CN116613538A - Low-profile miniaturized broadband super-surface antenna - Google Patents
Low-profile miniaturized broadband super-surface antenna Download PDFInfo
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- CN116613538A CN116613538A CN202310768867.0A CN202310768867A CN116613538A CN 116613538 A CN116613538 A CN 116613538A CN 202310768867 A CN202310768867 A CN 202310768867A CN 116613538 A CN116613538 A CN 116613538A
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- 230000000694 effects Effects 0.000 abstract description 4
- 230000000737 periodic effect Effects 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 description 8
- 238000004088 simulation Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Classifications
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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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- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application discloses a low-profile miniaturized broadband super-surface antenna, and relates to the technical field of antennas. The low-profile miniaturized broadband super-surface antenna includes: the ultra-surface patch, the first layer of dielectric substrate, the grounding plate, the second layer of dielectric substrate and the feed microstrip structure are sequentially arranged from top to bottom; through the shape of the paster unit in the optimal design super-surface antenna, set up six non-periodic arrangement's pentagon paster units in the central region, four angles about, set up four trapezoidal paster units and set up two triangle-shaped paster units, and, the feeding microstrip structure arranges such structural design of the lower surface of second floor dielectric substrate in, has not only improved super-surface antenna's performance, makes it can work in the wide frequency range, has reached low profile's purpose, has realized super-surface antenna size miniaturized effect moreover.
Description
Technical Field
The application relates to the technical field of antennas, in particular to a low-profile miniaturized broadband super-surface antenna.
Background
The antenna plays an important role in a wireless communication system as a device for transmitting and receiving signals in the wireless communication system, which greatly affects the quality of wireless communication. With the increasing development of wireless communication systems, performance index requirements for antennas are also increasing. The traditional antenna can only meet the performance requirements of broadband, high efficiency, high gain and the like on the premise of larger size. The super surface is used as an electromagnetic metamaterial, has the capability of regulating and controlling the phase, amplitude, polarization mode and the like of electromagnetic waves, is loaded in a traditional antenna, and can achieve the purposes of reducing the electric size of the antenna, expanding the working frequency band, improving the gain and the like. Based on the above advantages, supersurfaces have been widely used and antenna designs.
The studies on miniaturized super-surface antennas mainly have the following types: 1) The super-surface structure is used as the floor of the antenna, and the forward radiation energy of the antenna is enhanced by utilizing the same-phase reflection characteristic of the super-surface, so that the effects of reducing the section of the antenna and expanding the bandwidth of the antenna are achieved; 2) The super-surface structure is used as a direct radiator of the antenna, the near-field resonance parasitic principle is utilized, the slot antenna or the patch antenna is used as an excitation source, the super-surface is used as an excited parasitic structure, and the resonance mode of the super-surface is excited, so that the whole antenna has a plurality of working modes including the working mode of the excitation source, and the bandwidth of the antenna is expanded. For example: teruhisa Nakamura et al in paper Broadband Design of Circularly Polarized Microstrip Patch Antenna Using Artificial Ground Structure With RectangularUnit Cells designed a circularly polarized low profile wideband ultra-surface antenna with enhanced forward radiation and an extended impedance matching bandwidth by placing a ultra-surface floor consisting of periodic arrangements of artificial magnetic conductor elements under the radiating patch. Zhi Ning Chen et al in the paper "Meta-Based Low-Profile Broadband Aperture-Coupled Grid-Slotted Patch Antenna" designed a slot fed Low profile wideband ultra-surface antenna, placing the slot antenna directly under the center slot of the ultra-surface structure while exciting two adjacent resonant modes, thereby achieving bandwidth expansion.
Since the reduction of the antenna size results in a reduction of the radiating area of the antenna and thus a reduction of the operating bandwidth, although the surface antenna of the prior art has the advantages of a low profile and a wide band, it is difficult to further reduce the size of the surface antenna while ensuring the low profile and the wide band.
Disclosure of Invention
The application aims to provide a low-profile miniaturized broadband super-surface antenna, which solves the problem of further reducing the size of the surface antenna while ensuring low profile and expandable bandwidth.
In order to achieve the above object, the present application provides the following solutions:
a low profile miniaturized broadband super surface antenna comprising:
the ultra-surface patch, the first layer of dielectric substrate, the grounding plate, the second layer of dielectric substrate and the feed microstrip structure are sequentially arranged from top to bottom;
the super surface patch is attached to the upper surface of the first dielectric substrate; the lower surface of the first dielectric substrate is tightly attached to the grounding plate; the super surface patch includes: six non-periodically arranged pentagonal patch units, four trapezoidal patch units at the upper, lower, left and right corners and two triangular patch units at the left and right corners are arranged in the central area, six pentagonal patch units are arranged in a central symmetry manner, four trapezoidal patch units are arranged in a central symmetry manner, and two triangular patch units are arranged in an axial symmetry manner; a rectangular gap is etched in the center of the grounding plate;
the upper surface of the second dielectric substrate is clung to the grounding plate; the feeding microstrip structure is attached to the lower surface of the second layer of dielectric substrate, and the feeding microstrip structure comprises: a first rectangular patch and a second rectangular patch connected to the first rectangular patch; the feeding microstrip structure is used for feeding the super-surface patch.
Optionally, narrow gaps are respectively arranged between the adjacent pentagonal patch units, between the adjacent pentagonal patch units and the trapezoidal patch units and between the adjacent pentagonal patch units and the triangular patch units, and the narrow gaps are 0.2mm.
Optionally, the first rectangular patch size is 1.1mm x 2.2mm.
Optionally, the second rectangular patch has dimensions of 9.65mm x 0.55mm.
Optionally, the shapes and the sizes of the first layer of dielectric substrate, the grounding plate and the second layer of dielectric substrate are the same, and the first layer of dielectric substrate, the grounding plate and the second layer of dielectric substrate are rectangular structures.
Optionally, the lateral dimensions of the first dielectric substrate, the ground plate and the second dielectric substrate are all 18.5mm×18.5mm.
Optionally, the thickness of the first dielectric substrate is 1.5mm.
Optionally, the thickness of the second dielectric substrate is 0.4mm.
Optionally, the relative dielectric constants of the first layer of dielectric substrate and the second layer of dielectric substrate are 3.55.
Alternatively, the rectangular slit has a lateral dimension of 9.5mm×1.5mm.
According to the specific embodiment provided by the application, the application discloses the following technical effects:
according to the low-profile miniaturized broadband super-surface antenna, the shapes of the patch units in the super-surface antenna are optimally designed, six non-periodically arranged pentagonal patch units, four trapezoidal patch units arranged at the upper, lower, left and right corners and two triangular patch units arranged at the left and right corners are arranged in the central area, so that the performance of the super-surface antenna is improved, the super-surface antenna can work in a wider frequency range, and the feeding microstrip structure is arranged on the lower surface of the second-layer dielectric substrate, so that the purpose of low profile is achieved. Because the shape of the patch units in the super-surface antenna is optimally designed, namely, six pentagonal patch units are arranged in the central area, four trapezoidal patch units are arranged at the upper, lower, left and right corners, and two triangular patch units are arranged at the left and right corners, the electric size of the super-surface antenna is set to be 0.37 lambda lower ×0.37λ lower ×0.038λ lower In the case of (2), the characteristics of high efficiency are still provided. Therefore, the application realizes the effect of miniaturization of the size of the ultra-surface antenna while ensuring low profile and broadband.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings that are needed in the embodiments 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 low-profile miniaturized wideband ultra-surface antenna according to the present application;
FIG. 2 is a top view of a low profile miniaturized wideband ultra-surface antenna provided by the present application;
FIG. 3 is a top view of a ground plane of a low profile miniaturized wideband ultra-surface antenna according to the present application;
fig. 4 is a top view of a feeding microstrip structure of a low-profile miniaturized wideband ultra-surface antenna according to the present application;
FIG. 5 is a side view of a low profile miniaturized broadband super-surface antenna provided by the present application;
FIG. 6 is a graph of simulation results of the antenna reflection coefficient of the low profile miniaturized wideband ultra-surface antenna provided by the present application;
FIG. 7 is a normalized radiation pattern at a frequency of 6.47GHz for a low-profile miniaturized broadband super-surface antenna provided by the present application; fig. 7 (a) is a simulated pattern of the E-plane at 6.47GHz, provided by the present application; fig. 7 (b) is a simulated pattern of the H-plane at a frequency of 6.47GHz provided by the present application;
FIG. 8 is a normalized radiation pattern at 8.03GHz of the low-profile miniaturized broadband super-surface antenna provided by the present application; fig. 8 (a) is a simulated pattern of the E-plane at a frequency of 8.03GHz provided by the present application; fig. 8 (b) is a simulated pattern of the H-plane at a frequency of 8.03GHz provided by the present application;
FIG. 9 is a graph of achievable gain versus frequency for a low profile miniaturized wideband ultra-surface antenna provided by the present application over a wideband range;
fig. 10 is a graph of overall efficiency versus frequency for a low profile miniaturized wideband ultra-surface antenna provided by the present application over a wideband range.
Symbol description:
the micro-strip antenna comprises a super-surface patch-1, a first layer of dielectric substrate-2, a grounding plate-3, a second layer of dielectric substrate-4 and a feeding micro-strip structure-5.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application aims to provide a low-profile miniaturized broadband super-surface antenna, which is characterized in that six non-periodically arranged pentagonal patch units, four trapezoidal patch units and two triangular patch units are arranged at the upper, lower, left and right corners of the central area through optimally designing the shape of patch units in the super-surface antenna, and a feeding microstrip structure is arranged on the lower surface of a second-layer dielectric substrate.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 to 5, the low-profile miniaturized broadband super-surface antenna provided by the present application includes: the ultra-surface patch 1, the first layer of dielectric substrate 2, the grounding plate 3, the second layer of dielectric substrate 4 and the feed microstrip structure 5 are arranged from top to bottom in sequence.
The super surface patch 1 is attached to the upper surface of the first dielectric substrate 2; the lower surface of the first dielectric substrate 2 is tightly attached to the grounding plate 3; the super surface patch 1 includes: six non-periodically arranged pentagonal patch units, four trapezoidal patch units at the upper, lower, left and right corners and two triangular patch units at the left and right corners are arranged in the central area, six pentagonal patch units are arranged in a central symmetry manner, four trapezoidal patch units are arranged in a central symmetry manner, and two triangular patch units are arranged in an axial symmetry manner; the center of the ground plate 3 is etched with a rectangular slit. Wherein, four trapezoidal paster units are right trapezoid, and two triangle-shaped paster units are isosceles triangle.
The upper surface of the second dielectric substrate 4 is tightly attached to the grounding plate 3; the feeding microstrip structure 5 is attached to the lower surface of the second dielectric substrate 4, and the feeding microstrip structure 5 includes: a first rectangular patch and a second rectangular patch connected to the first rectangular patch; the feeding microstrip structure 5 is used for feeding the super surface patch 1.
Further, narrow gaps are formed among the pentagonal patch units, the pentagonal patch units and the trapezoid patch units, and the triangular patch units, and are 0.2mm.
Further, the first rectangular patch has a size of 1.1mm×2.2mm, and the second rectangular patch has a size of 9.65mm×0.55mm.
Further, the shapes and the sizes of the first layer of dielectric substrate 2, the grounding plate 3 and the second layer of dielectric substrate 4 are the same, and are rectangular structures, and the transverse sizes of the first layer of dielectric substrate 2, the grounding plate 3 and the second layer of dielectric substrate 4 are 18.5mm×18.5mm.
Specifically, the thickness of the first dielectric substrate 2 is 1.5mm, and the thickness of the second dielectric substrate 4 is 0.4mm.
Further, the relative dielectric constants of the first dielectric substrate 2 and the second dielectric substrate 4 are 3.55. Specifically, the first dielectric substrate 2 and the second dielectric substrate 4 are Rogers RO4003 plates with a relative dielectric constant of 3.55.
Further, the transverse dimension of the rectangular slit is 9.5mm×1.5mm.
The ultra-surface patch 1 adopts a non-periodic arrangement mode, six pentagonal patches at the center are in petal-shaped distribution, one trapezoid patch is arranged at each of four corners, one triangle patch is arranged at the center of each of the left side and the right side, the antenna performance is improved, the antenna works in a wider frequency range, the total thickness of the first layer dielectric substrate 2 and the second layer dielectric substrate 4 is 1.9mm, and the electric size is 0.37 lambda lower ×0.37λ lower ×0.038λ lower In the case of (a), 31.9% impedance bandwidth and 88% overall efficiency are obtained, and the characteristics of miniaturization, low profile, broadband and high efficiency are achieved. In addition, the application also adopts a slot antenna to excite the super surface, and the excitation mode is simple and effective. Wherein lambda is lower Representing the wavelength corresponding to the lowest operating frequency point in free space.
The application can work at 6.02GHz-8.31GHz, has simple structure, low cost and easy processing, and can meet the requirements of low profile and wide frequency band of the antenna of the wireless communication system.
The parameters of the super-surface antenna dimensions are shown in table 1:
TABLE 1 ultra-surface antenna size parameter Table
Wherein H1 in table 1 represents the thickness of the second dielectric substrate 4; h2 represents the thickness of the first dielectric substrate 2; the lengths of the long sides of the first layer of dielectric substrate 2, the second layer of dielectric substrate 4, the grounding plate 3 and the super surface patch 1 are equal, and are represented by W; the lengths of the short sides of the first layer of dielectric substrate 2, the second layer of dielectric substrate 4, the grounding plate 3 and the super surface patch 1 are equal, and are all denoted by L; the obtuse angles of the triangular patch units, the obtuse angles of the trapezoidal patch units and the obtuse angles of the pentagonal patch units in the super-surface patch 1 are all equal, and are represented by theta 1; the angles of acute angles of the six pentagonal patch units in the central area of the super-surface patch 1 are all equal, and are represented by theta 2; l1 and W1 respectively represent the length of the height and the length of the lower base of the trapezoid patch unit in the super-surface patch 1; l2 represents the base length of the triangular patch unit in the super surface patch 1; w2 represents the bottom edge lengths of the upper pentagonal patch and the lower pentagonal patch in the central area of the super-surface patch 1; l3 represents the base lengths of four pentagonal patch units on the diagonal line of the center of the subsurface patch 1; l4 represents the gap width between each unit patch in the super surface patch 1; l5 represents the length of the short side of the rectangular slit etched in the center of the ground plate 3, and W3 represents the length of the rectangular slit etched in the center of the ground plate 3. L6 and W4 represent the side lengths of the adjacent two sides of the first rectangular patch of the feed microstrip structure 5, respectively, and L7 and W5 represent the side lengths of the adjacent two sides of the second rectangular patch of the feed microstrip structure 5, respectively. In this embodiment, W is equal to L.
The application can be further illustrated by simulation results.
Fig. 6 is a diagram of simulation results of the antenna reflection coefficient of the low-profile miniaturized wideband ultra-surface antenna provided by the present application. Wherein the abscissa represents the frequency variable in GHz and the ordinate represents the amplitude variable in dB. The antenna has a-10 dB impedance bandwidth of 6.02GHz-8.31GHz and a relative bandwidth of 31.9%.
Fig. 7 is a normalized radiation pattern at a frequency of 6.47GHz for a low profile miniaturized broadband super-surface antenna provided by the present application. Wherein (a) in fig. 7 is a simulated pattern of the E-plane; fig. 7 (b) is a simulation pattern of the H plane. As can be seen from fig. 7, the antenna achieves a good radiation pattern throughout the entire operating frequency band.
Fig. 8 is a normalized radiation pattern at a frequency of 8.03GHz for a low profile miniaturized broadband super-surface antenna provided by the present application. Wherein (a) in fig. 8 is a simulated pattern of the E-plane; fig. 8 (b) is a simulation pattern of the H plane. As can be seen from fig. 8, the antenna achieves a good radiation pattern throughout the entire operating frequency band.
Fig. 9 is a graph of the achievable gain over frequency for a low profile miniaturized wideband ultra-surface antenna provided by the present application over a wideband range. Fig. 9 shows the achievable gain of the application. As can be seen from fig. 9, the range of gain achievable is 6.5dB-9.15dB over the entire operating frequency band.
Fig. 10 is a graph of overall efficiency versus frequency for a low profile miniaturized wideband ultra-surface antenna provided by the present application over a wideband range. Fig. 10 shows the overall efficiency of the present application. As can be seen from fig. 10, the overall efficiency of the antenna remains above 88% throughout the operating frequency band.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present application have been described herein with reference to specific examples, the above examples being provided only to assist in understanding the structure of the present application and its core ideas; also, it is within the scope of the present application to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the application.
Claims (10)
1. A low profile miniaturized broadband super surface antenna comprising: the ultra-surface patch, the first layer of dielectric substrate, the grounding plate, the second layer of dielectric substrate and the feed microstrip structure are sequentially arranged from top to bottom;
the super surface patch is attached to the upper surface of the first dielectric substrate; the lower surface of the first dielectric substrate is tightly attached to the grounding plate; the super surface patch includes: six non-periodically arranged pentagonal patch units, four trapezoidal patch units at the upper, lower, left and right corners and two triangular patch units at the left and right corners are arranged in the central area, six pentagonal patch units are arranged in a central symmetry manner, four trapezoidal patch units are arranged in a central symmetry manner, and two triangular patch units are arranged in an axial symmetry manner; a rectangular gap is etched in the center of the grounding plate;
the upper surface of the second dielectric substrate is clung to the grounding plate; the feeding microstrip structure is attached to the lower surface of the second layer of dielectric substrate, and the feeding microstrip structure comprises: a first rectangular patch and a second rectangular patch connected to the first rectangular patch; the feeding microstrip structure is used for feeding the super-surface patch.
2. The low profile miniaturized broadband super surface antenna according to claim 1, wherein narrow slits of 0.2mm are provided between adjacent pentagonal patch units, between adjacent pentagonal patch units and trapezoidal patch units, and between adjacent pentagonal patch units and triangular patch units.
3. The low profile miniaturized broadband super-surface antenna according to claim 1, wherein said first rectangular patch size is 1.1mm x 2.2mm.
4. The low profile miniaturized broadband super surface antenna according to claim 1, wherein the dimensions of said second rectangular patch are 9.65mm x 0.55mm.
5. The low profile miniaturized broadband super surface antenna according to claim 1, wherein the first layer dielectric substrate, the ground plate and the second layer dielectric substrate are all the same in shape and size and are all rectangular in structure.
6. The low profile miniaturized broadband super surface antenna according to claim 5, wherein the lateral dimensions of said first layer dielectric substrate, said ground plane and said second layer dielectric substrate are all 18.5mm x 18.5mm.
7. The low profile miniaturized broadband super surface antenna according to claim 6, wherein the thickness of said first layer dielectric substrate is 1.5mm.
8. The low profile miniaturized broadband super surface antenna according to claim 7, wherein the thickness of said second layer dielectric substrate is 0.4mm.
9. The low profile miniaturized broadband super surface antenna according to claim 8, wherein the relative dielectric constants of the first layer dielectric substrate and the second layer dielectric substrate are each 3.55.
10. The low profile miniaturized broadband super-surface antenna according to claim 1, wherein the rectangular slot has lateral dimensions of 9.5mm x 1.5mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116826397A (en) * | 2023-08-29 | 2023-09-29 | 中兴通讯股份有限公司 | array antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116826397A (en) * | 2023-08-29 | 2023-09-29 | 中兴通讯股份有限公司 | array antenna |
| CN116826397B (en) * | 2023-08-29 | 2024-04-16 | 中兴通讯股份有限公司 | Array antenna |
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