A method for selecting one of a plurality of antennas of a reception antenna diversity - and - antenna diversity receiver system.

摘要

In a reception antenna diversity - are in an antenna unit (a) a plurality of antennae (a1, a2, a3, a4) are connected to the inputs of an antenna selection switch (as), whose output is connected via an antenna amplifier (av) with the input of a first soft (w1) is connected. The output of the first diverter (w1) is connected via a parallel circuit consisting of a rest load resistor (rr) and a series circuit comprising a load resistor (rl) and a controllable switch (s) is connected to reference potential, and via an antenna line (al), for example, a hf - line or a light conducting fiber, with the input of a second switch (w2) connected to a receiver unit (e). The output of the second switch (w2) is connected to a radio receiver (tu) connected in an evaluation circuit (aw) and a logic circuit arrangement (mp) which is connected to the evaluation circuit (aw) is connected. For controlling the antennas selection switch (as), the evaluation circuit (aw) sends control signals to the antenna unit (a). The antenna unit (a), for switching on of the selection circuit (aw) with a direct current, of the controllable switch (s). By switching off this direct current, the antenna unit (a) inactivated, wherein the controllable switch (s) of the control circuit (ss) is again opened. At the resistor at the output of the antenna line (al) recognizes the evaluation circuit (aw) and / or the logic circuit (mp), for example a microprocessor, ..