DocumentCode
2123419
Title
Phase Compensated QPSK Demodulator with a C-Band I.F. for VSAT System Applications
Author
Geelen, B.D.Brewster ; Robertson, I.D.
Author_Institution
Satellite Microwave & Communications, Postbus 10416, 6000 GK Weert, The Netherlands.
Volume
2
fYear
1994
fDate
5-9 Sept. 1994
Firstpage
1559
Lastpage
1564
Abstract
A microstrip hybrid based QPSK demodulator operating with a 4GHz I.F., for simplified VSAT receive terminals, is presented. The design features independent inphase and quadrature RF arm phase trimming. Implementation is based on varactor tuned phase shifters and single balanced mixers, contained within a substrate dimension of 50 × 55mm. The approach demonstrates that accurate constellation responses can be achieved with a low tolerance assembly, constructed in a conventional microstrip form.
Keywords
Assembly; Circuit optimization; Demodulation; Microstrip; Microwave circuits; Phase shifters; Quadrature phase shift keying; Radio frequency; Satellites; Schottky diodes;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 1994. 24th European
Conference_Location
Cannes, France
Type
conf
DOI
10.1109/EUMA.1994.337439
Filename
4138485
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