CN212751135U - Double-feed-point microstrip antenna and radar - Google Patents
Double-feed-point microstrip antenna and radar Download PDFInfo
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- CN212751135U CN212751135U CN202120232200.5U CN202120232200U CN212751135U CN 212751135 U CN212751135 U CN 212751135U CN 202120232200 U CN202120232200 U CN 202120232200U CN 212751135 U CN212751135 U CN 212751135U
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Abstract
The utility model discloses a double feed point microstrip antenna belongs to microstrip antenna's technical field, solves the lower technical problem of signal transceiver function of prior art's product. Comprising a dielectric substrate comprising an etched surface and a ground plane, wherein: a closed metal antenna surface formed by polygons is arranged in the etching surface, first metal via holes and second metal via holes are arranged in the metal antenna surface at intervals, the polygons are arranged in a circular area formed by taking the center point to the farthest point as the radius, and the polygons are at least hexagons; the ground plane is equipped with the ground connection metal covering, the ground connection metal covering with first metal via hole and second metal via hole correspond the position and set up first metal hole and second metal hole, the metal antenna face is in be equipped with between first metal via hole and the second metal via hole and be used for anti-interference third metal via hole. The utility model discloses be used for perfecting the microstrip antenna function, satisfy people and have the requirement of higher performance to the antenna.
Description
Technical Field
The utility model belongs to the technical field of the antenna, a dual feed point microstrip antenna and radar is related to.
Background
In recent years, along with popularization of intelligent equipment, more and more intelligent terminals use a wireless communication technology, and an antenna is used as a key part of radio application systems such as radar, WiFi, Bluetooth, broadcasting and guidance, so that the performance of the system is greatly influenced. Particularly, with the development of the IOT technology, the smaller the product is, the stronger the antenna requirements of the wireless communication product on excellent performance, small area and low cost are.
The existing microstrip antenna (microstrip antenna) is an antenna formed by attaching a metal thin layer as a ground plate on one surface of a thin dielectric substrate, manufacturing a metal patch with a certain shape on the other surface by using methods such as photoetching corrosion and the like, drilling a through hole in the middle of the metal surface to the back surface as an access feed point of a signal, and feeding the patch by using a microstrip line or a coaxial probe.
Products in the prior art:
1. the antenna surface in the prior art is arranged in a circular structure, and under the condition of certain antenna shape, the size of the antenna size is in inverse proportion to the resonant frequency of the antenna, so that the signal receiving and transmitting functions of the antenna are influenced, and the product area and the cost are increased.
2. In the form of a single feed point antenna, such an antenna typically can only transmit or receive one link. For a full-duplex transmitting and receiving system, the disadvantage is that two antennas are needed to be used as a transmitting antenna and a receiving antenna respectively, so that a larger PCB area is needed, the product cost is increased, and the product miniaturization is not facilitated; secondly, when the system is required to be designed, a single feed point antenna is accessed after devices such as a balun and the like are added to a receiving and transmitting link, so that the complexity of the system design is increased, and the design difficulty of a product is greatly increased; and thirdly, the use mode of directly connecting the transmitting and receiving link to the single feed point antenna has poor transmitting and receiving isolation and limited system performance.
In view of this, the present invention is especially provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a double feed point microstrip antenna solves the lower technical problem of signal transceiver function of prior art's product. The technical scheme of the application has a plurality of technical beneficial effects, which are described as follows:
a dual feed point microstrip antenna, said dielectric substrate comprising an etched side and a ground side, wherein:
a closed metal antenna surface formed by polygons is arranged in the etched surface, first metal through holes and second metal through holes are arranged in the metal antenna surface at intervals, the first metal through holes are used for forming receiving feed points of the antenna, and the second metal through holes are used for forming transmitting feed points of the antenna; the polygon is arranged in a circular area formed by taking the center point to the farthest point as a radius, and the polygon is at least a hexagon;
the ground plane is provided with a ground metal surface, the ground metal surface is respectively provided with a first metal hole and a second metal hole at positions corresponding to the first metal via hole and the second metal via hole, and the diameters of the first metal hole and the second metal hole are respectively larger than the diameters of the first metal via hole and the second metal via hole;
and a third metal through hole used for resisting interference is arranged between the first metal through hole and the second metal through hole on the metal antenna surface.
In a preferred or optional embodiment, the third metal via is disposed at a center point of the metal antenna surface, and an area of the ground metal surface is larger than an area of the metal antenna surface.
In a preferred or optional embodiment, the first metal via and the second metal via are symmetrically disposed with the third metal via as a center, or a geometric figure enclosed by a connecting line of the first metal via and the second metal via and the third metal via is a triangle.
In a preferred or alternative embodiment, the metal antenna face is hexagonal or octagonal.
In a preferred or optional embodiment, a grounding metal surface is disposed on the ground plane at a position corresponding to the metal antenna surface, and a projection area of the grounding metal surface wraps a projection area of the metal antenna surface.
In a preferred or optional embodiment, the antenna further comprises a dielectric layer and a control metal layer, one surface of the dielectric layer and the ground plane clamp the ground metal surface, and the other surface is used for arranging the control metal layer.
In a preferred or alternative embodiment, the dielectric layer is a PCB board and/or the control metal layer is a chip.
Another aspect provides a radar comprising a dual feed point microstrip antenna as described in part or in whole above.
In a preferred or alternative embodiment, the device is used for transmitting and receiving signals in 5725-5875MHz band.
The utility model discloses a beneficial effect is at least as follows:
under the condition that the shape of the antenna is fixed, the size of the antenna surface is in inverse proportion to the resonant frequency of the antenna, namely, the larger the size of the antenna surface is, the lower the resonant frequency of the antenna is, therefore, the polygon is arranged in a circular area formed by connecting the central point of the polygon to the farthest point, the polygon is at least a hexagon, the area of the metal antenna surface is effectively reduced while the signal transceiving function is ensured, the resonant frequency of the antenna is improved, the transceiving performance of the duplex full-duplex antenna is integrally improved, the situation that the area of the corresponding antenna is larger for a certain required resonant frequency, the product area and the cost are increased is avoided, a third metal through hole for resisting interference is arranged between the first metal through hole and the second metal through hole on the metal antenna surface, and the third metal through hole sequentially penetrates through the metal antenna surface, the dielectric substrate and the grounding metal surface, the quality of signal reception is ensured, and interference is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a top view of a dual feed point microstrip antenna of the present invention;
fig. 2 is a bottom view of the dual feed point microstrip antenna of the present invention;
fig. 3 is a side view of the dual feed point microstrip antenna of the present invention;
fig. 4 is a side view of the dual feed point microstrip antenna of the present invention with other dielectric layers and control metal layers;
wherein:
1. a dielectric substrate; 11. a metal antenna surface; 12. a grounded metal surface; 111. a first metal via; 112. a second metal via; 113. a third metal via; 121. a first metal hole; 122. a second metal hole; 13. a dielectric layer; the metal layer is controlled 14.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such design may be implemented and/or such method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be further noted that the drawings provided in the following embodiments are only schematic illustrations for explaining the basic idea of the present invention, and only the components related to the present invention are shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of each component in actual implementation may be changed at will, and the layout of the components may be more complicated.
The dual-feeding-point microstrip antenna shown in fig. 1 includes a dielectric substrate 1, where the dielectric substrate 1 includes an etched surface and a ground surface, and the etched surface and the ground surface are the front surface and the back surface of the dielectric substrate 1 (i.e., the etched surface and the ground surface after being processed by a process).
The etching surface is provided with a closed metal antenna surface 11 formed by a polygon, the polygon is arranged in a circular area formed by taking the central point to the farthest point as a radius, and/or the polygon is at least a hexagon, and particularly, the metal antenna surface 11 adopts an equilateral or non-equilateral closed shape, such as a hexagon or an octagon. Compared with the circular antenna surface in the prior art, the structure of the application reduces the area of the antenna surface, and the resonance frequency of the antenna can be adjusted by adjusting the size of the polygon, according to the microwave antenna principle, under the condition of certain antenna shape, the size of the antenna surface size is inversely proportional to the resonant frequency of the antenna, that is, the larger the size of the antenna face, the lower the resonance frequency of the antenna, and therefore, the polygon of the present application is disposed within a circular area formed with the center point to the farthest point as a radius, the area of the metal antenna surface 11 is effectively reduced while the signal receiving and transmitting functions are guaranteed, so that the resonant frequency of the antenna is improved, the receiving and transmitting performance of the duplex antenna is integrally improved, the situation that the area of the corresponding antenna is large for a certain required resonant frequency, and the product area and the cost are increased is avoided.
As shown in fig. 1, a first metal via hole 111 and a second metal via hole 112 are disposed at an interval in the metal antenna surface 11, the first metal via hole 111 is used to form a receiving feed point of an antenna, and the second metal via hole 112 is used to form a transmitting feed point of the antenna, so that the antenna can receive and transmit signals in a duplex manner.
As shown in fig. 2, the ground plane is provided with a ground metal plane 12, the ground metal plane 12 is provided with a first metal hole 121 and a second metal hole 122 at positions corresponding to the first metal via hole 111 and the second metal via hole 112, and diameters of the first metal hole 121 and the second metal hole 122 are respectively greater than diameters of the first metal via hole 111 and the second metal via hole 112, so as to achieve the purpose of isolation and avoid signal interference during signal transceiving.
Through the structural arrangement of the antenna, the condition that a receiving and transmitting link is connected with a single feed point antenna after devices such as a balun and the like are added is avoided, the complex and difficult condition of system design is caused to appear, the receiving and transmitting link is directly connected to the using mode of the single feed point antenna, the receiving and transmitting isolation degree of the mode is poor, and the system performance is limited. The antenna has the advantages that the overall area or volume of the antenna can be reduced, and the antenna is more miniaturized.
As a part of embodiments provided by the present application, as shown in fig. 1 and fig. 2, a third metal via 113 for interference resistance is disposed between the first metal via 111 and the second metal via 112 on the metal antenna surface 11, and the third metal via 113 sequentially passes through the metal antenna surface 11, the dielectric substrate 1, and the grounding metal surface 12, so as to ensure the quality of signal reception and avoid interference.
The third metal via hole 113 is arranged at the center point of the polygon and is connected with the metal antenna surface 11 and the grounding metal surface 12 on the back surface, the via hole is equivalent to inductance for high-frequency RF signals and is equivalent to short circuit for low-frequency interference signals, and the influence of low-frequency interference on the system performance can be effectively reduced.
As some embodiments provided in the present application, as shown in fig. 1 and fig. 3, the third metal via 113 is disposed at a central point of the metal antenna plane 11, an area of the ground metal plane is larger than an area of the metal antenna plane 11, and for example, the first metal via 111 and the second metal via 112 are symmetrically disposed around the third metal via 113, or a geometric figure enclosed by a connecting line of the first metal via 111, the second metal via 112 and the third metal via 113 is triangular.
As some embodiments provided by the present application, a grounding metal surface 12 is disposed on the grounding surface at a position corresponding to the metal antenna surface 11, and a projection area of the grounding metal surface 12 wraps a projection area of the metal antenna surface 11 to enhance the signal transceiving performance.
As shown in fig. 4, the embodiment further includes a dielectric layer 13 and a control metal layer 14, one surface of the dielectric layer 13 and the ground plane sandwich the ground metal surface, and the other surface is used for disposing the control metal layer 14, for example, the dielectric layer 13 is a common FR-4 PCB board or a dielectric layer made of other materials in the prior art. The control metal layer 14 may be a chip, a resistor, a capacitor, or other component patch, a wiring layer, or the like, and performs a function of controlling signal transmission and reception of the antenna
Another aspect provides a radar including a dual feed point microstrip antenna as some or all of the above, e.g., for signal transceiving in the 5725 and 5875MHz bands. The function of receiving and transmitting double-station is realized, the signal strength is improved, and the interference of environmental factors to signals is avoided.
The product provided by the utility model is introduced in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for a person skilled in the art, without departing from the inventive concept of the present invention, several improvements and modifications can be made to the invention, and these improvements and modifications also fall within the scope of the claims of the invention.
Claims (9)
1. A dual feed point microstrip antenna comprising a dielectric substrate, wherein the dielectric substrate comprises an etched surface and a ground surface, wherein:
a closed metal antenna surface formed by polygons is arranged in the etched surface, first metal through holes and second metal through holes are arranged in the metal antenna surface at intervals, the first metal through holes are used for forming receiving feed points of the antenna, and the second metal through holes are used for forming transmitting feed points of the antenna; the polygon is arranged in a circular area formed by taking the center point to the farthest point as a radius, and the polygon is at least a hexagon;
the ground plane is provided with a ground metal surface, the ground metal surface is provided with a first metal hole and a second metal hole at positions corresponding to the first metal via hole and the second metal via hole, and the diameters of the first metal hole and the second metal hole are respectively larger than the diameters of the first metal via hole and the second metal via hole;
and a third metal through hole used for resisting interference is arranged between the first metal through hole and the second metal through hole on the metal antenna surface.
2. The dual feed point microstrip antenna of claim 1 wherein the third metal via is disposed at a center point of the metal antenna plane, the grounded metal plane having an area greater than the area of the metal antenna plane.
3. The dual feed point microstrip antenna of claim 2 wherein the first and second metal vias are arranged symmetrically about the third metal via, or wherein a geometric figure enclosed by connecting lines of the first and second metal vias and the third metal via is triangular.
4. The dual feed point microstrip antenna of claim 1 wherein the metal antenna plane is hexagonal or octagonal.
5. The dual feed point microstrip antenna of claim 1 wherein a grounded metal plane is disposed on the ground plane at a position corresponding to the metal antenna plane, and the projected area of the grounded metal plane wraps the projected area of the metal antenna plane.
6. The dual feed point microstrip antenna of claim 1 further comprising a dielectric layer and a control metal layer, one side of the dielectric layer and the ground plane sandwiching the ground metal plane and the other side configured to receive the control metal layer.
7. The dual feed point microstrip antenna of claim 6 wherein the dielectric layer is a PCB board and/or the control metal layer is a chip.
8. A radar comprising a dual feed point microstrip antenna according to any one of claims 1 to 7.
9. The radar as recited in claim 8, wherein the radar is configured for transceiving signals in the 5725-5875MHz band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120232200.5U CN212751135U (en) | 2021-01-28 | 2021-01-28 | Double-feed-point microstrip antenna and radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120232200.5U CN212751135U (en) | 2021-01-28 | 2021-01-28 | Double-feed-point microstrip antenna and radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212751135U true CN212751135U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120232200.5U Active CN212751135U (en) | 2021-01-28 | 2021-01-28 | Double-feed-point microstrip antenna and radar |
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| Country | Link |
|---|---|
| CN (1) | CN212751135U (en) |
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2021
- 2021-01-28 CN CN202120232200.5U patent/CN212751135U/en active Active
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