Common aperture isolated dual frequency band antenna

Details Common aperture isolated dual frequency band antenna Common aperture isolated dual frequency band antenna

1995-06-06

1997-04-08

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Spiral or helical type

H01Q 136

Patent

active

056192185

ABSTRACT:
An antenna comprising a substrate, and low band and high band opposite sense spiral antennas formed on the substrate to provide for a common aperture isolated dual frequency band antenna. The high band spiral antenna is formed adjacent the center of the substrate while the low band spiral antenna is formed adjacent the periphery of the substrate. The high frequency end of the low band antenna is truncated at the low frequency end of the high band antenna, and the low frequency end of the high frequency antenna is truncated at the high frequency end of the low band antenna 21 to provide for mutual isolation between the frequency bands.

REFERENCES:
patent: 3017633 (1962-01-01), Marston et al.
patent: 3135960 (1964-06-01), Kaiser
patent: 3192531 (1965-06-01), Cox et al.
patent: 3381371 (1968-05-01), Russell
patent: 3787871 (1974-01-01), Reese
patent: 4032921 (1977-06-01), Sikina et al.
patent: 4087821 (1978-05-01), Phelan
patent: 4573212 (1986-02-01), Lipsky

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