Dielectric-filled slotline bowtie antenna for breast cancer detection

Author

Shannon, C.J. ; Fear, E.C. ; Okoniewski, M.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Calgary, Alta., Canada

Volume

41

Issue

7

fYear

2005

fDate

3/31/2005 12:00:00 AM

Firstpage

388

Lastpage

390

Abstract

An ultra-wideband dielectric-filled antenna has been designed for the purpose of breast cancer detection. The antenna geometry is a modified version of a slotline bowtie hybrid, which is immersed in a dielectric medium, and fed with an integrated ultra-wideband balun. Simulations were performed on both the balun and the antenna separately. The antenna had a simulated time domain near-field beamwidth of 32°. A return loss of 10 dB was obtained from 2.5 to 9 GHz, and 5 dB from 1 to 10 GHz. Both bandwidths were slightly smaller than simulated. A prototype was constructed and feasibility tests were performed on tumour models immersed in a breast phantom material. Measurements demonstrate detection of a 7 mm diameter tumour at a depth of 4 cm from the aperture.

Keywords

cancer; slot antennas; slot lines; tumours; 1 to 10 GHz; 10 dB; 2.5 to 9 GHz; 4 cm; 5 dB; 7 mm; antenna geometry; breast cancer detection; breast phantom material; dielectric medium; dielectric-filled antenna; feasibility tests; slotline bowtie antenna; slotline bowtie hybrid; tumour models; ultrawideband balun;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:20057336

Filename

1421217