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High-precision broadband numerical control attenuator

A digitally controlled attenuator, high-precision technology, applied in frequency-independent attenuators, impedance networks, electrical components, etc., can solve problems such as poor attenuation accuracy, and achieve the requirements of avoiding insertion loss, improving adjustment accuracy, and improving attenuation accuracy Effect

Active Publication Date: 2017-07-07
NO 24 RES INST OF CETC
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AI Technical Summary

Problems solved by technology

[0005] The invention provides a high-precision broadband numerical control attenuator to solve the problem of poor attenuation accuracy existing in the current numerical control attenuator

Method used

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  • High-precision broadband numerical control attenuator
  • High-precision broadband numerical control attenuator
  • High-precision broadband numerical control attenuator

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Embodiment Construction

[0027] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings For further detailed explanation.

[0028] In the description of the present invention, unless otherwise specified and limited, it should be noted that the term "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be Directly connected or indirectly connected through an intermediary, those skilled in the art can understand the specific meanings of the above terms according to specific situations.

[0029] see Figure 4 , is a...

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Abstract

The invention provides a high-precision broadband numerical control attenuator, comprising a numerical control attenuator and a feedback compensation circuit. One end of the feedback compensation circuit is connected between an input end and an output end of the numerical control attenuator, and the other end is grounded. Feedback capacitances and / or feedback inductances corresponding to impedance values in the feedback compensation circuit are accessed to the numerical control attenuator according to band values of input signals of the numerical control attenuator and attenuation precision demands on different bands, thereby adjusting attenuation precision of selected bands. According to the attenuator, the attenuation precision of the corresponding bands of the input signals of the numerical control attenuator can be adjusted, electrical characteristics such as an insertion loss of the numerical control attenuator are influenced less, and the problems such as serious deterioration of the insertion loss, an input 1dB compression point, an input voltage standing wave coefficient and an output voltage standing wave coefficient are avoided.

Description

technical field [0001] The invention belongs to the field of attenuators in microwave single-chip microcomputer chips, and in particular relates to a high-precision broadband numerically controlled attenuator. Background technique [0002] The numerically controlled attenuator is a control device used to control the amplitude of radio frequency signals. It is mainly used in microwave communication systems with gain setting and control function requirements. It is responsible for equalizing the gains of different channels, especially an integral part of multi-channel systems. In "smart" antennas, electronic countermeasures systems, smart weapon systems, broadband communications, military radar, and GSM (Global System for Mobile Communication, Global System for Mobile Communications), PCS (Process Control System, process control system), 3GD and other different wireless applications system and other application fields, has a wide range of applications. [0003] There are gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H11/24
CPCH03H11/245
Inventor 刘成鹏王国强邹伟蒲颜
Owner NO 24 RES INST OF CETC
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