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CALIBRATIONS

0.14MHz to 1MHz E field receiving and transmitting antenna

The antenna factor AF (AF=E/V) calibration at 1m is shown below:

0.14MHz to 1MHz E field  receiving and transmitting antenna

The power gain is shown below:

Power Gain

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

9cm x 7cm x 6mm H field resonant injection probe at 13.65MHz


10cm H field injection probe 0.1MHz to 22MHz

10cm H field injection probe 0.1MHz to 22MHz


Step up/step down transformer

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 Up Transformer

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 Antenna Factor at 1m


Bow tie calibration at 0.2m

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

Power density of 0.8m height BB monopole at 20km


The power density at 20km with a 5W input power and the 0.4m configuration of the BB monopole

0.4m height BB Monopole pd at 20km


Gain of the 0.8m configuration of the BB monopole 80MHz to 350MHz

0.8m BB Monopole Gain


Gain of the 0.4m configuration of the BB monopole 80MHz to 712MHz

0.4m Height BB Monopole Gain


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 BB Monopole Height = 0.8m


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)

Antenna Factor BB Monopole Height = 0.4


Power density of the bulbous antenna at 20km with a 5W input power 350MHz to 2400MHz

Radiated Power With 5W Input to Bulbous Antenna


Bulbous antenna gain 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)

Antenna factor (AF) of the bulbous antenna 350MHz to 2400MHz (AF = Electric field magnitude / Voltage induced into the antenna load)


7.5cm and 10.5cm stripline calibration

7.5cm and 10.5cm Stripline Calibration

10.5cm Stripline Calibration for 50V/m