DocumentCode :
1093063
Title :
A High Conversion-Gain 
-Band InP DHBT Subharmonic Mixer Using LO Frequency Doubler
Author :
Johansen, Tom K. ; Vidkjær, Jens ; Krozer, Viktor ; Konczykowska, Agnieszka ; Riet, Muriel ; Jorge, Filipe ; Djurhuus, Torsten
Author_Institution :
Tech. Univ. of Denmark, Lyngby
Volume :
56
Issue :
3
fYear :
2008
fDate :
3/1/2008 12:00:00 AM
Firstpage :
613
Lastpage :
619
Abstract :
The paper presents analysis and design of a Q-band subharmonic mixer (SHM) with high conversion gain. The SHM consists of a local oscillator (LO) frequency doubler, RF pre-amplifier, and single-ended mixer. The SHM has been fabricated in a high-speed InP double heterojunction bipolar transistor (DHBT) technology using coplanar waveguide structures. To the best of our knowledge, this is the first demonstration of an SHM using InP DHBT technology at millimeter-wave frequencies. The measured results demonstrate a conversion gain of 10.3 dB at 45 GHz with an LO power of only 1 mW. The fundamental mixing product is suppressed by more than 24 dB and the output is around . The mixer is broadband with a conversion gain above 7 dB from 40 to 50 GHz. The conversion gain for the fabricated SHM is believed to be among the best ever reported for millimeter-wave SHMs.
Keywords :
III-V semiconductors; bipolar MIMIC; coplanar waveguides; frequency multipliers; indium compounds; millimetre wave mixers; nonlinear network analysis; oscillators; preamplifiers; InP; Q-band; RF pre-amplifier; bipolar MIMIC; coplanar waveguide structures; frequency 40 GHz to 50 GHz; gain 10.3 dB; heterojunction bipolar transistor; local oscillator frequency doubler; millimetre wave mixers; nonlinear network analysis; power 1 mW; subharmonic mixer; Coplanar waveguides; Double heterojunction bipolar transistors; Gain; Image converters; Indium phosphide; Local oscillators; Millimeter wave technology; Millimeter wave transistors; Mixers; Radio frequency; Coplanar waveguides (CPWs); heterojunction bipolar transistors (HBTs); millimeter-wave circuit; mixer analysis; monolithic microwave integrated circuits (MMICs); nonlinear circuit analysis; subharmonic mixer (SHM);
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2008.916892
Filename :
4463927
Link To Document :
