Gaussian Monocycle Pulse Generator with Calibration Circuit for Breast Cancer Detection

Gaussian Monocycle Pulses (GMP) play a very important role in a radar-based painless breast cancer detection system. In order to guarantee the detection accuracy, it is necessary to stabilize the pulse width and the amplitude under the influence of the manufacturing variation of MOSFETs. Therefore, in this paper, the GMP generator with a calibration circuit is proposed. The calibration circuit for adjusting the delay time of each path is realized by MOS capacitor array. The proposed GMP generator has a center frequency of 5.5 GHz, −3dB bandwidth from 2.8 GHz to 9.1 GHz, and 498.6 µW power consumption.