智慧型手機、筆記型電腦等行動裝置日漸普及，其搭載的無線通訊技術也成為發展重點。根據不同的裝置環境，其天線設計的條件也不一樣。以筆記型電腦為例，採用金屬機殼，或是螢幕窄邊框甚至無邊框的設計都是近期的發展趨勢，天線設計不僅在結構上面臨挑戰，也必須將天線擺放位置納入考量。
本論文第一部份提出一款應用在窄邊框筆電的WLAN雙頻天線設計，結合槽孔天線與倒F型天線的結構，高、低頻的模態可獨立調整頻率點與匹配，天線放置在筆電螢幕上緣。天線採用單一同軸纜線饋入，整體大小26.5 × 4 × 0.8 mm3，經過實作驗證，所提出之天線在WLAN頻段具有良好的增益與輻射效率。
第二款設計為放置於金屬機殼筆電轉軸的WLAN雙頻帶天線設計，天線本身為18 × 11.5 × 5.2 mm3的立方體，以適應轉軸區域的擺放空間。此設計應用的筆電機種其螢幕與鍵盤之間的轉軸具有接近360º的可轉動角度，能以常用的筆電姿態或類似平板電腦的姿態使用。經過實作驗證，天線在兩種筆電使用姿態底下都具有一定的輻射效率與接近全向性的場型，為一款可實際應用於筆電轉軸區域的WLAN雙頻天線。

Mobile devices such as smart phones and notebooks has become popular consumer products, and the wireless communication function is one of the essential part. Mobile terminal antenna designs are different depending on device environment. For example, the design needs for notebooks with narrow bezel and metal enclosure are different from conventional ones. The antenna design takes into account its position on the platform.
The first part of this thesis proposes a WLAN dual-band antenna design for narrow-bezel notebooks. The antenna is placed at the top edge of the display.. The resonant modes in high and low bands can be adjusted independently. The antenna is fed by a coaxial cable, and the overall antenna sizes are 26.5 × 4 × 0.8 mm3. Measurement results show that the proposed antenna has acceptable gain and high radiation efficiency in WLAN bands.
The second design is a WLAN dual-band antenna in the hinges of a laptop with metal enclosure. The design combines a loop antenna with a slot structure. The overall sizes are 18 × 11.5 × 5.2 mm3, which is small enough to accommodate hinge region. The design is to be used on a laptop with a flipping display, which can be configured into laptop and tablet modes. The antenna shall support WLAN operations in both modes. The design performance has been verified with measured results. The antenna has a good radiation efficiency and nearly-omnidirectional patterns under both postures.

[1] Yu-Tsung Huang, Chia-Tien Li, Wei-Shan Chang and Wen-Hsiu Hsu, “High isolation 2.4/5.2/5.8 GHz WLAN and 2.5 GHz WiMAX antennas for laptop computer application,” Asia-Pacific Microwave Conference 2014, pp. 977 – 979, 2014
[2] Shu-Chuan Chen, Yu-Chuan Tsou and Chih-Chia Huang, “LTE/WWAN monopole antenna integration with hinge slot region in the laptop computer” IEEE 5th Asia-Pacific Conference on Antennas and Propagation (APCAP), pp. 113-114, 2016.
[3] Zhao-Wei Hu, Chia-Hsien Wei, Da-Fei Mo and Yao-Yuan Chang, “Coupled-fed antenna design integrated with the hinge of notebook,” IEEE 5th Asia-Pacific Conference on Antennas and Propagation (APCAP), pp. 231-232, 2016.
[4] Hsin-Lung Su, Bo-Wei Huang, Hong-Rui Liang, Jing-Ying Tsai and Jian-Hua Lee, “Uniplanar multiband MIMO antennas for laptop computer applications,” 2017 IEEE International Conference on Antenna Innovations & Modern Technologies for Ground, Aircraft and Satellite Applications (iAIM), pp. 1 - 4 , Nov. 2017
[5] Ting-Wei Kang and Kin-Lu Wong, “Coupled-fed PIFA with a loop feed for 8-band internal LTE/WWAN laptop computer antenna,” IEEE Antennas and Propagation Society International Symposium, pp. 1 - 4, July 2010.
[6] Lev Pazin and Yehuda Leviatan, “Narrow-Size multiband inverted-F antenna,” IEEE Antennas and Wireless Propagation Letters, Vol. 10, pp.139-142, 2011.
[7] Shu-Chuan Chen, Po-Wei Wu, Chung-I G. Hsu and Jia-Yi Sze, “Integrated MIMO slot antenna on laptop computer for eight-band LTE/WWAN operation,” IEEE Transactions on Antennas and Propagation, Vol. 66, pp.105-114,2018

[8] Yong-Ling Ban, Yan-Li Yang, Ming-Yang Li, Li-Wan Zhang, “Printed monopole slot antenna for WWAN metal-rimmed smartphone applications,” IEEE International Symposium on Antennas and Propagation (ISAP), pp.1-4, 2015
[9] Shih-Hsun Chang and Wen-Jiao Liao, “Compact 3D antenna with comprehensive LTE band coverage for use on notebook hinge,” IEEE Asia-Pacific Conference on Antennas and Propagation, pp. 142 - 143, August 2012.
[10] Chow-Yen-Desmond Sim, Chih-Chiang Chen, Xiu Yin Zhang, Yuan-Lung Lee and Chih-Yang Chiang, “Very small-size uniplanar printed monopole antenna for dual-band WLAN laptop computer applications,” IEEE Transactions on Antennas and Propagation, Vol. 65, pp. 2916 - 2922, 2017.
[11] Jian-hao Li, Duolong Wu and Yanjie Wu, “A compact multi-band inverted-F antenna for laptop operations,” 5th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, pp. 432 - 437, 2013.
[12] Shu-Chuan Chen, Yun-Tsan Lee and Po-Wei Wu, “Small embedded LTE/WWAN antenna for a laptop computer” IEEE International Symposium on Antennas and Propagation (ISAP), pp. 352 - 353, 2016.
[13] A.L. Amadjikpè, D. Choudhury, G. E. Ponchak and J. Papapolymerou, “60 GHz antenna integration in a laptop computer base for WPAN applications,” IEEE Radio and Wireless Symposium, pp. 46 - 49, Jan. 2011.
[14] Shu-Chuan Chen, Jia-Yi Sze and Hung-Jiun Jian, “Loop antenna for the LTE/WWAN metal-casing,” IEEE International Conference on Computational Electromagnetics (ICCEM), pp. 150 - 152, 2017.
[15] Shu-Chuan Chen and Yu-Chuan Tsou, “LTE/WWAN monopole antenna for laptop computer applications,” IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES), pp.1-2, 2016.

[16] Qi Wu, Shiran Wang and Xiaoguang Sun, “Nonplanar dipole antennas for low-profile ultra-wideband applications: design, modeling, and implementation,” IEEE Antennas and Wireless Propagation Letters, Vol. 11, pp. 897 - 900, 02 Aug. 2012.
[17] Chih-Kai Chang, Wen-Jiao Liao and Chin-Che Tsai, “Metal body-integrated open-end slot-antenna designs for handset LTE uses,” IEEE Transactions on Antennas and Propagation , Vol. 64, pp. 5436 - 5440, Dec. 2016.
[18] Charinsak Saetiaw, Saksit Summart and Chanchai Thongsopa, “Curved double-layer strip folded dipole antenna for WBAN applications,” IEEE International Electrical Engineering Congress (iEECON), pp. 1 - 4, 2017.
[19] Wen-Jiao Liao, Te-Ming Liu and Shu-Yin Ho, “Miniaturized PIFA antenna for 2.4 GHz ISM band applications, ” 6th European Conference on Antennas and Propagation (EUCAP), pp. 3034 - 3037, 2012.
[20] Shih-Hsun Chang and Wen-Jiao Liao, “A broadband LTE/WWAN antenna design for tablet PC,” IEEE Transactions on Antennas and Propagation, Vol. 60, pp. 4354 - 4359, Sept. 2012 .