A Wideband High Gain Taper Slot Antenna for 5G Millimeter-wave Imaging System Application

This paper presents a wideband coplanar waveguide (CPW) feed taper slot antenna. A microstrip-line-to-slot transition structure is used to excite the slot radiator. Wideband performance is realized by the aperiodic continuously scaled structure. The fabricated antenna prototype features a compact size of 61 × 25 × 0.16 mm³. Measurement results show this antenna achieves better than 10 dB return loss within an ultra-wideband (10–40 GHz). The measured peak gain within this band ranges from 6 to 12.5 dBi. The wideband characteristic makes this antenna attractive in 5G wideband phased-array beamformer and wideband imaging system applications.