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Miniature single-sideband subharmonically-pumped 60 GHz direct upconverter in a uniplanar GaAs pHEMT technology using inductive and capacitive loading techniques

Published online by Cambridge University Press:  23 April 2013

Khelifa Hettak ,
Tyler N. Ross ,
Nazish Irfan ,
Gabriel Cormier ,
Mustapha C. E. Yagoub ,
Gilbert A. Morin  and
Jim S. Wight
Khelifa Hettak*
Affiliation:
Communications Research Centre Canada, 3701 Carling Avenue, P.O. Box 11490, Station H, Ottawa, ON, CanadaK2H 8S2
Tyler N. Ross
Affiliation:
Department of Electronics, Carleton University, 1125 Colonel By Drive, Ottawa, ON, CanadaK1S 5B6
Nazish Irfan
Affiliation:
School of Information Technology and Engineering, University of Ottawa, 800 King Edward Avenue, Ottawa, ON, CanadaK1N 6N5
Gabriel Cormier
Affiliation:
Faculté d'ingénierie, Université de Moncton, 18 avenue Antonine-Maillet, Moncton, NB, CanadaE1A 3E9
Mustapha C. E. Yagoub
Affiliation:
School of Information Technology and Engineering, University of Ottawa, 800 King Edward Avenue, Ottawa, ON, CanadaK1N 6N5
Gilbert A. Morin
Affiliation:
Defence Research and Development Canada, 3701 Carling Avenue, Ottawa, ON, CanadaK1A 0Z4
Jim S. Wight
Affiliation:
Department of Electronics, Carleton University, 1125 Colonel By Drive, Ottawa, ON, CanadaK1S 5B6
*
Corresponding author: K. Hettak Email: khelifa.hettak@crc.gc.ca
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Abstract

This paper presents a novel, compact, single-sideband (SSB) subharmonically-pumped (SHP) direct upconverter developed in a uniplanar 0.18 μm GaAs technology. A total of 100 MHz in-phase and quadrature signals directly modulate the second harmonic of a 30 GHz carrier signal, producing a 60.1 GHz output. Two pairs of antiparallel diodes reduce feed-through of the 30 GHz local oscillator (LO) signal to the mixer's RF output. Novel structures patterned in the center conductor of a coplanar waveguide (CPW) provide matching and size-reduction simultaneously. The 2.1mm2 circuit also uses a miniaturized Wilkinson divider based on asymmetric coplanar stripline and a standard CPW 90° coupler. The SSB SHP direct upconverter exhibits a conversion loss of 10 dB, a lower-sideband rejection of 15 dB and 2fLO suppression of approximately 25 dB over a wide frequency range from 52–61 GHz.

Keywords

Circuit design and applicationsPassive components and circuit
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 5 , Special Issue 3: European Microwave Week 2012 , June 2013 , pp. 319 - 328
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2013 

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