CN200965909Y - Single side steep drop filter characteristic frequency selection surface - Google Patents
Single side steep drop filter characteristic frequency selection surface Download PDFInfo
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- CN200965909Y CN200965909Y CN 200620126097 CN200620126097U CN200965909Y CN 200965909 Y CN200965909 Y CN 200965909Y CN 200620126097 CN200620126097 CN 200620126097 CN 200620126097 U CN200620126097 U CN 200620126097U CN 200965909 Y CN200965909 Y CN 200965909Y
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Abstract
A unilateral abrupt decreasing filter characteristic frequency selective surface can be applied to the multi-frequency antenna of communication system, such as satellite and radar, as band multiplexer. The production structure is based on the multilayer substrate with three metal surfaces and the two-tier dielectric layer laminated by the two-tier microwave plate. Wherein, two cyclical big square ring slits with same size (3) are positioned on both the upper and bottom metal surfaces(1), another small cyclical square ring slit with smaller size (4), the center of which is coincident with the upper and bottom metal surfaces(1), is positioned in the middle of metal surface (2). Two layers of media (5) are filled among the three intermediate metals. A plurality of metal via holes (6) are positioned around each cyclical square ring slit unit with uniform space on the laminated multilayer substrate layer, which forms a substrate integrated waveguide cavity that is equivalent to traditional metal cavity. In the utility model, the selective character of the single side band on the selective surface is greatly improved, and the thickness is only one sixth of the traditional cascade structure, and the single side band on the selective surface has a stable passband and selective characteristic for the angle of the incident light and changes in the polarity.
Description
Technical field
The utility model is a kind ofly to 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 utility model provides a kind of formation based on the substrate integrated wave-guide cavity wave cascade and has the frequency-selective surfaces that filtering characteristic falls in super thin one side suddenly, this frequency-selective surfaces is good in the working frequency range stability, thickness reduces greatly, be 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: one side steep filter property frequency selecting surface of the present utility model 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 utility model.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 utility model.
Fig. 3 is the perspective view of the local unit of a signal of the utility model.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 utility model is applied to the Ka wave band.
Fig. 5 is the utility model 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 utility model 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 utility model 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:
| P(mm) L(mm) W(mm) h(mm) d(mm) ε r | 7.16 2.52 1.35 0.254 0.4 2.2 | C(mm) L m(mm) W m(mm) mh(mm) d p(mm) | 7.16 0.21 0.13 0.018 0.6 |
Claims (3)
1. 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 upper and lower surface, open simultaneously measure-alike big square ring type clearance channel (3), the little square ring type clearance channel (4) of another size that overlaps with upper and lower surface square ring type clearance channel (3) in the last etching center of intermetallic metal face (2); 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; With being used for that electromagnetic wave with a cavity is coupled to another cavity 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. 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) the crack 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. 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.
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| CN 200620126097 CN200965909Y (en) | 2006-10-17 | 2006-10-17 | Single side steep drop filter characteristic frequency selection surface |
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| CN 200620126097 CN200965909Y (en) | 2006-10-17 | 2006-10-17 | Single side steep drop filter characteristic frequency selection surface |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100433448C (en) * | 2006-10-17 | 2008-11-12 | 东南大学 | Super thin one side steep filter property frequency selecting surface |
| CN103531918A (en) * | 2013-09-29 | 2014-01-22 | 西安电子科技大学 | Broadband substrate integrated waveguide circularly polarized antenna array and manufacturing method thereof |
| CN104885291A (en) * | 2012-10-25 | 2015-09-02 | 梅萨普莱克斯私人有限公司 | Antenna and filter structures |
| CN107039772A (en) * | 2015-10-28 | 2017-08-11 | 艾诺格思公司 | Antenna for wireless charging system |
| CN107425290A (en) * | 2017-09-05 | 2017-12-01 | 杭州泛利科技有限公司 | A kind of bilateral steep drop bandwidth tunable FSS |
-
2006
- 2006-10-17 CN CN 200620126097 patent/CN200965909Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100433448C (en) * | 2006-10-17 | 2008-11-12 | 东南大学 | Super thin one side steep filter property frequency selecting surface |
| CN104885291A (en) * | 2012-10-25 | 2015-09-02 | 梅萨普莱克斯私人有限公司 | Antenna and filter structures |
| CN103531918A (en) * | 2013-09-29 | 2014-01-22 | 西安电子科技大学 | Broadband substrate integrated waveguide circularly polarized antenna array and manufacturing method thereof |
| CN103531918B (en) * | 2013-09-29 | 2015-09-09 | 西安电子科技大学 | A kind of broad-band chip integrated waveguide circular polarized antenna array and preparation method thereof |
| CN107039772A (en) * | 2015-10-28 | 2017-08-11 | 艾诺格思公司 | Antenna for wireless charging system |
| CN107425290A (en) * | 2017-09-05 | 2017-12-01 | 杭州泛利科技有限公司 | A kind of bilateral steep drop bandwidth tunable FSS |
| CN107425290B (en) * | 2017-09-05 | 2023-09-12 | 杭州泛利科技有限公司 | Bilateral abrupt-drop bandwidth adjustable frequency selection surface |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |