| 摘要 |
PROBLEM TO BE SOLVED: To prevent a sleeve antenna from being made into a large diameter, to facilitate its assembling and to improve electrical characteristic. SOLUTION: An outer conductor pipe 25 is located in the center part of a connector joint 22, and also, a Sperrtopf 24 is inserted to its outer periphery. The tip of the outer conductor pipe 25 is connected to a second radiator 28 with a pad B, and the core 27 in the center of the outer conductor pipe 25 to a first radiator 32 with a pad A31. A dipole antenna for a telephone frequency band is formed with the first radiator 32 and the second radiator 28. The upper terminal of the first radiator 32 is connected to a joint B on which a whip antenna is mounted via a trap coil 33. An AM band is received with the whip antenna and a sleeve antenna part 12, which also forms an antenna resonating with an FM frequency band. |
