For those of you who are into electronics you probably know everything there already is to know about couplers and how they work. But for those who are newbies to the scene, there is still a lot learn. Here are facts about couplers and their many varieties.
A standard directional coupler is nothing more than a network consisting of 4 ports. The input port is port 1, the output port is port 2, the coupled port is port 3, and the terminated port is port 4. The power will go from 1 to 2 where it is coupled with transmission power and sent to 3 and then is subsequently terminated at 4.
A dual directional coupler works essentially the same way but instead of just one directional coupler, there are two basically back to back. Both isolated ports will terminate in the frequency of 50 ohms. The ports numbered 3 and 4 can be placed anywhere there is an unbalanced load. This form of a coupler is most used when it comes to monitoring forward and reverse power for each type of system.
The next type of coupler is known as a bidirectional coupler. This type of coupler functions by making the input and output ports completely interchangeable. This type of coupler is most commonly used to redirect or reduce directivity. They are widely loved simply because of the uniqueness in which they function and the reliability which they are known for.
As you can see, there are many wonderful reasons to use any type of these couplers. They can provide the necessary electronic aid that the device or machine will need and can certainly streamline functionality in regards to how the co-efficient factors of the device maintain their power from a directional standpoint. Couplers are certainly the saviors of
