Multiband television/communications antenna

Details Multiband television/communications antenna Multiband television/communications antenna

1987-12-23

1989-09-19

Hille, Rolf

Communications: radio wave antennas

Antennas

With vehicle

343725, H01Q 132

Patent

active

048685771

ABSTRACT:
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.

REFERENCES:
patent: 2555857 (1951-06-01), Nelson et al.
patent: 4095229 (1978-06-01), Elliott
patent: 4635066 (1987-01-01), St. Clair et al.

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