Design and Evaluation of a Closely Spaced Yagi Antenna Over Ground

Author

Lim, Sungkyun ; Ling, Hao

Author_Institution

Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX

fYear

2006

fDate

9-14 July 2006

Firstpage

2021

Lastpage

2024

Abstract

In this paper, we present the design of a compact Yagi antenna with very close spacing between the elements. The major problem with a Yagi with closely spaced elements is that the radiation resistance is very small, leading to poor efficiency and poor matching. We apply the folding concept to step up the radiation resistance of the antenna to 50 Omega at resonance for element spacing as close as 0.02lambda. A genetic algorithm (GA) in conjunction with the Numerical Electromagnetics Code (NEC) is used to optimize the antenna structure. The optimized antenna design is then evaluated over a lossy ground. The antenna is also compared with other conventional antennas in the same environment

Keywords

Yagi antenna arrays; antenna accessories; genetic algorithms; 50 ohm; GA; Numerical Electromagnetics Code; closely spaced Yagi antenna; compact Yagi antenna; folding concept; genetic algorithm; radiation resistance; Arm; Design optimization; Dipole antennas; Electromagnetic radiation; Genetic algorithms; Hafnium; National electric code; Reflector antennas; Resonance; Yagi-Uda antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium 2006, IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

1-4244-0123-2

Type

conf

DOI

10.1109/APS.2006.1710976

Filename

1710976