The AL-RS101-TX is a transmitting loop antenna constructed with 20 turns of 12 gauge enamel-insulated copper wire with a mean diameter of 12 cm. The Teflon (PTFE) structure onto which the wire is wound is elongated in order to provide the required 5 cm spacing between the loop coils and the Equipment Under Test (EUT) when the antenna is placed flush against the EUT surface as shown to the left. The antenna input terminals are fitted with 4 mm banana jacks.

The AL-RS101-TX also incorporates a mechanism for mounting the ALRS101-RX antenna into the exact required position for calibration of test levels, with the required 5 cm spacing between the loops. The antenna is capable of handling RF currents as high as 15 amperes; corresponding to a maximum magnetic flux density of 1.42x109 pico Tesla or 183.1 dBpT; [9.49x107 pT/ Ampere] at a distance of 5 cm.

The AL-RS101-RX is a receiving loop antenna used during RS101 test level calibration to measure the magnetic field intensity generated by the AL-RS101-TX transmit loop. Its construction consists of a 51-turn, electrostatically shielded coil of 7-strand, 41 gauge Litz wire. The antenna output port is fitted with a female BNC connector.

Application

The RS101 Loop Antenna Set is specifically designed for tests according to MIL-STD-461, RS101, radiated susceptibility, magnetic field. During this test, the Equipment Under Test (EUT) is exposed to magnetic fields of a specified magnitude to ensure that it does not exhibit any malfunction, degradation of performance, or deviation from specified indications.

Prior to the test, the field generated is calibrated by measuring the field with the AL-RS101-RX antenna, which is aligned coaxially with the AL-RS101-TX transmit loop with a separation distance of 5 cm. The RF current delivered to the transmit loop is monitored and then recorded when the required field is achieved at each test frequency.

When the test is performed, the amplitude of the test generator is increased until the current value measured with the current probe is equal to the value recorded during calibration, at each respective test frequency.