CN100433448C - Super thin one side steep filter property frequency selecting surface - Google Patents
Super thin one side steep filter property frequency selecting surface Download PDFInfo
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- CN100433448C CN100433448C CNB2006100967922A CN200610096792A CN100433448C CN 100433448 C CN100433448 C CN 100433448C CN B2006100967922 A CNB2006100967922 A CN B2006100967922A CN 200610096792 A CN200610096792 A CN 200610096792A CN 100433448 C CN100433448 C CN 100433448C
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Abstract
This invented super thin single-side steep filter property frequency selection surface can be used in multiple frequency antennas of satellite, radar communication system as a frequency band multiplex machine, which is processed on a multi-layer chip with three-layers of metal faces and two dielectric layers formed by laminating two microwave plate layers, in which, the top and bottom metal surfaces are etched with periodic large square loop slots in the same size, another size of periodic small square loop slot coincident with the central position of the large one is etched on the middle metal side, two media layers are filled among the three metal surfaces, a serial metal through holes in even intervals around each of the slot unit on the laminated multi-layer chip to form a chip integrated waveguide cavity equivalent to traditional metal cavities.
Description
Technical field
The present invention a kind ofly can be used as the multifrequency antenna that the frequency range multiplexer is applied to communication systems such as satellite, radar based on the monolateral ultra-thin frequency-selective surfaces that falls filtering characteristic suddenly of having of substrate integrated wave-guide cavity wave cascade, belongs to microwave technical field.
Background technology
Frequency-selective surfaces (FSS) is very extensive in engineering is used.FSS has good selectivity to electromagnetic transmission and reflection, presents the all-pass characteristic for the electromagnetic wave in its passband, and the electromagnetic wave in its stopband then is total reflection characteristic, has the space filtering function.In microwave regime, FSS can be used for the frequency range multiplexer of Telstar, utilizes many feeds to dispose and enlarges traffic capacity.Another main application is to make radome, is used for the shielding of Aero-Space radar antenna and stealthy.Can also make high performance waveguide filter as the integrated insert of monolithic.The main performance of FSS is a frequency selective characteristic, for incident direction and the sensitivity of polarization and the stability of bandwidth of driving source.Traditional FSS selectivity that is formed by periodic patches or gap array is relatively poor.In order to improve the frequency selective characteristic of FSS, in the world at present method in common obtains multi-screen FSS cascade the better choice characteristic exactly, but mostly is Chebyshev's response characteristic, and selectivity characteristic is not high enough.Be filled with the dielectric layer that uses as impedance transformer between the multilayer FSS of cascade simultaneously, thickness of dielectric layers is about 1/4th of working frequency range centre frequency corresponding wavelength, this makes that whole FSS structural thickness is very big, and these have all limited its use under a lot of practical application.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of formation and have the frequency-selective surfaces that filtering characteristic falls in super thin one side suddenly based on the substrate integrated wave-guide cavity wave cascade, this frequency-selective surfaces is good in the working frequency range stability, and thickness reduces greatly, is easy to processing, simple in structure, cost is low.It is good that this frequency-selective surfaces and the frequency-selective surfaces of existing multilayer cascade are compared stability, and volume reduces greatly.
Technical scheme: super thin one side steep filter property frequency selecting surface of the present invention forms with the manufacturing of two-layer microwave sheet material lamination, and substrate comprises the metal covering and the metallic intermediate layer face of upper and lower surface, is filled with two layer medium layer up and down between this three-layer metal face; Simultaneously on the metal covering of upper and lower surface, open measure-alike big square ring type clearance channel, on the intermetallic metal face, carve the little square ring type clearance channel of another size that the center overlaps with upper and lower surface square ring type clearance channel; Last square ring type clearance channel unit is to be interval with a series of metal through holes uniformly periodically greatly around each on the good substrate of lamination, and formation is equivalent to the substrate integrated wave-guide cavity wave of conventional metals cavity.
This selection surface be used for plane wave is coupled to cavity and at the etched big square ring type clearance channel in metal surface up and down about length and width both direction symmetry " " shape slit fully; With being used for that electromagnetic wave with a cavity is coupled to another cavity at the little square ring type clearance channel of metallic intermediate layer facet etch about length and width both direction symmetry " " shape slit fully.
This selection surface when Ka frequency range centre frequency is 30GHz up and down the big square ring type clearance channel length of side of metal surface be 2.52 millimeters, width is 0.21 millimeter, the little square ring type clearance channel length of side of metallic intermediate layer face is 1.35 millimeters, width is 0.13 millimeter; The working medium substrate is that dielectric constant is 2.2 Rogers5880 material, and its thickness is 0.254 millimeter.
The diameter of plated-through hole is 0.4 millimeter, and the hole heart of two adjacent metal through holes is apart from being 0.6 millimeter between the plated-through hole array, and the ratio of plated-through hole diameter and hole heart distance is greater than 0.5.
This frequency-selective surfaces combines the transmission characteristic and the field distribution of traditional periodic structure and common housing structure.The cavity the inside is coupled to the plane wave in the certain frequency scope in the periodicity slit on surface during work, energy with double mode resonance in the cavity is coupled to next cavity by the coupling slit of centre with electromagnetic wave again, the repeatedly filter action of this cavity is coupled away the ripple of the narrower frequency range slit by opposite side, thereby finishes the high selectivity transmission to the space plane ripple.
Operation principle is: after plane wave incides frequency-selective surfaces, the cavity the inside is coupled to the plane wave of working frequency range in periodic square ring type slit, pass through the coupling of two different modes in the cavity and the coupling between cavity again, electromagnetic wave is coupled to the space by slit on the opposite side surface.The space plane ripple has finally realized having the monolateral filtering characteristic filter effect that falls suddenly through the selectivity transmission of upper and lower surface slit and middle two cavitys.
Beneficial effect: the monolateral ultra-thin novel frequency option table face that falls filtering characteristic suddenly that forms based on substrate integrated waveguide technology has the following advantages:
The selectivity characteristic that this novel frequency of a selects the surface to compare monolateral band with the frequency-selective surfaces of multi-screen cascade in the past greatly improves, and volume reduces greatly, and thickness only be the sixth of the frequency-selective surfaces of traditional multi-screen plane cascade system formation.
This novel frequency of b is selected surperficial stable performance, and is little in the insertion loss of working frequency range, the selectivity height.And its high selectivity and bandwidth stability do not change with the incident angle of incident wave and the variation of polarized state.
This novel frequency of c selects the surface simple in structure, and entire infrastructure is covered with in common upper and lower surface on the dielectric substrate of metal and just can realizes.In design process, only need to regulate the shape and size in square ring type slit, and the periodicity size of metal throuth hole just can obtain needed performance.Structural parameters are few, save the time of design optimization greatly.
It is simple and convenient that this novel frequency of d selects the surface to make, and just can realize with common lamination PCB technology, cheap.
Description of drawings
Fig. 1 is the structure vertical view of the local unit of a signal of the present invention.P is the Cycle Length and the width of one-period unit, and C is the length and the width of the substrate integrated wave-guide cavity wave that plated-through hole constitutes in the one-period unit, L be about the length of side in square ring type slit, metal surface, L
mBe the length of side in coupling square ring type slit on the intermediate metal layer, W be about the width in square ring type slit, metal surface, W
mBe the width in coupling square ring type slit on the intermediate metal layer, d is a through-hole diameter, d
pBe the hole heart distance of adjacent two through holes, h is a thickness of dielectric layers, and mh is a metal layer thickness.
Fig. 2 is the structure side view of the local unit of a signal of the present invention.
Fig. 3 is the perspective view of the local unit of a signal of the present invention.Have among the figure: the metal surface 1 up and down, metallic intermediate layer face 2, big square ring type clearance channel 3, little square ring type clearance channel 4, middle dielectric layer 5, plated-through hole 6.
Fig. 4 is the overall structure schematic diagram that the present invention is applied to the Ka wave band.
Fig. 5 is the present invention and comparison based on the frequency-selective surfaces of substrate integrated waveguide single cavity result when the plane wave vertical incidence.
Fig. 6 is the comparison that Chebyshev's response frequency of the present invention and common multi-screen cascade is selected surface result when the plane wave vertical incidence.
Embodiment
The high quality factor resonance of introducing cavity earlier based on the monolateral ultra-thin novel frequency option table kept man of a noblewoman who falls filtering characteristic suddenly of substrate integrated waveguide technology improves the frequency selective characteristic of FSS, strengthen its incident angle and the insensitivity of polarization and bandwidth stability under the various environment for driving source, next utilizes traditional cascade cavity body filter theory to design multi layer substrate integral waveguide cavity cascade FSS.Structurally, super thin one side steep filter property frequency selecting surface uses two-layer microwave sheet material to be pressed into the multilayer board process layer.Its upper and lower surface and intermediate layer are metal covering, are made of medium charge in the middle of the three-layer metal.Up and down be carved with the positive square ring type slot element of the identical periodicity of position, size and Cycle Length on the metal surface, be carved with different on the metallic intermediate layer face but center coincidence and the identical positive square ring type slot element of periodicity of Cycle Length with metal surface gap size up and down.On the multi layer substrate that three-layer metal face and two layer medium lamination are made, around each positive square ring type slot element with uniform interval around be provided with a series of metal through holes, formation is equivalent to the substrate integrated wave-guide cavity wave of the cascade up and down of conventional metals cavity.In etched square ring type slit, metal surface up and down be about symmetrical fully " " shape slit of length and width both direction.The upper and lower surface square ring type slit length of side is 2.52 millimeters when Ka frequency range centre frequency is 30GHz, and width is 0.21 millimeter, and square ring type slit, the intermediate layer length of side is 1.35 millimeters, and width is 0.13 millimeter.Sheet material is that dielectric constant is 2.2 Rogers5880 material, and its thickness of dielectric layers is 0.254 millimeter, and metal layer thickness is 0.018 millimeter.The diameter of plated-through hole is 0.4 millimeter, and the hole heart of two adjacent metal through holes is apart from being 0.6 millimeter between the plated-through hole array, and the ratio of plated-through hole diameter and hole heart distance is greater than 0.5.
Manufacture process of the present invention is: at first choosing two dielectric substrates, a substrate opens the square ring type clearance channel that size is distinguished corresponding outer surface and intermediate layer on two metal coverings up and down therein, the metal covering of a side is opened the square ring type clearance channel of size corresponding to outer surface on another substrate, and the metal covering of opposite side is all erased.Then first substrate is opened the one side of corresponding intermediate layer size square ring type clearance channel and second substrate do not have metal level that this simultaneously stacks and carries out lamination.Last each periodicity square ring type slot element that centers on the good substrate of lamination is beaten the substrate integrated wave-guide cavity wave that a series of metal through holes formation are equivalent to the conventional metals cavity with uniform interval.Select suitable aperture and pitch of holes, avoid produce power leakage between cavity.This frequency-selective surfaces combines the transmission characteristic and the field distribution of traditional periodic structure and common housing structure.Because single substrate thickness is much smaller than the broadside of the cavity of substrate integration wave-guide formation, so it is very little for the resonance affects of cavity, so select ultrathin substrate can reduce the thickness of whole frequency-selective surfaces greatly.Select the size in suitable coupling square ring type slit, intermediate layer, can regulate two cavity coupling amounts up and down, have the monolateral frequency-selective surfaces that falls filtering characteristic suddenly thereby form.Whole frequency-selective surfaces is realized by common PCB technology fully.Cavity body structure is realized by the plated-through hole array, makes simple, with low cost.
We have the unilateral transmission ultra-thin frequency-selective surfaces at zero point based on substrate integrated waveguide technology, the relative dielectric constant ε of dielectric substrate what the Ka wave band had been realized above introduction
rAnd geometrical parameters (seeing Fig. 1,2,3) is as follows:
Claims (3)
1. super thin one side steep filter property frequency selecting surface, it is characterized in that forming with the manufacturing of two-layer microwave sheet material lamination, multi layer substrate comprises the metal covering (1) and the metallic intermediate layer face (2) of upper and lower surface, is filled with two layer medium layer (5) up and down between this three-layer metal face; On the metal covering (1) of metal surface up and down, be carved with the big square ring type clearance channel of the identical periodicity of position, size and Cycle Length (3), be carved with different on the metallic intermediate layer face (2) but center coincidence and the identical little square ring type clearance channel of periodicity (4) of Cycle Length with metal surface gap size up and down; Last square ring type clearance channel (3) unit is to be interval with a series of metal through holes (6) uniformly periodically greatly around each on the good multi layer substrate of lamination, and formation is equivalent to the substrate integrated wave-guide cavity wave of conventional metals cavity; This selection surface be used for plane wave is coupled to cavity and at the etched big square ring type clearance channel in metal surface (1) (3) up and down about length and width both direction symmetry " " shape slit fully; Be used for that electromagnetic wave with a cavity is coupled to another cavity and at the etched little square ring type clearance channel of metallic intermediate layer face (2) (4) about length and width both direction symmetry " " shape slit fully.
2. super thin one side steep filter property frequency selecting surface according to claim 1, it is characterized in that big square ring type clearance channel (3) length of side of metal surface (1) was 2.52 millimeters about this selection surface was when Ka frequency range centre frequency is 30GHz, width is 0.21 millimeter, little square ring type clearance channel (4) length of side of metallic intermediate layer face (2) is 1.35 millimeters, and width is 0.13 millimeter; The working medium substrate is that dielectric constant is 2.2 Rogers5880 material, and its thickness is 0.254 millimeter.
3. super thin one side steep filter property frequency selecting surface according to claim 1, the diameter that it is characterized in that plated-through hole (6) is 0.4 millimeter, the hole heart of two adjacent metal through holes (6) is apart from being 0.6 millimeter between plated-through hole (6) array, and the ratio of plated-through hole (6) diameter and hole heart distance is greater than 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100967922A CN100433448C (en) | 2006-10-17 | 2006-10-17 | Super thin one side steep filter property frequency selecting surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100967922A CN100433448C (en) | 2006-10-17 | 2006-10-17 | Super thin one side steep filter property frequency selecting surface |
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| Publication Number | Publication Date |
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| CN1945894A CN1945894A (en) | 2007-04-11 |
| CN100433448C true CN100433448C (en) | 2008-11-12 |
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| CNB2006100967922A Expired - Fee Related CN100433448C (en) | 2006-10-17 | 2006-10-17 | Super thin one side steep filter property frequency selecting surface |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304980B (en) * | 2015-09-25 | 2019-02-26 | 中国人民解放军空军工程大学 | Based on low Jie's Meta Materials band resistance type frequency-selective surfaces |
| CN105609903B (en) * | 2015-12-23 | 2018-11-16 | 西安电子科技大学 | The high frequency-selective surfaces with angle stabilization of selectivity |
| CN110838610B (en) * | 2018-08-17 | 2022-04-08 | 中国电子科技集团公司第五十五研究所 | One-dimensional filter array dielectric waveguide band-pass filter and design method thereof |
| SE544108C2 (en) * | 2019-10-18 | 2021-12-28 | Metasum Ab | Multi-layer filter, arrangement, and method for production thereof |
| CN113224511B (en) * | 2021-04-23 | 2022-12-16 | 华南理工大学 | Waveguide filter antenna array based on mixed resonant mode resonant cavity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5949387A (en) * | 1997-04-29 | 1999-09-07 | Trw Inc. | Frequency selective surface (FSS) filter for an antenna |
| CN1825678A (en) * | 2006-03-21 | 2006-08-30 | 东南大学 | Frequency selecting surface based on substrate integrated waveguide technology |
| CN1277332C (en) * | 2002-12-16 | 2006-09-27 | Tdk株式会社 | High-frequency assembly and method for providing through-hole in high-frequency assembly |
| CN200965909Y (en) * | 2006-10-17 | 2007-10-24 | 东南大学 | Single side steep drop filter characteristic frequency selection surface |
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2006
- 2006-10-17 CN CNB2006100967922A patent/CN100433448C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5949387A (en) * | 1997-04-29 | 1999-09-07 | Trw Inc. | Frequency selective surface (FSS) filter for an antenna |
| CN1277332C (en) * | 2002-12-16 | 2006-09-27 | Tdk株式会社 | High-frequency assembly and method for providing through-hole in high-frequency assembly |
| CN1825678A (en) * | 2006-03-21 | 2006-08-30 | 东南大学 | Frequency selecting surface based on substrate integrated waveguide technology |
| CN200965909Y (en) * | 2006-10-17 | 2007-10-24 | 东南大学 | Single side steep drop filter characteristic frequency selection surface |
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Granted publication date: 20081112 Termination date: 20211017 |