CALIBRATIONS
0.14MHz to 1MHz E field receiving and transmitting antenna
The antenna factor AF (AF=E/V) calibration at 1m is shown below:
The power gain is shown below:
The radiated power Pd = Gain x Pin/ 12.56 x r
Where Pin = input power
R= distance meters
Gin = power gain
The E field is = Square root(Pd x Zw)
Zw = wave impedance = 377 x lambda/ 12.56 x r
Thus at 1m distance and 0.26MHz the wave impedance is 34633 Ohms.
Resonant H field injection probe at 13.65MHz
| H field A/m | input voltage (rms) |
|---|---|
| 1 | 0.017284 |
| 5 | 0.08642 |
| 10 | 0.17284 |
| 20 | 0.34568 |
| 30 | 0.51852 |
| 40 | 0.69136 |
| 50 | 0.8642 |
| 60 | 1.03704 |
| 70 | 1.20988 |
| 80 | 1.38272 |
| 90 | 1.55556 |
| 100 | 1.7284 |
| 110 | 1.90124 |
| 120 | 2.07408 |
| 130 | 2.24692 |
| 140 | 2.41976 |
| 150 | 2.5926 |
| 160 | 2.76544 |
| 170 | 2.93828 |
| 180 | 3.11112 |
| 190 | 3.28396 |
| 200 | 3.4568 |
| 210 | 3.62964 |
| 220 | 3.80248 |
| 230 | 3.97532 |
| 240 | 4.14816 |
| 250 | 4.321 |
10cm H field injection probe 0.1MHz to 22MHz
Step up/step down transformer
Step up calibration
| Freq (MHz) | Ratio |
|---|---|
| 0.01 | 3 |
| 0.1 | 3 |
| 0.2 | 3.2 |
| 0.3 | 3.2 |
| 0.4 | 3.4 |
| 0.5 | 3.2 |
| 0.9 | 3.2 |
| 1 | 3 |
| 1.3 | 2.8 |
| 1.4 | 2.8 |
| 1.5 | 3 |
| 1.7 | 2.8 |
| 2 | 3 |
| 8 | 2.8 |
| 8.5 | 2.7 |
| 9.5 | 2.7 |
| 10 | 3 |
Step down calibration
| Freq (MHz) | Ratio |
|---|---|
| 0.01 | 0.4 |
| 0.02 | 0.37 |
| 0.03 | 0.35 |
| 0.04 | 0.37 |
| 0.05 | 0.48 |
| 0.08 | 0.37 |
| 0.1 | 0.37 |
| 0.14 | 0.32 |
| 0.2 | 0.37 |
| 0.7 | 0.37 |
| 0.8 | 0.31 |
| 0.9 | 0.31 |
| 1.5 | 0.29 |
| 2 | 0.26 |
| 2.2 | 0.22 |
| 2.4 | 0.25 |
| 3 | 0.2 |
| 3.5 | 0.18 |
| 4 | 0.18 |
| 5 | 0.12 |
| 10 | 0.1 |
Bow tie calibration in an anechoic chamber
Bow tie calibration at 0.2m
Ultra broadband 30MHz to 2400MHz antenna calibration
The height of the monopole section can be set to either 0.4m or 0.8m. The frequency range at 0.4m is 79MHz to 712MHz and at 0.8m 30MHz to 350MHz. The frequency range of the bulbous antenna is 350MHz to 2400MHz. Thus the total frequency range is 30-2400MHz when in the 0.8m configuration.
The power density at 20km with a 5W input power and the 0.8m configuration
The power density at 20km with a 5W input power and the 0.4m configuration of the BB monopole
Gain of the 0.8m configuration of the BB monopole 80MHz to 350MHz
Gain of the 0.4m configuration of the BB monopole 80MHz to 712MHz
Antenna factor (AF) of the 0.8m configuration of the BB monopole 30MHz to 350MHz (AF = Electric field magnitude / voltage induced into the antenna load)
Antenna factor (AF) of the 0.4m configuration of the BB monopole 80MHz to 712MHz. (AF = Electric field magnitude/ Voltage induced into the antenna load)
Power density of the bulbous antenna at 20km with a 5W input power 350MHz to 2400MHz
Bulbous antenna gain 350MHz to 2400MHz
Antenna factor (AF) of the bulbous antenna 350MHz to 2400MHz
(AF = Electric field magnitude / Voltage induced into the antenna load)
-of-the-bulbous-antenna-350mhz-to-2400mhz.jpg)
7.5cm and 10.5cm stripline calibration
