonstrated. The proposed mixer is composed of a hairpin diplexer, an open stub, and a low-pass filter. The mixer also utilizes a pair of anti-parallel diodes to achieve a subharmonic mixing mechanism. The hairpin diplexer formed with two parallel-coupled line band-pass filters is used to improve the isolation between the radio frequency (RF) and local oscillation (LO) ports. The low-pass filter supports an intermediate frequency (IF) ranging from dc to 1 GHz. This proposed configuration leads to a die size of less than 1.5 mm². With a conversion loss of 15.2--18.3 dB, the 2LO-to-RF isolation is found to be better than 27.5 dB. A high LO-to-RF isolation of 23.5--45 dB over 54--66 GHz RF bandwidth, as well as 1 dB compression power of 8 dBm, can be achieved.

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Shih-Han Hung, Wei-Chih Chien, Chih-Ming Lin, Yu-Ann Lai, and Yeong-Her Wang, "V-Band High Isolation Subharmonic Monolithic Mixer with Hairpin Diplexer," Progress In Electromagnetics Research Letters, Vol. 16, 161-169, 2010.
doi:10.2528/PIERL10070701

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