CN116646741A - Yagi antenna and communication equipment - Google Patents
Yagi antenna and communication equipment Download PDFInfo
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- CN116646741A CN116646741A CN202310715347.3A CN202310715347A CN116646741A CN 116646741 A CN116646741 A CN 116646741A CN 202310715347 A CN202310715347 A CN 202310715347A CN 116646741 A CN116646741 A CN 116646741A
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- yagi antenna
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- driver
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- 238000004891 communication Methods 0.000 title claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 230000010355 oscillation Effects 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 33
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 230000005855 radiation Effects 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract 2
- 239000003989 dielectric material Substances 0.000 description 6
- 230000003071 parasitic effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
- H01Q19/30—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
The invention relates to a yagi antenna and communication equipment. A yagi antenna comprising: a substrate; the substrate has opposite first and second surfaces; an antenna main body; the antenna main body is arranged on the first surface of the substrate and comprises a reflector and a driver; a plurality of dielectric resonators; the dielectric resonators are arranged along the axis direction of the substrate to form a dielectric resonator array; and a separation sheet is arranged between two adjacent dielectric resonators, and the dielectric resonator array is positioned on the first surface of the substrate and adjacent to the driver. A communication device comprising the yagi antenna described above. By adding the design of the isolation sheet and the dielectric resonator with TE111 oscillation mode, the dielectric resonator array formed by the isolation sheet and the dielectric resonators is adopted, the interval between the dielectric resonators is reduced on the premise of ensuring the unchanged radiation performance, the overall size of the yagi antenna is effectively reduced, and the miniaturization degree of the yagi antenna is improved.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a yagi antenna and a communication device.
Background
With the rapid development of wireless communication industry, there is a demand for miniaturization, wide frequency band, low loss, and other performances of antennas. The yagi antenna has good directivity and higher gain than the conventional dipole antenna. The yagi antenna is particularly good in both the direction-finding effect and the long-distance communication effect, and thus has been intensively studied and widely used.
However, the conventional yagi antenna is based on an array of one electric dipole plus an array of a plurality of parasitic antennas, and in order to reduce the mutual coupling influence between the parasitic antennas, the spacing distance between the parasitic antennas is large, so that the conventional yagi antenna is large and not compact enough.
Disclosure of Invention
The invention provides a yagi antenna and communication equipment, which aim to solve the technical problem of larger antenna volume caused by larger spacing distance between parasitic antennas in the prior art.
In order to solve the technical problems, the embodiment of the invention adopts a technical scheme that: a yagi antenna is provided. The yagi antenna includes: a substrate having opposing first and second surfaces; an antenna main body; the antenna main body is arranged on the first surface of the substrate and comprises a reflector and a driver; a plurality of dielectric resonators; the dielectric resonators are arranged along the axis direction of the substrate to form a dielectric resonator array;
and a separation sheet is arranged between two adjacent dielectric resonators, and the dielectric resonator array is positioned on the first surface of the substrate and adjacent to the driver.
In some embodiments, the oscillation mode of the dielectric resonator is a magnetic dipole TE111 mode.
In some embodiments, the spacer sheet is closely attached to the adjacent dielectric resonators for forming a magnetic wall between the adjacent two dielectric resonators.
In some embodiments, the antenna body further comprises: a signal column; the signal column is arranged at one end of the substrate far away from the dielectric resonator array; a microstrip; the microstrip is arranged on the first surface of the substrate and is connected with the signal column and the driver.
In some embodiments, the signal post extends through the substrate, having a first end and a second end that are remote from each other;
the first end part is positioned on the first surface and connected with the microstrip; the second end is located on the second surface.
In some embodiments, the antenna body further comprises: and the balun is arranged on the first surface of the substrate and is positioned between the microstrip and the driver.
In some embodiments, the driver is comprised of a strip-shaped first metal strip and a second metal strip; the first metal strip and the second metal strip are arranged on the first surface of the substrate side by side and are respectively connected with the two connecting parts of the balun.
In some embodiments, the reflector is comprised of a strip of third metal strip and a fourth metal strip;
the third metal strip and the fourth metal strip are arranged side by side on the first surface of the substrate between the driver and the balun.
In some embodiments, the reflector and the driver have a first predetermined distance therebetween; the dielectric resonator array has a second predetermined distance from the drive.
Alternatively, the separator sheet is made of a material having a high dielectric constant.
Optionally, the thickness of the spacer sheet should be less than 0.15 λ, λ being the wavelength of the signal radiated by the yagi antenna.
Optionally, the magnetic wall formed by the spacer sheet is used for transferring energy and for making the individual dielectric resonators unaffected by coupling.
Optionally, the substrate includes: a first dielectric plate, a second dielectric plate, and a third dielectric plate;
the second dielectric plate is located between the first dielectric plate and the third dielectric plate, the surface of the first dielectric plate, which faces away from the second dielectric plate, is the first surface, and the surface of the third dielectric plate, which faces away from the second dielectric plate, is the second surface.
Optionally, the magnetic dipole is used to radiate electromagnetic waves into space.
Optionally, the balun is a balun for converting the radiation signal into a differential transmission, so that the radiation signal is converted between a balanced and an unbalanced state or an impedance transformation is achieved.
Alternatively, the balun may be "convex" shaped; one end of the balun is a closed end, and the other end of the balun is an open end; wherein the two connecting parts are positioned at the opening end of the balun; the closed end of the balun is connected with the microstrip.
Optionally, the reflector is configured to reflect electromagnetic waves radiated in a direction toward the reflector, so as to enhance directivity of the yagi antenna and reduce interference of spatial noise on the yagi antenna.
In order to solve the technical problems, another technical scheme adopted by the embodiment of the invention is as follows: a communication device is provided. The communication device comprises the yagi antenna.
Alternatively, the communication device may be a radio receiver or transmitter.
Alternatively, yagi antennas are typically composed of two parts, a main element and an auxiliary element; wherein, the principal element is generally made of metal, is linear or planar and is used for receiving or transmitting electromagnetic waves; the auxiliary elements are special metal strips which are arranged around the main element and have a certain distance and angle relation with the main element.
Alternatively, the main element is the main working part of the yagi antenna, and is generally divided into a driver and a reflector; wherein the driver is typically comprised of an elongated metal strip for receiving or transmitting electromagnetic waves; the reflector is generally composed of a metal strip having a length slightly longer than that of the driver for reflecting electromagnetic waves received or emitted by the driver.
Optionally, the auxiliary element is used for forming a directional radiation mode at two sides of the main element, is generally composed of a plurality of metal strips, is arranged at one side or two sides of the main element, and has a certain distance and angle relation with the main element; the optimized design of parameters such as the number, the length, the distance, the angle and the like of the auxiliary elements can enable the yagi antenna to achieve higher gain and better direction characteristics.
Alternatively, in order to transmit electromagnetic waves received or transmitted by the yagi antenna to the communication device, it is generally necessary to connect between the yagi antenna and the communication device by a cable; one end of the cable is connected with the yagi antenna, and the other end of the cable is connected with the communication equipment.
Alternatively, the magnetic dipole TE111 mode is an oscillation mode in the dielectric resonator, also in the form of electromagnetic wave propagation; wherein TE represents only transverse magnetic waves (Transverse Magnetic) and no longitudinal Electric waves (Electric) in the electromagnetic field; 111 indicates that in the cross section of the dielectric resonator, the magnetic field oscillates in one direction and oscillates by an integer multiple of the wavelength of one electric wave.
Optionally, the dielectric resonator (Dielectric Resonator) is a device that generates a resonance phenomenon by oscillation of electromagnetic waves inside a dielectric material; is usually made of high dielectric constant ceramic, quartz and other materials; the working principle of the dielectric resonator is based on the characteristics of high dielectric constant, low conductivity, dielectric polarity, dielectric polarization and the like of dielectric materials, and when one end face is fully exposed in free space and the other end face is connected with a microwave guiding path through an electrode, resonance phenomenon can occur between two ends of the dielectric resonator;
alternatively, when external electromagnetic waves interact with the dielectric resonator, the electromagnetic waves gradually propagate along the electric field and magnetic field distribution in the dielectric resonator, and the electric field and magnetic field energy in the propagation process can be accumulated and dissipated in a large amount in the dielectric resonator due to the fact that the dielectric constant of the dielectric material is high compared with that of external air or vacuum, and finally a resonance effect is formed.
The beneficial effects are that: the yagi antenna provided by the invention uses a dielectric resonator array consisting of a plurality of dielectric resonators and a separation sheet. Compared with the traditional yagi antenna using a plurality of parasitic antennas, the overall size of the antenna can be effectively reduced and the miniaturization degree of the yagi antenna can be improved on the premise of ensuring that the radiation performance is kept unchanged.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
Fig. 1 is an exploded perspective view of a yagi antenna according to an embodiment of the present invention;
fig. 2 is a structural layout diagram of a yagi antenna according to an embodiment of the present invention.
Detailed Description
In order that the invention may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "away", "near", "towards" and the like as used in this specification indicate an orientation or positional relationship based on that shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements in question must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
In addition, the technical features mentioned in the different embodiments of the invention described below can be combined with one another as long as they do not conflict with one another.
A dielectric resonator antenna (Dielectric Resonator Antenna, DRA).
Fig. 1 is an exploded perspective view of a yagi antenna according to an embodiment of the present invention. Referring to fig. 1, the yagi antenna 100 includes: a substrate 10, an antenna main body 20, and a plurality of dielectric resonators 30;
wherein the substrate 10 has a first surface 11 and a second surface 12 opposite to each other; the antenna body 20 is disposed on the first surface 11 of the substrate 10, and includes a reflector 21 and a driver 22; the dielectric resonators 30 are arranged along the axial direction X of the substrate 10 to form a dielectric resonator array;
wherein a spacer foil 40 is arranged between two adjacent dielectric resonators 30, said array of dielectric resonators being located adjacent to the drive 22 on the first surface 11 of the substrate 10.
With continued reference to FIG. 1, the oscillation mode of the dielectric resonator 30 is a magnetic dipole TE111 mode.
With continued reference to fig. 1, the spacer 40 is disposed against adjacent dielectric resonators 30 to form a magnetic wall between adjacent dielectric resonators 30.
With continued reference to fig. 1, the antenna body 20 further includes: a signal post 23 and a microstrip 24;
wherein the signal post 23 is disposed at an end of the substrate 10 remote from the dielectric resonator array; the microstrip 24 is disposed on the first surface 11 of the substrate 10, and connects the signal post 24 and the driver 22.
With continued reference to fig. 1, the signal post 23 extends through the substrate and has a first end 231 and a second end 232 that are spaced apart from each other;
wherein the first end 231 is located on the first surface 11 and connected to the microstrip 24; the second end 232 is located on the second surface 12.
With continued reference to fig. 1, the antenna body 20 further includes: balun 25;
wherein the balun 25 is disposed on the first surface 11 of the substrate 10 and between the microstrip 24 and the driver 22.
With continued reference to fig. 1, the driver 22 is composed of a strip-shaped first metal strip 221 and a strip-shaped second metal strip 222; the first metal strip 221 and the second metal strip 222 are arranged side by side on the first surface 11 of the substrate 10, and are connected to two connection portions of the balun 25, respectively.
Fig. 2 is a structural layout diagram of a yagi antenna according to an embodiment of the present invention. Referring to fig. 1 and 2, the reflector 21 is composed of a strip-shaped third metal strip 211 and a strip-shaped fourth metal strip 212; the third metal strip 211 and the fourth metal strip 212 are arranged side by side on the first surface 11 of the substrate 10, between the driver 22 and the balun 25;
wherein, a first preset distance 213 is provided between the reflector 21 and the driver 22; the array of dielectric resonators has a second predetermined distance 223 from the drive 22.
In some embodiments, referring to fig. 1 and 2, the substrate 10 includes: a first dielectric plate 13, a second dielectric plate 14, and a third dielectric plate 15;
the second dielectric plate 14 is located between the first dielectric plate 13 and the third dielectric plate 15, the surface of the first dielectric plate 13 facing away from the second dielectric plate 14 is the first surface 11, and the surface of the third dielectric plate 15 facing away from the second dielectric plate 14 is the second surface 12.
Specifically, the spacer 40 is made of a material having a high dielectric constant, and the thickness 41 of the spacer 40 should be less than 0.15 λ, λ being the wavelength of the signal radiated by the yagi antenna 100.
In particular, the magnetic wall formed by the spacer sheet 40 serves to transfer energy and to keep the individual dielectric resonators 30 from being affected by coupling. The magnetic dipole is used to radiate electromagnetic waves into space.
In particular, the balun 25 may be "convex" shaped; one end of the balun 25 is a closed end 251, and the other end is an open end 252; wherein the two connection portions are located at the open end 252 of the balun 25; the closed end 251 of the balun 25 is connected to the microstrip 24.
In particular, the balun 25 is a balun for converting the radiation signal into a differential transmission, so that the radiation signal is converted between balanced and unbalanced or impedance transformed.
Specifically, the reflector 21 is configured to reflect electromagnetic waves radiated in a direction toward which the reflector 21 is close, so as to enhance directivity of the yagi antenna 100 and reduce interference of spatial noise on the yagi antenna 100.
The present invention also provides an embodiment of a communication device, where the communication device includes the yagi antenna 100 described above, and the structure and the function of the yagi antenna 100 can be referred to the above embodiment, which is not described herein in detail. Wherein the communication device may be a radio receiver or a transmitter.
Generally, yagi antennas are generally composed of two parts, a main element and an auxiliary element; wherein, the principal element is generally made of metal, is linear or planar and is used for receiving or transmitting electromagnetic waves; the auxiliary elements are special metal strips which are arranged around the main element and have a certain distance and angle relation with the main element.
In general, the main element is the main working part of the yagi antenna and is generally divided into a driver and a reflector; wherein the driver is typically comprised of an elongated metal strip for receiving or transmitting electromagnetic waves; the reflector is generally composed of a metal strip having a length slightly longer than that of the driver for reflecting electromagnetic waves received or emitted by the driver.
Generally, the auxiliary element is used for forming a directional radiation mode on two sides of the main element, and is generally composed of a plurality of metal strips, is arranged on one side or two sides of the main element, and has a certain distance and angle relation with the main element; the optimized design of parameters such as the number, the length, the distance, the angle and the like of the auxiliary elements can enable the yagi antenna to achieve higher gain and better directivity characteristic.
In general, in order to transmit electromagnetic waves received or transmitted by the yagi antenna to the communication device, it is generally necessary to connect between the yagi antenna and the communication device by a cable; one end of the cable is connected with the yagi antenna, and the other end of the cable is connected with the communication equipment.
Specifically, the magnetic dipole TE111 mode is an oscillation mode in the dielectric resonator 30, and is also a form of electromagnetic wave propagation; wherein TE represents only transverse magnetic waves (Transverse Magnetic) and no longitudinal Electric waves (Electric) in the electromagnetic field; 111 indicates that in the cross section of the dielectric resonator 30, the magnetic field oscillates in one direction and oscillates by an integer multiple of the wavelength of one electric wave.
Specifically, the dielectric resonator 30 (Dielectric Resonator) is a device that generates a resonance phenomenon by oscillation of electromagnetic waves inside a dielectric material; is usually made of high dielectric constant ceramic, quartz and other materials; the working principle of the dielectric resonator 30 is based on the characteristics of high dielectric constant, low conductivity, dielectric polarity, dielectric polarization and the like of dielectric materials, and when one end face is fully exposed in free space and the other end face is connected with a microwave guiding path through an electrode, resonance phenomenon occurs between two ends of the dielectric resonator 30;
specifically, when external electromagnetic waves interact with the dielectric resonator 30, the electromagnetic waves gradually propagate along the electric field and magnetic field distribution in the dielectric resonator 30, and the electric field and magnetic field energy in the propagation process is accumulated and dissipated in a large amount in the dielectric resonator 30 due to the dielectric constant of the dielectric material being higher than that of external air or vacuum, so that a resonance effect is finally formed.
In summary, according to the yagi antenna and the communication device provided by the embodiments of the present invention, by adding a plurality of dielectric resonators having a TE111 oscillation mode and a dielectric resonator array formed by the dielectric resonators and the dielectric resonators, the spacing distance between the dielectric resonators is reduced, so that the overall size of the antenna is effectively reduced and the miniaturization degree of the yagi antenna is improved on the premise that the radiation performance is kept unchanged.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A yagi antenna, comprising:
a substrate; the substrate has opposite first and second surfaces;
an antenna main body; the antenna main body is arranged on the first surface of the substrate and comprises a reflector and a driver;
a plurality of dielectric resonators; the dielectric resonators are arranged along the axis direction of the substrate to form a dielectric resonator array;
and a separation sheet is arranged between two adjacent dielectric resonators, and the dielectric resonator array is positioned on the first surface of the substrate and adjacent to the driver.
2. The yagi antenna of claim 1, wherein the oscillation mode of the dielectric resonator is a magnetic dipole TE111 mode.
3. The yagi antenna of claim 1 wherein said spacer tab is abutted against said adjacent dielectric resonators for forming a magnetic wall between adjacent two of said dielectric resonators.
4. The yagi antenna of claim 1, wherein the antenna body further comprises:
a signal column; the signal column is arranged at one end of the substrate far away from the dielectric resonator array;
a microstrip; the microstrip is arranged on the first surface of the substrate and is connected with the signal column and the driver.
5. The yagi antenna of claim 1 or 4, wherein the signal post extends through the substrate, having a first end and a second end remote from each other;
the first end part is positioned on the first surface and connected with the microstrip; the second end is located on the second surface.
6. The yagi antenna of claim 4, wherein the antenna body further comprises:
and the balun is arranged on the first surface of the substrate and is positioned between the microstrip and the driver.
7. The yagi antenna of claim 6, wherein the driver is comprised of a strip-shaped first metal strip and a second metal strip; the first metal strip and the second metal strip are arranged on the first surface of the substrate side by side and are respectively connected with the two connecting parts of the balun.
8. The yagi antenna of claim 7, wherein the reflector consists of a strip of third and fourth metal strips;
the third metal strip and the fourth metal strip are arranged side by side on the first surface of the substrate between the driver and the balun.
9. The yagi antenna of claim 8, wherein the reflector is a first predetermined distance from the driver; the dielectric resonator array has a second predetermined distance from the drive.
10. A communication device, comprising: the yagi antenna of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310715347.3A CN116646741A (en) | 2023-06-15 | 2023-06-15 | Yagi antenna and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310715347.3A CN116646741A (en) | 2023-06-15 | 2023-06-15 | Yagi antenna and communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116646741A true CN116646741A (en) | 2023-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310715347.3A Pending CN116646741A (en) | 2023-06-15 | 2023-06-15 | Yagi antenna and communication equipment |
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| Country | Link |
|---|---|
| CN (1) | CN116646741A (en) |
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2023
- 2023-06-15 CN CN202310715347.3A patent/CN116646741A/en active Pending
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