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Radio-frequency power regulation method and radio-frequency power amplifier

A technology of radio frequency power and adjustment method, applied in the electrical field, can solve the problems of large cooling system, low working efficiency, large dissipation and so on

Inactive Publication Date: 2009-09-02
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest problem with this kind of RF power supply is that because the power device works in the linear amplification region, the system has low working efficiency, large dissipation, and a huge cooling system

Method used

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  • Radio-frequency power regulation method and radio-frequency power amplifier
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  • Radio-frequency power regulation method and radio-frequency power amplifier

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] The radio frequency power adjustment method of the present invention first operates the power MOS tube of the power amplifier in the switch state; then after the output pulse of the quartz crystal oscillator is converted into a drive signal with adjustable pulse width, the gate of the MOS tube is driven; finally The stable adjustment of output power is realized by adjusting the pulse width of the power MOS transistor gate drive signal and the primary access voltage value of the unbalanced transformer.

[0020] The radio frequency power amplifier provided by this embodiment, such as figure 1 As shown, it includes a control unit, a voltage controllable DC power supply, a driving signal generation unit and a power amplification unit, where:

[0021] The control unit is connected with the voltage controllable DC power supply and the driving signal generating unit, ...

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Abstract

The invention discloses a radio-frequency power regulation method and a radio-frequency power amplifier. The method comprises the following steps: a power MOS tube of a power amplifier works under the on-off state; the output pulse of a quartz-crystal oscillator is transformed into a driving signal with adjustable pulse width, and the gate pole of the MOS tube is driven; and the stabilization regulation of the output power is realized by adjusting the pulse width of the driving signal of the gate pole of the power MOS tube and the primary access voltage value of an unbalanced transformer. In addition, the radio-frequency power amplifier comprises a controlling unit, a driving signal generation unit, a power amplifying unit and a voltage controllable direct-current power supply. The radio-frequency power amplifier controls the radio-frequency output power by adjusting the pulse width of the driving signal and the output voltage of the voltage controllable direct-current power supply. The invention realizes the control to the radio-frequency output power by the method of combining the pulse width adjustment of the driving signal and the power supply voltage adjustment of the direct-current main power supply and enhances the reliability and the stability of power control.

Description

technical field [0001] The invention relates to a radio frequency power adjustment method and a radio frequency power amplifier, belonging to the field of electricity. Background technique [0002] Among modern analytical testing instruments, ICP-MS and ICP-AES (OES) are some sophisticated analytical testing instruments, which can quickly and simultaneously detect almost all elements on the periodic table, and have become recognized as the most powerful means of elemental analysis. In this type of instruments, the common feature is that they all use radio frequency generators, that is, radio frequency power supplies. All solid-state radio frequency power supplies are the development trend of radio frequency power supplies. The main feature of the existing all-solid-state RF power supply working in other excitation mode is that the power device works in the amplification region, and the output power can be adjusted by adjusting the amplitude of the driving signal. The bigges...

Claims

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Application Information

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IPC IPC(8): H03G3/20G05F1/66H03F3/189H03F3/20
Inventor 金星石宝松王超张莉君
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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