Active Loop Antennas

Loop antennas operate on the principle of electromagnetic induction, which is crucial in both EMC testing and EMI testing. An alternating magnetic field generated by RF energy induces a current in the loop. This current, in turn, produces an electric field that radiates energy as an electromagnetic wave. The performance of these antennas is significantly influenced by the size of the loop and its operating frequency. Smaller magnetic loop antennas are particularly sensitive to the magnetic component of electromagnetic fields, making them ideal for detecting low-frequency interference and serving as effective test equipment for accurate EMC measurements.

The Model AL-130R is compliant with CISPR 16-1-4.

• It is ideal for emissions measurements as required by various EMC standards such as FCC 18, CISPR 11, CISPR 13, CISPR 14, CISPR 32 and many more.
• The built-in, low-noise preamplifier, increases overall measurement sensitivity as well as the overall signal to noise ratio.
• As per ANSI C63.4-2014, the use of active loop antenna for compliance testing is permitted in a non-sheilded environment ONLY if the saturation indicator is continuously monitored during the course of testing.
• Com-Power’s Remote Antenna Interface (RAI-100) comes in very handy for this application. 
• It is a compact controller which can be used to enable/ disable RF measurement circuits and to monitor saturation and battery low conditions remotely via a fiber optic cable up to 30 mtrs in length.