Isophoric arrays-massively thinned phased arrays with well-controlled sidelobes

摘要: Traditional filled phased arrays have an element placed in every location of a uniform lattice with half-wavelength spacing between the points. Massively thinned fewer than half elements their counterparts. Such drastic thinning is normally accompanied by loss sidelobe control. This paper describes class massively linear and planar that show well-behaved sidelobes spite thinning. The term isophoric derived from Greek roots to denote weight. In arrays, placement based on difference sets forces uniformly weighted spatial coverage. constraint array power pattern pass through V spaced, equal, constant values are less 1/K times main beam peak, where aperture size half-wavelengths K number array. net result reduced peak sidelobes, especially when compared cut-and-try random-placement approaches. An will exhibit this control even has been extent approximately square root V. Where more one must be generated at time, designs may used advantage within traditional By "interweaving" two subarrays appropriate cyclic shifting assignments over independent antenna patterns can generated, each region value 1/(2K) relative beam, subarray.