Design of 5G Antenna System for Mobile Devices

• Main Authors: Chang-Yu Chen, 陳長佑
• Other Authors: 潘善政
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/9n6248

碩士 === 樹德科技大學 === 電腦與通訊系碩士班 === 107 === This thesis mainly focuses on the 5G system antenna design of small mobile devices. There are three antenna system designs in the thesis and each of which is an enhancement design of the previous one. In the first antenna system design, we uses a simple monopole antenna structure, a parasitic short-circuit coupling strip, and a shunt capacitor to excite the 5G-band operating frequency, and by adjusting the length of the short-circuit strip, the capacitance and position of the shunt capacitor, the high-frequency and low-frequency modes can be controlled, respectively. The second antenna system design is a multi-input multi-output (MIMO) antenna design with 4-set antenna elements that are based on the first one, where the influence and the degree of antenna isolation for different spacing and position between antennas will be explored. The third antenna system design is still a MIMO antenna design with 8-set antenna elements for 5G band and 2-set antenna elements for WLAN band for the mobile device. In this one, mirroring technique will be involved, the physical structure of the antenna elements are the same, the length of the short-circuit strip and the position of the shunt capacitor will be tuned for WLAN band, and the interference between antennas will be discussed also.