A wirelessly powered injection locked oscillator with on chip antennas in 180nm SOI CMOS
This paper presents a battery less mm sized wirelessly powered injection locked oscillator with on chip antennas in 180nm SOI CMOS. The chip harvests electromagnetic radiation from a continuous wave source in the X band using an on chip antenna. In addition, the chip is equipped with a broadband injection locking oscillator that locks to the frequency of the input and produces a synchronized signal at the half frequency of the input. The new signal is then radiated back using an on chip dipole antenna. This architecture resolves the conventional self interference issue in RFID sensors by separating the received and transmitted frequencies. In addition, the locking mechanism improves the phase noise of the on chip oscillator to 93dBc/Hz at 100Hz offset.
2016 IEEE MTT S International Microwave Symposium (IMS)