Method of feeding electromagnetic power from an antenna element

Details Method of feeding electromagnetic power from an antenna element Method of feeding electromagnetic power from an antenna element

1989-07-05

1990-08-07

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Switching between antennas and lines

342361, 343705, 343756, H01Q 324, H01Q 128

Patent

active

049471821

ABSTRACT:
A method of feeding out field power from a circularly polarized antenna (2), mounted on a conductive aircraft surface (1). All power is normally fed out in circular polarization to the receiver, irrespective of the elevation angle (.theta.) and the azimuth angle (.alpha.). For increasing the antenna amplification at elevation angles .theta. greater than or approximately equal to 60.degree., where substantially only the vertical polarization can be seen, it is proposed in accordance with the method that all power is fed out in linear polarization with the aid of a polarization switch (4).

REFERENCES:
patent: 3215957 (1965-11-01), Dantzig et al.
patent: 3938158 (1976-02-01), Birch et al.
patent: 4051474 (1977-09-01), Mack et al.

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