A Low Cross-Polarization Smooth-Walled Horn With Improved Bandwidth

Author

Zeng, Lingzhen ; Bennett, Charles L. ; Chuss, David T. ; Wollack, Edward J.

Author_Institution

Dept. of Phys. & Astron., Johns Hopkins Univ., Baltimore, MD, USA

Volume

58

Issue

4

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

1383

Lastpage

1387

Abstract

Corrugated feed horns offer excellent beam symmetry, main beam efficiency, and cross-polar response over wide bandwidths, but can be challenging to fabricate. An easier-to-manufacture smooth-walled feed is explored that approximates these properties over a finite bandwidth. The design, optimization and measurement of a monotonically-profiled, smooth-walled scalar feedhorn with a diffraction-limited ~14?? FWHM beam is presented. The feed was demonstrated to have low cross polarization (< -30 dB) across the frequency range 33-45 GHz (30% fractional bandwidth). A power reflection below -28 dB was measured across the band.

Keywords

antenna feeds; electromagnetic wave polarisation; horn antennas; millimetre wave antennas; cross-polarization smooth-walled horn; frequency 33 GHz to 45 GHz; monotonically-profiled scalar feedhorn; smooth-walled scalar feedhorn; Antenna measurements; Apertures; Bandwidth; Design optimization; Diffraction; Electromagnetic waveguides; Extraterrestrial measurements; Feeds; Frequency; Horn antennas; NASA; Optical reflection; Polarization; Feeds; horn antennas; millimeter-wave antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2010.2041318

Filename

5398898