What is the distance between antennas to apply the Friss transmission – McqOptions

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1.	What is the distance between antennas to apply the Friss transmission equation in terms of antennas largest dimension?
A.	R » 2D2/λ
B.	R « 2D2/λ
C.	R » 2λ2/D
D.	R « 2λ2/D
Answer» B. R « 2D2/λ

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