Compact Dual-Polarized Continuous Transverse Stub Array With 2-D Beam Scanning

• Published in: IEEE transactions on antennas and propagation Vol. 67; no. 5; pp. 3000 - 3010
• Main Authors: Lou, Tian, Yang, Xue-Xia, Qiu, Houtong, Yin, Zhangfei, Gao, Steven
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.05.2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna arrays; Antennas; Apertures; Azimuth; Beam scanning; Circular polarization; continuous transverse stub (CTS); Dielectrics; dual polarization (DP); Dual polarization (waves); Elevation; Linear phase; Optical waveguides; phase-shifting surface (PSS); Phased arrays; Scanning; Substrate integrated waveguides; substrate-integrated waveguide (SIW); Two dimensional displays
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2019.2896554

A dual-polarized (DP) flat antenna array with passive 2-D beam-scanning capability is presented in this paper. The array consists of a DP continuous transverse stub (CTS) array, a flat Risley prism (FRP), and a line source generator. Two sets of CTSs, being constituted by the substrate-integrated waveguide (SIW), share a common aperture and are arranged orthogonally for the DP operation. A novel compact long line source is proposed for exciting this DP-CTS array. The FRP is realized by two linear phase progression phase-shifting surfaces (LPP-PSSs) and is placed above the DP-CTS array. The beam-scanning capability in the azimuth and in the elevation can be realized by rotating simultaneously the two LPP-PSSs in the same and in the opposite directions, respectively. A six-element array prototype is simulated and fabricated. According to the measured results, beam-scanning ranges of 40° in the elevation and 360° in the azimuth are achieved with the maximum gain of 17.8 dBi. The novel contributions from this paper include: 1) a novel compact long line source and 2) the first passive DP 2-D beam-scanning flat antenna array. This array can be extended easily to a higher gain or a circular polarization application.