Accession Number : ADA114291

Title :   A 20 GHz Circularly Polarized, Fan Beam Slot Array Antenna.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Weikle,Dennis C

PDF Url : ADA114291

Report Date : 09 Mar 1982

Pagination or Media Count : 39

Abstract : An EHF waveguide slot array was developed for possible use as a receive-only paging antenna for ground mobile terminals. The design, fabrication, and measured performance of this antenna are presented. The antenna generates a circularly polarized fan beam that is narrow in azimuth and broad in elevation. When mechanically rotated in azimuth, it can receive a 20-GHz satellite transmission independent of mobile terminal direction. Azimuth plane sidelobe levels, which are typically -40 dB from the main lobe, provide for discrimination against ground and airborne jammers. (Author)

Descriptors :   *Slot antennas, *Antenna arrays, *Antenna radiation patterns, Extremely high frequency, Terminals, Jamming, Mobile, Elevation, Arrays, Airborne, Gain, Polarization, Ground level, K band

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE