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A High-Bit Rate Ka-Band Direct Conversion QPSK Demodulator

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5 Author(s)
Hamed, K.W. ; Mimix Broadband, Inc., Houston, TX ; Freundorfer, A.P. ; Antar, Y.M.M. ; Frank, P.
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This letter presents a Ka-band high bit rate direct conversion QPSK demodulator. The demodulator was monolithically implemented using GalnP-GaAs HBT process. Measured results of the packaged demodulator show a conversion gain of 8 dB, LO and RF port match better than 10 dB, input 1-dB gain compression point occurring at 3 dBm, and I/Q phase and amplitude mismatch within plusmn3deg and plusmn0.5 dB, respectively. The detection performance of the developed demodulator has been examined with bit rates up to 1 Gb/s and excellent performance has been obtained.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:18 ,  Issue: 5 )

Date of Publication:

May 2008

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