crosscoupler

A cross coupler is a type of electronic device used in radio communication systems to split an input signal into two or more output signals. It is a highly selective filter that rejects the stronger of the two input signals and passes the weaker one, while also providing isolation between the two input signals.

In a typical cross coupler, one input is connected to a vector modulator that generates a sum and difference frequency. The sum and difference frequencies are then split into two separate outputs. The cross coupler uses the rejection of the sum frequency at one of the outputs, allowing the weaker (difference frequency) signal to pass.

Cross couplers have applications in various areas of radio communication, including radio broadcasting, television broadcasting, and telecommunications. They are used to provide separate output signals of modulated signals, thereby allowing two separate channels to exist on a single coaxial link.

One of the main uses of cross couplers is in satellite communications, particularly in television uplinks. They are used to split the input signal into two or more signals for transmission on two or more carriers. They also have applications in digital television and radio broadcasting, and in telecommunications networks.

Cross couplers can also be used to combine multiple input signals into a single output signal. This is done by cascading several cross couplers, one after the other, and carefully adjusting the input signals to produce the desired output.

The choice of a cross coupler as a means of signal conditioning in radio communication systems is often based on its ability to provide a cost-effective solution with low insertion loss. Also, because cross couplers utilize a vector modulator, they provide accurate frequency selection in hostile electromagnetic environments.