Directional Coupler DIN-Female The Directional Coupler Din-female is a four-port component with directional transmission. It consists of two pairs of transmission systems connected by coupling devices. This section describes the Directional Coupler DIN-Female performance indicators. Then introduce the waveguide double-hole Directional Coupler DIN-Female, double-branch Directional Coupler DIN-Female and parallel coupled microstrip Directional Coupler DIN-Female.
The Directional Coupler DIN-Female is a four-port network where port ① is the input, port ② is the direct output, port ③ is the coupled output, and port ④ is the isolated. The scattering matrix is set to [S]. Describes the Directional Coupler DIN-Female performance indicators: coupling, isolation, orientation, input standing wave ratio, and working bandwidth. The following are introduced respectively.
In multi-carrier-frequency synthesis systems, the 3dBDirectional Coupler DIN-Female (commonly known as the 3dB bridge) is usually used, as shown below. Such circuits are common in indoor distributed systems. After the signals f1 and f2 from the two power amplifiers pass through the 3dBDirectional Coupler DIN-Female, the output of each channel contains two frequency components f1 and f2, each frequency component is reduced by 3dB. If one of the outputs is connected to an absorbing load, the other output can be used as a power source for a passive intermodulation measurement system. If you need to further improve isolation, you can add elements such as filters and isolators. A well-designed 3dB bridge can have isolation in excess of 33dB.
In radio frequency test and measurement systems, you can often see the circuit shown below. If the DUT is a receiver, the Directional Coupler DIN-Female coupling can inject a neighboring interference signal into the receiver, Then the anti-interference performance of the receiver is tested by the directional-coupler DIN-Female directional-terminal comprehensive tester. If the DUT is a cellular phone, you can turn on the phone's transmitter by connecting the multimeter to the Directional Coupler DIN-Female coupling, and then use the spectrum analyzer to measure the phone's stray output. Of course, a few filter circuits are added before the spectrum analyzer. Since this example only discusses the Directional Coupler DIN-Female application, the filter circuits are omitted.
Directional Coupler DIN-Female https://www.cenrf.com/Directional-Coupler-698-3800MHz-DIN-Female.html
