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Constant wave system for acquiring uniform microwave fields and method for acquiring uniform microwave fields

A microwave field and uniform technology, applied in the field of microwave systems, can solve the problems affecting the reliability of item effect analysis results, the randomness of item effects, and inability to repeat, and achieve the effects of easy repeatability, high uniformity, and uniformity improvement.

Active Publication Date: 2017-07-28
CHENGDU QIANNIU INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inhomogeneity of the microwave in the microwave heating device, the processed item effect is almost random and cannot be repeated at all, which seriously affects the reliability of the item effect analysis results

Method used

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  • Constant wave system for acquiring uniform microwave fields and method for acquiring uniform microwave fields
  • Constant wave system for acquiring uniform microwave fields and method for acquiring uniform microwave fields
  • Constant wave system for acquiring uniform microwave fields and method for acquiring uniform microwave fields

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Experimental program
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Effect test

Embodiment 1

[0042] The present invention is realized through the following technical solutions: as figure 1 As shown, a constant wave system for obtaining a uniform microwave field includes a controller 001, a solid-state microwave source 002 connected through a waveguide, an exciter 003, a circulator 004, a first two-way directional coupler 006, and a second two-way directional coupler 007. Reactor 005. The first high-power matching load 008. The second high-power matching load 009.

[0043] The circulator 004 includes three ports connected to the first end of the exciter 003, the second end to feed the microwave into the reactor 005 through the first two-way directional coupler 006, and the third end to the first high-power matching load 008. A microwave source 002, an exciter 003, a circulator 004, a first bidirectional directional coupler 006, a reactor 005, a second bidirectional directional coupler 007, and a second high-power matching load 009 are connected in sequence.

[0044] T...

Embodiment 2

[0059] The present invention is realized through the following technical solutions: as figure 2 As shown, on the basis of Embodiment 1, an adjustable waveguide pin 010 is added.

[0060] A constant wave system for obtaining a uniform microwave field, including a controller 001, a solid-state microwave source 002 connected through a waveguide, an exciter 003, a circulator 004, a first two-way directional coupler 006, a second two-way directional coupler 007, and a reaction 005, the first high-power matching load 008, the second high-power matching load 009, and the adjustable waveguide pin 010.

[0061] The adjustable waveguide pin 010 is arranged between the second two-way directional coupler 007 and the first high-power matching load 008 . The adjustable waveguide pin 010 includes a three-pin adjuster for manually adjusting microwave reflected power and a rectangular waveguide matched with the three-pin adjuster.

[0062] The circulator 004 includes three ports connected t...

Embodiment 3

[0072] In this embodiment, on the basis of Embodiment 1 or 2, the method for obtaining the standing wave ratio s is further described. The first two-way directional coupler 006 collects the microwave input power Pi1 and the microwave reflected power Pf1 at the inlet port of the reactor 005, and at the same time The second two-way directional coupler 007 collects the microwave input power Pi2 and the microwave reflected power Pf2 at the outlet of the reactor 005, and a total of 4 signals are sent to the controller 001 for processing to analyze the standing wave ratio s of the microwave field in the resonant cavity of the reactor 005 Situation: If the standing wave ratio s satisfies 1<s≤1.2, the microwave field is uniform; otherwise, the microwave field is not uniform.

[0073] The use of directional couplers to collect power and the conversion relationship between input power, reflected power and standing wave ratio s are all existing technologies. This application only uses exi...

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Abstract

The invention discloses a constant wave system for acquiring uniform microwave fields. The system comprises a controller, and also comprises a solid-state microwave source, an exciter, an annular device, a first bidirectional directional coupler, a second bidirectional directional coupler, a reactor, a first large power matching load and a second large power matching load which are connected through waveguides. The invention also discloses a method for acquiring uniform microwave fields. The method comprises steps of analyzing the standing-wave ratio s in a resonance cavity of the reactor and adjusting impedance matching according to conditions of the standing-wave ratio s through the controller; ad during adjustment of the impedance matching, adjusting the temperature of the second large power matching load to reach a load standard temperature value and be constant in a constant wave system through the controller so as to acquire uniform microwave fields in the resonance cavity of the reactor, wherein the load standard temperature value refers to the temperature corresponding to the second large power matching load when the impedance matching meets requirements in the constant wave system. According to the invention, by controlling the load temperature of the power matching, uniform microwave fields meeting requirements are formed in the resonance cavity of the reactor.

Description

technical field [0001] The invention relates to the field of microwave systems, in particular to a constant wave system for obtaining a uniform microwave field and a method for obtaining a uniform microwave field. Background technique [0002] As a clean energy, microwave has the characteristics of fast heating speed and overall heating, and has been widely used in high-temperature calcination of materials, food drying, wastewater treatment and other fields. [0003] Impedance matching is an important concept in microwave transmission technology. The key to impedance matching is to eliminate the reflected wave of the waveguide load. When the inductance and capacitance of the waveguide load are not equal, reflected waves will be generated at the end of the waveguide. The reflected wave The wave is equal to the reflected wave of the waveguide load and opposite in direction, so it can cancel the reflected wave of the waveguide load. Generally, the adapter used in microwave tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/64H05B6/68
CPCH05B6/6402H05B6/68
Inventor 周晓军黎晓云肖思林夏欣然刘韬
Owner CHENGDU QIANNIU INFORMATION TECH
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