Radar

=== spotterrf.com ===
https://spotterrf.com/ holds patents on long range radar foliage penetration, South African farmers should pinch of millions of ZAR to hack these patents or outright purchase. Blanketing whole swaths of grazing lands, dams and roads is the most practical solution in a farm setting. Range is 1.4km person detection. 
=== Doppler ===
2-16M Doppler Radar Human Body Induction Switch Module HB100 X 10.525GHz Microwave Sensor For Ardunio HB100X at aliexpress
http://www.ebay.com/itm/HB100-Microwave-Sensor-Module-10-525GHz-Doppler-Radar-Motion-Detector-Arduino-/171297069092
https://www.youtube.com/watch?v=2RXSVBzEs14 RCWL-0516 RCWL 0516 Microwave Radar Sensor, human. On aliexpress for $1. Range about 5m(reduce range Eliteworm#radar), which compares well with pet safe passives. Avoid radar signature interference when installing multiple units. See OutdoorBox#Place_Mini-itx_inside_metal_box
Radar Sensor Module Wireless HB100 Microwave Doppler Radar Detector Probe Wireless Sensor Module 10.525GHz from Aliexpress.com shop ModuleFans $2.65. attach to satellite dish 10m range
https://www.youtube.com/watch?v=9WiJJgIi3W0 radar burglar detection review of five different modules.
https://github.com/jdesbonnet/RCWL-0516 Information about RCWL-0516 microwave proximity switch module (ICStation.com SKU 10630
=== SoC ===
https://www.uhnder.com/ , https://www.edn.com/5G/4461894/A-digital-mmW-radar-IC-for-automotive-use single chip radar , 300m range and discerns between living and inanimate. 
It tracks objects down to the cm, identifying loitering near a perimeter wall, securing farms etc. The company known as Uhnder is emerging from ‘stealth mode’ with their first chip and a paper they published at the ISSCC 2019, A 192-Virtual-Receiver 77/79GHz GMSK Code-Domain MIMO Radar System-on-Chip. Company co-founder Manju Hegde told me that they are planning a launch later in 2019
=== self driving cars ===
77ghz radar modules used in self driving cars are mass produced , reducing costs. Range is 150m
=== journals ===
https://www.hindawi.com/journals/ijmst/2014/958905/ A multifrequency radar system for detecting humans and classifying their activities at short and long ranges is described. The short-range radar system operates within the S-Band frequency range for through-wall applications at distances of up to 3 m. It utilizes two separate waveforms which are selected via switching: a wide-band noise waveform or a continuous single tone. The long-range radar system operating in the W-Band millimeter-wave frequency range performs at distances of up to about 100 m in free space and up to about 30 m through light foliage. It employs a composite multimodal signal consisting of two waveforms, a wide-band noise waveform and an embedded single tone, which are summed and transmitted simultaneously.
=== marine radar ===
https://www.sea-hawk.com/Small-target-detection/default.aspx If you are looking for superior small target detection for your vessel or for your offshore location, a polarimetric radar antenna should be your best choice. The Sea-Hawk radar is your future small target detection system. Sea-Hawk polarimetric radars are multi polarized, resulting in far more detailed detection ability than traditional radar systems. Sea-Hawk can detect very small, and even fast moving, objects and would therefore raise your small target detection capabilities to a level you could only dream about until recently.
=== RCWL-0516 RCWL ===
https://www.youtube.com/watch?v=rgVu9n_j9pM 10 ZAR for one 3.2ghz radar sensor(no heat) . pInout diagram given.
https://www.youtube.com/watch?v=R61u6WqtCzU Got these neat RCWL-0516 microwave proximity sensors in a recent mailbag and decided to see if I could mock up a little circuit to see if I can get it to work for me. If I can do it, so can you!
https://www.electroschematics.com/get-started-microwave-radar-motion-sensor/
=== Surveillance radar ===
https://securityradar.co.za/radar/
* https://en.wikipedia.org/wiki/Compact_surveillance_radar hack these Patents held by five companies. 
* https://spotterrf.com/ https://www.google.com/patents/US20150204969 A method for determining location information for a target may include generating a cyclic transmit signal having a fixed frequency slope over a substantial portion of each cycle and an operational frequency that is selected to penetrate foliage, transmitting the cyclic transmit signal without up-conversion with at least one transmit antenna, down-converting two or more return signals received from corresponding return antennas with the cyclic transmit signal to provide a corresponding set of baseband signals, extracting magnitude and phase information for each return signal as a function of range from the plurality of baseband signals, and determining a location of a target from the magnitude and phase information. A corresponding apparatus, system, and computer readable medium are also disclosed herein.
* http://www.magosys.com/
* http://www.geolux.co.za/Products/
=== links ===
https://www.hackster.io/news/infineon-s-cy8ckit-062s2-ai-dev-kit-targets-low-power-ml-and-ai-at-the-edge-8b9255b1e05f?mc_cid=055faea68c This is connected to a surprisingly comprehensive set of on-board sensors, given the board's compact dimensions: there's a six-axis inertial measurement unit (IMU) and dedicated three-axis magnetometer, a pressure sensor, a pair of digital MEMS microphones, and — most surprising of all — a radar sensor, the Infineon XENSIV 60GHz BGT60TR13C. This, the company explains, includes a finite state machine (FSM) to reduce power draw and processing load on the host microcontroller, while offering human presence detection out to nearly 50 feet with sub-millimeter movement sensing. 
https://www.youtube.com/watch?v=s-GzUTyIH9c Lately, many radar sensors have become available for relatively cheap prices. In this video, I will give you an overview of what is available and how they compare. And, of course, we will have a look into how they work and test a few of them. After viewing this video, you should be able to choose the right sensor for your needs. And you should know which are overpriced.
HLK-LD2410B 24ghz human presence detector, 
HB100 Human Presence Radar Sensor 10GHz, Range up to 20m 
Category:radar
Category:Burglar alarm