A Dual-polarized Lens Antenna Using LTCC Based Phase-shifting Surface for D Band Applications

This paper proposed a new design method to achieve a 155GHz dual-polarized (DP) antenna. In this paper, a novel lens structure by using only one dielectric substrate in introduced. The lens is realized based on low-temperature co-fired ceramic (LTCC) technology. It functions as a phase shifting surface for the antenna, resulting in a high antenna gain. In order to realize the dual-polarized radiation characteristic, an LTCC-based DP feeding source is designed with wideband and DP radiation characteristics. In order to verify the design principles, a DP LTCC lens antenna operating at D band is designed and fabricated. It consists of the feeding source, the LTCC-based lens and a 3D printed supporter. It yields a horizontal-polarized peak gains of 19dBi and a vertical-polarized peak gain of 18.7dBi. The simulated bandwidth of the two polarizations is around 13%. The simulated results shows that the proposed antenna is a good candidate for sub-millimeter wave application.