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

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 compressi...

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Veröffentlicht in:	IEEE microwave and wireless components letters 2008-05, Vol.18 (5), p.365-367
Hauptverfasser:	Hamed, K.W., Freundorfer, A.P., Antar, Y.M.M., Frank, P., Sawatzky, D.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Bit rate Circuit properties Demodulation Design. Technologies. Operation analysis. Testing Direct conversion receivers Electric, optical and optoelectronic circuits Electronic circuits Electronics Exact sciences and technology GaAs process Gain measurement heterojunction bipolar transistor (HBT) Heterojunction bipolar transistors Image converters Integrated circuits Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits millimeter-wave circuits monolithic microwave integrated circuits (MMICs) Packaging Phase measurement Q measurement QPSK demodulator Quadrature phase shift keying Radio frequency Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Signal convertors
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Beschreibung
Zusammenfassung:	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.
ISSN:	1531-1309 1558-1764
DOI:	10.1109/LMWC.2008.922134