http://www.iaeme.com/IJMET/index.asp 53 editor@iaeme.com International Journal of Mechanical Engineering and Technology (IJMET) Volume 8, Issue 10, October 2017, pp. 53–59, Article ID: IJMET_08_10_007 Available online at http://www.iaeme.com/IJMET/issues.asp?JType=IJMET&VType=8&IType=10 ISSN Print: 0976-6340 and ISSN Online: 0976-6359 © IAEME Publication Scopus Indexed A HIGH EFFICIENT COMPACT CPW FED MIMO ANTENNA FOR WIRELESS APPLICATIONS D. Dileepan and R. Sanmugasundaram Veltech Dr.RR & Dr.SR University, Chennai, India ABSTRACT In this paper, a compact, high efficient CPW (co-planar waveguide) fed MIMO antenna which is used for various wireless applications is proposed. In this work, the proposed antenna is evaluated using IE3D simulation software. The proposed antenna has the compact size of 16.55mm x 20.05mm x 1.6 mm and the substrate is RT_Duroid 5880 used (İ r is 2.2 and tanį is 0.0009). The antenna resonates at 8.5 to 8.7 GHz frequency, with a return loss value of proposed antenna shows -48dB at 8.64 GHz. The gain obtained is 5.5 dBi, VSWR of around 1.1 at 8.64 GHz. The antenna is found to have 80% efficiency. Key words: Coplanar wave guide, MIMO antenna, hexagonal slot structure & wireless applications. Cite this Article: D. Dileepan and R. Sanmugasundaram, A High Efficient Compact CPW Fed MIMO Antenna for Wireless Applications, International Journal of Mechanical Engineering and Technology 8(10), 2017, pp. 53–59. http://www.iaeme.com/IJMET/issues.asp?JType=IJMET&VType=8&IType=10 1. INTRODUCTION In recent years, most of the wireless mobile and communication systems, the Multiple-Input- Multiple-Output (MIMO) antenna has been used. To increase the quality factor, use higher data rate, and increase the quality of signal [1]. This technology particularly used in 3G and 4G devices. In this method, several antennas are connected in single board at both receiver and transmitter and operating in same resonant frequency. However, such a technique adds additional challenges to the antenna design where; the required MIMO specifications should be achieved, including overall MIMO antenna size (practical constrain) and the mutual couplings between individual antennas on one PCB (signal quality design constrain). These constrains should be achieved simultaneously to design a good MIMO antenna. Lots of researches have been done to design a MIMO antenna having the required size and minimum coupling for a specific application, including many approaches to minimize the coupling under size constrain. In 2010, Zhou et al. proposed MIMO antenna array for mobile handset operating in the band (1.6–2.6) GHz with −11 dB coupling [2].