A dynamic power supply system for radio frequency power amplifiers and a control method

By using the envelope detection and mapping module in the dynamic power system, combined with the Delta-Sigma modulator, high efficiency and low noise of RF power amplifiers in shortwave wireless transmission systems are achieved, solving the problems of RF power amplifier efficiency and performance in large operating bandwidth and complex environments.

CN115333485BActive Publication Date: 2026-06-26KUSN JIUHUA ELECTRONICS EQUIP FACTORY
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Patent Information

Application Number
CN202210850369.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-07-19
Publication Date
2026-06-26
Estimated Expiration
2042-07-19

AI Technical Summary

Technical Problem

Existing dynamic power supply technology has limited application in the field of shortwave wireless transmission, especially in large operating bandwidth and complex environments. The RF power amplifier has low efficiency and poor performance in terms of spurious and near-carrier noise, making it difficult to meet the needs of broadband high-power communication systems.

Method used

The dynamic power supply system, consisting of an envelope detection module, an envelope mapping module, a Class S power amplifier, a mapping establishment module, and a feedback demodulation module, achieves dynamic voltage power supply through envelope signal mapping and a Delta-Sigma modulator. Combined with feedback loop adjustment, it ensures that the RF power amplifier maintains constant gain and high efficiency in large operating bandwidths and complex environments.

Benefits of technology

It improves the efficiency of the RF power amplifier, reduces spurious and near-carrier noise, enhances the system's adaptability and practicality, and solves the application problems in broadband high-power communication systems.

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Abstract

The application relates to a dynamic power supply system and control method for a radio frequency power amplifier, which comprises an envelope detection module, an envelope mapping module, an S-class power amplifier, a mapping establishment module and a feedback demodulation module. The envelope mapping module converts the envelope of a transmitting signal into a control voltage according to a mapping relationship, and the S-class power amplifier efficiently generates a dynamic power supply voltage proportional to the control voltage to supply power to the radio frequency power amplifier, thereby improving the efficiency of the radio frequency power amplifier. The envelope mapping relationship is provided by the mapping establishment module. The mapping establishment module combines and adjusts the transmitting path gain and the maximum power supply voltage, so that the radio frequency power amplifier works in a predetermined compression state, and the envelope mapping relationship is established according to the constant gain criterion. The application can provide dynamic power supply for the radio frequency power amplifier under a large working bandwidth and a complex working environment, effectively improve the efficiency of the radio frequency power amplifier, and has excellent spurious and near-carrier noise suppression capability.
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Citation Information

Patent Citations

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    CN102299689B

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    EP2824978A1

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    US20160249300A1