| 摘要 |
PROBLEM TO BE SOLVED: To obtain an antenna in matching with a selected frequency band within an operating frequency band for a radio communication equipment or the like. SOLUTION: A tuning coil 5 is wound on a coil bobbin 7 and a coil guide section and a contact 8 are integrated with a coil container 4. A torque of a motor 1 is delivered to a punch hole guide 3 and the coil bobbin 7 via a drive transmission member 2. Then the contact 8 is skided by the torque of the motor 1 and the antenna is tuned with an optional frequency by a radiation part of the coil container 4, a tuning coil 5 and an antenna rod 9 in the case of an HF band. The antenna is tuned with an optional frequency with the radiation part of the coil container 4 in the case of a VHF band or a UHF band. |
