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RF power divider/combiner

A large class of microwave components can be formed by combining two phase shifters and two fixed power dividers (combiners). A power divider and a power combiner may be made to operate over broad frequency bands at relatively high RF power levels. In the field of RF transmission, power requirements may exceed practical levels for a single amplifier, making it desirable to amplify a signal with multiple RF power amplifiers in parallel. An input power divider circuit is used to divide the signal and provide it to the inputs of the multiple amplifiers, while an output combiner provides the combined outputs of the multiple amplifiers to the next stage load. Many applications involve circuits requiring two input power signals to be combined into one output signal to be operated on by following circuits. Radio frequency power combiners are used for combining a number of RF inputs into a single output in a transmission system. The combiner also prevent a high current flow in a short circuited failed radio frequency power source, this current being derived from the remaining operative radio frequency power sources. Power combining techniques for radio frequency signals, including millimeter wavelength signals, have been accomplished in either a waveguide circuit or in a microstrip circuit.

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