Design method for broadband coaxial window

A design method and technology of coaxial window, applied in the direction of the coupling device of the transit time type electron tube, etc., can solve the problems of time-consuming, inability to quickly and accurately obtain the initial structure size that meets the requirements, and high consumption of computer resources, etc. Effect

Active Publication Date: 2016-02-03
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the prior art that the design of broadband coaxial windows takes a long time, consumes a lot of computer resources, and cannot quickly and accurately obtain the initial structural size that meets the requirements, and proposes a design method for broadband coaxial windows

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  • Design method for broadband coaxial window
  • Design method for broadband coaxial window
  • Design method for broadband coaxial window

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Embodiment Construction

[0029] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] The invention provides a design method of a broadband coaxial window, such as image 3 shown, including the following steps:

[0031] S1. Determine the inner conductor radius a and the outer conductor inner radius b of the coaxial line according to the operating frequency range and power capacity of the microwave window;

[0032] The coaxial cable, like the waveguide, has a unified standard. The most typical impedance values ​​used for coaxial cables are 50 ohms and 75 ohms. The standard impedance used in many European countries is around 60 ohms. When designing, standard coaxial cables can be selected directly according to the operating frequency range and power capacity requirements. When designing a coaxial cable, its size needs to meet two requirements: (1) Ensure single-mode transmission in TEM mode. (2) Take into account the requirement...

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Abstract

The invention discloses a design method for a broadband coaxial window, and belongs to the technical field of vacuum electronic device microwave energy transmission windows. According to the method, the coaxial window size preliminarily meeting the requirements is rapidly obtained by the condition of no reflection of center frequency by utilizing an equivalent circuit model of the broadband coaxial window through combination of the microwave network theory, and then structural parameters are scanned and optimized within a small range by utilizing three-dimensional electromagnetic field numerical simulation software so that the structural size meeting the performance requirements can be rapidly obtained. The initial structural size of the broadband coaxial window meeting the specific performance requirements can be rapidly and accurately obtained, problems of high time consumption and high computer resource consumption caused by designing by means of three-dimensional electromagnetic simulation software purely can be overcome, and thus the effective method is provided for the high-speed and high-efficiency design of the high-performance coaxial window.

Description

technical field [0001] The invention belongs to the technical field of microwave energy transmission windows of vacuum electronic devices, and in particular relates to a design method of a broadband coaxial window. Background technique [0002] Microwave energy transmission window is one of the key components of vacuum electronic devices. Its function is to isolate the high-vacuum environment inside the device from the external atmospheric environment, and at the same time transmit high-frequency power to the load or antenna with as little reflection as possible. The performance of the microwave energy transmission window has an important impact on the frequency band, power capacity, reliability and lifetime of the device. [0003] Among various microwave energy transmission windows, the coaxial window has become the most commonly used structure in small and medium power traveling wave tubes due to its simple structure and process and wide operating frequency band. In the c...

Claims

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Application Information

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IPC IPC(8): H01J23/48
Inventor 朱小芳胡权胡玉禄徐立李斌
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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