0. MIMO天線設計期中報告 “Multiband LTE/WWAN Phone Antennas,” 論文研討: 報告人:
Yong-Ling Ban,Joshua LeWei Li,
“Multiband LTE/WWAN Phone Antennas,”
International Workshop on Antenna Technology, 2015.
報告人:
碩研通訊一甲 MA 賴勇全
Southern Taiwan University of Science and Technology

1. 摘要 我們回顧了近幾年的手機天線並做了一些研究。 最近幾年裡出現了一些多頻帶單極天線的手機，尤其是大屏觸控手機的窄邊框天線。
應用於LTE頻段的耦合式MIMO天線。
兩種不同的耦合共振技術，包括精心設計的突出地面和中性線。
最後是兩個多頻段天線金屬環手機。

2. 天線設計
圖中為所提出的天線架構，採用耦合式饋入然後在地開槽孔，然後從地延伸到邊框上緣，天線主體尺寸為 60×105 mm，輻射面積為 15×40 mm，邊框採用厚度為 1 mm 塑料，板材則採用 0.8 mm FR4，饋入線為50歐姆 微帶線線饋入。

3. 天線設計
接著同樣適應用於LTE/WWAN的天線，使用手機的邊框來做，寬度為 5 mm。

4. 天線設計
圖為可調頻的手機，使用一個PIN二極管插在strip 2 的兩個路徑之間，透過控制PIN二極管的on/off開關，就可切換所需要的頻帶。

5. 天線設計
圖中為耦合式天線，首先會有兩個相同面積的天線去跟地面做耦合共振，接著利用T-bar來做出高隔離的效果，同時也有良好的阻抗匹配。

6. 天線設計
圖中的天線主要是在說明，即使使用了挖槽孔做隔離或者是畫T-bar都沒有達到想要的隔離效果，可以再加上一條中性線，只是中性線的位置、長短、粗細都要經過一定的設計。

7. 天線設計
圖中為多頻金屬環手機天線，因為現在手機為了美觀、機械強度都會使用金屬來做邊框，但只要金屬的材料都會影響到天線本身的性能，所以就提出了如何利用金屬環來跟天線做結合，首先在途中可以看到兩個slot，這兩個slot所帶來的效果就是低頻時的良好共振。

8. 天線設計
圖中為全金屬背殼的手機天線，可以改善阻抗匹配和頻寬。

9. 心得
這一篇的paper跟以往讀過的不太相同，主要是他都是在討論別人所做好的天線，讀完這篇paper後，才發現原來近年來的手機天線有很多創新的設計，例如：金屬邊框、金屬外殼，耦合式MIMO、以及PIN二極管控制。這對剛開始畫手機天線的新手有很大的幫助。

10. 參考文獻
[1] P. Vainikainen, J. Ollikainen, et.al., Resonator-Based Analysis of the
Combination of Mobile Handset Antenna and Chassis, IEEE Trans.
Antennas Propag, vol.50, no.10, pp , 2002.
[2] F. H. Chu and K. L. Wong, “Internal coupled-fed dual-loop antenna
integrated with a USB connector for WWAN/LTE mobile handset,”
IEEE Trans. Antennas Propag., vol. 59, no. 11, pp , 2011.
[3] Y. L. Ban, J. H. Chen, et. al., Printed multi-resonance antenna
embedding two inductors in radiating strips for internal mobile phone
LTE/WWAN operation , J. of Electromagn. Waves and Appl. vol. 26, pp.
, 2012.
[4] Y. L. Ban, C. L. Liu, et. al., Small-size multi-resonant octa-band antenna
for LTE/WWAN smart phone applications, IEEE Antennas Wireless
Propag. Lett., vol.13, pp , 2014.
[5] Y. L. Ban, J. H. Chen, et. al., Small-size printed coupled-fed antenna for
eight-band LTE/GSM/UMTS wireless wide area network operation in
an internal mobile handset, IET Microw. Antennas & Propag., vol.7,
no.6, pp , 2013.

11. 參考文獻
[6] Y. L. Ban, C. L. Liu, et. al., Small-size coupled-fed antenna with two
printed distributed inductors in radiating strips for seven-band
WWAN/LTE mobile handset, IEEE Trans. Antennas Propag, vol.61,
no.11, pp , 2013.
[7] Y. L. Ban, J. H. Chen, et. al., Low-profile printed octa-band
LTE/WWAN mobile phone antenna using embedded parallel resonant
structure, IEEE Trans. Antennas Propag. vol.61, no.7, pp ,
2013.
[8] Y. L. Ban, C. L. Liu, et. al., Small-size wideband monopole with
distributed inductive strip for seven-band WWAN/LTE mobile phone,
IEEE Antennas Wireless Propag. Lett., vol.12, pp.7-10, 2013.
[9] Z. Chen, Y. L. Ban, et. al., Bandwidth enhancement of LTE/WWAN
printed mobile phone antenna using slotted ground structure, Progress
In Electromagnetics Research, vol.129, pp , 2012.
[10] Y. L. Ban, J. H. Chen, et. al., Printed slot antenna for seven-band
GSM/UMTS/LTE operation in the internal mobile phone, J. of
Electromagn. Waves and Appl., vol. 26, pp , 2012.

12. 參考文獻
[11] Y. L. Ban, Y. F. Qiang, et. al., Low-profile narrow-frame antenna for
seven-band WWAN/LTE smartphone applications, IEEE Antennas
Wireless Propag. Lett., vol.13, pp , 2014
[12] Y. L. Ban, Z. X. Chen, et. al., Two-strip narrow-frame monopole
antenna with a capacitor loaded for hepta-band smartphone applications,
Progress In Electromagnetics Research. Vol.145, pp.31-38, 2014.
[13] Y. L. Ban, Z. X. Chen, et. al., Reconfigurable Narrow-Frame Antenna
for Hepta-Band WWAN/LTE Smartphone Applications, IEEE Antennas
Wireless Propag. Lett., vol.13, pp , 2014.
[14] Y. L. Ban, S. C. Sun, et. al., Compact eight-band frequency
reconfigurable antenna for LTE/WWAN tablet computer applications,
IEEE Trans. Antennas Propag.,. vol.62, no.1, pp , 2014
[15] Y. L. Ban, S. Yang, et. al., Decoupled planar WWAN antennas with Tshaped
protruded ground for smartphone applications, IEEE Antennas
Wireless Propag. Lett., vol.13, pp , 2014.

13. 參考文獻
[16] Y. L. Ban, Z. X. Chen, et. al., Decoupled closely-spaced hepta-band
antenna array for WWAN/LTE smartphone applications, IEEE Antennas
Wireless Propag. Lett., vol.13, pp.31-34, 2014.
[17] Y. L. Ban, Z. X. Chen, et. al., Decoupled hepta-band antenna array for
WWAN/LTE smartphone applications, IEEE Antennas Wireless Propag.
Lett., vol.13, pp , 2014.
[18] L. W. Zhang, Y. L. Ban, Novel hepta-band coupled-fed antenna for
WWAN/LTE metal-ring smartphone applications, PIERS Proceedings,
Guangzhou, China, Aug , pp , 2014.
[19] P. P. Li, Y. L. Ban, Printed Multi-band Slot Antenna Surrounded by a
Metal Ring for WWAN Smartphone Application, PIERS Proceedings,
Guangzhou, China, Aug , pp , 2014.
[20] Y. F. Qiang, Y. L. Ban, A Hepta-band WWAN/LTE Antenna Design for
Metal-rimmed Smartphone Applications, PIERS Proceedings,
Guangzhou, China, Aug , pp , 2014.
[21] Y. L. Ban, Y. F. Qiang, et. al., A dual-loop antenna design for heptaband
WWAN/LTE metal-rimmed smartphone applications, IEEE Trans.
Antennas Propag., vol.63, no.1, pp.48-58, 2015.