Measurements of a $64\mathrm{x}64-$-Way One-Body Two-Dimensional Beam-Switching Hollow-Waveguide Butler Matrix

This paper presents the measured results of a 64×64-way one-body two-dimensional beam-switching Butler matrix using hollow waveguide structure at 19.55 GHz. The one-body two-dimensional switching matrix is realized by introducing the waveguide short-slot 2-plane couplers as hybrid and cross junctions. The 64 beams can cover 39.5% hemisphere by 0.65-wavelength aperture spacing in simulation. The measured beam coverage is almost the same to the simulated one.