CN110137641A - A kind of miniature double trap ultra-wide band filters based on the type of falling π resonator - Google Patents
A kind of miniature double trap ultra-wide band filters based on the type of falling π resonator Download PDFInfo
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- CN110137641A CN110137641A CN201910523717.7A CN201910523717A CN110137641A CN 110137641 A CN110137641 A CN 110137641A CN 201910523717 A CN201910523717 A CN 201910523717A CN 110137641 A CN110137641 A CN 110137641A
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- microstrip line
- minor matters
- resonator
- falling
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- 239000000758 substrate Substances 0.000 claims abstract description 21
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 claims abstract description 10
- 230000037431 insertion Effects 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002146 bilateral effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
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
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20354—Non-comb or non-interdigital filters
- H01P1/20381—Special shape resonators
Abstract
The invention discloses a kind of miniature double trap ultra-wide band filters based on the type of falling π resonator, the wide minor matters microstrip line above minor matters microstrip line of opening a way of open circuit minor matters microstrip line and load of half-wavelength short circuit minor matters microstrip line, load including medium substrate, at medium substrate center in half-wavelength short circuit minor matters microstrip line two sides；Linear type insertion coupled microstrip line is formed between open circuit minor matters microstrip line and wide minor matters microstrip line；The type of falling π resonator is coupled with above half-wavelength short circuit minor matters microstrip line.The present invention by using the Stepped Impedance bypass coupling type of falling π resonator structure, not only it is able to achieve double traps, the centre frequency of trap can also be changed by adjusting open circuit minor matters size, entirely logical in-band insertion loss is lower, generates two transmission zeros in high band, good band external characteristics is effectively guaranteed, filter notch depth is sufficiently large, and meets the requirement of narrowband trap, and the filter trap is adjustable, it is compact-sized, it is easy to and other circuit integrations.
Description
Technical field
The invention belongs to the technical field of microwave communication more particularly to a kind of miniature double traps based on the type of falling π resonator
Ultra-wide band filter.
Background technique
2002, the frequency range of Federal Communications Commission authorization 3.1-10.6GHz can be used for business correspondence.This is at one stroke
It arranges and has started research boom to Ultra-Wide Band Radio in the world rapidly.The application field of super-broadband tech is very
Wide, be divided into five major class according to use direction difference: the Fast Practical of electronic equipment may be implemented in family and working environment；Army
Thing field super-broadband tech has good signal hiding function；There is imaging super-broadband tech good barrier to penetrate energy
Power；It can be used for sensor network using ultra wide band low-power consumption, the specific of low cost；Intelligent transportation field super-broadband tech can be with
Fast search and accurate positionin are carried out to target.
Since the ultra wideband frequency range of FCC defined contains some narrowbands occupied in present age wireless communication
Frequency range, for example, 5.8GHz WLAN and 8GHz satellite communication signals, these wireless signals can produce radio ultra wide band system
Raw severe jamming.Therefore the communication system to work in the ultra wideband frequency has to the narrowband for generating corresponding band in the pass-band
Trap, in order to avoid influenced by the radio signals such as WLAN and X-band satellite communication.
The ultra-wide band filter of the prior art has defect what follows: (1) using low in medium substrate etching defect
Structure forms trap, which not can guarantee flat characteristic in ultra wide band passband；(2) trap relative bandwidth is excessive, has filtered out portion
Divide useful information；(3) notch depth is insufficient, can not complete filtering interference signals；(4) Out-of-band rejection effect is bad, and filter is defeated
Outlet mixing phenomenon is serious.
Summary of the invention
Based on the above the deficiencies in the prior art, technical problem solved by the invention be to provide it is a kind of it is compact-sized, at
This cheap miniature double trap ultra-wide band filter based on the type of falling π resonator, the filter can mask 5.76-
6.14GHz and 7.82-8.45GHz frequency range eliminates the interference of WLAN and satellite communication signals to logical inband signaling.
In order to solve the above-mentioned technical problem, the present invention is achieved through the following technical solutions: the present invention provides one kind and is based on
Miniature double trap ultra-wide band filters of the type of falling π resonator, including medium substrate, the half-wave at the medium substrate center
Long short circuit minor matters microstrip line, load are in the open circuit minor matters microstrip line of half-wavelength short circuit minor matters microstrip line two sides and load in institute
State the wide minor matters microstrip line above open circuit minor matters microstrip line；
Linear type insertion coupled microstrip line is formed between the open circuit minor matters microstrip line and wide minor matters microstrip line；
Linear type insertion coupled microstrip line bottom is equipped with the input terminal feeder line for being located at medium substrate two sides and defeated
Outlet feeder line；
The type of falling π resonator is coupled with above the half-wavelength short circuit minor matters microstrip line.
Embodiment as a preferred embodiment of the above technical solution, it is provided in an embodiment of the present invention based on the micro- of the type of falling π resonator
The double trap ultra-wide band filters of type further comprise some or all of following technical characteristic:
As an improvement of the above technical solution, in one embodiment of the invention, the linear type is inserted into coupling microstrip
Line is equal with upper and lower wide minor matters microstrip line and the open circuit coupling distance of minor matters microstrip line.
In one embodiment of the invention, the lower surface of the medium substrate is formed with metal ground plate, the medium
The copper plate of upper surface of base plate has filter circuit configuration.
In addition, in specific embodiments of the present invention mode, the input terminal feeder line, half-wavelength short circuit minor matters microstrip line,
Minor matters microstrip line, the linear type of opening a way are inserted into coupled microstrip line, the type of falling π resonator, wide minor matters microstrip line and output end feeder line and are constituted
The filter circuit configuration.
Optionally, the open circuit minor matters microstrip line is loaded respectively in the lower section of half-wavelength short circuit minor matters microstrip line two sides.
In one embodiment of the invention, the relative dielectric constant of the medium substrate is 10.2, with a thickness of 1.27mm；
The copper plate with a thickness of 35um.
Optionally, the wide minor matters microstrip line load forms Stepped Impedance resonance in the top of the open circuit minor matters microstrip line
Device.
By upper, the present invention relates to a kind of small wide-frequency filter with double trap characteristics, which can be effective
Inhibit the WLAN WLAN signal and satellite communication signals in passband, it is humorous by using the Stepped Impedance bypass coupling type of falling π
The structure of vibration device is not only able to achieve double traps, can also change the centre frequency of trap by adjusting open circuit minor matters size；
Select the medium substrate of high dielectric constant can be with the size of strict control circuit design, entirely logical in-band insertion loss is lower,
High band generates two transmission zeros, and good band external characteristics is effectively guaranteed, and filter notch depth is sufficiently large, and meets
The requirement of narrowband trap.Meanwhile the filter integrally stores smaller, trap is adjustable, compact-sized, easy to process, be easy to and its
His circuit integration.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, below in conjunction with preferred embodiment, and cooperates attached drawing, detailed description are as follows.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, the attached drawing to embodiment is simply situated between below
It continues.
Fig. 1 is the top view of miniature double trap ultra-wide band filters of the invention based on the type of falling π resonator；
Fig. 2 is the main view of miniature double trap ultra-wide band filters of the invention based on the type of falling π resonator；
Fig. 3 is the emulation schematic diagram of miniature double trap ultra-wide band filters of the invention based on the type of falling π resonator.
Specific embodiment
The embodiment of the invention will now be described in detail with reference to the accompanying drawings, and as part of this specification passes through
Embodiment illustrates the principle of the present invention, and other aspects of the present invention, feature and its advantage will become by the detailed description
It is very clear.In the attached drawing of institute's reference, the same or similar component is indicated using identical drawing reference numeral in different figures.
As shown in Figs. 1-2, miniature double trap ultra-wide band filters of the invention based on the type of falling π resonator include medium base
Plate 9, the metal ground plate 10 positioned at 9 lower surface of medium substrate and the filter circuit positioned at 9 upper surface copper plate of medium substrate
Structure 8.Filter circuit configuration 8 include input terminal feeder line 1, half-wavelength short circuit minor matters microstrip line 2, open a way minor matters microstrip line 3, directly
Line style is inserted into coupled microstrip line 4, the type of falling π resonator 5, wide minor matters microstrip line 6 and output end feeder line 7.
Microstrip line construction integrated symmetric positioned at 9 upper layer of medium substrate, input terminal feeder line 1, output end feeder line 7 are distinguished
Positioned at the bilateral of medium substrate 9.The half-wavelength short circuit minor matters microstrip line 2 is located at the center of medium substrate 9, and minor matters of opening a way
Microstrip line 3 loads the lower section of 2 two sides of half-wavelength short circuit minor matters microstrip line respectively, can be by adjusting open circuit minor matters microstrip line 3
Length and width adjusts notch location, and the structure size by adjusting open circuit minor matters microstrip line 3 can produce 3.1-11.9GHz
Ultra wide band.The load of wide minor matters microstrip line 6 forms step impedance resonator in the top of open circuit 3 two sides of minor matters microstrip line, can be with
Notch location is adjusted by adjusting wide 6 length and width of minor matters microstrip line.
Linear type insertion coupled microstrip line 4 of the invention loads on input terminal feeder line 1 and output end feeder line 7, and directly
It is inserted between open circuit minor matters microstrip line 3 and wide minor matters microstrip line 6 and forms interdigital coupling, and linear type is inserted into coupled microstrip line
4 is equal with upper and lower two microstrip lines (wide minor matters microstrip line 6 and open circuit minor matters microstrip line 3) coupling distance.
The type of falling π resonator 5 of the invention is coupled in the top of half-wavelength short circuit minor matters microstrip line 2, by Stepped Impedance
Road couples the type of falling π resonator to generate trap characteristic, by the open circuit minor matters for adjusting wide minor matters microstrip line 6 and the type of falling π resonator 5
Size realizes that double traps are adjustable.
Further, the relative dielectric constant of medium substrate 9 of the invention is 10.2, with a thickness of 1.27mm, circuit copper facing
Layer with a thickness of 35um.
Ultra wide band bandpass filter design of the invention: half-wavelength short circuit minor matters microstrip line 2 is located at the center of medium substrate 9
Position, the lower section load open circuit minor matters microstrip line 3 in two sides, is then coupling linear type microstrip line, and simultaneously in medium above
The bilateral of substrate 9 introduces input, output feeder, forms ultra wide band bandpass filter.
The design of trap structure: wide minor matters microstrip line 6 is loaded in the two sides of half-wavelength short circuit minor matters microstrip line 2 and forms step
Electric impedance resonator, the then direct-coupling type of falling π resonator 5 above, can by adjusting wide minor matters microstrip line 6 length and fall
The open circuit minor matters length of π type resonator 5 changes the position of trap centre frequency.
Miniature double trap ultra-wide band filters based on the type of falling π resonator of the invention can be realized trap characteristic, use
Simulation software HFSS carries out simulation calculation to the structure, and obtained simulation result is as shown in Figure 3.It can be seen from the chart, the filter
The trap of wave device is located at 5.8GHz and 8.0GHz, and there are two transmission zeros outside for band, and it is special that good Out-of-band rejection has been effectively ensured
Property.The ultra-wide band filter overall dimensions are 16.8mm*6mm, and structure is very compact, does not need using defect technology, is conducive to
It is integrated.
The present invention in 2 two sides of half-wavelength short circuit minor matters microstrip line is loaded directly into wide minor matters microstrip line 6, and to form Stepped Impedance humorous
Shake device, significantly reduces the design size of filter and forms the trap at 8GHz；On half-wavelength short circuit minor matters microstrip line 2
The trap that the side's coupling type of falling π resonator 5 can form 5.8GHz becomes the ultra-wide band filter with double trap characteristics, the filtering
Device has compact to design, easy to process, the advantages such as band selective is high, and Out-of-band rejection effect is good.
The above is a preferred embodiment of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, it is noted that for those skilled in the art, without departing from the principle of the present invention, may be used also
To make several improvement and variation, these, which improve and change, is also considered as protection scope of the present invention.
Claims (7)
1. a kind of miniature double trap ultra-wide band filters based on the type of falling π resonator, it is characterised in that: including medium substrate (9),
Half-wavelength short circuit minor matters microstrip line (2), load at the medium substrate (9) center is micro- in the half-wavelength short circuit minor matters
The wide minor matters microstrip line of open circuit minor matters microstrip line (3) with line (2) two sides and load above open circuit minor matters microstrip line (3)
(6)；
Linear type insertion coupled microstrip line (4) is formed between the open circuit minor matters microstrip line (3) and wide minor matters microstrip line (6)；
Linear type insertion coupled microstrip line (4) bottom is equipped with the input terminal feeder line (1) for being located at medium substrate (9) two sides
With output end feeder line (7)；
The type of falling π resonator (5) are coupled with above the half-wavelength short circuit minor matters microstrip line (2).
2. miniature double trap ultra-wide band filters based on the type of falling π resonator as described in claim 1, which is characterized in that institute
State the coupling distance of linear type insertion coupled microstrip line (4) and upper and lower wide minor matters microstrip line (6) and open circuit minor matters microstrip line (3)
It is equal.
3. miniature double trap ultra-wide band filters based on the type of falling π resonator as described in claim 1, it is characterised in that: institute
The lower surface for stating medium substrate (9) is formed with metal ground plate (10), and the copper plate of medium substrate (9) upper surface has filter
Wave device circuit structure (8).
4. miniature double trap ultra-wide band filters based on the type of falling π resonator as claimed in claim 3, it is characterised in that: institute
State input terminal feeder line (1), half-wavelength short circuit minor matters microstrip line (2), open circuit minor matters microstrip line (3), linear type insertion coupling microstrip
Line (4), the type of falling π resonator (5), wide minor matters microstrip line (6) and output end feeder line (7) constitute the filter circuit configuration (8).
5. miniature double trap ultra-wide band filters based on the type of falling π resonator as described in claim 1, it is characterised in that: institute
Open circuit minor matters microstrip line (3) is stated to be loaded respectively in the lower section of half-wavelength short circuit minor matters microstrip line (2) two sides.
6. miniature double trap ultra-wide band filters based on the type of falling π resonator as described in claim 1, it is characterised in that: institute
It states wide minor matters microstrip line (6) load and forms step impedance resonator in the top of open circuit minor matters microstrip line (3).
7. miniature double trap ultra-wide band filters based on the type of falling π resonator as claimed in claim 3, it is characterised in that: institute
The relative dielectric constant for stating medium substrate (9) is 10.2, with a thickness of 1.27mm；The copper plate with a thickness of 35um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910523717.7A CN110137641A (en) | 2019-06-17 | 2019-06-17 | A kind of miniature double trap ultra-wide band filters based on the type of falling π resonator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910523717.7A CN110137641A (en) | 2019-06-17 | 2019-06-17 | A kind of miniature double trap ultra-wide band filters based on the type of falling π resonator |
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| Publication Number | Publication Date |
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| CN110137641A true CN110137641A (en) | 2019-08-16 |
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| CN201910523717.7A Pending CN110137641A (en) | 2019-06-17 | 2019-06-17 | A kind of miniature double trap ultra-wide band filters based on the type of falling π resonator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600842A (en) * | 2019-10-21 | 2019-12-20 | 合肥师范学院 | Four-frequency-band microstrip band-pass filter with trapped wave characteristic and design method thereof |
| CN112072229A (en) * | 2020-09-08 | 2020-12-11 | 中国人民解放军战略支援部队信息工程大学 | Four-order microstrip band-pass filter with diagonal coupling box-type topological structure |
| CN115051126A (en) * | 2022-06-23 | 2022-09-13 | 辽宁工程技术大学 | Four-trapped wave ultra-wideband filter based on novel double-open-loop resonator |
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| CN208315717U (en) * | 2018-06-26 | 2019-01-01 | 井冈山大学 | Using the small sized double frequency bandpass filter of minor matters load bending type defected microstrip structure |
| CN109728387A (en) * | 2018-12-24 | 2019-05-07 | 上海海事大学 | Four bandpass filters |
| CN209691916U (en) * | 2019-06-17 | 2019-11-26 | 辽宁工程技术大学 | A kind of miniature double trap ultra-wide band filters based on the type of falling π resonator |
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2019
- 2019-06-17 CN CN201910523717.7A patent/CN110137641A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102361111A (en) * | 2011-10-08 | 2012-02-22 | 上海大学 | Ultra-wideband (UWB) filter with band-notched characteristics |
| CN104124496A (en) * | 2014-07-29 | 2014-10-29 | 电子科技大学 | Microstrip tri-band bandpass filter |
| CN106876842A (en) * | 2015-12-13 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | Double trap bandpass filters of the single open circuit minor matters of toroidal cavity resonator loading |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600842A (en) * | 2019-10-21 | 2019-12-20 | 合肥师范学院 | Four-frequency-band microstrip band-pass filter with trapped wave characteristic and design method thereof |
| CN112072229A (en) * | 2020-09-08 | 2020-12-11 | 中国人民解放军战略支援部队信息工程大学 | Four-order microstrip band-pass filter with diagonal coupling box-type topological structure |
| CN112072229B (en) * | 2020-09-08 | 2021-10-19 | 中国人民解放军战略支援部队信息工程大学 | Four-order microstrip band-pass filter with diagonal coupling box-type topological structure |
| CN115051126A (en) * | 2022-06-23 | 2022-09-13 | 辽宁工程技术大学 | Four-trapped wave ultra-wideband filter based on novel double-open-loop resonator |
| CN115051126B (en) * | 2022-06-23 | 2023-11-17 | 辽宁工程技术大学 | Four-notch ultra-wideband filter based on novel double open-loop resonators |
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