CN210806002U - Broadband filtering antenna based on grid slotted patch - Google Patents
Broadband filtering antenna based on grid slotted patch Download PDFInfo
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- CN210806002U CN210806002U CN201921920142.4U CN201921920142U CN210806002U CN 210806002 U CN210806002 U CN 210806002U CN 201921920142 U CN201921920142 U CN 201921920142U CN 210806002 U CN210806002 U CN 210806002U
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- 238000001914 filtration Methods 0.000 title claims abstract description 29
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- 230000005855 radiation Effects 0.000 claims description 3
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Abstract
The utility model discloses a broadband filtering antenna based on grid slotted patch, which comprises a first dielectric plate, a second dielectric plate and a third dielectric plate which are sequentially arranged from bottom to top; a first air layer is arranged between the first dielectric plate and the second dielectric plate; a second air layer is arranged between the second medium plate and the third medium plate; a third copper-clad layer is formed on the upper surface of the third dielectric plate, and a grid slotting paster is arranged on the third copper-clad layer; a second copper-clad layer is formed on the upper surface of the second dielectric plate, and a rectangular patch is arranged on the second copper-clad layer; the upper surface of the first dielectric plate is provided with a ground plate, the lower surface of the first dielectric plate is provided with a first copper-coated layer, the ground plate is provided with a coupling aperture, the first copper-coated layer is provided with a first half-wavelength U-shaped resonator, a second half-wavelength U-shaped resonator, a third half-wavelength U-shaped resonator and a coupling feeder, and the upper surface and the lower surface of the first dielectric plate are provided with input ports. The utility model discloses a fourth order filtering antenna based on wave filter integrated design, at 2.27GHz-2.57 GHz' S within range steady operation, S11< -10dB, and the gain keeps about 7.5dBi, whole antenna structure is simple compact, and processing is convenient moreover, and is with low costs.
Description
Technical Field
The utility model belongs to the technical field of the technique of antenna and specifically relates to indicate a broadband filtering antenna based on net fluting paster.
Background
With the rapid development of wireless communication and the commercialization of 5G communication systems, there are higher index requirements for the communication capacity and transmission rate of wireless communication systems, and furthermore, 5G communication systems have certain requirements for the filter characteristics of antennas. The patch antenna is widely applied to wireless communication systems due to its advantages of light weight, small size, easy conformality, easy processing, low cost, etc. However, microstrip patch antennas are often limited by their too narrow bandwidth of operation. As for the bandwidth expansion of patch antennas, many broadband filtering patch antenna technologies are proposed by researchers through continuous improvement and study of their characteristics. However, some methods cause problems such as reduced efficiency, reduced gain, unstable pattern, etc.
The prior art is investigated and known, and the details are as follows:
li-inspired professor and researchers proposed in 1995 to load a U-shaped slot to widen the bandwidth. The U-shaped slot is loaded to enable the patch to form a multi-tuning circuit, so that the frequency band is widened. The latter many loading slots widen the bandwidth based on this principle.
Professor elegans et al have proposed implementing a filtering antenna using a method of slotting and loading shorting bars on a patch.
In general, there is much research on designing wideband antennas and filtering antennas in the prior art, but many of the designed filtering antennas have limited bandwidth or only filtering in a certain direction, not filtering in all directions. Some methods implement bandwidth widening and filtering by forming multiple tuned loops by adding slots, etc., but the gain and waveform of the antenna may be affected. In order to overcome the problem of the narrow bandwidth that utilizes the design method that the wave filter is synthesized to design filtering antenna and bring, the utility model provides a broadband filtering antenna based on net fluting paster.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art 'S shortcoming and not enough, provide a broadband filtering antenna based on net fluting paster, be a fourth order filtering antenna based on wave filter integrated design, this antenna can be in 2.27GHz-2.57 GHz' S within range steady operation, S11 is less than-10 dB in 2.27GHz-2.57GHz 'S frequency range, and the gain in 2.27GHz-2.57 GHz' S frequency range keeps about 7.5dBi moreover. The whole antenna has simple and compact structure, convenient processing and low cost.
In order to achieve the above object, the present invention provides a technical solution: a broadband filtering antenna based on a grid slotted patch comprises a first dielectric slab, a second dielectric slab and a third dielectric slab; the second dielectric plate is positioned above the first dielectric plate, and a first air layer is arranged between the second dielectric plate and the first dielectric plate and used for improving the gain of the antenna; the third dielectric plate is positioned above the second dielectric plate, and a second air layer is arranged between the third dielectric plate and the second dielectric plate and used for reducing the reflection coefficient of the antenna in the bandwidth; a third copper-clad layer is formed on the upper surface of the third dielectric plate, and a grid slotted patch formed by intersecting and dividing a square patch by a plurality of horizontal slot lines and a plurality of vertical slot lines is arranged on the third copper-clad layer and used for improving the bandwidth of the antenna and reducing the reflection coefficient in a passband; a second copper-clad layer is formed on the upper surface of the second dielectric plate, and a rectangular patch is arranged on the second copper-clad layer and is used as a main radiation source of the whole antenna; the upper surface of the first dielectric plate is provided with a grounding plate, the lower surface of the first dielectric plate is provided with a first copper-clad layer, the grounding plate is provided with a coupling aperture, the first copper-clad layer is respectively provided with a first half-wavelength U-shaped resonator, a second half-wavelength U-shaped resonator, a third half-wavelength U-shaped resonator and a coupling feeder line, the upper surface and the lower surface of the first dielectric plate are provided with input ports, the second half-wavelength U-shaped resonator is positioned between the first half-wavelength U-shaped resonator and the third half-wavelength U-shaped resonator, the coupling feeder line is positioned at one side of the third half-wavelength U-shaped resonator and is connected with the input ports, the energy fed from the input ports can be coupled to the third half-wavelength U-shaped resonator, the third half-wavelength U-shaped resonator couples the energy to the second half-wavelength U-shaped resonator, and the second half-wavelength U-shaped resonator couples the energy to the first half-, the first half-wavelength U-shaped resonator couples energy to the rectangular patch through the coupling aperture, thereby achieving a fourth-order filtering function.
Furthermore, the grid slotted patch is formed by intersecting and dividing a square patch through five horizontal slot lines and three vertical slot lines, and 24 small rectangular patches are divided.
Further, the input port is a 50 ohm impedance matching port.
Compared with the prior art, the utility model, have following advantage and beneficial effect:
1. the utility model discloses the operating frequency of antenna is for exceeding 2.27GHz-2.57 GHz's frequency range, and relative bandwidth exceeds 12.4%.
2. The utility model discloses the antenna gain is very flat in 2.27GHz-2.57 GHz's frequency range, maintains stably in the within range about 7.5 dB.
3. The utility model discloses the antenna is based on the fourth order filtering antenna of wave filter integrated design method design, has fine filtering characteristic.
4. The directional diagram of the antenna of the utility model has good characteristics in the frequency range of 2.27GHz-2.57 GHz.
5. The utility model discloses antenna processing is simple, light in weight, and the processing cost is low, and the working bandwidth is wide, has fine application prospect.
Drawings
Fig. 1 is the utility model discloses a broadband filtering antenna stereogram based on net fluting paster.
Fig. 2 is a side view of the utility model discloses a broadband filtering antenna based on net fluting paster.
Fig. 3 is a schematic top surface view of a third dielectric plate according to the present invention.
Fig. 4 is a schematic top view of a second dielectric plate according to the present invention.
Fig. 5 is a schematic view of a lower surface of the first dielectric plate according to the present invention.
Figure 6 is the utility model discloses a reflection coefficient S of broadband filtering antenna based on net fluting paster11Simulation of simulation results and gain curvesAnd (5) a result chart.
Fig. 7 is a simulation result diagram of the directional diagram of the wideband filter antenna based on the grid slotted patch of the present invention at 2.4 GHz.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
Referring to fig. 1 to 5, the wideband filtering antenna based on the grid slotted patch provided in this embodiment includes a first dielectric slab 1, a second dielectric slab 2, and a third dielectric slab 3; the second dielectric plate 2 is positioned above the first dielectric plate 1, a first air layer 8 is arranged between the second dielectric plate and the first dielectric plate, and the first air layer 8 is mainly used for improving the gain of the antenna; the third dielectric plate 3 is positioned above the second dielectric plate 2, and a second air layer 9 is arranged between the third dielectric plate and the second dielectric plate, wherein the second air layer 9 is mainly used for reducing the reflection coefficient of the antenna in a bandwidth; a third copper-clad layer 7 is formed on the upper surface of the third dielectric plate 3, a grid slotted patch 10 is arranged on the third copper-clad layer 7, the grid slotted patch 10 is formed by intersecting and dividing a square patch through five horizontal slot lines and three vertical slot lines, 24 small rectangular patches are divided, the length of the square patch is 44.5 millimeters, the line widths of eight slot lines are all 0.5 millimeter, and the grid slotted patch has the main effects of improving the bandwidth of an antenna and reducing the reflection coefficient in a passband; a second copper-clad layer 6 is formed on the upper surface of the second dielectric plate 2, and a rectangular patch 11 is arranged on the second copper-clad layer 6 and is used as a main radiation source of the whole antenna and as the last stage of the filter comprehensive design; the upper surface of the first dielectric plate 1 is provided with a grounding plate 5, the lower surface of the first dielectric plate is provided with a first copper-clad layer 4, the grounding plate 5 is provided with a coupling aperture 12, the first copper-clad layer 4 is respectively provided with a first half-wavelength U-shaped resonator 13, a second half-wavelength U-shaped resonator 14, a third half-wavelength U-shaped resonator 15 and a coupling feeder 16, the upper surface and the lower surface of the first dielectric plate 1 are provided with an input port 17, the second half-wavelength U-shaped resonator 14 is positioned between the first half-wavelength U-shaped resonator 13 and the third half-wavelength U-shaped resonator 15, the coupling feeder 16 is positioned at one side of the third half-wavelength U-shaped resonator 15 and is connected with the input port 17, the energy fed from the input port 17 can be coupled to the third half-wavelength U-shaped resonator 15, the third half-wavelength U-shaped resonator 15 couples the energy to the second half-wavelength U-shaped resonator 14, the second half-wavelength U-resonator 14 couples energy to the first half-wavelength U-resonator 13, and the first half-wavelength U-resonator 13 couples energy to the rectangular patch 11 through the coupling aperture 12, thereby implementing a fourth order filtering function.
In the design, the dielectric constants of the first dielectric plate 1, the second dielectric plate 2 and the third dielectric plate 3 are all 2.55, and the loss tangent is 0.0029. The thickness of the first dielectric plate 1 is 0.8 mm, and the thickness of the second dielectric plate 2 and the thickness of the third dielectric plate 3 are both 1.5 mm. The thickness of the first air layer 8 is 2 mm, and the thickness of the second air layer 9 is 14 mm. The input port 17 is a 50 ohm impedance matching port.
Referring to fig. 6, the reflection coefficient S of the broadband filter antenna of the present embodiment is shown11And the simulation result of the gain curve. As can be seen from the figure, the reflection coefficient | S11|<The frequency range of-10 dB exceeds the frequency interval of 2.27GHz-2.57GHz, the relative bandwidth exceeds 12.4%, and in the frequency range of 2.27GHz-2.57GHz, the gain is flat and is kept at about 7.5 dBi.
Referring to fig. 7, simulation directions of the E plane and the H plane of the broadband filter antenna at the frequency point of 2.4GHz are shown. As can be seen from the figure, the directional diagram of the antenna of the present invention meets the required characteristics.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that all the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (3)
1. The utility model provides a broadband filtering antenna based on grid fluting paster which characterized in that: the dielectric plate comprises a first dielectric plate, a second dielectric plate and a third dielectric plate; the second dielectric plate is positioned above the first dielectric plate, and a first air layer is arranged between the second dielectric plate and the first dielectric plate and used for improving the gain of the antenna; the third dielectric plate is positioned above the second dielectric plate, and a second air layer is arranged between the third dielectric plate and the second dielectric plate and used for reducing the reflection coefficient of the antenna in the bandwidth; a third copper-clad layer is formed on the upper surface of the third dielectric plate, and a grid slotted patch formed by intersecting and dividing a square patch by a plurality of horizontal slot lines and a plurality of vertical slot lines is arranged on the third copper-clad layer and used for improving the bandwidth of the antenna and reducing the reflection coefficient in a passband; a second copper-clad layer is formed on the upper surface of the second dielectric plate, and a rectangular patch is arranged on the second copper-clad layer and is used as a main radiation source of the whole antenna; the upper surface of the first dielectric plate is provided with a grounding plate, the lower surface of the first dielectric plate is provided with a first copper-clad layer, the grounding plate is provided with a coupling aperture, the first copper-clad layer is respectively provided with a first half-wavelength U-shaped resonator, a second half-wavelength U-shaped resonator, a third half-wavelength U-shaped resonator and a coupling feeder line, the upper surface and the lower surface of the first dielectric plate are provided with input ports, the second half-wavelength U-shaped resonator is positioned between the first half-wavelength U-shaped resonator and the third half-wavelength U-shaped resonator, the coupling feeder line is positioned at one side of the third half-wavelength U-shaped resonator and is connected with the input ports, the energy fed from the input ports can be coupled to the third half-wavelength U-shaped resonator, the third half-wavelength U-shaped resonator couples the energy to the second half-wavelength U-shaped resonator, and the second half-wavelength U-shaped resonator couples the energy to the first half-, the first half-wavelength U-shaped resonator couples energy to the rectangular patch through the coupling aperture, thereby achieving a fourth-order filtering function.
2. The wideband filtering antenna based on grid slotted patch according to claim 1, characterized in that: the grid slotted patch is formed by intersecting and dividing a square patch by five horizontal slot lines and three vertical slot lines, and 24 small rectangular patches are divided.
3. The wideband filtering antenna based on grid slotted patch according to claim 1, characterized in that: the input port is a 50 ohm impedance matching port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921920142.4U CN210806002U (en) | 2019-11-08 | 2019-11-08 | Broadband filtering antenna based on grid slotted patch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921920142.4U CN210806002U (en) | 2019-11-08 | 2019-11-08 | Broadband filtering antenna based on grid slotted patch |
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| CN210806002U true CN210806002U (en) | 2020-06-19 |
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| CN201921920142.4U Expired - Fee Related CN210806002U (en) | 2019-11-08 | 2019-11-08 | Broadband filtering antenna based on grid slotted patch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072315A (en) * | 2020-09-17 | 2020-12-11 | 华南理工大学 | High-gain high-selectivity low-loss cavity filtering antenna |
| CN117477218A (en) * | 2023-12-26 | 2024-01-30 | 华南理工大学 | Microstrip beam reconfigurable antenna with wide stop band filter characteristic |
-
2019
- 2019-11-08 CN CN201921920142.4U patent/CN210806002U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072315A (en) * | 2020-09-17 | 2020-12-11 | 华南理工大学 | High-gain high-selectivity low-loss cavity filtering antenna |
| CN117477218A (en) * | 2023-12-26 | 2024-01-30 | 华南理工大学 | Microstrip beam reconfigurable antenna with wide stop band filter characteristic |
| CN117477218B (en) * | 2023-12-26 | 2024-03-26 | 华南理工大学 | Microstrip beam reconfigurable antenna with wide stop band filter characteristic |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200619 |