CN110444878A - A kind of filtering paster antenna with CT coupled structure - Google Patents
A kind of filtering paster antenna with CT coupled structure Download PDFInfo
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- CN110444878A CN110444878A CN201910781870.XA CN201910781870A CN110444878A CN 110444878 A CN110444878 A CN 110444878A CN 201910781870 A CN201910781870 A CN 201910781870A CN 110444878 A CN110444878 A CN 110444878A
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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
- 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
- H01Q15/0053—Selective devices used as spatial filter or angular sidelobe filter
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Abstract
The invention discloses a kind of filtering paster antennas with CT coupled structure, the filtering paster antenna includes two layers of dielectric-slab, 1 upper surface of first medium plate is the common ground plate 4 of antenna and coupling circuit, and a rectangle is set on earth plate 4 and couples aperture 7 for the coupling between the 2 upper layer rectangular patch of coupling circuit and second medium plate of 1 lower surface of first medium plate, the coupling circuit of 1 lower surface of first medium plate are collectively formed by the first rank resonator 10, second-order resonator 11, feeder line 9 and input port 8.2 upper surface of second medium plate is rectangular patch 12, and the copper of lower surface is corroded removal;Air layer 6 is provided between two dielectric-slabs.The present invention has preferable impedance matching, high out-of-side rejection and highly selective in its free transmission range, and gain curve is flat, at the same its processing technology simply, cost is relatively low, have preferable application prospect.
Description
Technical field
The present invention relates to antenna technical fields, and in particular to one kind has CT (Cascaded Triplet) coupled structure
Filter paster antenna.
Background technique
Wireless communication technique rapidly develops in recent years, as the 5th third-generation mobile communication technology is increasingly mature and will be in the year two thousand twenty
Front and back formally puts it into commercial operation, and the requirement to system communication capacity and transmission rate also becomes higher.Paster antenna is due to its weight
Gently, small in size, easily conformal, easy processing, it is at low cost the advantages that be widely applied in wireless telecommunication system.What it is in practical application is
The filter of system radio-frequency front-end adds the structure of antenna complex too fat to move.Improvement for paster antenna, many scholars are not by
Its characteristic is studied and improved disconnectedly, the optimization method of many paster antennas is proposed.However some methods will lead to efficiency reduce,
Gain decline, the problems such as directional diagram is unstable.
The prior art is investigated, specific as follows at present there are mainly two types of the design methods of filter antenna:
First method is to introduce parasitic element on antenna structure or introduce band resistance structure at port, is being increased with this
Multiple radiation zeros are formed on the frequency curve of benefit, in the point, radiation of the antenna in main radiation direction is inhibited significantly, thus
The selectivity for realizing gain, reaches filter effect.
In second of design method, antenna is generally regarded as the resonator with radiation function, it not only has
The effect that energy is radiate acts also as the last single order resonator of filter circuit, to form required filter response.
Generally speaking, in existing work, have many relevant researchs, but many designs can introduce additional damage
Consumption, so that efficiency is lower;Again or feeding network is excessively complicated to increase the difficulty of design.Therefore, it designs a simple
Filtering paster antenna be of great significance.
Summary of the invention
The purpose of the present invention is to solve drawbacks described above in the prior art, provide a kind of filter with CT coupled structure
Wave paster antenna.The centre frequency of antenna element of the invention is 3.50GHz, the S in the frequency range of 3.40-3.58GHz11<-
10dB, and the gain in its free transmission range reaches as high as 6.67dBi.Entire antenna structure is relatively simple and processing side
Just, at low cost.
The purpose of the present invention can be reached by adopting the following technical scheme that:
A kind of filtering paster antenna with CT coupled structure, the filtering paster antenna include first medium plate 1,
Second medium plate 2 and the air layer 6 between first medium plate 1 and second medium plate 2;
Wherein, 1 upper surface of first medium plate is provided with earth plate 4,1 lower surface of the first medium plate setting
There are the first copper clad layers 3, be etched with the first rank resonator 10, second-order resonator 11 and feeder line 9 in first copper clad layers 3,
It is provided with coupling aperture 7 on the earth plate 4, input is provided between first medium plate upper surface and the copper clad layers of lower surface
Port 8;
2 upper surface of second medium plate is provided with second copper-clad layer 5, is etched on second copper-clad layer 5 as antenna
Rectangular patch 12;
Wherein, the feeder line 9 is connected directly with input port 8, the feeder line 9, the first rank resonator 10, second-order
Resonator 11 is vertically arranged point-blank, is mutually not attached to;The feeder line 9, the first rank resonator 10 and the first rank are humorous
There is coupling gap between vibration device 10, second-order resonator 11, signal carries out coupling propagation by coupling gap;The coupling aperture
Diameter 7 is arranged above the first rank resonator 10, second-order resonator 11.
Further, input signal is inputted by the input port 8, after connected feeder line 9, successively by the
Single order resonator 10, second-order resonator 11, the coupling of coupling aperture 7 are propagated, finally, traveling to rectangle by the coupling of coupling aperture 7
Patch 12 carries out aerial radiation propagation.
Further, the feeder line 9 is of an L-shaped structure.
Further, the first rank resonator 10, second-order resonator 11 are U-shaped structure, and opening direction is consistent.
Further, the rectangular patch 12 is located at the top in the coupling aperture 7.
Further, by adjusting feeder line 9, the first rank resonator 10, the mutual coupling gap of second-order resonator 11
Width, length, the degree of coupling between each unit is adjusted.
Further, by adjusting the length of the first rank resonator 10, second-order resonator 11, resonator is adjusted respectively and is existed
Impedance matching effect at each self-resonant frequency.
Further, the first rank resonator 10 and second-order resonator 11 are half-wave resonator.
Further, the first medium plate 1, second medium plate 2, air layer 6 thickness be mm grades;And air
The thickness of layer 6 is greater than the thickness of first medium plate 1, second medium plate 2.
The present invention has the following advantages and effects with respect to the prior art:
1, the filtering paster antenna proposed by the present invention with CT coupled structure is shown very at centre frequency 3.5GHz
Radiation characteristic is penetrated on good side.
2, gain curve of the filtering paster antenna proposed by the present invention with CT coupled structure in its free transmission range is flat
It is smooth, reach as high as 6.67dBi.
3, the filtering paster antenna proposed by the present invention with CT coupled structure has good resistance in its free transmission range
Anti- matching, high out-of-side rejection and highly selective.
4, the filtering paster antenna proposed by the present invention with CT coupled structure, design process is simple, handling ease, weight
Gently, at low cost, it has a good application prospect.
Detailed description of the invention
Fig. 1 is a kind of 3D structure chart of filtering paster antenna with CT coupled structure disclosed by the invention;
Fig. 2 is a kind of dielectric structure figure of filtering paster antenna with CT coupled structure disclosed by the invention;
Fig. 3 is a kind of rectangular patch structure chart of filtering paster antenna with CT coupled structure disclosed by the invention;
Fig. 4 is a kind of coupling aperture of filtering paster antenna with CT coupled structure disclosed by the invention, micro-band resonance
Device and feeder line structure figure;
Fig. 5 is reflection coefficient and the gain emulation of a kind of filtering paster antenna with CT coupled structure disclosed by the invention
Test result figure;
Fig. 6 is a kind of E- surface radiation directional diagram of filtering paster antenna with CT coupled structure disclosed by the invention;
Fig. 7 is a kind of H- surface radiation directional diagram of filtering paster antenna with CT coupled structure disclosed by the invention;
Wherein, 1- first medium plate, 2- second medium plate, 3- are located at the first copper clad layers of first medium plate lower surface, 4-
Earth plate positioned at first medium plate upper surface, 5- are located at the second copper-clad for being used to place antenna of second medium plate upper surface
Layer, air layer of the 6- between first medium plate and second medium plate, 7- are located at the coupling aperture on earth plate, 8- input terminal
Mouthful, 9- is located at the feeder line of the first copper clad layers, and 10- is located at the first rank resonator of the first copper clad layers, and 11- is located at the first copper clad layers
Second-order resonator, 12- are located at the rectangular patch of second copper-clad layer.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment
As shown in Figure 1, it is shown that a kind of 3D structure chart of filtering paster antenna with CT coupled structure of the invention.Its
Middle feeder line 9, the first rank resonator 10, these three parts of second-order resonator 11 are respectively positioned on the first copper clad layers 3, and rectangular patch 12
In second copper-clad layer 5, the first copper clad layers 3 do not mark in the figure with second copper-clad layer 5.The antenna uses double-layer structure, as
The rectangular patch of radiation source is placed in positioned at the upper surface of top dielectric plate, and filter circuit is placed in the following table of layer dielectric plate
Face, size of such setting slightly to increase vertical direction greatly reduce the size of horizontal direction, favorably as cost
In the miniaturization of antenna entirety.
As shown in Figure 2,3, 4, present embodiment discloses a kind of filtering paster antennas with CT coupled structure, including first
Dielectric-slab 1, second medium plate 2 and the air layer 6 between first medium plate 1 and second medium plate 2.
Wherein, 1 upper surface of first medium plate is provided with earth plate 4, and 1 lower surface of first medium plate is provided with the first copper clad layers
3, the first rank resonator 10, second-order resonator 11 and feeder line 9 are etched in the first copper clad layers 3, are provided with coupling on earth plate 4
Aperture 7 is provided with input port 8 between first medium plate upper surface and the copper clad layers of lower surface.
Wherein, 2 upper surface of second medium plate is provided with second copper-clad layer 5, is etched on second copper-clad layer 5 as antenna
Rectangular patch 12.
Wherein, feeder line 9 is connected directly with input port 8, and the first rank resonator 10, second-order resonator 11 are U-shaped structure,
Opening direction is consistent.This filter circuit can introduce zero point in the high frequency side of passband.Adjust the opening side of second-order resonator 11
To changing the coupled structure between the first rank resonator 10 and second-order resonator 11, dead-center position can be made to change.
Feeder line 9, the first rank resonator 10, second-order resonator 11 are vertically arranged point-blank, are mutually not attached to, feeder line
9, there is coupling gap between the first rank resonator 10 and the first rank resonator 10, second-order resonator 11, signal passes through coupling
Gap carries out coupling propagation.Wherein, the first rank resonator 10, second-order resonator 11 are vertically arranged on same straight line with reality
Now magnetic coupling between the two.It couples aperture 7 to be arranged above the first rank resonator 10, second-order resonator 11, from each other
It is not physically connected, cross-coupling between the first rank resonator 10 and rectangular patch 12 may be implemented in this way and second-order is humorous
Main coupling between vibration device 11 and rectangular patch 12.
Input signal is inputted by input port 8, after connected feeder line 9, successively by the first rank resonator 10, the
Second order resonator 11, the coupling of coupling aperture 7 are propagated, finally, traveling to rectangular patch 12 by the coupling of coupling aperture 7 carries out antenna spoke
Penetrate propagation, wherein rectangular patch 12 can be considered as third rank resonator.
The present embodiment design in first medium plate 1, second medium plate 2 dielectric constant be 2.55, loss angle tangent is
0.0029.The thickness of first medium plate 1 and second medium plate 2 is 0.8mm;Air layer 6 with a thickness of 1.0mm.
It is shown in Figure 2, it is shown that a kind of medium knot of the filtering paster antenna with CT coupled structure in the present embodiment
Composition, entire antenna are made of two layers of dielectric-slab and one layer of air layer.Air layer can reduce the effective dielectric constant of medium, main
If in order to improve the gain of antenna and bandwidth.
It is shown in Figure 3, it is shown that a kind of rectangle patch of the filtering paster antenna with CT coupled structure in the present embodiment
The illustraton of model of piece, primary radiation source of the rectangular patch 12 as entire antenna element.Rectangular patch be located at coupling aperture 7 just on
Side, the rectangular patch both can be used as the radiation source of greater efficiency, and be also able to achieve the function of third rank resonator;Meanwhile this
The patch of kind shape can largely reduce the difficulty of design and processing.
It is shown in Figure 4, it is shown that a kind of feed knot of the filtering paster antenna with CT coupled structure in the present embodiment
Structure and filter circuit.First rank resonator 10 is with second-order resonator 11 by coupling aperture 7 and as third rank resonator
Rectangular patch 12 coupled.Input port 8 is connected directly with feeder line 9, by presenting entire antenna input port 8
Electricity.
Feeder line 9, the first rank resonator 10, second-order resonator 11 are not physically connected between each other, are coupled and are connected by gap
It connects.Feeder line 9, the first rank resonator 10, the width of coupling gap, length between second-order resonator 11 are adjusted, it can be to each
The degree of coupling between unit is adjusted to meet design requirement.Adjust the length of the first rank resonator 10, second-order resonator 11
Degree, impedance matching effect of the resonator at each self-resonant frequency can be adjusted respectively, can according to actual design requirement into
Row adjusting appropriate.
Setting coupling aperture 7 on corresponding earth plate 4, changes on earth plate 4 below 12 center of rectangular patch
Electric current, the electric current in this position is maximum, so that generating maximum coupling to rectangular patch 12 by coupling aperture 7.On the other hand,
It is more slow in the curent change of 12 immediate vicinity of rectangular patch, therefore the specific location for coupling aperture 7 requires not very sternly
Lattice.The setting key in coupling aperture 7 is its size, adjusts length, the width in coupling aperture 7, can make rectangular patch 12
Good impedance matching effect is obtained at its resonance frequency.
Wherein the first rank resonator 10 and second-order resonator 11 are half-wave resonator, in order to make the knot of entire antenna
Structure is more compact, has all carried out bending appropriate to the first rank resonator 10 and second-order resonator 11, makes it that U-shaped knot be presented
Structure.And it can be seen that by coupling aperture 7, in addition to the first rank resonator 10 and the rectangular patch as third rank resonator
12 exist except coupling, also exist between second-order resonator 11 and rectangular patch 12 and couple.
It is shown in Figure 5, it is shown that a kind of reflection system of the filtering paster antenna with CT coupled structure in the present embodiment
Several emulation and test result figure with gain.From simulation result, it can be seen that, S11 < -10dB frequency range is 3.40-
3.58GHz frequency separation;And in the frequency range in 3.40-3.58GHz, flat gain is maintained at 6.6dBi or so,
Reach as high as 6.67dBi.Test result and simulation result are close.
In the present embodiment, for passing through the signal that feeder line 9 enters the first rank resonator 10 from input port 8, exist
Two different paths make it travel to rectangular patch 12.Wherein, main path is that signal passes sequentially through the first rank resonator 10, the
It is transferred to rectangular patch 12 through overcoupling aperture 7 after second order resonator 11, secondary path is that signal passes through after the first rank resonator 10
Rectangular patch is transferred to by coupling aperture 7.Magnetic coupling is coupled as between first rank resonator 10 and second-order resonator 11.
When the signal by two different paths eventually arrives at rectangular patch 12, there are 180 ° of phases between two paths of signals
Difference, to can cancel out each other, so at i.e. 3.7GHz, occurring a suppression level in the upper edge of passband and reaching 38.8dB's
Zero point.
It can be seen that a kind of filtering paster antenna with CT coupled structure in the present embodiment in emulation and test result
There are three recess for reflection coefficient curve, this can confirm that there are three resonators, i.e. two half-wavelengths in the filter antenna
Micro-strip resonantor and rectangular patch.Curve reflects antenna with three rank filter responses, two of them resonance frequency and the first rank
Resonator 10 is related to second-order resonator 11, another resonance frequency is then related to rectangular patch 12.
It is shown in Figure 6, it is shown that a kind of filtering paster antenna with CT coupled structure of the invention is in centre frequency
The face the E- directional diagram at place.
It is shown in Figure 7, it is shown that a kind of filtering paster antenna with CT coupled structure of the invention is in centre frequency
The H-pattern at place.
By E- directional diagram and H-pattern it can be seen that at centre frequency 3.5GHz, one kind has in this example
The filtering paster antenna of CT coupled structure may be implemented the preferable side of effect and penetrate radiation characteristic, and test result and simulation result coincide
Degree is preferable.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (9)
1. a kind of filtering paster antenna with CT coupled structure, which is characterized in that the filtering paster antenna includes first
Dielectric-slab (1), second medium plate (2) and the air layer (6) between first medium plate (1) and second medium plate (2);
Wherein, described first medium plate (1) upper surface is provided with earth plate 4, first medium plate (1) the lower surface setting
Have the first copper clad layers (3), the first rank resonator (10), second-order resonator (11) are etched in first copper clad layers (3)
With feeder line (9), coupling aperture (7), the copper clad layers of first medium plate upper surface and lower surface are provided on the earth plate (4)
Between be provided with input port (8);
Described second medium plate (2) upper surface is provided with second copper-clad layer (5), and second copper-clad layer is etched on (5) as day
The rectangular patch (12) of line;
Wherein, the feeder line (9) is connected directly with input port (8), the feeder line (9), the first rank resonator (10),
Second order resonator (11) is vertically arranged point-blank, is mutually not attached to;The feeder line (9), the first rank resonator (10) with
And having coupling gap between the first rank resonator (10), second-order resonator (11), signal carries out coupling biography by coupling gap
It broadcasts;Coupling aperture (7) setting is above the first rank resonator (10), second-order resonator (11).
2. a kind of filtering paster antenna with CT coupled structure according to claim 1, which is characterized in that input signal
It is inputted by the input port (8), after connected feeder line (9), successively passes through the first rank resonator (10), second-order
Resonator (11), coupling aperture (7) coupling are propagated, finally, traveling to rectangular patch (12) by coupling aperture (7) coupling carries out day
Beta radiation is propagated.
3. a kind of filtering paster antenna with CT coupled structure according to claim 1, which is characterized in that the feedback
Line (9) is of an L-shaped structure.
4. a kind of filtering paster antenna with CT coupled structure according to claim 1, which is characterized in that described
Single order resonator (10), second-order resonator (11) are U-shaped structure, and opening direction is consistent.
5. a kind of filtering paster antenna with CT coupled structure according to claim 1, which is characterized in that the square
Shape patch (12) is located at the top in the coupling aperture (7).
6. a kind of filtering paster antenna with CT coupled structure according to claim 1, which is characterized in that pass through adjusting
The width of the mutual coupling gap of feeder line (9), the first rank resonator (10), second-order resonator (11), length, to each list
The degree of coupling between member is adjusted.
7. a kind of filtering paster antenna with CT coupled structure according to claim 1, which is characterized in that pass through adjusting
The length of first rank resonator (10), second-order resonator (11) adjusts impedance of the resonator at each self-resonant frequency respectively
Matching effect.
8. a kind of filtering paster antenna with CT coupled structure according to claim 1, which is characterized in that described
Single order resonator (10) and second-order resonator (11) are half-wave resonator.
9. a kind of filtering paster antenna with CT coupled structure according to claim 1, which is characterized in that described
One dielectric-slab (1), second medium plate (2), air layer (6) thickness be mm grades;And the thickness of air layer (6) is greater than first
The thickness of dielectric-slab (1), second medium plate (2).
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112186357A (en) * | 2020-09-17 | 2021-01-05 | 华南理工大学 | Dual-polarized filtering patch antenna based on resonator type probe feed |
CN116722342A (en) * | 2023-08-09 | 2023-09-08 | 安徽蓝讯通信科技有限公司 | Millimeter wave filtering super-surface antenna module and communication equipment |
Citations (1)
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CN210430100U (en) * | 2019-08-23 | 2020-04-28 | 华南理工大学 | Filtering patch antenna with CT coupling structure |
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CN210430100U (en) * | 2019-08-23 | 2020-04-28 | 华南理工大学 | Filtering patch antenna with CT coupling structure |
Non-Patent Citations (1)
Title |
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C. X. MAO等: "Integrated Filtering-Antenna with Controllable Frequency Bandwidth", 2015 9TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP)》, pages 1 - 4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112186357A (en) * | 2020-09-17 | 2021-01-05 | 华南理工大学 | Dual-polarized filtering patch antenna based on resonator type probe feed |
CN112186357B (en) * | 2020-09-17 | 2021-11-19 | 华南理工大学 | Dual-polarized filtering patch antenna based on resonator type probe feed |
CN116722342A (en) * | 2023-08-09 | 2023-09-08 | 安徽蓝讯通信科技有限公司 | Millimeter wave filtering super-surface antenna module and communication equipment |
CN116722342B (en) * | 2023-08-09 | 2023-10-10 | 安徽蓝讯通信科技有限公司 | Millimeter wave filtering super-surface antenna module and communication equipment |
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