1. Characteristics of finite reflectors and one-element loop antenna;Sekiguchi;Trans. I.E.C.E., Japan,1976
2. Analysis of loop antenna with circular reflectors with wedge angle;Iwashigi;Trans. I.E.C.E., Japan,1980
3. Directivity of loop antennas with rectangular reflectors;Iwashige;Trans. I.E.C.E., Japan,1979
4. Measured impedance of vertical antennas over finite ground planes;Meier;Proc. IRE,1948
5. The radiation pattern of an antenna over a circular ground screen;Storer;J. Appl. Phys.,1952