A Novel Surface Treatment Method for Improving the Antenna System Performance of Mobile Phones with Stainless Steel Frame

ZHONG Jiangwei; LIU Dingxin; LI Zhuo; SUN Xiaowei

Article Contents

Article Navigation > Chinese Journal of Electronics > 2014 > 23(2): 432-436

ZHONG Jiangwei, LIU Dingxin, LI Zhuo, et al., “A Novel Surface Treatment Method for Improving the Antenna System Performance of Mobile Phones with Stainless Steel Frame,” Chinese Journal of Electronics, vol. 23, no. 2, pp. 432-436, 2014,

Citation:

ZHONG Jiangwei, LIU Dingxin, LI Zhuo, et al., “A Novel Surface Treatment Method for Improving the Antenna System Performance of Mobile Phones with Stainless Steel Frame,” Chinese Journal of Electronics, vol. 23, no. 2, pp. 432-436, 2014,

Citation:

PDF( 254 KB)

A Novel Surface Treatment Method for Improving the Antenna System Performance of Mobile Phones with Stainless Steel Frame

1.
Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
2.
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;
3.
Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
4.
Lenovo Research Shanghai Branch, Shanghai 201203, China

Funds: This work is partially supported by the National Basic Research Program of China (973 Program) (No.2009CB320207).

More Information

Corresponding author: LIU Dingxin
Received Date: 2013-05-01
Rev Recd Date: 2013-07-01
Publish Date: 2014-04-05

Abstract

Abstract

A novel surface treatment method of plating Cu+PPS film/coating on a mobile phone's stainless steel frame for improving the antenna system efficiencies is proposed. The mobile phone was measured in free space, in a silicon cover, and in the hand and cover simultaneously. It's found that with this surface treatment, the total efficiency of the antenna system can be improved in all the four cases respectively by 14.22%, 1.38%, 15.19% and 1.72% at 940MHz (GSM900:880-960MHz), 2.59%, 3.21%, 4.81% and 1.43% at 1720MHz (DCS:1710-1880MHz) and 6.34%, 2.85%, 9.83% and 2.32% at 2100MHz (WCDMA:1920-2170MHz). This lowcost surface treatment method is an important breakthrough to improve antenna system performance of mobile phones especially for those with a stainless steel frame, and suitable for mass production.
- Antenna efficiency,
- Surface treatment,
- Stainless steel,
- Hand impacts,
- Frequency offset,
- Insulation layer,
- Wave-transparent material

FullText(HTML)

References(28)

References

Jae Hun Seol, "Two-dimensional phonon transport in supported graphene", Science, Vol.328, No.5975, pp.213-216, 2010.

S. Ghosh, I. Calizo, "Extremely high thermal conductivity of graphene: Prospects for thermal management applications in nanoelectronic circuits", Applied Physics Letters, Vol.92, No.15, pp.151911-1-151911-3, 2008.

Alexander A. Balandin, "Superior thermal conductivity of single-layer graphene", Nano Letters, Vol.8, No.3, pp.902-907, 2008.

P. Kim, L. Shi, "Thermal transport measurements of individual multiwalled nanotubes", Physics Review Letters, Vol.87, No.21, pp.215502-1-215502-4, 2001.

George W. Hanson, "Current on an infinitely-long carbon nanotube antenna excited by a gap generator", IEEE Transactions on Antennas and Propagation, Vol.54, No.1. pp.76-81, 2006.

G.W. Hanson, "Fundamental transmitting properties of carbon nanotube antennas", IEEE Transactions on Antennas and Propagation, Vol.53, No.11, pp.3426-3435, 2005.

S.A. Maksimenko, "Carbon nanotube antenna: Far-field, near-field and thermal-noise properties", Physica E: Lowdimensional Systems and Nanostructures, Vol.40, No.7, pp.2360-2364, 2008.

Y. Huang, "Thickness of graphene and single-wall carbon nanotubes", Physics Review B, Vol.74, No.24, pp.245413, 2006.

Karthik Shankar, Jayasundera Bandara, "Highly efficient solar cells using TiO2 nanotube arrays sensitized with a donorantenna dye", Nano Letters, Vol.8, No.6, pp.1654-1659, 2008.

Fazel Yavari, "Enhanced thermal conductivity in a nanostructured phase change composite due to low concentration graphene additives", Physical Chemistry C, Vol.115, pp.8753-8758, 2011.

J. Macutkevic, "Multi-walled carbon nanotubes/PMMA composites for THz applications", Diamond & Related Materials, Vol.25, pp.13-18, 2012.

David G. Cahill, "Thermal conductivity measurement from 30 to 750K: The 3ω method", Review of Scientific Instruments, Vol.61, No.2, pp.802-808, 1990.

Jung Hun Kim, "Application of the three omega thermal conductivity measurement method to a film on a substrate of finite thickness", Applied Physics, Vol.86, No.7, pp.3959-3963, 1999.

K. Jagannadham, "Thermal conductivity of copper-graphene composite films synthesized by electrochemical deposition with exfoliated graphene platelets", Metallurgical and Materials, Vol.43B, pp.316-324, 2012.

K. Jagannadham, "Thermal conductivity of indium-graphene and indium-gallium-graphene composites", Electronic Materials, Vol.40, No.1, pp.25-34, 2010.

Tatyana S. Koltsova, "New hybrid copper composite materials based on carbon nanostructures", Materials Science and Engineering, Vol.2, No.4, pp.240-246, 2012.

Cheng Yang, Yutao Xie, "Silver surface iodination for enhancing the conductivity of conductive composites", Advanced Functional Materials, Vol.20, pp.2580-2587, 2010.

Neda Neykova, "Novel plasma treatment in linear antenna microwave PECVD system", 13TH Joint Vacuum Conference, Vol.86, No.6, pp.603-607, 2012.

Yuichi Setsuhara, "Plasma surface treatment of polymers with inductivity-coupled RF plasmas driven by low-inductance antenna units", Thin Solid Films, Vol.518, No.3, pp.1006-1011, 2009.

Yuichi Setsuhara, "Properties of argon/oxygen mixture plasmas driven by multiple internal-antenna units", Surface and Coating Technology, Vol.202, pp.5230-5233, 2008.

Yuichi Setsuhara, "Discharge profiles of internal-antenna-driven inductively-coupled plasmas", Surface and Coating Technology, Vol.202, pp.5234-5237, 2008.

T. Aumann, "Rapid surface modification of polyethylene in microwave and r.f.-plasmas: Comparative study", Surface and Coatings Technology, Vol.142, No.144, pp.169-174, 2001.

Yuichi Setsuhara, "Large-area low-damage plasma sources driven by multiple low-inductance-antenna modules for nextgeneration flat-panel display processes", Surface and Coatings Technology, Vol.202, pp.5225-5229, 2008.

Yuchang Tyan, "Surface properties and in vitro analyses of immobilized chitosan onto polypropylene non-woven fabric surface using antenna-coupling microwave plasma", Materials Science: Materials in Medicine, Vol.14, pp.775-781, 2003.

Y.W. Chenyang, "Surface modifications of expanded poly (tetrafluoroethylene) sheets assisted by CO2 antenna coupling microwave plasma", Macromolecules, Vol.33, No.15, pp.5638-5643, 2000.

V.M. Shibkov, "Microwave discharge on the surface of a dielectric antenna", Technical Physics, Vol.50, No.4, pp.455-461, 2005.

Q.X. CHU, J.F. Li and L.H. YE, "Design of compact broad band planar phone antenna with low ground plane effect", Acta Electronica Sinica, Vol.39, No.8, pp.1919-1922, 2011.

H.H. Li, X.Q. Mou, Zh. Ji, H. Yu and Y. Li, "A Novel wideband CPW-Fed 5.8GHz RFID tag antenna", Chinese Journal of Electronics, Vol.21, No.2, pp.202-208, 2012.

Relative Articles

Supplements(0)

Cited By

Proportional views