Antenna and heating device having the same

Abstract

The present application relates to the field of communication technology, and discloses an antenna, comprising: a substrate, comprising a first surface, a second surface and a through hole penetrating the first surface and the second surface; a radiation patch, arranged on the first surface of the substrate, configured to radiate a signal; a ground patch, arranged on the second surface of the substrate, and completely covering the second surface; the through hole, arranged in the center of the substrate; the radiation patch and the ground patch are electrically connected through the through hole. In the embodiment of the present disclosure, the size of the antenna is reduced and the unidirectional radiation efficiency of the signal is improved through the design that the ground patch completely covers the second surface of the substrate, and the radiation patch and the ground patch are connected through the through hole in the center of the substrate, so as to ensure that the antenna can be arranged in a smaller installation space, and improve the radiation efficiency of the antenna signal during communication with external equipment when used in a confined space. The present application also discloses a heating device, which includes the above-mentioned antenna.

Description

Technical Field

[0001] The present application relates to the field of communication technology, for example, to an antenna and a heating device having the same. Background Art

[0002] At present, heating equipment such as ovens, microwave ovens and thawing machines are widely used due to their rapid heating characteristics. With the development of intelligence, heating equipment will transmit the signal inside the heating equipment to the outside of the heating equipment through a wireless fidelity (WIFI) antenna, and receive control signals sent by external devices. For commonly used monopole antennas and dipole antennas, the antenna installation position is the front panel. Usually, 80% of the area of ​​the front panel is occupied by the door structure. In addition to the display control area, the front panel area is usually treated with metal brushing process to improve the shielding of microwaves to avoid microwave leakage and improve the aesthetic appearance of the product. As a result, the antenna is like being in a closed metal cavity and cannot maintain good communication with the outside of the heating cavity.

[0003] In the prior art, slot antennas are used for heating devices, and signals are radiated to the outside space through the slots, thus avoiding the influence of the metal wire drawing process on the transmission signal of the slot antenna. When the size of the radiation window and the length of the coupling line are greater than half of the wavelength of the radiated electromagnetic wave, the slot antenna can maintain good communication with the outside of the heating cavity.

[0004] In the process of implementing the embodiments of the present disclosure, it was found that at least the following problems exist in the related art: the slot antenna is large in size, and the installation space of the display control area of ​​the heating device is limited, which cannot meet the installation requirements of the slot antenna and will affect the radiation efficiency of the slot antenna. Summary of the invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide an antenna and a heating device having the same to solve the technical problem in the prior art that the installation space of the display control area of ​​the heating device is limited and cannot meet the installation requirements of the slot antenna, thus affecting the radiation efficiency of the slot antenna.

[0007] In some embodiments, the antenna comprises:

[0008] A substrate, comprising a first surface, a second surface and a through hole passing through the first surface and the second surface;

[0009] a radiation patch, disposed on the first surface of the substrate and configured to radiate a signal;

[0010] A ground patch, disposed on the second surface of the substrate and completely covering the second surface;

[0011] The through hole is arranged at the center of the substrate; the radiation patch and the ground patch are electrically connected through the through hole.

[0012] In some embodiments, a heating device includes a control panel, a signal generator, and the above-mentioned antenna;

[0013] The antenna is arranged inside the control panel and connected to the signal generator;

[0014] The grounding patch is arranged away from the control panel;

[0015] The radiation patch is arranged toward the control panel.

[0016] The antenna and the heating device having the same provided by the embodiments of the present disclosure can achieve the following technical effects:

[0017] By completely covering the second surface of the substrate with the ground patch and connecting the radiation patch and the ground patch through a through hole in the center of the substrate, the size of the antenna is reduced and the unidirectional radiation efficiency of the signal is improved, thereby ensuring that the antenna can be set in a smaller installation space and improving the radiation efficiency of the antenna signal during communication with external equipment when used in a confined space.

[0018] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0020] Figure 1 is a structural schematic diagram of an antenna provided by an embodiment of the present disclosure;

[0021] Figure 2 is a structural schematic diagram of another antenna provided by an embodiment of the present disclosure;

[0022] Figure 3 It is a structural diagram of the coordinated installation of an antenna and a control panel provided in an embodiment of the present disclosure;

[0023] Figure 4 is a return loss characteristic curve diagram obtained by simulating the antenna provided in the embodiment of the present disclosure;

[0024] Figure 5is a simulated 3D radiation pattern of the antenna provided by an embodiment of the present disclosure;

[0025] Figure 6 is the far-field direction of the antenna provided by the embodiment of the present disclosure Figure 2 Dimensional simulation diagram. DETAILED DESCRIPTION

[0026] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0027] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0028] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0029] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0030] Unless otherwise stated, the term "plurality" means two or more.

[0031] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0032] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0034] Figure 1 It is a structural schematic diagram of an antenna provided in an embodiment of the present disclosure. As shown in the figure, the antenna includes: a substrate 1, a radiation patch 2, a ground patch 3 and a through hole 4.

[0035] The substrate 1 includes a first surface, a second surface and a through hole 4 that penetrates the first surface and the second surface.

[0036] The radiation patch 2 is disposed on the first surface of the substrate 1 and is configured to radiate a signal.

[0037] The ground patch 3 is arranged on the second surface of the substrate 1 and completely covers the second surface. The antenna provided in the embodiment of the present application is mainly used for a heating device or a thawing device that heats by microwaves. The antenna in the device is mostly arranged in the panel area to receive control signals and communicate with external devices. In this embodiment, the design of the ground patch 3 completely covering the second surface of the substrate 1 is adopted, which effectively suppresses the radiation of the signal toward the side of the ground patch 3, improves the radiation efficiency of one side of the antenna, ensures that the antenna can effectively radiate the signal outside the device, and improves the communication efficiency with external related devices.

[0038] The through hole 4 is arranged at the center of the substrate 1. The radiation patch 2 and the ground patch 3 are electrically connected through the through hole 4. The through hole 4 prevents the antenna from being unevenly installed due to the solder joint between the radiation patch 2 and the ground patch 3, thereby simplifying the antenna assembly process.

[0039] In the disclosed embodiment, the ground patch completely covers the second surface of the substrate, and the radiation patch and the ground patch are connected through a through hole in the center of the substrate. This reduces the size of the antenna and improves the unidirectional radiation efficiency of the signal, thereby ensuring that the antenna can be set in a smaller installation space and improving the radiation efficiency of the antenna signal during communication with external devices when used in a confined space.

[0040] In some embodiments, the via 4 is a metal via.

[0041] In some embodiments, the metal through hole is formed by filling metal on the surface of the through hole through an electroplating process. Optionally, the material of the plated layer in the electroplating process is copper.

[0042] In some embodiments, the feeding point of the radiation patch 2 coincides with the position of the metal through hole, so as to match the antenna impedance, increase the signal transmission power, improve the communication quality, and realize effective communication between the main device and the external device in the specific application process.

[0043] In some embodiments, the radiation patch 2 is a centrally symmetrical or axially symmetrical polygon or circle. The symmetrical distribution ensures uniform distribution of signals during the signal radiation process of the radiation patch 2, and at the same time, reduces the difficulty of manufacturing the radiation patch 2, improves the processing rate, and is suitable for mass production.

[0044] In some embodiments, the radiation patch 2 is a closed ring-shaped radiation element.

[0045] In some embodiments, the radiation patch 2 is a hollow D-shaped patch.

[0046] In some embodiments, Figure 1 and Figure 2 As shown, the D-shaped patch in the present application includes: a rectangular radiating portion and an arc radiating portion, and the D-shaped patch is symmetrically distributed along the center line of the length direction of the rectangle. The length and width of the rectangular radiating portion and the width of the arc radiating portion are determined according to the frequency of the antenna radiation signal and the length of the substrate 1.

[0047] In some embodiments, the area of ​​the radiation patch 2 is determined according to the frequency of the antenna radiation signal. After the area of ​​the slice is determined, the length, width or radius of the radiation patch 2 can be further determined according to the shape of the radiation patch 2.

[0048] In some embodiments, the minimum distance between the edge of the radiation patch 2 and the edge of the first surface of the substrate 1 is greater than or equal to a first set value. During the signal radiation process, the effective length of the antenna is greater than the actual length of the antenna. To ensure that the signal radiated by the antenna is radiated in an ideal direction, the area of ​​the substrate 1 is greater than the length of the antenna.

[0049] In some embodiments, the first setting value is determined according to the frequency of the signal radiated by the antenna.

[0050] In some embodiments, there is the following relationship between the length of the radiation patch 2 and the frequency of the antenna radiation signal:

[0051]

[0052] Wherein, l is the length of the radiation patch 2; v is the propagation velocity of the signal; and f is the frequency of the signal.

[0053] During the signal radiation process, the effective length of the antenna is greater than the actual length of the antenna. To ensure that the signal radiated by the antenna is radiated in an ideal direction, the minimum value of the length of the substrate 1, i.e., the first set value, and the frequency of the antenna radiation signal have the following relationship:

[0054]

[0055] Wherein, L is the length of the radiation patch 2; v is the propagation velocity of the signal; and f is the frequency of the signal.

[0056] In the embodiment of the present disclosure, the substrate 1 is rectangular, and when the minimum length is determined according to the above formula, the minimum width of the substrate 1 is determined. When the radiation patch 2 is polygonal, the length of the radiation patch 2 determined according to the above formula is the length of the projection of the radiation patch 2 in the length direction or width direction of the substrate 1.

[0057] The embodiments of the present disclosure also provide a heating device, including a control panel and the antenna provided in the above embodiments.

[0058] Figure 3 The schematic diagram is a schematic diagram of the structure of the antenna and the control panel provided in the embodiment of the present disclosure. The control panel 20 includes: a visual window 201 and a columnar assembly 202.

[0059] The antenna 10 is arranged inside the control panel 20. The control panel 20 is used to select the control instructions of the heating device and display the status information, and is arranged on the surface of the heating device. The antenna 10 is arranged inside the control panel 20 to reduce the distance between the antenna 10 and the control module of the heating device, and shorten the distance between the antenna 10 and the external space.

[0060] Figure 2 It is a structural schematic diagram of an antenna provided in an embodiment of the present disclosure. As shown in the figure, the antenna includes: a substrate 1, a radiation patch 2, a ground patch 3, a through hole 4 and a notch 5.

[0061] The notch 5 is configured to cooperate with the columnar assembly 202 to fix the antenna 10, thereby ensuring that the antenna 10 is firmly arranged on the control panel 20 to prevent loosening or falling off to affect communication efficiency.

[0062] The ground patch 3 is arranged away from the control panel 20, and the radiation patch 2 is arranged toward the control panel 20. The ground patch 3 reduces the radiation signal toward the inside of the heating device, so as to improve the efficiency of the radiation patch 2 sending signals to the outside of the heating device through the control panel 20.

[0063] In some embodiments, the minimum distance between the radiation patch 2 and the center of the notch 5 is greater than or equal to the second set value. This is to ensure that the minimum distance between the edge of the radiation patch 2 and the edge of the substrate 1 is greater than or equal to the first set value. According to the above embodiments, the second set value is determined according to the radius of the notch 5 and the first set value.

[0064] In some embodiments, the control panel 20 and the antenna 10 are snap-fitted together, and the substrate 1 of the antenna 10 is Figure 1 The structure shown.

[0065] like Figure 4 The figure shows a return loss characteristic curve obtained according to actual simulation. The return loss of the antenna of the present invention at the resonance point is -13.1603 dB, which shows that the antenna has good matching characteristics.

[0066] Figure 5 is a simulated 3D radiation pattern of the antenna provided in an embodiment of the present disclosure, Figure 6 is the far-field direction of the antenna provided by the embodiment of the present disclosure Figure 2 Dimensional simulation diagram. Figure 5 and Figure 6 It can be seen that when the antenna of the present application is used in a heating device, omnidirectional radiation in space is ensured. It can be determined that the solution provided by the present application can be applied to other closed devices where the antenna installation space is small.

[0067] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An antenna, characterized in that: include: A substrate, comprising a first surface, a second surface and a through hole passing through the first surface and the second surface; a radiation patch, disposed on the first surface of the substrate and configured to radiate a signal; A ground patch, disposed on the second surface of the substrate and completely covering the second surface; The through hole is arranged at the center of the substrate; The radiation patch and the ground patch are electrically connected through the through hole; The radiation patch is a hollow D-shaped patch, and the D-shaped patch includes: a rectangular radiation portion and an arc-shaped radiation portion; the length and width of the rectangular radiation portion and the width of the arc-shaped radiation portion are determined according to the frequency of the antenna radiation signal and the length of the substrate; There is the following relationship between the length of the radiating patch and the frequency of the antenna radiated signal: Wherein, l is the length of the radiation patch, the length of the radiation patch is the length of the radiation patch projected in the length direction or the width direction of the substrate, v is the propagation velocity of the signal, and f is the frequency of the signal.

2. The antenna according to claim 1, characterized in that The through hole is a metal through hole, and the feeding point of the radiation patch coincides with the position of the metal through hole.

3. The antenna according to claim 1, characterized in that A minimum distance between an edge of the radiation patch and an edge of the first surface of the substrate is greater than or equal to a first set value.

4. The antenna according to claim 3, characterized in that: The first setting value is determined according to the frequency of the signal radiated by the antenna.

5. A heating device, characterized in that: comprising a control panel and an antenna as claimed in any one of claims 1 to 4; The antenna is arranged inside the control panel; The grounding patch is arranged away from the control panel; The radiation patch is arranged toward the control panel.

6. The heating device according to claim 5, characterized in that The control panel also includes: a columnar assembly; The substrate further includes a notch configured to cooperate with the columnar assembly to fix the antenna.

7. The heating device according to claim 6, characterized in that The minimum distance between the radiation patch and the center of the notch is greater than or equal to a second set value.

Images