Synthesis of Multi-Beam Circular Antenna Array with DOA Possibility

A simplified way for constructing multi-beam circular antenna array with a small number of radiators is considered. To produce a system of beams, a reflective type beam-forming network is used, and algorithms for its synthesis are proposed, taking into account the mutual coupling of radiators and to fulfil the “lossless” restriction on the network while synthesis procedure. The possibility of Direction of Arrival (DOA) estimation using such an array is demonstrated using algorithms similar to the Watson-Watt and sum-difference methods.