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.
This paper presents a simulation of Smith-Purcell (SP) radiation from dielectric loaded grating (DLG) at terahertz frequencies, which is performed by using a two-dimensional (2D) particle-in-cell (PIC) code. The simulation supposes a continuous electron beam passing over a DLG and metal grating, respectively. The results show that compared with metal grating, the usage of DLG can enhance the radiation...
In this paper, a simulation on the evanescent wave of Smith-Purcell (SP) radiation from dielectric loaded grating (DLG) is presented at terahertz frequencies. The evanescent wave provides feedback to bunch the electron beam, which is the basis of oscillator operation of SP free-electron laser (FEL). The results obtained from particle-in-cell (PIC) code are compared with metal grating, which show that...
In this paper, a dielectric loaded grating is proposed to enhance the Smith-Purcell (SP) radiation at terahertz frequencies. By using two-dimensional particleincell (PIC) code, the radiation power of dielectric loaded grating with different currents is simulated. The results show that compared with the metal grating, the dielectric loaded grating can decrease the threshold current and improve the...
A novel type of slow-wave structure for Smith-Purcell device called dielectric loaded metal grating, is proposed in this article. The three-dimensional (3D) analytical theory for the “hot” dispersion relation is derived using the field matched method and the results accord well with the simulation data performed by using 3D particle-in-cell (PIC) code.
In this paper, with the help of a two-dimensional (2D) particle-in-cell (PIC) code, a simulation of Smith-Purcell (SP) radiation from the dielectric loaded grating is performed in the terahertz regime. The results show that the SP radiation frequency is in good agreement with the theoretical curve. Comparing with the general grating, the usage of dielectric loaded grating enhances the evanescent wave,...
A novel monoblock dielectric filter is presented in this paper. The proposed filter is made from a single piece of ceramic with silver-plated external surfaces and a metallic lid for hosting tuning screws. The dominant mode is supported by a centered dielectric rod with one end short-circuited. Not requiring a metallic housing and dielectric resonator mounting fixture,...
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.