Patent ID: 9425840
Filing Date: 2016-08-23
CPC Classification: H03H,H04B

Claim Text:
1. A radio frequency receiver comprising: a splitter for receiving an input signal comprising a preferred portion of a input frequency spectrum and an interference portion of the input frequency spectrum and splitting the input signal between a first output that provides a first spectrum that is in phase with the input signal and a second output that provides a second spectrum that is 180 degrees out of phase from the input signal; a delay line for receiving the first output from the splitter; a tunable notch filter for receiving the second output from the splitter and filtering out the preferred portion of the input frequency spectrum and outputting only the interference portion, said tunable notch filter further comprising: a summer for combining the output of the second wideband hybrid coupler and the delay line such that the interference portion of the input frequency spectrum is cancelled out in the output signal of the summer.