Which of the following is the necessary condition to avoid grating lobes in N-Isotropic element array?

\(\frac{d}{λ}≥\frac{1}{1+|cosθ_m |} \)

\(\frac{d}{λ}≤\frac{1}{1+|cosθ_m |} \)

\(\frac{d}{λ}≥\frac{1}{1+|cosθ_m |} \)

\(\frac{λ}{d}≤\frac{1}{1+|cosθ_m |} \)

\(\frac{λ}{d}=\frac{1}{1+|cosθ_m |} \)

Which of the following is the necessary condition to avoid grating lo

1.	Which of the following is the necessary condition to avoid grating lobes in N-Isotropic element array?
A.	\(\frac{d}{λ}≤\frac{1}{1+\|cosθ_m \|} \)
B.	\(\frac{d}{λ}≥\frac{1}{1+\|cosθ_m \|} \)
C.	\(\frac{λ}{d}≤\frac{1}{1+\|cosθ_m \|} \)
D.	\(\frac{λ}{d}=\frac{1}{1+\|cosθ_m \|} \)
Answer» B. \(\frac{d}{λ}≥\frac{1}{1+\|cosθ_m \|} \)