title: A Circular Polarizer with Beamforming Feature Based on Frequency Selective Surfaces.
abstract: We propose a circular polarizer with beamforming features based on frequency selective surface (FSS), in which a modified anchor-shaped unit cell is used to reach the circular polarizer function. The beamforming characteristic is realized by a particular design of the unit-phase distribution, which is obtained by varying the scale of the unit cell. Instead of using plane waves, a horn antenna is designed to feed the phase-variant FSS. The proposed two-layer FSS is fabricated and measured to verify the design. The measured results show that the proposed structure can convert the linearly polarized waves to circularly polarized waves. Compared with the feeding horn antenna, the transmitted beam of the FSS-added horn is 14.43° broader in one direction, while 3.77° narrower in the orthogonal direction. To our best knowledge, this is the first time to realize circular polarizer with beamforming as the extra function based on FSS, which is promising in satellite and communication systems for potential applications due to its simple design and good performance.
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing, 210096, China.
authors.forename: Jia Yuan
authors.initials: JY
authors.lastname: Yin
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing, 210096, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Wan
authors.affiliation: State Key Laboratory of Millimeter Waves and Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Ren
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Cooperative Innovation Center of Terahertz Science, Chengdu 611731, China.
authors.forename: Tie Jun
authors.initials: TJ
authors.lastname: Cui