Design of Multi-Antenna System for UMTS Clamshell Mobile Phones with Ground Plane Effects Considerations

In this paper, the influence of the ground plane dimensions on the port-to-port isolation of two closelyspaced Universal Mobile Telecommunications System (UMTS) Planar Inverted-F Antennas (PIFAs) with and without neutralization line is first presented. Parametric studies show the existence of an optimal size of the ground plane allowing optimizing the isolation and the efficiency of the considered antenna system. The results obtained with this study are used in the second part to develop an efficient neutralized multi-antenna system for clamshelltype mobile phones. The obtained results, in terms of isolation, matching and diversity for the two possible configurations of the clamshell system in use namely the open and the closed states, show that good performance are obtained in the open state and preserved in the closed state. Prototypes of these two configurations are realized and measurement results are in good agreement with the simulations.

[1]  C. Luxey,et al.  Multiband multi-antenna system for MIMO wlan box , 2010, 2010 14th International Symposium on Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference.

[2]  Aliou Diallo,et al.  Enhanced two-antenna structures for universal mobile telecommunications system diversity terminals , 2008 .

[3]  Yuehe Ge,et al.  Compact diversity antenna for wireless devices , 2005 .

[4]  Per-Simon Kildal,et al.  Diversity Characterization of Optimized Two-Antenna Systems for UMTS Handsets , 2007, EURASIP J. Wirel. Commun. Netw..

[5]  Aliou Diallo,et al.  Pentaband internal antenna for handset communication devices , 2006 .

[6]  Ken-Huang Lin,et al.  Design of MIMO antennas with strong isolation for portable applications , 2009, 2009 IEEE Antennas and Propagation Society International Symposium.

[7]  Robert Staraj,et al.  Artificial neural networks modeling technique for fast analysis and design of multi-antenna systems , 2013, 2013 7th European Conference on Antennas and Propagation (EuCAP).

[8]  Saeed Gazor,et al.  The Impact of Non-Isotropic Scattering and Directional Antennas on MIMO Multicarrier Mobile Communication Channels , 2008, IEEE Transactions on Communications.

[9]  Zhi Ning Chen,et al.  Small Printed Ultrawideband Antenna With Reduced Ground Plane Effect , 2007, IEEE Transactions on Antennas and Propagation.

[10]  P. Vainikainen,et al.  Capacity enhancement by increasing both mutual coupling and efficiency: a novel approach , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[11]  Chun-Yi Chang,et al.  Shorted monopole antenna for curved shape phone housing in clamshell phone , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[12]  Ki-Jin Kim,et al.  The high isolation dual‐band inverted F antenna diversity system with the small N‐section resonators on the ground plane , 2007 .

[13]  A.S. Mohan,et al.  Characterize the indoor multipath propagation for MIMO communications , 2005, 2005 Asia-Pacific Microwave Conference Proceedings.

[14]  Riku Makinen,et al.  Improvement of antenna isolation in hand-held devices using miniaturized electromagnetic band-gap structures , 2007 .

[15]  Kin-Lu Wong,et al.  Simple Folded Monopole Slot Antenna for Penta-Band Clamshell Mobile Phone Application , 2009, IEEE Transactions on Antennas and Propagation.

[16]  Chi Ho Cheng,et al.  Reduction of Mutual Coupling Between Closely-Packed Antenna Elements , 2007, IEEE Transactions on Antennas and Propagation.

[17]  Yingzeng Yin,et al.  Internal dual‐antenna in the folder‐type mobile phone for DVB‐H and 3G applications , 2011 .

[18]  Kin-Lu Wong,et al.  Finite ground plane effects on broad-band dual polarized patch antenna properties , 2003 .

[19]  Zhongfu Ye,et al.  Estimation of Fading Coefficients in the Presence of Multipath Propagation , 2009, IEEE Transactions on Antennas and Propagation.

[20]  Xing Zhang,et al.  Performance Analysis of Multiuser Diversity in MIMO Systems with Antenna Selection , 2008, IEEE Transactions on Wireless Communications.

[21]  Jong-Won Yu,et al.  High Isolation Internal Dual-Band Planar Inverted-F Antenna Diversity System with Band-Notched Slots for MIMO Terminals , 2006, 2006 European Microwave Conference.

[22]  A. Diallo,et al.  Efficient two-port antenna system for GSM=DCS=UMTS multimode mobile phones , 2007 .

[23]  T. Itoh,et al.  High isolation dual-polarized patch antenna using integrated defected ground structure , 2004, IEEE Microwave and Wireless Components Letters.

[24]  Cyril Luxey,et al.  Highly-efficient multiple antenna-systems for small MIMO devices , 2010, 2010 International Workshop on Antenna Technology (iWAT).

[25]  Shyh-Jong Chung,et al.  A Decoupling Technique for Increasing the Port Isolation Between Two Strongly Coupled Antennas , 2008, IEEE Transactions on Antennas and Propagation.

[26]  Jeongpyo Kim,et al.  Design of a multiantenna structure for WCDMA and Wibro MIMO systems using ENG‐ZOR unit cells , 2010 .

[27]  A. T. Arkko.  Effect of ground plane size on the free-space performance of a mobile handset PIFA antenna , 2003 .

[28]  C. Luxey,et al.  Estimation of the diversity performance of several two-antenna systems in different propagation environments , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[29]  H. D. Hristov,et al.  PIFA input bandwidth enhancement by changing feed plate silhouette , 2004 .

[30]  A. Diallo,et al.  Study and Reduction of the Mutual Coupling Between Two Mobile Phone PIFAs Operating in the DCS1800 and UMTS Bands , 2006, IEEE Transactions on Antennas and Propagation.