Com-Power AL-130 Active Loop Antenna 9 kHz – 30 MHz
Description
The AL-130 is a broadband active receiving loop an¬tenna for electromagnetic field measurements from 9 kHz – 30 MHz This antenna uses a 19 inch shielded loop for magnetic field (H-Field) measurements.
The AL-130 has built in active electronics that pro¬vide impedance matching, linear antenna factors and higher antenna sensitivity, the output impedance is matched to 50 Ohms, so that it can be directly connected to any spectrum analyzer without an additional matching network.
The front panel has indicators for antenna saturation and battery status. The internal NimH batteries take about two hours to fully charge and can operate the antenna for 8 hours continuously. A charger is included with each antenna.
Features
- Wide Frequency Range – 9 kHz to 30 MHz
- Battery Powered
- Built in Preamplifier
- Saturation Indicator
Com-Power AL-130 Application
The loop antenna is utilized for testing to meet the various EMC requirements specified by FCC, CISPR, MIL-STD and EN. This antenna is specified for open field emissions testing below 30 MHz It is assumed that in the far field the ratio of E and H field will remain the same as the characteristic impedance of the medium.
The loop antenna is positioned with its plane vertical at the specified distance from the EUT. In addition to the EUT rotation, the loop antenna also has to be rotated about its vertical and horizontal axis to maximize emissions. This procedure is described in detail in ANSI C63.4.
Monopole antennas (such as the AM-741) also operate in the same frequency range as a loop antenna, but are used for E-field measurements and require a counter poise.
Specifications
|
Frequency range |
9 kHz – 30 MHz |
|
Dynamic range |
110 dB at 1 MHz |
|
Sensitivity |
10 dBμV/m at 1 MHz |
|
1 dB compression point |
3 V/m |
|
Output Impedance |
50 Ohm |
|
Connector type |
BNC |
|
Power |
6V, NimH battery pack |
|
Charger output |
6 VDC, 500 mA |
|
Weight |
6 lbs / 2.7 kgs |
|
Loop diameter |
19 inches / 49 cm |
|
Amplifier section |
10.25 x7.25 x 2.5 inches. / 26 x 18.4 x 6.4 cm |
