Patent ID: 8175559
Filing Date: 2012-05-08
Classification: A61B,H04B

Abstract:
1. A receiving apparatus for receiving transmitted information transmitted from a moving transmitting apparatus through a selected and switched feeder and a receiving antenna, the receiving apparatus comprising: a selecting/switching unit that selects and switches one of a plurality of feeders connected to a plurality of receiving antennas, respectively; a detective selecting/switching unit that branches the plurality of feeders near the selecting/switching unit, respectively, and selects and switches one of the branched feeders; a grounding unit, provided between each of the feeders and each of the receiving antennas, that grounds each of the feeders; an open-circuit detecting unit that applies a direct-current voltage to the feeder selected and switched by the detective selecting/switching unit through a constant-current source, and that detects whether an open-circuit occurs in the selected and switched feeder based on whether a voltage of the feeder is equal to a ground voltage; and a control unit that controls the detective selecting/switching unit to perform selection and switching, and makes the open-circuit detecting unit to detect an open-circuit synchronously with the control over the selection and switching of the detective selecting/switching unit.