Ultra-wideband horn antenna with abrupt radiator

Patent · Thu Jan 01 00:00:00 EST 1998

OSTI ID:871562

McEwan, Thomas E ^[1]

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1. Livermore, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5754144
• OSTI ID: 871562
• Country of Publication: United States
• Language: English

Related Subjects

ultra-wideband
horn
antenna
abrupt
radiator
transmits
receives
impulse
waveforms
short-range
radars
time-of
flight
systems
reduces
eliminates
various
sources
close-in
radar
clutter
including
pulse
dispersion
ringing
sidelobe
feedline
coupling
minimized
launch
element
recessing
metallic
frequency
cut-off
associated
extended
configuring
drive
impedance
approach
circuit
frequencies
tapered
feed
plate
connects
launcher
mounted
inside
wall
join
edge
forms
single
horn antenna
inside wall
various sources
ultra-wideband horn
pulse waveforms
pulse waveform
antenna transmits
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