Patent attributes
A hollow waveguide group antenna comprises a hollow waveguide extending in a direction in space and a plurality of chambers, each of which has a sending/receiving slit and is coupled to the hollow waveguide by a coupling slit. The sending/receiving slits are distributed at a fixed distance from each other, and the distribution of the coupling slits in the direction in space at the transversal hollow waveguide is selected differently from the distribution of the sending/receiving slits such that a wave propagating at the working frequency excites the sending/receiving slits with amplitudes and phases suitable for realizing a sector direction characteristic. The fixed distance is approximately 0.5λ0 for 90° sector direction characteristic and approximately 0.64 λ0 for a 45° sector direction characteristic.
