Apparatus for generating electromagnetic waves
An apparatus for generating electromagnetic waves is envisaged relating to the field of electromagnetic wave generating systems. The apparatus provides efficient radio frequency amplification, facilitates low loss electromagnetic generation, enables efficient utilization of kinetic energy of electrons, and works for different radio frequencies. The apparatus comprises an evacuated envelope, a pair of metal plates, a resonator, an electron gun, a magnetic field generator, and a pick-up loop. The evacuated envelope defines a space therewithin. The pair of metal plates defines a passage therebetween. The resonator is coupled to the pair of metal plates. The electron gun emits controlled bursts of electrons into the passage. The magnetic field generator is configured to generate electromagnetic waves. The pick-up loop extracts the generated electromagnetic waves.
1. An apparatus for generating electromagnetic waves, said apparatus comprising:
an evacuated envelope defining a space therewithin;
a pair of metal plates disposed in a spaced apart configuration within said space thereby defining a passage therebetween;
a resonator coupled to said pair of metal plates;
an electron gun configured to emit bursts of electrons into said passage in a controlled manner;
a magnetic field generator configured to generate a time varying magnetic field, oriented in a direction transverse to the X-Y plane containing said apparatus across the passage, thereby imparting oscillations to the electrons for inducing an oscillating electric field between said pair of metal plates, said oscillating electric field configured to induce a time varying current in said resonator resulting in the generation of electromagnetic waves; and
a pick-up loop coupled to said resonator and configured to extract said generated electromagnetic waves,
wherein said bursts of electrons travel along an undulating path under the influence of said time varying magnetic field, and
wherein said bursts of electrons travel one cycle of oscillation in a fixed time period.
2. The apparatus as claimed in claim 1 , wherein said evacuated envelope is coupled between said electron gun and a collector electrode.
3. The apparatus as claimed in claim 1 , wherein said electron gun is selected from the group consisting of a thermionic electron gun, an electrostatic electron gun, and a laser driven electron gun.
4. The apparatus as claimed in claim 1 , wherein the width of the resonator is smaller than the width of the evacuated envelope.
5. The apparatus as claimed in claim 1 , wherein side walls of said evacuated envelope are tapered.
6. The apparatus as claimed in claim 1 , which includes a D-shaped envelope coupled between said electron gun and at least one evacuated envelope.
7. The apparatus as claimed in claim 6 , wherein the electron gun is configured to emit high velocity stream of electrons.
8. The apparatus as claimed in claim 7 , wherein the angular displacement between successive electron travel paths changes linearly with time.