Patent ID: 8200287
Filing Date: 2012-06-12
Classification: H04B

Abstract:
1. An antenna switching method of a wireless communication system, the wireless communication system including a transmitting unit having a transmitting circuit for transmitting/receiving a signal, a plurality of transmitting antennas for transmission/reception, an antenna switch for switching any one of the plurality of the transmitting antennas to be connected to the transmitting circuit and a transmitting controller for controlling the transmitting circuit and the antenna switch, the transmitting circuit capable of transmitting a signal including a return request and transmitting/receiving another signals, and a receiving unit having a receiving circuit for transmitting/receiving a signal to/from the transmitting unit, a receiving antenna connected to the receiving circuit, and a receiving controller for controlling the receiving circuit, the receiving controller transmitting a return signal from the receiving circuit when receiving the signal including the return request from the transmitting unit, the antenna switching method comprising: a received signal intensity measuring step including a step of allowing the transmitting controller to compare the obtained received signal intensities of all the transmitting antennas and determine the transmitting antenna wherein the received signal intensity is the highest; a step of allowing the transmitting controller to operate the antenna switch so that the determined transmitting antenna wherein the received signal intensity is the highest is connected to the transmitting circuit and fix the transmitting antenna; and a step of allowing the transmitting controller to transmit signals thereafter from the transmitting circuit via the fixed transmitting antenna, wherein the transmitting antennas are arranged in a peripheral direction of a rotatable member at predetermined intervals, and the received signal intensity measuring step is performed with the rotatable member being in a stopped or in an approximately stopped state.