CN106450606A - Ultra-wideband limiting filter based on left-handed material - Google Patents
Ultra-wideband limiting filter based on left-handed material Download PDFInfo
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- CN106450606A CN106450606A CN201611191013.7A CN201611191013A CN106450606A CN 106450606 A CN106450606 A CN 106450606A CN 201611191013 A CN201611191013 A CN 201611191013A CN 106450606 A CN106450606 A CN 106450606A
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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
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Abstract
The invention relates to an ultra-wideband limiting filter based on the left-handed material, which relates to the technical field of communication. The ultra-wideband limiting filter is formed by different metal structures that are etched by a rectangular double-sided copper-plated microwave medium substrate. The metal structure comprises a metal slit structure etched on the front surface of the microwave dielectric substrate and a metal strip structure etched on the back surface of the dielectric substrate; the metal slit structure comprises an H-shaped metal strip structure and two rectangular metal plates, wherein the metal strip structure is elongated and H-shaped metal structure on the microwave medium substrate and comprises three metal arms arranged in parallel with each other, the metal arm IV, the metal arm V And the metal arm VI, and the metal arm VII in the vertical direction, the metal arm V is located between the metal arm IV and the metal arm VI and forms a cross-coupling structure with two rectangular metal plates on the front side, and the middle portions of the metal arm IV, the metal arm VI, and the metal arm VII are provided with grooves without metal cover. The ultra-wideband limiting filter has the advantages of compact structure and small size, and can meet the requirements of miniaturization of ultra-wideband wireless communication system well.
Description
Technical field
The present invention relates to communication technique field, particularly to a kind of ultra-wide band filter.
Background technology
Ultra broadband（UWB）Technology is a kind of new wireless communication technology.It pass through to have very steep raising and lowering when
Between impulse carry out directly modulation, make signal have the bandwidth of GHz magnitude.Ultra-wideband communication system does not adopt carrier wave, and
The non-sinusoidal waveform burst pulse transmission data using nanosecond to picosecond level, therefore, its shared spectral range very wide it is adaptable to
At a high speed, in-plant WPC.US Federal Communication Committee (FCC) specifies, the working frequency range scope of ultra broadband from
3.1GHz to 10.6GHz, minimum work bandwidth is 500MHz.Ultra broadband（UWB）Technology due to its technology character and superiority, at present
It is obtained for and is widely applied in military and commercial communication field, and there is wider application prospect.
Wave filter is a kind of two-port network with frequency selective characteristic, and its basic role is in circuit and electronic system
In so that the signal of different frequency is selectively passed through, to suppress unnecessary or harmful signal.In ultra-wideband communication system,
The effect of notch filter is the other system working signals effectively filtering out in 3.1GHz ~ 10.6GHz frequency band.Compact conformation,
Function admirable, the microwave filter of low cost, are the requirements of radio ultra wide band system miniaturization, are also technological progress and the market competition
Require.At present, in ultra-wideband communication system, traditional plane coupling filter, because oversized, more and more inadaptable
The demand of technological progress.
When electromagnetic wave is propagated in the material of naturally occurring, electric field E, magnetic field H and wave vector K are satisfied by right hand spiral shell
Rotation relation, so, the material that nature exists all is defined as right-handed material.Corresponding, if electromagnetic wave passes in certain material
Sowing time, its internal electric field E, magnetic field H and wave vector K meet left hand helix relation, then this material is just referred to as left hand material
Material.It is true that LHM does not directly exist in nature, can only be at present in the right-handed material of naturally occurring, lead to
Cross certain design, be allowed to the characteristic possessing LHM, such material is usually also directly referred to as LHM.By left hand
The concept of material is incorporated in the design of microwave filter, can overcome some restrictions in the design of traditional material wave filter（Example
As 1/2nd wavelength etc.）, the size of wave filter can be effectively reduced, improve the performance of wave filter.
Content of the invention
It is an object of the invention to provide a kind of ultra broadband notch filter based on LHM, its compact conformation, size
Less, the demand of super broad band radio communication system miniaturization can be met well.
The present invention employed technical scheme comprise that for achieving the above object：A kind of ultra broadband notch filtering based on LHM
Device, is gone out different metal structures and formed by the double-sided copper-clad microwave-medium base plate carving and corrosion of one piece of rectangle, and metal structure includes carving
Erosion in the metal slit structure of microwave-medium substrate front side and is etched in the bonding jumper structure at the medium substrate back side；Metal slit is tied
Structure includes I-shaped bonding jumper and two rectangular metal plate, and I-shaped bonding jumper includes being arranged on microwave-medium substrate lengthwise to phase
To both sides of the edge and the metal arm I that is parallel to each other and metal arm II, and it is vertically connected between metal arm I and metal arm II middle part
Metal arm III, two rectangular metal plate are located at metal arm III respectively and surround two hemi-closure spaces with metal arm I, metal arm II
In, and two rectangular metal plate are symmetricly set on the both sides of metal arm III；Bonding jumper structure be microwave-medium substrate lengthwise to
Bonding jumper structure in king's font, bonding jumper structure include three metal arms being parallel to each other IV, metal arm V, metal arm VI and
It is vertically connected on metal arm IV, metal arm V, the metal arm VII at metal arm VI middle part, metal arm V is located at metal arm IV, metal
Decussation coupled mode structure, metal arm IV, metal arm VI, metal is constituted between arm VI and with two rectangular metal plate in front
The middle part of arm VII also has one section of fluting that no metal level covers respectively.
The further technical scheme of the present invention is：The thickness of described microwave-medium substrate is 0.8 millimeter, and dielectric relatively is normal
Number εr=2.55, dielectric loss angle tangent tan δ=0.019.
The present invention is etched in the structure on medium substrate front metal layer, and the metallic plate of co-planar waveguide section can be used as system
The ground of system；It is etched in the structure on medium substrate metal layer on back, is a pair of high impedance sweep, be that the signal input of system is defeated
Outlet.Up and down two-layer composition decussation coupled mode structure, makes wave filter have left hand characteristic it is achieved that following beneficial effect：
（1）Compact conformation, size is less；（2）Electric property is further improved.
To the present invention, the ultra broadband notch filter based on LHM is made further with reference to the accompanying drawings and examples
Explanation.
Brief description
Fig. 1 is the positive structure schematic based on the ultra broadband notch filter of LHM for the present invention；
Fig. 2 is the structure schematic diagram based on the ultra broadband notch filter of LHM for the present invention；
Fig. 3 is return loss S based on the ultra broadband notch filter of LHM for the present invention11、Insertion loss curveS 21 Test
Result figure；
Fig. 4 is the standing-wave ratio based on the ultra broadband notch filter of LHM for the present invention（VSWR）Test result figure；
Drawing reference numeral explanation：1- metal arm I, 2- metal arm II, 3- metal arm III, 4- rectangular metal plate, 5- metal arm IV, 6- gold
Belong to arm V, 7- metal arm VI, 8- metal arm VII.
Specific embodiment
As shown in Figure 1 and Figure 2, the ultra broadband notch filter based on LHM for the present invention（Referred to as " wave filter "）, by one
The double-sided copper-clad microwave-medium base plate carving and corrosion of block rectangle goes out different metal structures and is formed.Microwave-medium substrate is a length ofL, a width ofW,The thickness of microwave-medium substrate is 0.8 millimeter, relative dielectric constant ε r=2.55, dielectric loss angle tangent tan δ=
0. 019.
Metal structure includes being etched in the metal slit structure of microwave-medium substrate front side and is etched in the medium substrate back side
Bonding jumper structure.Metal slit structure includes I-shaped bonding jumper and two rectangular metal plate 4, and I-shaped bonding jumper includes setting
Put in microwave-medium substrate lengthwise to opposite sides edge and the metal arm I 1 that is parallel to each other and metal arm II 2, and vertical connect
Metal arm III 3 between metal arm I 1 and metal arm II 2 middle part.Two rectangular metal plate 4 are located at metal arm III 3 and gold respectively
Belong to arm I 1, metal arm II 2 surrounds in two hemi-closure spaces, and two rectangular metal plate 4 are symmetricly set on the two of metal arm III 3
Side.Bonding jumper structure is to the bonding jumper structure in king's font in microwave-medium substrate lengthwise, and bonding jumper structure includes three phases
Mutually parallel metal arm IV 5, metal arm V 6, metal arm VI 7 and be vertically connected on metal arm IV 5, metal arm V 6, metal arm VI
The metal arm VII 8 at 7 middle parts, metal arm V 6 is located at two rectangular metal plate between metal arm IV 5, metal arm VI 7 and with front
4 composition decussation coupled mode structures, metal arm IV 5, metal arm VI 7, the middle part of metal arm VII 8 also have one section of no metal respectively
The fluting that layer covers.
Simulation result shows, this Structure Filter has good left hand characteristic, can effectively reduce the size of wave filter, change
Kind wave filter electric property.This filter passband scope is 3.16 ~ 6.9 GHz and 9.08 ~ 12.13 GHz, notch（Resistance
Band）Scope is 6.91 ~ 9.08 GHz.Obviously, this wave filter can be in ultra broadband（3.1 ~ 10.6GHZ）Work in working frequency range
Make, X-band can be prevented effectively from simultaneously（7.25 ~ 7.75 GHz, 7.9 ~ 8.4GHz）Signal produces electromagnetism to radio ultra wide band system
Interference.This design utilizes the phase compensation characteristic of LHM, and the half-wavelength breaching conventional filter design limits, effectively
Reduce the size of wave filter.The size optimizing postfilter is 7.2 mm × 15.8 mm × 0.8 mm, compact conformation, energy
Preferably meet the requirement of super broad band radio communication system miniaturization.
One group of geometric parameter of wave filter successful design of the present invention is as shown in Table 1 below.
Table 1：One group of geometric parameter of wave filter（Dimensional parameters unit is：Millimeter）.
| W | L | h 1 | h 2 | h 3 | h 4 | h 5 | d 1 |
| 15.8 | 7.2 | 0.87 | 0.87 | 1.26 | 3.2 | 6.4 | 0.6 |
| d 2 | d 3 | d 4 | d 5 | d 6 | d 7 | d 8 | d 9 |
| 1 | 7.4 | 7 | 0.5 | 1.4 | 3.2 | 6.5 | 0.3 |
Table 1 illustrates：Table 1 is to be for thicknessh=0.8 millimeter, relative dielectric constant εr=2.55, loss angle tangent
One group of filter size data that the microwave-medium substrate of tan δ=0.019 draws.For other thickness or different physical
Taconic TLX (tm) material, change, adjustment data above it is also possible to design corresponding ultra broadband notch filter.
Accompanying drawing 3 is the simulation result of wave filter return loss and insertion loss, emulation tool：ANSOFT company of U.S. business
With Frequency Simulation Software HFSS V.10.As seen from the figure, in 6.91 ~ 9.08 ghz bands, return loss S of wave filter11More than-
10 dB；Remaining is in 3.16 ~ 12.13 ghz bands, return loss S of wave filter11It is less than -10 dB.Obviously, the filter invented
Ripple device is in ultra broadband（3.1~10.6GHz）X-band signal can be effective filtered out on frequency range, it is to avoid X-band signal is to ultra broadband
The electromagnetic interference that system produces.
Accompanying drawing 4 is wave filter standing-wave ratio（VSWR）Simulation result, emulation tool：ANSOFT company of U.S. commercialization high frequency
Simulation software HFSS is V.10.As seen from the figure, in 3.16 ~ 12.13 ghz bands that ultra broadband is covered, at frequency range
In 6.91 ~ 9.08 ghz bands, wave filter standing-wave ratio is much larger than 2, shows that ultra-wide band filter has within this range good
Suppression signal function.
From the microwave-medium substrate of above-mentioned parameter, etch filter pattern by table 1 dimensional parameters on metal covering, and
By certain required precision lithography, that is, complete the making of ultra broadband notch filter of the present invention.During concrete application, can will filter
Device and the system integration are produced on same medium substrate.
Above example is only presently preferred embodiments of the present invention, and the structure of the present invention is not limited to what above-described embodiment was enumerated
Form, all any modifications made within the spirit and principles in the present invention, equivalent etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (2)
1. a kind of ultra broadband notch filter based on LHM, by the double-sided copper-clad microwave-medium base plate carving and corrosion of one piece of rectangle
Go out different metal structures and formed it is characterised in that metal structure includes being etched in the metal seam of microwave-medium substrate front side
Gap structure and the bonding jumper structure being etched in the medium substrate back side；Metal slit structure includes I-shaped bonding jumper and two rectangles
Metallic plate（4）, I-shaped bonding jumper includes being arranged on microwave-medium substrate lengthwise to opposite sides edge and the gold that is parallel to each other
Belong to arm I（1）With metal arm II（2）, and it is vertically connected on metal arm I（1）With metal arm II（2）Metal arm III between middle part
（3）, two rectangular metal plate（4）It is located at metal arm III respectively（3）With metal arm I（1）, metal arm II（2）Surround two and half envelopes
Close in space, and two rectangular metal plate（4）It is symmetricly set on metal arm III（3）Both sides；Bonding jumper structure is to be situated between in microwave
To the bonding jumper structure in king's font, bonding jumper structure includes three metal arms being parallel to each other IV to matter substrate lengthwise（5）, metal
Arm V（6）, metal arm VI（7）And it is vertically connected on metal arm IV（5）, metal arm V（6）, metal arm VI（7）The metal at middle part
Arm VII（8）, metal arm V（6）Positioned at metal arm IV（5）, metal arm VI（7）Between and two rectangular metal plate with front（4）
Constitute decussation coupled mode structure, metal arm IV（5）, metal arm VI（7）, metal arm VII（8）Middle part also have one section respectively
The fluting that no metal level covers.
2. the ultra broadband notch filter based on LHM as claimed in claim 1 is it is characterised in that described microwave-medium
The thickness of substrate is 0.8 millimeter, relative dielectric constant εr=2.55, dielectric loss angle tangent tan δ=0.019.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611191013.7A CN106450606A (en) | 2016-12-21 | 2016-12-21 | Ultra-wideband limiting filter based on left-handed material |
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|---|---|---|---|
| CN201611191013.7A CN106450606A (en) | 2016-12-21 | 2016-12-21 | Ultra-wideband limiting filter based on left-handed material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258294A (en) * | 2021-05-13 | 2021-08-13 | 齐齐哈尔大学 | Single-layer broadband amplitude coding super surface for full-space holographic imaging |
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| JP3978502B1 (en) * | 2006-06-22 | 2007-09-19 | 国立大学法人山口大学 | Strip line type left-handed line |
| CN103219963A (en) * | 2013-04-16 | 2013-07-24 | 南京理工大学 | Common mode filter based on C type coupling defected ground structure |
| CN204130669U (en) * | 2014-08-12 | 2015-01-28 | 南京邮电大学 | Based on the coplanar waveguide ultra wide band filter of interdigital coupling |
| CN204189931U (en) * | 2014-11-20 | 2015-03-04 | 天津大学 | Miniaturized dual-band band based on spiral defect ground structure leads to microwave filter |
| US9184481B2 (en) * | 2007-12-21 | 2015-11-10 | Hollinworth Fund, L.L.C. | Power combiners and dividers based on composite right and left handed metamaterial structures |
| CN206401477U (en) * | 2016-12-21 | 2017-08-11 | 广西科技大学鹿山学院 | A kind of ultra wide band notch filter based on LHM |
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2016
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Patent Citations (6)
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| JP3978502B1 (en) * | 2006-06-22 | 2007-09-19 | 国立大学法人山口大学 | Strip line type left-handed line |
| US9184481B2 (en) * | 2007-12-21 | 2015-11-10 | Hollinworth Fund, L.L.C. | Power combiners and dividers based on composite right and left handed metamaterial structures |
| CN103219963A (en) * | 2013-04-16 | 2013-07-24 | 南京理工大学 | Common mode filter based on C type coupling defected ground structure |
| CN204130669U (en) * | 2014-08-12 | 2015-01-28 | 南京邮电大学 | Based on the coplanar waveguide ultra wide band filter of interdigital coupling |
| CN204189931U (en) * | 2014-11-20 | 2015-03-04 | 天津大学 | Miniaturized dual-band band based on spiral defect ground structure leads to microwave filter |
| CN206401477U (en) * | 2016-12-21 | 2017-08-11 | 广西科技大学鹿山学院 | A kind of ultra wide band notch filter based on LHM |
Non-Patent Citations (2)
| Title |
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| J.Q.HUANG ET AL: "COMPACT UWB BAND-PASS FILTER UTILIZING MODIFIED COMPOSITE RIGHT/LEFT-HANDED STRUCTURE WITH CROSS COUPLING", 《PROGRESS IN ELECTROMAGNETICS RESEARCH》 * |
| 李顺利 等: "基于左手材料十字交叉耦合型UWB滤波器的设计", 《广西科技大学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258294A (en) * | 2021-05-13 | 2021-08-13 | 齐齐哈尔大学 | Single-layer broadband amplitude coding super surface for full-space holographic imaging |
| CN113258294B (en) * | 2021-05-13 | 2024-05-14 | 齐齐哈尔大学 | Single-layer broadband amplitude coding super-surface for full-space holographic imaging |
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Application publication date: 20170222 |