The magnetic field strength measurement from 100kHz to 30MHz with Loop antenna, Low noise amplifier and Signal analyzer.
Application
Connection block diagram
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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