Effects of Wheeler cap loss on wideband antenna efficiency measurement results

Author

Lu, Y. ; Huang, Y. ; Chattha, H.T.

Author_Institution

Dept. of Electr. Eng. & Electron., Univ. of Liverpool, Liverpool

fYear

2009

fDate

2-4 March 2009

Firstpage

1

Lastpage

4

Abstract

Recently, Wheeler cap method was extended to measure wideband antennas. This paper presents an investigation on the effects of the loss of wheeler cap on antenna efficiency measurement results. Two caps/cavities (one large and one small) are employed for this study and numerical simulation is also conducted to aid the analysis. Both the experimental and numerical results show the loss due to the imperfection of the cavity can cause a serious problem for obtaining an accurate result. How to eliminate the effects of the cavity loss and improve the measurement accuracy for the wheeler extended method is an issue to be resolved.

Keywords

antenna radiation patterns; broadband antennas; numerical analysis; numerical simulation; wheeler cap loss; wideband antenna efficiency measurement; Antenna measurements; Broadband antennas; Electric variables measurement; Equations; Frequency; Loss measurement; Power measurement; Reflector antennas; Resonance; Ultra wideband antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antenna Technology, 2009. iWAT 2009. IEEE International Workshop on

Conference_Location

Santa Monica, CA

Print_ISBN

978-1-4244-4395-6

Electronic_ISBN

978-1-4244-4396-3

Type

conf

DOI

10.1109/IWAT.2009.4906923

Filename

4906923