Patent ID: 9288557
Filing Date: 2016-03-15
CPC Classification: H01Q,H04B,H04Q

Claim Text:
1. An apparatus for generating a frequency spectrum of an RF signal comprising: a gate switch for generating an output signal pulse within a predetermined time window from a laser of wavelength lambda modulated by an input RF signal; a first fiber optical loop for circulating a first percentage of a first pulse of the output signal pulse from the gate switch, for a predetermined number of cycles n where each cycle takes time t a second fiber optical loop for conducting a second percentage of the first pulse for predetermined number of cycles “k”, where each cycle takes time t a low-loss switch with a first state for coupling the first pulse from the gate switch to a coupler that splits the output signal pulse into the first percentage output and the second percentage output, the coupler coupling the first pulse into the first fiber optical loop and tapping replicas of the pulse from the first fiber optical loop, and a second state for coupling the second percentage of the first pulse to recycle back via the second loop to the first loop by the coupler to increase the intensity of the tapped replica pulses; and a processor for correlating the replicas of the pulse with each other to produce a set of data points comprising a plurality of multiplexed correlated pulses and transforming the data points into a channelized frequency spectrum of the input RF signal.