Bulg. J. Phys. vol.21 no.3-4 (1994), pp. 065-071

A Microwave Dicke-Type Radiometer Front-End for Polarization Studies of Natural Objects

B.I. Vichev, K.G. Kostov, E.N. Krasteva
Institute of Electronics, Bulgarian Academy of Sciences, 72, Tsarigradsko Shose Blvd., Sofia 1784, Bulgaria
Abstract. The topics of this paper concern the design and performance description of a microwave Dicke-type radiometer front-end polarization unit, implemented with a conventional Y-circulator and two PIN diaphragms. A numerical evaluation of the contribution of the real components on the transmission coefficient in comparison with the ideal case of a front-end of matched components without losses is presented. Results of laboratory and field testing of the front-end unit are given.

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