Using a Doppler radar sensor with the Raspberry Pi By Les Pounder / Tutorial / 31st October 2017 But the RCWL-0516 is something new and exciting in that it offers the simplicity of a PIR sensor but with a greater range and ability to detect through objects, yet it still only retails for a few dollars from China. For a sawtooth pulse, the Raspberry Pi must only increment these outputs binary.
A triangle pulse is also possible without problems. This one uses "can-tennas".

At 250 MHz bandwidth, these steps are either 1 MHz or 62 kHz in size.

S.A.R., Synthetic Aperture Radar The SAR is a commonly-used type of radar used by planes and satellites to map terrain and textures.

By using his intellect and skillfully mining ham radio swap meets, he was able to build a working synthetic aperture radar (SAR) capable of capturing high resolution scans of tiny things. For instance, the above message was actually written in push pins, hidden behind a foam plate. The available frequency range is swept by either 256 or 4096 substeps.

If the sawtooth pulse … Whether 8 bits or 12 bits are used has an influence on whether the sawtooth pulse is rather a stepping voltage, or not.