CN111600123B - Super surface antenna - Google Patents
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- CN111600123B CN111600123B CN202010436662.9A CN202010436662A CN111600123B CN 111600123 B CN111600123 B CN 111600123B CN 202010436662 A CN202010436662 A CN 202010436662A CN 111600123 B CN111600123 B CN 111600123B
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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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
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Abstract
The invention provides a super-surface antenna. The super-surface antenna comprises a first substrate, a second substrate, a third substrate, a fourth substrate, a super-surface structure, a radiation patch, a ground plate, a directional differential feed network and a capacitive matching network. The technical scheme includes that two signal output ends of a directional differential feed network are electrically connected with a radiation patch, the directional differential feed network carries out differential feed on the radiation patch through the two signal output ends to enable the radiation patch to generate a directional radiation source, a capacitive matching network is arranged in a second substrate and a third substrate, a grounding plate is arranged between the third substrate and a fourth substrate, the capacitive matching network is connected with the radiation patch to enable the radiation patch to generate an omnidirectional radiation source, a super-surface structure receives the directional radiation source and/or the omnidirectional radiation source, the frequency band width of the directional radiation source and/or the omnidirectional radiation source is widened, and the gain of the directional radiation source and/or the omnidirectional radiation source is increased.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a super-surface antenna.
Background
Antenna diversity is an effective method to improve the quality of the wireless link and the reliability of the reception of the communication. It can effectively suppress multipath fading. In antenna diversity design, pattern diversity has received a wide range of attention and research applications. Different radiation patterns can be achieved due to the pattern diversity performance of the antenna. It is possible to position two or more antenna elements simultaneously, resulting in a smaller overall size of the antenna system.
The existing directional diagram diversity antenna or the directional diagram reconfigurable antenna adopts a mode of two or more feed ports in the same antenna structure, although an omnidirectional radiation pattern and a directional radiation pattern can be realized, the mode is limited by narrow frequency band width and low gain.
Disclosure of Invention
The invention mainly aims to provide a super-surface antenna, and aims to solve the technical problems of narrow frequency band width and low gain of the conventional directional diagram diversity antenna or directional diagram reconfigurable antenna.
In order to achieve the above object, the present invention provides a super-surface antenna, including:
the first substrate, the second substrate, the third substrate and the fourth substrate are sequentially stacked;
a super-surface structure disposed on the first substrate;
a radiation patch disposed on a surface of the second substrate facing the first substrate;
a ground plate disposed on a surface of the third substrate facing the fourth substrate;
the directional differential feed network is arranged on the surface, far away from the third substrate, of the fourth substrate and is used for differentially feeding the super-surface structure to generate a directional radiation source;
a capacitive matching network disposed through the second substrate and the third substrate, the capacitive matching network connecting the radiating patch and the ground plate such that the radiating patch generates an omnidirectional radiation source.
Preferably, the capacitive matching network comprises:
the feeding patch is arranged between the third substrate and the second substrate and is electrically connected with the grounding plate;
the metal column penetrates through the second substrate, and two ends of the metal column are respectively connected with the radiation patch and the feed patch.
Preferably, both ends of the metal post are respectively connected to a central position of the radiation patch and a central position of the feed patch.
Preferably, the capacitive matching network further comprises:
a feed port;
and one end of the probe is connected with the feed port, and the other end of the probe sequentially penetrates through the grounding plate and the third substrate and is connected with the feed patch.
Preferably, the directional differential feed network further comprises:
the two connecting pieces sequentially penetrate through the second substrate, the third substrate, the grounding plate and the fourth substrate, and two ends of each connecting piece are electrically connected with the radiation patch and the directional differential feed network respectively.
Preferably, the ground plate is provided with two first avoiding holes and a second avoiding hole, the two connecting pieces are respectively arranged in the two first avoiding holes, and the probe is arranged in the second avoiding hole.
Preferably, a first gap is formed between the connecting piece and the hole wall of the first avoidance hole, and a second gap is formed between the probe and the hole wall of the second avoidance hole.
The directional differential feed network comprises:
the antenna comprises a microstrip line, wherein a signal input end and two signal output ends are arranged on the microstrip line, each signal output end is electrically connected with the radiation patch through each connecting piece, and the signal input end is externally connected with a signal source.
Preferably, the first substrate and the second substrate are spaced apart to form an air layer, and the super-surface structure is disposed on any surface of the first substrate.
Preferably, the first substrate is disposed on the radiation patch, and the super-surface structure is disposed on a surface of the first substrate facing away from the radiation patch.
The technical scheme of the invention is that a first substrate, a second substrate, a third substrate and a fourth substrate are stacked, a super-surface mechanism is arranged on the first substrate, a directional differential feed network is arranged on the surface of the fourth substrate far away from the first substrate, two signal output ends of the directional differential feed network are electrically connected with a radiation patch, the directional differential feed network carries out differential feed to the radiation patch through the two signal output ends, the radiation patch generates a directional radiation source, a capacitive matching network is arranged in the second substrate and the third substrate, an earth plate is arranged between the third substrate and the fourth substrate, the capacitive matching network is connected with the radiation patch to enable the radiation patch to generate an omnidirectional radiation source, a super-surface structure receives the directional radiation source and/or the omnidirectional radiation source and widens the frequency band width of the directional radiation source and/or the omnidirectional radiation source, and increasing the gain of the directional radiation source and/or the omnidirectional radiation source.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a super-surface antenna according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of a super-surface antenna according to the present invention;
FIG. 3 is a schematic structural diagram of a directional differential feed network according to an embodiment of the super-surface antenna of the present invention;
FIG. 4 is a schematic structural diagram of a super-surface structure of an embodiment of a super-surface antenna according to the present invention;
FIG. 5 is a schematic structural diagram of a radiation patch according to an embodiment of the super-surface antenna of the present invention;
FIG. 6 is a schematic structural diagram of a feed patch according to an embodiment of the super-surface antenna of the present invention;
FIG. 7 is a schematic structural diagram of a super-surface antenna according to another embodiment of the present invention;
FIG. 8 is a simulation and test result of reflection coefficient and gain in the omnidirectional radiation pattern of the super-surface antenna of the present invention;
FIG. 9 is a simulation and test result of reflection coefficient and gain in the super surface antenna directional radiation mode state according to the present invention;
FIG. 10 is a simulation and test result of the isolation between two ports of the super-surface antenna of the present invention;
FIG. 11 is a simulation and test result of correlation coefficients for a super-surface antenna in accordance with the present invention;
FIG. 12 is a test chart (one) at 5.3GHz for simulation and test of the super-surface antenna of the present invention in an omnidirectional radiation pattern;
FIG. 13 is a test chart (two) of the super-surface antenna of the present invention at 5.3GHz during simulation and test in the omnidirectional radiation mode;
FIG. 14 is a test chart (III) of the super-surface antenna of the present invention at 5.3GHz simulated and tested in an omnidirectional radiation pattern;
FIG. 15 is a simulation and test of a super-surface antenna at 5.3GHz in a directive radiation mode according to an embodiment of the invention;
FIG. 16 shows a simulated and tested super-surface antenna at 5.3GHz in a directional radiation mode according to an embodiment of the invention;
fig. 17 is a (iii) diagram of a super-surface antenna at 5.3GHz simulated and tested in a directional radiation mode state according to an embodiment of the invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are 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 "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides a super-surface antenna 100.
As shown in fig. 1 to 3, the super-surface antenna 100 includes: a first substrate 10, a second substrate 20, a third substrate 30 and a fourth substrate 40 stacked in this order; a super-surface structure 50, wherein the super-surface structure 50 is disposed on the first substrate 10; a radiation patch 60 disposed on a surface of the second substrate 20 facing the first substrate 10; a ground plate 70 disposed on a surface of the third substrate 30 facing the fourth substrate 40; a directional differential feed network 80, wherein the directional differential feed network 80 is disposed on a surface of the fourth substrate 40 away from the third substrate 30, and the directional differential feed network 80 is configured to differentially feed the super-surface structure 50 to generate a directional radiation source; a capacitive matching network 90, the capacitive matching network 90 being disposed through the second substrate 20 and the third substrate 30, the capacitive matching network 90 connecting the radiating patch 60 and the ground plate 70 such that the radiating patch 60 generates an omnidirectional radiation source.
In recent years, with the continuous development of wireless communication technology, it is a trend to develop high-performance antennas that transmit and receive various carrier signals. For example, in mobile communication, satellite communication and vehicle-mounted communication, antennas with different radiation directions are required to transmit and receive signals, so as to improve the stability and reliability of the communication system. Conventional antennas that provide only a single radiation pattern are inadequate, resulting in increased cost and complexity. Therefore, there is a strong need to design an antenna that has low cost, compact structure, and high performance, and can achieve pattern diversity characteristics. Compared with a patch antenna, the super-surface antenna 100 has the advantages of wide bandwidth, high gain, and the like.
The existing pattern diversity antenna or pattern reconfigurable antenna adopts two or more feed ports 93 in the same antenna structure, and although the omnidirectional radiation pattern and the directional radiation pattern can be realized, the mode is limited by narrow frequency band width and low gain.
In view of this, in the present embodiment, in order to increase the band width and gain of the omnidirectional radiation source and the directional radiation source, the first substrate 10, the second substrate 20, the third substrate 30, and the fourth substrate 40 are stacked, the super-surface mechanism is disposed on the first substrate 10, the radiation patch 60 is disposed on the surface of the second substrate 20 facing the first substrate 10, the directional differential feed network 80 is disposed on the surface of the fourth substrate 40 away from the first substrate 10, two signal output terminals 84 of the directional differential feed network 80 are electrically connected to the radiation patch 60, the directional differential feed network 80 performs differential feed to the radiation patch 60 through the two signal output terminals 84, so that the radiation patch 60 generates the directional radiation source, meanwhile, the capacitive matching network 90 is disposed in the second substrate 20 and the third substrate 30, the ground plate 70 is disposed between the third substrate 30 and the fourth substrate 40, the capacitive matching network 90 is connected to the radiation patch 60 such that the radiation patch 60 produces an omnidirectional radiation source. For example, the directional differential feed network 80 outputs a differential signal to the radiation patch 60 to cause the radiation patch 60 to generate a directional radiation source, the capacitive matching network 90 generates an omnidirectional radiation source through the radiation patch 60, the super-surface structure 50 receives the directional radiation source and/or the omnidirectional radiation source, and widens the frequency band width of the directional radiation source and/or the omnidirectional radiation source, and increases the gain of the directional radiation source and/or the omnidirectional radiation source.
It will be appreciated that the ground plate 70 may also be used to reflect the omnidirectional and/or directional radiation sources produced by the radiation patch 60.
Specifically, the capacitive matching network 90 includes: a feeding patch 91, wherein the feeding patch 91 is disposed between the third substrate 30 and the second substrate 20, and the feeding patch 91 is electrically connected to the ground plate 70; the metal post 92 penetrates through the second substrate 20, and two ends of the metal post 92 are respectively connected to the radiation patch 60 and the feed patch 91. In this embodiment, the feed patch 91 of the capacitive matching network 90 is disposed between the third substrate 30 and the second substrate 20, the feed patch 91 is connected to the radiation patch 60 through the metal post 92, the feed patch 91 is externally connected to a signal source, and the signal source acts on the radiation patch 60 through the metal post 92, so that the radiation patch 60 generates an omnidirectional radiation source.
Specifically, both ends of the metal post 92 are connected to the central position of the radiation patch 60 and the central position of the feed patch 91, respectively. In this embodiment, in order to stabilize omnidirectional radiation, the feed patch 91 is located at the center of the radiation patch 60, and the metal post 92 is located at the center of the feed patch 91.
Specifically, the capacitive matching network 90 further includes: a feed port 93; and one end of the probe 94 is connected to the feeding port 93, and the other end of the probe 94 sequentially passes through the ground plate 70 and the third substrate 30 and is connected to the feeding patch 91. In this embodiment, the capacitive matching network 90 further includes a feeding port 93 and a probe 94, and the feeding patch 91 is externally connected to the signal source through the probe 94 and the feeding port 93.
Specifically, the directional differential feeding network 80 further includes: two connecting pieces 81, the two connecting pieces 81 sequentially penetrate through the second substrate 20, the third substrate 30, the ground plate and the fourth substrate 40, and two ends of each connecting piece 81 are respectively electrically connected with the radiation patch 60 and the directional differential feed network 80. In this embodiment, the directional differential feed network 80 may be a one-to-two microstrip line 82 structure, which has a signal input end 83 and two signal output ends 84, one end of each connection element 81 is connected to the signal output end 84 of the directional differential feed network 80, and the other end sequentially passes through the fourth substrate 40, the ground plate 70, the third substrate 30, and the second substrate 20 from bottom to top and is connected to the radiation patch 60, the signal input end 83 of the directional differential feed network 80 inputs a signal source through an external radio frequency connector, one end of the probe 94 is connected to the feed port 93, and the other end is connected to a feed, the probe 94, the feed patch 91, and the metal post 92 form a capacitively-loaded stepped impedance converter, the feed patch 91 receiving the signal source directly feeds the center of the radiation patch 60 through the metal post 92 to generate an omnidirectional radiation source, the capacitively-loaded stepped impedance converter can widen the operating bandwidth of the omnidirectional radiation mode, the directional differential feed network 80 feeds back the radiation patch 60 in constant amplitude through two connectors 81 to generate a directional radiation source, and finally the super-surface structure 50 receives the directional radiation source and/or the omnidirectional radiation source, widens the frequency band width of the directional radiation source and/or the omnidirectional radiation source, and increases the gain of the directional radiation source and/or the omnidirectional radiation source.
It is understood that the connecting member 81 is made of a metal material.
Specifically, the ground plate 70 is provided with two first clearance holes (not shown) and one second clearance hole (not shown), the two connectors 81 are respectively disposed in the two first clearance holes, and the probes 94 are disposed in the second clearance hole. In this embodiment, the ground plate 70 may be provided with two first avoiding holes and one second avoiding hole, the diameter of the first avoiding hole is larger than the diameter of the connecting member 81, the diameter of the second avoiding hole is larger than the diameter of the probe 94, so that the two connecting members 81 are respectively disposed in the two first avoiding holes, and the probe 94 is disposed in the second avoiding hole.
Specifically, a first gap is formed between the connecting member 81 and the hole wall of the first avoiding hole, and a second gap is formed between the probe 94 and the hole wall of the second avoiding hole. In this embodiment, the connecting member 81 and the probes 94 cannot contact the ground plate 70, so a first gap needs to be formed between the connecting member 81 and the hole wall of the first avoiding hole, and a second gap needs to be formed between the probes 94 and the hole wall of the second avoiding hole.
Specifically, the directional differential feeding network 80 includes: the microstrip line 82 is provided with a signal input end 83 and two signal output ends 84, each signal output end 84 is electrically connected with the radiation patch 60 through each connecting piece 81, and the signal input end 83 is externally connected with a signal source. In this embodiment, the signal input end 83 of the microstrip line 82 inputs a signal source through an external rf connector, and performs differential feeding to the radiation patch 60 through the two signal output ends 84 of the microstrip line 82.
Specifically, the first substrate 10 and the second substrate 20 are spaced apart to form an air layer a, and the super-surface structure 50 is disposed on either surface of the first substrate 10. As an alternative embodiment, in order to improve the gain effect of the super-surface structure 50 to the omnidirectional radiation source and/or the directional radiation source of the external radiation, the first substrate 10 and the second substrate 20 may be spaced apart from each other, so that an air layer a is formed between the first substrate 10 and the second substrate 20, and the radiation patch 60 radiates the omnidirectional radiation source and/or the directional radiation source to the super-surface through the air layer a.
Specifically, the first substrate 10 is disposed on the radiation patch 60, and the super-surface structure 50 is disposed on a surface of the first substrate 10 facing away from the radiation patch 60. As another alternative, the first substrate 10 may be disposed on the radiation patch 60, such that the super-surface structure 50 is disposed on a surface of the first substrate 10 facing away from the radiation patch 60, the first substrate 10 is used to support the super-surface structure 50, and there is no air layer a between the radiation patch 60 and the super-surface structure 50, so as to reduce the thickness of the whole super-surface antenna 100.
The following experiments are provided to further illustrate the characteristics of the super-surface antenna 100 of the present invention:
referring to fig. 4 to 7, the thicknesses of the first, second, third, and fourth substrates 10, 20, 30, and 40 are set to H1, H2, H3, and H4, respectively, and H1-H2-H3-H4-1 mm, and a dielectric constant of 2.2;
setting the side lengths L1, L2 and L3 of the first substrate 10, the second substrate 20 and the third substrate 30 to be 80mm by 80mm, and setting the side length L4 of the fourth substrate 40 to be 70mm by 40 mm;
setting a super-surface structure 50 to be composed of 16 super-surface units, wherein the 16 super-surface units are arranged in a 16-by-16 array to form a square structure, the side length L5 of each super-surface unit is 10.8mm, the gap g between every two adjacent super-surface units is 0.6mm, in addition, the distance between the side length L5 of each super-surface unit and the gap g is set to be the period p of the super-surface structure 50, and each period p is 11.4 mm;
setting a first substrate 10 and a second substrate 20 to be arranged at intervals, and reserving an air layer A between the first substrate 10 and the second substrate 20, wherein the thickness Ha of the air layer A is 2 mm;
the radiation patch 60 is set to be square and has a side length LSpokeIs 20 mm;
the feed patch 91 is set to be square and has a side length LFeed deviceIs 11.2 mm;
setting the diameter R1 of the metal column 92 to be 5.2mm, the diameter R2 of the probe 94 to be 1.3mm, the diameter R3 of the connecting piece 81 to be 2mm, and the distance Ds between the two connecting pieces 81 to be 17 mm;
setting the aperture Rc of the first avoiding hole to be 3mm and the aperture Re of the second avoiding hole to be 4 mm;
as shown in table 1 below, a data graph of frequency versus reflection and gain effects for the super-surface antenna 100 of the present invention in omni-directional radiation mode is shown:
referring to fig. 8, a simulation and test result of reflection coefficient and gain of the super-surface antenna 100 in the omnidirectional radiation mode according to the embodiment of the present invention is shown. From the actual measurement result in fig. 8, it can be seen that the super-surface antenna 100 of the present invention has an impedance bandwidth of 11.2% (5.11-5.72 GHz) in the omnidirectional radiation mode, which is approximately consistent with the simulation result. In addition, the gain tested in the operating band was 6.8 dBi.
As shown in table 2 below, the data graph of the frequency versus the reflection effect and the gain effect of the super-surface antenna 100 of the present invention in the directional radiation mode is as follows:
referring to fig. 9, simulation and test results of reflection coefficient and gain of the super-surface antenna 100 in the directional radiation mode according to the embodiment of the present invention are shown. As can be seen from the actual measurement result in FIG. 9, the antenna has an impedance bandwidth of 30.8% (4.23-5.77 GHz) in the directional radiation state. In addition, the gain tested in the operating band was as high as 11.5 dBi.
As shown in table 3 below, a data graph of frequency and isolation for the inventive super-surface antenna 100 is shown:
referring to fig. 10, a simulation and test result of the separation between the feed port 93 of the super-surface antenna 100 and any signal output end 84 of the directional differential feed network 80 according to the embodiment of the present invention; as can be seen from the results in fig. 10, the isolation between the two signal output ports 84 is higher than 32dB in the operating frequency band where the two radiation modes coincide.
As shown in table 4 below, a data chart of simulation and test results of the correlation coefficient of the super-surface antenna 100 of the present invention:
| frequency (GHz) | Correlation coefficient simulation results | Correlation coefficient test results |
| 4 | 0.16300 | 0.12872 |
| 4.1 | 0.08584 | 0.09263 |
| 4.2 | 0.04658 | 0.08469 |
| 4.3 | 0.02518 | 0.08665 |
| 4.4 | 0.01338 | 0.07805 |
| 4.5 | 0.00696 | 0.06393 |
| 4.6 | 0.00352 | 0.04457 |
| 4.7 | 0.00172 | 0.0315 |
| 4.8 | 0.00084 | 0.02295 |
| 4.9 | 0.00048 | 0.0171 |
| 5 | 0.00039 | 0.01265 |
| 5.1 | 0.00042 | 0.00561 |
| 5.2 | 0.00047 | 0.00294 |
| 5.3 | 0.00050 | 0.00408 |
| 5.4 | 0.00048 | 0.00423 |
| 5.5 | 0.00039 | 0.00522 |
| 5.6 | 0.00025 | 0.00442 |
| 5.7 | 0.00015 | 0.00905 |
| 5.8 | 0.00009 | 0.01776 |
| 5.9 | 0.00520 | 0.02133 |
| 6 | 0.07679 | 0.03209 |
Referring to fig. 11, simulation and test results of correlation coefficients of the super-surface antenna 100 according to the embodiment of the invention are shown. As can be seen from the results in fig. 11, the correlation coefficient between the two ports is below 0.025 in the operating band where the two radiation modes coincide.
Referring to fig. 12-14, the results of the pattern simulation and testing at 5.3GHz for the super-surface antenna 100 of the embodiment of the present invention in the omni-directional radiation mode are shown, where fig. 12 is in the xoz plane, fig. 13 is in the yoz plane, and fig. 14 is in the xoy plane. As can be seen from the results in the figure, the super-surface antenna 100 has good omnidirectional radiation characteristics at the first feed port 93.
Referring to fig. 15-17, the results of the pattern simulation and testing at 5.3GHz for the super-surface antenna 100 of the embodiment of the present invention in the omni-directional radiation mode are shown, where fig. 15 is in the xoz plane, fig. 16 is in the yoz plane, and fig. 17 is in the xoy plane. As can be seen from the results in the figure, the antenna has good directional radiation characteristics at the first feed port 93.
From the above experiments, the super-surface antenna 100 provided by the present invention can provide two working modes of directional radiation and omnidirectional radiation, and the two working modes have a wider coincidence bandwidth and a higher radiation gain, and simultaneously have the characteristics of simple structure and easy processing.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A super-surface antenna, comprising:
the first substrate, the second substrate, the third substrate and the fourth substrate are sequentially stacked;
a super-surface structure disposed on the first substrate;
a radiation patch disposed on a surface of the second substrate facing the first substrate;
a ground plate disposed on a surface of the third substrate facing the fourth substrate;
the directional differential feed network is arranged on the surface, far away from the third substrate, of the fourth substrate and is used for differentially feeding the super-surface structure to generate a directional radiation source;
the capacitive matching network comprises a feed patch, the feed patch is arranged between the third substrate and the second substrate, and the feed patch is electrically connected with the grounding plate; the metal column penetrates through the second substrate, and two ends of the metal column are respectively connected with the radiation patch and the feed patch so that the radiation patch generates an omnidirectional radiation source.
2. The super-surface antenna as claimed in claim 1, wherein both ends of the metal post are connected to a central position of the radiating patch and a central position of the feeding patch, respectively.
3. The super surface antenna as recited in claim 1, wherein said capacitive matching network further comprises:
a feed port;
and one end of the probe is connected with the feed port, and the other end of the probe sequentially penetrates through the grounding plate and the third substrate and is connected with the feed patch.
4. The super surface antenna of claim 3, wherein the directional differential feed network further comprises:
the two connecting pieces sequentially penetrate through the second substrate, the third substrate, the grounding plate and the fourth substrate, and two ends of each connecting piece are electrically connected with the radiation patch and the directional differential feed network respectively.
5. The super-surface antenna according to claim 4, wherein the ground plate is provided with two first avoiding holes and a second avoiding hole, the two connectors are respectively disposed in the two first avoiding holes, and the probe is disposed in the second avoiding hole.
6. The super-surface antenna according to claim 5, wherein a first gap is provided between the connecting member and the hole wall of the first avoiding hole, and a second gap is provided between the probe and the hole wall of the second avoiding hole.
7. The super surface antenna of claim 4, wherein the directional differential feed network comprises:
the antenna comprises a microstrip line, wherein a signal input end and two signal output ends are arranged on the microstrip line, each signal output end is electrically connected with the radiation patch through each connecting piece, and the signal input end is externally connected with a signal source.
8. A super surface antenna according to any one of claims 1 to 7, wherein the first substrate and the second substrate are spaced apart to form a layer of air, the super surface structure being provided on either surface of the first substrate.
9. The super-surface antenna according to any one of claims 1 to 7, wherein the first substrate is disposed on the radiating patch and the super-surface structure is disposed on a surface of the first substrate facing away from the radiating patch.
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| CN109994830A (en) * | 2017-12-30 | 2019-07-09 | 深圳市景程信息科技有限公司 | Wideband differential antennae based on super surface |
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