A 5.8 GHz QPSK modulator

Author

Psaltakis, M. ; Vafiadis, E. ; Sahalos, J.N.

Author_Institution

Dept. of Phys., Aristotle Univ. of Thessaloniki, Greece

fYear

2000

fDate

2000

Firstpage

108

Lastpage

109

Abstract

Summary form only given. A QPSK modulator can be configured with a 90° coupler, two balanced (BPSK) modulators, and a power combiner. In the modulator of the present design the LO carrier operating at f_c=5.8 GHz is connected to the input of a conventional 90° branch line hybrid producing the two signal paths in phase quadrature, to be used in BPSK modulators. The stream of polar (NRZ) pulses applied to each modulator has a data rate of 100 Mbps. Balanced modulators implemented as passive balanced mixers by use of rat-race hybrids and Schottky diodes. For diodes, the HP device HSMS-202 has been used. It contains a pair of Schottky diodes properly connected for mixer applications and it is offered in a surface mount package suitable for MIC implementations

Keywords

Schottky diode mixers; microwave integrated circuits; microwave mixers; modulators; power combiners; quadrature phase shift keying; surface mount technology; 100 Mbit/s; 5.8 GHz; 90° branch line hybrid; 90° coupler; HSMS-202; LO carrier; MIC implementations; QPSK modulator; SHF; Schottky diodes; balanced modulators; data rate; passive balanced mixers; polar NRZ pulses; power combiner; rat-race hybrids; surface mount package; Binary phase shift keying; Microwave integrated circuits; Optical signal processing; Packaging; Phase modulation; Power combiners; Pulse modulation; Quadrature phase shift keying; Schottky diodes; Signal design;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Electromagnetism, 2000. Proceedings of the Second International Symposium of Trans Black Sea Region on

Conference_Location

Xanthi

Print_ISBN

0-7803-6428-7

Type

conf

DOI

10.1109/AEM.2000.943265

Filename

943265