Ultra-wideband horn antenna with abrupt radiator

Details Ultra-wideband horn antenna with abrupt radiator Ultra-wideband horn antenna with abrupt radiator

1996-07-19

1998-05-19

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Wave guide type

H01Q 1302

Patent

active

057541442

ABSTRACT:
An ultra-wideband horn antenna transmits and receives impulse waveforms for short-range radars and impulse time-of flight systems. The antenna reduces or eliminates various sources of close-in radar clutter, including pulse dispersion and ringing, sidelobe clutter, and feedline coupling into the antenna. Dispersion is minimized with an abrupt launch point radiator element; sidelobe and feedline coupling are minimized by recessing the radiator into a metallic horn. Low frequency cut-off associated with a horn is extended by configuring the radiator drive impedance to approach a short circuit at low frequencies. A tapered feed plate connects at one end to a feedline, and at the other end to a launcher plate which is mounted to an inside wall of the horn. The launcher plate and feed plate join at an abrupt edge which forms the single launch point of the antenna.

REFERENCES:
patent: 2307011 (1943-01-01), Barrow
patent: 2719230 (1955-09-01), Smoll et al.
patent: 3274602 (1966-09-01), Randall et al.
patent: 3757345 (1973-09-01), Carver
patent: 4760403 (1988-07-01), Grim
patent: 5440316 (1995-08-01), Podgorski et al.

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