A Low-Profile SIW-Based CTS Array with Reconfigurable Four Beams and Dual Polarizations for K-Band Sensing

• Main Authors: Chen, Y. (Author), Ding, Y. (Author), Jin, Y. (Author), Luo, Y. (Author), Qian, F. (Author), Yang, G. (Author), Zou, Z. (Author)
• Format: Article
• Language: English
• Published: MDPI 2022
• Subjects: Antenna arrays; Antenna lobes; Continuous transverse stub; continuous transverse stub (CTS); dual polarizations; Dual-polarizations; K bands; Line sources; Low-profile; Microwave antennas; Millimeter waves; millimeter-wave antennas; Millimeter-wave antennas; Polarization; Radar antennas; Radiators; Reconfigurable; Reconfigurable beam; reconfigurable beams; Scanning antennas; Substrate integrated waveguides; Substrate-integrated waveguides; Substrate-integrated-waveguide; substrate-integrated-waveguide (SIW)
• Online Access: View Fulltext in Publisher

 A dual-polarized continuous transverse stub (CTS) K-band antenna with reconfigurable four beams and low profile is proposed based on substrate-integrated-waveguide (SIW) design. It consists of a line source generator (LSG) on the bottom surface, a spherical-wave to plane-wave transforming part on the middle layer, and CTS radiators on the top surface. Particularly, the LSG has four SIW-based H-plane horns, and a chip is integrated to switch among the two pairs of horns, so as to transfer the quasi-TEM waves on the bottom surface by a ±10◦ deflection angle to the middle layer for the CTS radiators on the top surface, resulting in four reconfigurable scanning beams with 10◦ for two polarizations. The measurements show that it realizes four reconfigurable beams with a 25.8 dBi gain at 24 GHz, verifying the design. The proposed antenna takes into account the advantages of reconfigurable multi-beam, dual polarization, low side lobes, low profile, and high gain, which can be applied to K-band sensing, especially for wind profile radars. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.