CN106329040A - Composite cross slot frequency selective surface (FSS) - Google Patents
Composite cross slot frequency selective surface (FSS) Download PDFInfo
- Publication number
- CN106329040A CN106329040A CN201610803551.0A CN201610803551A CN106329040A CN 106329040 A CN106329040 A CN 106329040A CN 201610803551 A CN201610803551 A CN 201610803551A CN 106329040 A CN106329040 A CN 106329040A
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- layer
- frequency
- selective surfaces
- fss
- copper clad
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
- H01P7/065—Cavity resonators integrated in a substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/425—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising a metallic grid
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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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- Aerials With Secondary Devices (AREA)
- Details Of Aerials (AREA)
Abstract
The invention provides a composite cross slot frequency selective surface (FSS), which is low in insertion loss and wide in frequency band, and has space and frequency bandpass filtering performance. The composite cross slot FSS comprises a single-layer FSS structure and a double-layer FSS structure, wherein the single-layer FSS layered structure comprises a copper clad layer, a substrate layer and a dielectric layer sequentially from top to bottom, the copper clad layer is a periodic metal patch unit formed by a combination of a four-leg loading slot unit and a cross slot unit, and the unit structure is a square periodic structure; the double-layer FSS layered structure comprises a copper clad layer, a substrate layer, a dielectric layer, a substrate layer, and a copper clad layer sequentially from top to bottom, and the copper clad layer patch unit and the periodic structure are the same as the metal patch of the single-layer FSS. The FSS in the structure has the advantages of simple structure, convenient processing and convenient realization.
Description
Technical field
The present invention relates to antenna and microwave technical field, be a kind of low insertion loss, broadband, there is space and frequency band
Frequency-selective surfaces (FSS) structure of pass filter performance.Can be applicable to the equipment such as mobile communication base station, radar, electronic navigation
To reach purpose that is anti-interference and that reduce RCS (RCS) in antenna house.
Background technology
Frequency-selective surfaces (FSS) is a kind of two-dimensionally periodic structure with frequency selective characteristic, as the filter of a kind of space
Ripple device, is widely used on the antenna house in radio communication, radar, electronic warfare system.It is loaded with the sky of frequency-selective surfaces
Irdome is protected except having basic dust-proof, waterproof, wind resistance in addition to the basic function of antenna, is inserted into damage in also having passband
Consumption, Out-of-band rejection are to reduce the frequency selective characteristic of interference.Along with the fast development of mobile communication, and frequency spectrum resource day is becoming tight
The actual requirement opened, antenna for base station has increasing need for more preferable frequency selective characteristic and with Net long wave radiation and reduces between wireless device
Interfere.Additionally, radar, communicate, be also required to the spa-tial filter properties by frequency-selective surfaces between the wireless device such as navigation
Realize electromagnetic compatibility.
Summary of the invention
Technical problem: the technical problem to be solved in the present invention is to provide a kind of bandpass-type and is combined the frequency selection of cross gap
Surface, the band that can use at the antenna equipment (such as on antenna of mobile communication base station cover) that mid frequency is frequency band near 2.6GHz
Flow-through frequency-selective surfaces structure, it has low insertion loss, wide band characteristic.
Technical scheme: the one of the present invention is combined cross gap frequency-selective surfaces by along the both horizontally and vertically cycle
Property the periodic unit that extends constitute, described periodic unit is rectangle, and it is single that the structure of each of which unit is loaded gaps by four lower limbs
Unit, cross gap combination are constituted, mutually isolated between the gap of different units.
When described gap frequency-selective surfaces is monolayer frequency-selective surfaces, monolayer frequency-selective surfaces structure comprises 3
Layer medium, the most successively: copper clad layers, substrate layer, dielectric layer；Wherein:
Copper clad layers is attached to substrate layer surface, prints layer for frequency-selective surfaces periodic structure；
Substrate layer is attached to dielectric layer surface, for conventional lamellae substrate media material layer, has the feature being prone to general character；
Dielectric layer is the antenna house that mobile communication is conventional.
When described gap frequency-selective surfaces is double-layer frequency selective surfaces structure, double-layer frequency selective surfaces structure bag
Containing 5 layers of medium, intermediate layer is dielectric layer, is respectively provided with substrate layer on the two sides of dielectric layer, sets respectively in the outside of two substrates layer
Put copper clad layers；Wherein:
Copper clad layers is attached to substrate layer surface, prints layer, and two metal layers up and down for frequency-selective surfaces periodic structure
Frequency-selective surfaces periodic structure is identical；
Substrate layer is attached to dielectric layer surface, for conventional lamellae substrate media material layer, has the feature being prone to general character；
Dielectric layer is the antenna house that mobile communication is conventional.
Beneficial effect: using the present invention, can realize the antenna house with spa-tial filter properties, in its passband, wave transparent performance is good
Good, loss of signal is less, and has obvious inhibition in stopband, and capacity of resisting disturbance is strong.
Table 1 assembled unit performance
| Index | Monolayer FSS | Double-deck FSS |
| Band connection frequency (～0.5dB, GHz) | 2.46～2.78 | 1.72～2.71 |
| Relative bandwidth | 12.2% | 44.7% |
| 2.555GHz insertion loss (dB) | ～0.34 | ～0.18 |
| 12GHz insertion loss (dB) | ～0.30 | ～0.31 |
| Stop-band frequency (～10dB, GHz) | ～～1.27 | ～～1.02 |
| 0.96GHz insertion loss (dB) | ～13.31 | ～11.10 |
| 0.89GHz insertion loss (dB) | ～14.12 | ～12.39 |
Accompanying drawing explanation
Fig. 1 is frequency-selective surfaces hierarchy schematic diagram of the present invention, and wherein (a) is single layer structure；B () is double-deck knot
Structure.
Fig. 2 is frequency-selective surfaces period profile structural representation of the present invention.
Fig. 3 is that frequency-selective surfaces four lower limb of the present invention loads slot element and cross gap combinative structure schematic diagram.
Fig. 4 is frequency-selective surfaces Electromgnetically-transparent coefficient figure of the present invention.Wherein (a) is single layer structure transmission coefficient；(b)
For double-decker transmission coefficient.
Figure has: dielectric layer 1, substrate layer 2, copper clad layers 3, cross gap 4, four lower limb load annulus 5.
Detailed description of the invention
Monolayer frequency-selective surfaces structure of the present invention, including: substrate layer, periodically metal flat structure (cover copper
Layer) and medium.Wherein, periodic planar metal structure is attached on substrate, and medium is positioned at below substrate layer.Described substrate
Thickness is about 0.1mm, and dielectric constant is between 4～5.Dielectric thickness is about 2～3mm, and dielectric constant is between 3～6.
Double-layer frequency selective surfaces structure of the present invention, including: substrate layer, periodically metal flat structure (cover copper
Layer) and medium.Wherein, two-layer periodic planar metal structure is attached on respective substrate, and is affixed on medium both sides respectively.
Described substrate thickness is about 0.1mm, and dielectric constant is between 4～5.Dielectric thickness is about four points that passband central frequency is corresponding
One of guide wavelength, dielectric constant is about 1.1.
Metal periodic structure unit of the present invention is square (square) shape, and the length of side is about 24mm, comprises four lower limbs and loads seam
Gap and cross gap combinative structure, wherein: the girth that peripheral four lower limbs load slit centers line is about corresponding to band connection frequency low frequency
Wavelength；The length of internal spider slit centers line is about the wavelength corresponding to passband high frequency treatment.
In order to make frequency-selective surfaces structure be prone to processing, generally periodicity metal unit is printed in the thinnest matchmaker
On matter base material.For monolayer frequency-selective surfaces, supporter is radome material, it is not necessary to separately add support medium.Right
In double-layer frequency selective surfaces, supporter is the medium of low-k, and thickness is about 1/4th guide wavelengths.
Unit is along both horizontally and vertically period expansion, and neat arrangement constitutes a plane pattern, around a unit with
Four unit connect, and its size of the frequency-selective surfaces formed is identical with target antenna cover.
Fig. 2 is frequency-selective surfaces hierarchy of the present invention, is wherein divided into monolayer FSS layering and double-deck FSS layering.Outside
For being printed with the substrate medium of periodically metal unit, inner side is medium, and metal is that periodic structure is identical.For the ease of with
Antenna house used is conformal and reduces the loss of frequency-selective surfaces, and substrate can suitably select relatively thin medium, as used 0.1mm thick
Degree medium is as substrate substrate.
Fig. 2 is frequency-selective surfaces period profile structure of the present invention, i.e. the arrangement mode of frequency selecting structures unit, unit
Square, neat arrangement is become to constitute a plane, have four unit to connect therewith around a unit, its size and target antenna
Cover identical.
Fig. 3 is that frequency-selective surfaces four lower limb of the present invention loads slot element and cross gap combinative structure, and periodic unit becomes
Square, black part is divided into metal patch, and the figure of metal patch includes: in the middle of outermost metal filled part, gap
Fill part.In figure, 5 is that four lower limbs load annulus, and the girth of its centrage is about the wavelength corresponding to passband low frequency, in figure 4
For cross gap, its girth is about the wavelength corresponding to passband high frequency, and in figure, 3 is metal patch part.
Fig. 3 is frequency-selective surfaces Electromgnetically-transparent coefficient figure of the present invention, and during electromagnetic wave incident, frequency as herein described is selected
Select the transmission coefficient of surface texture, shown in corresponding tables of data 1.For monolayer FSS, in 2.46～2.78GHz frequency band ranges,
The insertion loss of frequency-selective surfaces is less than 0.5dB, relative frequency band a width of 12.2%, is less than inserting at 1.27GHz in frequency
Enter loss and be all higher than 10dB.It can be said that bright this monolayer FSS has well suppression for frequency 1.27GHz signal below
Characteristic, and the least for the loss of signal in 2.46～2.78GHz frequency bands.For double-deck FSS, at 1.72～2.71GHz frequency bands
In the range of, the insertion loss of frequency-selective surfaces is less than 0.5dB, and relative frequency band a width of 44.7%, in frequency less than 1.02GHz
The insertion loss at place is all higher than 10dB.It can be said that bright this bilayer FSS has well for frequency 1.02GHz signal below
Inhibition, and the least for the loss of signal in 1.72～2.71GHz frequency bands.
It is more than technical em-bodiments and the technical characterstic of the present invention, is merely to illustrate technical scheme rather than limit
System.But those skilled in the art are still potentially based on teachings of the present invention and disclosure and make technical scheme
Amendment and equivalent.Therefore, protection scope of the present invention should be not limited to the content disclosed in embodiment, and should include various
Without departing substantially from replacement and the correction of the present invention, and contained by the claims book.
Claims (3)
1. a compound cross gap frequency-selective surfaces, it is characterised in that this gap frequency-selective surfaces by along level and
The periodic unit that vertical direction periodically extends is constituted, and described periodic unit is rectangle, and the structure of each of which unit is by four
Lower limb loads slot element, cross gap combination is constituted, mutually isolated between the gap of different units.
One the most according to claim 1 is combined cross gap frequency-selective surfaces, it is characterised in that described gap
When frequency-selective surfaces is monolayer frequency-selective surfaces, monolayer frequency-selective surfaces structure comprises 3 layers of medium, the most successively
It is: copper clad layers, substrate layer, dielectric layer；Wherein:
Copper clad layers is attached to substrate layer surface, prints layer for frequency-selective surfaces periodic structure；
Substrate layer is attached to dielectric layer surface, for conventional lamellae layer of dielectric material, has the feature being prone to conformal；
Dielectric layer is the radome material that mobile communication is conventional.
One the most according to claim 1 is combined cross gap frequency-selective surfaces, it is characterised in that described gap
When frequency-selective surfaces is double-layer frequency selective surfaces structure, double-layer frequency selective surfaces structure comprises 5 layers of medium, and intermediate layer is
Dielectric layer, is respectively provided with substrate layer on the two sides of dielectric layer, is respectively provided with copper clad layers in the outside of two substrates layer；Wherein:
Copper clad layers is attached to substrate layer surface, prints layer, and two metal layers frequency up and down for frequency-selective surfaces periodic structure
Select surface period structure identical；
Substrate layer is attached to dielectric layer surface, for conventional lamellae substrate media material layer, has the feature being prone to conformal；
Dielectric layer is the antenna house that mobile communication is conventional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610803551.0A CN106329040B (en) | 2016-09-05 | 2016-09-05 | Composite cross-shaped gap frequency selection surface |
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| CN201610803551.0A CN106329040B (en) | 2016-09-05 | 2016-09-05 | Composite cross-shaped gap frequency selection surface |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732379A (en) * | 2017-10-18 | 2018-02-23 | 西安天和防务技术股份有限公司 | Spatial filter |
| CN107732378A (en) * | 2017-10-18 | 2018-02-23 | 西安天和防务技术股份有限公司 | Frequency multiplication spatial filter |
| CN107994337A (en) * | 2017-10-18 | 2018-05-04 | 西安天和防务技术股份有限公司 | Filter antenna cover |
| CN108615974A (en) * | 2018-05-03 | 2018-10-02 | 航天特种材料及工艺技术研究所 | Dissipative type broadband frequency-selective surfaces radome |
| CN110034406A (en) * | 2019-05-14 | 2019-07-19 | 山西大学 | A kind of low section multi-beam slot antenna based on the double-deck super surface |
| CN110053315A (en) * | 2019-04-17 | 2019-07-26 | 江南机电设计研究所 | A kind of flexibility frequency-selective surfaces and preparation method |
| CN110943301A (en) * | 2019-12-12 | 2020-03-31 | 中国科学院长春光学精密机械与物理研究所 | Cross-scale double-band-pass frequency selection surface, and periodic unit and design method thereof |
| CN112510375A (en) * | 2020-11-20 | 2021-03-16 | 航天特种材料及工艺技术研究所 | Frequency selection surface with reconfigurable pass band and basic unit |
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| CN101834327A (en) * | 2010-05-04 | 2010-09-15 | 北京航空航天大学 | Novel mixing type frequency selecting surface for stabilizing incident angle |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107732379A (en) * | 2017-10-18 | 2018-02-23 | 西安天和防务技术股份有限公司 | Spatial filter |
| CN107732378A (en) * | 2017-10-18 | 2018-02-23 | 西安天和防务技术股份有限公司 | Frequency multiplication spatial filter |
| CN107994337A (en) * | 2017-10-18 | 2018-05-04 | 西安天和防务技术股份有限公司 | Filter antenna cover |
| CN107732378B (en) * | 2017-10-18 | 2020-03-31 | 西安天和防务技术股份有限公司 | Frequency multiplication spatial filter |
| CN107732379B (en) * | 2017-10-18 | 2020-10-02 | 西安天和防务技术股份有限公司 | Spatial filter |
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| CN108615974A (en) * | 2018-05-03 | 2018-10-02 | 航天特种材料及工艺技术研究所 | Dissipative type broadband frequency-selective surfaces radome |
| CN110053315A (en) * | 2019-04-17 | 2019-07-26 | 江南机电设计研究所 | A kind of flexibility frequency-selective surfaces and preparation method |
| CN110034406A (en) * | 2019-05-14 | 2019-07-19 | 山西大学 | A kind of low section multi-beam slot antenna based on the double-deck super surface |
| CN110943301A (en) * | 2019-12-12 | 2020-03-31 | 中国科学院长春光学精密机械与物理研究所 | Cross-scale double-band-pass frequency selection surface, and periodic unit and design method thereof |
| CN112510375A (en) * | 2020-11-20 | 2021-03-16 | 航天特种材料及工艺技术研究所 | Frequency selection surface with reconfigurable pass band and basic unit |
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| CN106329040B (en) | 2020-08-04 |
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