Frequency-scanned antenna

Details Frequency-scanned antenna Frequency-scanned antenna

1978-07-14

1979-10-09

Moore, David K.

Communications: radio wave antennas

Antennas

Slot type

343768, 343854, H01Q 1310

Patent

active

041707788

ABSTRACT:
A ridged rectangular launching waveguide and a ridged rectangular radiating waveguide have a common length-wise wall comprised of wall segments. A wave launched at the proximal end of the launching waveguide is coupled to the radiating waveguide through passageways between the segments. A cylindrical metal rod extends through a segment to the wavepaths of the waveguides. Additionally, the ridges of the waveguides have similar notches near the rod, the rod and the notches forming similar attenuators in the wavepaths. The passageways result in a formation of a pair of three-db, ninety-degree hybrids connected back-to-back through the attenuators. The hybrids and the attenuators couple a predetermined percentage of the energy of the wave to a radiating slot in a panel at the distal end of the radiating waveguide. The remainder of the wave energy is reflected by the attenuators and coupled by the hybrids through the radiating waveguide towards the proximal end thereof.

REFERENCES:
patent: 2878472 (1959-03-01), Sterns
patent: 3324475 (1967-06-01), Milne
Skolnik, Merrill I., Radar Handbook, New York: McGraw Hill, pp. 13-10 through 13-16.

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