The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A four channels Ka-band multi-in-multi-out (MIMO) integrated TWT was designed based on previous three channels Ku-band integrated TWT. This device integrates four helices in one periodical permanent magnet (PPM) system. Over 50W output power could be achieved for each channel with overall efficiency higher than 40%.
The radial divergent sheet beam electron optical system focused by a radial uniform magnetic field is designed in this paper. It is shown that the radial divergent sheet beam with size of 8 deg×0.23 mm, generated by the electron gun with 1700V, 151 mA, can stably pass through the beam drift tunnel with transverse size of 20 deg×0.52 mm and the length of 20 mm in a radial quasi-uniform magnetic field.
Integrated TWT based on the multi-beams interaction in the limited space is proposed in this paper. Four channels integrated TWT's electron gun and the beam transmission of the tube is simulated by software opera-3D. The design has been a viable integrated TWT electron optical system solutions,and the electron gun statics fluent can reach at least 99%, which provides the foundation for the design...
According to the original design of 30W level W-band folded waveguide CW traveling wave tube (TWT), a step-tapering structure was at the end of the uniform interaction circuit to improve the electron efficiency. Compared two kinds of tapering circuit, the results indicate that both circuits could achieve over 40W power at 91GHz∼97GHz. The electron efficiency could be improved from 3% to 4%. A collector...
This paper presents the design of a Q-Band helix-traveling wave tube (TWT). The simulation of electron gun, focusing magnetic system, the beam-wave interaction and a four-stage depressed collector is carried out and the results show that the design can satisfy the power goal of 200W and a 50% total efficiency.
This paper simulate field emitter arrays (FEAs) in the triode mode using Opera-3D. From the calculation data, the factors affecting the emission uniformity including tip height and tip-to-tip distance have been studied.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.