RF amplifiers are devices that accept a varying input signal and produce an output signal that varies in the same way, but with larger amplitude

RF phase shifters are twin-ported devices that alter the phase of an output signal in response to an external signal

RF filters and microwave filters are devices that pass or reject signals by frequency.

RF power dividers and power combiners are circuits that accept an input signal and deliver multiple outputs equal in phase and amplitude.

RF isolators and RF circulators are passive devices used to control the propagation of an RF signal

RF waveguide combiners and dividers are circuits that combine or divide radio frequency (RF) signals

RF couplers are circuits that sample RF transmissions by combining (coupling) signals asymmetrically.