CN113300100A - Tunable microstrip antenna device - Google Patents
Tunable microstrip antenna device Download PDFInfo
- Publication number
- CN113300100A CN113300100A CN202110569478.6A CN202110569478A CN113300100A CN 113300100 A CN113300100 A CN 113300100A CN 202110569478 A CN202110569478 A CN 202110569478A CN 113300100 A CN113300100 A CN 113300100A
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- radiator
- main
- matching network
- radiating body
- impedance matching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
- H01Q5/55—Feeding or matching arrangements for broad-band or multi-band operation for horn or waveguide antennas
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- Waveguide Aerials (AREA)
Abstract
The invention provides a tunable microstrip antenna device, which comprises a medium substrate, a main radiator, a second radiator, a third radiator, a through hole, an impedance matching network and a feeder line, wherein the main radiator and the second radiator which are positioned on the same plane are arranged on the top surface of the medium substrate, the third radiator is arranged on the bottom surface of the medium substrate, the second radiator and the third radiator are communicated through the through hole, the impedance matching network and the feeder line are arranged at the position of the second radiator, a connection point arranged on the feeder line and the second radiator is connected with a feed point, and the impedance matching network is connected with the feed point and the main radiator. The antenna device is characterized in that the main body part is a printed circuit board, a radiator and a matching network are integrated, the cost is low, and the reference scene is flexible.
Description
Technical Field
The present invention relates to electronic devices, and particularly to a tunable microstrip antenna apparatus applied in an electronic device.
Background
The microstrip antenna has the advantages of low profile and low cost, and is widely applied to various fields of satellite communication, navigation telemetry, modern mobile communication, personal communication, medical devices and the like. However, the antenna developed at a single time can only be applied to the application scene of development requirement. When the working environment of the antenna changes, the resonant frequency of the antenna often changes, and at this time, the antenna needs to be developed again, and then the printed circuit board needs to be manufactured again. The need to increase the environmental adaptability of the antenna increases.
Disclosure of Invention
The primary objective of the present invention is to solve the above technical problems, and to provide a tunable microstrip antenna device with high environmental adaptability, which has the following technical scheme:
the top surface of the medium substrate is the main radiator and the second radiator which are positioned on the same plane, the bottom surface of the medium substrate is the third radiator, the second radiator and the third radiator are communicated through the through hole, the impedance matching network and the feeder are arranged at the position of the second radiator, the connection point of the feeder and the second radiator is connected with the feed point, and the impedance matching network is connected with the feed point and the main radiator.
The main radiator, the second radiator, the third radiator and the through holes are made of metal materials, the through holes are multiple and are fully distributed on the second radiator, and the second radiator and the third radiator are connected through the dielectric substrate.
The dielectric substrate is made of PTFE (polytetrafluoroethylene) with a dielectric constant of 2-4.3.
The impedance matching network comprises a plurality of devices connected in series and in parallel, and the devices can adopt inductors and capacitors, and the impedance of the tunable microstrip antenna device is adjusted through the impedance matching network.
The main radiator is connected with one end of an impedance matching network through a main microstrip line, and the other end of the impedance matching network is connected with a feed point through a secondary microstrip line.
The connecting point and the feeding point are both copper-exposed tin-added welding pads.
A first type of groove is formed between the second radiator and the main radiator, and the first type of groove is made of insulating materials and physically disconnects the second radiator from the main radiator.
And a second type of groove is arranged between the second radiator and the main microstrip line, between the second radiator and the secondary microstrip line and between the second radiator and the feed point, and the second type of groove is made of insulating materials, and the main microstrip line is coupled with the secondary microstrip line through devices of an impedance matching network.
And the main radiating body is provided with a slot for adjusting the resonant frequency.
The feeder line is a coaxial line, an outer conductor of the feeder line is electrically connected with a connection point on the second radiator, an inner conductor of the feeder line is electrically connected with the feed point through tin, and the other end of the feeder line is connected with the radio frequency connector.
The invention solves the problem of single application scene in single antenna development, develops multi-scene application once and greatly reduces the research and development cost.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived on the basis of these drawings without inventive effort:
fig. 1 is an external view of a tunable microstrip antenna apparatus according to the present invention;
fig. 2 is a schematic partial structure diagram of a tunable microstrip antenna apparatus according to the present invention;
fig. 3 is a schematic diagram of a matching network structure of the tunable microstrip antenna apparatus according to the present invention;
FIG. 4 is a schematic diagram of a bottom structure of the tunable microstrip antenna apparatus according to the present invention;
fig. 5 is a schematic diagram of a main radiator slot structure in the tunable microstrip antenna apparatus according to the present invention;
fig. 6 is a schematic diagram of a coaxial line feed structure of the tunable microstrip antenna apparatus of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
In the description of the present application, it is to be understood that the terms "center", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "primary" and "secondary" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "primary" or "secondary" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The tunable microstrip antenna device provided by the present invention is described in detail below with reference to embodiments.
As shown in fig. 1, fig. 2 and fig. 4, in the tunable microstrip antenna apparatus, an antenna apparatus body 1000 is a printed circuit board, and a radiator and a matching network are integrated, so that the cost is low and the introduction scenario is flexible. The radiator comprises a dielectric substrate 12, a main radiator 13, a second radiator 14, a third radiator 15 and a through hole 16, wherein the main radiator 13, the second radiator 14, the third radiator 15 and the through hole 16 are made of metal materials. In this embodiment, the metal material is copper, the dielectric substrate 12 is made of a general base material PTFE of the printed circuit board, the dielectric loss is low, the dielectric constant is selected from 2 to 4.3, the dielectric substrates with different dielectric constants are selected to adjust the impedance of the antenna and the maximum radiation direction of the antenna, and the size of the antenna can be reduced by selecting the dielectric substrate with a higher dielectric constant. The top surface of the dielectric substrate 12 is provided with a main radiator 13 and a second radiator 14, the main radiator 13 and the second radiator 14 are located on the same plane, the bottom surface of the dielectric substrate 12 is provided with a third radiator 15, the second radiator 14 is provided with a plurality of through holes 16, the through holes 16 are distributed on the second radiator 14, and the second radiator 14 and the third radiator 15 are connected by penetrating through the dielectric substrate 12.
The antenna apparatus body 1000 further includes an impedance matching network 20, and as shown in fig. 3, the impedance matching network 20 includes a plurality of series-connected and parallel-connected devices 201. The device 201 may be an inductor or a capacitor. When the antenna device is applied to different environments, the impedance of the antenna changes, and the resonant frequency of the antenna changes correspondingly. The impedance of the antenna device is adjusted by the impedance matching network 20 so that the antenna device operates in a desired frequency band.
The main radiator 13 is connected with one end of the impedance matching network 20 through the main microstrip line 202, the other end of the impedance matching network 20 is connected with a section of the secondary microstrip line 181, the tail end of the secondary microstrip line 181 is provided with a feed point 18, and the feed point 18 is connected with the impedance matching network 20 through the secondary microstrip line 181. The feeding point 18 is a copper-exposed tin-added pad and is located at the second radiator 14. A connection point 17 is arranged on the second radiator 14 near the slot-separated adjacent to the feeding point 18, and the connection point 17 is also a tinned pad with exposed copper.
A first-type groove 51 is formed between the second radiator 14 and the main radiator 13, and the first-type groove 51 is made of insulating materials such as paint, that is, the second radiator 14 is physically disconnected from the main radiator 13.
A second slot 52 is arranged between the second radiator 14 and the main microstrip line 202, the sub microstrip line 181 and the feeding point 18. The main microstrip line 202 is disconnected from the sub microstrip line 181 on the printed circuit board and coupled through the device 201. The second-type grooves 52 are made of the same material as the first-type grooves 51, and the second-type grooves 52 are not as wide as the first-type grooves 51. The vias 16 are densely arranged on the second radiator 14 near the first type of slot 51 and the second type of slot 52.
As shown in fig. 5, the impedance and gain of the antenna will change by adjusting the length of the main radiator 13. The maximum size of the antenna is determined by predicting the application scene of the antenna, so as to determine the length of the main radiator 13. The main radiator 13 is provided with the slot 131 to increase a current path and adjust the impedance of the antenna, and the length of the slot 131 is increased, so that the resonant frequency of the antenna is reduced. It can be seen that the main emitter slot changes the current path to adjust the resonant frequency. The slots 131 are arranged in the front and rear directions, and the larger the number of slots, the longer the current path, and the smaller the influence of the width of the slot 131 on the resonant frequency of the antenna.
As shown in fig. 6, the third radiator 15 is disposed below the dielectric substrate 12, and the third radiator 15 and the second radiator 14 are connected by a plurality of through holes 16. The through holes 16 are all in a direction perpendicular to the top surface of the dielectric substrate. There is no through-hole between the main radiator 13 and the third radiator 15, i.e. the main radiator 13 is electrically disconnected from the third radiator 15.
A feeder 31 is arranged on the second radiator 14, and the feeder 31 is a coaxial line. The outer conductor 172 of the feed line 31 is electrically connected to the connection point 17 on the second radiator 14, and the inner conductor 32 of the feed line 31 is electrically connected to the feed point 18 by tin 182. The other end of the feeder line 31 may be a radio frequency connector such as an SMA connector or an N-type connector, as required.
The material and size of the main radiator 13, the second radiator 14, and the third radiator 15, the material of the dielectric substrate 12, the position and number of the through holes 16, the width of the first type slot 51 and the second type slot 52, the size of the feeding point 18, the size of the feeding line 181 and the feeding line 202, and the like are first characteristics of the antenna device body 1000. The selection of the device 201 in the impedance matching network 20 is a second feature of the antenna device body 1000. The first characteristic of the antenna device body 1000 is determined and then is not changeable in the development stage. The second feature of the antenna device body 1000 is a tunable portion, and the second feature of the antenna device body 1000 is changed according to different antenna application scenarios.
After two characteristics of the antenna are abstracted, the development time cost and the material cost of the antenna are greatly reduced.
Although the antenna device and the application scenario thereof provided by the embodiments of the present application have been described in detail, the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and all such changes and substitutions are intended to be covered by the scope of the present application. Accordingly, the subject matter of this specification should not be construed as limiting the application.
Claims (10)
1. A tunable microstrip antenna arrangement characterized by: the antenna comprises a medium substrate, a main radiating body, a second radiating body, a third radiating body, a through hole, an impedance matching network and a feeder line, wherein the main radiating body and the second radiating body are positioned on the same plane on the top surface of the medium substrate, the third radiating body is arranged on the bottom surface of the medium substrate, the second radiating body is communicated with the third radiating body through the through hole, the impedance matching network and the feeder line are arranged at the second radiating body, a connection point of the feeder line and the second radiating body is connected with the feed point, and the impedance matching network is connected with the feed point and the main radiating body.
2. The tunable microstrip antenna arrangement of claim 1, wherein: the main radiator, the second radiator, the third radiator and the through holes are made of metal materials, the through holes are multiple and are fully distributed on the second radiator, and the second radiator and the third radiator are connected through the dielectric substrate.
3. The tunable microstrip antenna arrangement of claim 1, wherein: the dielectric substrate is made of PTFE (polytetrafluoroethylene) with a dielectric constant of 2-4.3.
4. The tunable microstrip antenna arrangement of claim 1, wherein: the impedance matching network comprises a plurality of devices connected in series and in parallel, and the devices can adopt inductors and capacitors, and the impedance of the tunable microstrip antenna device is adjusted through the impedance matching network.
5. The tunable microstrip antenna arrangement of claim 1, wherein: the main radiator is connected with one end of an impedance matching network through a main microstrip line, and the other end of the impedance matching network is connected with a feed point through a secondary microstrip line.
6. The tunable microstrip antenna arrangement of claim 1, wherein: the connecting point and the feeding point are both copper-exposed tin-added welding pads.
7. The tunable microstrip antenna arrangement of claim 1, wherein: a first type of groove is formed between the second radiator and the main radiator, and the first type of groove is made of insulating materials and physically disconnects the second radiator from the main radiator.
8. The tunable microstrip antenna arrangement of claim 5, wherein: and a second type of groove is arranged between the second radiator and the main microstrip line, between the second radiator and the secondary microstrip line and between the second radiator and the feed point, and the second type of groove is made of insulating materials, and the main microstrip line is coupled with the secondary microstrip line through devices of an impedance matching network.
9. The tunable microstrip antenna arrangement of claim 1, wherein: and the main radiating body is provided with a slot for adjusting the resonant frequency.
10. The tunable microstrip antenna arrangement of claim 1, wherein: the feeder line is a coaxial line, an outer conductor of the feeder line is electrically connected with a connection point on the second radiator, an inner conductor of the feeder line is electrically connected with the feed point through tin, and the other end of the feeder line is connected with the radio frequency connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110569478.6A CN113300100A (en) | 2021-05-25 | 2021-05-25 | Tunable microstrip antenna device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110569478.6A CN113300100A (en) | 2021-05-25 | 2021-05-25 | Tunable microstrip antenna device |
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| CN113300100A true CN113300100A (en) | 2021-08-24 |
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| CN202110569478.6A Pending CN113300100A (en) | 2021-05-25 | 2021-05-25 | Tunable microstrip antenna device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114261602A (en) * | 2021-10-28 | 2022-04-01 | 浙江菜鸟供应链管理有限公司 | Radio frequency packaging box and processing method thereof |
| CN114628892A (en) * | 2022-04-07 | 2022-06-14 | 展讯通信（上海）有限公司 | PCB antenna and electronic equipment |
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