A power interface circuit for an active antenna and a method for feeding a remote active antenna

摘要

A power interface circuit for an active antenna to the coupling of a supply voltage of a radio receiver (10) to an antenna feed (35), comprising:– a dc input;– a between the dc input (34) and of the antennas supply (35) connected in series power switching element, wherein the power switch element to have a control input for the selection of a conducting state or of a nonconducting state of the power switch element has;– by means of a voltage sensor (50), which a to a voltage at the dc input (34), which is proportional to the first voltage is detected;– the one hand, from a voltage sensor (51), which a to a voltage at the antenna feed (35), which is proportional to the second voltage is detected;– a to the control input and to the voltage sensors (50; 51) coupled control (22), wherein the controller (22) the power switch element in the conductive state, which scans the first and second voltage, in response to said first and second voltage, a voltage difference is calculated, the voltage difference with an upper and a lower limit value compares, a short-circuit failure, if the voltage difference..