A 23-37 GHz miniature MMIC subharmonic mixer

Che Hung Lin; Yu Ann Lai; Jui Chieh Chiu; Yeong Her Wang

doi:10.1109/LMWC.2007.903460

A 23-37 GHz miniature MMIC subharmonic mixer

Che Hung Lin, Yu Ann Lai, Jui Chieh Chiu, Yeong Her Wang

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

A novel configuration of subharmonic mixer using an anti-parallel diode pair is presented for operating over the 23-37 GHz band. The monolithic microwave integrated circuit is implemented by GaAs 0.15 μm PHEMT technology with the compact size of 0.85 × 0.85 mm². This mixer employs a directional coupler, LC low-pass filter, and a short stub for isolating three ports corresponding to radio frequency (RF), local oscillation (LO) input, and intermediate frequency (IF) output ports. The directional coupler also provides impedance transformation between the diode pair, RF, and LO ports. This makes the subharmonic mixer more compact and flexible. The best conversion loss of the subharmonic mixer is 9.4 dB, and the LO-to-RF and LO-to-IF isolations are better than 22 and 31 dB, respectively.

Original language	English
Pages (from-to)	679-681
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	17
Issue number	9
DOIs	https://doi.org/10.1109/LMWC.2007.903460
Publication status	Published - 2007 Sep 1

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Electrical and Electronic Engineering

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abstract = "A novel configuration of subharmonic mixer using an anti-parallel diode pair is presented for operating over the 23-37 GHz band. The monolithic microwave integrated circuit is implemented by GaAs 0.15 μm PHEMT technology with the compact size of 0.85 × 0.85 mm2. This mixer employs a directional coupler, LC low-pass filter, and a short stub for isolating three ports corresponding to radio frequency (RF), local oscillation (LO) input, and intermediate frequency (IF) output ports. The directional coupler also provides impedance transformation between the diode pair, RF, and LO ports. This makes the subharmonic mixer more compact and flexible. The best conversion loss of the subharmonic mixer is 9.4 dB, and the LO-to-RF and LO-to-IF isolations are better than 22 and 31 dB, respectively.",

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