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