skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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:
 [1]
  1. (Livermore, CA)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
871562
Patent Number(s):
US 5754144
Assignee:
Regents of University of California (Oakland, CA) LLNL
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. doi:. 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}
}

Patent:

Save / Share: