- #1
awygle
- 13
- 0
So I've been reading up on optical rectennas, and the sources I read say that the reason such devices are not yet efficient enough to be practical isn't the antenna, it's the rectifier, since solid-state Schottky diodes of the types normally used don't work in the THz range of AC frequencies generated by the antennas without large power losses. Apparently MIM diodes have been shown to work up to about 150THz, but the ideal wavelengths of light for solar power would produce 190 - 750 THz.
My question, then, is in the topic title - do Fleming valves (vacuum-tube diodes) fail at high frequencies as well? Also, what precisely causes the power loss in solid-state diodes to happen in the first place?
My question, then, is in the topic title - do Fleming valves (vacuum-tube diodes) fail at high frequencies as well? Also, what precisely causes the power loss in solid-state diodes to happen in the first place?