Investigation of Thin Wire Circular Loop Antennas and Electronically Scanned Circular Arrays

摘要

This report gives the theory of circular antenna arrays around cylinders. A resume of the theory of simple circular arrays is given, and both the complete far-zone field, and an expansion into spherical modes is obtained. Both the far-zone pattern and an integral form for the impedance of a dipole near an infinite cylinder are obtained by Fourier transform methods. By means of a limiting process, an approximate form is obtained for a dipole near a finite cylinder. It is shown that for all three cases: simple array, array around an infinite cylinder, and array around finite cylinder, the pattern can be placed in the same form. The application to pattern synthesis and electronic scanning is discussed. (Author)