A TBH antenna with parasitic element for bandwidth enhancement

Author

Çelebi, Adem ; Wong, Thomas ; Kenkel, Mark

Author_Institution

Dept. of Electr. & Comput. Eng., Illinois Inst. of Technol., Chicago, IL, USA

fYear

2012

fDate

8-14 July 2012

Firstpage

1

Lastpage

2

Abstract

A Transverse Bilateral Helical (TBH) antenna with parasitic element for bandwidth enhancement is presented. A parasitic helical structure with a smaller radius is placed within the TBH antenna to obtain a second resonance close to the main antenna´s resonance for an increased bandwidth. The new structure´s dimensions are chosen to have the same ka=0.42 value with the unloaded TBH antenna. Antenna structure is modeled and simulated by HFSS©. Measurement results indicate that an enhanced VSWR 6:1 bandwidth of 131MHz is obtained using lower dielectric constant and loss tangent core material. In addition, the input impedances for each of the resonances are higher than the original TBH antenna input impedance, thus minimizing the need for input matching network.

Keywords

UHF antennas; helical antennas; HFSS; TBH antenna; VSWR; bandwidth 131 MHz; bandwidth enhancement; dielectric constant; input impedances; input matching network; loss tangent core material; parasitic element; parasitic helical structure; transverse bilateral helical antenna; Antenna measurements; Bandwidth; Dielectric constant; Dielectric measurements; Helical antennas; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE

Conference_Location

Chicago, IL

ISSN

1522-3965

Print_ISBN

978-1-4673-0461-0

Type

conf

DOI

10.1109/APS.2012.6349185

Filename

6349185