MAGNETIC BEAM DEFLECTION DEVICES

摘要

A device (10) for changing the divergence of a beam of microwave radiation comprises a ferrite body (12) having an aperture through which the beam passes. Magnetic means in the form of a plurality of wires (20) passing both through the body (12) and across the aperture or in the form of a coil on either side of the aperture causes a differential phase delay as the beam passes through the aperture which broadens or narrows the beam.