Patent ID: 8380152

Claim:
An asymmetric gain communication device, comprising: a transmission antenna for sending emission signals; at least one receiving antennas for receiving communication signals emitted from another communication device, the antenna gains of the receiving antennas being greater than the antenna gain of the transmission antenna; a transceiving unit coupled to the transmission antenna and coupled to the receiving antennas via a selector, for generating the emission signals for the transmission antenna to send and for receiving the communication signals of each of the receiving antennas during initialization; a recording unit coupled to the transceiving unit for detecting the communication signals received by each of the receiving antennas and recording the corresponding communication quality; a computing unit coupled to the recording unit for comparing the communication quality and selecting one of the receiving antennas according to the communication quality and the antenna gain thereof; and a controlling unit for switching the selector according to the selected receiving antenna so that the selector maintains electrical connection with the selected receiving antenna for the transceiving unit to continuously receiving the communication signals from the selected receiving antenna.