Low-profile and wideband dipole antenna with unidirectional radiation pattern for 5G

Abstract

A low-profile wideband unidirectional dipole antenna is presented for the 5G operation. Parasitic strips are utilized for broadband impedance matching at a relatively small height of 4.9 mm (0.067λ₀, where λ₀ is the free-space wavelength at the center frequency). The measured results show that an impedance bandwidth of 55.4% is realized, ranged from 2.96 GHz to 5.23 GHz. The proposed antenna is with the merits of stable and symmetric unidirectional radiation patterns, low back-lobes and an average antenna gain of 7 dBi over the operating band, making it very promising for 5G system.