Nonuniformly Spaced Array Elements

<p>This thesis provides a method to reduce physical resource requirements along with cost reduction in Space Based Radar (SBR) platforms and provides a rule of thumb for randomization effects on arrays. A trend analysis is performed on 4 8 12 and 16 square meter arrays. Three aperiodic thinning approaches are examined. They are an equal current density element distribution a random periodic grid of elements and random element distribution based a peak sidelobe indicator. According to the metrics used the statistical and deterministic array thinning approaches performed best for these small arrays. However the statistical arrays have a scan angle limitation of OO=30?? due to the interelement spacing of two wavelengths. The deterministic does poorly with peak sidelobes. The random array performance was limited due to the relatively small array sizes for the random approach used. The small size limits the array's capability to meet the peak sidelobe threshold requirement due to a reduced confidence level along with limiting the effective area to be randomized. However as the array size increased the thinning levels and performance increased to become competitive with the other array approaches. If trends continue as array size increases the random array is the ideal solution.</p><p>This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact and remains as true to the original work as possible. Therefore you will see the original copyright references library stamps (as most of these works have been housed in our most important libraries around the world) and other notations in the work.</p><p>This work is in the public domain in the United States of America and possibly other nations. Within the United States you may freely copy and distribute this work as no entity (individual or corporate) has a copyright on the body of the work.</p><p>As a reproduction of a historical artifact this work may contain missing or blurred pages poor pictures errant marks etc. Scholars believe and we concur that this work is important enough to be preserved reproduced and made generally available to the public. We appreciate your support of the preservation process and thank you for being an important part of keeping this knowledge alive and relevant.</p>