Frequency-Scaled UWB Inverted-Hat Antenna

Author

Zhao, Jing ; Chen, Chi-Chih ; Volakis, John L.

Author_Institution

Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA

Volume

58

Issue

7

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

2447

Lastpage

2451

Abstract

A novel ultrawideband (UWB) antenna referred to as the inverted-hat antenna (IHA) is described. Specifically, the paper provides a systematic approach to generate a frequency-scaled IHA structure subject to aperture width and height constraints. An experimental verification is also given. The proposed compact wideband antenna exhibits frequency-independent behavior by introducing a moderate number of appropriately scaled elliptical segments and by controlling the outer surface growth profile. A modified seven-ellipse IHA is demonstrated in this paper to provide a 10:1 impedance bandwidth with satisfactory radiation properties. The simulation and measurement results are in reasonably good agreement.

Keywords

antenna radiation patterns; ultra wideband antennas; frequency-scaled UWB inverted-hat antenna; modified seven-ellipse inverted-hat antenna; ultrawideband antenna; Antenna measurements; Apertures; Bandwidth; Broadband antennas; Electrical capacitance tomography; Feeds; Frequency; Iron; Spirals; Surface impedance; Ultra wideband antennas; Ultra wideband technology; Frequency independent antennas; ultrawideband (UWB) antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2010.2048866

Filename

5454295