Fast automatic power closed-loop control device and method of wireless power amplifier
A power amplifier and automatic power technology, applied in the direction of amplification control, gain control, electrical components, etc., can solve the problems of not being able to meet the wide frequency band, low closed-loop speed, and low closed-loop precision, and achieve accurate detection level, The effect of good flatness of power transmission and fast power output closed loop
Inactive Publication Date: 2016-01-20
GUANGZHOU HAIGE COMM GRP INC
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Problems solved by technology
[0003] The current power closed-loop method mainly adopts the analog ALC method. The traditional analog ALC closed-loop system has a low closed-loop speed and is mainly suitable for narrow-band, low-speed, fixed-frequency communication equipment, which cannot well meet the wide-band, frequency-hopping and high-power systems of modern communications.
In addition, due to the limitation of the temperature characteristics of the analog circuit itself and the limitation of the broadband frequency response characteristics of the analog closed-loop system, under the wide temperature environment and broadband high-power working conditions, the reference levels of the same power in different frequency bands are actually different, while the reference level of the analog closed-loop is only One can be maintained, causing problems such as low closed-loop precision and slow closed-loop speed
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[0038] Such as figure 1 , figure 2As shown, a fast automatic power closed-loop control device of a wireless power amplifier in this embodiment includes a power amplifier unit and an ALC unit, and the power amplifier unit includes a multi-stage power amplifier circuit (two-stage power amplification is selected in this embodiment), A multi-channel filter used to set the passband range of the filter according to the operating frequency to avoid wireless channel interference between devices and a forward power detection circuit used to obtain the forward power level representing the RF power output, and for the ALC unit For closed-loop requirements, a forward power detection circuit is designed, including a radio frequency power coupler, an integrator, and a smoothing filter. The forward power level VR representing the radio frequency power output is obtained through the forward power detection circuit. The multi-stage power amplifier units are connected in series, and the multi...
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The present invention discloses a fast automatic power closed-loop control device and method of a wireless power amplifier. The device comprises a power amplifier unit and an ALC unit. The power amplifier unit comprises a multiple-level power amplifier circuit and a forward power detection circuit. The ALC unit comprises an FPGA chip, an RF signal generator, a frequency hopping communication controller, a first memory, an AD converter and a digitally controlled attenuator. According to the fast automatic power closed-loop control device and method of a wireless power amplifier, a mature digital integrated chip is used, through digital calculation, on one hand, the problem of the insufficient closed-loop precision of a common analog closed-loop control caused by the influence of temperature the device characteristics can be solved, on the other hand, the closed-loop rate can be increased, and the requirement of high-speed frequency-hopping radio communication system rapid power closed loop is satisfied.
Description
technical field [0001] The invention relates to the research field of wireless power amplifiers, in particular to a fast automatic power closed-loop control device and method for wireless power amplifiers. Background technique [0002] As an effective anti-interference and anti-interception wireless communication method, high-power, wide-band frequency-hopping communication is widely used in military, rescue and commercial communications. High-power, wide-band frequency-hopping communication has high requirements for real-time performance. The information of each hop must be processed in a very short time, and the output power closed-loop of wireless radio frequency signals, as an important function, must be processed in a shorter time. Make the output power meet the standard requirements. Power ALC (Automatic level control) is a wireless communication equipment power closed-loop control technology, which can realize the self-closed loop of the system output power when vari...
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IPC IPC(8): H03G3/20
Inventor 李元帅卿剑
Owner GUANGZHOU HAIGE COMM GRP INC