CN109273851A - A kind of high efficiency near field focus antenna based on plane bore array - Google Patents
A kind of high efficiency near field focus antenna based on plane bore array Download PDFInfo
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- CN109273851A CN109273851A CN201811105447.XA CN201811105447A CN109273851A CN 109273851 A CN109273851 A CN 109273851A CN 201811105447 A CN201811105447 A CN 201811105447A CN 109273851 A CN109273851 A CN 109273851A
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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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Abstract
The invention discloses a kind of high efficiency near field focus antennas based on plane bore array, belong to antenna works technical field.The antenna includes the antenna stack being arranged from top to bottom, coupled chamber layer and transmission network network layers.For antenna by one point four of microstrip power divider to four groups of linear array feeds, microstrip line has motivated the electromagnetic wave propagated in the waveguiding structure that metallization VIA is constituted by two layers of coupling slot and one layer of coupling throughhole, and generates radiation in radius.It is focused to realize, phase distribution required for different linear arrays is provided by microstrip line, and the different radius inside linear array are chosen in position, and the electromagnetic wave phase given off is made to meet focused condition.The flat focus antenna only needs one point of four microstrip power divider to motivate, and almost without loss inside linear array, structure is simple, radiation efficiency is high.
Description
Technical field
The invention belongs to antenna works technical fields, are related to a kind of near field focus antenna, the antenna energy is in luxuriant and rich with fragrance alunite
The focus designed in your area is assembled.
Background technique
In recent years, the antenna of near field focus has been applied to radio frequency identification (RFID), industrial detection, microwave heat therapeutic, gate inhibition
The fields such as system, wireless energy transfer (WPT), microwave imaging, have obtained extensive concern.Such as in a kind of microstrip array circle of patent
A kind of focusing anteena array of circular polarisation is proposed in polarization focusing anteena (CN201510222283), is used for efficient microwave
Delivery of energy.It proposes a kind of planar array focusing anteena (CN201410799934) suitable for microwave heat therapeutic of patent for micro-
The focusing anteena battle array of wave thermotherapy.One kind is proposed in patent microwave beam focusing rotary scanning device (CN201110352013)
It can be used for the focusing scanning means in microwave imaging field.In such applications, target is located at the near field (Fresnel region) of antenna,
Therefore it is indifferent to the far field radiation characteristics of antenna, and its energy is needed to realize high efficiency near field focus.
Realize that the antenna form of near field focus is varied, traditional method is saturating plus medium using a feed antenna
Mirror, the team of Ahmed A.Kishk propose improved planar lens, can simply be processed with PCB technology.The group of P.Nepa
Team proposes a kind of reflective array antenna near field focus.This few class antenna requires additional feed, therefore whole section
It is high.The team of Eva Rajo-Iglesias proposes several focusing anteenas based on modulation impedance surface, feedback low with section
The simple advantage of electricity.In addition, the array antenna of near field focus, especially microstrip array, have section low, flexible design excellent
Point, but function divides feeding network loss higher.
“Differentially Fed Planar Aperture Antenna with High Gain and Wide
This article of Bandwidth for Millimeter Wave Application " proposes a kind of low section of differential feed
Aperture antenna, in " Planar Aperture Antenna with High Gain and High Aperture
Plane aperture antenna has been extended to linear array in Efficiency for 60-GHz Applications ".Such antenna has feedback
The advantages that electric simple, low section, high efficiency.
Summary of the invention
The present invention proposes a kind of novel flat focus antenna, the antenna is by four groups of planes on the basis of background technique
Aperture antenna linear array composition, is fed by one one point four of micro-strip power division network, and passes through coupling throughhole coupling excitation four
Group linear array.Inventive antenna has near field radiation characteristic similar with conventional microstrip focusing array, but does not need huge feed
Network has the advantages that structure simple, low-loss, efficient.
The technical solution adopted by the invention is as follows:
A kind of high efficiency near field focus antenna based on plane bore array, including antenna stack, the coupling being arranged from top to bottom
Close cavity layer and transmission network network layers.
The antenna stack include first medium substrate, the rectangular radiation slot array that first medium upper surface of base plate is set,
And the first metal floor of covering first medium base lower surface, the first medium substrate are internally provided with four groups of metallization
The rectangle fence that via hole is constituted, there are four the first coupling slots for setting on first metal floor, and the first coupling slot distinguishes position
In four groups of fence centers.
Every group of metallization VIA fence and its internal rectangular radiation slot array, the first coupling slot constitute a line
Battle array.
The coupled chamber layer is one layer of metal plate, and there are four be located at immediately below the first coupling slot for setting in metal plate
Rectangle coupling throughhole is each responsible for four groups of linear arrays of coupling excitation.The metal plate can support fixed antenna layer and feeding network
The medium substrate of layer and the sub-miniature A connector of feed, increase the mechanical strength of antenna, by the size for optimizing rectangle coupling throughhole
The beamwidth of antenna can also be increased.
The transmission network network layers include second medium substrate, the second metal for being covered in second medium upper surface of base plate
Plate and one point of four micro-strip power division network for being set to base lower surface；There are four second for setting on second metal floor
Coupling slot, and four the second coupling slots are located at the underface of rectangle coupling throughhole.
For the present invention by one point four of microstrip power divider to four groups of linear array feeds, microstrip line passes through two layers of coupling slot and one layer
Coupling throughhole has motivated the electromagnetic wave propagated in the waveguiding structure that metallization VIA is constituted, and generates radiation in radius.For
It realizes and focuses, by microstrip line offer, the different radius inside linear array are chosen at phase distribution required for different linear arrays
Position appropriate makes the electromagnetic wave phase given off meet focused condition.The flat focus antenna only need one one point it is four micro-
Band power splitter motivates, and almost without loss inside linear array, structure is simple, radiation efficiency is high.
Detailed description of the invention
Fig. 1 is the integrally-built 3D view of antenna.Coordinate system only shows direction in figure, the coordinate origin heart in an array.
Fig. 2 is the top view in the several special faces of a linear array in Fig. 1.Wherein (a) is first medium upper surface of base plate, (b)
(c) it is first medium base lower surface for first medium substrate inner section, (d) is metal plate section, (e) is second medium
Upper surface of base plate.
Fig. 3 is the emulation (simu.) of embodiment, actual measurement (meas.) standing wave curve.
Fig. 4 is focal plane (z=200mm) Normalized energy pattern of the emulation of embodiment, unit: dB, frequency
10GHz。
Fig. 5 is the actual measurement focal plane Normalized energy pattern of embodiment, unit: dB, frequency 10GHz.
Specific embodiment
The overall structure of the present embodiment antenna such as Fig. 1, first medium substrate 101 takes the Rogers of 3mm thickness in antenna stack
5880, relative dielectric constant 2.2, loss angle tangent 0.0009；Coupled chamber layer uses the aluminium sheet 105 of 3mm thickness；Transmission network
Second medium substrate 107 is the Rogers 5880 of 0.5mm thickness in network layers.
101 upper surface of first medium substrate is provided with the identical rectangular radiation slot 102 of 80 sizes, length and width difference
For 17.5mm, 8.5mm.First medium substrate is internally provided with the rectangle fence 103 of four groups of metallization VIAs composition, fence overall length
Width is respectively 175mm, 45mm.Being covered in setting on the first metal floor of first medium base lower surface, there are four the first rectangles
Coupling slot 104, length and width are respectively 22.5mm, 2.75mm, and the first rectangular coupling groove is located at four groups of fence centers.
There are four rectangle coupling throughholes 106 for the setting of coupled chamber layer 105, are located at immediately below every group of linear array center, lead to
It crosses and optimizes its size and can improve standing wave, the length and width after optimization are respectively 30mm, 16mm.
Feeding network is micro- by the second metal floor and one point four of lower surface that 107 upper surface of second medium substrate is arranged in
Band power division network 109 is constituted, and four the second rectangles coupling corresponding with rectangle coupling throughhole is additionally provided on the second metal floor
Slot 108, length and width are respectively 27mm, 2mm.
Radius inside linear array is in uneven distribution, what the radius of different location was propagated in the waveguide due to electromagnetic wave
The radiation of delayed phase generation out of phase.By selection radius in place, setting the electromagnetic wave of each slot radiation
The same phase of the focal point of meter；Then by adjusting 104,106,108 dimensionally-optimised linear array standing waves.After the completion of linear array design, with four
Identical linear array interval 50mm structures the formation, and provides focusing phase distribution appropriate by one point four of microstrip line, in focal point reality
Existing pen shape focal spot.Feeding network finally provides 50 Ω microstrip line ports, and optimize standing wave to -10dB hereinafter, can with it is common
Sub-miniature A connector matching is good.
Fig. 3 gives antenna standing wave performance, and test result and simulation result coincide, and slightly above emulates knot in band segment
Fruit, but in -10dB hereinafter, antenna is below -10dB in 9~11GHz frequency band standing internal wave, reach the requirement being normally applied, and have
There is wider bandwidth.Emulation and actual measurement focal plane directional diagram are shown in Fig. 4 and Fig. 5 respectively；Antenna focusing is functional, in focal plane shape
At pen shape focal spot, in the face E, (face xoz) minor level is lower than -10dB, and the face H (face yoz) emulates minor level about -9dB, due to adding
Deviation in work test, is surveyed as -8dB.The focusing anteena near field focus characteristic is similar to traditional focusing array, but feeds knot
Structure is simple, the power division network huge relative to traditional array antenna, is lost low, high-efficient.
Claims (1)
1. a kind of high efficiency near field focus antenna based on plane bore array, including be arranged from top to bottom antenna stack, coupling
Cavity layer and transmission network network layers；
The antenna stack include first medium substrate, the rectangular radiation slot array for being set to first medium upper surface of base plate and
Cover the first metal floor of first medium base lower surface；The first medium substrate is internally provided with four groups of metallization VIAs
The rectangle fence of composition, there are four the first coupling slots for setting on first metal floor, and the first coupling slot is located at four
Group fence center；
The coupled chamber layer is one layer of metal plate, and there are four the rectangle couplings being located at immediately below the first coupling slot for setting in metal plate
Close through-hole；
The transmission network network layers include second medium substrate, the second metal floor for being covered in second medium upper surface of base plate, with
And it is set to one point of four micro-strip power division network of base lower surface；There are four the second couplings for setting on second metal floor
Slot, and four the second coupling slots are located at the underface of rectangle coupling throughhole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811105447.XA CN109273851B (en) | 2018-09-21 | 2018-09-21 | High-efficiency near-field focusing antenna based on planar aperture array |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811105447.XA CN109273851B (en) | 2018-09-21 | 2018-09-21 | High-efficiency near-field focusing antenna based on planar aperture array |
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| Publication Number | Publication Date |
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| CN109273851A true CN109273851A (en) | 2019-01-25 |
| CN109273851B CN109273851B (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811105447.XA Active CN109273851B (en) | 2018-09-21 | 2018-09-21 | High-efficiency near-field focusing antenna based on planar aperture array |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755762A (en) * | 2019-03-14 | 2019-05-14 | 南京信息工程大学 | A near field adapted local cosine transform antenna and focus method applied to RFID |
| CN111244622A (en) * | 2020-01-17 | 2020-06-05 | 浙江大学 | PCB integrated electric scanning antenna of new system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531892A (en) * | 2013-10-24 | 2014-01-22 | 山东国威舜泰卫星通信有限公司 | Low-profile high-gain panel antenna and application thereof |
| CN104716426A (en) * | 2013-12-13 | 2015-06-17 | 华为技术有限公司 | Array antenna |
| CN104852130A (en) * | 2015-03-14 | 2015-08-19 | 西安电子科技大学 | Low-radar-section slot array antenna based on holographic surface |
| US20160204514A1 (en) * | 2015-01-12 | 2016-07-14 | Huawei Technologies Co., Ltd. | Printed circuit board for antenna system |
-
2018
- 2018-09-21 CN CN201811105447.XA patent/CN109273851B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531892A (en) * | 2013-10-24 | 2014-01-22 | 山东国威舜泰卫星通信有限公司 | Low-profile high-gain panel antenna and application thereof |
| CN104716426A (en) * | 2013-12-13 | 2015-06-17 | 华为技术有限公司 | Array antenna |
| US20160204514A1 (en) * | 2015-01-12 | 2016-07-14 | Huawei Technologies Co., Ltd. | Printed circuit board for antenna system |
| CN104852130A (en) * | 2015-03-14 | 2015-08-19 | 西安电子科技大学 | Low-radar-section slot array antenna based on holographic surface |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755762A (en) * | 2019-03-14 | 2019-05-14 | 南京信息工程大学 | A near field adapted local cosine transform antenna and focus method applied to RFID |
| CN109755762B (en) * | 2019-03-14 | 2023-12-01 | 南京信息工程大学 | Focusing method of near-field adaptive focusing antenna applied to RFID |
| CN111244622A (en) * | 2020-01-17 | 2020-06-05 | 浙江大学 | PCB integrated electric scanning antenna of new system |
| CN111244622B (en) * | 2020-01-17 | 2021-04-06 | 浙江大学 | PCB integrated electric scanning antenna of new system |
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| Publication number | Publication date |
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| CN109273851B (en) | 2021-06-01 |
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