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Microwave millimeter wave ultra-wide band low phase shift six-figure attenuator

A digital attenuator, millimeter-wave technology, applied in electrical components, multi-terminal pair networks, impedance networks, etc., can solve the problem of large voltage standing wave ratio at the input and output terminals of the attenuation state, circuit topology and process implementation path defects, electrical performance indicators It is difficult to meet the requirements and other problems, and achieve the effects of high attenuation accuracy, excellent comprehensive electrical performance indicators, and simple design.

Inactive Publication Date: 2011-05-11
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar products of microwave and millimeter wave ultra-broadband low-phase-shift six-digit digital attenuators are usually difficult to meet the requirements of electrical performance indicators due to the defects of the circuit topology and process implementation methods used in the design.
The main disadvantages are: 1) the circuit topology is complex; 2) the design is difficult; 3) the process is difficult; 4) the insertion loss of each attenuation state is large; The voltage standing wave ratio of the input and output terminals in the attenuation state is large; 8) the working frequency band is narrow; 9) the circuit size is large; 10) the control is complicated and inconvenient to use
In particular, the large phase shift of each attenuation 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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  • Microwave millimeter wave ultra-wide band low phase shift six-figure attenuator
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  • Microwave millimeter wave ultra-wide band low phase shift six-figure attenuator

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1. combine figure 1 , figure 2 , the microwave and millimeter wave ultra-broadband low-phase-shift six-digit digital attenuator of the present invention, the 0.5dB attenuation unit adopts a pseudo-structure high electron mobility transistor as an ultra-broadband switch control device, and adopts a T-shaped topology.

[0023] figure 2 The scheme consists of a microwave and millimeter wave input port (Pa1), a microwave and millimeter wave output port (Pa2), a pseudostructure high electron mobility transistor (Fa1), three microstrip lines (Ma1, Ma2, Ma3) and two Composed of only resistors (Ra1, Ra2), the microwave and millimeter wave input port Pa1 is connected to one end of the microstrip line Ma1, the other end of the microstrip line Ma1 is connected to one end of the microstrip line Ma2, and the other end of the microstrip line Ma2 is connected to the microwave and millimeter wave output Port Pa2, the microstrip line Ma1 is connected to one end of the micro...

Embodiment 2

[0024] Example 2. combine figure 1 , image 3 , the microwave and millimeter wave ultra-broadband low-phase-shift six-digit digital attenuator of the present invention, the 1dB attenuation unit adopts a pseudo-structure high electron mobility transistor as an ultra-broadband switch control device, and adopts a T-type topology.

[0025] image 3 The scheme consists of a microwave and millimeter wave input port (Pb1), a microwave and millimeter wave output port (Pb2), a pseudostructure high electron mobility transistor (Fb1), three microstrip lines (Mb1, Mb2, Mb3) and two Composed of only resistors (Rb1, Rb2), the microwave and millimeter wave input port Pb1 is connected to one end of the microstrip line Mb1, the other end of the microstrip line Mb1 is connected to one end of the microstrip line Mb2, and the other end of the microstrip line Mb2 is connected to the microwave and millimeter wave output Port Pb2, the microstrip line Mb1 is connected to one end of the microstrip ...

Embodiment 3

[0026] Example 3. combine figure 1 , Figure 4 , the microwave and millimeter wave ultra-broadband low-phase-shift six-digit digital attenuator of the present invention, the 2dB attenuation unit adopts a pseudo-structure high electron mobility transistor as an ultra-broadband switch control device, and adopts a Π-type topology.

[0027] Figure 4The scheme consists of a microwave millimeter wave input port (Pc1), a microwave millimeter wave output port (Pc2), three high electron mobility transistors (Fc1, Fc2, Fc3) with pseudo-structure, and six microstrip lines (Mc1, Mc2, Mc3, Mc4, Mc5, Mc6) and six resistors (Rc1, Rc2, Rc3, Rc4, Rc5, Rc6), the microwave and millimeter wave input port Pc1 is connected to one end of the microstrip line Mc1, and the other end of the microstrip line Mc1 is connected to the dummy The source of the high electron mobility transistor Fc3 with a matching structure, the microstrip line Mc1 is connected to one end of the source of the pseudo-structu...

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Abstract

The invention discloses a microwave millimeter wave ultra-wide band low phase shift six-figure attenuator formed by cascading a 0.5dB attenuation unit, a 1dB attenuation unit, a 2dB attenuation unit, a 4dB attenuation unit, a 8dB attenuation unit and a 16dB attenuation unit, wherein the 0.5dB attenuation unit and the 1dB attenuation units are in T-shaped topological structures; the 2dB attenuation unit and the 4dB attenuation units are in an n-shaped topological structures; the 8dB attenuation unit is in a structured formed by cascading two n-shaped topological structures; the 16dB attenuation unit is in a switched topological structure; the 2dB attenuation unit, the 0.5dB attenuation unit, the 16dB attenuation unit, the 1dB attenuation unit, the 8dB attenuation unit and the 4 dB attenuation unit are in cascade connection in sequence; the work frequency range of the attenuator is 2-18GHz; and 64 attenuation states can be realized within the attenuation range of 0.5-31.5dB by taking 0.5dB as a stepping value. The attenuator has the advantages of simple circuit topological structure, simpleness and convenience for design, low process difficulty, low inserting loss, small phase shift and high attenuation precision for various attenuation states, small standing wave ratio of the input end voltage to the output end voltage, wide working band, small circuit size, simpleness for control and convenience for use and is convenient for large-batch production by adopting a microwave singlechip integrated circuit process technology.

Description

technical field [0001] The invention relates to an electronic component used for radar, communication and guidance, in particular to a microwave and millimeter wave ultra-wideband low-phase-shift six-digit digital attenuator. Background technique [0002] Microwave and millimeter wave ultra-wideband low phase shift six-digit digital attenuator 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 ultra-wideband 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 number; 3) Total attenuation; 4) Attenuation step; 5) Attenuation accuracy; 6) Insertion loss of each attenuation state; 7) Phase shift of ea...

Claims

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Application Information

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IPC IPC(8): H03H7/03
Inventor 戴永胜陈曦陈少波王立杰郭永新盛卫星戴冰清徐利於秋杉杨健张红周聪
Owner NANJING UNIV OF SCI & TECH
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