On the Wheeler cap measurement of the efficiency of microstrip antennas

Author

Choo, Hosung ; Rogers, Robert ; Ling, Hao

Author_Institution

Sch. of Electron. & Electr. Eng., Hongik Univ., Seoul, South Korea

Volume

53

Issue

7

fYear

2005

fDate

7/1/2005 12:00:00 AM

Firstpage

2328

Lastpage

2332

Abstract

The Wheeler cap method for measuring the efficiency of microstrip antennas is revisited. First, we show that the parallel RLC model is a more appropriate model to use than a series one for the microstrip antennas under consideration. Our results are verified by numerical simulation using ENSEMBLE. Second, the role of the interior cavity modes is investigated and a reduced-height Wheeler cap is proposed. Finally, the Wheeler cap method is applied to measure the efficiency of miniaturized microstrip antennas designed using genetic algorithms.

Keywords

RLC circuits; genetic algorithms; microstrip antennas; numerical analysis; ENSEMBLE; cavity mode; genetic algorithm; miniaturized microstrip antenna efficiency; numerical simulation; parallel RLC model; reduced-height Wheeler cap measurement; Algorithm design and analysis; Antenna measurements; Antennas and propagation; Circuit testing; Electrons; Genetic algorithms; Microstrip antennas; Numerical simulation; RLC circuits; Slot antennas; Antenna efficiency; Wheeler cap; efficiency measurement; microstrip antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2005.850758

Filename

1461562