3-D Printed Circularly Polarized Dielectric Flat Lens Antennas for Terahertz Applications

• Published in: International Conference on Microwave and Millimeter Wave Technology proceedings Vol. 1; pp. 1 - 3
• Main Authors: Feng, Peng-Yu, Xue, Jin-Yang, Hou, Ling-Li, Lin, Zhipeng
• Format: Conference Proceeding
• Language: English
• Published: IEEE 16.05.2024
• Subjects: 3-D printing; circularly polarization (CP); dielectric lens; Dielectrics; Filtering; Millimeter wave technology; periodic structures; Resins; Solid modeling; terahertz (THz); Terahertz radiation; Three-dimensional printing
• ISSN: 2994-3124
• DOI: 10.1109/ICMMT61774.2024.10672365

This paper gives the design concept of a 3-D printed circularly polarized (CP) flat dielectric lens antenna at 340 GHz, which is with the cross-polarization filtering ability. The antenna element is composed of a triangular prism structure on the top to achieve the impedance matching, a part of cylindrical dielectric post in the middle as the phase compensator, as well as a square dielectric post on the bottom as the supportor. Under the illumination of a CP wave, a 2ψ transmission phase shift will be produced by rotating the element with an angle of ψ about the z-axis. Notably, the designed element is inherently with a polarization filtering ability, because it behaves distinctively to the incident CP waves with right or left chiralities. To prove the proposed design concept, a flat dielectric lens with 27×27 elements is arranged. After full-wave simulations, it can be found that the proposed THz dielectric flat lens antenna possesses good main beams as well as low axial ratio of CP waves.