Accession Number:

ADA426094

Title:

Design and Measurement of COBRA Lens Antenna Prototypes for HPM Effects Testing Applications

Descriptive Note:

Interim rept. 1 Mar 2004-31 Mar 2004

Corporate Author:

VOSS SCIENTIFIC LLC ALBUQUERQUE NM

Personal Author(s):

Report Date:

2004-04-01

Pagination or Media Count:

26.0

Abstract:

For high power microwave susceptibility effects testing there is considerable interest in antennas that are high power capable, HPM source compatible and which radiate a broad, circularly polarized main beam. We have shown previously that the Coaxial Beam-Rotating Antenna COBRA Lens exhibits these properties, in theory. The COBRA Lens antenna transforms an azimuthally symmetric aperture field distribution, of the type common to many HPM sources, to a form that produces a centrally peaked radiation pattern with lines or circular polarization. The large aperture allow it to accommodate high power. The design, numerical simulation, and for the first time the measurement of two COBRA Lens antenna prototypes are summarized in this note. The resulting radiated patterns exhibit moderate directivity that makes them ideal for susceptibility testing applications where wide area coverage is desired. Finally, a brief discussion of the value of HPM susceptibility with circular polarization is provided.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE