Thinned-array curse: Difference between revisions

Revision as of 09:08, 11 December 2008

Revision as of 21:52, 3 January 2009

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Thus:

1.# The array is radiating the same amount of power (since each individual sub-aperture making the array radiates a constant amount of power whether or not it is adjacent the next aperture).

# It has the same power per unit area at the center of the receiving spot on the ground.

2.# It has the same power per unit area at the center of theThe receiving spot on the ground is smaller.

3. The receiving spot on the ground is smaller.

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.