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Broadband pre-stabilized amplitude dynamic adjusting circuit and adjusting method

A dynamic adjustment and pre-stabilization technology, applied in the field of testing, can solve the problems of increased hardware cost, different, inflexible debugging, etc., and achieve the effect of low cost, flexible debugging, convenient and quick setting

Inactive Publication Date: 2018-11-30
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The usual technology is to divide the frequency band input, that is, different frequency bands go through different channels, and the attenuation or amplification factor in different channels is different, that is, the pre-attenuation technology, which can also ensure that the entire frequency band has better flatness, but this will increase the hardware. Cost, at the same time, due to the fixed hardware path, the debugging is not flexible

Method used

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  • Broadband pre-stabilized amplitude dynamic adjusting circuit and adjusting method

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Embodiment 1

[0018] A wideband pre-stabilized amplitude dynamic adjustment circuit, such as figure 1 As shown, it includes PIN diodes, amplifiers, detectors, comparators, I / Q modulators and DA preset circuits; among them, PIN diodes, amplifiers, detectors and comparators are connected in sequence to form a closed-loop feedback path; DA preset circuits and the wave detector are respectively connected to the input end of the comparator through lines; the output end of the comparator and the anode of the PIN diode are connected through lines; the common end of the amplifier and the wave detector is connected to the input end of the I / Q modulator.

Embodiment 2

[0020] On the basis of the above-mentioned embodiments, the present invention also mentions a dynamic adjustment method for broadband pre-stabilization amplitude, which specifically includes the following steps:

[0021] Step 1: Through the DA preset circuit, set different DA preset voltages for different frequency bands;

[0022] Step 2: Determine the power detected by the detector and the magnitude of the DA preset voltage;

[0023] If: the judgment result is that the power detected by the detector is greater than the DA preset voltage, then perform step 3;

[0024] Or when the judgment result is that the power detected by the detector is less than the DA preset voltage, then perform step 4;

[0025] Step 3: Dynamically adjust the current on the PIN diode through the comparator to reduce the current acting on the PIN diode, thereby attenuating the input signal power before the amplifier, thereby reducing the I / Q modulation input power;

[0026] Step 4: Dynamically adjust t...

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Abstract

The invention discloses a broadband pre-stabilized amplitude dynamic adjusting circuit and adjusting method, and belongs to the technical field of testing. The circuit comprises a PIN diode, an amplifier, a detector, a comparator, an I / Q modulator and a DA preset circuit. The PIN diode, the amplifier, the detector and the comparator are sequentially connected to form a closed-loop feedback path; the DA preset circuit and the detector are separately connected to an input end of the comparator through lines; an output end of the comparator and an anode of the PIN diode are connected through a line; a common end of the amplifier and the detector is connected to an input end of the I / Q modulator. According to the broadband pre-stabilized amplitude dynamic adjusting circuit and adjusting method, the attenuation values of different frequency bands are adjusted by setting different preset voltages in different frequency bands, at the same time, a negative feedback circuit structure is introduced, and input power is preset and dynamically adjusted in different frequency bands to ensure that the power input to the I / Q modulator is flat in the whole working frequency band, therefore the vector modulation performance index of the I / Q modulator is improved.

Description

technical field [0001] The invention belongs to the technical field of testing, and in particular relates to a broadband pre-stabilizing amplitude dynamic adjustment circuit and an adjustment method. Background technique [0002] Due to the rapid development of digital communication technology, people have more and more demand for signal generators with vector modulation function. At the same time, the development of 5G communication, unmanned vehicles and other technologies requires higher and higher frequency range of signals. The frequency coverage of the signal generator places wider demands on it. The input frequency range of a single I / Q modulator can reach 3-20GHz, or even wider, which requires the input power in a wide frequency band to be flat enough. The usual technology is to divide the frequency band input, that is, different frequency bands go through different channels, and the attenuation or amplification factor in different channels is different, that is, th...

Claims

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Application Information

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IPC IPC(8): H04B1/04H04B1/00
CPCH04B1/04H04B1/005H04B2001/0408H04B2001/0416
Inventor 马立坤杨彪薛晓男李增红柳瑞丛
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP