The badge modem for manufacturing process, has a reflection amplifier.

摘要

The invention relates to the modem included in the badge or mobile station, in a data exchange system by microwaves 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, at reception, or in reflection amplifier, the transmission, according to the bias voltages (vg s 0 and vg s 1) of the grid, which are applied to it, and the drain current (id s), which result therefrom. The switching of the transmission / reception is done by means of transistors (27, 28, 40) which switch the charges, and therefore the currents, on the amplifier transistor (11). Amplitude modulation or phase. & br / application to telecommunications at short distances.