Compact Dual-Band MIMO Antenna with High Port Isolation for WLAN Applications

A compact dual-band MIMO antenna with high port isolation for WLAN applications is proposed. The proposed antenna is basically composed of two monopoles and designed at 2.4/5.2 GHz. High port isolation is achieved by introducing a T-shaped junction on the top surface of the substrate and etching two slots on the ground. The measured bandwidth of the proposed antenna are 2.34– 2.55GHz and 5.13–5.85 GHz, which are suitable for WLAN applications, and the measured isolation between the two monopoles is higher than 20 dB in both bands. Meanwhile, the envelope correlation coefficient of the antenna at both operating bands is lower than 0.001, which means that the antenna has high diversity gain. Good agreement is achieved between the predicted result and the measured data. The overall size of the proposed antenna is 38mm× 43mm× 1.6 mm.

[1]  J. C. Coetzee,et al.  Dual-Frequency Decoupling for Two Distinct Antennas , 2012, IEEE Antennas and Wireless Propagation Letters.

[2]  Kin‐Lu Wong,et al.  Printed Loop Antenna With a Perpendicular Feed for Penta-Band Mobile Phone Application , 2008, IEEE Transactions on Antennas and Propagation.

[3]  R.G. Vaughan,et al.  Antenna diversity in mobile communications , 1987, IEEE Transactions on Vehicular Technology.

[4]  R. Stephan,et al.  Miniaturized antenna arrays using decoupling networks with realistic elements , 2006, IEEE Transactions on Microwave Theory and Techniques.

[5]  Hüseyin Arslan,et al.  Dynamics of spatial correlation and implications on MIMO systems , 2004, IEEE Communications Magazine.

[6]  Won-Yong Shin,et al.  Frame Design and Throughput Evaluation for Practical Multiuser MIMO OFDMA Systems , 2011, IEEE Transactions on Vehicular Technology.

[7]  Yingzeng Yin,et al.  EIGENMODE DECOUPLING FOR MIMO LOOP-ANTENNA BASED ON 180 - COUPLER , 2011 .

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

[9]  Yan Wang,et al.  A Wideband Printed Dual-Antenna System With a Novel Neutralization Line for Mobile Terminals , 2013, IEEE Antennas and Wireless Propagation Letters.

[10]  R. Shavit,et al.  Microstrip antenna phased array with electromagnetic bandgap substrate , 2004, IEEE Transactions on Antennas and Propagation.

[11]  Xiaowei Shi,et al.  An Overview on Defected Ground Structure , 2008 .

[12]  Mohammad S. Sharawi,et al.  Isolation Improvement in a Dual-Band Dual-Element MIMO Antenna System Using Capacitively Loaded Loops , 2013 .

[13]  Su-Jin Park,et al.  Compact MIMO antenna with high isolation performance , 2010 .

[14]  Jordi Romeu Robert,et al.  Exact representation of antenna system diversity performance from input parameter description , 2003 .

[15]  S. Gong,et al.  Compact dual-band monopole antennas with high port isolation , 2011 .

[16]  Wen-Chao Zheng,et al.  Dual-Band Dual-Polarized Compact Bowtie Antenna Array for Anti-Interference MIMO WLAN , 2014, IEEE Transactions on Antennas and Propagation.

[17]  Xianqi Lin,et al.  Dual-band bandpass filter using stub loaded resonators with multiple transmission zeros , 2010, Proceedings of the 9th International Symposium on Antennas, Propagation and EM Theory.