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KR-20260062822-A - WAVEGUIDE-MICROSTRIP PLANAR TRANSITION STRUCTURE PROVIDING BROADBAND COUPLING

KR20260062822AKR 20260062822 AKR20260062822 AKR 20260062822AKR-20260062822-A

Abstract

The present disclosure relates to a broadband signal transmission method and apparatus using a waveguide-microstrip planar transition structure, and more specifically, may include the steps of receiving a signal through a waveguide, combining the signal through a planar transition structure disposed between the waveguide and a microstrip line, and transmitting the signal in a broadband through the transition structure.

Inventors

  • 유종원
  • 임영준
  • 이지훈
  • 조현정

Assignees

  • 한국과학기술원

Dates

Publication Date
20260507
Application Date
20250825
Priority Date
20241029

Claims (18)

  1. In a broadband signal transmission method using a waveguide-microstrip planar transition structure, Step of receiving a signal through a waveguide; A step of combining the signal through a planar transition structure disposed between the waveguide and the microstrip line; and A method for transmitting a broadband signal through a waveguide-microstrip planar transition structure, comprising the step of transmitting the signal in a broadband through the transition structure.
  2. In paragraph 1, The above planar transition structure is, It includes a plurality of stacked patch structures, A broadband signal transmission method through a waveguide-microstrip planar transition structure, characterized in that the above-described stacked patch structure is formed on a first layer and a second layer spaced apart from each other.
  3. In paragraph 2, The above stacked patch structure is, A broadband signal transmission method through a waveguide-microstrip planar transition structure characterized by being composed of different lengths to form different resonant frequencies.
  4. In paragraph 2 or 3, A notch structure is formed in the stacked patch of the second layer above, and A broadband signal transmission method through a waveguide-microstrip planar transition structure, characterized in that the above notch structure generates an additional resonant frequency by expanding the current path of the above stacked patch.
  5. In paragraph 1, A broadband signal transmission method through a waveguide-microstrip planar transition structure, characterized in that the waveguide is a metal waveguide of the WR-12 waveguide standard.
  6. In paragraph 1, The step of combining the signal through a planar transition structure disposed between the waveguide and the microstrip line is, A step of coupling the above transition structure to a microstrip feed horn antenna; A broadband signal transmission method through a waveguide-microstrip planar transition structure, characterized by further including the step of radiating the above signal through the microstrip feed horn antenna.
  7. In paragraph 1, A method for transmitting a broadband signal through a waveguide-microstrip planar transition structure, characterized in that the broadband signal is included in a millimeter wave frequency band in the range of approximately 60 GHz to 85 GHz.
  8. In paragraph 1, The above signal is input using the TE10 mode of the waveguide, and A broadband signal transmission method through a waveguide-microstrip planar transition structure, characterized in that the above TE10 mode transitions to the Quasi-TEM mode of the above microstrip.
  9. In a broadband signal transmission system using a waveguide-microstrip planar transition structure, At least one module and a memory for storing a broadband signal; and It includes a processor that controls signal coupling between a waveguide and a microstrip line, and The above processor is, A signal is received through the above waveguide; Combining the signal through a planar transition structure disposed between the waveguide and the microstrip line; and A broadband signal transmission system through a waveguide-microstrip planar transition structure that transmits the signal in a broadband through the above transition structure.
  10. In Paragraph 9, The above planar transition structure is, It includes a plurality of stacked patch structures, A broadband signal transmission system through a waveguide-microstrip planar transition structure, characterized in that the above-described stacked patch structure is formed on a first layer and a second layer spaced apart from each other.
  11. In Paragraph 10, The above stacked patch structure is, A broadband signal transmission system through a waveguide-microstrip planar transition structure characterized by being composed of different lengths to form different resonant frequencies.
  12. In Article 10 or Article 11, A notch structure is formed in the stacked patch of the second layer above, and A broadband signal transmission system through a waveguide-microstrip planar transition structure, characterized in that the above notch structure generates an additional resonant frequency by expanding the current path of the above stacked patch.
  13. In Paragraph 9, A broadband signal transmission system through a waveguide-microstrip planar transition structure, characterized in that the waveguide is a metal waveguide of the WR-12 waveguide standard.
  14. In Paragraph 9, The above processor is, When combining the signal through a planar transition structure disposed between the waveguide and the microstrip line, The above transition structure is coupled to a microstrip feed horn antenna; A broadband signal transmission system through a waveguide-microstrip planar transition structure, further comprising the case where the above signal is radiated through the microstrip feed horn antenna.
  15. In Paragraph 9, A broadband signal transmission system through a waveguide-microstrip planar transition structure, characterized in that the above broadband signal is included in a millimeter wave frequency band in the range of approximately 60 GHz to 85 GHz.
  16. In Paragraph 9, The above processor is, When combining the signal through a planar transition structure disposed between the waveguide and the microstrip line, The above transition structure is coupled to a microstrip feed horn antenna; A broadband signal transmission system through a waveguide-microstrip planar transition structure, further comprising the case where the above signal is radiated through the microstrip feed horn antenna.
  17. In Paragraph 9, A broadband signal transmission system through a waveguide-microstrip planar transition structure, characterized in that the above broadband signal is included in a millimeter wave frequency band in the range of approximately 60 GHz to 85 GHz.
  18. In Paragraph 9, The above signal is input using the TE10 mode of the waveguide, and A broadband signal transmission system through a waveguide-microstrip planar transition structure, characterized in that the above TE10 mode transitions to the Quasi-TEM mode of the above microstrip.

Description

Waveguide-microstrip planar transition structure providing broadband coupling The present disclosure relates to a waveguide-microstrip planar transition structure providing broadband coupling, and more specifically, to a transition structure for broadband signal and power transmission between a waveguide and a microstrip transmission line in the millimeter wave band. With the recent increase in the need for high-speed communication technologies using the millimeter-wave band, active research is being conducted on various transmission line structures for efficient signal and power transmission. In particular, transition structures for the switching of propagation between square waveguides and microstrips are emerging as a critical technology, and there is a demand for methods to achieve wider bandwidths and lower propagation loss through this. However, conventionally, microstrip and square waveguides have primarily been used as transmission lines in the millimeter-wave band. Among existing transition structures, microstrips raise concerns regarding high propagation loss, while square waveguides, although having low propagation loss, have limitations due to their large volume, which reduces system design flexibility. Accordingly, the need for transition structures for efficient signal switching in the millimeter-wave band has recently been increasing. In other words, there is a need for improved transition structures to achieve wider bandwidths and efficient system configurations. FIG. 1 is an exemplary diagram showing the layer-by-layer structure of a planar broadband waveguide-microstrip transition structure according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a planar broadband waveguide-microstrip transition structure according to an embodiment of the present disclosure. FIG. 3 is a top view of the metal layers of the first layer and the second layer in a planar broadband waveguide-microstrip transition structure according to an embodiment of the present invention. FIG. 4 is a top view of a metal pattern of the third layer in a planar broadband waveguide-microstrip transition structure according to an embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating the mode transition process of an electromagnetic wave in a planar broadband waveguide-microstrip transition structure according to an embodiment of the present disclosure. FIG. 6 is a diagram showing different surface current paths in the resonance modes of stacked patches formed in the first layer and the second layer, respectively, in a planar broadband waveguide-microstrip transition structure according to an embodiment of the present invention. FIG. 7 is a graph showing the results of an electromagnetic simulation performed on a planar broadband waveguide-microstrip transition structure according to an embodiment of the present invention. FIG. 8a is a diagram showing a back-to-back connection of a waveguide-microstrip transition structure according to an embodiment of the present invention. FIG. 8b is a graph showing S-parameter characteristics according to the length of a transmission line according to one embodiment of the present invention. FIG. 9 is a cross-sectional view of a horn antenna system utilizing a waveguide-microstrip transition structure according to an embodiment of the present invention. Figure 10 is a graph analyzing the reflection loss performance of a microstrip-fed horn antenna according to an embodiment of the present invention. FIG. 11 is a diagram showing the H-plane radiation pattern of a microstrip-fed horn antenna according to an embodiment of the present invention. Hereinafter, embodiments of the present disclosure are described in detail with reference to the attached drawings so that those skilled in the art can easily implement them. However, the present disclosure may be embodied in various different forms and is not limited to the embodiments described herein. In describing the embodiments of the present disclosure, if it is determined that a detailed description of known configurations or functions could obscure the essence of the present disclosure, such detailed description is omitted. Additionally, parts of the drawings unrelated to the description of the present disclosure have been omitted, and similar parts are denoted by similar reference numerals. In the present disclosure, when a component is described as being “connected,” “combined,” or “joined” with another component, this may include not only a direct connection but also an indirect connection in which another component exists in between. Furthermore, when a component is described as “comprising” or “having” another component, this means that, unless specifically stated otherwise, it does not exclude the other component but may include additional components. In the present disclosure, terms such as first, second, etc. are used solely for the purpose of distinguishing one component from ano