Multifrequency phased array aperture

Details Multifrequency phased array aperture Multifrequency phased array aperture

1991-04-04

1993-12-14

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Plural separate diverse type

343771, H01Q 2100, H01Q 1300

Patent

active

052707245

ABSTRACT:
A shared antenna aperture has two or more sets of interleaved antenna elements. Open-ended waveguides are used for the elements of the higher frequency antenna array and are selectively interconnected to form the elements of the other sharing antenna arrays. Plates are used to short walls of adjacent waveguides to form notch antennas. Coaxial feeds are used to excite the notches at a lower frequency than the waveguides. In one embodiment, the notch antennas formed of two interconnected waveguides operate at half the frequency of the waveguides. To form a third sharing antenna, four adjacent waveguides are interconnected to form notch antenna elements and these notches are excited at an even lower frequency.

REFERENCES:
patent: 4141012 (1979-02-01), Hockham et al.
patent: 4243990 (1981-01-01), Nemit et al.
patent: 4782345 (1988-11-01), Landt
patent: 4839662 (1989-06-01), Wood
patent: 4839663 (1989-06-01), Kurtz
patent: 5023623 (1991-06-01), Kreinheder et al.
patent: 5028891 (1991-07-01), Lagerlof

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