A multilayer microstrip graphene-based circularly polarized antenna

Abstract

The application relates to the technical field of circularly polarized antennas, and particularly relates to a circularly polarized antenna based on multilayer microstrip graphene, which comprises a graphene bottom layer, a microstrip substrate, a graphene feed radiation layer and a multilayer microstrip graphene circularly polarized conversion structure; the graphene bottom layer, the microstrip substrate, the graphene feed radiation layer and the multilayer microstrip graphene circularly polarized conversion structure are stacked from bottom to top, the graphene feed radiation layer comprises a microstrip feed structure, a microstrip-to-dielectric integrated waveguide structure and a radiation structure, the multilayer microstrip graphene circularly polarized conversion structure comprises a multilayer microstrip plate and multilayer graphene; the antenna adopts microstrip feed, feeds the radiation structure through the microstrip-to-dielectric integrated waveguide structure, and finally radiates a circularly polarized signal through the multilayer microstrip graphene circularly polarized conversion structure. The antenna adopts the structure of the multilayer microstrip plate and the graphene, has the advantages of wide frequency band, wide beam, simple structure, easy integration, low weight and fast heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of circularly polarized antenna technology, and more specifically to a circularly polarized antenna based on multilayer microstrip graphene. Background Technology

[0002] With the development of radio frequency technology, antenna performance has a significant impact on communication systems. Among linearly polarized antennas, circularly polarized antennas possess unique performance characteristics. Circularly polarized antennas can effectively cope with interference from rain, fog, the ionosphere, and multipath effects on electromagnetic wave propagation. Circularly polarized antennas have found wide application in various fields, including military, navigation, and communications.

[0003] Graphene antenna technology has received much attention in recent years. As a representative of electromagnetic metamaterials, graphene has many advantages over traditional metals, such as light weight, low electrical resistance and noise, superior flexibility, and excellent heat dissipation. This invention innovatively combines multilayer microstrip, integrated waveguide, multilayer graphene, and circular polarization technologies to design a circularly polarized antenna based on multilayer microstrip graphene.

[0004] In view of the above-mentioned defects, the inventors of this invention have finally obtained this invention after a long period of research and practice. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of how to reduce the weight of the antenna, improve its heat dissipation performance, and at the same time ensure the advantages of wide bandwidth, wide beam, simple structure and easy integration. It provides a circularly polarized antenna based on multilayer microstrip graphene.

[0006] To achieve the above objectives, this invention discloses a circularly polarized antenna based on multilayer microstrip graphene, comprising, from bottom to top, a graphene bottom layer, a microstrip substrate, a graphene feed radiating layer, and a multilayer microstrip graphene circular polarization conversion structure, wherein the graphene bottom layer, the microstrip substrate, the graphene feed radiating layer, and the multilayer microstrip graphene circular polarization conversion structure are stacked together.

[0007] The microstrip substrate includes a dielectric integrated waveguide and a radiating cavity, both of which are composed of multiple metallized vias, which are formed on the microstrip substrate.

[0008] The graphene-fed radiating layer consists of a microstrip feeding structure, a microstrip-to-dielectric integrated waveguide structure, and a radiating structure. The microstrip feeding structure is a rectangular graphene structure. The microstrip-to-dielectric integrated waveguide structure is used to transform the graphene tapered microstrip line into a dielectric integrated waveguide to achieve impedance matching. The feeding signal is fed to the antenna through the microstrip feeding structure, then undergoes impedance transformation through the connected microstrip-to-dielectric integrated waveguide structure, and finally radiates the signal through the radiating structure.

[0009] The radiating structure includes a radiating patch, a radiating grounding post, and a radiating gap. The radiating gap is a blank area around the radiating patch, and the radiating grounding post is located directly below the radiating patch.

[0010] The angle between the long side of the radiating patch and the long side of the radiating cavity and the long side of the microstrip substrate is 45±10°. The radiating patch is elongated and the number of radiating grounding posts is 1 to 5.

[0011] The multilayer microstrip graphene circular polarization conversion structure is composed of alternating layers of microstrip plates and graphene. Each layer of microstrip plates and graphene has an etched region in the middle, and the area of ​​the etched region gradually increases from bottom to top. Metallized vias are provided around the etched region, which surround the etched region and penetrate the microstrip plates and graphene. The center of the etched region is aligned with the center of the radiation cavity.

[0012] Compared with existing technologies, the advantages of this invention are as follows: The antenna of this invention adopts microstrip feeding, and feeds the radiating structure through a microstrip-to-dielectric integrated waveguide structure. Finally, it radiates a circularly polarized signal through a multilayer microstrip graphene circular polarization conversion structure. Because this invention adopts a dielectric integrated waveguide, this structural form has the advantage of wide bandwidth. The signal has the advantage of wide beam after passing through the circular polarizer. It only adopts a microstrip board plus graphene structure. The weight of graphene is only one-sixth of that of copper. The structure is simple, easy to integrate, and lightweight. Graphene has excellent thermal conductivity and fast heat dissipation, making it suitable for high-power transmission signals and antenna array applications. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a circularly polarized antenna based on multilayer microstrip graphene according to the present invention.

[0014] Figure 2 This is an exploded schematic diagram of a circularly polarized antenna structure based on multilayer microstrip graphene according to the present invention.

[0015] Figure 3 This is a schematic diagram of the microstrip substrate structure of the present invention;

[0016] Figure 4 This is a schematic diagram of the graphene-fed radiation layer of the present invention;

[0017] Figure 5 This is a schematic diagram showing the overall and exploded views of the multilayer microstrip graphene circular polarization conversion structure of the present invention.

[0018] The numbers in the image represent:

[0019] 1-Graphene substrate; 2-Microstrip substrate; 201-Dielectric integrated waveguide; 202-Radiating cavity; 3-Graphene-fed radiating layer; 301-Graphene-fed structure; 302-Microstrip to dielectric integrated waveguide structure; 303-Radiating structure; 304-Radiating patch; 305-Radiating grounding post; 306-Radiating slot; 4-Multilayer microstrip graphene circular polarization conversion structure. Detailed Implementation

[0020] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0021] A circularly polarized antenna based on multilayer microstrip graphene comprises, from bottom to top, a graphene bottom layer, a microstrip substrate, a graphene feed radiating layer, and a multilayer microstrip graphene circular polarization conversion structure, wherein the graphene bottom layer, the microstrip substrate, the graphene feed radiating layer, and the multilayer microstrip graphene circular polarization conversion structure are stacked.

[0022] The microstrip substrate includes a dielectric integrated waveguide and a radiating cavity, both of which are composed of multiple metallized vias, which are formed on the microstrip substrate.

[0023] The graphene-fed radiating layer includes a microstrip feeding structure, a microstrip-to-dielectric integrated waveguide structure, and a radiating structure. The microstrip feeding structure is a rectangular graphene structure. The microstrip-to-dielectric integrated waveguide structure includes a graphene gradient microstrip line transformed into a dielectric integrated waveguide to achieve impedance matching. The feeding signal feeds the antenna through the microstrip feeding structure, then undergoes impedance transformation through the connected microstrip-to-dielectric integrated waveguide structure, and finally radiates the signal through the radiating structure.

[0024] The radiating structure includes a radiating patch, a radiating grounding post, and a radiating gap. The radiating gap is a blank area around the radiating patch, and the radiating grounding post is located directly below the radiating patch.

[0025] The angle between the long side of the radiating patch and the long side of the radiating cavity and the long side of the microstrip substrate is 45±10°. The radiating patch is elongated and the number of radiating grounding posts is 1 to 5.

[0026] The multilayer microstrip graphene circular polarization conversion structure is composed of multiple layers of microstrip plate and graphene layer stacked in a cyclic manner. Each layer of microstrip plate and graphene has an etched region in the middle, and the area of ​​the etched region gradually increases from bottom to top. Metallized vias are provided around the etched region, and the metallized vias enclose the etched region and penetrate the microstrip plate and graphene. The center of the etched region is aligned with the center of the radiation cavity.

[0027] Example 1

[0028] like Figures 1-5 As shown, it includes a graphene bottom layer 1, a microstrip substrate 2, a graphene feeding and radiating layer 3, and a multilayer microstrip graphene circular polarization conversion structure 4; the graphene bottom layer 1, the microstrip substrate 2, the graphene feeding and radiating layer 3, and the multilayer microstrip graphene circular polarization conversion structure 4 are stacked from bottom to top.

[0029] The microstrip substrate 2 is a high-frequency microstrip board, which includes multiple metallized vias. Some of the metallized vias form a dielectric integrated waveguide 201, and some of the metallized vias form a radiation cavity 202 with a rotation angle of 45°.

[0030] The graphene-fed radiating layer 3 includes a graphene-fed structure 301, a microstrip-to-dielectric integrated waveguide structure 302, and a radiating structure 303.

[0031] The graphene feeding structure 301 of the graphene feeding radiation layer 3 is a rectangular graphene feeding structure with uniform thickness, and the microstrip to dielectric integrated waveguide structure 302 includes a graphene gradient microstrip line to a dielectric integrated waveguide to complete impedance matching.

[0032] The radiation structure 303 of the graphene-fed radiation layer 3 includes a radiation patch 304, a radiation grounding post 305, and a radiation slot 306. The radiation patch 304 is rectangular in shape and rotated at an angle of 43°. There are two radiation grounding posts 305, and the radiation slot 306 is rectangular in shape.

[0033] The multilayer microstrip graphene circular polarization conversion structure 4 can be formed by multiple cyclic stacks of a microstrip plate and a graphene layer. The etchable area in the middle region of each microstrip plate consists of two straight lines and two arcs, and the etched area of ​​each layer increases from bottom to top. Metallized vias are made near the etched area of ​​each microstrip plate. The etched area of ​​each graphene layer in the multilayer microstrip graphene circular polarization conversion structure 4 consists of two straight lines and two arcs, and the etched area of ​​each layer increases from bottom to top.

[0034] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A circularly polarized antenna based on multilayer microstrip graphene, characterized in that, The structure, from bottom to top, includes a graphene base layer, a microstrip substrate, a graphene-fed radiating layer, and a multilayer microstrip graphene circular polarization conversion structure. These components are stacked together. The graphene-fed radiating layer comprises a microstrip feeding structure, a microstrip-to-dielectric integrated waveguide structure, and a radiating structure. The multilayer microstrip graphene circular polarization conversion structure is formed by alternating layers of microstrip plates and graphene. Each layer of microstrip plates and graphene has an etched region in the middle, with the area of ​​the etched region gradually increasing from bottom to top. Metallized vias surround the etched region, penetrating the microstrip plates and graphene. The center of the etched region is aligned with the center of the radiating cavity.

2. The circularly polarized antenna based on multilayer microstrip graphene as described in claim 1, characterized in that, The microstrip substrate includes a dielectric integrated waveguide and a radiating cavity, both of which are surrounded by a plurality of metallized vias, which are formed on the microstrip substrate.

3. A circularly polarized antenna based on multilayer microstrip graphene as described in claim 1, characterized in that, The microstrip feeding structure is a rectangular graphene structure. The microstrip-to-dielectric integrated waveguide structure is used to transform the graphene gradient microstrip line into a dielectric integrated waveguide to achieve impedance matching. The feeding signal is fed to the antenna through the microstrip feeding structure, and then the impedance is transformed through the connected microstrip-to-dielectric integrated waveguide structure. Finally, the signal is radiated through the radiating structure.

4. A circularly polarized antenna based on multilayer microstrip graphene as described in claim 3, characterized in that, The radiating structure includes a radiating patch, a radiating grounding post, and a radiating gap. The radiating gap is a blank area around the radiating patch, and the radiating grounding post is located directly below the radiating patch.

5. A circularly polarized antenna based on multilayer microstrip graphene as described in claim 4, characterized in that, The angle between the long side of the radiating patch and the long side of the radiating cavity and the long side of the microstrip substrate is 45±10°. The radiating patch is elongated and the number of radiating grounding posts is 1 to 5.

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