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Broadband microwave coaxial automatic impedance modulator

An automatic impedance and adjuster technology, which is applied to waveguide-type devices, circuits, connecting devices, etc., can solve the problems of limited impedance tuning range and narrow operating frequency band of impedance converters, and achieves wide adjustment range, simple structure and robustness. Good results

Inactive Publication Date: 2018-09-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

This leads to a narrow operating frequency band of the impedance transformer of the waveguide
And because the rectangular waveguide is a dispersive transmission line, the waveguide wavelength of microwaves of different frequencies in the waveguide has a nonlinear relationship with the free space wavelength, so the impedance tuning range is also greatly limited

Method used

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  • Broadband microwave coaxial automatic impedance modulator
  • Broadband microwave coaxial automatic impedance modulator
  • Broadband microwave coaxial automatic impedance modulator

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] This embodiment provides a broadband microwave coaxial automatic impedance adjuster. The three-dimensional structural schematic diagram, three-dimensional structural perspective view and plane longitudinal section view of the impedance adjustment part are respectively as follows Figure 1-3 As shown, the structure diagram of the automatic impedance adjuster is shown in Figure 4 As shown, it includes a standing wave detection module, a frequency detection module, an impedance adjustment module, a micro-processing module and a drive motor;

[0019] The impedance adjustment module includes a coaxial main transmission line and two coaxial adjustment branches 6; the coaxial main transmission line includes a first main transmission line 1 and a second main transmission line 2; the second main transmission line is a coaxial waveguide with a corner; the...

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Abstract

The invention discloses a broadband microwave coaxial automatic impedance modulator, and belongs to the technical field of microwave impedance modulators. The modulator comprises a standing wave detection module, a frequency detection module, an impedance modulation module, a microprocessor module and a driving motor. The standing wave detection module is used for measuring the amplitude and the phase of a reflection coefficient in a coaxial main transmission line. The frequency detection module is used for measuring the current working frequency. The microprocessor calculating module is usedfor reading the reflection coefficient and the working frequency, and then calculating to obtain the lengths of two coaxial matching branch sections in order to match with the system. Furthermore, thelength required by the matching of the system is converted into the positions of two short-circuit sliding blocks and then the positions of the two sliding blocks are adjusted through the driving motor. Therefore, the automatic matching of the impedance is achieved. The defect that the working bandwidth is narrow due to the dispersion effect in the prior art is overcome. The working bandwidth ofthe automatic impedance matching device is greatly expanded on the basis of ensuring the power capacity and the distribution range.

Description

technical field [0001] The invention belongs to the technical field of microwave impedance adjusters, in particular to a broadband microwave coaxial automatic impedance adjuster. Background technique [0002] Impedance matching in microwave transmission can make the system stable and efficient, and it is extremely important in microwave energy applications. In the case of a fixed load impedance, a fixed impedance transformer or a manual impedance adjuster is usually used to achieve impedance adjustment and matching. However, in applications where the load is constantly changing (such as microwave plasma, microwave drying and heating, etc.), the load situation will continue to change. Fixed or manual impedance adjusters cannot meet the needs of system changes. Only automatic impedance adjusters can solve this problem. a question. The traditional automatic impedance adjuster consists of three pins in a rectangular waveguide or a single pin passes through the top slot of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/12
CPCH01P5/12
Inventor 张朝阳胡诗婕傅文杰鄢扬
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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