CN117353006A - Ground radiation antenna and communication device - Google Patents
Ground radiation antenna and communication device Download PDFInfo
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- CN117353006A CN117353006A CN202311427474.XA CN202311427474A CN117353006A CN 117353006 A CN117353006 A CN 117353006A CN 202311427474 A CN202311427474 A CN 202311427474A CN 117353006 A CN117353006 A CN 117353006A
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- 238000004891 communication Methods 0.000 title claims abstract description 32
- 230000005855 radiation Effects 0.000 title abstract description 49
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 9
- 210000001787 dendrite Anatomy 0.000 description 9
- 238000004088 simulation Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- PEZNEXFPRSOYPL-UHFFFAOYSA-N (bis(trifluoroacetoxy)iodo)benzene Chemical compound FC(F)(F)C(=O)OI(OC(=O)C(F)(F)F)C1=CC=CC=C1 PEZNEXFPRSOYPL-UHFFFAOYSA-N 0.000 description 2
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- 238000007639 printing Methods 0.000 description 1
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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
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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
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Abstract
The application belongs to the technical field of communication equipment, and provides a ground radiation antenna and communication equipment. The dielectric plate comprises a substrate and a reference stratum, wherein a hollowed-out groove is formed in the reference stratum, one side, close to the edge of the reference stratum, of the hollowed-out groove forms an opening, and the hollowed-out groove is provided with a first side edge, a second side edge and a third side edge. The main branch section is arranged on the substrate, is positioned in the digging groove, comprises a first sub main branch section which is arranged close to the first side edge and forms a first gap with the first side edge, a third sub main branch section which is arranged close to the third side edge and forms a second gap with the third side edge, and a second sub main branch section which is connected between the first sub main branch section and the third sub main branch section, wherein the electric length of the main branch section is less than one quarter of the wavelength of a radio frequency signal. The matching network is arranged on the substrate in the hollowed-out groove and used for adjusting the impedance of the feeding point of the main branch. The ground radiation antenna provided by the application has good performance while achieving miniaturization.
Description
Technical Field
The application relates to the technical field of communication equipment, in particular to a ground radiation antenna and communication equipment.
Background
As communication technology advances, more antennas need to be installed inside the communication device. In the prior art, in order to install more antennas in a communication device, the following methods are generally adopted. One approach is to increase the overall size of the communication device, and to expand the design space of the antennas from a physical level to ensure that the antennas maintain good performance even if a large number of antennas are installed, however, increasing the size of the communication device affects the miniaturized design of the communication device. Another approach is to use on-board dipole antennas or inverted-F antennas and arrange some of them on the motherboard of the communication device to increase the layout space of the antenna, however, arranging the antenna on the motherboard would occupy the space of the motherboard and would also cause the horizontal omni-directional coverage of the antenna to be difficult to achieve, affecting the performance of the antenna. There is also a method of miniaturizing the on-board dipole antenna or the inverted-F antenna, however, miniaturizing the on-board dipole antenna or the inverted-F antenna tends to cause a decrease in efficiency of the antenna to affect the performance of the antenna.
It can be seen that although the above method can install more antennas inside the communication device, each method has certain limitations and disadvantages, and cannot achieve both the miniaturization design of the communication device and the performance of the antennas, and there is still a need to design a small antenna with good performance to solve the problem.
Disclosure of Invention
An objective of the embodiments of the present application is to provide a ground radiation antenna and a communication device, so as to solve the technical problem that the communication device in the prior art cannot consider the miniaturization design of the device and the performance of the antenna, and a small antenna with good performance needs to be designed.
In order to achieve the above object, the present application provides a ground radiation antenna, including:
the dielectric plate comprises a substrate and a reference stratum arranged on the substrate, wherein a hollowed-out groove is formed in the reference stratum, one side, close to the edge of the reference stratum, of the hollowed-out groove is opened to form an opening, the hollowed-out groove is provided with a first side, a second side and a third side which are sequentially connected, and the first side and the third side are oppositely arranged;
the main branch is arranged on the substrate and is positioned in the hollowing groove, the main branch comprises a first sub main branch, a second sub main branch and a third sub main branch, the first sub main branch is close to the first side and forms a first gap with the first side, the third sub main branch is close to the third side and forms a second gap with the third side, two ends of the second sub main branch are respectively connected with the first sub main branch and one end of the third sub main branch close to the opening, one end of the first sub main branch away from the second sub main branch is connected with the reference stratum feed, and the electric length of the main branch is smaller than one fourth of the wavelength of a radio frequency signal;
and the matching network is arranged on the substrate and positioned in the hollowed groove and is used for adjusting the impedance of the feeding point of the main branch.
In one embodiment, at least two of the first, second, and third sub-main branches have different widths.
In one embodiment, the first sub-main branch, the second sub-main branch and the third sub-main branch are vertically connected in sequence.
In one embodiment, the matching network includes an auxiliary branch, the auxiliary branch includes a first sub-auxiliary branch, one end of the first sub-auxiliary branch is electrically connected with the feeding point of the main branch, the first sub-auxiliary branch is located between the second sub-main branch and the second side and forms a third gap between the second side, and the electrical length of the auxiliary branch is less than one quarter of the wavelength of the radio frequency signal.
In one embodiment, the secondary branches further include a second sub-secondary branch and a third sub-secondary branch, the first sub-secondary branch, the second sub-secondary branch and the third sub-secondary branch are sequentially connected, the second sub-secondary branch is located between the first sub-primary branch and the third sub-primary branch, and the third sub-secondary branch is located between the first sub-secondary branch and the second sub-primary branch.
In one embodiment, at least two of the first sub-branch, the second sub-branch, and the third sub-branch have different widths.
In one embodiment, the first sub-branch, the second sub-branch and the third sub-branch are sequentially and vertically connected.
In one embodiment, the matching network includes a capacitor, one end of the capacitor is electrically connected to the feeding point of the main branch, and the other end of the capacitor is electrically connected to the reference stratum.
In one embodiment, the separation between the midpoint of the hollowed out slot in the length direction and the midpoint of the reference formation in the length direction is less than or equal to one-twelfth of the wavelength of the radio frequency signal.
In one embodiment, the length of the hollow groove is 0.09-0.11 times of the wavelength of the radio frequency signal, and the width of the hollow groove is 0.05-0.07 times of the wavelength of the radio frequency signal.
In one embodiment, the length of the dielectric plate is 1.2-1.3 times of the wavelength of the radio frequency signal, and the width of the dielectric plate is 0.8-0.9 times of the wavelength of the radio frequency signal; the thickness of the dielectric plate is 0.01-0.02 times of the wavelength of the radio frequency signal.
To achieve the above object, the present application further provides a communication device including the above ground radiating antenna.
The beneficial effect that this application provided ground radiation antenna and communication device lies in: compared with the prior art, the ground radiation antenna provided by the application is characterized in that the reference stratum of the dielectric plate is provided with the hollowed groove based on the characteristic mode theory, the hollowed groove is internally provided with the main branch, the electric length of the main branch is smaller than one fourth of the wavelength of a radio frequency signal, a first gap is formed between the first sub main branch of the main branch and the first side edge of the hollowed groove, a second gap is formed between the third sub main branch of the main branch and the third side edge of the hollowed groove, the main branch and the reference stratum form an open loop, loop currents are formed on the main branch and the reference stratum and can be equivalent to an inductor, so that a full-wavelength resonance mode can be constructed on the reference stratum, after one end of the first sub main branch far away from the second sub main branch is fed, the main branch is used as an excitation source of the stratum, the reference radiation can be effectively excited, and the size of the ground radiation antenna can be very small, and higher efficiency can be kept; and, the ground radiation antenna that this application provided still sets up the matching network that is used for adjusting the impedance of the feed point department of main branch in the hollowing inslot, is favorable to further promoting the efficiency of antenna, and in addition, the ground radiation antenna that this application provided through the position of changing hollowing out the groove on consulting the stratum, can make the pattern of ground radiation antenna controllable, makes ground radiation antenna obtain better omnidirectional radiation performance. Therefore, the application provides the small-sized ground radiation antenna with high efficiency and better omnidirectional radiation performance, and the antenna is beneficial to realizing the miniaturization of the communication equipment when being installed and used in the communication equipment, keeps the good performance of the antenna and can be used for considering the miniaturization design of the equipment and the performance of the antenna.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a ground radiation antenna according to an embodiment of the present application;
fig. 2 is an enlarged view at a of a schematic structural diagram of the ground radiating antenna shown in fig. 1;
fig. 3 is a schematic structural diagram of another ground radiating antenna according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of another ground radiating antenna according to an embodiment of the present application;
fig. 5 is a return loss plot of the ground radiating antenna shown in fig. 1;
FIG. 6 is a simulated efficiency plot of the ground radiating antenna shown in FIG. 1;
fig. 7 is a horizontal omnidirectional diagram of the ground radiating antenna shown in fig. 1;
fig. 8 is a pattern current diagram of the ground radiating antenna shown in fig. 1;
fig. 9 is a pattern current diagram of the ground radiating antenna shown in fig. 3;
fig. 10 is a pattern current diagram of the ground radiating antenna shown in fig. 4;
fig. 11 is a pattern of the ground radiating antenna shown in fig. 1, 3 and 4.
Wherein, each reference sign in the figure:
100-dielectric plate; 110-a substrate; 120-reference formation; 121-digging a hollow groove; 1211-a first side; 1212-a second side; 1213-third side; 1201-first gap; 1202-a second gap; 1203-third gap;
200-main branches; 210-a first sub-major branch; 220-a second sub-major branch; 230-a third child major branch;
300-matching network; 310-secondary branches; 311-first sub-branch; 312-second sub-knots; 313-third sub-node.
400-feeding points;
500-ground point.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 and 2, a description will be given of a ground radiation antenna provided in an embodiment of the present application. The ground radiating antenna includes a dielectric plate 100, a main stub 200, and a matching network 300.
The dielectric plate 100 includes a substrate 110 and a reference stratum 120 disposed on the substrate 110, a hollowed out groove 121 is disposed on the reference stratum 120, one side of the hollowed out groove 121 near the edge of the reference stratum 120 is opened to form an opening, the hollowed out groove 121 has a first side 1211, a second side 1212 and a third side 1213 connected in sequence, and the first side 1211 and the third side 1213 are disposed opposite to each other.
Specifically, the substrate 110 of the dielectric board 100 may be provided as an FR4 board. The reference layer 120 of the dielectric plate 100 may be provided as a copper-clad layer. The dielectric sheet 100 may be provided in a rectangular, elliptical, or other shape, the length of the dielectric sheet 100 (the dimension of the dielectric sheet 100 in the illustrated Y-direction) may be provided in a range of 1.2-1.3 times the wavelength of the radio frequency signal, the width of the dielectric sheet 100 (the dimension of the dielectric sheet 100 in the illustrated X-direction) may be provided in a range of 0.8-0.9 times the wavelength of the radio frequency signal, and the thickness of the dielectric sheet 100 may be provided in a range of 0.01-0.02 times the wavelength of the radio frequency signal, although the dielectric sheet 100 may be provided in other shapes and sizes. Illustratively, the dielectric plate 100 is set to be rectangular, the length of which is set to be 1.25 times the wavelength of the radio frequency signal, the width of the dielectric plate 100 is set to be 0.85 times the wavelength of the radio frequency signal, and the thickness of the dielectric plate 100 is set to be 0.015 times the wavelength of the radio frequency signal.
Specifically, the hollowed-out groove 121 is provided at the edge of the copper-clad layer, in other words, the hollowed-out groove 121 forms a notch at the edge of the copper-clad layer. The first side 1211, the second side 1212, and the third side 1213 of the hollowed out groove 121 may extend along a straight line, respectively, and an angle between the first side 1211 and the second side 1212 may be set to be 70 ° -120 °, such as 70 °, 80 °, 90 °, 100 °, 110 °, etc., and an angle between the second side 1212 and the third side 1213 may be set to be 70 ° -120 °, such as 70 °, 80 °, 90 °, 100 °, 110 °, etc., and an angle between the first side 1211 and the second side 1212 is set to be 90 °, and an angle between the second side 1212 and the third side 1213 is set to be 90 °, i.e., the hollowed out groove 121 is a rectangular groove, and the hollowed out groove 121 is disposed at a middle portion of one side of the medium sheet 100. The shape and the positional relationship of the hollowed-out groove 121 on the copper-clad layer can be adjusted according to the specific situation, and the present embodiment is not limited thereto.
Illustratively, the length of the hollowed-out groove 121 may be set to 0.09-0.11 times the wavelength of the radio frequency signal, the width of the hollowed-out groove 121 may be set to 0.05-0.07 times the wavelength of the radio frequency signal, preferably, the length of the hollowed-out groove 121 is set to 0.1 times the wavelength of the radio frequency signal, and the width of the hollowed-out groove 121 is set to 0.06 times the wavelength of the radio frequency signal.
The main branch 200 is disposed on the substrate 110 and is located in the hollowed-out groove 121. The main dendrites 200 include a first sub-main dendrite 210, a second sub-main dendrite 220, and a third sub-main dendrite 230. The electrical length of the main branch 200 is less than one quarter of the wavelength of the radio frequency signal. Wherein, the first sub-main branch 210 is disposed near the first side 1211 and forms a first gap 1201 with the first side 1211, the third sub-main branch 230 is disposed near the third side 1213 and forms a second gap 1202 with the third side 1213, and two ends of the second sub-main branch 220 are respectively connected to one end of the first sub-main branch 210 and one end of the third sub-main branch 230 near the opening. The end of the first sub-main branch 210 far away from the second sub-main branch 220 is in feed connection with the reference stratum 120, so that an open loop is formed between the main branch 200 and the reference stratum 120, loop current is formed on the two, which can be equivalent to inductance, and a full-wavelength resonance mode can be constructed on the reference stratum 120.
Specifically, the end of the first sub-main branch 210 away from the second sub-main branch 220 is provided with a feeding point 400, and the reference layer 120 is provided with a grounding point 500. The main branch 200 may be fed by a coaxial line, or may be fed by a microstrip line, a coplanar waveguide line, or the like, to the reference layer 120.
Specifically, in one possible implementation, the first sub-main branch 210, the second sub-main branch 220, and the third sub-main branch 230 all extend along a straight line, and an included angle between the first sub-main branch 210 and the second sub-main branch 220 may be set to be between 70 ° and 120 °, such as 70 °, 80 °, 90 °, 100 °, 110 °, and so on; the angle between the second sub-main branch 220 and the third sub-main branch 230 may be set to be 70 ° -120 °, such as 70 °, 80 °, 90 °, 100 °, 110 °, etc., preferably the angle between the first sub-main branch 210 and the second sub-main branch 220 is set to be 90 °, the angle between the second sub-main branch 220 and the third sub-main branch 230 is set to be 90 °, and the main branch 200 is C-shaped as a whole.
In other possible implementations, the first sub-main branch 210 and the third sub-main branch 230 may also be configured to extend along a straight line, and the second sub-main branch 220 may be configured to extend in a serpentine shape, so that the length of the second sub-main branch 220 may be set longer, which is beneficial to reducing the area occupied by the main branch 200 on the substrate 110, and thus, is beneficial to miniaturization of the antenna.
The matching network 300 is disposed on the substrate 110 and in the hollowed-out groove 121, for adjusting the impedance of the feeding point 400 of the main branch 200.
Specifically, the matching network 300 is used for adjusting impedance matching and controlling the resonant frequency, and the matching network 300 has various possible forms, in one possible implementation manner, the matching network 300 may be configured as a secondary branch 310 described below, the secondary branch 310 includes a first sub-secondary branch 311, the length of the first sub-secondary branch 311 is smaller than one quarter of the wavelength of the radio frequency signal, one end of the first sub-secondary branch 311 is electrically connected with the first sub-main branch 210, the first sub-secondary branch 311 is parallel to and spaced from the second side 1212 of the hollowing 121, in this case, the first sub-secondary branch 311 is parallel to and close to the reference stratum 120, so as to form an open-circuit transmission line, the port impedance is available according to the transmission line impedance equation, the port impedance is capacitive, an equivalent capacitance can be formed, and the equivalent capacitance and the equivalent inductance formed by the main branch 200 together form an LC resonant circuit, where the reference stratum 120 can construct a resonant mode with a full wavelength, and the resonant mode can be effectively excited, so that the antenna 120 is resonant at a set frequency band, and the antenna has a high efficiency while achieving a small antenna efficiency.
Compared with the prior art, the ground radiation antenna and the communication device provided in this embodiment, based on the characteristic mode theory, the hollowed slot 121 is formed on the reference stratum 120 of the dielectric plate 100, and the hollowed slot 121 is internally provided with the main branch 200, the electrical length of the main branch 200 is smaller than one fourth of the wavelength of the radio frequency signal, a first gap 1201 is formed between the first sub-main branch 210 of the main branch 200 and the first side 1211 of the hollowed slot 121, a second gap 1202 is formed between the third sub-main branch 230 of the main branch 200 and the third side 1213 of the hollowed slot 121, and a split ring is formed between the main branch 200 and the reference stratum 120, and the split ring is formed on both, which can be equivalent to an inductance, so designed, a resonant mode with full wavelength can be constructed on the reference stratum 120, after one end of the first sub-main branch 210, which is far from the second sub-main branch 220, is fed, the main branch 200 can be effectively excited to radiate from the reference stratum 120, so that the ground radiation antenna size can be very small, and high efficiency can be maintained; in addition, the ground radiation antenna provided by the application is further provided with the matching network for adjusting the impedance of the feeding point 400 of the main branch node 200 in the hollowed-out groove 121, so that the efficiency of the antenna is improved. Therefore, the ground radiation antenna with high efficiency and better omnidirectional radiation performance is provided, and is beneficial to realizing miniaturization of the communication equipment when being installed and used in the communication equipment, maintaining good performance of the antenna and considering miniaturization design of the equipment and performance of the antenna.
In another embodiment of the present application, referring to fig. 2, at least two of the first sub-main branch 210, the second sub-main branch 220, and the third sub-main branch 230 have different widths.
It will be appreciated that the width direction of the first sub-main branch 210 is perpendicular to the extending direction of the first sub-main branch 210, and similarly, the width direction of the second sub-main branch 220 is perpendicular to the extending direction of the second sub-main branch 220, and the width direction of the third sub-main branch 230 is perpendicular to the extending direction of the third sub-main branch 230.
In one possible implementation, the widths of the first sub-main branch 210, the second sub-main branch 220, and the third sub-main branch 230 are all different. In another possible implementation, the widths of two of the first sub-main branch 210, the second sub-main branch 220, and the third sub-main branch 230 are the same, and the widths of the other are different, for example, the widths of the first sub-main branch 210 and the second sub-main branch 220 are the same, and the width of the third sub-main branch 230 is not equal to the widths of the first sub-main branch 210 and the second sub-main branch 220.
The width of at least two of the first sub-main branch 210, the second sub-main branch 220 and the third sub-main branch 230 is set to be different, so that impedance adjustment can be facilitated, and the ground radiating antenna can have wider working bandwidth by adjusting the widths of the different sub-main branches, so that the ground radiating antenna has wider signal coverage.
In another embodiment of the present application, referring to fig. 2, the matching network 300 includes a secondary branch 310, the secondary branch 310 includes a first sub-secondary branch 311, one end of the first sub-secondary branch 311 is electrically connected to the feeding point 400 of the main branch 200, the first sub-secondary branch 311 is located between the second sub-main branch 220 and the second side 1212 and forms a third gap 1203 between the second side 1212, and an electrical length of the secondary branch 310 is less than one quarter of a wavelength of the radio frequency signal.
According to the ground radiation antenna provided by the embodiment, the matching network 300 is set to be the secondary branch 310, so that the impedance matching of the antenna can be further improved, the radiation performance of the antenna is optimized, and the transmission efficiency of the antenna is further improved; and the secondary branches 310 can be directly arranged on the substrate 110 in a printing manner, which is beneficial to reducing the design cost of the antenna, improving the consistency and stability of the antenna and reducing the volume of the antenna.
In another embodiment of the present application, referring to fig. 2, the secondary branch 310 further includes a second secondary sub-branch 312 and a third secondary sub-branch 313, and the first secondary sub-branch 311, the second secondary sub-branch 312 and the third secondary sub-branch 313 are sequentially connected. The second sub-branch 312 is located between the first sub-main branch 210 and the third sub-main branch 230, and the third sub-branch 313 is located between the first sub-branch 311 and the second sub-main branch 220.
Specifically, in one possible implementation, the first sub-branch 311, the second sub-branch 312, and the third sub-branch 313 all extend along a straight line, and an included angle between the first sub-branch 311 and the second sub-branch 312 may be set to be between 70 ° and 120 °, such as 70 °, 80 °, 90 °, 100 °, 110 °, and so on; the angle between the second 312 and third 313 sub-branches may be set between 70 deg. -120 deg., such as 70 deg., 80 deg., 90 deg., 100 deg., 110 deg., etc., preferably, the angle between the first sub-branch 311 and the second sub-branch 312 is set to 90 °, the angle between the second sub-branch 312 and the third sub-branch 313 is set to 90 °, and the sub-branch 310 is n-type as a whole.
In other possible implementations, the first sub-branch 311 may also be configured to extend in a straight line, and the second sub-branch 312 and the third sub-branch 313 may each be configured to extend in a serpentine shape, so configured, the lengths of the second sub-branch 312 and the third sub-branch 313 may be set longer, which is advantageous to reduce the area occupied by the sub-branch 310 on the substrate 110 while ensuring that the length of the sub-branch 310 is sufficient, thereby facilitating miniaturization of the antenna.
The ground radiation antenna provided in this embodiment sets the secondary branch 310 to be a first sub-secondary branch 311, a second sub-secondary branch 312 and a third sub-secondary branch 313 which are sequentially connected, sets the second sub-secondary branch 312 between the first sub-main branch 210 and the third sub-main branch 230, and sets the third sub-secondary branch 313 between the first sub-secondary branch 311 and the second sub-main branch 220, so that the three are in a bent shape, which is beneficial to reducing the area occupied by the secondary branch 310 on the substrate 110, and further beneficial to miniaturization of the antenna.
In another embodiment of the present application, referring to fig. 2, at least two of the first sub-branch 311, the second sub-branch 312, and the third sub-branch 313 have different widths.
It will be appreciated that the width direction of the first sub-branch 311 is perpendicular to the extending direction of the first sub-branch 311, and similarly, the width direction of the second sub-branch 312 is perpendicular to the extending direction of the second sub-branch 312, and the width direction of the third sub-branch 313 is perpendicular to the extending direction of the third sub-branch 313.
In one possible implementation of the present invention, the widths of the first sub-branch 311, the second sub-branch 312, and the third sub-branch 313 are all different. In another possible implementation, two of the first sub-branch 311, the second sub-branch 312, and the third sub-branch 313 have the same width, the other has a different width, for example, the first sub-branch 311 and the second sub-branch 312 have the same width, the width of the third sub-branch 313 is not equal to the widths of the first sub-branch 311 and the second sub-branch 312.
The present embodiment provides a ground radiating antenna, the widths of at least two of the first sub-branch 311, the second sub-branch 312 and the third sub-branch 313 are set to be different, it is possible to facilitate the adjustment of the impedance, by adjusting the widths of different sub-branches, the ground radiation antenna can have wider working bandwidth, and further has wider signal coverage range.
In another embodiment of the present application, the matching network 300 includes a capacitor, one end of which is electrically connected to the feeding point 400 of the main branch 200, and the other end of which is electrically connected to the reference layer 120. The drawings of this case are not shown.
According to the ground radiation antenna provided by the embodiment, the matching network 300 is set to be a capacitor, so that the impedance matching of the antenna can be improved, the radiation performance of the antenna is optimized, and the transmission efficiency of the antenna is further improved.
In another embodiment of the present application, referring to FIG. 2, the separation between the midpoint of the hollowed out trench 121 in the length direction and the midpoint of the reference formation 120 in the length direction is less than or equal to one-tenth of the wavelength of the radio frequency signal.
Specifically, the length direction of the hollowed-out groove 121 and the length direction of the reference stratum 120 are both the Y direction as shown. The distance between the midpoint of the length direction of the hollowed out groove 121 and the midpoint of the length direction of the reference stratum 120 may be equal to one-twelfth of the wavelength of the radio frequency signal, one-fourteen of the wavelength of the radio frequency signal, one-sixteenth of the wavelength of the radio frequency signal, etc., and the midpoint of the length direction of the hollowed out groove 121 may be coincident with the midpoint of the length direction of the reference stratum 120, i.e., the hollowed out groove 121 is centrally disposed in the length direction of the reference stratum 120.
The ground radiation antenna provided in this embodiment limits the distance between the midpoint of the hollowed groove 121 in the length direction and the midpoint of the reference stratum 120 in the length direction to be less than one-twelfth of the wavelength of the radio frequency signal, so that the ground radiation antenna can better realize horizontal omnidirectional radiation, reduce out-of-roundness, furthest reduce the influence of the substrate 110 on an omnidirectional pattern, and is very suitable for products requiring horizontal omnidirectional radiation coverage, such as WIFI.
Referring to fig. 1 and 2, in order to better explain the principles and effects of the present application, a detailed description will be made of a structure of a ground radiating antenna, and a simulation is performed on the ground radiating antenna. The ground radiating antenna includes a dielectric plate 100, a main stub 200, and a matching network 300.
The dielectric plate 100 includes a substrate 110 and a reference stratum 120 disposed on the substrate 110, the substrate 110 is a rectangular FR4 board, the reference stratum 120 is a copper-clad layer, the length of the dielectric plate 100 is set to 1.1 times the wavelength of the radio frequency signal, the width of the dielectric plate 100 is set to 0.85 times the wavelength of the radio frequency signal, and the thickness of the dielectric plate 100 is set to 0.015 times the wavelength of the radio frequency signal. The reference layer 120 is provided with a rectangular hollowed-out groove 121, the hollowed-out groove 121 is positioned at the edge of one side of the reference layer 120, and the distance between the midpoint of the hollowed-out groove 121 in the length direction and the midpoint of the dielectric plate 100 in the length direction is less than one twelfth of the wavelength of the radio frequency signal. The side of the hollowed out groove 121 near the edge of the reference stratum 120 is opened to form an opening, and the hollowed out groove 121 is provided with a first side 1211, a second side 1212 and a third side 1213 which are vertically connected in sequence, wherein the first side 1211 and the third side 1213 are oppositely arranged. The length of the hollowed-out groove 121 is set to 0.1 times the wavelength of the radio frequency signal, and the width of the hollowed-out groove 121 is set to 0.06 times the wavelength of the radio frequency signal.
The main branch 200 is disposed on the substrate 110 and is located in the hollowed-out groove 121. The main dendrite 200 includes a first sub main dendrite 210, a second sub main dendrite 220, and a third sub main dendrite 230 which are vertically connected in order, and the main dendrite 200 is integrally C-shaped. Wherein, the first sub-main branch 210 is disposed near the first side 1211 and forms a first gap 1201 with the first side 1211, the third sub-main branch 230 is disposed near the third side 1213 and forms a second gap 1202 with the third side 1213, and two ends of the second sub-main branch 220 are respectively connected to one end of the first sub-main branch 210 near the opening and one end of the third sub-main branch 230 near the opening. The end of the first sub-main branch 210 remote from the second sub-main branch 220 is in feed connection with the reference formation 120, the electrical length of the main branch 200 being less than one quarter of the wavelength of the radio frequency signal.
The matching network 300 is disposed on the substrate 110 and is located in the hollowed out groove 121. The matching network 300 is configured as an auxiliary branch 310, and the auxiliary branch 310 includes a first sub-auxiliary branch 311, a second sub-auxiliary branch 312, and a third sub-auxiliary branch 313 which are sequentially and vertically connected, and the auxiliary branch 310 is overall n-shaped. One end of the first sub-branch 311 is electrically connected to the feeding point 400 of the main branch 200, the first sub-branch 311 is located between the second sub-main branch 220 and the second side 1212 and forms a third gap 1203 with the second side 1212, the second sub-branch 312 is located between the first sub-main branch 210 and the third sub-main branch 230, and the third sub-branch 313 is located between the first sub-branch 311 and the second sub-main branch 220. The electrical length of the secondary branch 310 is less than one-fourth of the wavelength of the radio frequency signal.
In the prior art, the length of a conventional PIFA antenna is at least 0.3 times of the wavelength of a radio frequency signal, and the width is at least 0.1 times of the wavelength of the radio frequency signal; conventional dipole antennas have a length of at least 0.45 times the wavelength of the radio frequency signal and a width of at least 0.15 times the wavelength of the radio frequency signal. The occupation area of the hollowed-out groove 121 of the ground radiation antenna provided by the embodiment on the reference stratum 120 is reduced by more than 70% compared with the occupation area of the conventional PIFA antenna and dipole antenna, which is very beneficial to the miniaturization design of communication equipment.
Fig. 5 to 8 and 11 show results of simulation of the ground radiating antenna having the above-described structure.
From the return loss diagram of the ground radiation antenna shown in fig. 5, it can be seen that the return loss of the ground radiation antenna provided by this embodiment is small, and has better impedance matching.
From the simulation efficiency chart of the ground radiation antenna shown in fig. 6, it can be seen that the simulation efficiency of the ground radiation antenna provided by the embodiment is greater than 90%, and the simulation efficiency is higher.
From the horizontal omnidirectional diagram of the ground radiation antenna shown in fig. 7, it can be seen that the ground radiation antenna provided in this embodiment can realize horizontal omnidirectional radiation, and the out-of-roundness is less than 3dB, so that the influence of the substrate 110 on the omnidirectional pattern is greatly reduced, and the ground radiation antenna is very suitable for being applied to communication devices such as WiFi which need to be covered by horizontal omnidirectional radiation.
Referring to fig. 3 and 4 in combination, fig. 3 and 4 show two other types of ground radiating antennas, and the main difference between the ground radiating antennas shown in fig. 1, 3 and 4 is that the position of the hollowed-out slot 121 on the reference stratum 120 is different. Fig. 8 to 10 are schematic current diagrams of the ground radiating antenna shown in fig. 1, 3 and 4, and fig. 11 shows the patterns of the ground radiating antenna shown in fig. 1, 3 and 4, respectively, in which the patterns of the ground radiating antenna are shown in fig. 1, 3 and 4, and it can be seen that the ground radiating antenna radiates mainly through a resonant mode excited by a reference stratum 120 to have a full wavelength, and changing the position of the hollowed-out slot 121 on the reference stratum 120 can change the distribution position of the resonant current, so as to realize controllable pattern regulation and control.
Therefore, the ground radiation antenna with small size, high efficiency, relatively easy regulation and control of the directional diagram and relatively excellent omnidirectional radiation performance is provided, and when the ground radiation antenna is installed and used in communication equipment, miniaturization of the communication equipment is facilitated, good performance of the antenna is maintained, and miniaturization design of the equipment and performance of the antenna can be considered.
The embodiment of the application also provides communication equipment, which comprises the ground radiation antenna.
Specifically, the communication device provided in this embodiment may be a mobile phone, a tablet, a computer, a base station, or other devices, which is not limited in this embodiment.
Since the above-mentioned communication device adopts all embodiments of the above-mentioned ground radiating antenna, it has at least all the advantageous effects of the above-mentioned embodiments, and will not be described in detail herein.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (10)
1. A ground radiating antenna, characterized in that it comprises:
the dielectric plate comprises a substrate and a reference stratum arranged on the substrate, wherein a hollowed-out groove is formed in the reference stratum, one side, close to the edge of the reference stratum, of the hollowed-out groove is opened to form an opening, the hollowed-out groove is provided with a first side, a second side and a third side which are sequentially connected, and the first side and the third side are oppositely arranged;
the main branch is arranged on the substrate and is positioned in the hollowing groove, the main branch comprises a first sub main branch, a second sub main branch and a third sub main branch, the first sub main branch is close to the first side and forms a first gap with the first side, the third sub main branch is close to the third side and forms a second gap with the third side, two ends of the second sub main branch are respectively connected with the first sub main branch and one end of the third sub main branch close to the opening, one end of the first sub main branch away from the second sub main branch is connected with the reference stratum feed, and the electric length of the main branch is smaller than one fourth of the wavelength of a radio frequency signal;
and the matching network is arranged on the substrate and positioned in the hollowed groove and is used for adjusting the impedance of the feeding point of the main branch.
2. The ground radiating antenna of claim 1, wherein at least two of the first, second, and third sub-main branches differ in width; and/or the first sub-main branch, the second sub-main branch and the third sub-main branch are sequentially and vertically connected.
3. The ground radiating antenna of claim 1, wherein the matching network comprises a secondary branch comprising a first sub-secondary branch having one end electrically connected to a feed point of the main branch, the first sub-secondary branch being located between the second sub-main branch and the second side and forming a third gap therebetween, the secondary branch having an electrical length less than one quarter of a wavelength of the radio frequency signal.
4. A ground radiating antenna according to claim 3, wherein the secondary branches further comprise a second sub-secondary branch and a third sub-secondary branch, the first sub-secondary branch, the second sub-secondary branch and the third sub-secondary branch being connected in sequence, the second sub-secondary branch being located between the first sub-primary branch and the third sub-primary branch, the third sub-secondary branch being located between the first sub-secondary branch and the second sub-primary branch.
5. The ground radiating antenna of claim 4, wherein at least two of the first, second, and third sub-branches differ in width; and/or the first sub-branch, the second sub-branch and the third sub-branch are sequentially and vertically connected.
6. The ground radiating antenna of claim 1, wherein the matching network comprises a capacitor having one end electrically connected to the feed point of the main branch and the other end electrically connected to the reference ground layer.
7. The ground radiating antenna of any one of claims 1-6, wherein a separation between a midpoint of the hollowed out slot in a length direction and a midpoint of the reference formation in a length direction is less than or equal to one-twelfth of a wavelength of the radio frequency signal.
8. The ground radiating antenna of any one of claims 1-6, wherein the length of the hollowed-out slot is 0.09-0.11 times the wavelength of the radio frequency signal, and the width of the hollowed-out slot is 0.05-0.07 times the wavelength of the radio frequency signal.
9. The ground radiating antenna of any one of claims 1-6, wherein the dielectric plate has a length of 1.2-1.3 times the wavelength of the radio frequency signal and a width of 0.8-0.9 times the wavelength of the radio frequency signal; the thickness of the dielectric plate is 0.01-0.02 times of the wavelength of the radio frequency signal.
10. A communication device, characterized in that it comprises a ground radiating antenna according to any of claims 1-9.
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| CN202311427474.XA CN117353006B (en) | 2023-10-28 | 2023-10-28 | Ground radiation antenna and communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN213753059U (en) * | 2021-06-16 | 2021-07-20 | 荣耀终端有限公司 | Multi-frequency low-SAR antenna and electronic equipment |
| CN214625374U (en) * | 2021-04-23 | 2021-11-05 | 新疆大学 | Three-frequency-band MIMO antenna supporting 5G communication |
| US20220407217A1 (en) * | 2019-10-31 | 2022-12-22 | Huawei Technologies Co., Ltd. | Antenna apparatus and electronic device |
| CN115708258A (en) * | 2021-08-20 | 2023-02-21 | 荣耀终端有限公司 | Terminal slot antenna of coupling feed |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220407217A1 (en) * | 2019-10-31 | 2022-12-22 | Huawei Technologies Co., Ltd. | Antenna apparatus and electronic device |
| CN214625374U (en) * | 2021-04-23 | 2021-11-05 | 新疆大学 | Three-frequency-band MIMO antenna supporting 5G communication |
| CN213753059U (en) * | 2021-06-16 | 2021-07-20 | 荣耀终端有限公司 | Multi-frequency low-SAR antenna and electronic equipment |
| CN115708258A (en) * | 2021-08-20 | 2023-02-21 | 荣耀终端有限公司 | Terminal slot antenna of coupling feed |
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