Title :
Downsizing of LPDA for radiation EMI measurement
Author :
Nagasawa, M. ; Kurosawa, Y. ; Suga, R. ; Hashimoto, O. ; Yasuzumi, T. ; Hasegawa, Y.
Author_Institution :
Department of Electrical Engineering and Electronics, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara-shi, Kanagawa 252-5258, Japan
Abstract :
In this paper, a log-periodic dipole antenna array (LPDA) was downsized by using chip inductors and dielectric substrate for outdoor measurement. It was found that the directivity of a dipole antenna was decreased with increase of the shortening ratio of the element. A three-element LPDA was designed using the downsized dipole element. The reflection characteristics of the fabricated LPDA met the target value between 282 MHz – 385 MHz. The fabricated LPDA had about half length compared with that of original one, and the flat gain of from −0.46 to 1.89 dBi were obtained.
Keywords :
Antenna measurements; Antenna radiation patterns; Dipole antennas; Gain; Inductors; Noise; Reflection; LPDA; dielectric substrate; downsizing; inductor;
Conference_Titel :
Microwave Conference (APMC), 2014 Asia-Pacific
