Description
The device enables low-loss Radio Frequency power transmission in a waveguide across a gap, where a liftable instrument is positioned. Originally designed with a wall as the instrument making the device function as a valve, to solve the problem of maintaining vacuum on one side and atmospheric pressure on the other side. When the system is in operation and the valve is open, the technology provides low-loss high power RF transmission.
In order to maintain one part of a RF system evacuated while doing installation and maintenance on the other part, dielectric windows are normally used. High power RF makes the dielectric break down and windows can therefore not be used. The RF waveguide vacuum valve was developed for CERN’s CLIC project to maintain vacuum and to reduce maintenance costs.
In order to maintain one part of a RF system evacuated while doing installation and maintenance on the other part, dielectric windows are normally used. High power RF makes the dielectric break down and windows can therefore not be used. The RF waveguide vacuum valve was developed for CERN’s CLIC project to maintain vacuum and to reduce maintenance costs.
Area of expertise
Mechanics
Applications
- Waveguide systems - Medical and Industrial field and Scientific accelerator.
- Satellite & Space Research - The technology may be used to evacuate RF satellite systems using vacuum, in space.
Innovative features
No surface electric field in the waveguide section because of TE0n mode conversion, which increases the potential of high power RF transmission because of low loss.
Specifications
A 30 GHz dual-mode vacuum valve with an overall length of 100 mm and a diameter of the central waveguide section, that contains the TE01+TE02 mode mixture, of 30 mm the transmission measurements show losses of about -0.1dB. These losses consist of two contributions: diffraction losses of -0.033dB and ohmic losses of -0.049dB.
Advantages
- The possibility to use a commercially available vacuum valve in waveguides where high-power – high-frequency is used.
- Low loss.
- There are no limitations on the frequency range of the technology. This technology can be used from the lowest frequencies under which vacuum waveguides are used up to quasi-optical transmission lines.
- The technology can be a clean environmental friendly alternative to the use of SF6, a highly potent green house gas.
Intellectual Property status
The technology has been proven by simulations of different frequencies (from 3 to 30 GHz) and a prototype for 30 GHz has been built. An international patent application is filed and the technology is ready for licensing.
没有评论:
发表评论