The magnetic field strength measurement from 100kHz to 30MHz with Loop antenna, Low noise amplifier and Signal analyzer.
Application
Connection block diagram
![Figure:Handheld signal analyzer MSA 538, Loop antenna and low noise amplifier MAP 301 are connected.](/eng/image/application/MAN120_meas_j-00.jpg)
Solution
It is possible to display the magnetic field strength directly on the signal analyzer MSA538 by inputting a calibration coefficient values obtained by subtracting the gain of the low noise amplifier MAP301 from the antenna factor of the loop antenna MAN120.
Frequency (MHz) | Magnetic Antenna Factor (dB/m) (typ.) |
MAP301 Gain (dB) (typ.) |
Antenna Factor -MAP301 Gain [Calibration coefficient values] |
---|---|---|---|
0.1 | 13.5 | 55.0 | -41.5 |
0.15 | 10.1 | 55.1 | -45.0 |
0.2 | 7.7 | 55.1 | -47.4 |
0.3 | 4.5 | 54.9 | -50.4 |
0.5 | 1.1 | 54.9 | -53.8 |
0.7 | -0.8 | 54.7 | -55.5 |
1 | -2.3 | 54.7 | -57.0 |
1.5 | -3.3 | 54.5 | -57.8 |
2 | -4.0 | 54.4 | -58.4 |
3 | -4.2 | 54.2 | -58.4 |
5 | -4.5 | 54.1 | -58.6 |
7 | -4.1 | 53.9 | -58.0 |
10 | -4.1 | 53.8 | -57.9 |
15 | -4.2 | 53.7 | -57.9 |
20 | -4.0 | 53.6 | -57.6 |
30 | -4.5 | 53.5 | -58.0 |
System configuration
Signal analyzer [MSA538] | x 1 |
Loop antenna [MAN120)] | x 1 |
Low noise amplifier [MAP301] | x 1 |
SMA(P)/N(P)coaxial cable | x 1 |
SMA(P)/N(J)coaxial cable | x 1 |
Loop antenna stand | x 1 |
Products introduction
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