Multifunction structurally integrated VHF-UHF aircraft antenna s

Communications: radio wave antennas – Antennas – With aircraft

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Details

343767, 343770, H01Q 128, H01Q 1310

Patent

active

058253327

ABSTRACT:
An antenna system utilizing an electrically conductive portion (16) of an aircraft structure to radiate and receive very-high-frequency (VHF) and ultra-high-frequency (UHF) radio signals over a wide frequency range without the need for an active tuner to accommodate frequency changes. An antenna element (22) is housed in a tail fin endcap section (20) and is positioned and shaped to form an elongated notch (26) between one edge (24) of the element itself and one adjacent edge (18) of an electrically conductive tail fin (16). The notch (26) is uniform over part of its length and is flared to a wider spacing over the remainder of its length. A feed point (30) along the notch (26) is selected for optimum performance. Matching electronics (14) couple the antenna system to a transceiver (15), which can operate either in a VHF/FM band, or in a UHF band, or in a VHF/AM band. The antenna system provides relatively good gain over the frequency range and provides a practically omnidirectional radiation pattern.

REFERENCES:
patent: 2701307 (1955-02-01), Cary
patent: 2781512 (1957-02-01), Robinson, Jr.
patent: 2908000 (1959-10-01), Robinson, Jr.
patent: 3086204 (1963-04-01), Alford

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