CN106374173A - Novel ultra wideband low pass filter with double notch - Google Patents
Novel ultra wideband low pass filter with double notch Download PDFInfo
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- CN106374173A CN106374173A CN201510446106.9A CN201510446106A CN106374173A CN 106374173 A CN106374173 A CN 106374173A CN 201510446106 A CN201510446106 A CN 201510446106A CN 106374173 A CN106374173 A CN 106374173A
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- waveguide
- spoof
- trapezoidal hole
- spps
- pass filter
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Abstract
The invention discloses an ultra wideband low pass filter with double notch, which belongs to a filter used in the microwave technology field and particularly relates to a planar structure and a spoof SPPs (Surface Plasmon Polarions) metamaterial. The ultra wideband low pass filter with double notch comprises a dielectric substrate (1), a coplanar waveguide feed tape (2a), coplanar waveguide grounding surfaces (2b), trapezoidal hole arrangements (3a), flaring surfaces (3b), a spoof SPPs waveguide tape (4a) and a ring resonator (4b), wherein the spoof SPPs waveguide tape is located in the middle of the surface of the dielectric substrate; the ring resonator is located right above the spoof SPPs waveguide and a gap is left between the two; two trapezoidal hole arrangements are located at the left end and the right end of the spoof SPPs respectively and are closely connected with the left end and the right end; four flaring surfaces are located at two sides of the left trapezoidal holes and the right trapezoidal holes and gaps are left; the coplanar waveguide feed tape is led to the trapezoidal hole arrangements from the edge of the dielectric substrate and is closely connected with the trapezoidal hole arrangements; and the two coplanar waveguide grounding surfaces are fixed at two sides of the coplanar waveguide feed tape respectively and gaps are left. The novel ultra wideband low pass filter with double notch has the advantages of simple structure, small size, convenient processing and low cost.
Description
Technical field
The invention belongs to the low pass filter that microwave technical field uses, particularly to planar structure and artificial surface plasma
Meta Materials.
Background technology
Surface plasma excimer (surface plasmon polarions, abbreviation spps), is in metal with medium (generally
It is air) the mixed activation state of a kind of electronics on interface and photon is to be constrained on metal and transmission in the environs of medium side
Surface wave.Because spps can break through the restriction of diffraction limit, it is possible to achieve the constraint to electromagnetic field time wavelength, therefore extensively
It is applied to the aspects such as biologic medical detection, NFM, photoelectron, solar photoelectric and nanophotonics.But
In microwave frequency band, metal shows as perfect electric conductor (pec), with medium interface on there is not spps, its plasma frequency one
As be present in visible ray and ultraviolet band.2004, professor pendry of Imperial College of Britain theoretically proposed people
The novel concept of work surface plasma (spoof spps).2005, hibbins et al. was on microwave frequency band with experiment card
Real spoof spps phenomenon.
Planar structure, such as co-planar waveguide, microstrip line, substrate integration wave-guide etc., have miniaturization, integrated, easy to process,
The advantages of be easy to compatible with other active circuit elements, is widely used at present.
Low pass filter, is mainly used in transmitting terminal prime or the rear class of receiving terminal, is used for filtering high-frequency signal, obtains preferable
Low frequency signal.Microwave low-pass filter plays an important role in terms of noise and spurious signal suppression, and nowadays, low pass filter is not
It is applied only for the communications field, and is widely used in rf and microwave product, such as radar, WLAN, microwave communications link,
Electronic circuit, microwave measurement circuit, wireless senser and control etc. become indispensable device in each electronic equipment, its property
The quality of whole system can be also contributed to.Traditional microwave low-pass filter is by Stepped Impedance structure and defect ground structure etc..
Compared to traditional microwave low-pass filter, the microwave low-pass filter based on spoof spps in the present invention, have high about
The advantages of bundle property and controllability.Low pass filter in the present invention also has two trap bands, and its mid frequency exists respectively
5.12ghz and 8.32ghz, it can be avoided that the interference to wireless wlan and satellite communication.
Content of the invention
The present invention devises a kind of Novel ultra wide band low pass filter with double traps.This low pass filter is based on planar structure
Spoof spps, it is 17.4ghz by frequency, has two trap bands, and its mid frequency is respectively 5.12ghz and 8.32ghz.
The wave filter of invention have simple and compact for structure, be easily integrated, adjustability is high, the restrictive good characteristic such as good, meets microwave
Device miniaturization, integrated requirement, can be widely applied in microwave system.
Technical solutions according to the invention are:
A kind of Novel ultra wide band low pass filter with double traps, is characterized in that: includes medium substrate, coplanar wave guide feedback band
Line, co-planar waveguide ground plane, enlarging face, trapezoidal hole arrangement, spoof spps waveguide belt and toroidal cavity resonator, described is coplanar
Waveguide feed band wire, co-planar waveguide ground plane, enlarging face, trapezoidal hole arrangement, spoof spps waveguide belt and toroidal cavity resonator print
Brush is located at the middle part of medium substrate in medium substrate upper surface, described spoof spps waveguide belt, and toroidal cavity resonator is located at spoof
Simultaneously there is a gap surface of spps waveguide with it, two trapezoidal hole arrangements be located at respectively spoof spps left and right two ends and and its
Closely linked, four enlarging faces are located at the both sides of two trapezoidal holes in left and right respectively and have gap with it, coplanar wave guide feedback band wire from
Medium substrate edge guide into trapezoidal hole arrangement and with its closely coupled connect, two panels co-planar waveguide ground plane is individually fixed in co-planar waveguide
Feed band wire both sides and have gap with it.
Beneficial effect of the present invention is:
1st, filter construction single-layer printed circuit plate technique of the present invention can achieve, simple and compact for structure, compact,
Easy to process, low cost.
2nd, ring resonator structure of the present invention, adjusts two trap frequencies by adjusting resonator dimensions, realizes ultra broadband
Communicate and suddenly disturb the compatible communication for coordination of communication system.
3rd, the wave filter designed by the present invention adopts co-planar waveguide, is printed on medium substrate the same face, is conducive to integrated.
4th, the wave filter designed by the present invention, low production cost, is easy to produce in batches.
Brief description
Fig. 1 is the top view of low pass filter of the present invention；
Fig. 2 is the schematic diagram in single rectangle cycle hole；
The schematic diagram that Fig. 3 arranges for trapezoidal hole；
Fig. 4 is the schematic diagram of toroidal cavity resonator；
Fig. 5 is the s Parameter Map of low pass filter of the present invention.
Contain in above picture:
1: medium substrate；2: coupling unit；2a: coplanar wave guide feedback band wire；2b: co-planar waveguide ground plane；3: transition list
Unit；3a: trapezoidal hole；3b: enlarging face；4: filter unit；4a:spoof spps waveguide belt；4b: toroidal cavity resonator.
Specific embodiment
Technological means, creation characteristic, reached purpose and effect for making the present invention realize are easy to understand, with reference to concrete
Embodiment, is further elucidated with the present invention.
It is embodied as:
As shown in Figure 1: a kind of ultra wide band bandpass filter with double traps, its composition includes: medium substrate, co-planar waveguide
Feed band wire, co-planar waveguide ground plane, enlarging face, trapezoidal hole arrangement, spoof spps waveguide belt and toroidal cavity resonator, described
Coplanar wave guide feedback band wire, co-planar waveguide ground plane, enlarging face, trapezoidal hole arrangement, spoof spps waveguide belt and annular humorous
The device that shakes is printed on medium substrate upper surface, and described spoof spps waveguide belt is located at the middle part of medium substrate, toroidal cavity resonator position
In the surface of spoof spps waveguide and there is a gap with it, two trapezoidal holes arrangements are located at the left and right two of spoof spps respectively
End is simultaneously closely linked with it, and four enlarging faces are located at the both sides of two trapezoidal holes in left and right respectively and have gap with it, two coplanar ripples
Lead feed band wire from medium substrate both sides of the edge guide into respectively trapezoidal hole arrangement and with its closely coupled connect, four co-planar waveguides ground connection
Face is individually fixed in two coplanar wave guide feedback band wire both sides and has gap with it.
Described medium substrate is Rogers's material, and thickness is 0.76mm, and relative dielectric constant for 3.3,10ghz loss angle is
0.03.
Described coplanar wave guide feedback band wire characteristic impedance 50ohm, line length 10mm, live width 6mm.
Described co-planar waveguide ground plane is made up of four rectangular configuration, its a length of 10mm, its a width of 15mm.
The gap of described coplanar wave guide feedback band wire and co-planar waveguide ground plane is 0.5mm.
The curve in described enlarging face is described as y=c1eαx+c2(x1＜ x2), wherein α=0.2, (x1, the y1) in four enlarging faces, (x2, y2) is respectively (10,3.5), (70,18.5)；
(10, -3.5), (70, -18.5)；(130,18.5), (190,3.5)；(130, -18.5), (190, -3.5).
Described spoof spps waveguide belt is rearranged by 20 cycle holes, its period p=5mm, width a=2mm, depth
H=4.8mm.Single rectangle cycle hole, as shown in Figure 2.
Period p=the 5mm of described trapezoidal hole arrangement, width a=2mm, depth h1=0.6mm, h2=1.2mm, h3=1.8mm,
H4=2.4mm, h5=3.0mm, h6=3.6mm, h7=4.2mm, h8=4.8mm.Trapezoidal hole arranges, as shown in Figure 3.
Described toroidal cavity resonator is to carve the hole in 8 cycles in an annulus to be arranged to make up, and the outer radius of wherein annulus is
10mm, inside radius is 4mm, the period p=5mm of hole arrangement, width a=2mm, depth h=4.8mm.Toroidal cavity resonator, such as schemes
Shown in 4.
Described spoof spps waveguide belt is 0.2mm with the gap of toroidal cavity resonator.
Fig. 5 is the s parametric plot of invention Novel Filter, as shown in Fig. 2 wave filter is respectively in 5.12ghz and 8.32 product
Raw two trap wave points, thus avoid the interference to wlan wave band and Satellite Communication System.
Claims (6)
1. a kind of ultra wide band bandpass filter with double traps, its composition includes: medium substrate, coplanar wave guide feedback band wire, co-planar waveguide connect
Ground, enlarging face, trapezoidal hole arrangement, spoof spps waveguide belt and toroidal cavity resonator, described coplanar wave guide feedback band wire, co-planar waveguide are grounded
Face, enlarging face, trapezoidal hole arrangement, spoof spps waveguide belt and toroidal cavity resonator are printed on medium substrate upper surface, described spoof spps ripple
Conduction band is located at the middle part of medium substrate, and toroidal cavity resonator is located at the surface of spoof spps waveguide and has gap with it, and two trapezoidal hole arrangements are respectively
Positioned at the left and right two ends of spoof spps and closely linked with it, four enlarging faces are located at the both sides of two trapezoidal holes in left and right respectively and have gap with it,
Article two, coplanar wave guide feedback band wire from medium substrate both sides of the edge guide into respectively trapezoidal hole arrangement and with its closely coupled connect, four co-planar waveguide ground planes
It is individually fixed in two coplanar wave guide feedback band wire both sides and have gap with it.
2. co-planar waveguide ground plane according to claim 1 is made up of four rectangular configuration.
3. enlarging face according to claim 1 is made up of four arcuate structures.
4. spoof spps waveguide belt according to claim 1, is that the rectangular opening etching 20 cycles in waveguide belt is arranged to make up.
5. trapezoidal hole arrangement according to claim 1, is to etch 8 depth h in waveguide belt to become the rectangular opening of arithmetic progression to be arranged to make up.
6. toroidal cavity resonator according to claim 1, is to etch the rectangular opening in 8 cycles in an annulus to be arranged to make up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510446106.9A CN106374173A (en) | 2015-07-20 | 2015-07-20 | Novel ultra wideband low pass filter with double notch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510446106.9A CN106374173A (en) | 2015-07-20 | 2015-07-20 | Novel ultra wideband low pass filter with double notch |
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| CN106374173A true CN106374173A (en) | 2017-02-01 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336500A (en) * | 2018-02-07 | 2018-07-27 | 南京邮电大学 | Leaky-wave antenna is penetrated in simple beam binary cycle surface phasmon side |
| CN110323524A (en) * | 2019-05-09 | 2019-10-11 | 中国计量大学 | A kind of Novel ultra wide band low-pass filter with double traps |
| CN110361798A (en) * | 2018-03-26 | 2019-10-22 | 桂林电子科技大学 | One kind being based on surface plasmon waveguide bandstop filter |
| CN110364793A (en) * | 2019-06-13 | 2019-10-22 | 中国人民解放军国防科技大学 | Hybrid SIW and SLSP structure broadband cavity filter |
| CN112886168A (en) * | 2021-01-11 | 2021-06-01 | 中国人民解放军国防科技大学 | Mode division multiplexing transmission line based on substrate integrated waveguide and artificial surface plasmon |
-
2015
- 2015-07-20 CN CN201510446106.9A patent/CN106374173A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336500A (en) * | 2018-02-07 | 2018-07-27 | 南京邮电大学 | Leaky-wave antenna is penetrated in simple beam binary cycle surface phasmon side |
| CN108336500B (en) * | 2018-02-07 | 2020-05-26 | 南京邮电大学 | Single-beam double-period surface plasmon side-emitting leaky-wave antenna |
| CN110361798A (en) * | 2018-03-26 | 2019-10-22 | 桂林电子科技大学 | One kind being based on surface plasmon waveguide bandstop filter |
| CN110323524A (en) * | 2019-05-09 | 2019-10-11 | 中国计量大学 | A kind of Novel ultra wide band low-pass filter with double traps |
| CN110364793A (en) * | 2019-06-13 | 2019-10-22 | 中国人民解放军国防科技大学 | Hybrid SIW and SLSP structure broadband cavity filter |
| CN112886168A (en) * | 2021-01-11 | 2021-06-01 | 中国人民解放军国防科技大学 | Mode division multiplexing transmission line based on substrate integrated waveguide and artificial surface plasmon |
| CN112886168B (en) * | 2021-01-11 | 2021-11-19 | 中国人民解放军国防科技大学 | Mode division multiplexing transmission line based on substrate integrated waveguide and artificial surface plasmon |
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Application publication date: 20170201 |