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Title: Broad band antennas and feed methods

Two or more Vivaldi antennas, consisting of two plates each, each with the antenna's natural impedance of approximately 100 ohms, are placed in parallel to achieve a 50 ohm impedance in the case of two antennas or other impedances (100/n ohms) for more than two antennas. A single Vivaldi antenna plate (half Vivaldi antenna) over a ground plane can also be used to achieve a 50 ohm impedance, or two or more single plates over a ground plane to achieve other impedances. Unbalanced 50 ohm transmission lines, e.g. coaxial cables, can be used to directly feed, the dual Vivaldi (four plate) antenna in a center fed angled center departure, or more desirably, a center fed offset departure configuration.
Inventors:
;
Issue Date:
OSTI Identifier:
1351814
Assignee:
Lawrence Livermore National Security, LLC LLNL
Patent Number(s):
9,627,777
Application Number:
13/572,234
Contract Number:
AC52-07NA27344
Resource Relation:
Patent File Date: 2012 Aug 10
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 24 POWER TRANSMISSION AND DISTRIBUTION

Other works cited in this record:

Double-Reflector, Double-Feed Antenna for Crossed Polarizations and Polarization Changing Devices Useful Therein
patent, September 1966

Antenna with a reflector of open construction
patent, May 1985

Broadband notch antenna
patent, June 1989

Discontinuous mobile antenna
patent, July 1990

Phased array antenna element with straight v-configuration radiating leg elements
patent, March 2002

Wideband antenna with tapered surfaces
patent, August 2004

Ultra-wideband antennas
patent, June 2005

Vivaldi antenna
patent, August 2006

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