MODEM FOR HYPERFREQUENCY BADGE, WITH REFLECTIVE AMPLIFIER.

摘要

The invention relates to the modem included in the badge or mobile station, in a microwave data exchange system with a fixed station or beacon. BR/ According to the invention, the modem (4) comprises at least one transistor (11) which operates as a detector, on reception, or as a reflection amplifier, on transmission, according to the polarization voltages (Vg s 0, Vg s 1) which are applied to it, and the resulting drain currents (Id s). The transmission / reception switching is done by means of transistors (27, 28, 40) which switch the charges, therefore the currents, on the amplifier transistor (11). Amplitude or phase modulation. BR/ Application to short-distance telecommunications. / P