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Straight-through waveguide microstrip transition structure based on wide conduction band

A transitional structure, straight-through technology, applied in waveguide-type devices, circuits, connecting devices, etc., can solve the problems of long transition part length, unfavorable miniaturization design, large discontinuity, etc., to reduce the number of steps and facilitate the Low insertion loss design, the effect of shortening the transition structure

Active Publication Date: 2022-05-31
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the opposite ridge metal fins on both sides of the dielectric substrate will rotate the electric field of the TE10 mode of the metal waveguide by 90 degrees, resulting in a large field discontinuity, which is not conducive to matching; at the same time, the length of the gradual transition part is longer Long, not conducive to the miniaturization design of the system
In actual engineering, it is also necessary to add DC blocking, which introduces a large DC blocking loss and has resonance problems

Method used

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  • Straight-through waveguide microstrip transition structure based on wide conduction band
  • Straight-through waveguide microstrip transition structure based on wide conduction band
  • Straight-through waveguide microstrip transition structure based on wide conduction band

Examples

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Embodiment 1

[0019] figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the present invention, figure 2It is a top view of the structure of the present invention, including a waveguide 1 , a dielectric substrate 2 covering a wide guide band, and a microstrip line 3 . The waveguide is composed of standard waveguide 10, height-reduced waveguide 11, height-reduced and width waveguide 12, width-reduced waveguide 13, confinement cavity 14, and microstrip shielding cavity 15, which are connected in cascade from left to right; the standard The waveguide 10 can be realized by using various specifications of rectangular waveguides or other types of waveguides. For example, for the transition from a W-band waveguide to a microstrip, the standard waveguide 10 adopts a WR-10 standard rectangular waveguide, and its main mode frequency range is 75GHz ~110GHz, with a width of 2.54mm and a height of 1.27mm; the height-reducing waveguide 11 is implemented in a single-s...

Embodiment 2

[0023] In this embodiment, the metal wide conduction strip 21 is transformed from an isosceles trapezoid to any other shape, while ensuring that the width is always less than or equal to the dielectric substrate 20, the width on the left is close to or even exceeds the standard waveguide 10, and the width on the right is close to matching the microstrip line 31. The width of the metal conduction band, and other parts of the structure are the same as those in Embodiment 1, and the functions of the present invention can still be realized.

Embodiment 3

[0025] In this embodiment, the matching microstrip line 31 metal conduction strip is changed into a width gradient form, and other parts of the structure are the same as the first embodiment, and the functions of the present invention can still be realized.

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Abstract

The invention discloses a straight-through type waveguide microstrip transition structure based on a wide conduction band. The straight-through type waveguide microstrip transition structure comprises a waveguide, a dielectric substrate covered with the wide conduction band and a microstrip line. The waveguide is formed by clinging and cascading a standard waveguide, a height-reducing waveguide, a height-reducing width-reducing waveguide, a width-reducing waveguide, a constraint cavity and a micro-strip shielding cavity from left to right, the dielectric substrate is positioned on the lower wall of the width-reducing waveguide and is tightly attached to the lower wall, and the wide conduction band is tightly covered above the dielectric substrate. The height-reducing waveguide and the height-reducing and width-reducing waveguide are used for promoting an electric field to be concentrated between the wide conduction band and the lower walls of the height-reducing waveguide and the width-reducing waveguide, the electric field is gradually concentrated into a microstrip line medium, and the height-reducing and width-reducing waveguide and the width-reducing waveguide are used for inhibiting a high-order mode possibly appearing at a microstrip line port. And finally, a straight-through waveguide microstrip transition structure which is free of a blocking problem, free of resonance, low in reflection and low in loss is formed. Meanwhile, the filter is compact in structure, small in size, easy to process and suitable for popularization and application in microwave integrated circuits.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter transmission, and relates to a straight-through waveguide microstrip transition structure. Background technique [0002] With the rapid development of modern microwave and millimeter wave circuit systems, the system puts forward more complex functional requirements and higher electrical performance indicators for each component. In earlier microwave and millimeter wave circuit systems, most transmission lines and passive circuit structures were based on metal waveguides. Among them, the rectangular waveguide has been widely used in the microwave frequency band of 0.3-300GHz and millimeter-wave radar, electronic information countermeasures, microwave remote sensing and communication. The structure has small conductor loss, large power capacity, no radiation loss, and high Q value. , simple structure, convenient for mass production, but processing and debugging are more complicated...

Claims

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Application Information

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IPC IPC(8): H01P5/107
CPCH01P5/107Y02D30/70
Inventor 张永鸿张宇驰赵明华刘宸宇童凌云梁涛冯涛樊勇
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA