Research and Development of Corporate-feed Waveguide Slot Array Antennas in 120GHz and 350GHz Bands

This talk presents the research and development of the corporate-feed waveguide slot array antennas in 120GHz and 350GHz bands. The full corporate-feed gives wideband characteristics. Low-loss electrical contact is achieved by laminating several metal plates with different waveguide structures and bonding with mechanical pressure and high temperature in a vacuum. The 120GHz-band antenna has fabricated by diffusion bonding of laminated thin metal plates. The 350GHz-band antenna introduces gold-coating silicon wafers for high precision in the fabrication. The perpendicular corporate-feed is introduced by removing the side walls of the cavities to simplify the radiating layer. A two-dimensional monopulse circuit is integrated with the antenna to achieve polarity orthogonal multiplexing in the rectangular coordinate system for non-far field region to increase the transmission capacity.