Title :
X-Band Full MMIC QPSK Modulator with Direct Oscillator for the Spot 5 Earth Observation Satellite Payload
Author :
Cartier, N. ; Hussonnois, M. ; Tranier, B. ; Maynadier, P. ; Midan, E. ; Sutter, M. ; Boutet, P. ; Buret, H. ; Clérino, A.
Author_Institution :
Alcatel Space Industries BP 1187 26 av. JF. Champollion 31037 Toulouse, France. Phone: +33 5 34 35 64 40, Fax: +33 5 34 35 69 47, e-mail: Nicolas.Cartier@space.alcatel.fr
Abstract :
This paper presents a QPSK modulator equipment designed and qualified for space applications. It enables high data rate transmission for Earth observation satellites. The equipment is based on a full MMIC RF chain, including a MMIC QPSK linear vector modulator, and features a direct X band Local oscillator (LO). Data rates up to 2×150 Mbits/s and RF output power up to 6 W for LO frequencies between 7.2 and 8.5 GHz can be achieved. Design description and Qualification Model performances are provided in this paper.
Keywords :
Artificial satellites; Attenuators; Driver circuits; MMICs; Payloads; Power generation; Quadrature phase shift keying; Radio frequency; Vectors; Voltage-controlled oscillators;
Conference_Titel :
Microwave Conference, 1999. 29th European
Conference_Location :
Munich, Germany
DOI :
10.1109/EUMA.1999.338354
