E-Band Full Corporate-Feed 32 × 32 Slot Array Antenna With Simplified Assembly

This letter presents a high-gain 32 × 32-element full corporate-feed array antenna using simplified assembly of only two split blocks. is made possible by new feeding configuration which eliminates the cavity-backed layer used in conventional designs. E-plane T-junctions, as well single-ridge waveguide output structure, are network to reduce its size. helps realize one-to-one corresponding excitation between port feed and radiation slots. In addition, transition structure from double-ridge employed improve impedance matching bandwidth part. For demonstration, prototype designed, fabricated, measured. Experimental results show that achieves an 19% (71-86 GHz) with input reflection coefficient better than -13 dB, efficiency over 76.4%, peak gain 38.4 dBi entire operating band.