A Q-band miniaturized uniplanar MMIC HEMT mixer
Resource
Microwave Symposium Digest, 2004 IEEE MTT-S International
Journal
Microwave Symposium Digest, 2004 IEEE MTT-S International
Pages
-
Date Issued
2004-06
Date
2004-06
Author(s)
Wang, Chi-Hsueh
Lin, Yo-Shen
Wang, Huei
Chen, Chun Hsiung
DOI
0149-645X
Abstract
A miniaturized uniplanar GaAs MMIC HEMT mixer is proposed based on a compact multifunction transition structure. By the independence nature of the coplanar-waveguide (CPW) mode and the coplanar-stripline (CPS) mode, a compact transition which converts the CPW mode into the CPS mode is realized. This transition structure also has the functions of 180/spl deg/ hybrid, RF and LO diplexer, and bandpass filter. Thus the size of the proposed mixer may be drastically reduced, and the LO-to-IF and LO-to-RF isolations and RF conversion gain are excellent. This mixer is designed to operate with RF frequency from 35 to 40 GHz, IF frequency from 0.5 to 6 GHz, and LO frequency at 35 GHz. The lower sideband conversion gain is about 5 dB, the single-sideband (SSB) noise figure is 6.5 dB, the isolations are all better than 30 dB, and the size of the mixer is much compact than those of the conventional mixers.
SDGs
Type
journal article
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