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A large grating lobe appears for an 8 element array with a uniform spacing 0.8 λ when it is steered to 45°.
A non-uniformly spaced conformal array of microstrip patch antenna elements of length L, width w, and substrate thickness h.
Aperiodic arrays can have widely varying driving point impedances during scanning. To mitigate these effects the VSWR of each antenna element is bounded under 2:1 by using a GA to adjust the probe positions and element spacings.
A conformal array of microstrip patch antennas uniformly spaced at 0.85λ is perturbed using a GA to create an aperiodic array which simultaneously meets the grating lobe constraint and driving point impedance requirements.
The scan volume of a thinned periodic linear phased array is proportional to the spacing between array elements. As the spacing between elements increases beyond a half wavelength, the scan range of the array will be significantly reduced due to the appearance of grating lobes. This research investigates a method of creating thinned aperiodic linear phased arrays through genetic algorithms that will suppress the grating lobes with increased steering angles. In addition the genetic algorithm will place restrictions on the driving point impedance of each element so that they are well behaved during scanning.
The scan volume of a thinned periodic linear phased array is proportional to the spacing between array elements. As the spacing between elements increases beyond a half wavelength, the scan range of the array will be significantly reduced due to the appearance of grating lobes. This research investigates a method of creating thinned aperiodic linear phased arrays through genetic algorithms that will suppress the grating lobes with increased steering angles. In addition the genetic algorithm will place restrictions on the driving point impedance of each element so that they are well behaved during scanning.
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