CN105703041B - Miniaturization low-pass filter based on artificial surface phasmon - Google Patents
Miniaturization low-pass filter based on artificial surface phasmon Download PDFInfo
- Publication number
- CN105703041B CN105703041B CN201610184142.7A CN201610184142A CN105703041B CN 105703041 B CN105703041 B CN 105703041B CN 201610184142 A CN201610184142 A CN 201610184142A CN 105703041 B CN105703041 B CN 105703041B
- Authority
- CN
- China
- Prior art keywords
- slot
- planar waveguide
- artificial surface
- miniaturization
- pass filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
-
- 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
Abstract
The present invention discloses a kind of miniaturization low-pass filter based on artificial surface phasmon, it is characterized in that being mainly made of co-planar waveguide, the slot cell array along co-planar waveguide length direction periodic distribution is respectively arranged on two counterpoise groundings of co-planar waveguide, it is symmetrical above and below about center conductor band between two slot cell arrays, for slot unit depth in co-planar waveguide length direction from two sides to middle part uniform increments, the slot unit depth at middle part is constant.The present invention is on the basis of co-planar waveguide, and using co-planar waveguide, etching period slot unit constructs artificial surface plasmon structures to realize filter function on counterpoise grounding.T-slot is introduced, increases slot in the equivalent depth of width direction, realizes device miniaturization.The invention has that structure is simple, compact dimensions, filtering performance are good, easy processing, the series of advantages such as is especially suitable for using with traditional microwave transmission line and device matching.
Description
Technical field
The present invention relates to a kind of filter more particularly to a kind of miniaturization low-pass filtering based on artificial surface phasmon
Device.
Background technique
Surface phasmon (Surface Plasmon Polaritons, abbreviation SPPs) is that a kind of light frequency is interior in gold
A kind of special electromagnetic wave for belonging to and being transmitted on medium (usually air) interface.SPPs is a kind of surface wave, and there are two types of tools
Distinct feature: first, along being a kind of evanescent waves perpendicular to interface, the intensity of wave exponentially reduces, therefore wave is bound
Near interface；Secondly, the transmission wavelength of SPPs is shorter, therefore it can break through diffraction limit.For SPPs research once
It had once been limited in optical band or higher frequency.Generally all in ultraviolet band, metal exists the plasma frequency of metal
The dielectric constant of low-frequency range is very big, so that the skin depth very little of electromagnetic wave, so, in low-frequency range, metal, which is similar to ideal, is led
Body (Perfect Electric Conductor, abbreviation PEC).So that SPPs constrains very poor, nothing in the field of metal surface
Method realizes there is effect spread on the metal surface, greatly limits SPPs in the application of low-frequency range.Due to the good characteristic of SPPs, if
By the concept of surface plasmons to low-frequency range (microwave or terahertz wave band), help to obtain high constrained microwave
Or the guided wave technology of terahertz signal, and it is highly integrated to realize that the device size of low-frequency range is reduced to sub-wavelength magnitude.For
Realize the efficient constraint in low-frequency range to wave, a kind of method of the etching groove on metal or borehole is suggested, due to it after
The relevant nature of SPPs, referred to as artificial surface phasmon (Spoof Surface Plasmon Polaritons, letter are held
Claim SSPPs).Its basic thought is to dig the hole of period profile in metal surface, and the size of hole and interval are much smaller than wavelength,
To enhance the osmosis of electromagnetic wave, to reduce the plasma frequency of metal surface by the means of effective medium.It is this
Method can control the transmission of wave by the geometric dimension of structure, have very big potentiality in the design of microwave Terahertz.2005,
Hibbins et al. confirms SSPPs phenomenon in microwave section, and then, Williams et al. also demonstrates SSPPs in terahertz wave band
Presence, for low frequency SPPs development and application opened new page.SSPPs causes the great interest of researcher since then.
Recently, the research of some transmission for Spoof SPPs sees major periodical there are many achievement.In these researchs
In, most of is all passive structure or device, these devices can not individually complete work because this to feed efficiency with
And the transmission of signal has certain difficulty.In general, these designs need to combine with microwave Terahertz circuit or device.Cause
This, the converting transmission efficiency of guided wave and spp wave is particularly important.The efficiency of transmission conversion is dedicated to, for prism, light
Grid, the research of domino array etc. obtain some achievements successively.But the mismatch of wave vector results in transmission transfer efficiency not
Desirable can be reached.In consideration of it, a kind of structure of gradual change type is suggested to solve the problem of wave vector is not matched that with impedance.Its
Secondary, the miniaturization of microwave device is the project that not can bypass, and plays important function in the design of microwave circuit system.English
State scholar proposes that a kind of structure for being bent convolution metal band by square realizes the increase of metal minor matters equivalent length, it is rear on
Extra large university week forever further apply by golden done miniaturization.
Co-planar waveguide is as a kind of superior performance, microwave planar transmission line easy to process, in monolithic integrated microwave circuit
In just play a greater and greater role, especially arrived millimeter wave frequency band, co-planar waveguide more possesses the incomparable property of microstrip line
It can advantage.Compared with conventional microstrip transmission line, co-planar waveguide, which has, is easy production, and passive, active device easy to accomplish is micro-
Series connection and (not needing to perforate on substrate) in parallel, easy the advantages that improving current densities in wave circuit.
Summary of the invention
It is an object of the invention to will support the artificial surface plasma waveguide of SSPPs and support the co-planar waveguide of space wave
In conjunction with designing a kind of miniaturization low-pass filter based on artificial surface phasmon.
The technical scheme of the present invention is realized as follows:
A kind of miniaturization low-pass filter based on artificial surface phasmon, it is characterised in that mainly by co-planar waveguide structure
At, the slot cell array along co-planar waveguide length direction periodic distribution is respectively arranged on two counterpoise groundings of co-planar waveguide,
It is symmetrical above and below about center conductor band between two slot cell arrays, slot unit depth co-planar waveguide length direction from two sides to
The slot unit depth of middle part uniform increments, middle part is constant.
The present invention is on the basis of co-planar waveguide, and using co-planar waveguide, etching period slot unit is constructed on counterpoise grounding
Artificial surface plasmon structures are to realize filter function.
Further, the slot unit of T-shaped structure has also been devised in the present invention, for increasing slot unit in co-planar waveguide width side
To equivalent depth, to further realize the miniaturization of device.
For the SSPPs propagated on the co-planar waveguide for having periodical sub-wavelength rectangular recess array, different groove depths
There is a different dispersion curves, the wave vector of different depth slots is different, and wave vector and impedance may be implemented by the gradual change of groove depth
Matching；Furthermore since the plasma frequency of SSPPs is controlled by surface geometry, so artificial surface plasma waveguide has
Adjustable chromatic dispersion characteristic；The present invention can be controlled final by several units of the middle part depth constant part of slot cell array
Cutoff frequency realizes the function of controllably filtering.The design of T-slot increases slot unit in the equivalent of co-planar waveguide width direction
Depth realizes smallerization of filter geometric dimension.
The present invention is suitble to use with traditional microwave transmission lines matching, designed for filtering device and application provide it is a kind of completely newly
Thinking and scheme.
The invention has the following beneficial effects:
1. the present invention mainly proposes a kind of miniaturization low-pass filter based on artificial surface phasmon, on the one hand utilize
On the other hand the superior transmission performance of co-planar waveguide utilizes the adjustable chromatic dispersion characteristic of artificial surface plasma waveguide, realizes
The low-pass filter effect of signal transmission.This structure can be connected with microwave device or Circuit Matching, and then in microwave device
With in the design of integrated circuit structure have greater flexibility,
2. structure is simple: structure is derived from co-planar waveguide, wave vector and impedance matching section and SSPPs transmission is existed by co-planar waveguide
Ground etching period slot array is constituted, and simple structure is compact, facilitates processing.
3. strong innovation, technology is perspective good: the present invention utilizes artificial surface plasma waveguide and coplanar in microwave frequency band
The combination of waveguide realizes low-frequency filter characteristics, strong innovation；It can be used cooperatively with traditional microwave transmission line well, just
In being integrated into microwave circuit, the application range of artificial surface plasma device has been expanded, has had good technology perspective.
4. filtering performance is strong: filtering performance is derived from the transmission characteristic of artificial surface plasma, and Out-of-band rejection is significant, with interior biography
It is defeated functional.
5. realizing the Miniaturization Design of device: by introducing T-shaped structure slot, increasing the equivalent depth of slot, realize and hanging down
Directly in the miniaturization of the length in transmission direction.
Detailed description of the invention:
Fig. 1 is the dispersion element structure three-dimensional schematic diagram of embodiment one；
Fig. 2 is the dispersion curve figure of the difference groove depth of dispersion element structure shown in Fig. 1；
Fig. 3 is the overall structure schematic three dimensional views of embodiment one；
Fig. 4 is the slot array detail structure diagram of embodiment one；
Fig. 5 is the corresponding S parameter of embodiment one；
Fig. 6 is the overall structure schematic three dimensional views of embodiment two；
Fig. 7 is the slot array detail structure diagram of embodiment two；
Fig. 8 is the corresponding S parameter of embodiment two.
Specific embodiment:
The implementation of technical solution is described in further detail with reference to the accompanying drawing:
Embodiment one
As shown in figure 3, structure of the invention based on co-planar waveguide, is etched on two metallic ground band along coplanar wave
The rectangular configuration slot cell array of length direction (direction x) periodic distribution is led, slot cell array is about co-planar waveguide width side
It is symmetrical above and below about center conductor band between two slot cell arrays to (direction y) bilateral symmetry.Slot unit depth (the i.e. direction y
Height) in the direction x constitute pattern match section, the constant composition of slot unit depth at middle part from two sides to middle part uniform increments
SSPPs span line, the constant slot element number of the slot element number and middle part depth of two sides depth gradual change is according to guided wave signals
Transmission requirement setting.
The medium substrate of filter is Rogers 6010 (dielectric constant 10.2), and Fig. 1 is in embodiment one comprising rectangle
The period dispersion element structure of slot unit, length (i.e. slot cell distribution period) are p=4mm, width W=20mm, medium base
Plate thickness a=1.0mm, metal layer thickness t=0.018mm, the width b=0.5mm of rectangular channel, depth variable h.Utilize electromagnetism
Simulation software emulates the period dispersion element structure of Fig. 1, can be obtained variable h from 1.0mm to 5.0mm uniformly increase under
Dispersion result is as shown in Figure 2.Asymptotic frequency and the depth of slot are associated known to the distribution of curve, and gradually with the increase of groove depth
Nearly frequency reduces.
The overall structure of low-pass filter is illustrated as shown in figure 3, the length of structure is L=100mm, width W=20mm,
Dielectric substrate thickness a=1.0mm, metal layer thickness t=0.018mm.
As shown in figure 4, co-planar waveguide signal line width w1=3mm, is spaced g=0.8mm, to structure between signal wire and ground
Build the impedance of port 50ohm.The width of the present embodiment rectangular channel unit is b=0.5mm, along the direction x by period p=4mm points
Cloth.Groove depth uniformly increases from h1=0.8mm to h6=4.8mm from both ends to middle part depth, and the depth of intermediate 7 slot units is
4.8mm。
According to embodiment one, S parameter result as shown in Figure 5 can be obtained using electromagnetic simulation software.It is left 0 to 5.5GHz
Right electromagnetic wave can form effective cut-off with high efficiency of transmission at 5.5GHz, with outer S21 in -40dB hereinafter, basic with interior S11
Below -10dB.
Embodiment two
As shown in fig. 6, consistent with one basic structure of embodiment, difference is that the slot unit of the present embodiment uses T-type structure,
Integrally-built length is L=100mm, width W=20mm, dielectric substrate thickness a=1.0mm, metal layer thickness t=
0.018mm。
As shown in fig. 7, co-planar waveguide signal line width w1=3mm, is spaced g=0.8mm, to structure between signal wire and ground
Build the impedance of port 50ohm.The lateral minor matters of the present embodiment T-slot unit and vertical minor matters width are equal for b=0.5mm, cross
Can also be unequal to minor matters and vertical minor matters width, according to guided wave signals transmission requirement be arranged, along the direction x by period p=
4mm distribution.The constant perseverance of minor matters length of the T-slot unit in the direction x is q=2.5mm, and depth is from h1=0.5mm to h6=3.0mm
Uniformly increase, the depth of intermediate 7 slot units is 3.0mm.
According to embodiment two, S parameter result as shown in Figure 8 can be obtained using electromagnetic simulation software.It is left 0 to 5.5GHz
Right electromagnetic wave can form effective cut-off with high efficiency of transmission at 5.5GHz, with outer S21 in-35dB hereinafter, with interior S11-
15dB or less.
In above-described embodiment, slot cell array be it is symmetrical, in practical applications, may be set to be asymmetric
Situation.In above-described embodiment, any end of filter can be used as the input terminal of guided wave signals, and the other end is correspondingly used as defeated
Outlet.
The filter of T-slot structure designed by the present invention reaches the direction y that the 5.5GH cut-off in result needs T-slot
Minor matters length is 3mm, and the transmission in passband meets efficient requirement.And to reach same known to the dispersion curve of Fig. 2
The depth that T-slot is changed to rectangle its slot will be reached about 4.8mm by cutoff frequency (the about asymptotic frequency of dispersion curve).Its reason
It is equivalent depth of the transverse structure of T-slot equivalent to increase slot in the direction y, and the asymptotic frequency of dispersion curve of SSPP structure
Rate groove it is deep-controlled, the more deep asymptotic frequency of slot is smaller.So realizing the miniaturization in the direction y.
When dielectric board material variation, if dielectric constant becomes smaller, then dielectric-slab weakens the restraint performance of electromagnetic energy,
The cutoff frequency of filter is caused to increase.Such case uses T-slot structure, and equally can achieve reduces frequency and devices small
The purpose of change.
Claims (5)
1. a kind of miniaturization low-pass filter based on artificial surface phasmon, it is characterised in that mainly by co-planar waveguide structure
At, the slot cell array along co-planar waveguide length direction periodic distribution is respectively arranged on two counterpoise groundings of co-planar waveguide,
It is symmetrical above and below about center conductor band between two slot cell arrays, slot unit depth co-planar waveguide length direction from two sides to
The slot unit depth of middle part uniform increments, middle part is constant.
2. a kind of miniaturization low-pass filter based on artificial surface phasmon according to claim 1, feature exist
In: the slot unit is in rectangular configuration.
3. a kind of miniaturization low-pass filter based on artificial surface phasmon according to claim 1, feature exist
In: the T-shaped structure of slot unit.
4. a kind of low-pass filter based on the miniaturization of artificial surface phasmon according to claim 1, feature exist
In: slot cell array is about co-planar waveguide width direction bilateral symmetry.
5. a kind of low-pass filter based on the miniaturization of artificial surface phasmon according to claim 1, feature exist
In: input terminal of any end of filter as guided wave signals, the other end is as output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184142.7A CN105703041B (en) | 2016-03-28 | 2016-03-28 | Miniaturization low-pass filter based on artificial surface phasmon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184142.7A CN105703041B (en) | 2016-03-28 | 2016-03-28 | Miniaturization low-pass filter based on artificial surface phasmon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105703041A CN105703041A (en) | 2016-06-22 |
| CN105703041B true CN105703041B (en) | 2019-04-16 |
Family
ID=56233041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610184142.7A Expired - Fee Related CN105703041B (en) | 2016-03-28 | 2016-03-28 | Miniaturization low-pass filter based on artificial surface phasmon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105703041B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935947A (en) * | 2017-04-12 | 2017-07-07 | 南京航空航天大学 | The tunneling effect and its method of work of artificial surface plasmon |
| CN109244609B (en) * | 2018-09-11 | 2019-10-29 | 区庆元 | A kind of square groove structure microwave filter with dual band operation characteristic |
| CN109904575B (en) * | 2019-03-07 | 2022-01-07 | 南京邮电大学 | Artificial surface plasmon transmission line based on Delta Stubs structure |
| CN110137639A (en) * | 2019-05-17 | 2019-08-16 | 厦门大学 | A kind of miniaturization variable band-pass filter based on artificial surface phasmon |
| CN111370820B (en) * | 2020-03-20 | 2021-05-25 | 厦门大学 | Adjustable band elimination filter based on artificial surface plasmon |
| CN114883767B (en) * | 2022-05-25 | 2023-02-24 | 厦门大学 | Low-pass rectangular waveguide with band-stop characteristic and internally inserted with SSPP material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040071916A (en) * | 2003-02-07 | 2004-08-16 | 박익모 | Lowpass Filter Using CPW Structure with Inductive Etched Hole |
| CN104701590A (en) * | 2015-03-24 | 2015-06-10 | 南京航空航天大学 | Novel broadband surface plasma band-pass filter |
| CN104730624A (en) * | 2015-03-31 | 2015-06-24 | 东南大学 | Device for realizing conversion between space waves and artificial terahertz surface plasmon polariton (SPP) waves |
| CN104993203A (en) * | 2015-06-25 | 2015-10-21 | 南京航空航天大学 | Trap wave coplanar waveguide based on artificial surface plasmon |
-
2016
- 2016-03-28 CN CN201610184142.7A patent/CN105703041B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040071916A (en) * | 2003-02-07 | 2004-08-16 | 박익모 | Lowpass Filter Using CPW Structure with Inductive Etched Hole |
| CN104701590A (en) * | 2015-03-24 | 2015-06-10 | 南京航空航天大学 | Novel broadband surface plasma band-pass filter |
| CN104730624A (en) * | 2015-03-31 | 2015-06-24 | 东南大学 | Device for realizing conversion between space waves and artificial terahertz surface plasmon polariton (SPP) waves |
| CN104993203A (en) * | 2015-06-25 | 2015-10-21 | 南京航空航天大学 | Trap wave coplanar waveguide based on artificial surface plasmon |
Non-Patent Citations (1)
| Title |
|---|
| 基于人工表面等离子体激元带通滤波器的设计;肖丙刚，陈静，孔胜;《电子元件与材料》;20160228;第35卷(第2期);第43-46页 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105703041A (en) | 2016-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105703041B (en) | Miniaturization low-pass filter based on artificial surface phasmon | |
| Radisic et al. | Novel 2-D photonic bandgap structure for microstrip lines | |
| CN104701590B (en) | A kind of Wideband surface plasma bandpass filter | |
| Zheng et al. | A compact waveguide slot filtering antenna based on mushroom-type surface | |
| CN108987924A (en) | Substrate integration wave-guide bimodulus filter antenna with more radiation zeros | |
| CN110137639A (en) | A kind of miniaturization variable band-pass filter based on artificial surface phasmon | |
| Zhao et al. | Tri-band band-pass filter based on multi-mode spoof surface plasmon polaritons | |
| CN114335955B (en) | Unequal-division band-pass filtering power divider based on HMSIW-SSPP mixed mode | |
| Huang et al. | Compact U-shaped dual planar EBG microstrip low-pass filter | |
| WO2019184270A1 (en) | Annular surface wave transmission line fed by coplanar waveguide | |
| Xue et al. | Printed holey plate Luneburg lens | |
| CN110739998B (en) | Mode division multiplexing circuit based on artificial surface plasmon | |
| CN110429383B (en) | Single-input-port SIW feeding structure and antenna array | |
| CN207381507U (en) | Capacitive coupling bandpass filter based on artificial surface plasma | |
| CN109494433B (en) | High-efficiency low-pass filter based on artificial surface plasmon and coplanar waveguide | |
| CN103647123B (en) | Half mode substrate integration waveguide horizontal symmetrical filter | |
| Abbosh et al. | An UWB planar out‐of‐phase power divider employing parallel stripline‐microstrip transitions | |
| CN113972454A (en) | Terahertz band-pass filter based on artificial surface plasmon and interdigital structure | |
| CN105305052A (en) | High rectangle factor trap UWB (ultra wide band) slot antenna based on differential step feed | |
| CN114284657B (en) | Ultra-compact low-pass filtering structure based on double-layer artificial surface plasmons | |
| CN205657172U (en) | Dielectric resonator filtering antenna | |
| Lerosey et al. | Hybridization band gap based smart antennas: Deep subwavelength yet directional and strongly decoupled MIMO antennas | |
| CN208173759U (en) | Broadband band-pass filter based on Equivalent Surface plasmon | |
| CN111009708B (en) | Band-pass filter based on equivalent local surface plasmon and working method thereof | |
| CN205159502U (en) | High rectangle degree trapped wave ultra wide band slot antenna of difference ladder feed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190416 Termination date: 20200328 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |