Study of Thermal Noise Generated in a Vivaldi Antenna Using the Improved Wheeler Cap Method

Author

Belostotski, Leonid ; Sutinjo, Adrian ; Johnston, Ronald H. ; Okoniewski, Michal ; Petursson, Michael A. ; Burgess, Tom

Author_Institution

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

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

1047

Lastpage

1050

Abstract

We analyze sources of inefficiency in a single Vivaldi antenna. The analysis is based on simulations of antenna radiation efficiencies and measurement data obtained via the Improved Wheeler Cap (IWC) method. The accuracy of the IWC method is established in full-wave simulation (HFSS) by comparison to metal loss computation in method-of-moment simulation (FEKO) and efficiency calculation of a lossless Vivaldi antenna. These results suggest reliability of the IWC method. The method is then used to investigate sources of losses in the antenna.

Keywords

antenna radiation patterns; method of moments; thermal noise; IWC method; antenna radiation efficiency; full-wave simulation; improved wheeler cap method; measurement data; metal loss computation; method-of-moment simulation; single Vivaldi antenna; thermal noise; Antenna measurements; Antennas; Dielectric losses; Metals; Noise; Temperature measurement; Antenna measurements; Vivaldi antennas; radio astronomy;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2169769

Filename

6029409