CN108183294A - Broadband dual-mode bandpass filter based on line of rabbet joint resonator - Google Patents
Broadband dual-mode bandpass filter based on line of rabbet joint resonator Download PDFInfo
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- CN108183294A CN108183294A CN201711358837.3A CN201711358837A CN108183294A CN 108183294 A CN108183294 A CN 108183294A CN 201711358837 A CN201711358837 A CN 201711358837A CN 108183294 A CN108183294 A CN 108183294A
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- line
- rabbet joint
- resonator
- transmission lines
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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 discloses a kind of broadband dual-mode bandpass filter based on line of rabbet joint resonator, the metal layer including medium substrate and positioned at medium substrate upper strata；Metal layer includes rectangular ring resonator and two input/output end ports, and rectangular ring resonator is the line of rabbet joint etched on metal layer, and rectangular ring resonator central is overlapped with metal layer center；Two input/output end ports are separately positioned on the point midway on the adjacent both sides of rectangular channel wire loop resonator using CPW orthogonal feed modes.The CPW orthogonal feed modes of the present invention generate two transmission poles in passband, and a transmission zero is respectively generated at low cutoff frequency, higher cutoff frequency, effectively raise the passband selection performance of wave filter；Broadband filter design is simple, and compact-sized, easy to process and band-pass behavior is steady, and passband is selectively preferable.
Description
Technical field
The present invention relates to broadband filter technologies, and in particular to a kind of broadband dual-mode bandpass filtering based on line of rabbet joint resonator
Device.
Background technology
With the high speed development that modern communication technology and microwave radio are applied, people are more next to the expectation of wireless telecom equipment
It is higher：It is required that it further improves integrated level while communication system performance is ensured, reduces cost.Microwave transmission line is to realize
The basis of microwave device, its size and performance directly affect the size and performance of component.Traditional microwave transmission line master
To include coaxial line, waveguide and strip line, wherein being the strip line of representative since its is simple in structure, is easily integrated using microstrip line
Feature becomes mainstream transmission line.But by development for many years, the potentiality of device have further been promoted using microstrip line increasingly
It is small.Different from conventional micro strip line, the line of rabbet joint is a kind of line of rabbet joint for etching and on the metal layer on dielectric-slab upper strata, is that one kind can be put down
The transmission line that face integrates；Compare microstrip line, and the line of rabbet joint has the following advantages：
(1) on the same substrate, compared to more traditional strip lines configuration, the line of rabbet joint is easier to add under identical characteristic impedance
Work.
(2) metal covering that can be integrated in structure, has good integration.
(3) slot line structure of formation is etched on metal ground plate, electricity is effectively improved while planar dimension is not increased
Road performance.
The line of rabbet joint is more and more noticeable as electrical property coplanar and special possessed by a kind of monoplane transmission structure.
Plane slot line structure not only have the characteristics that be not required to punch it is easily fabricated, also have lower radiation and resistance loss.Therefore base
Mini strip line resonator is compared in the line of rabbet joint resonator of this plane slot line structure design, higher quality is possessed under identical size
Factor.Line of rabbet joint self structure is similar with CPW transmission lines, is also easy to be connected to form feed structure with CPW transmission lines.
City University of Hong Kong Zhang Xiuyin professors are in paper within 2008《Uniplanar Bandpass Filter Using
Slotline Resonators and CPW Feeding Lines》It is middle to propose a kind of wave filter based on line of rabbet joint resonator, packet
Containing two coupling open loop line of rabbet joint resonators, and resonator is fed using two CPW transmission lines, which passes through two
Coupling is realized in open loop, but final realization effect bandwidth is not wide enough, and structure is relative complex.
Invention content
It is an object of the invention to overcome shortcoming and deficiency of the prior art, a kind of width based on line of rabbet joint resonator is provided
Band bimodule band-pass filter.
Realize the object of the invention technical solution be：A kind of broadband dual-mode bandpass filter based on line of rabbet joint resonator, packet
Include medium substrate and the metal layer positioned at medium substrate upper strata；
The metal layer includes rectangular ring resonator and two input/output end ports, and rectangular ring resonator is metal
The line of rabbet joint etched on layer, rectangular ring resonator central are overlapped with metal layer center；Two input/output end ports are respectively first
Input/output end port and the second input/output end port, as input port, another is output port for one of them；
First input/output end port, the second input/output end port are separately positioned on using CPW orthogonal feed modes
The point midway on the adjacent both sides of rectangular channel wire loop resonator.
Compared with prior art, the invention has the advantages that：(1) present invention is by the metal layer on dielectric-slab upper strata
It etches the rectangle line of rabbet joint and the point midway on the adjacent both sides of rectangular channel wire loop resonator uses CPW orthogonal feed modes, design one
The broadband filter that money band-pass behavior is steady, passband is selectively good, simple in structure, the broadband filter is especially suitable for the world
In the system of broadband wireless communication of high standard；(2) present invention is made using CPW orthogonal feed rectangular channel wire loop resonator structures
The present invention has wider bandwidth, can reach 22.5% relative bandwidth, and absolute bandwidth has reached 684MHz (@3.0GHz)；
(3) the CPW transmission line orthogonal feed mode that the present invention uses can respectively generate a transmission zero in the upper and lower both sides of passband,
Improve the selection performance of passband；(4) broadband filter in the present invention takes full advantage of the space of the line of rabbet joint on metallic plate, effectively
Ground reduces the volume of device, and topological structure is simple, and circuit model is compact, and space availability ratio is high.
Description of the drawings
Fig. 1 is the structure diagram of broadband dual-mode bandpass filter of the present invention.
Fig. 2 is the upper strata metal structure schematic diagram of broadband dual-mode bandpass filter of the present invention.
Fig. 3 is the frequency response schematic diagram of broadband dual-mode bandpass filter of the present invention.
Specific embodiment
The structure diagram of the broadband dual-mode bandpass filter of the present invention is as shown in Figure 1, the broadband dual-mode bandpass filter
Pass-band performance is steady, passband is selectively good, and the broadband filter is by medium substrate, the metal layer group positioned at dielectric-slab upper strata
Into.
With reference to Fig. 2, the metal layer 4 includes rectangular ring resonator and input/output end port, and rectangular ring resonator is
The rectangular ring line of rabbet joint etched on metal layer, rectangular ring resonator central are overlapped with metal layer center；Input/output end port has
Two, respectively the first input/output end port and the second input/output end port, as input port, another is for one of them
Output port；
First input/output end port, the second input/output end port are separately positioned on using CPW orthogonal feed modes
The point midway on the adjacent both sides of rectangular channel wire loop resonator.
Rectangular channel wire loop resonator is divided into first line of rabbet joint 3 by the first input/output end port, the second input/output end port
With second line of rabbet joint 5；
First input/output end port includes the first CPW transmission lines 1, and the second input/output end port is transmitted including the 2nd CPW
Line 2；First CPW transmission lines 1 and 2 position of the 2nd CPW transmission lines are orthogonal, and outside the first CPW transmission lines 1 and the 2nd CPW transmission lines 2
Week is etched with the third line of rabbet joint and the 4th line of rabbet joint respectively；The one end of the third line of rabbet joint respectively with first line of rabbet joint 3 and second line of rabbet joint 5 connects,
The other end of 4th line of rabbet joint respectively with first line of rabbet joint 3 and second line of rabbet joint 5 connects.
It using the horizontal right direction of the center origin of metal layer as 0 °, rotates counterclockwise, at the first CPW transmission lines 1
In 180 ° of directions, the 2nd CPW transmission lines 2 are in 270 ° of directions, the first CPW transmission lines 1 and the 2nd CPW transmission lines 2 insertion rectangle
In line of rabbet joint ring resonator；
The depth of first CPW transmission lines 1 and the 2nd CPW transmission lines 2 insertion rectangular channel wire loop resonator line of rabbet joint accounts for straight-flanked ring
/ to three/6ths of the shape resonator length of side.
First CPW transmission lines 1 are identical with the length of the 2nd CPW transmission lines 2, of same size, are not in contact with each other.
The width of the line of rabbet joint of first line of rabbet joint~the 4th is 0.3~0.5mm.
The present invention is described in further detail with reference to the accompanying drawings and examples.
Embodiment
The structure of broadband dual-mode bandpass filter of the present embodiment based on line of rabbet joint resonator is as shown in Figure 1, interlayer
Plate is Rogers RT/droid 6010/6010LM (tm), and thickness 0.635mm, relative dielectric constant 10.2, loss angle is just
It is cut to 0.0023.Using the 3D electromagnetic simulation softwares HFSS based on FInite Element to proposed by the present invention based on line of rabbet joint resonator
The structure of broadband dual-mode bandpass filter optimizes emulation, the line of rabbet joint and CPW transmission lines on the wave filter metallic plate finally obtained
Dimensional parameters it is as follows：The length and width of rectangular dielectric plate is equal to 30mm；Rectangle is carved in the upper metal layers 4 of dielectric-slab
Line of rabbet joint ring resonator width W2=0.4mm；First CPW transmission lines 1,2 width of the 2nd CPW transmission lines are W1=1.2mm；First
CPW transmission lines 1,2 length of the 2nd CPW transmission lines are L3=12.8mm；The length of first line of rabbet joint 3 be L1=29.8mm, second
The length of the line of rabbet joint 5 is L2=8.6mm；It is L4=3.5mm that two CPW transmission lines, which are inserted into rectangular ring line of rabbet joint depth,；It reasonably selects
The width and CPW transmission lines insertion depth of the line of rabbet joint obtains optimal transmitted in band characteristic, band selective.
Fig. 3 is the emulation knot of the broadband dual-mode bandpass filter bandwidth S parameter based on line of rabbet joint resonator in the present embodiment
Fruit curve graph.From figure 3, it can be seen that the present invention broadband dual-mode bandpass filter, working band be 1GHz~5GHz, center
Working frequency is located at 3.14GHz, and absolute bandwidth of operation is 684MHz, and 3dB relative bandwidths are 22.5%, the insertion damage in passband
Consumption is maintained within 0.5dB, and return loss is maintained at below -10dB.At the upside 2.57GHz of passband and downside 4.32GHz
Transmission zero there are one each, so the low cut-off edge attenuation slope of passband is 264.5dB/GHz, height cut-off edge attenuation slope
For 54.8dB/GHz, there is good passband to select performance.
The present invention is while realization meets broadband wireless communications band requirement, compared to more existing based on line of rabbet joint resonator
Broadband band-pass filter has broader bandwidth of operation, smaller insertion loss, more preferable band-pass behavior and the choosing of higher passband
Selecting property.
Claims (6)
1. a kind of broadband dual-mode bandpass filter based on line of rabbet joint resonator, which is characterized in that including medium substrate and positioned at Jie
The metal layer on matter substrate upper strata；
The metal layer includes rectangular ring resonator and two input/output end ports, and rectangular ring resonator is on metal layer
The line of rabbet joint of etching, rectangular ring resonator central are overlapped with metal layer center；Two input/output end ports are respectively first defeated
Enter/output port and the second input/output end port, as input port, another is output port for one of them；
First input/output end port, the second input/output end port are separately positioned on rectangle using CPW orthogonal feed modes
The point midway on the adjacent both sides of line of rabbet joint ring resonator.
2. the broadband dual-mode bandpass filter according to claim 1 based on line of rabbet joint resonator, which is characterized in that first is defeated
Enter/rectangular ring resonator is divided into first line of rabbet joint (3) and second line of rabbet joint (5) by output port, the second input/output end port；
First input/output end port includes the first CPW transmission lines (1), and the second input/output end port includes the 2nd CPW transmission lines
(2)；First CPW transmission lines (1) and the 2nd CPW transmission lines (2) position are orthogonal, and the first CPW transmission lines (1) and the 2nd CPW are passed
Defeated line (2) periphery is etched with the third line of rabbet joint and the 4th line of rabbet joint respectively；The third line of rabbet joint respectively with first line of rabbet joint (3) and second line of rabbet joint
(5) one end connection, the other end of the 4th line of rabbet joint respectively with first line of rabbet joint (3) and second line of rabbet joint (5) connect.
3. the broadband dual-mode bandpass filter according to claim 2 based on line of rabbet joint resonator, which is characterized in that first
In one end of CPW transmission lines (1) and the 2nd CPW transmission lines (2) insertion rectangular channel wire loop resonator, embedded depth accounts for straight-flanked ring
/ to three/6ths of the shape resonator length of side.
4. the broadband dual-mode bandpass filter according to claim 3 based on line of rabbet joint resonator, which is characterized in that first
CPW transmission lines (1) are identical and of same size with the length of the 2nd CPW transmission lines (2).
5. the broadband dual-mode bandpass filter according to claim 4 based on line of rabbet joint resonator, which is characterized in that first
CPW transmission lines (1) and the 2nd CPW transmission lines (2) are not in contact with each other.
6. the broadband dual-mode bandpass filter based on line of rabbet joint resonator according to claim 2-5 any one, feature
It is, the width of the line of rabbet joint of first line of rabbet joint~the 4th is 0.3~0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711358837.3A CN108183294A (en) | 2017-12-17 | 2017-12-17 | Broadband dual-mode bandpass filter based on line of rabbet joint resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711358837.3A CN108183294A (en) | 2017-12-17 | 2017-12-17 | Broadband dual-mode bandpass filter based on line of rabbet joint resonator |
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| CN108183294A true CN108183294A (en) | 2018-06-19 |
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| CN201711358837.3A Pending CN108183294A (en) | 2017-12-17 | 2017-12-17 | Broadband dual-mode bandpass filter based on line of rabbet joint resonator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354652A (en) * | 2021-12-22 | 2022-04-15 | 杭州电子科技大学 | High-sensitivity microwave micro-fluidic sensor based on load opening resonant ring |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694898A (en) * | 2009-10-16 | 2010-04-14 | 南京邮电大学 | Bimodule annular resonant cavity band-pass filter with direct feed planar structure |
| CN101950826A (en) * | 2010-09-01 | 2011-01-19 | 华东交通大学 | Square annular defected ground structure microwave dual-mode band-pass filter |
| CN102394328A (en) * | 2011-07-19 | 2012-03-28 | 西安电子科技大学 | Microstrip bimodule band-pass filter based on DGS (defected ground structure) square-ring resonator |
-
2017
- 2017-12-17 CN CN201711358837.3A patent/CN108183294A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694898A (en) * | 2009-10-16 | 2010-04-14 | 南京邮电大学 | Bimodule annular resonant cavity band-pass filter with direct feed planar structure |
| CN101950826A (en) * | 2010-09-01 | 2011-01-19 | 华东交通大学 | Square annular defected ground structure microwave dual-mode band-pass filter |
| CN102394328A (en) * | 2011-07-19 | 2012-03-28 | 西安电子科技大学 | Microstrip bimodule band-pass filter based on DGS (defected ground structure) square-ring resonator |
Non-Patent Citations (3)
| Title |
|---|
| HAIWEN LIU ET AL: ""a miniaturized dual-mode bandpass filter using slot spurline technique"", 《INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION》 * |
| XIUYIN ZHANG ET AL: ""uniplanar bandpass filter using slotline resonators and CPW feeding lines"", 《2008 GLOBAL SYMPOSIUM ON MILLIMETER WAVES》 * |
| 谢翔宇: ""多模滤波器技术研究与应用"", 《中国优秀硕士学位论文全文数据库信息科技辑）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354652A (en) * | 2021-12-22 | 2022-04-15 | 杭州电子科技大学 | High-sensitivity microwave micro-fluidic sensor based on load opening resonant ring |
| CN114354652B (en) * | 2021-12-22 | 2023-08-01 | 杭州电子科技大学 | High-sensitivity microwave microfluidic sensor based on load split resonant ring |
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Application publication date: 20180619 |