Title :
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
fDate :
7/1/2005 12:00:00 AM
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2005.850758
