https://www.hscott.net/a-60-ghz-phased-array-for-10/
http://mrvacuumtube.blogspot.com/2012/01/diy-phased-array-radar-using-pegboard.html
https://ocw.mit.edu/courses/res-ll-003-build-a-small-radar-system-capable-of-sensing-range-doppler-and-synthetic-aperture-radar-imaging-january-iap-2011/
https://www.mwrf.com/technologies/components/semiconductors/article/21149687/analog-devices-flatpanel-phasedarray-antenna-design
https://www.microwavejournal.com/articles/3144-a-practical-guide-to-the-designof-microstrip-antenna-arrays
423038.pdf