ELECTRONICALLY TUNABLE FILTER

摘要

An electronically tunable filter (ETF) and systems comprising an ETF are disclosed herein. The ETF comprises: a first image rejection mixer; a second image rejection mixer; a first hybrid coupler, the first hybrid coupler being coupled to the first image rejection mixer; a second hybrid coupler, the second hybrid coupler being coupled to the second image rejection mixer; an internal filter coupled to the first hybrid coupler and the second hybrid coupler; a control port for receiving a control signal; a power splitter coupled to the control port, the first image rejection mixer, and the second image rejection mixer; a first port coupled to the first image rejection mixer; and a second port coupled to the first image rejection mixer.