Low phase differential broadband digital attenuator IC of microwave and millimeter wave

A technology of digital attenuator and integrated circuit, applied in frequency-independent attenuator, multi-terminal pair network, etc., can solve the problem of large difference of VSWR between input and output terminals, difficulty in meeting requirements of electrical performance indicators, and electrical performance between circuits. Poor consistency and other issues, to achieve the effect of simple circuit topology, excellent comprehensive electrical performance indicators, and large attenuation dynamic range

Inactive Publication Date: 2007-05-23
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For similar products of microwave and millimeter wave broadband digital attenuator integrated circuits, due to the defects of the circuit topology and process implementation methods used in the design, especially when the application requirements for frequency bandwidth and large attenuation are required, the electrical performance indicators are usually difficult to meet the requirements.
The main disadvantages are: 1) the circuit topology is complex; 2) the design is difficult; 3) the process is difficult; 4) the attenuation accuracy is low; 5) the working frequency band is narrow; When changing, the accompanying signal phase changes greatly; 7) The VSWR ratio of the input and output terminals of each decay state is greatly different; 8) The yield is low; 9) Affected by process control parameters, the electrical performance consistency between circuits is poor ; 10) Larger circuit size
In particular, the large phase difference between each decay state is a common shortcoming of many similar products, which limits the wide application of this type of product in phased array radar systems and many advanced communication systems and weapon systems

Method used

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  • Low phase differential broadband digital attenuator IC of microwave and millimeter wave
  • Low phase differential broadband digital attenuator IC of microwave and millimeter wave
  • Low phase differential broadband digital attenuator IC of microwave and millimeter wave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: In combination with Fig. 1 and Fig. 2, when a field effect transistor is used as the control device of a broadband SPDT switch, a bit with a fixed attenuation difference is composed of a reference path microstrip line branch and a Π-type resistance attenuation network branch When the microwave and millimeter wave low phase difference broadband digital attenuator is used, the control device of the broadband single-pole double-throw switch is composed of the input / output port, two control terminals, four field effect transistors, nine-segment microstrip lines and seven resistors. That is, the port P1 is the input / output port of the microwave and millimeter wave signals. The port P1 is connected to one end of the microstrip line W1, and the other end of the microstrip line W1 is connected to one end of the microstrip line W2 and the microstrip line W3. The microstrip line W2 The other end of the field effect transistor F3 is connected to the drain, the source ...

Embodiment 2

[0019]Embodiment 2: in conjunction with Fig. 1, Fig. 3, when adopting field-effect transistor as the control device of broadband single-pole double-throw switch, by reference microstrip line branch and T-shaped resistance attenuation network branch constitute a bit with fixed attenuation difference For microwave and millimeter wave low phase difference broadband digital attenuators, the control device of broadband single-pole double-throw switch is composed of input / output ports, two control terminals, four field effect transistors, nine-segment microstrip lines and seven resistors, namely The port P11 is the input / output port of the microwave and millimeter wave signal, the port P11 is connected to one end of the microstrip line W11, the other end of the microstrip line W11 is connected to one end of the microstrip line W22 and the microstrip line W33, and the microstrip line W22 The other end is connected to the drain of the field effect transistor F33, the source of the fiel...

Embodiment 3

[0020] Embodiment 3: In combination with Fig. 1 and Fig. 4, when a PIN diode is used as the control device of a broadband SPDT switch, a microwave with a fixed attenuation difference is formed by the reference microstrip line branch and the Π-type resistance attenuation network branch. For the millimeter wave low phase difference broadband digital attenuator, the control device of the broadband SPDT switch is composed of input / output ports, two control terminals, four PIN diodes, ten microstrip lines, six resistors, and five inductors , that is, the port P3 is the input / output end of the microwave and millimeter wave signals, the port P3 is connected to one end of the microstrip line X1 and the inductor L1, the other end of the inductor L1 is grounded, and the other end of the microstrip line X1 is connected to the microstrip line X2 and the microstrip line One end of the strip line X3, the other end of the microstrip line X2 is connected to the anode of the PIN diode D3, the c...

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Abstract

The invention relates to a microwave millimeter wave low-phase-different wide-frequency digit attenuation integral circuit, wherein it is formed by one or more attenuation integral circuits; said circuit is formed by two wide-band single-pole double-throw switches, reference micro band, resistance attenuation network, input/output and two controllers; the controller functions right signal on two single-pole double-throw switches, the reference micro band will be connected or stopped, and the attenuation network will be stopped or connected; two branches outputs signal with fixed attenuation values and fixed phase. The invention has simple structure and wide work frequency, etc.

Description

A technical field [0001] The invention relates to an electronic component used for radar, communication and guidance, in particular to a microwave and millimeter wave low phase difference wideband digital attenuator integrated circuit. Two background technology [0002] Microwave and millimeter wave low phase difference broadband digital attenuator integrated circuit is an electronic component mainly used in electronic system equipment such as digital microwave communication, mobile communication, radar, electronic countermeasures, guidance and instruments. In the control circuit of the broadband microwave and millimeter wave frequency band, the microwave and millimeter wave digital attenuator is one of the main control circuits. The main technical indicators describing the performance of this product are: 1) Operating frequency bandwidth; 2) Attenuation bits; 3) Total Attenuation 4) Attenuation accuracy; 5) Attenuation step; 6) Minimum insertion loss; 7) Phase difference of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H11/24
Inventor 戴永胜方大纲沈博姚蕴张宇峰向明飞张娟周小闯
Owner NANJING UNIV OF SCI & TECH
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