| 摘要 |
A nondirectional antenna assembly (100), and associated method, for a radio operative at high frequencies, such as at frequencies of approximately 1.8 Gigahertz. A first antenna portion, formed of a one-half wavelength, helical winding (124) is supported at a distal side of a nonconductive whip (106). A second antenna portion, comprised of a helical winding (130) supported at a proximal side of the nonconductive whip, and a one-quarter wave helical winding (136), connected to radio circuitry of the radio transceiver, couples the first antenna portion to the radio circuitry. Because the first antenna portion (124) is positioned at a distal side of the nonconductive whip (106), shadowing occurring as a result of positioning the radio transceiver proximate to a user during operation thereof is less likely to interfere with operation of the radio transceiver. |
