Today's Tech News: Notable or Not?

https://phys.org/news/2026-03-hall-rectenna-ghz-frequency-range.html "converting RF into DC electricity relies on diodes which do not efficiently capture high-frequency signals, overcome by instead relying on Hall effect/ high-mobility semiconductor heterostructures bypassing resistor-capacitor time constant to operate into tens of GHz... generates power entirely from even very weak ambient RF without need for batteries... small sensors for smart homes, industrial monitoring, wearables, deep space/ remote sensing, self-powered IoT/ internet of everything"

https://www.graphene-info.com/metal-insulator-graphene-diodes-enable-terahertz-rectennas-flexible-substrates Antenna converts incoming photons into moving electrons. Rectenna is an antenna directly coupled to a diode. Diode only allows the electrons to move in one direction--> DC current. New device converts terahertz and optical photons to DC current. "compatible with conventional thin-film technology – and with high-throughput... possibility of using rectennas arrays as power supplies for wearable devices or self-powering sensors" Related: Solar Rectennas: Analysis and Design (2019) https://www.intechopen.com/chapters/69146  "Pro: harvests photons from the whole solar spectrum, material widely available as thin films, inexpensive compared to conventional solar cells... Con: time constant must be ~0.1 fs (difficult), leakage current of the diode < 1 μA (difficult), strong matching between the impedance of the antenna and the diodes is needed for max power (so pape...