MICRONIX

Magnetic Field Strength Measurement with Loop Antenna

Loop antenna, Low noise amplifier , Signal analyzerで100kHz to 30MHzの磁界強度を測定できます。

[Application]

[Connection block diagram]

Figure:Handheld signal analyzer MSA 538, Loop antenna and low noise amplifier MAP 301 are connected.

[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.

Scroll
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

*MICRONIX Corporation reserves the right to make changes in design, specification and other information without prior notice.

[Products introduction]

2015/4

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