STUBBY, MULTI-BAND, ANTENNA HAVING A LARGE-DIAMETER HIGH FREQUENCY RADIATING/RECEIVING ELEMENT SURROUNDING A SMALL-DIAMETER LOW FREQUENCY RADIATING/RECEIVING ELEMENT

摘要

An antenna is responsive to both a low frequency band and a high frequency band. The antenna includes a metal connector and a hollow insulating tube that is supported by the metal connector. A relatively large diameter metal coil that is responsive to the low frequency band is coiled about an outer surface of the insulating tube, and one end of this coil is connected to the metal connector. A relatively small diameter metal coil that is responsive to the high frequency band is coiled adjacent to an inner surface of the insulating tube, and one end of this coil is connected to the metal connector. A metal disk is mounted on and electrically connected to an opposite end of the small diameter coil. A sheath of dielectric material axially compresses the two coils against the metal connector and also provides an outer cover for the antenna.