WO2023138519A1

WO2023138519A1 - Folded waveguide resonator antenna and electronic device

Info

Publication number: WO2023138519A1
Application number: PCT/CN2023/072265
Authority: WO
Inventors: 董运峰
Original assignee: 维沃移动通信有限公司
Priority date: 2022-01-21
Filing date: 2023-01-16
Publication date: 2023-07-27
Also published as: CN114300854A; CN114300854B

Abstract

The present application provides a folded waveguide resonator antenna and an electronic device. The folded waveguide resonator antenna comprises: a housing having a folded waveguide resonator and a metal partition plate, the housing being a right-angled triangular prism consisting of three side surfaces, and an upper surface and a lower surface which are parallel to each other; the metal partition plate is disposed inside the folded waveguide resonator, the metal partition plate is fixedly connected to at least one side surface of the housing, a slotting gap is provided between the metal partition plate and at least one side surface of the housing, and the metal partition plate divides the folded waveguide resonator into a first cavity and a second cavity; a slot is provided between at least one side surface of the housing and the upper surface and the lower surface, or a slot is provided in any surface of the housing.

Description

Folded waveguide resonator antennas and electronics

Cross References to Related Applications

This application claims priority to Chinese Patent Application 202210072632.3 filed in China on January 21, 2022, the entire contents of which are hereby incorporated by reference.

technical field

The application belongs to the technical field of antennas, and in particular relates to a folded waveguide resonant cavity antenna and electronic equipment.

Background technique

Waveguide Cavity Resonator (WCR) is a commonly used passive radio frequency device, which has the advantages of low loss, high quality factor and high power capacity.

The wavelength of the main mode of the resonant cavity that can be excited by the traditional WCR is related to the side length of the WCR, which leads to the fact that the traditional WCR is usually designed to have a larger volume. Generally speaking, the volume of antennas with waveguide resonators is larger than the volume of antenna devices such as patch antennas, inverted-F antennas (Inverted-F Antenna, IFA), planar inverted-F antennas (Planar Inverted-F Antenna, PIFA) and metal frame antennas in electronic equipment. In this way, the above-mentioned antenna equipped with a waveguide resonator needs to occupy a lot of space in the electronic device, which increases the stacking volume of the whole electronic device.

Contents of the invention

The purpose of the embodiments of the present application is to provide a folded waveguide resonator antenna and electronic equipment, which can solve the technical problem of the folded waveguide resonator antenna having a large volume.

In order to solve the above-mentioned technical problems, the application is implemented as follows:

In the first aspect, an embodiment of the present application provides a folded waveguide resonator antenna, which includes a housing with a folded waveguide resonator and a metal partition, the housing is a right-angled triangular prism composed of three side surfaces, an upper surface and a lower surface parallel to each other;

The metal partition is arranged inside the folded waveguide resonant cavity, and the metal partition is connected with the housing At least one side surface of the housing is fixedly connected, there is a slotted gap between the metal partition and at least one side surface of the housing, and the metal partition separates the folded waveguide resonant cavity into a first cavity and a second cavity;

There is a slit between at least one side surface of the casing and the upper surface and the lower surface, or a slit is provided on any surface of the casing.

In a second aspect, an embodiment of the present application provides an electronic device, including the folded waveguide resonator antenna as described in the first aspect.

In the embodiment of the present application, a metal partition is provided in the housing with the folded waveguide resonator, and the metal partition divides the folded waveguide resonator into a first cavity and a second cavity, and when the antenna of the folded waveguide resonator generates electromagnetic waves, the electromagnetic waves are three-dimensionally flipped inside the folded waveguide resonator. In this way, the folded waveguide resonator antenna can still work normally while reducing its volume, thereby reducing the occupied space of the folded waveguide resonator antenna in the electronic device, and reducing the stacking volume of the entire electronic device.

Description of drawings

FIG. 1 is one of the structural schematic diagrams of the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 2a is the second structural schematic diagram of the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 2b is the third structural schematic diagram of the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 2c is the fourth structural schematic diagram of the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 2d is the fifth structural schematic diagram of the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 2e is the sixth structural schematic diagram of the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 3 is a cross-sectional view of a folded waveguide resonator provided by an embodiment of the present application;

Fig. 4 is one of the structural schematic diagrams of the folded waveguide resonator provided by the embodiment of the present application;

Fig. 5 is the second structural schematic diagram of the folded waveguide resonator provided by the embodiment of the present application;

Fig. 6 is one of the top views of the folded waveguide resonator provided by the embodiment of the present application;

Fig. 7 is the second top view of the folded waveguide resonator provided by the embodiment of the present application;

Fig. 8 is the third structural schematic diagram of the folded waveguide resonator provided by the embodiment of the present application;

Fig. 9 is the third top view of the folded waveguide resonator provided by the embodiment of the present application;

Fig. 10 is the fourth structural schematic diagram of the folded waveguide resonator provided by the embodiment of the present application;

Fig. 11 is the fourth top view of the folded waveguide resonator provided by the embodiment of the present application;

Fig. 12(a) is the seventh structural schematic diagram of the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 12(b) is the eighth structural schematic diagram of the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 12(c) is the ninth structural schematic diagram of the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 13 is a schematic diagram of the radiation area of the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 14 is a comparison diagram of radiation effects corresponding to different slot widths in the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 15 is the fifth structural diagram of the folded waveguide resonator in the folded waveguide resonator antenna provided by the embodiment of the present application;

Fig. 16 is a schematic cross-sectional structure diagram of a folded waveguide resonator in a folded waveguide resonator antenna provided by an embodiment of the present application;

Fig. 17 is the tenth structural schematic diagram of the folded waveguide resonator provided by the embodiment of the present application;

Fig. 18 is one of the structural schematic diagrams of the electronic device provided by the embodiment of the present application;

FIG. 19 is a second schematic structural diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It is to be understood that the data so used can be interchanged under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

Please refer to FIG. 1 . FIG. 1 is one of the structural schematic diagrams of the folded waveguide resonator antenna provided by the embodiment of the present application. As shown in Figure 1, the folded waveguide resonator antenna includes a housing with a folded waveguide resonator 10 and a metal partition 20, the housing is a right-angled triangular prism composed of three side surfaces, an upper surface 30 and a lower surface 40 parallel to each other;

The metal partition 20 is arranged inside the folded waveguide resonant cavity 10, and the metal partition 20 is connected with at least One side surface is fixedly connected, there is a slotted gap 80 between the metal partition 20 and at least one side surface of the housing, and the metal partition 20 separates the folded waveguide resonant cavity 10 into a first cavity 11 and a second cavity 12;

There is a slit 90 between at least one side surface of the casing and the upper surface 30 and the lower surface 40 , or the slit 90 is provided on any surface of the casing.

In this embodiment, the folded waveguide resonator antenna includes a housing with a folded waveguide resonator 10 and a metal partition 20. It should be understood that the housing is composed of a first side surface 50, a second side surface 60, a third side surface 70, an upper surface 30, and a lower surface 40. The first side surface 50, the second side surface 60, the third side surface 70, the upper surface 30, and the lower surface 40 form the folded waveguide resonator 10, and the above-mentioned side surfaces may be metal surfaces. Wherein, the Z-axis direction of the three-dimensional coordinate system shown in FIG. 1 is the up-down direction, the X-axis direction is the left-right direction, and the Y-axis direction is the front-rear direction. Based on the three-dimensional coordinate system, the first side surface 50 can be understood as the left metal surface, the second side surface 60 can be understood as the rear metal surface, the third side surface 70 can be understood as the oblique side metal surface, the upper surface 30 can be understood as the upper metal surface, and the lower surface 40 can be understood as the lower metal surface.

As shown in FIG. 1 , the metal separator 20 is arranged inside the folded waveguide resonant cavity 10, and the metal separator 20 is fixedly connected to the first side surface 50. The metal separator 20 divides the folded waveguide resonant cavity 10 into a first cavity 11 and a second cavity 12. There is a slotted gap 80 between the metal separator 20 and the second side surface 60. It should be understood that in other embodiments, the metal partition 20 may also be fixedly connected to other side surfaces. In this way, when the folded waveguide resonator 10 is excited to generate electromagnetic waves, the electric field of the electromagnetic waves forms a main mode (TE ₁₁₀ mode) between the first cavity 11 and the second cavity 12 through the slotted gap 80, thereby realizing the three-dimensional folding of the electric field.

As shown in FIG. 1 , there is a slotted gap 80 between the metal separator 20 and the second side surface 60 , there is a slotted gap 80 between the metal separator 20 and the third side surface 70 , there is a slot 90 between the second side surface 60 and the upper surface 30 and the lower surface 40 , and there is a slot 90 between the third side surface 70 and the upper surface 30 and the lower surface 40 .

It should be understood that in other embodiments, the slit 90 may also be disposed between other side surfaces and the upper surface 30 and the lower surface 40 . In this way, the electromagnetic wave inside the folded waveguide resonator 10 can radiate to the outside through the slot 90 .

In other embodiments, slots can also be provided on any surface of the housing, that is, slots can be provided on the upper surface 30, the lower surface 40, the first side surface 50, the second side surface 60 or the third side surface 70. Set the slit.

Optionally, referring to FIGS. 2a-2e, as shown in FIGS. 2a-2c, an optional implementation manner is that a slit 90 is provided between the second side surface 60 and the upper surface 30 and the lower surface 40, and a slit 90 is provided between the third side surface 70 and the upper surface 30 and the lower surface 40. In this embodiment, as shown in FIG. 2a, the second side surface 60 and the third side surface 70 can be connected; as shown in FIG. 2b, another metal surface can be provided, and the metal surface is respectively connected to the second side surface 60 and the third side surface 70; as shown in FIG. 2c, the second side surface 60 and the third side surface 70 can be set without a connection relationship. As shown in FIG. 2 d , another optional implementation is that a slit 90 is provided between the second side surface 60 and the upper surface 30 and the lower surface 40 . As shown in FIG. 2 e , another optional implementation manner is that a slit 90 is provided between the third side surface 70 and the upper surface 30 and the lower surface 40 .

It should be understood that, for a conventional waveguide resonator, its side length is equal to the wavelength corresponding to the main mode, so when the resonant frequency is low, the waveguide resonator usually has a larger external dimension. In the embodiment of the present application, after the metal spacer 20 is set in the waveguide resonator, due to the setting of the metal spacer 20, the electric field can be folded three times inside the folded waveguide resonator 10 to form a triangular folded waveguide resonator 10 (Folded Waveguide Resonator Antenna, FWRA). Compared with the traditional waveguide resonator, the volume of the folded waveguide resonator 10 provided by the embodiment of the present application is reduced by 87.5%. In addition, the thickness of the folded waveguide resonator 10 can be properly compressed, so that the total thickness of the formed folded waveguide resonator 10 remains unchanged from that of the traditional waveguide resonator.

In the embodiment of the present application, a metal partition 20 is provided in the housing with the folded waveguide resonator 10, and the metal partition 20 divides the folded waveguide resonator 10 into a first cavity 11 and a second cavity 12. When the folded waveguide resonator antenna generates electromagnetic waves, the electromagnetic waves are three-dimensionally flipped inside the folded waveguide resonator 10. In this way, the folded waveguide resonator antenna can still work normally while reducing its volume, thereby reducing the occupied space of the folded waveguide resonator antenna in the electronic device, and reducing the stacking volume of the entire electronic device.

Optionally, the ratio between the volume of the first cavity 11 and the volume of the second cavity 12 is within a preset range, and the thickness of the target cavity is greater than or equal to 3% of the side length 101 of the folded waveguide resonator cavity, and the target cavity is any one of the first cavity 11 and the second cavity 12.

For the convenience of understanding the detailed structure of the folded waveguide resonator 10, please refer to FIG. 3. As shown in FIG. surface 70 , upper surface 30 and lower surface 40 . In the structure of the folded waveguide resonator 10 shown in FIG. 3 , the metal spacer 20 is fixedly connected to the first side surface 50 , and the metal spacer 20 is arranged at half of the total thickness of the folded waveguide resonator 10 .

It should be understood that the position of the metal separator 20 can be adjusted between 30% and 70% of the total thickness of the folded waveguide resonator 10, that is, the ratio between the volume of the first cavity 11 and the volume of the second cavity 12 is between 3:7 and 7:3. In addition, in order to ensure that the folded waveguide resonator 10 can excite the main mode without affecting the performance of the folded waveguide resonator 10, the thickness of the single-layer folded waveguide resonator 10 is set to be greater than or equal to 3% of the side length 101 of the folded waveguide resonator. Wherein, the target cavity is any one of the first cavity 11 and the second cavity 12 .

Optionally, the folded waveguide resonant cavity 10 is filled with a solid dielectric material, and the solid dielectric material is connected to the three side surfaces, the upper surface 30 and the lower surface 40 of the housing.

In this embodiment, the folded waveguide resonant cavity 10 can be filled with a solid dielectric material, such as Teflon, which is connected to the three side surfaces, the upper surface 30 and the lower surface 40 of the housing to provide support for the housing.

In other embodiments, air can be filled in the folded waveguide resonator 10 or the folded waveguide resonator 10 can be set in a vacuum state. It should be understood that when the folded waveguide resonator 10 is filled with a dielectric material, the size of the folded waveguide resonator 10 can be further reduced, and the side length of the folded waveguide resonator 10 is Wherein, λ ₀ is the wavelength corresponding to the main mode of the folded waveguide resonator 10, ε _r is the dielectric constant of the dielectric material, and μ _r is the magnetic permeability of the dielectric material.

Optionally, the feed end 210 of the folded waveguide resonator 10 is disposed on the surface of the metal partition 20 , and the ground end 220 of the folded waveguide resonator 10 is disposed on the upper surface 30 or the lower surface 40 of the housing.

In this embodiment, the feeding structure of the folded waveguide resonator 10 may include a coaxial cable, a flexible circuit board, a printed circuit board or a connector based on a coaxial cable. When feeding power through the upper surface 30 or the lower surface 40 of the folded waveguide resonator 10 , the feeding end 210 is arranged on the surface of the metal separator 20 , and the grounding end 220 is arranged on the upper surface 30 or the lower surface 40 of the housing.

As shown in Figure 4, the feeding structure of the folded waveguide resonator 10 is a coaxial cable, and the feed end 210 of the folded waveguide resonator 10 is arranged on the surface of the metal partition 20, and the grounding end 220 of the folded waveguide resonator 10 is arranged on the lower surface 40 of the housing.

As shown in FIG. 5, the feeding structure of the folded waveguide resonator 10 is a flexible circuit board, and the feed end 210 of the folded waveguide resonator 10 is arranged on the surface of the metal separator 20, and the grounding end 220 of the folded waveguide resonator 10 is arranged on the upper surface 30 of the housing.

Optionally, the housing includes a first side surface 50, a second side surface 60 and a third side surface 70, and the metal partition 20 is fixedly connected to the first side surface 50;

The distance between the feed end 210 and the first side surface 50 is greater than or equal to 6% of the side length 101 of the folded waveguide resonator and less than or equal to 11% of the side length of the folded waveguide resonator 10, and the distance between the feed end 210 and the end 60 of the metal separator 20 close to the second side surface is less than or equal to 50% of the side length 101 of the folded waveguide resonator; or,

The distance between the feed end 210 and the center line of the metal separator 20 is greater than or equal to 18.5% of the side length 101 of the folded waveguide resonator and less than or equal to 30% of the side length 101 of the folded waveguide resonator, and the distance between the feed end 210 and the end of the metal separator 20 close to the third side surface 70 is less than or equal to 21% of the side length 101 of the folded waveguide resonator.

In order to better excite the main mode of the folded waveguide resonator 10 and avoid resonance failure, the distance between the feeding end 210 and the first side surface 50 and the distance between the feeding end 210 and the end of the metal separator 20 close to the second side surface 60 need to be set. As shown in FIG. 6, when feeding is performed through the upper surface 30 or the lower surface 40 of the folded waveguide resonator 10, _d ₁₁ in FIG. 6 is the distance between the feed end 210 and the first side surface 50, and d ₁₂ in FIG. 11% of 01, d ₁₂ is less than or equal to 50% of the side length 101 of the folded waveguide resonant cavity.

Another optional implementation manner is to set the distance between the feeding end 210 and the center line of the metal partition 20 , and the distance between the feeding end 210 and the end of the metal partition 20 close to the third side surface 70 . As shown in FIG. 7, when feeding is performed through the upper surface 30 or the lower surface 40 of the folded waveguide resonator 10, d ₂₁ in FIG. 7 is the distance between the feeding end 210 and the center line of the metal partition 20, and d ₂₂ in FIG. 30% of the side length 101 of the resonant cavity, _{d 22} _is less than or equal to 21% of the side length 101 of the folded waveguide resonant cavity.

Optionally, the housing includes a first side surface 50, a second side surface 60 and a third side surface 70, and the metal The separator 20 is fixedly connected to the first side surface 50;

The ground end 220 of the folded waveguide resonator 10 is arranged on the second side surface 60, the feeding end 210 of the folded waveguide resonator 10 is arranged on the end of the metal separator 20 close to the second side surface 60, and the distance between the feeding end 210 and the first side surface 50 is greater than or equal to 6% of the side length 101 of the folded waveguide resonator, and less than or equal to 12% of the side length 101 of the folded waveguide resonator.

In this embodiment, when the power is fed through the second side surface 60 of the folded waveguide resonator 10 , the feeding end 210 is set at the end of the metal separator 20 close to the second side surface 60 , and the grounding end 220 is set at the second side surface 60 .

As shown in FIG. 8, the feeding structure of the folded waveguide resonator 10 is a coaxial cable, and the feed end 210 of the folded waveguide resonator 10 is arranged on the surface of the metal partition 20, and the grounding end 220 of the folded waveguide resonator 10 is arranged on the second side surface 60 of the housing.

In order to better excite the main mode of the folded waveguide resonator 10 and avoid resonance failure, the distance between the feeding end 210 and the first side surface 50 needs to be set. As shown in FIG. 9, when feeding is performed through the second side surface 60 of the folded waveguide resonator 10, _d3 in FIG. 9 is the distance between the feeding end 210 and the first side surface 50, and _d3 is greater than or equal to 6% of the side length 101 of the folded waveguide resonator cavity and less than or equal to 12% of the side length 101 of the folded waveguide resonator cavity.

Optionally, the ground end 220 of the folded waveguide resonator 10 is disposed on the third side surface 70, the feed end 210 of the folded waveguide resonator 10 is disposed at one end of the partition near the third side surface 70, and the distance between the feed end 210 and the centerline of the metal partition 20 is greater than or equal to 25% of the side length 101 of the folded waveguide resonator and less than or equal to 35% of the side length 101 of the folded waveguide resonator.

In this embodiment, when the power is fed through the third side surface 70 of the folded waveguide resonator 10 , the feeding end 210 is set at the end of the metal separator 20 close to the third side surface 70 , and the grounding end 220 is set at the third side surface 70 .

As shown in FIG. 10 , the feeding structure of the folded waveguide resonator 10 is a flexible circuit board, and the feed end 210 of the folded waveguide resonator 10 is arranged on the surface of the metal separator 20, and the grounding end 220 of the folded waveguide resonator 10 is arranged on the third side surface 70 of the casing.

In order to better excite the main mode of the folded waveguide resonator 10 and avoid resonance failure, the distance between the feeding end 210 and the first side surface 50 needs to be set. As shown in FIG. 11, when feeding is performed through the third side surface 70 of the folded waveguide resonator 10, _d4 in FIG. 11 is the distance between the feeding end 210 and the metal separator 20. The distance between the center lines, d ₄ , is greater than or equal to 25% of the side length 101 of the folded waveguide resonator and less than or equal to 35% of the side length 101 of the folded waveguide resonator.

Optionally, the folded waveguide resonator antenna further includes a connecting piece 100;

The metal partition 20 is fixedly connected to at least one side surface of the casing through the connector 100, there is a slotted gap 80 between the metal partition 20 and the side surface except at least one side surface in the casing, and there is a slit 90 between at least one side surface and the upper surface 30 and the lower surface 40, or a slit 90 is provided on any surface of the casing.

In this embodiment, the folded waveguide resonator antenna also includes a connector 100. For ease of understanding, please refer to FIG. 12(a). As shown in FIG.

As shown in FIG. 12( b ), the metal separator 20 is connected to the third side surface 70 through a connector 100 , there is a slotted gap 80 between the third side surface 70 and the metal separator 20 , and there is a slot 90 between the third side surface 70 and the upper surface 30 and the lower surface 40 .

As shown in FIG. 12( c ), the metal separator 20 is connected to the second side surface 60 and the third side surface 70 through a connector 100 , there is a slotted gap 80 between the second side surface 60 and the metal separator 20 , there is a slotted gap 80 between the third side surface 70 and the metal separator 20 , there is a slot 90 between the second side surface 60 and the upper surface 30 and the lower surface 40 , and there is a slot 90 between the third side surface 70 and the upper surface 30 and the lower surface 40 .

In other embodiments, the metal partition 20 may also be connected to other side surfaces of the casing through the connecting piece 100 , the above is only an example.

In this embodiment, by adding a connection structure between the metal partition 20 and the side surface of the housing, additional support can be provided for the metal partition 20 without affecting the overall efficiency of the folded waveguide resonator antenna.

Optionally, the width of the slot 90 is greater than or equal to 35% of the side length 101 of the folded waveguide resonator, and the operating frequency of the folded waveguide resonator 10 is greater than or equal to 80% of the resonant frequency of the resonant cavity 10 and less than or equal to 120% of the resonant frequency of the resonant cavity 10.

Please refer to FIG. 13 . FIG. 13 is a schematic diagram of the radiation area of the folded waveguide resonator antenna provided by the embodiment of the present application. It should be appreciated that increasing the area and number of slots 90 of the folded waveguide resonator antenna can improve High overall efficiency of folded waveguide resonator antennas. When the width of the slit 90 is greater than or equal to 35% of the side length 101 of the folded waveguide resonator, the area of the slit 90 of the folded waveguide resonator antenna can be adjusted to adjust the operating frequency of the folded waveguide resonator 10, so that the operating frequency of the folded waveguide resonator 10 is greater than or equal to 80% of the resonant frequency of the resonant cavity 10, and less than or equal to 120% of the resonant frequency of the resonant cavity 10.

When the folded waveguide resonator antenna adopts the radiation form of slits 90 on a single metal surface, the radiation area should be selected as far as possible in a strong electric field and ensure a large slit area. When the folded waveguide resonator antenna adopts the radiation form of the upper and lower or multiple metal surfaces with slits 90 at the same time, the overall efficiency of the folded waveguide resonator antenna is higher than that of a single metal surface with slits 90 .

Please refer to FIG. 14 , as shown in FIG. 14 , as the radiation area in the folded waveguide resonator antenna increases, the resonant frequency required for the folded waveguide resonator antenna to achieve the overall efficiency of the antenna becomes lower. By adjusting the width of the slit 90, the working frequency of the folded waveguide resonator 10 can be adjusted in the range of 80% to 120%, without affecting the overall efficiency of the folded waveguide resonator antenna.

Optionally, the folded waveguide resonator antenna includes a first conductor layer 110, a first dielectric layer 120, a second conductor layer 130, a second dielectric layer 140, and a third conductor layer 150 stacked in sequence; wherein, the first dielectric layer 120 is provided with a plurality of first conductive holes 1201, one end of the first conductive hole 1201 is electrically connected to the first conductive layer 110, and the other end is connected to the second conductive layer 130, and the second dielectric layer 140 is provided with a plurality of second conductive holes 1401, and the second conductive hole 14 One end of 01 is electrically connected to the second conductor layer 130, and the other end is connected to the third conductor layer 150. The first conductor layer 110, a plurality of first conductive holes 1201, a plurality of second conductive holes 1401 and the third conductor layer 150 form a casing, and part of the conductor area of the second conductor layer 130 forms a metal separator 20.

Please refer to Fig. 15 and Fig. 16, the above folded waveguide resonator antenna can be realized by using a multi-layer circuit board or low temperature co-fired ceramic (Low Temperature Co-fired Ceramic) structure. Wherein, the first conductor layer 110, the second conductor layer 130 and the third conductor layer 150 are conductive layers of a multilayer circuit board, and the above-mentioned first dielectric layer 120 and second dielectric layer 140 are nonconductive dielectric layers of a multilayer circuit board. In the above-mentioned second conductor layer 130 , except for the metal spacer 20 , at least other conductor regions are used to connect the plurality of second conductive holes 1401 to the plurality of second conductive holes 1401 . In this way, the middle area enclosed by the plurality of first conductive holes 1201 , the plurality of second conductive holes 1401 and the third conductor layer 150 can be understood as the folded waveguide resonant cavity 10 .

Optionally, the above-mentioned multilayer circuit board may be a flexible circuit board or a printed circuit board.

Further, in the embodiment of this application, it can be realized by adding additional metal wires and conductive holes feed. Specifically, it is shown in Figure 17. As shown in FIG. 17 , the conductive hole is provided between the second conductor layer 130 and the first conductor layer 110 to be electrically connected to the metal separator 20 , and finally the power feeding is realized by using a feeding structure composed of a coaxial cable or a flexible circuit board.

In the embodiment of the present application, the folded waveguide resonant cavity antenna can be obtained by using low-cost printed circuit board technology, which has high reliability and is convenient for industrial production and application.

An embodiment of the present application further provides an electronic device, and the electronic device includes the folded waveguide resonator antenna provided in the foregoing embodiment. Wherein, the specific implementation manner of the folded waveguide resonator antenna can refer to the above description, and can achieve the same technical effect. To avoid repetition, details are not repeated here.

Optionally, the electronic device includes a metal surface, and the metal surface of the electronic device is set as any surface of the casing.

In this embodiment, as shown in FIG. 18 , when the folded waveguide resonator antenna is arranged at the corner of the metal frame of the electronic device, the metal surface of the electronic device can be set as any side surface of the housing, thereby omitting the corresponding metal surface of the folded waveguide resonator 10 , and making full use of the existing metal surface of the electronic device to form a radiation area and provide support for the metal partition 20.

It should be understood that FIG. 18 is only an example of disposing the metal surface of the electronic device on any side surface of the casing.

In other embodiments, the metal surface of the electronic device can also be set as the upper surface 30 or the lower surface 40 of the casing.

Optionally, the electronic device includes a non-metallic surface, and the non-metallic surface of the electronic device is set as any surface of the casing.

In this embodiment, as shown in FIG. 19 , when the radiation area of the folded waveguide resonator antenna is located on the upper metal surface of the folded waveguide resonator antenna, the upper metal surface of the folded waveguide resonator antenna can be directly removed and the folded waveguide resonator antenna can be pasted on the non-metal surface of the electronic device, and the non-metal surface of the electronic device can be set as the upper surface 30 of the housing.

Furthermore, a dielectric material can be filled inside the folded waveguide resonator 10 to further reduce the volume of the folded waveguide resonator antenna and improve the stability of the folded waveguide resonator antenna.

In other embodiments, the non-metallic surface of the electronic device can also be set as the lower surface 40 , the first side surface 50 , the second side surface 60 or the third side surface 70 of the casing.

In the embodiment of the present application, the above-mentioned electronic equipment can be a computer (Computer), a mobile phone, a tablet Tablet Personal Computer, Laptop Computer, Personal Digital Assistant (PDA), Mobile Internet Device (MID), Wearable Device, E-reader, Navigator, Digital Camera, etc.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Under the inspiration of this application, those skilled in the art can also make many forms without departing from the purpose of the application and the scope of protection of the claims, all of which belong to the protection of the present application.

Claims

A folded waveguide resonator antenna, comprising a housing with a folded waveguide resonator and a metal partition, the housing is a right-angled triangular prism composed of three side surfaces, an upper surface and a lower surface parallel to each other;

The metal partition is arranged inside the folded waveguide resonator, the metal partition is fixedly connected to at least one side surface of the housing, there is a slotted gap between the metal partition and at least one side surface of the housing, and the metal partition divides the folded waveguide resonator into a first cavity and a second cavity;

There is a slit between at least one side surface of the casing and the upper surface and the lower surface, or a slit is provided on any surface of the casing.
The folded waveguide resonator antenna according to claim 1, wherein the ratio between the volume of the first cavity and the volume of the second cavity is within a preset range, and the thickness of the target cavity is greater than or equal to 3% of the side length of the folded waveguide resonator, and the target cavity is any one of the first cavity and the second cavity.
The folded waveguide resonant cavity antenna according to claim 1, wherein the folded waveguide resonant cavity is filled with a solid dielectric material, and the solid dielectric material is connected to three side surfaces, an upper surface and a lower surface of the casing.
The folded waveguide resonator antenna according to claim 1, wherein the feeding end of the folded waveguide resonator is arranged on the surface of the metal partition, and the grounding end of the folded waveguide resonator is arranged on the upper surface or the lower surface of the housing.
The folded waveguide resonator antenna according to claim 4, wherein the housing comprises a first side surface, a second side surface and a third side surface, and the metal partition is fixedly connected to the first side surface;

The distance between the feed end and the first side surface is greater than or equal to 6% of the side length of the folded waveguide resonator and less than or equal to 11% of the side length of the folded waveguide resonator, and the distance between the feed end and the end of the metal partition close to the second side surface is less than or equal to 50% of the side length of the folded waveguide resonator; or,

The distance between the feed end and the center line of the metal partition is greater than or equal to 18.5% of the side length of the folded waveguide resonator and less than or equal to 30% of the side length of the folded waveguide resonator, and the distance between the feed end and the end of the metal partition near the third side surface is less than or equal to 21% of the side length of the folded waveguide resonator.
The folded waveguide resonator antenna according to claim 1, wherein the housing comprises a first side surface, a second side surface and a third side surface, and the metal partition is fixedly connected to the first side surface;

The grounding end of the folded waveguide resonator is arranged on the second side surface, the feeding end of the folded waveguide resonator is arranged on an end of the metal partition close to the second side surface, and the distance between the feeding end and the first side surface is greater than or equal to 6% of the side length of the folded waveguide resonator and less than or equal to 12% of the side length of the folded waveguide resonator.
The folded waveguide resonator antenna according to claim 6, wherein the grounding end of the folded waveguide resonator is arranged on the third side surface, the feed end of the folded waveguide resonator is arranged on an end of the partition close to the third side surface, and the distance between the feed end and the centerline of the metal partition is greater than or equal to 25% of the side length of the folded waveguide resonator and less than or equal to 35% of the side length of the folded waveguide resonator.
The folded waveguide resonator antenna according to claim 1, wherein the folded waveguide resonator antenna further comprises a connector;

The metal partition is fixedly connected to at least one side surface of the housing through the connector, there is a slotted gap between the metal partition and the side surface of the housing except the at least one side surface, and there is a slot between the at least one side surface and the upper surface and the lower surface, or a slot is provided on any surface of the housing.
The folded waveguide resonator antenna according to claim 1, wherein the width of the slit is greater than or equal to 35% of the side length of the folded waveguide resonator, and the working frequency of the folded waveguide resonator is greater than or equal to 80% of the resonant frequency of the resonant cavity and less than or equal to 120% of the resonant frequency of the resonant cavity.
The folded waveguide resonator antenna according to claim 1, the folded waveguide resonator antenna comprises a first conductor layer, a first dielectric layer, a second conductor layer, a second dielectric layer and a third conductor layer stacked in sequence; wherein, the first dielectric layer is provided with a plurality of first conductive holes, one end of the first conductive hole is electrically connected to the first conductor layer, and the other end is connected to the second conductor layer, and the second dielectric layer is provided with a plurality of second conductive holes, one end of the second conductive hole is electrically connected to the second conductor layer, and the other end is connected to the third conductor layer, and the first conductor layer , the plurality of first conductive holes, the plurality of second conductive holes and the third conductor layer form the casing, and a part of the conductor region of the second conductor layer forms the metal separator.
An electronic device comprising the folded waveguide resonator antenna according to any one of claims 1 to 9.
The electronic device according to claim 11, comprising a metal surface, the metal surface of the electronic device being any one surface of the casing.
The electronic device according to claim 11, comprising a non-metallic surface, the non-metallic surface of the electronic device being any one surface of the casing.