Double omni-directional antenna

Details Double omni-directional antenna Double omni-directional antenna

1974-10-23

1976-03-16

Gensler, Paul L.

Communications: radio wave antennas

Antennas

With aircraft

343729, 343791, 343830, H01Q 128, H01Q 100, H01Q 904, H01Q 938

Patent

active

039450139

ABSTRACT:
A double omni-directional antenna for use with a transponder is disclosed allowing simultaneous operation within two different frequency bands. A double coaxial line is provided having outer, central, and inner concentric conductors. The outer and central conductors form a coaxial feed for a lower frequency antenna and the central and inner connectors form a coaxial feed for a high frequency antenna. The higher frequency antenna is located directly above the lower frequency antenna and each is either a unipole for vertically polarized radiation or a slot radiator for horizontally polarized radiation.

REFERENCES:
patent: 2479227 (1949-08-01), Gilbert
patent: 2480186 (1949-08-01), Gilbert
patent: 2735093 (1956-02-01), Krausz et al.
patent: 2821709 (1958-01-01), Fucci
patent: 3019437 (1962-01-01), Hoadley
patent: 3739390 (1973-06-01), Poppe, Jr. et al.

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