Design of Printed Broadband Monopole Antenna for Wireless Communications

• Main Authors: Yi-Tien Chen, 陳義天
• Other Authors: Wen-Shan Chen
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/72513748125284427802

碩士 === 南台科技大學 === 通訊工程研究所 === 97 === The design and investigation of multi-band printed monopole antenna for wireless applications have been presented in this thesis. All the antennas are fabricated on FR4 substrate and fed by a 50-ohm microstrip line. First we designed a rectangular patch monopole antenna with a size of 135×40mm2. The antenna can operate at frequency ranges from 1000MHz to 2500MHz. By truncating two right triangles on both top and bottom of the rectangular patch, the high and low frequency bandwidth can extend from 530MHz to 3000 MHz. The bandwidth can cover the operation bands of Digital Television (DTV), Global System for Mobile communications (GSM), Digital Communication System (DCS), Personal Communication System (PCS), Universal Mobile Telephone System (UMTS) and Wireless Local Area Network (WLAN) applications (IEEE 802.11 b/g). Meanwhile, the antenna gain and radiation pattern of the proposed antenna are better than that of the original one. The further study is focus on reducing the antenna size. Therefore, the antenna size is reduced proportionally. In order to adjust the impedance matching of the antenna, we put an inductor between microstrip and radiation patch to meet the application band of DTV in Taiwan (530~600MHz).