A microwave communications system space loss calculation formula is
A. 92.4 + 10 log f +20 log d
B. 94.2 + 10 log f +20 log d
C. 92.4 + 20 log f +20 log d
D. 94.2 + 20 log f +20 log d
A. 92.4 + 10 log f +20 log d
B. 94.2 + 10 log f +20 log d
C. 92.4 + 20 log f +20 log d
D. 94.2 + 20 log f +20 log d