basic avoing grating lobe formula logic

Thread Starter

yef smith

Joined Aug 2, 2020
366
hello,I have this formula bellow expression 1.72
p=1 (grating lobe of the first order) and we have expression 1 shown bellow.
we have the condition for no grating lobe called expression 2.
i know the sine is smaller then 1 but why is that a guarntee that no grating lobe will accure?
Thanks.
expression 1:
\[ \frac{d}{\lambda}=\frac{1}{sin(\theta)-sin(\theta_0)} \]


expression 2:
1650836237272.png
1650835889035.png
 
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