This paper concerns absorption of power from a regular plane wave by an, infinite linear array of evenly spaced equal groups of oscillating bodies. The angle of wave incidence is arbitrary.
As a result of constructive interference, plane waves may radiate from the array in certain directions. Those waves are quantitatively related to the, circular waves which radiate from each individual The power radiated by the rays of plane waves is related to an ‘array radiation resistance matrix’, which appears as a radiation resistance matrix for one group, but modified due to the presence of all the other groups of the array.
The maximum power absorbed from the incident wave is considered for the case of unconstrained amplitudes and the case of fixed body amplitudes. The interaction factor and the absorbed power per group are studied for an array of equal heaving point absorbers with fixed amplitudes. With no constraint on the amplitudes it is shown that total absorption of the incident wave is possible even for cases where the interspacing between the groups is larger than one wavelength, provided the number of parallel rows of heaving point absorbers is at least four.