... è sempre possibile imparare a costruirne uno da soli ... il MIT ha un corso apposta "BUILD A SMALL RADAR SYSTEM", costa $3,750 e il prezzo ... dovrebbe far capire che ... NON è cosa per dilettanti ... 
Ulteriori informazioni sul corso QUI ...
"Are you interested in learning about radar by building and testing your own imaging radar system?
MIT Professional Education is offering a course in the design, fabrication, and testing of a laptop-based radar sensor capable of measuring Doppler and range and forming synthetic aperture radar (SAR) imagery. Lectures will be presented on the topics of applied electromagnetics, antennas, RF design, analog circuits, and digital signal processing while simultaneously building your own radar system and performing field experiments. Each student will receive a radar kit designed by MIT Lincoln Laboratory staff and a course pack.
This course will appeal to those who want to learn how to develop radar systems or SAR imaging, use radar technology, or make components or sub-systems.
During the course you will bring your radar kit into the field and perform experiments such as measuring the speed of passing cars or plotting the range of moving targets. A SAR imaging competition will test your ability to form a SAR image of a target scene of your choice from around campus."
Guglielmo