A novel reduced-size rat-race broadside coupler and its application for CMOS distributed sub-harmonic mixer
Journal
IEEE Microwave and Wireless Components Letters
Journal Volume
18
Journal Issue
3
Pages
194-196
Date Issued
2008
Author(s)
Abstract
A broadband distributed sub-harmonic resistive field effect transistor mixer with a novel modified rat-race broadside coupler using a 0.13-μm CMOS foundry process is presented in this letter. Using the broadside coupler, a reduced-size rat-race is fabricated with a compact size of 110 × 80 μm2, From the measurement results, the mixer achieved a conversion loss of 12 dB from 32 to 70 GHz of RF frequency. The passive sub-harmonic mixer has zero power consumption. With the modified rat-race broadside coupler, the mixer achieves a good LO-IF isolation of better than 30 dB and a compact core chip size of 0.55 × 0.4 mm2. © 2008 IEEE.
Subjects
CMOS; Distributed circuit; Monolithic microwave integrated circuit (MMIC); Sub-harmonic mixer
SDGs
Other Subjects
CMOS integrated circuits; Electric power utilization; Electric variables measurement; Field effect transistors; Monolithic microwave integrated circuits; Conversion losses; Distributed circuits; Sub-harmonic mixers; Mixer circuits
Type
journal article