Studying The Effects of High Order Roots of Array Factor Polynomial On Phased Array's Beamwidth

Phased array antennas must scan a wide range of space and find the proper direction to send/receive the allocated data. It is desired to find the user directions and also interferer directions to aim the main beam of the array into the desired user and place nulls along interferer directions. There is always a trade off between the number and size of elements and the pattern beamwidth. This article shows how high order roots of array factor can assist in narrowing the overall beamwidth. For this purpose a computer program was written in MATLAB and the simulation results is included