An Ultra-wideband (16 40 GHz) mmWave Antenna for Automotive Radar and 5G Applications

In this paper, we present a planar, ultra-wideband endfire antenna. To feed the radiating element, an ultra-broadband transition is designed. The proposed antenna achieves a fractional bandwidth of more than 85% with a moderate gain, which is above 3.1 dBi throughout the band with a maximum value of 5.5 dBi. The proposed antenna covers a wide frequency band of (16 GHz - 40 GHz) within small form factor (2.8λ
₀
× 1.87λ
₀
). The antenna is fabricated on a Rogers 3003 substrate (0.254mm) and the measured results exhibit an excellent match with the simulations.