Ultra-wideband horn antenna with abrupt radiator
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.
- Inventors:
-
- Livermore, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 871562
- Patent Number(s):
- 5754144
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01Q - ANTENNAS, i.e. RADIO AERIALS
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 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; /343/
Citation Formats
McEwan, Thomas E. Ultra-wideband horn antenna with abrupt radiator. United States: N. p., 1998.
Web.
McEwan, Thomas E. Ultra-wideband horn antenna with abrupt radiator. United States.
McEwan, Thomas E. Thu .
"Ultra-wideband horn antenna with abrupt radiator". United States. https://www.osti.gov/servlets/purl/871562.
@article{osti_871562,
title = {Ultra-wideband horn antenna with abrupt radiator},
author = {McEwan, Thomas E},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1998},
month = {Thu Jan 01 00:00:00 EST 1998}
}