Revision as of 11:54, 30 December 2010 edit Yobot (talk \| contribs) Bots 4,733,870 edits m WP:CHECKWIKI error fixes + general fixes, References after punctuation per WP:REFPUNC and WP:PAIC using AWB (7510) ← Previous edit		Revision as of 22:18, 19 September 2011 edit undo Chris the speller (talk \| contribs) Autopatrolled, Extended confirmed users, Pending changes reviewers 894,449 edits m →Example: Typo fixing per WP:HYPHEN, sub-subsection 3, points 3, 4, 5, replaced: fully- → fully , partially- → partially using AWB (7794) Next edit →
Line 15: From these three facts, it is clear that if the synthesized aperture has an area ''A'', and the total area of it that is filled by active transmitters is ''a'', then at most a fraction ''a''/''A'' of the radiated power reaches the target, and the fraction 1 - ''a''/''A'' is lost. This loss shows up in the form of power in [[side lobe]]s. This theorem can also be derived in more detail by considering a partially- filled transmitter array as being the superposition of a fully- filled array plus an array consisting of only the gaps, broadcasting exactly out of phase with the filled array. The [[Interference (wave propagation)\|interference]] pattern between the two reduces the power in the main beam lobe by exactly the factor 1 - ''a''/''A''. Note that the thinned array curse applies only to [[mutual coherence (physics)\|mutually coherent]] sources. If the transmitting sources are not mutually coherent, the size of the ground spot does not depend on the relationship of the individual sources to one another, but is simply the sum of the individual spots from each source.

Thinned-array curse: Difference between revisions