The transmit loop antenna HFRA 5170 was designed to generate well-defined magnetic fields with moderate field strength levels (<0.1 A/m) in the frequency range DC to 30 MHz. With slightly reduced performance, the loop can be used in the frequency range up to 50 MHz. The loop, consisting of one turn, is shielded against E-fields.
Design and Features:
- The nickel-plated brass housing contains a 10 Ω resistor to monitor the loop current using high impedance voltage measuring equipment (e.g., oscilloscope or voltmeter).
- The voltage drop at the 10 Ω resistor can be used to calculate the loop current, which is directly proportional to the generated magnetic field strength. A monitor output voltage of 1 V corresponds to a loop current of 100 mA.
- A further built-in resistor is used to obtain a flat frequency response over the entire frequency range.
- The TX-Loop can be connected to 50 Ω signal generators or power amplifiers directly.
- The loop can be mounted using its large female (3/8″) camera thread.
| Frequency Range: | 0 – 30 MHz |
| Impedance (nominal): | 50 Ω |
| Input Impedance: | 250 Ω |
| Number of turns: | 1 |
| Conversion Ratio Monitor Voltage / Loop Current: | 10:1 |
| Loop diameter: | 100 mm |
| Maximum Loop Current: | 135 mA |
| Maximum Voltage at Monitor Output: | 1.35 V |
| Maximum Input Voltage: | 33.75 V |
| Mechanical Dimensions: | 160 x 112 x 62 mm |
| Terminals: | BNC |
| Mount: | 3/8" |
| Weight: | 250 g |