This paper investigates high frequency (HF) radiation capabilities of a two mast, canonical ship using characteristic mode theory and distributed array design. Two ring arrays of 18 electrically small dipole radiators (.1λ) are designed to be circularly distributed between a two mast canonical shipboard structure. Consequently, the entire superstructure becomes the main radiator where its radiative capabilities can be controlled from its two mast superstructure. The two masts are spaced approximately .3λ from one another at the design frequency of 3.4 MHz. Numerical simulations are performed using MATLAB, HFSS, and FEKO computational electromagnetics software in order to demonstrate and examine the radiative and beam steering modal pattern characteristics.
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