An automatic tracking adjustment device for a bandpass filter, an automatic tracking adjustment method, and a wireless communication device equipped with the device.

摘要

PROBLEM TO BE SOLVED: To provide an automatic tracking adjustment unit for a bandpass filter, which allows for automatic tracking adjustment of single radio communication equipment without using any special jig, while shortening adjustment time inexpensively.;SOLUTION: An automatic tracking adjustment unit 1 includes a transmission function section 2, a bandpass filter 3, a reception function section 4, a control section 5, and a switch for switching normal time and adjustment time, provided in radio communication equipment. The control section 5 stores an adjustment program, and controls the transmission function section 2 to generate an adjustment signal of a predetermined frequency, in each of predetermined multiple frequency bands during adjustment, to pass the adjustment signal through the bandpass filter 3 for each of multiple set capacitance values of a capacitor in a predetermined range of capacitance value, to record the signal level in the reception function section 4, and to determine the set capacitance value when the signal level is maximum, among the recorded signal levels, as the adjustment value at an adjustment frequency.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT