Antenna array excited by the radial waveguide

In the paper a number of design solutions of helical radiator arrays exited by radial waveguide was presented. It was also presented the power divider 1:18 executed on the base of the radial waveguide. The single, 18 elements array of radiators was described. Calculating results of reflection coefficient and radiation characteristics were presented as well. The analysis of large arrays containing 2 or 4 single antennas was carried out. It was indicated possibility of obtaining the monopulse characteristics in such large arrays. Calculating were conducted with the use of the CST MicroWave Studio computer program.