Modular Circular Waveguide Antenna System For Arbitrary Pattern Synthesis In Scaled Measurement Environments

This contribution presents a design concept for an antenna construction toolkit for arbitrary symmetric pattern design in the Ku-band consisting of slotted circular waveguide elements. The design allows the adjustment of arbitrary amplitudes for the radiating elements using a rotatable aperture. No electric feeding network is needed as the radiators are excited using the fundamental waveguide mode and the amplitudes are adjusted in a solely mechanical way. The toolkit is designed after an existing antenna toolkit made from rectangular waveguide elements but presents benefits in manufacturing, usage and costs. Furthermore the design is easily scalable to other frequencies.