CN109616724B - Miniaturization frequency-selective surfaces based on dual openings resonant ring - Google Patents
Miniaturization frequency-selective surfaces based on dual openings resonant ring Download PDFInfo
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- CN109616724B CN109616724B CN201811511503.XA CN201811511503A CN109616724B CN 109616724 B CN109616724 B CN 109616724B CN 201811511503 A CN201811511503 A CN 201811511503A CN 109616724 B CN109616724 B CN 109616724B
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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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Abstract
The invention discloses the miniaturization frequency-selective surfaces based on dual openings resonant ring, cooperatively form band logical effect by dual openings resonant ring and intermediate coupling aperture.When electromagnetic wave irradiation to frequency-selective surfaces, resonance is caused by split ring resonator.Using the selecting frequency characteristic of split ring resonator, good space filtering function is not only realized, while having both miniaturization feature, substantially reduces cellar area compared to general frequency-selective surfaces, entire circuit unit size only has 0.3 λ0×0.3λ0.Simultaneously using the aperture slots of resonant ring and intercoupling for layer coupling window, good Out-of-band rejection effect is realized, is respectively having a transmission zero with outer two sides, is greatly improving the squareness factor of circuit.Using symmetric circuit structure, be not only simple in structure, it is easy to process, while make entire circuit about incidence angle θ andThere is good stability, increases its real value.
Description
Technical field
The present invention relates to microwave technical fields, and in particular to the miniaturization frequency-selective surfaces based on dual openings resonant ring.
Background technique
Ka wave band is a part of the microwave band of electromagnetic spectrum, frequency range 26.5-40GHz.Since the wave band has
Have that available bandwidth is wide, the small feature of equipment volume.Therefore, Ka band satellite communication system can be high speed satellite communication, gigabit ratio
Superfine broadband digital transmission, etc. the completely new means of offers.
The innovation of military technology usually leads the direction of scientific research, In as the important force for pushing development in science and technology
In modern war, military target (such as opportunity of combat, naval vessels etc.) have to the Stealth Fighter of electromagnetic wave have become one it is important
Development trend；The rise of space science (such as communication technology of satellite, the outer space are explored), promotes the intersection between multiple subjects
With merge, how to reduce the volume of Primary Component has important engineering real to increase the payload of system, reduce cost
Trample meaning；With the fast development of civilian wireless communication system, frequency spectrum resource growing tension, electromagnetic environment is worsening, signal
Interference is got worse, and how to be solved the emc issue between each system and in system between each equipment, is had become
One acid test.Frequency-selective surfaces are due to having potential military use at the stealthy aspect of target, early in 20th century 60
Age has just obtained extensive concern and research.On the other hand, being constantly progressive with the area research is also above-mentioned space
Electromagnetic compatibility problem provides a good solution in antenna system miniaturization issues and civilian wireless communication system in science
Certainly scheme.
Frequency-selective surfaces are the infinity planes being made of identical patch or aperture unit by two-dimensional and periodic arrangement
Structure, it has frequency selective characteristic to the electromagnetic wave with different operating frequency, polarized state and incident angle.By it to electricity
The difference of the frequency response of magnetic wave, frequency-selective surfaces are broadly divided into two classes: one is metal patch type, another kind is and patch
The aperture type of piece type complementary structure, i.e., the structure of fluting (gap) on metal plate.When frequency-selective surfaces are in resonance shape
When state, total reflection (unit is patch-type) or total transmissivity (unit is slot type) occur for incident electromagnetic wave.Due to this unique
Spa-tial filter properties become microwave and antenna research so that frequency-selective surfaces have very big application value in engineering field
One important directions in field.
The sixties in last century, the development of Computational electromagnetics and the maturation of printed-board technology bring frequency choosing
Select the research boom on surface.It is even more frequency-selective surfaces due to the appearance of the various commercial packages based on Computational electromagnetics
Analysis provide convenience with design.In recent years, it is based on new technology, the continuous development of new theory, various novel frequencies select table
Face also mutually then goes out.Its element circuit form can substantially be classified as four classes according to the difference of structure, be illustrated in fig. 1 shown below: 1, center
The pole the N subelement of connection, such as dipole, Jerusalem cross, square scroll unit etc.；2, annular element, such as Q-RING, annulus
Deng；3, plate-shaped unit, such as rectangular patch, hexagon patch etc.；4, assembled unit, this kind of unit form is by above-mentioned basic unit shape
Formula combination is developed and is formed.In general, consider that annular element is with the obvious advantage from frequency stability and miniaturization angle, but from setting
Meter processing difficulty angle considers the pole the N subelement of center connection then advantageously.So existing structure is difficult to take into account frequency choosing
Select surface resonance frequency, bandwidth, about numerous indexs such as incidence angle stability.And in the design and application of frequency-selective surfaces
In, miniaturization is usually a very important characteristic, because the miniaturization of frequency-selective surfaces unit can be such that frequency selects
The resonance frequency on surface improves frequency-selective surfaces frequency response to incident angle far from free space graing lobe or media table surface wave
Stability, can be with the quantity of adding unit so as to improve its transmission characteristic, in curved surface application in limited large-sized application
In can also reduce because cell configuration distortion due to the deterioration of bring transmission characteristic.
In existing frequency-selective surfaces design, the most common are the N connected using Jerusalem cross as the center of representative
Pole subelement and annular element.Although the pole the N subelement structure wherein connected with center is simple, mostly it is composed of dipole.
But due to structure inherently the shortcomings that, element circuit area is larger, typically about 0.5 λ0×0.5λ0, and there are circuits
It is whole about incidence angle θ andStability it is poor the problems such as.Although annular element makes moderate progress in element circuit size, it is tied
Structure is complex, and is difficult to take into account passband and Stopband Performance, and very big limits practical application.
Summary of the invention
Based on technical problem of the existing technology, the invention proposes the miniaturization frequency choosings based on dual openings resonant ring
Surface is selected, the present invention utilizes the Rogers5880 substrate of 0.127mm thickness, dual openings ring resonator basic principle is based on, using complete
Novel circuit structure not only realizes good frequency selectivity in Ka wave band, and extremely low band internal loss also achieves very high humorous
The stability of vibration frequency and bandwidth about incidence angle, while having both and minimizing this considerable advantage.
The present invention is achieved through the following technical solutions:
Miniaturization frequency-selective surfaces based on dual openings resonant ring, from top to bottom successively include upper layer metallic circuit, on
Layer dielectric substrate, interlayer metal, layer dielectric substrate and lower metal circuit；The upper layer metallic circuit and lower metal circuit
Circuit structure, size it is identical and with the interlayer metal be symmetrical arranged；The upper layer metallic circuit and lower metal electricity
The outer ring center on road, which is provided with to be open, couples gap, right one by one provided with gap is coupled with the opening on the interlayer metal
The upper and lower level coupling window answered.
The present invention selects surface using dual openings resonance ring structure design frequency, using the selecting frequency characteristic of split ring resonator,
Good space filtering function is not only realized, while having both miniaturization feature, is greatly reduced compared to general frequency-selective surfaces
Cellar area, entire circuit unit size only have 0.3 λ0×0.3λ0。
Preferably, by the upper layer metallic circuit, top dielectric substrate, interlayer metal, layer dielectric substrate and lower layer's gold
Belong to circuit package at overall structure be symmetrical structure, centered on z-axis rotate 90 ° coincidence.The present invention uses symmetric circuit knot
Structure is not only simple in structure, easy to process, at the same make entire circuit about incidence angle θ andThere is good stability, increases in fact
Border value.
Preferably, it is identical that 4 sizes are provided on the outer ring of the upper layer metallic circuit and lower metal circuit
Opening coupling gap；Then the identical upper and lower level coupling of 4 sizes is arranged in corresponding opening coupling gap on the interlayer metal
Window.
Preferably, the opening coupling gap width is 0.1mm.
Preferably, the interlayer metal obtains the identical upper and lower level coupling window of 4 sizes by metal erosion, described
Coupling window is having a size of 0.53mm*0.34mm.
Preferably, by the upper layer metallic circuit, top dielectric substrate, interlayer metal, layer dielectric substrate and lower layer's gold
Belong to circuit package at overall structure top view be one square, side length 2.7mm.
Preferably, the top dielectric substrate and layer dielectric substrate are Rogers5880, and relative dielectric constant is
2.2, with a thickness of 0.127mm.
Preferably, the upper layer metallic circuit and lower metal circuit thickness are 0.017mm, the interlayer metal with a thickness of
0.034mm。
Preferably, the upper layer metallic circuit is identical with the split ring resonator size that lower metal circuit uses, humorous
Shake the long 2.1mm of ring, wide 1mm, line width 0.1mm.
The present invention has the advantage that and the utility model has the advantages that
(1) present invention selects surface using dual openings resonance ring structure design frequency, special using the frequency-selecting of split ring resonator
Property, good space filtering function is not only realized, while having both miniaturization feature, subtracted significantly compared to general frequency-selective surfaces
Small cellar area, entire circuit unit size only have 0.3 λ0×0.3λ0。
(2) present invention utilizes the aperture slots of resonant ring and intercoupling for layer coupling window, not only realizes fabulous
Pass-band performance, with interior optimal insertion loss down to 0.8dB, and fabulous Out-of-band rejection effect is realized, with outer two sides
Respectively there is a transmission zero, greatly improves the squareness factor of circuit.
(3) present invention uses symmetric circuit structure, is not only simple in structure, easy to process, while making entire circuit about entering
Firing angle θ andThere is good stability, increases its real value.
(4) present invention uses bilayer PCB thick-film technique, not only low processing cost, but also is easy to the later period of practical stage
Assembly.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is existing frequency-selective surfaces basic structure.
In Fig. 1, the pole the N subelement of the center (a) connection；(b) annular element；(c) plate-shaped unit；(d) assembled unit.
Fig. 2 is frequency-selective surfaces overall structure diagram of the invention.
Fig. 3 is frequency-selective surfaces side view of the invention.
Fig. 4 is split ring resonator and its equivalent circuit of the invention.
In Fig. 4, (a) is split ring resonator of the invention, (b) is the equivalent circuit of split ring resonator.
Fig. 5 is frequency-selective surfaces entirety equivalent circuit of the invention.
Fig. 6 is frequency-selective surfaces simulation result diagram of the invention.
Fig. 7 is the analogous diagram of frequency-selective surfaces of the invention about incidence angle θ stability.
Fig. 8 is frequency-selective surfaces of the invention about incidence angleThe analogous diagram of stability.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment
The present embodiment proposes the miniaturization frequency-selective surfaces based on dual openings resonant ring, overall structure figure and side view
Figure is as Figure 2-3.Overall structure is from top to bottom successively are as follows: opening coupling gap 1, upper layer metallic circuit 2, top dielectric substrate
3, interlayer metal 4, upper and lower level coupling window 5, layer dielectric substrate 6, lower metal circuit 7.Integrated circuit unit is overlooked as one just
It is rectangular, side length 2.7mm.Wherein top dielectric substrate 3 and layer dielectric substrate 6 are Rogers5880, and relative dielectric constant is
2.2, thickness 0.127mm；The thickness of upper layer metallic circuit 2 and lower metal circuit 7 is 0.017mm, interlayer metal with a thickness of
0.034mm.And upper layer metallic circuit 2 and lower metal circuit 7 use identical circuit structure and split ring resonator physics
Size is identical, resonant ring long 2.1mm, wide 1mm, line width 0.1mm, and opening coupling gap 1 is located at the upper layer metallic circuit 2
It is hit exactly with the outer ring of lower metal circuit 7, gap width 0.1mm.Wherein, interlayer metal 4 obtains 4 physics by metal erosion
The coupling window 5 of the complete phase of size is located at right above opening coupling gap 1, and coupling window 5 is having a size of 0.53mm*0.34mm.Wherein,
The setting at 5 midpoint of upper and lower level coupling window is very big on the influence of entire circuit performance, couples the midpoint in gap along z-axis axis in opening
Electric field is strongest, so setting can not only guarantee the transmission of energy of electromagnetic field to the greatest extent in this way.And due to being electrically coupled
Window can generate two transmission poles near pass-band, obtain better band-pass behavior and Out-of-band rejection performance.Finally, by upper
State opening coupling gap 1, upper layer metallic circuit 2, top dielectric substrate 3, interlayer metal 4, upper and lower level coupling window 5, layer dielectric
Substrate 6, lower metal circuit 7 encapsulate integral circuit using symmetrical structure, along z-axis (i.e. perpendicular to integrated circuit structure table
The axis in face) it is rotated by 90 ° coincidence.Full symmetric structure not only contributes to the propagation of electromagnetic field in space, moreover it is possible to when reducing assembly
Necessary mistake is generated because of size difference, while entire circuit resonant frequencies and bandwidth can be enhanced about incidence angleIt is steady
It is qualitative.In practical application, designed cellular construction, which is fabricated to different arrays according to actual requirement, can be obtained satisfaction in fact
The frequency-selective surfaces of border purposes.
Equivalent circuit such as Fig. 4, Fig. 5 institute of the miniaturization frequency-selective surfaces based on split ring resonator of the present embodiment design
Show.Fig. 4 shows frequency-selective surfaces split ring resonator and its equivalent circuit, wherein C1,C2,L1,L2For the capacitor of circuit equivalent
Inductance.Concatenated capacitor and inductor forms band logical effect in specific frequency generating resonant.Fig. 5 shows that frequency-selective surfaces are whole
Body equivalent circuit, wherein the free space of frequency-selective surfaces two sides is Z by characteristic impedance0The transmission line of=377 Ω is equivalent.Two
A identical medium substrate is equivalent by two short transmission lines, length ls=hs, wave impedanceWherein hsAnd εrIt is
The thickness and relative dielectric constant of substrate.Two series connection L'C' branch circuits represent the equivalent circuit of Fig. 4 split shed resonant ring,
Middle L' is L1,L2Equivalent inductance, C' C1And C2Equivalent capacity.L in parallela CaBranch circuit represents the coupling aperture among circuit.
Cm,LmThen indicate the electromagnetic coupling between two split ring resonators up and down.Split ring resonator with couple the electromagnetic coupling between aperture
Very little is ignored.
Entire circuit cooperatively forms band logical effect by split ring resonator and intermediate coupling aperture.When electromagnetic wave shines
When being incident upon frequency-selective surfaces, resonance is caused by split ring resonator.Since split ring resonator is in resonance frequency electric field most strength
Opening, so intermediate coupling aperture is to be electrically coupled aperture.Being electrically coupled aperture can not only obtain pass-band performance well, and
Out-of-band rejection performance can be improved well with two transmission poles of outer formation.Whole design is exactly big by adjusting opening
Small, the parameters such as coupling pore size adjust each interstage coupling, circuit are made to be optimal performance.
The present invention obtains simulation result by 3 D electromagnetic simulation software HFSS, and it is special that frequency-selecting of the invention is illustrated in Fig. 6
Property, it can be seen that the 3dB passband of frequency-selective surfaces is 32.7GHz~33.35GHz, bandwidth 650MHz, is damaged with interior best insertion
Consumption is less than 1dB, and two transmission zeros are generated at 30.3GHz and 36.93GHz, keeps passband lower sideband precipitous, effectively improves
Circuit squareness factor.Fig. 7 and Fig. 8 illustrate the present invention about incidence angle θ withAngle stability.WhenWhen, in band
In the case that insertion loss is better than 3dB, θ can achieve 50 ° or so.When θ=0 °, incidence angleAlmost to overall circuit performance
Do not influence.To illustrate the present invention about incidence angle θ withAngle stability it is fine.
The present invention is based on the double-deck PCB technologies, select surface using dual openings resonance ring design frequency road.Utilize split ring resonator
Selecting frequency characteristic, not only realize good space filtering function, while having both miniaturization feature, compared to general frequency select table
Face substantially reduces cellar area, and entire circuit unit size only has 0.3 λ0×0.3λ0.The aperture slots of resonant ring are utilized simultaneously
With intercoupling for layer coupling window, good pass-band performance is not only realized, with interior optimal insertion loss down to 0.8dB, and
And good Out-of-band rejection effect is realized, respectively there is a transmission zero with outer two sides, is greatly improving the rectangle system of circuit
Number.Using symmetric circuit structure, be not only simple in structure, it is easy to process, while make entire circuit about incidence angle θ andHave very well
Stability, increase its real value.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (9)
1. the miniaturization frequency-selective surfaces based on dual openings resonant ring, which is characterized in that from top to bottom successively include upper layer gold
Belong to circuit (2), top dielectric substrate (3), interlayer metal (4), layer dielectric substrate (6) and lower metal circuit (7)；On described
Layer metallic circuit (2) and the circuit structure of lower metal circuit (7), size it is identical and with the interlayer metal (4) symmetrically
Setting；The upper layer metallic circuit (2) and lower metal circuit (7) are intersected vertically by two rectangular aperture rings, in formation
Between the structure that surrounds of close ring and four outer rings, the outer ring center of the upper layer metallic circuit (2) and lower metal circuit (7) is equal
It is provided with opening coupling gap (1), is provided on the interlayer metal (4) and couples gap (1) correspondingly with the opening
Upper and lower level coupling window (5).
2. the miniaturization frequency-selective surfaces according to claim 1 based on dual openings resonant ring, which is characterized in that by institute
State upper layer metallic circuit (2), top dielectric substrate (3), interlayer metal (4), layer dielectric substrate (6) and lower metal circuit
(7) overall structure being packaged into is symmetrical structure, and 90 ° of coincidences are rotated centered on z-axis.
3. the miniaturization frequency-selective surfaces according to claim 2 based on dual openings resonant ring, which is characterized in that described
4 sizes identical opening coupling gap is provided on the outer ring of upper layer metallic circuit (2) and lower metal circuit (7)
(1)；Then the identical upper and lower level coupling window of 4 sizes is arranged in corresponding opening coupling gap (1) on the interlayer metal (4).
4. the miniaturization frequency-selective surfaces according to claim 1-3 based on dual openings resonant ring, feature
It is, the opening coupling gap width is 0.1mm.
5. the miniaturization frequency-selective surfaces according to claim 1-3 based on dual openings resonant ring, feature
It is, the interlayer metal (4) obtains the identical upper and lower level coupling window (5) of 4 sizes, the coupling by metal erosion
Window (5) is having a size of 0.53mm*0.34mm.
6. the miniaturization frequency-selective surfaces according to claim 1-3 based on dual openings resonant ring, feature
It is, by the upper layer metallic circuit (2), top dielectric substrate (3), interlayer metal (4), layer dielectric substrate (6) and lower layer
The overall structure top view that metallic circuit (7) is packaged into is a square, side length 2.7mm.
7. the miniaturization frequency-selective surfaces according to claim 1-3 based on dual openings resonant ring, feature
It is, the top dielectric substrate (3) and layer dielectric substrate (6) are Rogers5880, and relative dielectric constant 2.2 is thick
Degree is 0.127mm.
8. the miniaturization frequency-selective surfaces according to claim 1-3 based on dual openings resonant ring, feature
Be, the upper layer metallic circuit (2) and lower metal circuit (7) with a thickness of 0.017mm, the interlayer metal (4) with a thickness of
0.034mm。
9. the miniaturization frequency-selective surfaces according to claim 1-3 based on dual openings resonant ring, feature
It is, the upper layer metallic circuit (2) is identical with the split ring resonator size that lower metal circuit (7) uses, resonant ring
Long 2.1mm, wide 1mm, line width 0.1mm.
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| CN110854543B (en) * | 2019-11-15 | 2021-03-30 | 电子科技大学 | Dual-frequency broadband wide-angle circularly polarized grid based on miniaturized unit |
| CN111289169B (en) * | 2020-02-13 | 2021-05-07 | 大连理工大学 | Passive wireless temperature and pressure integrated sensor based on LC resonance and preparation method thereof |
| CN111969325B (en) * | 2020-06-23 | 2021-06-15 | 广州智讯通信系统有限公司 | Frequency selection surface unit based on filter antenna and frequency selection surface |
| CN112467319B (en) * | 2020-12-15 | 2021-12-10 | 郑州中科集成电路与系统应用研究院 | Terahertz filter |
| CN112909567A (en) * | 2021-01-21 | 2021-06-04 | 天津大学 | Terahertz band-pass filter structure unit and continuous modulation method |
| CN114584074B (en) * | 2022-01-14 | 2023-07-18 | 电子科技大学 | Miniaturized frequency-selecting structure and application thereof in low-phase-noise microwave oscillator |
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| JP2008536366A (en) * | 2005-03-15 | 2008-09-04 | エレクトロニクス アンド テレコミュニケーションズ リサーチ インスチチュート | Frequency selective reflector for frequency band filtering and design method thereof |
| US8633866B2 (en) * | 2010-02-26 | 2014-01-21 | The Regents Of The University Of Michigan | Frequency-selective surface (FSS) structures |
| US8750653B1 (en) * | 2010-08-30 | 2014-06-10 | Sandia Corporation | Infrared nanoantenna apparatus and method for the manufacture thereof |
| CN103311657A (en) * | 2012-03-15 | 2013-09-18 | 深圳光启创新技术有限公司 | Antenna device |
| CN103700951B (en) * | 2014-01-10 | 2015-12-02 | 中国科学院长春光学精密机械与物理研究所 | Complex media double-deck FSS structure SRR metal level ultra-thin absorbing material |
| CN107069234B (en) * | 2017-04-18 | 2019-12-10 | 中国电子科技集团公司第三十八研究所 | Ultra-wideband wave-absorbing narrow-band transmission electromagnetic band gap structure and application thereof |
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Denomination of invention: Miniaturized open-loop frequency selection based on resonant surface Effective date of registration: 20220328 Granted publication date: 20191108 Pledgee: Bank of China Limited Chengdu Chenghua sub branch Pledgor: SICHUAN ZHONGWEI CHUANGTONG TECHNOLOGY CO.,LTD. Registration number: Y2022510000079 |