ETS-Lindgren 3159 Biconical Antenna - Manual (Page 16)

16 | Operation
Calibration Data
T YPICAL A NTENNA F ACTOR AT 6M
C ALCULATED F ORWARD P OWER AT 3.5M
A calculation was used to derive the forward power data once the six-meter
calibration was complete. The following equation was used to determine the
power required to generate the desired field strength at a given distance when
antenna factors are known:
20 log 10 [E desired (V/m)]
20 log 10
20 log 10
1 15
With this equation you can calculate the forward power needed to generate
100 V/m at a given distance. Following is the performance for the Model 3159 at
3.5m: