https://www.androidauthority.com/passive-wi-fi-research-676587/
US engineers unveil Passive Wi-Fi, consumes less power
Feb 25, 2016 - Researchers from the University of Washington have detailed their Passive Wi-Fi technology, which uses 10,000 less times power than conventional Wi-Fi.
passive wi fiusengineersunveilconsumes
https://www.newegg.com/wavlink-570ha1/p/1A7-0019-00045
WAVLINK AC1200 Outdoor Wi-Fi Extender Dual Band Long Range Access Point with Active/Passive PoE,...
Buy WAVLINK AC1200 Outdoor Wi-Fi Extender Dual Band Long Range Access Point with Active/Passive PoE, WAN/LAN Port, IP67 Waterproof, Supports AP/Router/Repeater...