CN104269594A - Planar compact type multi-channel wave splitter based on imitative surface plasmons - Google Patents
Planar compact type multi-channel wave splitter based on imitative surface plasmons Download PDFInfo
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- CN104269594A CN104269594A CN201410492433.3A CN201410492433A CN104269594A CN 104269594 A CN104269594 A CN 104269594A CN 201410492433 A CN201410492433 A CN 201410492433A CN 104269594 A CN104269594 A CN 104269594A
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Abstract
The invention relates to a planar compact type multi-channel wave splitter based on imitative surface plasmons. The wave splitter comprises a dielectric slab and a metal patch on the dielectric slab. Grooves are etched in the metal patch to form a multi-channel wave splitter body. The multi-channel wave splitter body is composed of a plurality of waveguide branches, and each waveguide branch is composed of a metal-insulator-metal (MIM) structure on the dielectric slab. Each MIM structure is composed of two metal gratings and insulators, wherein periodic grooves are etched in the inner sides of the metal gratings, the insulators are arranged between the grooves, and air or insulator media are arranged in the grooves. The depths and/or widths of the grooves in the MIM structures of the waveguide branches are different, so that the constraining degrees of the different branches to electromagnetic waves with different frequencies are different, the electromagnetic waves with different frequencies are guided to be propagated along the different branches, and the function of multi-channel wave splitting is achieved.
Description
Technical field
The present invention relates to a kind of plane compact type multichannel channel-splitting filter based on imitative surface phasmon, this multichannel channel-splitting filter can be used for the communications field, to realize point wave energy of microwave section, millimere-wave band or terahertz wave band.
Background technology
Surface phasmon is the electromagnetic wave being bound by metal and dielectric surface, not by the restriction of optical diffraction limit, thus can be used for structure compact element, in surface or interface tech and data storage etc., there is important application, form surface plasma.The propagation of imitative surface phasmon can be supported by the manual electromagnetic structure formed desirable conductive surface process-cycle micro-structural (its characteristic size is much smaller than wavelength).Utilize manual electromagnetic structure can handle electromagnetic wave propagation more easily, realize various new function element.The channel-splitting filter structure based on imitative surface phasmon proposed at present is simple metal structure, and the thickness of metal is generally approximately infinitely great, is unfavorable for other flat surface active device integrated.The present invention proposes a kind ofly to be convenient to the plane compact type multichannel channel-splitting filter that surface phasmon is imitated in the support integrated with flat surface active device, its compact conformation, is easy to processing, and functional.
Summary of the invention
The object of the invention is to the deficiency existed for prior art, propose a kind of plane compact type multichannel channel-splitting filter based on imitative surface phasmon.This multichannel channel-splitting filter can work in microwave section, millimere-wave band and terahertz wave band.
For achieving the above object, design of the present invention is: the multichannel channel-splitting filter that the present invention proposes is made up of multiple Waveguide branching, each Waveguide branching is made up of mim structure on dielectric-slab, this mim structure is made up of the metal grating structure and middle insulator (can be air or other media) being etched with periodic grooves inside two panels, the parameters such as the metal grating depth of groove in each Waveguide branching mim structure of this channel-splitting filter or width are different, make the electromagnetic constraint degree of different branch to different frequency different, thus guide the electromagnetic wave of different frequency to propagate along different branch, to realize the function of multichannel partial wave.This channel-splitting filter adopts CPW to carry out the imitative surface phasmon on exciting media plate in mim structure as feed; Isolation during for improving low frequency between each Waveguide branching, partial waveguide divides to support the front and needs to introduce specially designed band stop filter.
The present invention realizes by the following technical solutions:
A kind of plane compact type multichannel channel-splitting filter based on imitative surface phasmon, comprise the metal patch on dielectric-slab and dielectric-slab, it is characterized in that: this metal patch has the multichannel channel-splitting filter that the groove of etching is formed, this multichannel channel-splitting filter is by multiple Waveguide branching (3, 4, 5, 6) form, and branch is by the upper metal-insulator-metal type (metal-insulator-metal of dielectric-slab (12), MIM) structure, this mim structure is made up of the metal grating and middle insulator (can make air or dielectric) being etched with periodic grooves inside two panels, the parameters such as the depth of groove in each Waveguide branching mim structure or width are different, make the electromagnetic constraint degree of different branch to different frequency different, thus guide the electromagnetic wave of different frequency to propagate along different branch, to realize the function of multichannel partial wave.Co-planar waveguide is used to carry out the imitative surface phasmon on exciting media plate in mim structure as driving source; Isolation during for improving low frequency between each Waveguide branching, partial waveguide divides to support the front and needs to introduce specially designed band stop filter.
The present invention compared with prior art, has following apparent outstanding substantive distinguishing features and remarkable technological progress:
On intermediary of the present invention scutum, mim structure is planar structure, the isolation between each Waveguide branching can be substantially improved by introducing band stop filter, processing technology and now ripe printed circuit board (PCB) (PCB) technical compatibility, can be integrated in planar circuit easily.
Accompanying drawing explanation
Fig. 1 is the multichannel channel-splitting filter structural representation (vertical view) based on imitative surface phasmon that the present invention proposes.
Fig. 2 is the front view of Fig. 1.
Fig. 3 is a Waveguide branching structural representation.
Fig. 4 is band stop filter concrete structure schematic diagram.
Fig. 5 is band stop filter transmission coefficient
s 21(Fig. 3 middle port 2 is to the transmission coefficient of port one) figure.
Embodiment
The technological means that the present invention is realized, creation characteristic, reach object and effect and be easy to understand and understand, below in conjunction with accompanying drawing and preferred embodiment, set forth the present invention further.
Embodiment one:
See Fig. 1-4, this is based on the plane compact type multichannel channel-splitting filter of imitative surface phasmon, it comprises the metal patch (13) on dielectric-slab (12) and dielectric-slab, it is characterized in that: described metal patch (13) has the groove of etching form multichannel channel-splitting filter, this multichannel channel-splitting filter is by multiple Waveguide branching (3, 4, 5, 6) form, be made up of the upper metal-insulator-metal type mim structure of dielectric-slab (12), this mim structure is made up of the insulator (10) that the metal grating (2) and groove that are etched with periodic grooves inside two panels are middle, air or insulator medium in groove, groove (11) degree of depth in the mim structure of each Waveguide branching and/or width difference, make the electromagnetic constraint degree of different branch to different frequency different, thus guide the electromagnetic wave of different frequency to propagate along different branch, to realize the function of multichannel partial wave.
Embodiment two:
The present embodiment is substantially identical with embodiment one, and special feature is as follows:
Described Waveguide branching (3,4,5,6) in the shape of the upper etching period groove of metal patch (2) is: the width such as straight groove of transverse direction and many vertical even depth be equally spaced longitudinally directly texturearunaperpendicular is crossing forms.Co-planar waveguide (1) is adopted to carry out the imitative surface phasmon in the upper mim structure of exciting media plate (12) as feed; This co-planar waveguide (1) be described two panels be etched with periodic grooves metal grating (2) between a strip metal paster.Isolation during for improving low frequency between each Waveguide branching, partial waveguide branch (4,5,6) front introducing band stop filter (7,8,9), this band stop filter (7,8,9) is the groove on the metal patch (13) that is connected with Waveguide branching (4,5,6), its transverse concave groove is connected with the transverse concave groove of Waveguide branching, and longitudinal fluting to be length alternate be equally spaced wait width gap.
Embodiment three:
See Fig. 1 and 2, this is based on the compact multichannel channel-splitting filter of plane (the present embodiment is four tunnels) of imitative surface phasmon, realized by the metal grating mim structure of the upper processing of the metal patch (13) in dielectric-slab (12) different geometrical size, utilize co-planar waveguide (1) as feed to excite the imitative surface phasmon in mim structure, by improving the isolation between low frequency Shi Ge branch in partial waveguide branch (4,5,6) front end introducing band stop filter (7,8,9).This planar structure is convenient to flat surface active device integrated, and the embodiment that Fig. 1 and Fig. 2 provides is No. four channel-splitting filters, is also fine more than four tunnels.Fig. 3 gives a Waveguide branching structure.Figure medium substrate thickness is
d, dielectric-slab upper strata metal grating thickness is
t, metal groove width and cycle be divided into
w_gwith
p 1, depth of groove
h(depth of groove of each branch is different), air seam width
w.(1) be coplanar waveguide structure, use it as feed to excite the imitative surface phasmon in mim structure.
See Figure 4 and 5, as shown in Figure 4, be made up of the compounding period with two kinds of depths of groove, wherein more shallow and darker depth of groove is respectively this band stop filter structure based on the multichannel channel-splitting filter element branches front end of imitative surface phasmon
h 1with
h 2, the cycle of composite construction is
p 2.The filter of each branch front end
h 1with
h 2be different, all the other parameters are the same.Its adopts composite periodicity metal grating structure composition, wherein each branch front end filter
h 1with
h 2not identical.By suitable adjustment
h 1with
h 2value, the Waveguide branching of the electromagnetic wave of the frequency of needs by specifying can being made, filtering out unwanted electromagnetic wave simultaneously, thus improve isolation between branch.Fig. 4 is that the band stop filter of this kind of structure is in difference
h 1with
h 2when transmission coefficient
s 21figure, three kinds
h 1with
h 2three passbands can be produced respectively when combination, can allow to need the electromagnetic wave of frequency to pass through.As can be seen from the figure this structure has the function of band stop filter, can only allow the electromagnetic wave needing frequency pass through.
Support in the present embodiment that the metal grating structure that imitative surface phasmon is propagated is different according to working frequency range, different processing technology can be adopted to be realized, such as PCB technology, Electric Discharge Wire-cutting Technology or photoetching process etc.
In the present embodiment, first by the dispersion curve of mim structure on Electromagnetic Simulation tool analysis dielectric-slab, by controlling the difference of the surface groove degree of depth of limited thickness metal grating structure, change each branch to the electromagnetic constraint ability of different frequency, thus the electromagnetic wave of different frequency can be propagated with the function realizing multichannel partial wave along different branches.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (4)
1. the plane compact type multichannel channel-splitting filter based on imitative surface phasmon, it comprises the metal patch (13) on dielectric-slab (12) and dielectric-slab, it is characterized in that: described metal patch (13) has the groove of etching form multichannel channel-splitting filter, this multichannel channel-splitting filter is by multiple Waveguide branching (3, 4, 5, 6) form, by upper metal-insulator-metal type (MIM) Structure composing of dielectric-slab (12), this mim structure is made up of the insulator (10) that the metal grating (2) and groove that are etched with periodic grooves inside two panels are middle, air or insulator medium in the middle of groove, groove (11) degree of depth in the mim structure of each Waveguide branching and/or width difference, make the electromagnetic constraint degree of different branch to different frequency different, thus guide the electromagnetic wave of different frequency to propagate along different branch, to realize the function of multichannel partial wave.
2. the plane compact type multichannel channel-splitting filter based on imitative surface phasmon according to claims 1, is characterized in that: described Waveguide branching (3,4,5,6) in the shape of the upper etching period groove of metal patch (13) is: the width such as straight groove of transverse direction and many vertical even depth be equally spaced longitudinally directly texturearunaperpendicular is crossing forms.
3. the plane compact type multichannel channel-splitting filter based on imitative surface phasmon according to claims 1, is characterized in that: adopt co-planar waveguide (1) to carry out the imitative surface phasmon in the upper mim structure of exciting media plate (12) as feed; This co-planar waveguide (1) be described two panels be etched with periodic grooves metal grating (2) between a strip metal paster.
4. the plane compact type multichannel channel-splitting filter based on imitative surface phasmon according to claims 1, it is characterized in that: isolation during for improving low frequency between each Waveguide branching, partial waveguide branch (4,5,6) front introducing band stop filter (7,8,9), this band stop filter (7,8,9) is the groove on the metal patch (13) that is connected with Waveguide branching (4,5,6), its transverse concave groove is connected with the transverse concave groove of Waveguide branching, and longitudinal fluting to be length alternate be equally spaced wait width gap.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597564A (en) * | 2015-01-16 | 2015-05-06 | 哈尔滨工业大学深圳研究生院 | Quasi-surface plasma combined type slit wave guide and application thereof |
| CN104701590A (en) * | 2015-03-24 | 2015-06-10 | 南京航空航天大学 | Novel broadband surface plasma band-pass filter |
| CN105762527A (en) * | 2016-02-21 | 2016-07-13 | 上海大学 | Electromagnetic energy collection structure integrating surface plasmon coupler and planar semi-Maxwell fisheye lens |
| CN110011007A (en) * | 2019-03-20 | 2019-07-12 | 南京航空航天大学 | Bandstop filter based on artificial surface plasmon transmission line |
| CN110060981A (en) * | 2019-03-27 | 2019-07-26 | 海宁利伊电子科技有限公司 | Electromagnetic interference (EMI) emissions based on artificial surface plasma inhibit structure |
| CN114678670A (en) * | 2022-04-20 | 2022-06-28 | 电子科技大学 | Terahertz broadband band elimination filter based on SSPPs transmission line |
-
2014
- 2014-09-24 CN CN201410492433.3A patent/CN104269594A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597564A (en) * | 2015-01-16 | 2015-05-06 | 哈尔滨工业大学深圳研究生院 | Quasi-surface plasma combined type slit wave guide and application thereof |
| CN104597564B (en) * | 2015-01-16 | 2018-03-30 | 哈尔滨工业大学深圳研究生院 | The compound narrow slit wave-guide of one species surface plasma and its application |
| CN104701590A (en) * | 2015-03-24 | 2015-06-10 | 南京航空航天大学 | Novel broadband surface plasma band-pass filter |
| CN104701590B (en) * | 2015-03-24 | 2017-09-26 | 南京航空航天大学 | A kind of Wideband surface plasma bandpass filter |
| CN105762527A (en) * | 2016-02-21 | 2016-07-13 | 上海大学 | Electromagnetic energy collection structure integrating surface plasmon coupler and planar semi-Maxwell fisheye lens |
| CN110011007A (en) * | 2019-03-20 | 2019-07-12 | 南京航空航天大学 | Bandstop filter based on artificial surface plasmon transmission line |
| CN110011007B (en) * | 2019-03-20 | 2020-11-06 | 南京航空航天大学 | Band elimination filter based on artificial surface plasmon transmission line |
| CN110060981A (en) * | 2019-03-27 | 2019-07-26 | 海宁利伊电子科技有限公司 | Electromagnetic interference (EMI) emissions based on artificial surface plasma inhibit structure |
| CN110060981B (en) * | 2019-03-27 | 2024-05-31 | 海宁利伊电子科技有限公司 | Electromagnetic interference radiation suppression structure based on artificial surface plasma |
| CN114678670A (en) * | 2022-04-20 | 2022-06-28 | 电子科技大学 | Terahertz broadband band elimination filter based on SSPPs transmission line |
| CN114678670B (en) * | 2022-04-20 | 2023-01-17 | 电子科技大学 | Terahertz broadband band elimination filter based on SSPPs transmission line |
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