Patent ID: 8781525
Filing Date: 2014-07-15
Classification: H04B

Abstract:
1. A communication terminal device including a broadcast receiver for receiving a broadcast signal inputted through a reception path including an antenna, and a communicator for transmitting and receiving a wireless signal, comprising: a filter configured to pass a frequency band of the broadcast signal received by the broadcast receiver; a transmission power detector for detecting a transmission power of the wireless signal transmitted from the communicator and generating a transmission power level indicating the transmission power; a field strength detector for detecting a received field strength of the broadcast signal received by the broadcast receiver; a base voltage generator for generating as a comparison level a base voltage for a transmission power of a wireless signal transmitted from the communicator corresponding to the received field strength detected by the field strength detector, based on a prestored relationship between a received field strength of a broadcast signal received by the broadcast receiver and a comparison level beyond which a transmission power of a wireless signal transmitted from the communicator suppresses sensitivity of the broadcast receiver; a judging unit for judging whether or not the transmission power of the wireless signal transmitted from the communicator causes suppression of sensitivity in the broadcast receiver based on whether or not the transmission power level generated by the transmission power detector exceeds the comparison level generated by the base voltage generator; and a filter controller for inserting the filter into the reception path of the broadcast receiver when judged by the judging unit that the transmission power causes suppression of sensitivity and removing the filter from the reception path of the broadcast receiver when judged by the judging unit that the transmission power does not cause suppression of sensitivity.