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# Magnetic field from a 1m x 1m swuare radiating coil

Note: these graphs show calculated
Z-axis (perpendicular to the radiating coil in X-Y plane) components
of magnetic field strength, relative to the value at the center of the coil.
## In a plane parallel to the radiating coil

### Z = 0m

### Z = 0.1m

### Z = 0.2m

### Z = 0.25m

### Z = 0.35m

### Z = 0.45m

## In a plane perpendicular to the radiating coil

### X = 0m

### X = 0.1m

### X = 0.25m

### X = 0.35m

### X = 0.45m

## Outside the radiating coil

### X = 0m

Magnetic field strength at center of rectangular coil of *w* × *h* (m)
may be calculated with:

For square coil of *w* × *w* (m), it may be simplfied to:

Inducatence of rectangular coil of *w* × *h* (m),
made from conductor with radius *r* can be estimated with:

For square coil of *w* × *w* (m), it may be simplfied to:

## Reference

*Equations for the Magnetic Field Produced by One or More Rectangular Loop*,
Martin Misakian,
Journal of Research of the National Institute of Standards and Technology,
Volume 105, Number 4, July–August 2000
*Electromagnetic Compatibility Handbook*, Kenneth L. Kaiser, 2004
- IEC 61000-4-8,
*Electromagnetic Compatibility (EMC)
- Part 4-8: Testing and Measurement Techniques - Power Frequency Magnetic Field Immunity Test*,
IEC

2012-05-05, T.Sato