2020-09-152020-09-152020-05-26Babakhani, Aydin and Yang, Xuebei, "Electron paramagnetic resonance (EPR) systems with active cancellation." Patent US10663541B2. issued 2020-05-26. Retrieved from <a href="https://hdl.handle.net/1911/109348">https://hdl.handle.net/1911/109348</a>.https://hdl.handle.net/1911/109348An active cancellation system may be utilized to cancel interference, such as from transmitter leakage or self-interference in a transceiver of an electron paramagnetic resonance (EPR) spectrometer. The active cancellation system may be inserted between the transmitter and receiver. The active cancellation system may receive the output of the transmitter, and generate a cancellation signal with the same amplitude, but phase shifted relative to the self-interference signal. The cancellation system may include an attenuator/amplitude tuner, buffer, VQ generator, and phase shifter.26engUtility patentUS10663541B2