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A microwave broadband temperature compensation attenuator

A technology of temperature compensation and attenuator, applied in the fields of instrument, calculation, electrical digital data processing, etc., can solve the problems of poor electrical performance index, unfavorable system integration, small attenuation compensation amount, etc. Low loss effect

Pending Publication Date: 2019-04-26
NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature-compensated attenuator with the traditional thermistor structure uses the temperature characteristics of the resistor to achieve temperature compensation. Due to the large limitation of the resistor process, the electrical performance index is poor, the attenuation compensation amount is small, the frequency bandwidth is narrow, the circuit is complex, and the size is large. Conducive to system integration

Method used

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  • A microwave broadband temperature compensation attenuator
  • A microwave broadband temperature compensation attenuator
  • A microwave broadband temperature compensation attenuator

Examples

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Embodiment 1

[0020] Embodiment 1: The specific circuit of the temperature compensation attenuator disclosed by the present invention is as follows figure 2 As shown, the negative temperature coefficient LDO module includes: a negative temperature coefficient bandgap reference unit, a zero temperature coefficient bandgap reference unit, a subtractor and an operational amplifier, and the output of the two bandgap references is connected to the input end of the subtractor. The output terminal of the subtractor is connected to the input terminal of the operational amplifier, and the output terminal of the operational amplifier is connected to the control terminal of the analog attenuator module. The π-type structure analog attenuator module includes two branches connected to the transmission line between the input terminal and the output terminal, each branch contains a series connection of FET and resistor R 1 , the drain of the FET is connected to the transmission line, and the source of th...

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Abstract

The invention discloses a microwave broadband temperature compensation attenuator, relates to a waveguide type device, and belongs to the technical field of basic electrical elements. The temperaturecompensation attenuator comprises an analog attenuator module and a negative temperature coefficient LDO module, the analog attenuator module and the negative temperature coefficient LDO module are connected between an input terminal and an output terminal, the negative temperature coefficient LDO module is formed by combining a band gap reference, a subtracter and an operational amplifier, and the analog attenuator module is formed by combining an FET and a resistor. The attenuator disclosed by the invention is wide in frequency range, wide in temperature compensation range, small in input and output voltage standing-wave ratio, small in circuit size, simple to control and convenient to use, and has a very good application prospect in a radio frequency microwave integrated circuit.

Description

technical field [0001] The invention discloses a microwave broadband temperature compensation attenuator, relates to a waveguide device and belongs to the technical field of basic electrical components. Background technique [0002] In electronic communication systems, temperature-compensated attenuators are widely used in electronic countermeasures, radar systems, microwave communication systems and measurement systems as control components for controlling signal amplitude changes. In recent years, phased array chips and systems based on process technology have become a research hotspot at home and abroad. With the continuous improvement of phased array technology's requirements for antenna beam control, the research on the high and low temperature consistency of microwave circuits, especially the temperature-compensated attenuator has important significance and practical value. The technical indicators of the temperature compensated attenuator mainly include: working freq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/36
Inventor 童伟沈宏昌李健康何环环
Owner NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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