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BASIC Source File
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1994-06-23
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580b
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16 lines
5 PRINT "GAIN, DIRECTIVITY AND POWER DENSITY FOR A PARABOLIC ANTENNA."
6 PRINT
10 INPUT "WHAT IS THE DIAMETER OF THE PARABOLIC DISH IN FEET "; D
20 INPUT "WHAT IS THE FREQUENCY IN MHz "; F
30 L = F/(300*30.48)
40 GA = .55*(((355/113)*D)^2)/L
50 GI = 4.343*LOG(GA)
60 GD = GI - 2.15
70 PRINT "GAIN IN dB OVER A DIPOLE IS "; GD
80 H = (70*L)/D
90 DD = 4.343*LOG(41253!/(H^2)) - 2.15
100 PRINT "DIRECTIVITY IN dB OVER A DIPOLE IS "; DD
110 INPUT "WHAT IS THE AVERAGE POWER IN WATTS "; P
120 PD = 158.4 * .001 * P/(D^2)
130 PRINT "POWER DENSITY IN mW/cm^2 IS "; PD