Analysis of wavelength-scaled array architectures via domain decomposition techniques for finite arrays

Wavelength-scaled array architectures use scaled elements to achieve ultra-wideband array performance with significantly fewer overall radiators than traditional ultra-wideband arrays consisting of a single element type. Given a requirement for an 8:1 bandwidth array of a given aperture size, an array of equivalent aperture and bandwidth is created from scaled elements of three sizes. The proposed wavelength-scaled equivalent architecture has 16% of the original element count with a comparable reduction in electronics required to feed the array, leading to significant cost savings. Because of the complex electromagnetic environment of the wavelength-scaled architecture, infinite array design tools cannot be used — rigorous analysis methods using Domain Decomposition techniques for finite arrays are necessary to design and validate performance.