EHF SATCOM monopulse antenna

Author

Thomas, D.

Author_Institution

Datron Syst. Inc., Simi Valley, CA, USA

fYear

1989

fDate

15-18 Oct 1989

Firstpage

325

Abstract

The author describes a coaxial dual band monopulse feed design specifically tailored to the EHF (extremely high-frequency/SATCOM frequency bands. The device utilizes low-loss waveguide circuits throughout and employs a corrugated feed horn that provides symmetrical primary patterns with steeply tapered skirts. The dimensions in the horn throat/coaxial section were empirically adjusted for good primary patterns in the 45 GHz band. Fortuitously, this also provided good primary performance in the 21 GHz band. In the autotrack mode, the phase and amplitude of the error channel are compared with those of the data channel to obtain tracking error magnitude and sense. The feed and test antenna geometries are described. Measured performance demonstrating nominal efficiencies in the 55%-60% range, along with good pattern, phase, and impedance match, is presented

Keywords

antenna feeders; antenna radiation patterns; satellite antennas; 21 GHz; 45 GHz; 55 to 60 percent; EHF; SATCOM antenna; SHF; amplitude; autotrack mode; coaxial dual band monopulse feed design; corrugated feed horn; data channel; efficiencies; error channel; extremely high-frequency; feed geometry; impedance match; low-loss waveguide circuits; measured performance; phase; satellite antenna; symmetrical primary patterns; test antenna geometry; tracking error magnitude; Antenna feeds; Antenna measurements; Circuits; Coaxial components; Dual band; Frequency; Geometry; Impedance measurement; Phase measurement; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1989. MILCOM '89. Conference Record. Bridging the Gap. Interoperability, Survivability, Security., 1989 IEEE

Conference_Location

Boston, MA

Type

conf

DOI

10.1109/MILCOM.1989.103948

Filename

103948