Development of Miniaturization Flexible Printed and Multi-Band Antennas

• Main Authors: Jia-Hung Hsiao, 蕭家宏
• Other Authors: 黃榮堂、施勝雄
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/mzsp5j

碩士 === 國立臺北科技大學 === 機電整合研究所 === 96 === The design of miniaturized antennas will become a future trend as customers are pursuing consumer electronics and communication products towards lighter, thinner, shorter and smaller. This thesis aims to develop a miniaturized FPC antenna with features of small dimension, low-power consumption, much thinner, low cost, and it is particularly best for a sufficient transmission range and little space installation. As a result, we attempt to design a novel antenna by combining Hilbert fractal with Inverted-F structures to increase the efficiency of this specially designed miniaturized antenna. Inverted-F antenna, in essence, is characterized by miniaturization, and its other characteristics such as working bandwidth, size and gain could be further boosted as connected with the Hilbert fractal structures to make the main structure of the antenna. We investigate the FPC antenna by focusing on the 2.4-GHz ISM band. The measuring results are 2.46 GHz in center frequency and -22.3 dB in return loss, respectively. As the return loss less than -10 dB, the measuring results of the antenna are 180 MHz (2.37~2.55 GHz) in bandwidth, 7.3% in bandwidth percent, and 1.46 dBi in peak gain, respectively. The other design in this thesis is a miniaturized multi-band antenna. The antenna is proposed for applications in RFID band (922~928 MHz) that Taiwan open up to use and WLAN applications in IEEE 802.11 a/b/g (2.4~2.4835 GHz、5.15~5.35 GHz、5.470~5.725 GHz、5.725~5.825 GHz).