Gain compensated conformal antennas with pattern diversity for mmWave 5G smartphones

Three essential data modes are observed for mobile terminal data usage and hence three conformal elements are presented with shared ground for least physical footprint with reduced SAR. First, a strongly resonant inset fed microstrip patch antenna with 90° bend is investigated which offers an impedance bandwidth of 2 GHz centered at 28 GHz and a forward gain of 9 dBi for an effective radiating volume of 0.082λ
₀
³
. The second element is a conformal tapered slot antenna optimized for the corner bend which resonates at 28 GHz with a gain of 7 dBi. The third element is a conformal tapered slot antenna loaded with a parasitic ellipse with a gain of 9 dBi and aperture efficiency of upto 80%. All the three elements are integrated with a common ground for pattern diversity.