Design of high power oscillators and amplifiers using novel concepts of multiple-degenerate eigenwaves all synchronized with an electron beam
Abstract
A novel regime of operation for highly efficient electron-beam-driven sources and amplifiers for high-frequency microwave & mm-wave coherent electromagnetic radiation is proposed. The method is based on recent discoveries related to novel dispersion engineering via metamaterials and photonic band gap structures that have shown that multiple degenerate eigenmodes in a waveguide are able to strongly interact with an electron beam and absorb power from it. The proposed regime of operation is particularly useful to realize very high power oscillators and amplifiers that are highly efficient in terms of power consumption. The research activity will be devoted to explore practical designs of such electron-beam driven devices. Metallic waveguide structures will be designed and fabricated that are capable to guide degenerate electromagnetic waves. Experimental verifications of the existence of such degenerate regime will be conducted at millimeter waves (this has never been demonstrated yet). Demonstration of electron-beam-driven sources of radiation with high power efficiency will be conducted using state of the art simulators, and if possible via experiments with collaborators. Highly confined electron beams require expensive equipment and very large magnets. The proposed novel method will lead also to devices with a relaxed electron beam requirement that are much smaller and less expensive than current ones, still guaranteeing the quality of single frequency of radiation. The method described above based on the degeneracy of multiple electromagnetic waves in a waveguide is advantageous until the beam assumes very intense values and the advantage degrades with the intensity of the beam. In the second part of the research this limitation will be removed by exploring a novel regime based on achieving degeneracy with the presence of a very intense electron beam, leading to extremely high power beam-based oscillators and amplifiers that are at the same time very efficient.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 11, 2018
- Source ID
- FA95501810355
Entities
People
- Filippo Capolino
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of California, Irvine