Design of Dual-Band MIMO Antenna for LTE 2500, Wimax, and C-Band Applications to Reduce the Mutual Coupling K. Vasu Babu and B. Anuradha Abstract This article demonstrates the dual-band MIMO antenna using neutral- ization line, defected ground structure, and parasitic elements for enhancing the mutual coupling. These structures are formed by inserting different techniques in between the two microstrip patch antennas. When arranging these types of struc- tures are inserted in the middle of two antennas and a fringe-to-fringe spacing is 7 mm (0.06λ 0 ), exceeding beyond −20 dB mutual coupling is obtained over the entire bandwidth range from 2.4 to 2.8 GHz and 5.8 to 6.6 GHz with S 11 and S 12 less than −10 dB. Moreover, the mutual coupling reaches beyond −35 dB over the entire band of 2.4–2.8 GHz and 5.8–6.6 GHz frequencies. By using this type of tech- niques, it provide better results compared to previous works which produces greater than −30 dB in the entire wider bandwidth. Due to this technique improving the impedance bandwidth as well as radiation characteristics of dual-band antenna. Keywords Neutralization technique · Defected ground structures Parasitic elements · Greater mutual coupling · Wideband Envelope correlation coefficient (ECC) 1 Introduction MIMO antennas is a simple technique to improve the performance characteristics of antenna enhancing the parameters like S-parameters, radiation patterns, radiation efficiency, and envelope correlation coefficient (ECC) [1]. A simple decoupling tech- nique is used for reducing the isolation in planar MMO using split-ring resonators and 1D EBG with −30 dB in [2]. To get the better isolation maintained between the K. Vasu Babu (B ) · B. Anuradha Department of ECE, Sri Venkateswara University, Tirupati, Andhra Pradesh, India e-mail: vasubabuece@gmail.com B. Anuradha e-mail: anubhuma@yahoo.com © Springer Nature Singapore Pte Ltd. 2019 G. Panda et al. (eds.), Microelectronics, Electromagnetics and Telecommunications, Lecture Notes in Electrical Engineering 521, https://doi.org/10.1007/978-981-13-1906-8_12 107