A Design of Millimeter Waveband Lens Antenna to Improve Gain

This paper studied the application of quasi-conformal transformation optics (QCTO) theory to millimeter wave terminal lens antennas, cylindrical Luneburg lens theory and QCTO theory are combined to design an anamorphic lens. The deformed lens meets the antenna's requirement of miniaturization and is easy to install. Coordinate transformation is performed by using COMSOL Multiphysics to calculate the relative permittivity distribution of the lens. In order to simplify the design and facilitate the processing, the lens was effectively approximated and discrete. The ANSYS HFSS simulation software is used to simulate the array antenna loaded with discrete and sparse lenses. The results show that the QCTO anamorphic lens can significantly improve the gain of the millimeter wave array antenna under dual-frequency and dual-polarization.