Patent ID: 7016660

Claim:
An antenna diversity receiving system comprising: a receiver having a multipath detector coupled to a pulse generator for generating a pulse signal at the detection of multipath interference; an antenna device including a plurality of FM antennas and a controllable switching circuit for sequentially switching through one of said plurality of FM antennas via an antenna cable to the receiver upon reception of a switching control signal; and wherein the receiver includes a pulse shaper coupled to the pulse generator to convert the pulse signal of the pulse generator into a pulse signal pair having a first signal pulse followed by a second signal pulse having a signal polarity opposite to the signal polarity of the first signal pulse, the pulse signal pair having a waveform varying symmetrically around a reference level, the pulse signal pair having no DC signal energy and being supplied through the antenna cable to the antenna device; and wherein the controllable switching circuit determines the reception of the switching control signal by detecting the occurrence of the pulse signal pair.