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Double-layer microstrip multi-channel power splitter based on graphene film

A technology of graphene film and power divider, which is applied in the direction of circuits, waveguide devices, connecting devices, etc., can solve the problems of unsuitable planar structure integration, affecting the performance of power dividers, and not suitable for miniaturization, etc., to achieve shortened processing Time required, high reliability, effects of avoiding adverse effects

Active Publication Date: 2019-06-21
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first is to use a binary tree structure for multi-channel power division. This structure is easy to adjust the number of output ports and can achieve high isolation in a planar structure. However, as the number of channels increases, its size will become larger and larger. suitable for miniaturization
The second type is the cavity multi-channel power splitter. The cavity multi-channel power splitter is favored for its excellent characteristics such as low loss, high power capacity and wide transmission bandwidth, but it is too large and the processing cost is relatively high. High, not suitable for the integration of planar structures and other shortcomings, which also has certain limitations in its application
The power divider has 5 circuits, less circuits, and the isolation resistor is a lumped resistor. At this time, there is no difficulty in welding the lumped resistor, but when the number of circuits increases, it will reach nine or more. Too much resistance welding is time-consuming and labor-intensive, and the lumped resistance will produce certain parasitic effects at high frequencies, which will affect the performance of the power divider

Method used

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  • Double-layer microstrip multi-channel power splitter based on graphene film
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  • Double-layer microstrip multi-channel power splitter based on graphene film

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Experimental program
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Effect test

Embodiment 1

[0023] Power splitter is an important microwave passive device, which is widely used in microwave equipment such as phased array radar, antenna feeder system and power amplifier. At present, the microwave passive devices used in the radio frequency front end of the wireless communication system are constantly developing towards miniaturization and high integration. Miniaturization and ease of integration have become an important indicator for measuring the performance of microwave devices. The binary tree structure is often used in power dividers, but the size of the tree structure will become larger and larger as the number of power splitters increases, which is not suitable for miniaturization. At present, the isolation resistors of planar power dividers mostly adopt the method of welding lumped resistors In 2013, the new planar five-way power splitter proposed by Wang Huanzhu and others adopted a double-layer microstrip structure to realize direct one-to-five splitting, whic...

Embodiment 2

[0027] The overall structure of the double-layer microstrip multi-channel power divider based on graphene film is the same as that of embodiment 1. The upper dielectric substrate 11 and the lower dielectric substrate 12 in this example all adopt high-frequency printed circuit board Rogers4350B, and the dielectric constant of Rogers4350B is ε r =3.48, the characteristic impedance of the quarter-wavelength transmission line of the upper microstrip 14 is N is the number of power splitters. As the number of channels increases, the characteristic impedance of the quarter-wavelength transmission line will increase. When the number of channels is large, such as nine channels, the upper microstrip 14 The characteristic impedance of the wavelength transmission line is 150 ohms. At this time, the width of the microstrip line is 0.1-0.3mm. Considering that the line width of the high-impedance microstrip line is small in the actual processing of the product, the processing accuracy is hig...

Embodiment 3

[0030] The overall structure of the double-layer microstrip multi-way power splitter based on graphene film is the same as embodiment 1-2, see image 3 , Figure 4 , the lower surface of the lower substrate 12 is a lower microstrip 15 and a circular saw-tooth structure 18, the lower microstrip 15 includes N half-wavelength transmission lines scattered in distribution, and each half-wavelength transmission line part adopts a bent line structure, which is convenient for small In this example, the lower microstrip half-wavelength transmission line has 5 sections, which are generally hook-shaped. Starting from the concentrated end of the lower microstrip, the length of the first section accounts for 46% of the total length of the half-wavelength transmission line, and the length of the second section accounts for half-wavelength transmission line. 7% of the total length, the length of the third section accounts for 25% of the total length of the half-wavelength transmission line, ...

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Abstract

The invention discloses a double layer micro-strip multi-channel power divider based on a graphene thin film, which mainly solves the problems that a micro-strip multi-channel power divider in the prior art needs to weld a lumped resistor, the welding is tedious, the efficiency is low, and the integration is difficult and so on. The double layer micro-strip multi-channel power divider based on the graphene thin film comprises a double layer dielectric substrate, an input port, N output ports, and micro-strip lines in scattering distribution on the upper surface of an upper substrate and the lower surface of a lower substrate; a metal ground plane is located between the two layers of substrates; a metalized through hole penetrates through the ground plane to connect the upper and lower layers of micro-strips electrically and is not contacted with the metal ground plane; and a circular graphene thin film with a square resistance of 500 omega / sq is loaded on a concentrated end of the micro-strip line at the lower surface of the lower substrate. The invention adopts the circular graphene thin film to replace a traditional lumped isolation resistor, and adopts a PCB and a laser etching technology to realize once forming of the power divider, avoid the parasitic effect caused by the lumped resistor in high frequency, and realize miniaturization and high isolation of a planar multi-channel power divider, and is used for phased array radar, antenna feeder systems and other microwave communication systems.

Description

technical field [0001] The invention belongs to the technical field of electronic devices, and relates to a microwave power splitter, specifically a graphene film-based compact double-layer microstrip multi-channel power divider, which can be used for phased array radars, antenna feeder systems, and power amplifiers. equipment. Background technique [0002] Graphene is a thin film material of carbon atoms with a special two-dimensional structure, with a single atomic layer thickness. Moreover, graphene has unique electrical, thermal, and mechanical properties. In recent years, the research on the preparation method of graphene has made great progress, which makes it an important material for millimeter wave and submillimeter wave devices, and it is applied to passive microwave devices. Contribute to system integration. [0003] Power splitter is an important microwave passive device, which is widely used in microwave equipment such as phased array radar, antenna feeder sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P5/16
CPCH01P5/16
Inventor 吴边张亚辉赵雨桐樊炽张楠
Owner XIDIAN UNIV