2019 Volume 8 Issue 7 Pages 275-280
A high-gain three-dimensional (3D) printed W-band reflector Fresnel lens antenna based on acrylonitrile butadiene styrene (ABS) is proposed for practical solution to achieve a low-cost and a high-gain antenna for a millimeter-wave radar system. Firstly, a 250-mm-diameter thin reflector Fresnel lens antenna are designed at center frequency of 76.5 GHz, based on a thick conventional reflector lens antenna. Then, assuming fabrication using high dielectric-loss materials, such as ABS plastics, the antenna characteristics difference of the two types of antennas are discussed using finite-difference time-domain (FDTD) analysis. Finally, a reflector Fresnel lens antenna is fabricated using commercially available 3D printer with a low-cost ABS filament. The measured gain and the azimuth half-power beamwidth are 36.0 dBi and 1.1°, respectively. These results agree well with the FDTD analysis result of 37.2 dBi.
