Design of Half-Ring MIMO Antenna to Reduce the Mutual Coupling

  • K. Vasu Babu
  • B. Anuradha
Conference paper


We propose a novel, dual-polarized MIMO radiator, which consists of half rings, and included in the ring a square shape at the top side and half circular shape at bottom side operating from 2 to 10 GHz with a microstrip feeding. The suppression of mutual coupling is obtained by maintaining the separation between the patches around 0.25 λ0. The half-ring MIMO antenna is resonating at dual band of frequencies at 7.24 and 8.16 GHz with impedance bandwidths of 430 and 230 MHz, has |S11| < −10 dB in the MIMO range from 2.0 to 10.0 GHz and has a mutual coupling with |S21| < −20 dB. The radiator has a low ECC (envelope correlation coefficient) with values equal to approximately less than 0.025, which will prove that the half-ring MIMO radiator shows better diversity performance. The half-ring MIMO radiator has improved the parameters of reflection coefficient, mutual coupling, realized gain, group delay and real/imaginary impedances.


Multiple input-multiple output Realized gain ECC Group delay Real/imaginary impedances 



envelope correlation coefficient


group delay


multiple input-multiple output


negative group delay


ultra-wide band antenna


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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • K. Vasu Babu
    • 1
  • B. Anuradha
    • 2
  1. 1.Department of ECEVVITGunturIndia
  2. 2.Department of ECESri Venkateswara UniversityTirupatiIndia

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