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CN-122026044-A - Plane integrated hollow rectangular dielectric waveguide

CN122026044ACN 122026044 ACN122026044 ACN 122026044ACN-122026044-A

Abstract

The application discloses a planar integrated hollow rectangular dielectric waveguide, which relates to the field of planar integrated waveguides, and comprises an upper dielectric layer, a middle dielectric layer, a lower dielectric layer and a metal ground plane attached to the lower surface of the lower dielectric layer, wherein the upper dielectric layer, the middle dielectric layer and the lower dielectric layer are distributed from top to bottom; the air hole array is formed by arranging a plurality of rows of air holes penetrating through the upper medium layer, the middle medium layer and the lower medium layer in the left air hole area and the right air hole area. The planar integrated hollow rectangular dielectric waveguide designed by the application has the advantages of low loss, easiness in realizing integrated design and planar integration, and simple and stable structure.

Inventors

  • LI XIAOCHUN
  • SUN CHANGSHENG

Assignees

  • 上海交通大学

Dates

Publication Date
20260512
Application Date
20260317

Claims (10)

  1. 1. A planar integrated hollow rectangular dielectric waveguide, comprising: An upper medium layer (1), a middle medium layer (2) and a lower medium layer (3) which are distributed from top to bottom, a metal ground plane (4) attached to the lower surface of the lower medium layer (3), a left air hole area (5), a middle guided wave area (6) and a right air hole area (7) which are distributed from left to right; The middle guided wave region (6) is provided with an air groove (8) at the center of the middle dielectric layer (2) to form a hollow guided wave structure, and a plurality of rows of air holes (9) penetrating through the upper dielectric layer (1), the middle dielectric layer (2) and the lower dielectric layer (3) are arranged in the left air hole region (5) and the right air hole region (7) to form an air hole array (10).
  2. 2. A planar integrated hollow rectangular dielectric waveguide according to claim 1, wherein the upper dielectric layer (1), the middle dielectric layer (2) and the lower dielectric layer (3) are made of the same or different dielectric materials.
  3. 3. A planar integrated hollow rectangular dielectric waveguide according to claim 1, characterized in that the width of the air slot (8) is smaller than or equal to the width of the intermediate guided wave region (6).
  4. 4. A planar integrated hollow rectangular dielectric waveguide according to claim 1, characterized in that the air holes (9) are arranged periodically or non-periodically.
  5. 5. A planar integrated hollow rectangular dielectric waveguide according to claim 4, characterized in that the air holes (9) are round, elliptical or rectangular holes.
  6. 6. A planar integrated hollow rectangular dielectric waveguide according to claim 1, characterized in that the array of air holes (10) is used to reduce the local equivalent dielectric constants of the left (5) and right (7) air hole regions to create total internal reflection conditions in the intermediate guided wave region (6).
  7. 7. A planar integrated hollow rectangular dielectric waveguide according to claim 1, characterized in that the metal ground plane (4) is used for co-grounding integration, electromagnetic shielding, mechanical support and heat dissipation of the planar integrated hollow rectangular dielectric waveguide.
  8. 8. A planar integrated hollow rectangular dielectric waveguide according to claim 1, characterized in that the thickness of the upper dielectric layer (1) and the thickness of the lower dielectric layer (3) are equal, and the thickness of the middle dielectric layer (2) is smaller than the thickness of the upper dielectric layer (1).
  9. 9. The planar integrated hollow rectangular dielectric waveguide of claim 1, wherein the operating frequency bands of the planar integrated hollow rectangular dielectric waveguide are millimeter wave frequency bands and terahertz frequency bands.
  10. 10. The planar integrated hollow rectangular dielectric waveguide of claim 1, wherein the planar integrated hollow rectangular dielectric waveguide is fabricated using a printed circuit board process or a planar integrated circuit process.

Description

Plane integrated hollow rectangular dielectric waveguide Technical Field The application relates to the field of planar integrated waveguides, in particular to a planar integrated hollow rectangular dielectric waveguide. Background In the existing terahertz dielectric waveguide, the discrete solid rectangular dielectric waveguide has the problems of simple structure and easy processing, but high dielectric loss, large attenuation constant and difficult direct integration into a planar circuit board. In order to enhance the planar integration capability, it is studied to construct air hole arrays on both sides of a solid rectangular dielectric waveguide, however, due to the lack of a metal ground plane, the structure has limited planar integration, insufficient mechanical strength, poor heat dissipation performance and incapacity of realizing electromagnetic shielding. In order to further enhance the planar integration capability, a metal ground plane is introduced below the structure with the air hole array to form a substrate integrated mirror image dielectric waveguide (SIIG), and the metal ground plane can be grounded with other circuits, but SIIG still has a solid waveguide channel, so that the problems of high dielectric loss and large attenuation constant still exist. On the basis of SIIG structures, the substrate integrated non-radiative dielectric waveguide (SINRD) formed by introducing metal planes on the upper surface can realize bidirectional electromagnetic shielding, but the introduction of additional metal planes increases conductor loss, resulting in larger attenuation constant. In recent years, a hollow rectangular dielectric waveguide has been studied and proposed to be of a multi-layer structure, and a discrete hollow dielectric waveguide is formed by arranging air grooves in a medium layer, so that the hollow rectangular dielectric waveguide has a smaller attenuation constant, but the problem that planar integration is difficult to realize is still not solved by the structure. Disclosure of Invention The application aims to provide a planar integrated hollow rectangular dielectric waveguide which has the advantages of low loss, easiness in realizing integrated design and planar integration and simple and stable structure. In order to achieve the above object, the present application provides the following solutions: in a first aspect, the present application provides a planar integrated hollow rectangular dielectric waveguide comprising: an upper dielectric layer 1, a middle dielectric layer 2, a lower dielectric layer 3 and a metal ground plane 4 attached to the lower surface of the lower dielectric layer 3, which are distributed from top to bottom, a left air hole area 5, a middle guided wave area 6 and a right air hole area 7, which are distributed from left to right; The middle guided wave region 6 is provided with an air groove 8 at the center of the middle dielectric layer 2 to form a hollow guided wave structure, and a plurality of rows of air holes 9 penetrating through the upper dielectric layer 1, the middle dielectric layer 2 and the lower dielectric layer 3 are arranged in the left air hole region 5 and the right air hole region 7 to form an air hole array 10. Optionally, the upper dielectric layer 1, the middle dielectric layer 2 and the lower dielectric layer 3 are made of the same or different dielectric materials. Optionally, the width of the air slot 8 is less than or equal to the width of the intermediate guided wave region 6. Optionally, the air holes 9 are arranged periodically or aperiodically. Optionally, the air hole 9 is a round hole, an elliptical hole or a rectangular hole. Optionally, the air hole array 10 is used to reduce the local equivalent dielectric constants of the left 5 and right 7 air hole regions to create total internal reflection conditions in the intermediate guided wave region 6. Optionally, the metal ground plane 4 is used for realizing common ground integration, electromagnetic shielding, mechanical support and heat dissipation of the planar integrated hollow rectangular dielectric waveguide. Optionally, the thicknesses of the upper dielectric layer 1 and the lower dielectric layer 3 are equal, and the thickness of the middle dielectric layer 2 is smaller than the thickness of the upper dielectric layer 1. Optionally, the working frequency band of the planar integrated hollow rectangular dielectric waveguide is a millimeter wave frequency band and a terahertz frequency band. Alternatively, the planar integrated hollow rectangular dielectric waveguide is fabricated using a printed circuit board process or a planar integrated circuit process. According to the specific embodiment provided by the application, the application discloses the following technical effects: The application provides a plane integrated hollow rectangular dielectric waveguide, which is characterized in that an air groove 8 is arranged in the center of a middle dielectric laye