Directional Coupler N-Female is a measuring device that can be connected to transmission lines between an RF source and a load, such as signal generators, vector network analyzers, and transmitters, to measure RF power (forward component) from an RF source to a load. , and the power is reflected from the load back to the RF source (reflection assembly). If the forward and reflected components are measured, the total power, return loss of the load, and standing wave ratio can be calculated.

Typically, the power is connected to the input port of the coupler, while the load is connected to the output or transmission port. The output of the coupling port is a decayed forward signal. The attenuation value is shown in the diagram of the three-port device. In a three-port device, the isolation port is terminated internally. In a four-port device, the port output is proportional to the reflected signal. Arrows in the schematic indicate component paths. For example, in a four-port configuration, the input port points to the coupling port, indicating that it receives the forward component, while the output port connects to the isolation port, which is used to read the reflected signal. Port numbers are not standard and vary from manufacturer to manufacturer. However, port naming is relatively uniform for each vendor.

Couplers are symmetrical devices and the connections at each port are interchangeable. For a three-port device, reversing the input and output ports makes port 3 an isolated port. In a four-port device, reversing the input and output ports interchanges the coupling and isolation ports. The output of the coupler is an RF signal. The outputs of the coupled and isolated ports are usually connected to a peak or RMS detector that produces baseband signals associated with forward and reflected power levels. The combination of Directional Coupler N-Female and related detectors constitutes a reflectometer.

In some cases, a back-to-back connection of two Directional Coupler N-Female can form a two-way Directional Coupler N-Female to minimize leakage between the coupled and isolated ports.

Directional Coupler N-Female https://www.cenrf.com/Directional-Coupler-380-2700MHz-N-Female-update.html