| 摘要 |
A rod antenna element (11) is connected at its lower end to one end of a coaxial impedance converter, the other end of which is connected to a feeder (14). A coil antenna element (16) is capacitively coupled to the rod antenna element to provide a double resonance characteristic. When held at its retracted position, the rod antenna element, inserted in an outer conductor of the coaxial impedance converter, may preferably form an inner conductor larger in diameter than that when the rod antenna element is at its extended-out position, and the rod antenna element is connected to a coil antenna element with a low impedance. |
