Design of a compact four-element MIMO antenna with high isolation for millimeter-wave applications
This paper presents a compact 8 × 8 mm2 four-element Multiple Input Multiple Output antenna for 5 G frequency range (FR-2) operating over 23.68–31.88 GHz, derived from a mathematically shaped microstrip radiator on Rogers RT5880 with a partial-ground topology. The 4 × 4 × 0.25 mm3 (0.36λ0 × 0.36λ0 × 0.023λ0) single ele...