UWB Dual-Linear Polarization Dielectric Horn Antennas as Reflector Feeds

Author

Lee, Kwan-Ho ; Chen, Chi-Chih ; Lee, Robert

Author_Institution

AGC Automotive America R&D Inc, Ypsilanti, MI

Volume

55

Issue

3

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

798

Lastpage

804

Abstract

An ultrawide bandwidth (UWB) dielectric horn antenna (DHA) design is presented. This DHA design provides dual-linear polarization with similar Eand H-plane patterns and a near-constant beamwidth from 2 to 18 GHz. The fixed phase center makes it an excellent candidate for feeding a reflector. The DHA is composed of a resistively terminated broadband field launcher, a solid dielectric horn body, and microwave absorbers for suppressing lateral waves and back lobes. Desirable beamwidth can be achieved by choosing a specific horn angle. A design example that shows a beam aspect ratio (BAR) close to one and approximately 110-degree 10-dB beamwidth is presented. The measured results are validated by full-wave simulations with the finite difference time domain (FDTD) method

Keywords

antenna radiation patterns; dielectric-loaded antennas; electromagnetic wave polarisation; finite difference time-domain analysis; horn antennas; multifrequency antennas; reflector antenna feeds; ultra wideband antennas; 2 to 18 GHz; DHA design; FDTD; UWB dielectric horn antenna; broadband field launcher; dual-linear polarization; finite difference time domain method; full-wave simulation; microwave absorber; radiation pattern; reflector feeds; Antenna feeds; Bandwidth; Dielectric measurements; Finite difference methods; Horn antennas; Polarization; Reflector antennas; Solids; Time measurement; Ultra wideband antennas; Dielectric horn; dual-polarized antennas; feed; finite difference time domain (FDTD); ultrawide bandwidth (UWB) antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2007.891804

Filename

4120277