Electron accelerator for ultra-small resonant structures
View Patent ↗An electronic transmitter or receiver employing electromagnetic radiation as a coded signal carrier is described. In the transmitter, the electromagnetic radiation is emitted from ultra-small resonant structures when an electron beam passes proximate the structures. In the receiver, the electron beam passes near ultra-small resonant structures and is altered in path or velocity by the effect of the electromagnetic radiation on structures. The electron beam is accelerated to an appropriate current density without the use of a high power supply. Instead, a sequence of low power levels is supplied to a sequence of anodes in the electron beam path. The electron beam is thereby accelerated to a desired current density appropriate for the transmitter or receiver application without the need for a high-level power source.
1. A transmitter, comprising:
a cathode emitting electrons;
two or more anodes arranged sequentially downstream of the electrons emitted by the cathode;
a power source operationally associated with a power switch to provide power to selected ones of the two or more anodes based on positions of the electrons relative to the selected anodes;
at least one ultra-small resonant structure downstream of the two or more anodes and located proximate the electron beam whereby the resonant structures emit electromagnetic radiation at least in part due to the passing proximate electron beam.
2. A transmitter according to claim 1 , wherein:
the two or more anodes are physically spaced at generally evenly spaced.
3. A transmitter according to claim 2 , wherein:
power switch switches power to anodes farther downstream of the cathode for shorter durations than for anodes nearer the cathode.
4. A transmitter according to claim 1 , further including:
a controller to provide the power switch with a timing to turn power ON respectively to the two or more anodes.
5. A transmitter according to claim 4 , wherein the controller instructs the power switch to turn a respective one of the two or more anodes OFF when it senses a position of the electron beam relative to the one anode being turned OFF.
6. A transmitter according to claim 5 , wherein: generally when the controller instructs the power switch to turn said one of the two or more anodes OFF, the controller also instructs the power switch to turn a next one of the two or more anodes ON.
7. A transmitter according to claim 4 , wherein the controller instructs the power switch to sequentially turn the respective anodes ON when the electron beam generally approaches the respective anodes.
8. A transmitter according to claim 4 wherein the controller provides the timing based on current flows detected in the anodes by the controller caused at least in part by the moving electron beam.
9. A transmitter according to claim 8 , wherein the controller senses current in each anode and instructs the power switch to sequentially turn the anodes ON when the controller senses that the passing electron beam has induced a threshold current in one or more of the anodes physically associated with the respective anodes being turned ON.
10. A receiver to decode a signal from electromagnetic radiation, comprising:
a cathode emitting electrons;
two or more anodes arranged sequentially downstream of the electrons emitted by the cathode;
a power source operationally associated with a power switch to provide power to selected ones of the two or more anodes based on positions of the electrons relative to the selected anodes;
at least one ultra-small resonant structure downstream of the two or more anodes and located proximate the electron beam whereby the resonant structures couple the electromagnetic radiation and affect either the direction or speed of the electron beam based on a content of the signal.
11. A receiver according to claim 10 , wherein:
the two or more anodes are physically spaced at generally evenly spaced.
12. A receiver according to claim 11 , wherein:
power switch switches power to anodes farther downstream of the cathode for shorter durations than for anodes nearer the cathode.
13. A receiver according to claim 10 , further including:
a controller to provide the power switch with a timing to turn power ON respectively to the two or more anodes.
14. A receiver according to claim 13 , wherein the controller instructs the power switch to turn a respective one of the two or more anodes OFF when it senses a position of the electron beam relative to the one anode being turned OFF.
15. A receiver according to claim 14 , wherein: generally when the controller instructs the power switch to turn said one of the two or more anodes OFF, the controller also instructs the power switch to turn a next one of the two or more anodes ON.
16. A receiver according to claim 13 , wherein the controller instructs the power switch to sequentially turn the respective anodes ON when the electron beam generally approaches the respective anodes.
17. A receiver according to claim 13 wherein the controller provides the timing based on current flows detected in the anodes by the controller caused at least in part by the moving electron beam.
18. A receiver according to claim 17 , wherein the controller senses current in each anode and instructs the power switch to sequentially turn the anodes ON when the controller senses that the passing electron beam has induced a threshold current in one or more of the anodes physically associated with the respective anodes being turned ON.
19. A method, comprising the steps of:
providing a cathode to emit a pulse of electrons;
directing the electrons past a sequence of anodes;
powering the anodes in sequence as the pulse of electrons approaches the powered anodes;
providing at least one ultra-small resonant structure;
passing the pulse of electrons proximate the ultra-small resonant structure to couple energy between the pulse of electrons and the ultra-small resonant structure.
20. A method according to claim 19 , wherein the energy is coupled from the pulse of electrons to the ultra-small resonant structure.
21. A method according to claim 20 , wherein the energy is couple from the ultra-small resonant structure to the pulse of electrons.