Circularly Polarized Planar Periodic Leaky Wave Antenna and Rotman Lens Array Antenna

• Main Authors: Hung-I Lin, 林紘毅
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/72452348406405799420

碩士 === 國立臺灣科技大學 === 電機工程系 === 100 === In this thesis, the proposed periodic leaky wave antenna, which has a simple planar geometry, provides a circularly polarized beam steerable via frequency scanning. The antenna comprises serially connected phase inverters made of parallel strip line. Radiations emit from geometric discontinuities in phase inverter structures and hence form a leaky wave antenna. From simulation and verification results, broad scanning beam coverage is observed with good circular polarization performance. In the second part, an electronically reconfigurable beam switching array antenna applicable to MIMO technology in the 2.4 GHz band is proposed in this work. The array antenna contains a Rotman lens and four element antennas. The Rotman lens, which is a true time delay device, allows simultaneous operation of multiple beams. From the results, the simple beam switching mechanism implemented with the Rotman lens suits well to the MIMO transceiver need.