CN105428762A - Compact ultra-wideband filter with metal groove structure - Google Patents
Compact ultra-wideband filter with metal groove structure Download PDFInfo
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- CN105428762A CN105428762A CN201510977320.7A CN201510977320A CN105428762A CN 105428762 A CN105428762 A CN 105428762A CN 201510977320 A CN201510977320 A CN 201510977320A CN 105428762 A CN105428762 A CN 105428762A
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- metal
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- wide band
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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
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
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Abstract
The invention discloses a compact ultra-bandwidth filter with a metal groove structure. The compact ultra-wideband filter comprises a dielectric plate and a metal injection molding (MIM) grating structure, wherein the MIM grating structure is arranged on the dielectric plate and comprises two metal grating structures and an insulation body, each metal grating structure is provided with more than one group of groove basic units, each groove basic unit is formed by combining a rectangular groove and a round groove, the groove basic units are distributed at equal interval, the groove units of the two metal grating structures are oppositely arranged and face the insulation body, the widths and the lengths of the rectangular grooves, the radius of the round grooves and/or interval parameters of the groove basic units are different, the dispersion characteristics of the rectangular grooves, the round grooves and the groove basic units are different, and different parameters of the rectangular grooves can be selected according to different designed bandwidths of the filter. The size of the whole system becomes more compact and the volume is getting smaller with the introduction of the groove basic units; the MIM grating structure is placed on the dielectric plate so that the integration of the MIM grating structure with an active device is promoted; and by the compact ultra-bandwidth filter, the working frequency band of the filter can be changed according to structural parameters, so that the compact ultra-bandwidth filter can work at a microwave band, a millimeter band and a terahertz band.
Description
Technical field
The present invention relates to a kind of compact ultra-wide band filter, particularly relate to a kind of compact ultra-wide band filter of metal groove structure, belong to wave filter technology field.
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 artificial 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.But metal-insulator-metal type (MIM) optical grating construction proposed at present, the filter as metal groove structure has the following disadvantages: overall filter size or volume constantly can become large along with the increase of the vertical groove degree of depth.
Summary of the invention
The object of the invention is to the deficiency existed for prior art, propose a kind of compact ultra-wide band filter of simple and effective metal groove structure.
Conceive the present invention according to foregoing invention and adopt following technical scheme:
A kind of compact ultra-wide band filter of metal groove structure, comprise MIM optical grating construction, described MIM optical grating construction is made up of identical the first to the second metal grating structure of structure and insulator, described first metal grating structure comprises more than the one group groove elementary cell be equally spaced, described groove elementary cell is combined by a rectangular channel and a circular recess, each chase unit in first and second metal grating structures is placed, in opposite directions all towards insulator.
Further, the width of described rectangular channel, length, the radius of circular recess and/or the basic unit interval of groove are determined by the bandwidth of filter.The working band of filter can be changed by structural parameters, thus microwave section, millimere-wave band and terahertz wave band can be worked in.
Further, the compact ultra-wide band filter of described metal groove structure also comprises dielectric-slab, and described MIM optical grating construction is placed on dielectric-slab.MIM optical grating construction be placed in dielectric-slab is convenient to active device integrated.
Further, the compact ultra-wide band filter of described metal groove structure comprises identical, the symmetrical input of structure and output; Described input comprises first line of rabbet joint of the compact ultra-wide band filter front end being arranged at described metal groove structure, and the input microstrip line construction vertical with described first line of rabbet joint,
Further, the end of described first line of rabbet joint is provided with input first circular groove structure, input microstrip line construction is made up of input second disc structure of a short metal patch and metal patch end, described short metal patch is quarter-wave, described short metal patch distance the first line of rabbet joint end first circular groove vertical range quarter-wave.
The present invention compared with prior art, has following apparent outstanding substantive distinguishing features and remarkable technological progress: the present invention introduces dumb-bell shape groove, makes the reduction 22% compared with the filter based on vertical groove of the overall dimensions of filter.
Accompanying drawing explanation
Fig. 1 is vertical view of the present invention;
Fig. 2 is end view of the present invention;
Fig. 3 is partial enlargement Parameter Map of the present invention;
Fig. 4 is the simulation result of reflection coefficient of the present invention and transmission coefficient;
Wherein 1-MIM optical grating construction, 2-input first circular groove structure, 3-input second disc structure, 4-inputs microstrip line construction, 5-first line of rabbet joint, 6-input, 7-insulator, 8-output, 9-second line of rabbet joint, 10-exports microstrip line construction, 11-output second disc structure, 12-output second circular groove structure, 13-dielectric-slab, 16-air stitches, 14-filter lateral dimension, 15-first line of rabbet joint length, 16-air seam length, 17-is short straight length longitudinally, 18-rectangular channel, 19-circular recess, the basic unit interval of 24-groove, 25-metal groove width, 26-air seam width, 27-metal grating thickness, 28-dielectric substrate thickness.
Embodiment
The technological means realized for making the present invention, creation characteristic, reaching 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 1:
See Fig. 1 and Fig. 2, a kind of compact ultra-wide band filter of metal groove structure, comprise MIM optical grating construction 1, described MIM optical grating construction 1 is made up of identical the first to the second metal grating structure of structure and insulator 7, described first metal grating structure comprises more than the one group groove elementary cell be equally spaced, described groove elementary cell is made up of a rectangular channel 18 and a circular recess 19, and each chase unit in the first and second metal grating structures is placed in opposite directions, all towards insulator 7.
Further, width, the length of described rectangular channel 18, the radius of circular recess 19 and/or the basic unit interval 24 of groove are determined by the bandwidth of filter.The working band of filter can be changed by structural parameters, thus microwave section, millimere-wave band and terahertz wave band can be worked in.
Further, the compact ultra-wide band filter of described metal groove structure also comprises dielectric-slab 13, and described MIM optical grating construction 1 is placed on dielectric-slab 13.MIM optical grating construction be placed in dielectric-slab is convenient to active device integrated.
Further, the compact ultra-wide band filter of described metal groove structure comprises identical, the symmetrical input of structure 6 and output 8, described input 6 comprises first line of rabbet joint 5 of the compact ultra-wide band filter front end being arranged at described metal groove structure, and the input microstrip line construction 4 vertical with described first line of rabbet joint 5, the end of described first line of rabbet joint 5 is provided with input first circular groove structure 2, input microstrip line construction 4 is made up of input second disc structure 3 of a short metal patch and metal patch end, described short metal patch is quarter-wave, described second disc structure can increase electromagnetic between microstrip line with first line of rabbet joint coupling, short metal patch distance the first line of rabbet joint end first circular groove vertical range is also quarter-wave.
The input microstrip line construction 4 being arranged in dielectric-slab 13 back side carrys out the artificial surface phasmon of mim structure 1 on exciting media plate as excitation, input microstrip line construction 4 is vertical with first line of rabbet joint 5.Output and input are symmetric.Input microstrip line construction 4 and input first circular groove structure 2 and input second disc structure 3 be in order to make more electromagnetic wave from microstrip lines to slot line structure on, the output first circular groove structure 12 of output microstrip line construction 10 and the second line of rabbet joint 9 rear end, output second disc structure 11 are to make more electromagnetic wave be coupled to microstrip line to export from the line of rabbet joint.Input microstrip line construction 4 and output microstrip line construction 10 are two the short metal patches being positioned at dielectric-slab 13 back side, and first line of rabbet joint 5 and second line of rabbet joint 9 are two gap structures of mim structure rear and front end.
The present invention can make electromagnetic wave in wider operating frequency range effectively by this device, higher or lower than this frequency range electromagnetic wave then not by, thus realize the function of filtering, in adjustable dumbbell connected in star, the length of rectangular recess or the radius of circular groove can change the width of frequency band
See Fig. 3 and Fig. 4, the present invention makes the size of whole system and volume significantly reduce.In Fig. 3, the lateral dimension 14 of whole system significantly reduces, and compared with adopting the filter of vertical groove completely, can reduce about 22%.Therefore, structure of the present invention is compacter.Fig. 4 is reflection coefficient of the present invention and transmission coefficient simulation result.As can be seen from the figure electromagnetic wave can pass through this structure in very wide frequency range, higher or lower than this frequency range electromagnetic wave then not by, thus achieve the function of filtering.
In the present embodiment, the metal grating structure of support surface wave traveling 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.
The present invention can make electromagnetic wave effectively by this device in wider operating frequency range, higher or lower than this frequency range electromagnetic wave then not by, thus realize the function of filtering.
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 compact ultra-wide band filter of a metal groove structure, it is characterized in that: comprise MIM optical grating construction (1), described MIM optical grating construction (1) is made up of identical the first to the second metal grating structure of structure and insulator (7), described first metal grating structure comprises more than the one group groove elementary cell be equally spaced, described groove elementary cell is made up of a rectangular channel (18) and a circular recess (19), each chase unit in first and second metal grating structures is placed in opposite directions, all towards insulator (7).
2. the compact ultra-wide band filter of the metal groove structure according to claims 1, it is characterized in that: width, the length of described rectangular channel (18), the radius of circular recess (19) and/or the basic unit interval parameter of groove are determined by the bandwidth of filter.
3. the compact ultra-wide band filter of the metal groove structure according to claims 1, is characterized in that: the compact ultra-wide band filter of described metal groove structure also comprises dielectric-slab (13), and described MIM optical grating construction is placed on dielectric-slab (13).
4. the compact ultra-wide band filter of the metal groove structure according to claims 1, is characterized in that: it is identical that the compact ultra-wide band filter of described metal groove structure comprises structure, symmetrical input (6) and output (8); Described input (6) comprises first line of rabbet joint (5) of the compact ultra-wide band filter front end being arranged at described metal groove structure, and the input microstrip line construction (4) vertical with described first line of rabbet joint (5); The end of described first line of rabbet joint (5) is provided with the first circular configuration (2), input microstrip line construction (4) is made up of second disc structure (3) of a short metal patch and metal patch end, described short metal patch is quarter-wave, described short metal patch distance the first line of rabbet joint end first circular groove vertical range quarter-wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510977320.7A CN105428762A (en) | 2015-12-23 | 2015-12-23 | Compact ultra-wideband filter with metal groove structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510977320.7A CN105428762A (en) | 2015-12-23 | 2015-12-23 | Compact ultra-wideband filter with metal groove structure |
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| Publication Number | Publication Date |
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| CN105428762A true CN105428762A (en) | 2016-03-23 |
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| CN201510977320.7A Pending CN105428762A (en) | 2015-12-23 | 2015-12-23 | Compact ultra-wideband filter with metal groove structure |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120019901A1 (en) * | 2010-07-23 | 2012-01-26 | Pinaki Mazumder | Dynamic Terahertz Switch Using Periodic Corrugated Structures |
| CN104362419A (en) * | 2014-11-28 | 2015-02-18 | 桂林电子科技大学 | Ultra-wideband (UWB) manual surface plasmonpolariton bend waveguide |
-
2015
- 2015-12-23 CN CN201510977320.7A patent/CN105428762A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120019901A1 (en) * | 2010-07-23 | 2012-01-26 | Pinaki Mazumder | Dynamic Terahertz Switch Using Periodic Corrugated Structures |
| CN104362419A (en) * | 2014-11-28 | 2015-02-18 | 桂林电子科技大学 | Ultra-wideband (UWB) manual surface plasmonpolariton bend waveguide |
Non-Patent Citations (2)
| Title |
|---|
| XIAOPENG SHEN等: "Conformal surface plasmons propagating on ultrathin and flexible films", 《APPLIED PHYSICAL SCIENCES》 * |
| YONG JIN ZHOU等: "Planar spoof plasmonic ultra-wideband filter based on low-loss and compact terahertz waveguide corrugated with dumbbell grooves", 《APPLIED OPTICS》 * |
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Application publication date: 20160323 |
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