Active Magnetic Loop Antenna, 9 kHz to 30 MHz
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.
Construction
The AL-130R has a 1/4 inch x 20 threaded hole on the bottom of the preamplifier enclosure, which is used to secure the antenna to any tripod or antenna mast with a compatible mounting arrangement.
Com-Power’s AT-220 Tripod is the recommended support for this antenna. Using this tripod, the center-point of the loop can be adjusted from 0.95 meter to 1.35 meters (37” to 53”).
Calibration
The antenna is individually calibrated using NIST Traceable equipment per IEEE 291. The calibration data, along with certificate, are provided. Recognized ISO 17025 accredited calibration is also available upon request.
Application
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.
Typically, the antenna is positioned vertically with the center-point of the loop elevated one meter above the ground. The loop is then rotated about its horizontal and vertical axis to achieve the maximum reading at each frequency.