Introduction：
The HFRA 5159 is a transmitting loop antenna manufactured by Schwarzbeck, Germany and authorized for sale by EUTTEST Shenzhen. The HFRA 5159 has 3 BNC connectors. Connector A is used to inject a 50 Ω constant voltage source into the antenna to generate a constant magnetic field strength with respect to frequency. Connector C is used to monitor the loop current by measuring the voltage drop across a 10 Ω resistor. This mode of operation linearizes the loop current by means of a series resistor, which produces a flat frequency response, but the achievable magnetic field strength is limited. The loop antenna can also be driven via connector B, which connects the loop inductor in series with a 10 Ω resistor. In this case, the loop current must be checked by measuring the voltage drop across the 10 Ω resistor. We recommend to use a high impedance voltage measurement device at connector C.
Technical parameters：
<<<<提醒：左右滑动表格>>>>| Antenna Model | HFRA 5146 |
| manufacturer | Schwarzbeck |
| agent | EUTTEST |
| Test frequency range | DC-400kHz |
| self-resonant frequency | 600kHz |
| Number of coils | 28 |
| Diameter of the ring antenna | 250mm |
| Maximum Input Current - A Connector | 70mA |
| Input Impedance-A Connector | 1.26kΩ |
| Input Limits for Port B | Contact EUTTEST for |
| Maximum input power | 5W |
| Input Connector | 3 BNC ports |
| Antenna Size | 260*306*80mm |
| weight | 450g |
| Mounting Bracket | AM9144 |
Maximum Output Field Strength Curve - Port B
