LTE and WLAN Antenna Designs for Notebooks

• Main Authors: Zhi-Chao Zhang, 張智超
• Other Authors: Wen-Jiao Liao
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/9689n6

碩士 === 國立臺灣科技大學 === 電機工程系 === 107 === Owing to the prosperity of the wireless communication industry, various mobile devices have been developed. Pervasive connection to the Internet at all-time has become a norm-throughput. In addition to the higher in wireless transmission, consumers also prefer sleek and light weight product. Increased connection requirements and configuration narrow border for high-end laptop models also make the design task more challenging. The first part proposes a dual-band WLAN antenna design that is placed inside the hinge area of a 2-in-1 convertible-type notebook. In order to create two resonant modes in a limited antenna space, the antenna uses two open-ended slots to cover WLAN 2.45/5 GHz bands. Two techniques including the use of a thin wire and a broadened slot opening are adopted. This design performs well in both notebook and tablet modes. It’s implemented on a single-sided printed circuit board, which can reduce the manufacturing cost. The second design is a frequency-reconfigurable antenna placed on the top edge of laptop screen. The operating bands comply with the long term evolution (LTE) needs for mobile communication. The principle feature of the reconfigurable antenna is adding metal patchs at the end of the IFA antenna. The diodes are connected to the patches and can be used to change the capacitive loading values. Three different antenna design of different sizes are proposed. The first one is a 66.5 mm × 15 mm × 0.8 mm planar thickness; the second design sizes are 65 mm × 7 mm × 6 mm, which has the advantages of a smaller length and a smaller width. It provides comprehensive LTE band coverage; the third one dimensions are 70 mm × 7 mm × 3 mm. The antenna height is reduced to merely 3 mm.