Generating highpower microwave with array feed offset paraboloid antenna

For generating high power microwave in free space the physical optics is used to analyze offset paraboloid antennas with three types of 7 element array horn feeds: one dimension sectorial horn array, two dimension triangle pyramidal horn array and two dimension triangle circular horn array. On condition that the maximum electric fields on the aperture of all the horns are equal, the array feeds radiate axial symmetrical main lobe and the antennas are with same reflector diameter, clean space and edge taper, the radiation characteristics of the antenna with sectorial horn array feed are the best of the three. However, the circular horn array has the most stable radiation directibity when the phase difference between the elements of the horn array is changed, the circular horn array is the b