Broadband Artificial Network (BAN) is used in the automotive industry to directly inject radio frequency power into signal or power lines. This method is called "direct power injection."

  The BAN provides good isolation between the AE port and the EUT port. Therefore, the injected RF signal mainly points to the EUT port. From the EUT port, the BAN provides a standard minimum impedance, and the RF signal from the amplifier is loaded by this impedance. Higher current BANs require larger ferrites, which have lower impedance and poorer decoupling. Therefore, BAN8508 can only be used in the range of 2A-8A. For higher or lower currents, a suitable BAN should be used.

  The basic circuit is an L/C low-pass filter with a wideband monolithic ceramic capacitor on the AE end, and the inductance is formed by five toroidal coils in series.

  The choice of BAN depends on the maximum current and signal transmission rate. BAN8508 specifies the current between 2A-8A.

  The test arrangement and measurement methods refer to manufacturer standards such as ISO 11452-7 or DaimlerChrysler DC-10614 (2005-03).

  BAN must be connected in series with the device under test (DUT), so a 4mm socket is used. For higher currents, a hook-type cable lug is used because its contact resistance is low and the heat dissipation is small. The red AE connector in ISO 11452-7 is called "terminal 2" and is connected to the power supply of our auxiliary equipment.

  The black terminal on the AE side is connected to the reference ground. It can be used to measure the electrical characteristics of the BAN or as an additional ground connection. The ground connection of the BAN has been provided by the metal plate of the BAN8508 base.

  The BNC connector can be used to inject radio frequency signals from the generator/amplifier into the DUT. In the above standards, the BNC connector is also called "terminal 3".

  According to the standard, a DC blocking capacitor must be used. It must be connected to the BNC jack and provide isolation between the DC on-board voltage and the RF injection device, so as to avoid the possibility of damaging the connected measuring equipment through the on-board voltage DC. Choose a suitable DC blocking capacitor, it is "DC Block 500".

  For the range of 8A to 30A, BAN8530 is recommended. BANs with other currents or transmission rates can be provided on request.

  The solder joint of the EUT power cord is defined as the reference surface for measuring the impedance of BAN8508.

  Safety advice:

  BAN 8508 has an open frame design, so it has no protection against accidental contact. Depending on the working voltage, dangerous voltages may appear. Therefore, conductive objects must not be placed on or near the ban. Any user must understand the possible dangers. The equipment must be set up in a closed environment to prevent accidental contact with wires.

  If the BAN runs for a long time under high current, the coil will heat up, and only technicians can use the BAN. In addition, the safety standards of the country using the BAN must be observed.