Gaussian beam filter with diagonal horn structure and implementation method thereof

A Gaussian beam and horn technology, applied in the field of Gaussian beam mode filter, can solve the problems of increasing the ohmic loss of the overmode waveguide transmission line, reducing the beam quality of the output port, and being difficult to meet the application standards.

Active Publication Date: 2017-12-29
PEKING UNIV
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the beam radiated by the Vlasov transmitter is not an ideal Gaussian beam, and the over-modulated waveguide transmission line requires precise excitation mode. Lowering the bar for hard-to-reach applications

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gaussian beam filter with diagonal horn structure and implementation method thereof
  • Gaussian beam filter with diagonal horn structure and implementation method thereof
  • Gaussian beam filter with diagonal horn structure and implementation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.

[0048] Such as figure 1 As shown, the Gaussian beam mode filter with a diagonal horn structure in this embodiment includes: a first corrugated horn, a transition section waveguide and a second corrugated horn.

[0049] In this embodiment, two identical corrugated horns are connected back to back by a waveguide in the transition section, the Gaussian beam propagates along the z direction, the working frequency is 224GHZ, and the curved surface profile of the horn adopts sin 2 type, the expression of its radius a(z) changing with the distance z is Oral radius a o = 3mm, back radius a i =0.65mm, in order to reduce the reflection caused by impedance mismatch, the groove depth of the corrugated groove changes with the radius, and the radius of the horn is a j place, groove depth d j The expression is This embodiment adopts the commercia...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention discloses a Gaussian beam mode filter with a diagonal horn structure and an implementation method thereof. The Gaussian beam mode filter with the diagonal horn structure is designed on the basis of a characteristic that a corrugated horn can generate high-purity hybrid HE11 modes and the principle of antenna reciprocity; when undesired Gaussian beams radiated from an gyrotron output window pass through a first corrugated horn, only a single TE11 mode passes the first corrugated horn; the TE11 mode is subjected to mode conversion of a second corrugated horn, so that highly-pure mixed HE11 modes are generated; and the highly-pure mixed HE11 modes are finally fed into an overmoded waveguide transmission line. With the Gaussian beam mode filter with the diagonal horn structure and the implementation method thereof of the invention adopted, the problem of undesired Gaussian modes of quasi-optical transmission can be solved, the purity of Gaussian modes fed into the transmission line can be effectively improved, and therefore, the high-efficiency transmission of terahertz waves can be realized.

Description

technical field [0001] The invention relates to the field of microwave devices, in particular to a Gaussian beam mode filter with a diagonal horn structure and a realization method thereof. Background technique [0002] As one of the radiation sources with the highest output power in the terahertz frequency band, gyrotrons are widely used as terahertz sources for electron cyclotron heating (ECRH), electron cyclotron diagnostics (ECD), and medical dynamic nuclear magnetic resonance (DNP-NMR). Electron cyclotron maser device is a fast wave device based on the mechanism of stimulated emission of electron cyclotron resonance in a longitudinal magnetic field. With the development of terahertz gyrotrons towards high power and high frequency, in order to improve the power capacity of the cavity and reduce the ohmic loss, the working mode of the gyrotron is usually a high-order mode. There is often a long transmission distance between the gyrotron and the application device, and th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/16H01P1/20H01P11/00
CPCH01P1/16H01P1/20H01P11/00H01P11/007
Inventor 蒲鸿刘濮鲲杜朝海
Owner PEKING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap