WLAN / WiMAX Antennas for Laptop Applications

• Main Authors: LIN,CHIEN-HUNG, 林建宏
• Other Authors: CHEN,WEN-SHAN
• Format: Others
• Language: zh-TW
• Published: 100
• Online Access: http://ndltd.ncl.edu.tw/handle/67532447522092244034

碩士 === 南台科技大學 === 通訊工程研究所 === 99 === This thesis proposed two internal antennas for laptop applications. A 10-inch metal plate commonly used back board for liquid crystal screen, is used as the two antennas’ ground plane. By the effective ground plane, the two antennas operate resonant frequency bands for WLAN and WiMAX applications. In the first design, the proposed antenna consists of a monopole antenna structure and a quasi coupling PIFA antenna structure. The monopole antenna operates a high resonant band that is from 4.99 GHz to 6.34 GHz. By adjusting the impedance matching of PIFA antenna, a middle and a low resonant band gets together to provide an impedance bandwidth from 2.35 GHz to 4.06 GHz. In the second design, a small-size loop antenna with coupled-fed mechanism is proposed. The impedance bandwidth of the loop antenna is obtained through its first resonant mode and higher resonant mode. The obtained operation bandwidths can be applied in WLAN/WiMAX applications. The proposed antennas also have advantages of low profile, small size, low cost and easy fabrication.