Annular slot antennas on extended hemispherical dielectric lenses

Author

Colomb, F. ; Hur, K. ; Stacey, W. ; Grigas, M.

Author_Institution

Adv. Device Center, Raytheon Co., Andover, MA, USA

Volume

3

fYear

1996

fDate

21-26 July 1996

Firstpage

2192

Abstract

Annular slot antennas (ASA) at 35 GHz and 94 GHz have been analyzed by measuring their input impedance, computing radiation patterns, and extracting therefrom quantities relevant to quasi-optical systems. A full-wave analysis in the spectral domain allows the rigorous modeling of the fields in the several dielectric layers that form the antenna and of the radiation patterns. A technique for equalizing the E and H plane beamwidths is presented. One design at 94 GHz indicates a directivity of 22 dB, Gaussian coupling efficiency of 84 percent, a sidelobe level of 17 dB, and intensity front-to-back ratio of 30 dB.

Keywords

antenna radiation patterns; directive antennas; electric impedance; loop antennas; millimetre wave antennas; slot antennas; spectral-domain analysis; 35 GHz; 94 GHz; E plane beamwidth; Gaussian coupling efficiency; H plane beamwidth; annular slot antennas; design; dielectric layers; directivity; extended hemispherical dielectric lenses; full-wave analysis; input impedance; intensity front-to-back ratio; quasi-optical systems; radiation patterns; sidelobe level; spectral domain; Antenna measurements; Dielectric measurements; Feeds; Gallium arsenide; Impedance measurement; Lenses; Polarization; Polyimides; Radio frequency; Slot antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1996. AP-S. Digest

Conference_Location

Baltimore, MD, USA

Print_ISBN

0-7803-3216-4

Type

conf

DOI

10.1109/APS.1996.550045

Filename

550045