Ka频段双圆极化相控阵天线设计_柏艳英.pdfVIP

36 11 Vol.36 No.11 2017 11 ELECTRONIC COMPONENTS AND MATERIALS Nov. 2017 Ka : 8×8 Ka 3 dB 2×2 8×8 HFSS 360°±60 3 dB30% : Ka doi: 10.14106/ki.1001-2028.2017.11.009 TN702 A 100111-0047-05 Design of Ka-band dual circularly polarized phased array antenna BAI Yanying (Southwest China Institute of Electronic Technology, Chengdu 610036, China) Abstract: An 8×8 Ka-band dual circular polarization phased array antenna was designed. The antenna elements were multilayer microstrip antennas and each element was coupled fed by two orthogonal slots and consists of a miniaturized broadband 3 dB branch-line coupler (BLC) to achieve dual circular polarization. In order to improve the performance of the circular polarization of the proposed antenna, four elements were rotated in turn to form a 2×2 dual circular polarization sub-array. Based on the 2×2 sub-array, an 8×8 phased array antenna was fabricated. The HFSS simulating results show that the array antenna can scan in the range of 60° and the azimuth of 360° with dual circular polarization. The axial ratio is less than 3 dB and the axial ratio bandwidth is up to 30%. The research of this array antenna can be used for the design of dual circular polarization phased array antenna of satellite communication. Key words: Ka-band; phased array antenna; dual circularly polarized; branch-line coupler; rotating array element technique; satellite communication X S Ka