TILT ANGLE VARIABLE ANTENNA AND EXTERNAL RECORDING MEDIUM FOR STORING TILT ANGLE CONTROL DATA

摘要

PROBLEM TO BE SOLVED: To provide a tilt angle variable antenna where the beam tilt angles of many base station antennas can be easily set/adjusted without fail.;SOLUTION: A tilt angle setting section 5 controls the beam tilt angle of a tilt angle variable antenna used for a base station of a cellular mobile communication system by using a tilt angle control signal S3. An IC card 6 being an external recording medium stores control data to set the beam tilt angle of a plurality of the base stations. When the IC card 6 is inserted to an IC card insertion port 61, a data read section 51 reads the control data of its own station. The data read section 51 displays the beam tilt angle of its own station on a tilt angle display section 53 and sends the control data to a tilt angle control section 54. The tilt angle control section 54 converts the control data into a tilt angle control signal S3 that is used to properly change the phase shift of the signal of a phase angle adjustment circuit 32 of the tilt angle variable antenna.;COPYRIGHT: (C)2002,JPO