A Circularly Polarized GPS and Galileo Antenna Design and Novel Lens Antenna Design Using Metal Posts and Strips

• Main Authors: Yachi Shen, 沈雅綺
• Other Authors: Wanchu Hong
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/42777703434014505685

碩士 === 國立彰化師範大學 === 電信工程研究所 === 101 === In this thesis, we propose two different types of antennas design the first is circularly polarized PIFA-like antenna and the second is lens antenna using metal posts and strips. The circularly polarized antenna PIFA-like is used for GPS and Galileo applications. The coupling strips, which are integrated with partially shorting walls and open stubs are employed to produce a dual band operation, frequency 1036MHz to 1237MHz and 1543MHz to 1593MHz. The slots are also used in the metal patch and ground plane to improve the impedance bandwidth. In the lens antenna design, we propose the multi-level phase approximation to get a focus point. Then, we use metal posts and metal strips to realize this concept. First, we use the binary type to design the Fresnel zone and then metal posts are used to get the required phase difference. Furthermore, The equidistant phase quantization are also used to quantize the a phase difference value. This diffraction Lens antenna can also be realized by the metal strips. The simulation results demonstrate our design.