Multi Band and MIMO Antennas Designs For Laptop Computer Applications

• Main Authors: Chu,Yi-Chung, 朱繹中
• Other Authors: Sze, Jia-Yi
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/df4qh8

碩士 === 國防大學理工學院 === 電子工程碩士班 === 102 === This thesis presents two small-size antennas and one MIMO antenna for laptop-computer applications. The first antenna designed for operating at the LTE/WWAN bands has a small size of 50×10 mm2. The bandwidth-enhancement technique is mainly employing by a pair of printed parallel strips which is equivalent to a parallel-resonant circuit. The second antenna designed at the same operating bands has a smaller size of only 40 × 10 mm2 than the first one. The size-reduction design idea is implemented by using a reconfigurable circuit element embedded in a gap between metal strips. Finally, a design technique to improve the isolation for MIMO antenna system is also presented. With the isolation-enhancement technique of adding a pair of isolation elements on the supporting metal plate of the laptop computer, the isolation can effectively be improved at LTE 700 band for MIMO operation.