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Solid State Transmitters (Tx) have been used in radar application for many years. The main advantages of the pulsed Tx are the followings: -Low distortion of amplitude and phase during the pulse. -High reproducibility of identical pulses. -High quality of output spectrum: low harmonic contents and reduced delay time. In this paper we present the design and the measured results of 30W C-band Transmitter and 8W Ku band Transmitter ,used for the Poseidon 2 Altimeter. (Jason satellite).9

Alcatel developed a new generation of dual-frequency radar altimeter (POSEIDON 2) which works in C and Ku band. This article discusses about the radiofrequency unit (RFU) which plays a major role for the stringent performances of the altimeter. The compact RF unit has been designed with a modular concept. It uses the new advanced technologies: extensively use of MMIC, pHemt LNA and hybrid HFET power amplifiers. The transmitted peak power level is greater than 23W in C band and 7W in Ku band.