Miniaturized CPW-Fed Slot Antenna

• Main Authors: Ming-Ta Tsai, 蔡銘達
• Other Authors: 許博文
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/82991202777469823673

碩士 === 臺灣大學 === 電信工程學研究所 === 98 === In this thesis, a method for size reduction of the slot antenna is presented. The method first treats the resonant part of the antenna as a transmission line section. Then, the transmission line section is set equivalent to the circuit model with components that have small dimensions. Finally, resonant part of the antenna is replaced by the equivalent components and the size reduction is achieved. Base on the above method, several miniaturized CPW-fed slot antennas are pro-posed. Compared with the traditional CPW-fed slot antennas, the proposed designs not only have much smaller areas, but still retain the radiation patterns. As expected, nar-rower bandwidth and lower antenna gain level are the cost of miniaturization. However, with some modifications on the antenna structure, bandwidth can be enlarged back to the original level. Of course, degradation on miniaturization level is the cost of this bandwidth enhancement. All the methods and designs mentioned above are discussed and verified experi-mentally.