Full-Metal Tri-Band Shared Aperture Antenna with High Power Capacity and Co-Axial Phase Center

In this paper, a tri-band shared aperture antenna is proposed for the multi-band transceiver in high power sensing application. The antenna has three independent band, the low-band and middle-band is from 1–14 GHz and 14–18 GHz. The high-band is located within Ka-band from 30–40 GHz. The tri-band antenna has the co-axial phase center for each band, and the antenna features full-metal structure which enable the high structural strength and power-handling capacity.