An FM Chirp Waveform Generator and Detector for Radar
Sawtooth Generator and FM Detector
Youri Blom (TU Delft - Electrical Engineering, Mathematics and Computer Science)
F. Bradarić (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Morteza Alavi – Mentor (TU Delft - Electronics)
M. Babaie – Graduation committee member (TU Delft - Electronics)
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Abstract
The "FM Chirp Waveform Generator and Detector for Radar" is a Bachelor graduation project with an educational purpose. In this thesis, two modules of the whole system are designed and simulated. In particular, the sawtooth generator and the FM detector. The sawtooth generator is used to generate a linearly increasing signal, which can be used to make a chirp signal. The FM detector is used to extract the original information signal from the received FM signal. The used procedure consisted of determining possible implementations, setting up the design equations, choosing component values and simulating the circuits in ADS. The sawtooth generator was implemented using a ramp generator, Schmitt trigger and a voltage clamper while the FM detector was implemented using a balanced slope detector and a differential-to-single-ended converter. The results showed that the sawtooth generator can successfully produce a sawtooth waveform and that the FM detector can successfully retrieve it. It was concluded that both the modules satisfy all the requirements, meaning that they should work as expected in the whole system. Finally, the future steps were listed which, among others, include improving the linearity of the sawtooth generator and the FM detector.