Millimeter wave Broadband Co-frequency Duplex Yagi Antenna Based on Self-packaged Multi-layer SISL

In this paper, a broadband co-frequency duplex Yagi antenna for 5G millimeter wave band is proposed based on the LTCC multi-layer SISL. The antenna structure is self-packaged and has excellent performance. The center frequency of the co-frequency duplex Yagi antenna is designed at 33.25GHz, and the 10dB impedance relative bandwidth is 25.6%. The transceiver port isolation of the antenna is 12.7dB, and the maximum gain is 6.3dB. The cross-polarization levels of the main radiation directions of the E and H planes of the antenna are below −15dB.