Schwarzbeck HFRA 5156 Circular Transmitting Loop Antenna

The transmit loop antenna HFRA 5156 was designed to generate well defined magnetic fields with moderate fieldstrength levels (< 0.1 A/m) in the frequency range DC to 5 MHz. With slightly reduced performance the loop can be used in the frequency range up to 10 MHz. The loop, consisting of ten turns in series with a 480 Ω resistor, is shielded against E-fields. The loop can be mounted at its female large camera thread. The generated magnetic field is proportional to the loop current. A tabular indicates the fieldstrength values in A/m and dBμA/m to be expected with the maximum permissible current of 100 mA. Additionally the relative decrease of magnetic fieldstrength referred to the center of the loop antenna can be found. Lower magnetic fieldstrengths can be achieved by scaling the current to the respective value. With a feed current of 10 mA instead of 100 mA the tabular values decrease by a factor of 10, which corresponds to a reduction by 20 dB in logarithmic measure. All specified magnetic fieldstrengths refer to the component which is perpendicular to the loop-plane.