10 Meter Antenna Data

CALCULATIONS

EMISSIONS TESTING

Individual calibration data for the log periodic antenna is supplied at appropriate distances (3, and 10 meter) to comply with various emissions test requirements. For emissions measurements, add antenna factor plus cable loss to receiver reading in dBuV to convert to field strength in dBuV/meter.

FS = Field Strength in dBuV/m

SA = Spectrum Analyzer or Receiver voltage reading

AF = Antenna Correction Factor

CL = Cable Loss in dB

IMMUNITY TESTING

For Immunity measurements, the generated electric field strength can be calculated by:

FS = Approximate Field Strength in (V/m)

P = Power in watts

g = Numeric Gain

d = Distance in meters

10 Meter Antenna Factor
Frequency (MHz)	AF (dB/m)	Gain (dBi)	Gain (Numeric)
700	25.2	1.9	1.56
800	21.0	7.3	5.40
900	21.6	7.7	5.94
1000	22.6	7.6	5.81
1250	23.1	9.1	8.06
1500	23.6	10.2	10.36
1750	24.5	10.6	11.54
2000	27.1	9.2	8.32
2500	27.6	10.6	11.54
3000	29.2	10.6	11.39
3500	29.6	11.5	14.23
4000	31.6	10.7	11.65
4500	31.9	11.4	13.88
5000	33.4	10.8	12.11
5500	33.0	12.0	16.02
6000	33.6	12.2	16.50
6500	34.5	12.0	15.93
7000	35.4	11.8	15.11
7500	35.7	12.1	16.19
8000	36.2	12.1	16.31
8500	36.8	12.0	15.98
9000	36.9	12.4	17.32
9500	37.0	12.8	19.14
10000	37.2	13.0	20.15
10500	37.5	13.2	20.68
11000	37.8	13.3	21.17
11500	38.1	13.3	21.63
12000	39.2	12.6	18.13
12500	39.5	12.7	18.67
13000	40.1	12.4	17.51
13500	39.5	13.3	21.61
14000	39.9	13.3	21.16
14500	41.4	12.1	16.24
15000	40.5	13.3	21.40
15500	38.5	15.5	35.86
16000	37.5	16.8	47.69
16500	39.7	14.9	31.03
17000	40.9	13.9	24.82
17500	42.1	13.0	19.83
18000	42.3	13.1	20.40