CN105870619B - A kind of differential filtering micro-strip array antenna with high common mode inhibition - Google Patents
A kind of differential filtering micro-strip array antenna with high common mode inhibition Download PDFInfo
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- CN105870619B CN105870619B CN201610333733.6A CN201610333733A CN105870619B CN 105870619 B CN105870619 B CN 105870619B CN 201610333733 A CN201610333733 A CN 201610333733A CN 105870619 B CN105870619 B CN 105870619B
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- 238000001914 filtration Methods 0.000 title claims abstract description 29
- 230000005764 inhibitory process Effects 0.000 title claims abstract description 14
- 239000000758 substrate Substances 0.000 claims description 21
- 239000011888 foil Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000005284 excitation Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 6
- 230000010287 polarization Effects 0.000 description 5
- 238000005388 cross polarization Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
- H01Q21/0075—Stripline fed arrays
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- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a kind of differential filtering micro-strip array antenna with high common mode inhibition, which includes mainly three-decker：Four patch radiating elements of feeding network, the ground containing gap structure and the resonator excitation containing H-type.Core of the invention content is that antenna is constructed using multilayered structure, preceding two ranks resonator is respectively placed in first layer and third layer, it is coupled by the gap of the second layer, natural high common mode inhibition effect can be reached, this slot-coupled can also make the both ends of second-order resonator form natural 180 degree difference, second-order resonator is set to possess the function of balun, at the same time second-order resonator design can also realize one point four of work(point function at H-type.In the case of not additional cascading filter, increase area, the present invention has good filtering characteristic, has achieved the purpose that miniaturization.Generally speaking the present invention has the characteristics such as highly selective, high common mode inhibition, high-gain, size be small.
Description
Technical field
The present invention relates to the technical fields of wireless communication, refer in particular to a kind of differential filtering micro-strip with high common mode inhibition
Array antenna.
Background technology
In recent years, communication system just develops towards miniaturization, multifunction direction.Antenna and RF/Microwave filter
It as the Primary Component in communication, typically independent design, is then connected by transmission line, but many times antenna and filter
If bandwidth of operation is different, their input impedance tends not to exactly match, this will influence frequency characteristic.If carried out independent
Match circuits, the complication of design can be caused, and increase the size of device.Integrated filter antenna realize filtering and
Dual function is radiated, is conducive to the miniaturization of radio-frequency front-end, the volume and cost of communication equipment can be reduced to a certain extent.
There is differential signal transmission good noiseproof feature, the signal transmission of many communication systems to be all operated in difference shape
State, therefore high performance differential antennae is current one of research hotspot.
The prior art is investigated, it is specific as follows：
(1) periodical：IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, article：A
Filtering Microstrip Antenna Array, author：Chin-Kai Lin, Shyh-Jong Chung, when delivering
Between：11 phases of volume 59 in 2011.
Use four paster antennas as antenna radiation unit in article, feeding network is made of three resonators, feedback
Electric network constitutes the preceding two ranks resonator in filter antenna, and antenna radiation unit constitutes third rank resonator, last total
Constitute the filter array antenna with three rank filtering characteristics.The antenna has good filtering characteristic and radiation characteristic,
But antenna can only single ended input, Differential Input cannot be worked in.
(2) periodical：IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, article：A
Differential Microstrip Antenna with Filtering Response, author：Lin Li, Gang Liu,
Deliver the time：It waits printing within 2016.
Antenna Operation is in Differential Input in article, equally using paster antenna as antenna radiation unit, feeding network structure
At the first rank resonator in filter antenna, antenna radiation unit constitutes second-order resonator, and finally total constitutes tool
There is the differential filtering antenna of second-order filter characteristic.The antenna has a good filtering characteristic, but due to only there are one radiating element,
Antenna gain is to be improved.
Generally speaking, at present in published article and patent, it is difficult to see a filter for being operated in Differential Input
Wave micro-strip array antenna.
Invention content
It is an object of the invention to overcome existing micro-strip array antenna to lack good filtering characteristic and can only single ended input
Defect, provides a kind of differential filtering micro-strip array antenna with high common mode inhibition, which uses planar microstrip structure, have
The advantages that designing simple, small, light-weight processing, function admirable.
To achieve the above object, technical solution provided by the present invention is：A kind of differential filtering with high common mode inhibition
Micro-strip array antenna, including about two pieces stacked plate-like dielectric substrates, respectively first substrate and second substrate, described the
The upper surface metal foil of one substrate is formed with the first microstrip structure, and it is micro- that the lower surface metal foil of the second substrate is formed with second
The contact surface metal foil of band structure, the first substrate and second substrate be formed as ground, and in ground grooving and formed and have the gap knot
Structure；First microstrip structure includes a H-type resonator and four patch radiating elements, four patch radiating elements point
It is not of coupled connections at four ends of H-type resonator；Second microstrip structure includes a resonator and four feed structures,
Four feed structures are respectively the first feed structure, the second feed structure, third feed structure, the 4th feed structure, this is humorous
The device that shakes works in half-wave long pattern, and is placed in parallel with third feed structure and the 4th feed structure, four feed structures with it is humorous
Device energy transmission of shaking realizes that the third feed structure and the first feed structure vertical connection, this by way of slot-coupled
Four feed structures and the second feed structure vertical connection；Above-mentioned gap structure be located at ground center, and with the second microstrip structure
Resonator is vertical；The H-type resonator of first microstrip structure and the resonator of the second microstrip structure pass through slot-coupled, the H
Natural 180 degree is formed at the upper both ends of type resonator and lower both ends to differ, making H-type resonator, not only active point of function also has
The function of balun.
Preceding two rank that the resonator of the H-type resonator of first microstrip structure and the second microstrip structure is constituted in antenna is humorous
Shake device, and four patch radiating elements constitute third rank resonator.
First feed structure and the second feed structure are 50 ohm of feeds.
The third feed structure and the long a quarter waveguide wavelength of the 4th feed structure.
It is bent respectively at four ends of the H-type resonator, preferably patch radiating element to be given to feed.
Compared with prior art, the present invention having the following advantages that and advantageous effect：
1, conventional microstrip array antenna generally requires additional cascading filter to obtain good filtering characteristic, and this micro-strip
Array antenna has intrinsic good filtering characteristic, without adding additional circuit, and then reduces the size of radio-frequency front-end.
2, this micro-strip array antenna works in Differential Input, and there are excellent common-mode rejection properties, antenna integrally to have simultaneously
There are the characteristics such as Differential Input, excellent filtering and high-gain.
3, this micro-strip array antenna is easy to manufacture, at low cost, and planar structure is easily integrated, and is suitable for a variety of communication systems
In system.
Description of the drawings
Fig. 1 is the vertical section sectional view of inventive antenna.
Fig. 2 is the first schematic diagram of a layer structure of inventive antenna.
Fig. 3 is the second schematic diagram of a layer structure of inventive antenna.
Fig. 4 is the third schematic diagram of a layer structure of inventive antenna.
Fig. 5 is the general structure schematic diagram of inventive antenna.
Fig. 6 is that directive gain simulation result is penetrated on the S parameter of inventive antenna and side.
Fig. 7 is the main polarization Direction Pattern Simulation result in inventive antenna faces H at centre frequency.
Fig. 8 is the inventive antenna faces E Direction Pattern Simulation result at centre frequency.
Specific implementation mode
The present invention is further explained in the light of specific embodiments.
The differential filtering micro-strip array antenna integral manufacturing of the present invention is carved on the medium substrate of multilayer copper-clad using machinery
The technologies such as system, laser scoring, circuit board corrosion can easily make.Core of the invention content is that antenna uses multilayer knot
Structure constructs, and preceding two ranks resonator is respectively placed in first layer and third layer, is coupled by the gap of the second layer, can be reached
Natural high common mode inhibition effect, this slot-coupled can also make the both ends of second-order resonator form natural 180 degree phase
Difference makes second-order resonator possess the function of balun, and at the same time second-order resonator design can also realize one point at H-type
Four work(divides function.
The differential filtering micro-strip array antenna of the present invention is produced on two pieces of dielectric constants and is in the manner of a printed circuit board
2.55, thickness is on the polytetrafluoroethylene (PTFE) double-sided copper-clad micro-strip plate of 0.8mm, and structure finally makes two pieces as shown in Fig. 1,2,3,4,5
Plate fits together to realize the function of three layers of circuit.
As shown in Figures 1 to 5, differential filtering micro-strip array antenna of the invention includes mainly about two pieces stacked plates
The upper surface metal foil of dielectric base plate, respectively first substrate 11 and second substrate 10, the first substrate 11 is formed with
The lower surface metal foil of one microstrip structure 15, the second substrate 10 is formed with the second microstrip structure 12,11 He of first substrate
The contact surface metal foil of second substrate 10 be formed as ground 13, and in ground 13 grooving and be formed with gap structure 14；Described first
Microstrip structure 15 includes a H-type resonator 151 and four patch radiating elements 152,153,154,155, four patches
Radiating element 152,153,154,155 is of coupled connections at four ends of H-type resonator 151 respectively, the H-type resonator 151
It is in order to preferably be fed to patch radiating element, by suitably adjusting H-type resonator 151 that bending has been carried out at four ends
Length and width, make it be operated in resonant condition；Second microstrip structure 12 includes a resonator 125 and four feeds
Structure, four feed structures are respectively the first feed structure 121, the second feed structure 122, third feed structure the 123, the 4th
Feed structure 124, the resonator 125 work in half-wave long pattern, and with third feed structure 123 and the 4th feed structure 124
It is placed in parallel, four feed structures are realized with 125 energy transmission of resonator by way of slot-coupled, the first feed knot
Structure 121 and the second feed structure 122 are 50 ohm of feeds, and 123 and the 4th feed structure 124 of the third feed structure is about four
/ mono- waveguide wavelength, 121 vertical connection of the third feed structure 123 and the first feed structure, the 4th feed structure 124 with
Second feed structure, 122 vertical connection；Above-mentioned gap structure 14 be located at ground 13 center, and with the resonance of the second microstrip structure 12
Device 125 is vertical, and whole size is determined by simulation optimization；Due to the H-type resonator 151 of first microstrip structure 15 and
The resonator 125 of two microstrip structures 12 is formed natural at the upper both ends of the H-type resonator 151 and lower both ends by slot-coupled
180 degree difference, making H-type resonator 151, not only active point of function also has the function of balun, meanwhile, when antenna common mode encourages
When, a virtual magnetic wall is formed at 125 intermediate cross-section of resonator of second microstrip structure 12, electric field can not pass through, therefore
Energy can not be coupled to H-type resonator 151 by gap structure 14, and antenna is made to have natural high common-mode rejection properties；It is described
It is humorous that the resonator 125 of the H-type resonator 151 of first microstrip structure 15 and the second microstrip structure 12 constitutes preceding two rank in antenna
Shake device, and four patch radiating elements 152,153,154,155 constitute third rank resonator, therefore the differential filtering of the present invention is micro-
Band array antenna has three rank filtering characteristics.
The working method of entire differential filtering micro-strip array antenna transmitting signal is that electromagnetism differential signal is tied from the first feed
It is inputted at 122 feed of structure 121 and the second feed structure, energy coupling then passes through gap to resonator 125 by resonator 125
Structure 14 is coupled to H-type resonator 151, and H-type resonator 151 again is coupled to four patch radiating elements 152,153,154,155,
It is finally radiate via patch radiating element, the mode for receiving signal is then opposite.
Fig. 6 is the present embodiment antenna | S11 | and directive gain simulation result, S11 are penetrated in sideCCIndicate the S11 of common mode excitation
Parameter, S11DDIndicate the S11 parameters under differential mode excitation.As seen from the figure, S11CCIt is substantially zeroed, it is meant that the signal of common mode excitation
Basic total reflection, antenna have excellent common-mode rejection properties.10dB reflection losses are ranging under the antenna differential mode excitation state
3.44GHz to 3.56GHz, relative bandwidth 3.4%.Antenna gain passband is very gentle, due to the form using array, center
(3.5GHz) gain is 9.2dBi at frequency, is much higher than common non-array microstrip antenna.Meanwhile either S11DDParameter curve
Or the intermediate zone of gain curve, passband and stopband is all very precipitous, and antenna has very high selectivity.
Fig. 7 and Fig. 8 is the main polarization Direction Pattern Simulation result in the faces H and the faces E at the centre frequency of the present embodiment antenna respectively
Direction Pattern Simulation result.The cross polarization of the faces H be less than -80dB, therefore the faces H directional diagram only give it is main polarization.As seen from the figure, antenna
Main polarization -3dB the main lobe widths in the faces H are about 50 degree, front and back than being about 17dB.The cross polarization of the faces E is less than -33dB, main polarization -3dB
Main lobe width is also about 50 degree, and front and back ratio is about 17dB.As it can be seen that antenna has good directional diagram radiation characteristic.
Embodiment described above is only the preferred embodiments of the invention, and but not intended to limit the scope of the present invention, therefore
Change made by all shapes according to the present invention, principle, should all cover within the scope of the present invention.
Claims (5)
1. a kind of differential filtering micro-strip array antenna with high common mode inhibition, it is characterised in that：It is stacked including about two pieces
The upper surface metal foil of plate-like dielectric substrate, respectively first substrate and second substrate, the first substrate is formed with first
The lower surface metal foil of microstrip structure, the second substrate is formed with the second microstrip structure, the first substrate and second substrate
Contact surface metal foil be formed as ground, and in ground grooving and be formed with gap structure；First microstrip structure includes a H-type
Resonator and four patch radiating elements, four patch radiating elements respectively with the company of coupling at four ends of H-type resonator
It connects；Second microstrip structure includes a resonator and four feed structures, which is respectively the first feed
Structure, the second feed structure, third feed structure, the 4th feed structure, the resonator works of the second microstrip structure are in half-wavelength
Pattern, and be placed in parallel with third feed structure and the 4th feed structure, the resonance of four feed structures and the second microstrip structure
Device energy transmission realized by way of slot-coupled, the third feed structure and the first feed structure vertical connection, the 4th
Feed structure and the second feed structure vertical connection；Above-mentioned gap structure is located at the center on ground, and humorous with the second microstrip structure
The device that shakes is vertical；The H-type resonator of first microstrip structure is coupled with the resonator of the second microstrip structure by gap structure, should
At the upper both ends of H-type resonator and lower both ends natural 180 degree is formed to differ, make H-type resonator not only active point function also
There is the function of balun.
2. a kind of differential filtering micro-strip array antenna with high common mode inhibition according to claim 1, it is characterised in that：
Preceding two ranks resonator in the H-type resonator of first microstrip structure and the resonator composition antenna of the second microstrip structure, four
A patch radiating element constitutes third rank resonator.
3. a kind of differential filtering micro-strip array antenna with high common mode inhibition according to claim 1, it is characterised in that：
First feed structure and the second feed structure are 50 ohm of feeds.
4. a kind of differential filtering micro-strip array antenna with high common mode inhibition according to claim 1, it is characterised in that：
The third feed structure and the long a quarter waveguide wavelength of the 4th feed structure.
5. a kind of differential filtering micro-strip array antenna with high common mode inhibition according to claim 1, it is characterised in that：
It is bent respectively at four ends of the H-type resonator, preferably patch radiating element to be given to feed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610333733.6A CN105870619B (en) | 2016-05-19 | 2016-05-19 | A kind of differential filtering micro-strip array antenna with high common mode inhibition |
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| CN105870619B true CN105870619B (en) | 2018-07-20 |
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| CN113013603B (en) * | 2019-12-20 | 2023-05-05 | 南京理工大学 | 4 x 4 broadband microstrip differential antenna array |
| CN112909490B (en) * | 2021-01-21 | 2023-02-28 | 福耀玻璃工业集团股份有限公司 | Be applied to on-vehicle glass antenna and vehicle glass |
| US20240154319A1 (en) * | 2021-12-31 | 2024-05-09 | Beijing Boe Sensor Technology Co., Ltd. | Transparent oscillator unit, transparent antenna and antenna system |
| CN114552210B (en) * | 2022-03-04 | 2023-04-18 | 电子科技大学 | Low-profile millimeter wave filtering antenna |
| CN114336015B (en) * | 2022-03-07 | 2022-07-12 | 华南理工大学 | Feeder filter antenna and communication equipment |
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