Vivaldi Antennas for Microwave Imaging: Theoretical Analysis and Design Considerations

Author

Chiappe, Marco ; Gragnani, Gian Luigi

Author_Institution

Dept. of Biophys. & Electron. Engineering, Genova Univ.

Volume

55

Issue

6

fYear

2006

Firstpage

1885

Lastpage

1891

Abstract

The geometrical and electrical features of the Vivaldi antenna are studied in the light of the frequency-independent antenna theory. A scaling principle is derived for the exponential tapering of the antenna, and a closed-form model for the current distribution is provided. Such theoretical results are in good agreement with several numerical simulations performed by using the NEC2 code. Furthermore, a practical feeding system, based on a double-Y balun, is developed and tested to obtain a more systematic approach to the design of the aforesaid antennas

Keywords

antenna theory; baluns; broadband antennas; current distribution; microwave imaging; NEC2 code; Vivaldi antennas; broadband antennas; closed-form model; current distribution; double-Y balun; exponential antenna tapering; frequency-independent antenna theory; microwave imaging; practical feeding system; Antenna feeds; Antenna theory; Current distribution; Frequency; Image analysis; Impedance matching; Microwave imaging; Numerical simulation; System testing; Vivaldi antennas; Broadband antennas; Vivaldi aerial; double-Y balun; frequency-independent antennas; microwave imaging;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2006.884289

Filename

4014689