Large Loop Antenna System according to CISPR 16-1-4 with 3 independant orthogonal loops with 3 m diameter and coaxial switching unit to measure the magnetic fieldstrength. The loop antennas are mounted on a non conductive support stand, equipped with a coaxial switch to select one of three loops. Ferrite braid chokes are supplied with the loop antenna system to supress unwanted sheath currents, which exceed the CISPR 16-1-4 requirements by far. Self resonances of the large loops are supressed by two resistive antenna slits per loop. The coaxial switch allows both, manual switching and remote switching by the EMI-receiver and software. The loop antenna system is intended for the use inside buildings.
The three axis loop antenna system measures the current induced in the loop caused by radiated magnetic fields. A typical application is the measurement of radiated disturbances of lighting equipment according to EN 55015 / CISPR 15 in the frequency range from 9 kHz to 30 MHz.
| Frequency range: | 9 kHz – 30 MHz |
| Loop diameter: | 3 m |
| Circumference of a loop: | 9.43 m |
| Cladding tube diameter: | 25 mm |
| Validation factor: | 79…100 dBΩ |
| Minimum spacing EuT-ring: | 0.3 m |
| Maximum EuT size: | 2.4 x 2.4 x 2.4 m |
| Nominal current transformer conversion ratio: | 1:1 (0 dB) |
| Transfer impedance of the current transformers: | 1.2 C +/- 0.2 C |
| Inductance per unit length: | 0.92 µH/m |
| Height of the horizontal loop: | ~ 2.05 m |
| Coaxial cable with double braided shield: | RG 223/U |
| Coaxial connector type: | BNC |
| Series Resistance of the ferrite absorbers: | > 300 Ohm @ 10 MHz |
| Dimensions: | 3.2 x 3.2 x 3.6 m |
| Weight: | 67 kg |