ATF

Class 9

Radio frequency (RF) circuitry to protect RF receivers from certain electromagnetic signals including electromagnetic interference (EMI); RF circuitry to automatically limit RF signals exceeding a threshold level including a power threshold level by attenuating RF signals while concurrently allowing RF signals operating below the threshold level to pass through; active and passive RF devices in the nature of radio frequency (RF) limiters, radio frequency (RF) circulators, radio frequency (RF) isolators, radio frequency (RF) amplifiers, radio frequency (RF) mixers, data converters, transistors, capacitors, electric resistors, electronic inductors, antennae, transformers, and diodes which automatically adapt their electrical characteristics to mitigate RF signals above a preset power level without attenuating RF signals below the preset power level; radio frequency (RF) circuitry to protect RF receivers from certain electromagnetic signals without requiring a priori knowledge of the interferer characteristics or use