Cyclotron resonance maser system with microwave output window and coupling apparatus
US4604551A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1984 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | Jun 20, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S1/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A cyclotron resonance maser system includes coaxial coupling between coaxial wave guides. Such coupling is provided between an outer coaxial waveguide through which a gyrotron electron beam passes in generating or amplifying microwaves and an inner coaxial waveguide terminating in an annular window. The coupling separates the microwaves from the electron beam before the collector region of the gyrotron so that the collector dimensions are not related to, and hence restricted by, the wavelength of the output microwaves. The particular preferred coupling includes substantially axial slots in the common wall between the respective waveguides which slots provide selective coupling between the waveguides in the desired modes and limiting mode conversion. The coupling is preferably between a TE.sub.On or TE.sub.ml mode in the outer input waveguide and a TE.sub.On' mode in the inner, output waveguide, n and n' being integers greater than 1. A preferred resonant cavity limits the generated microwaves to a TE.sub.ml mode. Partial reflection and feedback from the inner waveguide stabilizes the input mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.