초록 ▼

A unitary, multiband and dual polarity mobile antenna (A) is disclosed for vehicles and the like which includes a television antenna (B) having a horizontally polarized radiation pattern and a 2-way communications antenna (C) having a vertically polarized radiation pattern. A null current point (50)

A unitary, multiband and dual polarity mobile antenna (A) is disclosed for vehicles and the like which includes a television antenna (B) having a horizontally polarized radiation pattern and a 2-way communications antenna (C) having a vertically polarized radiation pattern. A null current point (50) is created on communications antenna (C) by a phasing coil (34) which is intersected by a horizontal plane (52) in which television antenna (B) lies. This reduces cross-coupling, cross-polarization, and interference between the two antenna during operation. Horizontal television antenna (B) includes a J-folded, generally boomerang shaped, curved antenna configured to have a radiating element (20) and a half radiating element (22). These elements together form a third radiating element providing operation at three resonant frequencies.

대표청구항 ▼

A unitary multiband antenna for a vehicle having plural antennas operating at different frequencies and polarities comprising: a housing adapted for mounting to said vehicle; a television receiving antenna carried within said housing generally in a horizontal plane operating within a band of televis

A unitary multiband antenna for a vehicle having plural antennas operating at different frequencies and polarities comprising: a housing adapted for mounting to said vehicle; a television receiving antenna carried within said housing generally in a horizontal plane operating within a band of television frequencies, and said television antenna having a horizontally polarized radiation pattern; a 2-way communications antenna for transmitting and receiving communication signals carried in a vertical plane by said housing having a vertically polarized radiation pattern; and said television antenna including a generally J-shaped configuration having a first element radiating on a high band of VHF frequencies, a second antenna element radiating in a band of UHF frequencies, and said first and second elements operating together as a third radiating element to produce radiation in a low band of VHF frequencies.