CN104810583A - Polarization and wide-angle-incidence insensitive three-band metamaterial band-pass filter - Google Patents
Polarization and wide-angle-incidence insensitive three-band metamaterial band-pass filter Download PDFInfo
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- CN104810583A CN104810583A CN201510230425.6A CN201510230425A CN104810583A CN 104810583 A CN104810583 A CN 104810583A CN 201510230425 A CN201510230425 A CN 201510230425A CN 104810583 A CN104810583 A CN 104810583A
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Abstract
A polarization and wide-angle-incidence insensitive three-band metamaterial band-pass filter is characterized by comprising a first structuralized metal layer, a medium layer and a second structuralized metal layer. The first structuralized metal layer and the second structuralized metal layer are plated on two sides of the medium layer. Each of the first structuralized metal layer and the second structuralized metal layer is a metal surface formed by periodically-arrayed metal square ring resonance units. Each metal square ring resonance unit includes a plurality of metal square rings sequentially embedded. A plurality groups of metalized via holes penetrating the first structuralized metal layer, the medium layer and the second structuralized metal layer are periodically formed at intervals, and a square substrate integrated waveguide cavity is formed on the periphery of each metal square ring resonance unit. The filter is insensitive in polarization, wide in incidence angle, good in passband selectivity, simple in geometrical structural design, easy to machine and low in cost.
Description
Technical field
The invention belongs to microwave technical field, specifically, is a kind of polarization and insensitive three wave band Meta Materials band pass filters of broad-angle-incident of microwave section.
Background technology
Microwave refers to that frequency is the electromagnetic wave of 0.3-3000GHz, is divided into decimeter wave, centimeter wave and millimeter wave.Microwave section electromagnetic spectrum has the important feature being different from its all band, such as penetrability, unionized and informedness etc., is widely used in the making of microwave device, radar science and technology and Modern Communication System etc.
In recent years, Meta Materials (also known as Novel manual electromagnetic material) obtains researchers and pays close attention to widely, and it possesses some character not available for nature current material, such as negative index, reversed Doppler effect etc.There is when Meta Materials refers to that electromagnetic wave is propagated wherein the artificial composite material of special conduction or radiation characteristic, early stage people study and mainly concentrate in left-handed materials, it be a kind of can engineer, meet the electromagnetic material of specific effective dielectric constant and magnetic permeability requirement.Meta Materials can realize the irrealizable characteristic of conventional material, such as invisible clothes, super lens etc., can also improve the performance of existing equipment, has extremely important application in fields such as electromagnetism stealth, communication system and imaging techniques.
2005, the people such as the Luo Guoqing of Southeast China University adopted substrate integration wave-guide (SIW) the Technology design microwave filtering device of a series of excellent performance.SIW technology not only remains the advantage of conventional metals waveguide, such as high q-factor, high selectivity etc., can also be used to design band pass filter.The introducing of SIW technology greatly improves the performance of conventional filter.
2008, the people such as the Xu Rongrong of Institutes Of Technology Of Nanjing have devised a kind of two waveband band pass filter being operated in microwave section, this filter is by loading capacitance in conventional resonance gap, and changing capacitance achieves the two waveband band pass filter being operated in microwave section then.Can realize two waveband design easily by changing capacitance, but owing to needing welding 4 electric capacity in a construction unit, whole filter just needs to weld a large amount of electric capacity, this brings great inconvenience to model processing.In addition, from emulation and experimental data, two working passbands are comparatively narrow, and filtering performance is not very desirable.
2011, the people such as the Zhou Hang of air force engineering university have devised a kind of three wave band second order broadband band-pass filters being operated in microwave section, this filter adopts paster-hole-paster (PAP) structure, by setting the PAP of different size, achieve in microwave section the three wave band second order broadband band-pass filters that working band is respectively 9.13-9.60GHz, 11.11-11.61GHz and 13.32-13.96GHz.This filter has high selectivity and under broad-angle-incident (0 ~ 30 °), has the characteristic of stationary filtering performance, but due to filter cell employing metal-dielertric-metal-dielertric-metallic multilayer structures, is not easy to sample processing.
2013, the people such as the Wang Desong of Institutes Of Technology Of Nanjing have devised a kind of three band broadband band pass filters being operated in microwave section, this filter adopts typical metal-dielertric-metal sandwich structure, achieves in microwave section the working band that three have transmission zero.This filter has low section and to the characteristic under insensitive, the broad-angle-incident (0 ~ 45 °) of polarization with stationary filtering performance.But from transmission spectral line, filter three working bands are all narrower, and passband edge is precipitous not, the selectivity of passband is not very good.
Summary of the invention
Goal of the invention: the object of this invention is to provide a kind of polarization and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident, this filter has insensitive, the broad-angle-incident of polarization and the good good characteristic of passband selectivity, and geometry simplicity of design, be easy to processing, cost is low.
To achieve these goals, present invention employs following technical scheme: a kind of polarization and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident, it is characterized in that: comprise the first structured metal layer, dielectric layer and the second structured metal layer, described dielectric layer two sides is coated with metal level, is respectively the first structured metal layer and the second structured metal layer; Described first structured metal layer and the second structured metal layer are the metal surface that metal side's ring resonant element periodic arrangement is formed, and described metal side ring resonant element is some metal Fang Huan nested successively; Run through the first structured metal layer, dielectric layer and the second structured metal layer and periodically equidistantly offer many group metallization via holes, make to form a square substrate integral waveguide cavity around metal side's ring resonant element around each metal side ring resonant element.
In the present invention, preferably, first, second described structured metal layer adopts material to be copper.
In the present invention, preferably, described dielectric layer is F4B dielectric-slab.
In the present invention, preferably, the thickness of described metallization via hole hole wall is 0.025mm.
In the present invention, preferably, between described metallization via diameter and adjacent vias, the hole heart is greater than 0.5 apart from ratio.
In the present invention, preferably, shown metallization via diameter is 0.5mm, and between adjacent metal via hole, heart distance in hole is 0.72mm.
Compared with prior art, the present invention has following advantage:
1, polarization of the present invention and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident are compared with three traditional wave band Meta Materials broadband band-pass filters, due to the introducing of substrate integration wave-guide, by the coupling of gap mode of resonance and cavity resonant mode, improve the passband selectivity of filter.In addition, under two kinds of polarization modes, the stability of filter broad-angle-incident performance have also been obtained very large lifting.
2, polarization of the present invention and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident are compared with traditional single, double wave band Meta Materials broadband band-pass filter, three frequency ranges can be operated in simultaneously, and stable performance, each passband selectivity is high, insertion loss is lower.
3, polarization of the present invention and the insensitive three wave band Meta Materials bandpass filter structures simplicity of design of broad-angle-incident, in dielectric-slab both sides, periodically ring resonant element in the side's of etching can realize.Model optimization process is short and sweet, and length and the width that only need adjust each Fang Huan can reach required filtering performance.
4, polarization of the present invention and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident are operated in microwave section, and easy to process, common manufacturing process can realize.
Accompanying drawing explanation
Fig. 1 is that filter construction unit front view of the present invention and dimensional parameters are arranged;
Fig. 2 is that filter construction cell side view of the present invention and dimensional parameters are arranged;
Fig. 3 is filter construction unit three-dimensional schematic diagram of the present invention;
Fig. 4 is filter partial structurtes schematic diagram of the present invention;
Fig. 5 is the present invention emulates gained under TE, TM polarization mode transmission spectrum and absorption spectra when electromagnetic wave vertical incidence;
Fig. 6 is the transmission spectrum of the present invention's electromagnetic wave wide angle (0 ° ~ 40 °) incident gained under TE polarization mode;
Fig. 7 is the transmission spectrum of the present invention's electromagnetic wave wide angle (0 ° ~ 40 °) incident gained under TM polarization mode.
Embodiment:
Below in conjunction with accompanying drawing the present invention done and further explain.
As shown in Figures 3 and 4, polarization of the present invention and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident comprise the first structured metal layer, dielectric layer and the second structured metal layer, described dielectric layer two sides is coated with metal level, is respectively the first structured metal layer and the second structured metal layer; Described first structured metal layer is identical with the second nanostructured metal Rotating fields, is the metal surface that 25 × 25 metal side's ring resonant element periodic arrangement are formed, and described metal side ring resonant element is 4 nested successively metal Fang Huan; Run through the first structured metal layer, dielectric layer and the second structured metal layer and periodically equidistantly offer many group metallization via holes, make to form a square substrate integral waveguide cavity around metal side's ring resonant element around each metal side ring resonant element.The coupling gap of the metal Fang Huan formation that a corresponding square substrate integral waveguide cavity is nested successively with 4 forms a filter construction unit.
As illustrated in fig. 1 and 2, metal side is p in the ring resonant element cycle, metal side's ring resonant element is respectively metal side's ring 1 from outside to inside, metal side's ring 2, metal side's ring 3 and metal side's ring 4, wherein, the outer length of side of metal side's ring 1 is sl 1, width is sw1, the outer length of side of metal side's ring 2 is sl2, width is sw2, the outer length of side of metal side's ring 3 is sl3, width is sw3, the outer length of side of metal side's ring 4 is sl4, width is sw4, the diameter of metallization via hole is d, between adjacent metal via hole, heart distance in hole is dp, metallization via diameter and the hole heart are greater than 0.5 apart from ratio, the thickness of metal side's ring resonant element of the first structured metal layer and the second structured metal layer is tm, the thickness of dielectric layer is td, the pore wall thickness of metallization via hole is tu.
In the present embodiment, dielectric layer employing thickness is F4B (polytetrafluoroethylglass glass cloth) dielectric-slab of 3mm, and its dielectric constant is ε=2.65, and loss angle tangent is tan δ=0.001.First structured metal layer and the second structured metal layer adopt material to be copper.
Utilize 3 D electromagnetic simulation software CST to carry out design and the optimization of filter construction model of element, finally obtain polarization and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident of performance excellence.Concrete filter construction model of element optimum configurations is as follows: p=10mm, sl1=10mm, sw1=0.35mm, sl2=8.39mm, sw2=0.31mm, sl3=6.12mm, sw3=0.3mm, sl4=5mmm, sw4=0.4mm, d=0.5mm, dp=0.72mm, tm=0.035mm, td=3mm, tu=0.025mm, ε=2.65, tan δ=0.001.
Adopt said structure optimum configurations, the dielectric-slab that the thickness utilizing PCB technology to be all coated with metal copper layer in above and below is 3mm periodically etches corresponding gap, form coupling gap; And then run through whole dielectric-slab and periodically offer and organize via hole more, and inject certain thickness metal copper layer, form square substrate integral waveguide cavity.The whole course of processing is simple, and cost of manufacture is low.
The specific works principle of polarization of the present invention and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident is as follows:
Dielectric layer two sides is coated with the structured metal layer be made up of metal side's ring resonant element periodic arrangement, and structured metal layer effectively can control the transmission characteristic of incident electromagnetic wave.When incident electromagnetic wave is in the resonance band of resonant element, the electromagnetic wave of this frequency range for will by whole transmission, will all be reflected grooving structure for paster structure.After incident electromagnetic wave incides polarization and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident, electromagnetic wave in each band connection frequency is coupled in cavity by periodically positive square-loop slot element, and space is coupled in the pros' annular coupling gap through another surface after being interacted by gap mode of resonance and cavity resonant mode, thus form the band pass filter with three working bands.
Different from traditional gap resonant element, invention introduces metallic cavity resonance, the performance of filter is greatly improved by intercoupling of two kinds of modes of resonance, especially having very large lifting to the stability of broad-angle-incident performance and the selectivity of passband, is also a bright spot of the present invention.
Be illustrated in figure 5 the transmission spectrum of this filter when electromagnetic wave vertical incidence under TE, TM two kinds of polarization modes and reflectance spectrum.Because construction unit has rotational symmetry, the spectral line under two kinds of polarization modes is identical, shows that this filter shows when electromagnetic wave vertical incidence the insensitive characteristic of polarization.
Be respectively the transmission spectrum of this filter (0 ° ~ 40 °) TE, TM two kinds of polarization modes under electromagnetic wave broad-angle-incident as shown in Figure 6 and Figure 7.For TE polarization, along with the increase of incident angle, three working bands all show good stability; For TM polarization, along with the increase of incident angle, same three frequency bands still maintain good stability.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a polarization and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident, it is characterized in that: comprise the first structured metal layer, dielectric layer and the second structured metal layer, described dielectric layer two sides is coated with metal level, is respectively the first structured metal layer and the second structured metal layer; Described first structured metal layer and the second structured metal layer are the metal surface that metal side's ring resonant element periodic arrangement is formed, and described metal side ring resonant element is some metal Fang Huan nested successively; Run through the first structured metal layer, dielectric layer and the second structured metal layer and periodically equidistantly offer many group metallization via holes, make to form a square substrate integral waveguide cavity around metal side's ring resonant element around each metal side ring resonant element.
2. one polarization according to claim 1 and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident, is characterized in that: described first structured metal layer and the second structured metal layer adopt material to be copper.
3. one polarization according to claim 1 and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident, is characterized in that: described dielectric layer is F4B dielectric-slab.
4. one polarization according to claim 1 and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident, is characterized in that: the thickness of described metallization via hole hole wall is 0.025mm.
5. one polarization according to claim 1 and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident, is characterized in that: between described metallization via diameter and adjacent metal via hole, the hole heart is greater than 0.5 apart from ratio.
6. one polarization according to claim 5 and the insensitive three wave band Meta Materials band pass filters of broad-angle-incident, is characterized in that: shown metallization via diameter is 0.5mm, and between adjacent metal via hole, heart distance in hole is 0.72mm.
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Cited By (6)
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|---|---|---|---|---|
| CN105609908A (en) * | 2016-03-07 | 2016-05-25 | 中国矿业大学 | Dual-band band-pass filter insensitive to polarization and wide-angle incidence |
| CN106058394A (en) * | 2016-08-11 | 2016-10-26 | 中国矿业大学 | Terahertz three-wave-band narrow-band band-pass filter based on metamaterial |
| CN107256998A (en) * | 2017-06-23 | 2017-10-17 | 电子科技大学 | Based on half module substrate integrated wave guide Meta Materials line filter |
| CN108598633A (en) * | 2018-05-02 | 2018-09-28 | 深圳市太赫兹科技创新研究院 | Bandstop filter |
| CN110880632A (en) * | 2019-11-26 | 2020-03-13 | 电子科技大学 | Wide-bandwidth angular frequency selection surface based on substrate integrated waveguide cavity |
| TWI822250B (en) * | 2022-08-16 | 2023-11-11 | 啟碁科技股份有限公司 | Transparent electromagnetic wave focusing device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105609908A (en) * | 2016-03-07 | 2016-05-25 | 中国矿业大学 | Dual-band band-pass filter insensitive to polarization and wide-angle incidence |
| CN106058394A (en) * | 2016-08-11 | 2016-10-26 | 中国矿业大学 | Terahertz three-wave-band narrow-band band-pass filter based on metamaterial |
| CN106058394B (en) * | 2016-08-11 | 2018-11-16 | 中国矿业大学 | A kind of three wave band narrow band filter of Terahertz based on metamaterial |
| CN107256998A (en) * | 2017-06-23 | 2017-10-17 | 电子科技大学 | Based on half module substrate integrated wave guide Meta Materials line filter |
| CN107256998B (en) * | 2017-06-23 | 2019-05-24 | 电子科技大学 | Based on half module substrate integrated wave guide Meta Materials line filter |
| CN108598633A (en) * | 2018-05-02 | 2018-09-28 | 深圳市太赫兹科技创新研究院 | Bandstop filter |
| WO2019210717A1 (en) * | 2018-05-02 | 2019-11-07 | 深圳市太赫兹科技创新研究院 | Band-stop filter |
| CN110880632A (en) * | 2019-11-26 | 2020-03-13 | 电子科技大学 | Wide-bandwidth angular frequency selection surface based on substrate integrated waveguide cavity |
| TWI822250B (en) * | 2022-08-16 | 2023-11-11 | 啟碁科技股份有限公司 | Transparent electromagnetic wave focusing device |
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