Electromagnetic coupling suppression of circularly polarized mimo antenna with novel loop parasitic for UWB communication

In this article, four elements circularly polarized trapezoid multiple inputs and multiple outputs (MIMO) antenna for UWB application is presented. The electrical dimension of presented four elements MIMO antenna in term of lambda (λ) is 0.44λ × 0.44λ × 0.012λ. The novel loop parasitic is used for the enhancement of isolation and impedance bandwidth. The reflection coefficient (Sij ∈ i = j) is less than − 10dB in range of 2.4 GHz and 13.5 GHz and isolation (Sij ∈ i ≠ j) is greater than 22dB in given range. The axial ratio bandwidth (ARBW) of presented trapezoid antenna is 3.6 GHz; less than − 3dB in the range of 6.7 and 10.3 GHz. The peak gain is 5.9dBi, diversity gain (DG) > 9.89dB and envelope correlation coefficient (ECC) < 0.022. Various other parameters such as radiation pattern, reflection coefficient, Isolation, multiplexing efficiency, ECC, DG and peak gain are discussed in detail for experimental validation.