2018 International Symposium on Antennas and Propagation (ISAP 2018) [WeD1-2] October 23~26, 2018 / Paradise Hotel Busan, Busan, Korea An Element-Staggered, Wide-Angle Beam Scanning Transmitarray Antenna with Four Focuses Design Nan-nan Wang, Bing-xu Zhao, Mu Fang, Jing-hui Qiu School of Electronics and Information Engineering Harbin Institute of Technology Harbin, 150080, China
[email protected] Li-Yi Xiao Microelectronics Center, Harbin Institute of Technology, Harbin, 150080, China Abstract – A wide-angle beam-scanning low side lobe level transmitarray antenna which is working in Ka-band is put 2. Transmitarray Design forward in this paper. The proposed transmitarray is consist of a transmitting surface with four-layer subwavelength Fig. 1 shows the structure of the proposed transmitarray circular patch elements which are in staggered arrangement antenna. The transmitting surface is composed of 21 21 and a movable feed. Four focuses design is used for reducing four-layer square patch elements. Three dielectric the phase error and the loss of gain caused by rotating the feed. The simulation results demonstrate that the loss of gain substrates are made of Rogers RT5880 with thickness of is less than 1.2 dB, the side lobe level is lower than -17.8 dB 0.508 mm, relative permittivity of 2.2, and loss tangent of during the scanning range of ±30 degrees at typical frequency 0.0012. The element dimensions is 3.3 3.3 mm2 of 35 GHz. The excellent performance shows that it can be (equivalently 0.385 0.385 ). The four-layer metal used for millimeter wave imaging system.