CN107482313A - A kind of grading structure wideband resonance chamber antenna - Google Patents
A kind of grading structure wideband resonance chamber antenna Download PDFInfo
- Publication number
- CN107482313A CN107482313A CN201710462733.0A CN201710462733A CN107482313A CN 107482313 A CN107482313 A CN 107482313A CN 201710462733 A CN201710462733 A CN 201710462733A CN 107482313 A CN107482313 A CN 107482313A
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- CN
- China
- Prior art keywords
- antenna
- reflection coating
- floor
- metal
- resonance chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H01Q1/48—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
- H01Q1/36—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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/104—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
Abstract
The invention belongs to cavity antenna technical field, discloses a kind of grading structure wideband resonance chamber antenna, and the grading structure wideband resonance chamber antenna includes：One dieletric reflection coating；The dieletric reflection coating is arranged on the half wavelength position above metal floor；The dieletric reflection coating and metal floor form a resonator, and U-shaped slot patch antenna is placed in inside cavity；The metal wedge structure for being arranged above highly gradient of the metal floor；Described graded metal wedge structure can significantly improve the gain bandwidth of cavity antenna, while keep the characteristic of its low section.The section height of inventive antenna is only the half-wavelength of centre frequency；Using the measure such as loading graded metal wedge structure and reduction reflection coating caliber size, the phase difference as caused by different reflection paths between floor and reflection coating is compensate for, makes the field distribution in resonator more uniform；The gain of antenna is higher than 15dBi, and 3dB gain bandwidths bring up to 22.6% by 11.3%.
Description
Technical field
The invention belongs to cavity antenna technical field, more particularly to a kind of grading structure wideband resonance chamber antenna.
Background technology
Current cavity antenna is made up of feed, floor and reflection coating.Cavity antenna belongs to the model of narrow-band antenna
Farmland.Because the reflection amplitudes and phase that reflect coating all have frequency selective characteristic, the resonance height of resonator also becomes with frequency
Change is very sensitive, therefore the gain bandwidth of cavity antenna is narrow.
The means for expanding cavity antenna gain bandwidth at this stage can be largely classified into following two class：
Prior art one is the structure of optimization reflection coating.Using the frequency-selective surfaces of unit size gradual change as resonance
The reflecting surface of chamber antenna or floor, the gain of antenna can be improved and extend its gain bandwidth.This method is by by antenna
Radiation field plane wave is converted into by spherical wave, so as to reach the purpose of broadening bandwidth.Reflected in addition, being constructed using multilayer dielectricity
Coating, can make frequency-phase response have positive slope variation characteristic, and gain bandwidth is expanded with this, but such a process increases
The section height of cavity antenna.Taking the method for both the above optimization reflection coating all can make the design of cavity antenna more
Complexity, to the improvement of gain bandwidth performance also than relatively limited.
Prior art two is by the use of array antenna as feed actuating cavity antenna, makes the field distribution in resonator more equal
Even, realization more effectively radiates, so as to broadening gain bandwidth.More feedbacks are changed into from single feedback due to the feed antenna of resonator, it is necessary to
Load extra work(and divide feeding network, introducing energy loss reduces the radiation efficiency of antenna, cavity antenna is lost spoke
The advantages of penetrating efficiency high.
In summary, the problem of prior art is present be：The method of cavity antenna gain bandwidth is expanded at this stage to property
It can improve than relatively limited, not make full use of the inner space of cavity antenna not only, also materially increase antenna
Design complexities, reduce the radiation efficiency of antenna.
The content of the invention
The problem of existing for prior art, the invention provides a kind of grading structure wideband resonance chamber antenna.
The present invention is achieved in that a kind of grading structure wideband resonance chamber antenna, the grading structure wideband resonance chamber
Antenna includes：
One dieletric reflection coating；
The dieletric reflection coating is arranged on the half wavelength position above metal floor；
The dieletric reflection coating and metal floor form a resonator, and U-shaped slot patch antenna is placed in inside cavity.
The metal floor is arranged above highly gradient metal wedge structure.
Further, the dieletric reflection coating is that a block size is slightly less than floor, thickness is situated between for the FR4 of 1/4 waveguide wavelength
Scutum.
Further, the housing depth between the dieletric reflection coating and metal floor meets working frequency half wavelength
Integral multiple.
Further, the feed includes a rectangular patch in the middle part of cavity and a U-shaped gap；Rectangular patch
The upper surface of same thin medium substrate is printed on U-shaped gap, the lower surface of medium substrate is connected with floor.
Further, described its edge shape of graded metal wedge structure is identical with the edge shape of metal floor；Metal wedge
The height of shape structure gradually increases；The position of metal wedge structure extends to floor both sides end at feed antenna medium substrate
End.
Advantages of the present invention and good effect are：
The gain bandwidth of cavity antenna can be significantly improved using loading graded metal wedge structure.This wedge structure
The housing depth that can be gradually reduced between metal floor and dieletric reflection coating, compensate caused phase between different reflection paths
Potential difference, so as to improve the field distribution of radiating aperture, transmitted electromagnetic wave is set to realize in-phase stacking in broader frequency range.Gradual change
Metal wedge structure and metal floor are processed using aluminium sheet as sheet material using integration, both without weight, the cost of increase antenna
And design complexities, also make full use of the internal structure of resonator to reach the purpose for improving antenna radiation performance, make gain bandwidth
Increase to 20.3% by 11.3%.
The gain bandwidth of cavity antenna can be further improved using the method for reduction reflection coating caliber size.Bore
Less reflection coating can increase the boundling ability of wave beam, realize more effectively radiation, gain bandwidth is improved by 20.3%
To 22.6%.
Compared with the means that tradition expands cavity antenna gain bandwidth, method proposed by the present invention has the advantage that：
1st, compared with prior art one, the present invention need to only use the reflection coat structure of individual layer, and antenna has very low put down
The advantages of facial contour and portable construction；Prior art one exceedes due to introducing reflection multilayer coat structure, the height of usual antenna
One wavelength.The section height of inventive antenna is only half wavelength；Using dieletric reflection coat structure, design side is simplified
Method, it is easily manufactured and installed, the characteristic of its low section is kept while cavity antenna gain bandwidth is improved.
2nd, compared with prior art two, the present invention only need to be not required to array antenna as feed by coaxial single-point feedback, from
And the design cycle of complicated feed network is eliminated, eliminate the energy loss as caused by feeding network.The present invention is using loading
The measure such as graded metal wedge structure and reduction reflection coating caliber size, compensate for the phase difference between reflection path, makes humorous
The field distribution for intracavitary of shaking is more uniform, the gain of antenna is higher than 15dBi, 3dB gain bandwidths bring up to 22.6% by 11.3%.
The present invention can significantly improve resonator day on the basis of resonator section height and feed complexity is not influenceed
The field distribution of beta radiation bore, the gain bandwidth of cavity antenna is set to improve 11.3%, and resistance of this method to antenna
Anti- bandwidth and gain performance influence minimum.
Brief description of the drawings
Fig. 1 is grading structure wideband resonance chamber antenna structure view provided in an embodiment of the present invention；
Fig. 2 is the structural decomposition diagram of cavity antenna provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of graded metal wedge structure provided in an embodiment of the present invention；
Fig. 4 is the structural parameters schematic diagram of feed provided in an embodiment of the present invention；
Fig. 5 is the radiation theory schematic diagram of cavity antenna；
Fig. 6 is test " reflectance factor-frequency " response curve schematic diagram provided in an embodiment of the present invention；
Fig. 7 is test " gain versus frequency " response curve schematic diagram provided in an embodiment of the present invention；
In figure：1st, dieletric reflection coating；2nd, feed antenna；2-1, rectangular patch；2-2, U-shaped gap；2-3, thin-medium base
Plate；3rd, floor；4th, graded metal wedge structure.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The application principle of the present invention is explained in detail below in conjunction with the accompanying drawings.
As Figure 1-Figure 4, grading structure wideband resonance chamber antenna provided in an embodiment of the present invention includes：Dieletric reflection covers
Layer 1, feed antenna 2, floor 3, graded metal wedge structure 4.
Dieletric reflection coating 1 is arranged on the position of the half wavelength above metal floor 3, dieletric reflection coating 1 and ground
Plate 3 forms a resonator, and floor 3 is arranged above highly gradient metal wedge structure 4, and U-shaped slot patch antenna 2 is put
In inside cavity.
Dieletric reflection coating 1 is the FR4 dielectric-slabs that a block size is slightly less than floor, thickness is 1/4 waveguide wavelength.
Housing depth between dieletric reflection coating 1 and floor 3 meets the integral multiple of working frequency half wavelength.
Feed antenna 2 includes a rectangular patch in the middle part of cavity and a U-shaped gap, rectangular patch 2-1 and U
Shape gap 2-2 is printed on same thin medium substrate 2-3 upper surface, and medium substrate 2-3 lower surface is connected with floor 3.
Graded metal wedge structure 4 is placed in the surface on floor 3, and its edge shape is identical with the edge shape on floor 3, high
Gradually increase, placement location extend to 3 liang of floor lateral terminal to degree at the medium substrate 2-3 of feed antenna.
Fig. 3 and Fig. 4 gives the structural representation and parameter definition of graded metal wedge structure 4 and feed 2 in the present invention.
The method provided by the invention for improving cavity antenna gain bandwidth, which is included on floor, is loaded with gradual change form
Wedge structure, and reduction reflection coating caliber size；Cavity antenna in this way is by feed, dieletric reflection
Coating, metal floor and metal gradient wedge structure are formed.On dielectric coatings occupy, floor occupies with metal gradient wedge structure
Under, both form a cavity body structure, and feed is placed in inside cavity.Dielectric coatings are that a block size is slightly less than floor, thickness is
The FR4 dielectric-slabs of 1/4 waveguide wavelength；Feed is the U-shaped slot patch antenna by fed by coaxial probe；Metal gradient wedge structure
It is placed in directly over floor, placement location extends to floor terminal at feed medium substrate.
The radiation theory of the cavity antenna of the present invention is as follows：By the electromagnetic wave irradiation that feed is sent to dieletric reflection coating
On, wherein small part energy transmission crosses dieletric reflection coating, and most of energy is reflected by dieletric reflection coating.Electromagnetic wave is in medium
Pass through multiple reflection and transmission between reflection coating and floor, (Fig. 5) is gradually propagated to edge from center.When floor and reflection
When the distance between coating is approximately equal to the integral multiple of half wavelength, the electromagnetic wave of transmission can realize in-phase stacking, therefore resonance
The gain of chamber antenna is improved.
Using the U-shaped slot patch antenna of coaxial feed as feed, compared with conventional patch antenna structure, pass through introducing
New resonance broadening antenna frequency band, and antenna has narrower lobe width and stronger beam direction, is advantageous to improve day
The entire gain of line.
Using the metal wedge structure that highly gradient is loaded on floor, the gain bandwidth of cavity antenna is carried by 11.3%
Height is to 20.3%, and this structure is to the impedance bandwidth and gain effects very little of antenna.Operation principle is as follows：Graded metal wedge
Shape structure makes floor be gradually reduced with reflecting the distance between coating, and the phase difference intra resonant cavity difference reflection path is entered
The rational compensation of row, the electromagnetic wave for alloing to transmit reflection coating in-phase stacking in broader frequency range, so as to improve
The gain bandwidth of cavity antenna.
The parameter of graded metal wedge structure is as follows to the performance impact of cavity antenna：
1) original position L1The impedance bandwidth of antenna is not influenceed, but the gain bandwidth of antenna is with L1Increase and gradually subtract
Small, the highest-gain of antenna is with L1Increase present first reduce after increased trend；
2) height H1The impedance bandwidth of antenna is not influenceed, and the gain bandwidth of antenna is with H1Increase and gradually step up, but antenna
Highest-gain be gradually reduced.Because the highest-gain and gain bandwidth of antenna mutually restrict, should roll in the design process
Inner feelings considers relation between the two.
It is slightly less than the reflection coating of ground board size using bore, the gain of cavity antenna improves 0.3dB, and impedance bandwidth carries
High by 2%, gain bandwidth improves more than 2%.Its operation principle is as follows：When only an antenna is as feed, reduction reflection is covered
Layer bore can reduce the Q values of resonator, feed antenna is more effectively irradiated reflection coating, more energy are limited in into chamber
Internal portion, so as to improve the aperture efficiency of cavity antenna, improve antenna gain and improve gain bandwidth.
The application principle of the present invention is further described with reference to embodiment.
Embodiment 1
Using FR4 sheet materials thick 6.5mm as dieletric reflection coating 1, size 90mm*90mm；It is processed into save
This, mitigates antenna overall weight, using aluminium sheet as floor 3 and the sheet material of graded metal wedge structure 4, can also use other gold
Category is as floor 3 and the processing sheet material of graded metal wedge structure 4；Floor 3 and the Outside Dimensions phase of graded metal wedge structure 4
Together：L=150mm, W=150mm；The thickness on floor 3 is 1mm；The size of graded metal wedge structure 4 is：H1=8mm；Medium
The housing depth for reflecting coating 1 and the composition of floor 3 is 26.5mm；Feed paster 2-1 is printed on thickness as 3.175mm, relative Jie
Electric constant is that medium substrate 2-3 structural parameters are on 2.2 medium substrate 2-3：L1=45mm, W1=45mm；Fed patch
2-1 and U-shaped gap 2-2 structural parameters are respectively：L2=30mm, W2=15mm, L3=10mm, L4=9mm, W3=1mm, W4=
2mm；The centre frequency of Antenna Design is 5.6GHz, and wavelength corresponding to centre frequency is 53.6mm.
Fig. 6 provides test " reflectance factor-frequency " response curve of the present embodiment antenna, and the impedance bandwidth of antenna is
35.7%.Fig. 7 gives test " gain versus frequency " response curve of the present embodiment antenna, and the maximum gain of antenna is 16dBi,
It is 22.6% that gain, which declines gain bandwidth corresponding to 3dB, and the bandwidth than no loading graded metal wedge structure improves
11.3%.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (5)
1. a kind of grading structure wideband resonance chamber antenna, it is characterised in that the grading structure wideband resonance chamber antenna includes：
One dieletric reflection coating；
The dieletric reflection coating is arranged on the half wavelength position above metal floor；
The dieletric reflection coating and metal floor form a resonator, and U-shaped slot patch antenna is placed in inside cavity conduct
Feed antenna；
The metal floor is arranged above highly gradient metal wedge structure.
2. grading structure wideband resonance chamber antenna as claimed in claim 1, it is characterised in that the dieletric reflection coating is one
The FR4 dielectric-slabs that block size is slightly less than floor, thickness is 1/4 waveguide wavelength.
3. grading structure wideband resonance chamber antenna as claimed in claim 1, it is characterised in that the dieletric reflection coating and gold
Housing depth between the plate of possession meets the integral multiple of working frequency half wavelength.
4. grading structure wideband resonance chamber antenna as claimed in claim 1, it is characterised in that the feed antenna includes one
Rectangular patch and a U-shaped gap in the middle part of cavity；Rectangular patch and U-shaped gap are printed on same thin medium substrate
Upper surface, the lower surface of medium substrate are connected with metal floor.
5. grading structure wideband resonance chamber antenna as claimed in claim 1, it is characterised in that the graded metal wedge structure
Its edge shape is identical with the edge shape of metal floor；The height of metal wedge structure gradually increases；Metal wedge structure
Placement location extends to the lateral terminal of metal floor two at the medium substrate of feed antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710462733.0A CN107482313A (en) | 2017-06-19 | 2017-06-19 | A kind of grading structure wideband resonance chamber antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710462733.0A CN107482313A (en) | 2017-06-19 | 2017-06-19 | A kind of grading structure wideband resonance chamber antenna |
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| Publication Number | Publication Date |
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| CN107482313A true CN107482313A (en) | 2017-12-15 |
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|---|---|---|---|
| CN201710462733.0A Pending CN107482313A (en) | 2017-06-19 | 2017-06-19 | A kind of grading structure wideband resonance chamber antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832311A (en) * | 2018-06-08 | 2018-11-16 | 西安电子科技大学 | Plane Cassegrain rotational field antenna based on super surface |
| CN109066080A (en) * | 2018-08-07 | 2018-12-21 | 维沃移动通信有限公司 | A kind of antenna house, antenna structure and radio-based electronic devices |
| CN109390689A (en) * | 2018-12-13 | 2019-02-26 | 舟山麦克斯韦物联网科技有限公司 | A kind of miniaturization broadband high-gain cavity antenna |
| CN110243491A (en) * | 2019-07-02 | 2019-09-17 | 电子科技大学中山学院 | Temperature sensor based on waveguide structure |
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| US20110163930A1 (en) * | 2008-03-18 | 2011-07-07 | Universite Paris Sub (Paris 11) | Steerable Electronic Microwave Antenna |
| US20130222200A1 (en) * | 2012-02-27 | 2013-08-29 | Electronics And Telecommunications Research Institute | High-gain wideband antenna apparatus |
| CN105071051A (en) * | 2015-07-27 | 2015-11-18 | 哈尔滨工业大学 | Improved Fabry-Perot resonant cavity antenna |
| CN204947072U (en) * | 2015-08-26 | 2016-01-06 | 华南理工大学 | Without the filtering paster antenna of additional filter circuit |
| CN205723943U (en) * | 2016-05-09 | 2016-11-23 | 中国人民解放军理工大学 | A kind of broadband Fabry Paro resonant antenna |
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2017
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| US20110163930A1 (en) * | 2008-03-18 | 2011-07-07 | Universite Paris Sub (Paris 11) | Steerable Electronic Microwave Antenna |
| US20130222200A1 (en) * | 2012-02-27 | 2013-08-29 | Electronics And Telecommunications Research Institute | High-gain wideband antenna apparatus |
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| CN204947072U (en) * | 2015-08-26 | 2016-01-06 | 华南理工大学 | Without the filtering paster antenna of additional filter circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832311A (en) * | 2018-06-08 | 2018-11-16 | 西安电子科技大学 | Plane Cassegrain rotational field antenna based on super surface |
| CN108832311B (en) * | 2018-06-08 | 2020-08-11 | 西安电子科技大学 | Planar Cassegrain vortex field antenna based on super surface |
| CN109066080A (en) * | 2018-08-07 | 2018-12-21 | 维沃移动通信有限公司 | A kind of antenna house, antenna structure and radio-based electronic devices |
| CN109390689A (en) * | 2018-12-13 | 2019-02-26 | 舟山麦克斯韦物联网科技有限公司 | A kind of miniaturization broadband high-gain cavity antenna |
| CN110243491A (en) * | 2019-07-02 | 2019-09-17 | 电子科技大学中山学院 | Temperature sensor based on waveguide structure |
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Application publication date: 20171215 |