We engineered Com-Power AL-130R Active Loop Antennas for emissions testing for the range of 9 kHz to 30 MHz. With its remote access, you can monitor and control the antenna from as far as 30 mtrs.
What is a loop antenna? How does a loop antenna work?
A circular loop or spiral of wire, conduit, or another conducting material makes up a loop antenna, a radio antenna. The loop's dimensions, form, and positioning can all change, affecting how well the antenna works. Electromagnetic induction is the general operating principle of loop antennas. An alternating magnetic field is created by radio frequency (RF) energy, and this field causes a current to flow through the loop. Radio transmission is made possible by this current's electric field, which radiates energy as an electromagnetic wave.
A loop antenna's operating frequency and dimensions significantly impact its efficiency. Magnetic loop antennas, which are smaller loops, exhibit increased sensitivity to the magnetic component of electromagnetic fields.
Advantages and application of a loop antenna
The AL-130R is an Active Loop Antenna (loop size: 19” x 19” [0.5 m x 0.5 m] with electrostatic shield), operating over the frequency range of 9 kHz to 30 MHz. It has a built-in, low-noise preamplifier, which increases overall measurement sensitivity as well as the overall signal to noise ratio. The antenna is battery powered (rechargeable 6V NimH battery pack). The AL-130R can also be powered by the supplied charger/power adapter. The front panel has LED indicators for RF ON/OFF, power, battery low, amplifier saturation, as well as charging status.
The AL-130R Active Loop Antenna is intended for use as an EMI test antenna for qualification-level regulatory compliance measurements per most commercial product test procedures including, but not limited to, ANSI C63.4, along with most CISPR, EN, ETSI standards.
As per ANSI C63.4-2014, the use of an 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 RAI-100 Remote Antenna Interface comes in very handy for this application.
The RAI-100 is a compact controller which is used to enable/disable the RF measurement circuit and monitor saturation and battery low indicators remotely via a fiber optic cable up to 30 mtrs in length.