Compact Dual Port MIMO Antenna for X, Ku, K, Ka, and V Band Applications

Abstract

The miniaturized dual-element triple broadband Multiple-Input-Multiple-Output (MIMO) antenna is suggested. By creating a partial ground plane beneath the triple snake-head-shaped patch, three wide bandwidths are achieved. The investigated −10 dB impedance bandwidths are 10.2–18.4 GHz, 23.6–29.4 GHz, and 33.4–59.4 GHz, with the fractional bandwidth (FBW) 57.34%, 21.88%, and 56%, respectively. The isolation is improved by joining the microstrip line between the antennas in partial ground plane. The diversity performance of MIMO antenna is examined by the computational analysis of mean effective gain (MEG), diversity gain (DG), total active reflection coefficient (TARC), envelope correlation coefficient (ECC), ergodic channel capacity (CC), and channel capacity loss (CCL). Prototyping of the suggested design is carried out on FR-4 dielectric substrate with electrical dimensions 0.524λ₀ × 0.715λ₀ mm² (where λ₀ is free space wavelength at center frequency of lowest operating band), dielectric constant 4.4, and loss tangent 0.02. The isolation, ECC, peak gain, average total efficiency, and average CC over the operating bands 10.2–18.4 GHz, 23.6–29.4 GHz, and 33.4–59.4 GHz are (−18.8 dB, 0.027, 4.50 dB, 50.81%, 9.46 bps/Hz), (21.4 dB, 0.057, 4.92 dB, 57.03%, 9.74 bps/Hz), and (−31.8 dB, 0.0082, 5.79 dB, 45.9%, 9.22 bps/Hz), respectively. The proposed design covers X (40%), Ku, K (37.7%), Ka (69.2%), and V (55.4%) frequency bands. A good agreement was found between the measurement and simulation.