Patent ID: 7174142
Filing Date: 2007-02-06
Classification: H01Q,H04B

Abstract:
1. A receiver having a built-in antenna comprising: signal processing means that processes a signal received via the antenna and produces data related to the received signal; impedance-matching means having a variable-capacitance diode and connected between the antenna and the signal processing means for matching an impedance thereof to an impedance of the antenna; voltage producing means that produces a reverse bias voltage applied to the variable-capacitance diode; operation mode setting means that sets a operation mode either one of an adjustment mode and a normal mode; data storing means that stores data, including adjustment data used for the impedance matching performed by the impedance-matching means; and control means that determines the operation mode set by the operation mode setting means, produces the adjustment data by determining a level of the reverse bias voltage based on the data produced by the signal processing means when the operation mode is set to the adjustment mode, stores the adjustment data in the data storing means, and controls the voltage producing means based on the adjustment data when the operation mode is set to the normal mode.