CN202142626U - Isosceles right angled triangle micro-strip band pass filter based on fractal defect structure - Google Patents
Isosceles right angled triangle micro-strip band pass filter based on fractal defect structure Download PDFInfo
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- CN202142626U CN202142626U CN201120204602U CN201120204602U CN202142626U CN 202142626 U CN202142626 U CN 202142626U CN 201120204602 U CN201120204602 U CN 201120204602U CN 201120204602 U CN201120204602 U CN 201120204602U CN 202142626 U CN202142626 U CN 202142626U
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Abstract
The present utility model relates to an isosceles right angled triangle micro-strip band pass filter based on a fractal defect structure, and belongs to the microwave communication equipment technology field. The filter is composed of one or two isosceles right angled triangle patches, one or two isosceles triangle defects are made inside the patches to improve the performance of the filter, and excitation lines are adopted as input and output feed lines to enhance the coupling. The triangle perturbations are all isosceles triangles, the size of the fractal perturbation source can be changed to control the working frequency of the filter, broaden the stop band and reduce the interference. The filter is realized through a single patch resonator, thus the size of the filter is smaller than that of the traditional coupling structure filter, the miniaturization is easily realized, and the practical effect is good. The performance of the filter is greatly increased through the fractal defects. The filter is simple in structure, easily manufactured and low in cost, is suitable for large scale production, and can be widely used in miniature radio frequency communication systems.
Description
Technical field
The utility model is based on the isosceles right triangle microstrip bandpass filter of fractal defect sturcture; What adopt is considerably less, the novel isosceles right triangle patch resonator of current research; And fractal technology is applied to Design of Filter; And use the micro-strip excitation line as feeder line, improved the performances such as bandwidth and loss of filter.
Technical background
Microwave filter is one of modal components and parts in the systems such as radar system, communication system, measuring system, and the quality of its performance often directly has influence on the quality of whole communication system, also is the microwave passive component the most important, that technology content is the highest simultaneously.Along with the modern communications development of electronic technology, show high-performance plane microwave filter day important.In order to improve message capacity and to avoid the interference between adjacent channel, require filter that good frequency selectivity must be arranged; In order to improve signal to noise ratio, requiring to have low insertion loss in the passband; In order to satisfy the trend toward miniaturization at modern communications terminal, require filter that littler volume and weight will be arranged, sometimes filter size even more important than performance.Because present microwave applications system is more and more to the miniaturization integrated development, so the miniaturization of filter becomes the focus of research, and the performance that on the basis of miniaturization, how to improve filter becomes the main contents of filter research.The band stop filter that adopts paster structure to realize at present is considerably less.
Fractal concept is that mathematician Man Debu rood (B.B.Mandelbort) is at first summed up and proposed.Fractal original meaning is irregular, the bitty meaning, and fractal have self-similarity and a space fillibility, utilizes its space filling characteristic can realize the miniaturization of radio circuit.At present, fractal theory and technology draw attention and are employed at many ambits, are mainly used in antenna in microwave regime, and it is also rarely found to be applied to the report of filter, particularly is applied to the patch filter design.Have rule fractal and random fractal fractal can being divided into, and the utility model uses random fractal defective to realize the band pass filter of miniaturization, has most important theories and practical significance.
In radio-frequency devices research in the past, many microwave scientific workers have proposed the patch resonator structure of multiple pattern, comprise annular, side's annular, circle paster, square paster or the like structure, but very rare people study the triangles chip architecture.Isosceles right triangle patch resonator particularly; Fractal thought is applied to Filter Design; Particularly be applied in the isosceles right triangle patch resonator, still very novel trial, and after the introducing excitation lines is as feeder line, strengthened coupling.
The utility model content
The operation principle of the utility model: fractal technology can make the resonance performance of the original mode of resonance of patch resonator change: promptly certain or some pattern may divide; The resonance point of some pattern can be close to each other; The resonance point of some pattern farther distance that can be separated from each other; Also have the resonance of some pattern to be weakened greatly even to curb, just can achieve the above object, so this new technology can use single card sheet resonator to realize multi-functional, high performance filter through control to fractal perturbation source; Overcome microstrip coupled Structure Filter size big, require shortcoming such as close coupling, realize having brought hope for the industrialization of filter.
The purpose of the utility model is to provide a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture; This filter advantages of small volume, make simple, with low cost, to be convenient to planar circuit integrated; Use fractal defective and reduced operating frequency; Greatly widened the bandwidth of last stopband, and improved the performance of filter greatly, can promote the use of in the multiple small-sized microwave system.
In order to achieve the above object, the technical scheme taked of the utility model is:
A kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture; Comprise: the metal micro-strip paster of positive part, the coat of metal of reverse side part, the dielectric-slab and the input/output port in intermediate layer; It is characterized in that: the metal micro-strip paster of positive part and input/output port are at grade; The coat of metal of reverse side part is the ground plate of metal micro-strip paster, and the dielectric-slab in intermediate layer is between the metal micro-strip paster and the reverse side coat of metal partly of front part; Said metal micro-strip paster comprises the patch resonator of the fractal perturbation of at least one band triangle; Said patch resonator incoming feeder and output feeder are on same horizontal line; And be positioned at the position, base of patch resonator; Be coupled through the slit with patch resonator, also the symmetry axis with the fractal perturbation of patch resonator inside triangle is vertical each other with output feeder for said incoming feeder.
Aforesaid a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture is characterized in that: the metal material of the coat of metal of the metal micro-strip paster of said positive part and reverse side part all adopts good gold, silver of electric conductivity or copper.
Aforesaid a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture, it is characterized in that: said patch resonator is the isosceles right triangle shape.
Aforesaid a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture; It is characterized in that: the inner fractal perturbation of triangle of isosceles right triangle patch resonator is to be made up of an isosceles triangle defective; And the isosceles triangle defective do not contact with the borderline phase of isosceles right triangle patch resonator, and whole filter becomes zhou duicheng tuxing.
Aforesaid a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture; It is characterized in that: the inner fractal perturbation of triangle of isosceles right triangle patch resonator is to be made up of two isosceles triangle defectives that link to each other up and down; The total same symmetry axis of two isosceles triangle defectives and isosceles right triangle patch resonator; The summit of top isosceles triangle defective and the summit of isosceles right triangle patch resonator coincide; The summit of following isosceles triangle defective is positioned on the mid point on top isosceles triangle defective base, and whole filter becomes zhou duicheng tuxing.
Aforesaid a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture; It is characterized in that: the border that the inside of said incoming feeder and output feeder has respectively and be shaped as the defective of
or
to break feeder line; Constitute excitation lines; The width of
and
shape defective is 0.2mm, and left-right symmetric.
Aforesaid a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture; It is characterized in that: said metal micro-strip paster is made up of laterally zygomorphic two identical isosceles right triangle patch resonator; Shared incoming feeder and the output feeder that is arranged between the two of said two isosceles right triangle patch resonator; Two isosceles right triangle patch resonator set inside the fractal perturbation of triangle is arranged, whole filter is all symmetrical up and down.
Aforesaid a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture; It is characterized in that: the inner fractal perturbation of triangle of each isosceles right triangle patch resonator comprises the isosceles triangle defective of two different sizes; The summit of top isosceles triangle defective overlaps with the summit of isosceles right triangle patch resonator, and the summit of following isosceles triangle defective is positioned on the base mid point of isosceles right triangle patch resonator.
Aforesaid any one isosceles right triangle microstrip bandpass filter based on fractal defect sturcture is characterized in that: the distance on said incoming feeder and output feeder and isosceles right triangle patch resonator base is between 0.1mm to 0.4mm.
Aforesaid a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture is characterized in that: the distance on said incoming feeder and output feeder and isosceles right triangle patch resonator base is 0.2mm.
The beneficial effect of the utility model is:
1, the utility model is on the basis of traditional patch resonator; Adopt novel isosceles right triangle patch resonator structure; And use the fractal defective perturbation technique on through border, perturbation technique, micro-strip excitation line technology and the double resonator coupling technique on through border respectively; Successfully design pass filter, improved the performance of isosceles right triangle filter.This kind filter can have only a paster structure, also can use two paster structures, all satisfies the requirement of current Design of Filter miniaturization, and has solved the problem that the radiation loss of conventional filter is big and can not effectively suppress high order harmonic component.
2, the utility model adopts the novel isosceles right triangle structure with fractal defective, and is littler than similar rectangle or box filter device size, meets the demand for development of Modern Communication System miniaturization.
3, this filter has less insertion loss, and the outer inhibition ability of good band has solved the high-performance question of triangle filter.
4, this filter construction is very simple, and the perturbation simplicity generosity all utilizes little band PCB explained hereafter, and cost is low, be prone to processing and can guarantee machining accuracy, can applied codeization, large-scale production.Can be applied to the miniaturization communication equipment.
Description of drawings
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the structure for amplifying sketch map of feeder line among the embodiment 1;
Fig. 3 is the frequency response simulation result of embodiment 1;
Fig. 4 is the structural representation of embodiment 2;
Fig. 5 is the structure for amplifying sketch map of feeder line among the embodiment 2;
Fig. 6 is the sketch map of the resonator resonance performance of embodiment 2;
The contrast of frequency response when Fig. 7 is the inner perturbation size of the change of embodiment 2;
Fig. 8 is the simulation result of embodiment 2 and the comparison diagram of actual test result;
Fig. 9 is the structural representation of embodiment 3;
The contrast of the frequency response when Figure 10 is the inner perturbation triangle size of the change of embodiment 3;
Figure 11 is the simulation result of embodiment 3 and the comparison diagram of actual test result.
Embodiment
Utilize three embodiment that the utility model is carried out detailed explanation below; Three embodiment are being to implement under the prerequisite with the utility model technical scheme all; Provided detailed execution mode and concrete operating process, but the protection range of the utility model is not limited to following embodiment 1, embodiment 2 and embodiment 3.
Embodiment 1: combine accompanying drawing 1-2 that the embodiment 1 of the utility model is done detailed explanation.As shown in Figure 1, this filter comprises: the metal micro-strip paster of positive part and input/output port, the coat of metal of reverse side part and the dielectric layer of mid portion.The metal micro-strip paster is included in isosceles right triangle patch resonator 1, incoming feeder 3 and the output feeder 4 that inside is provided with isosceles triangle defective perturbation 2, and excitation 5 is inner at feeder line.Embodiment 1 is regulated the operating frequency of filter by the variation of the fractal defective locations of isosceles triangle.
This filters to test result: centre frequency is 3.1GHz, and relative bandwidth is 7.4%, and it is 2dB that passband inserts loss, and simulation result and test result are approximate.
Embodiment 2: combine accompanying drawing 4-5 that the embodiment 2 of the utility model is done detailed explanation.As shown in Figure 4, this filter comprises: the metal micro-strip paster of positive part and input/output port, the coat of metal of reverse side part and the dielectric layer of mid portion.Metal micro-strip line is included in isosceles right triangle patch resonator 1, incoming feeder 3 and the output feeder 4 that inside is provided with two isosceles triangle defective perturbations 2 that link to each other up and down, and excitation 5 is inner at feeder line.
Two isosceles triangle defectives perturbation 2 and isosceles right triangle patch resonator 1 total same symmetry axis; The summit of top isosceles triangle defective perturbation 2 and the summit of isosceles right triangle patch resonator 1 coincide; The summit of following isosceles triangle defective perturbation 2 is positioned on the mid point on top isosceles triangle defective perturbation 2 bases, and whole filter becomes zhou duicheng tuxing.Present embodiment is regulated the operating frequency of filter by the variation of the fractal defective locations of isosceles triangle.
The filter of present embodiment design has highly stable performance, and its stability can see from Fig. 7 that Fig. 6 has provided the resonance characteristic curve chart of this resonator, and the actual measured results of this filter and the contrast of simulation result are as shown in Figure 8.The actual test result of this filter: operating frequency is 2.6GHz, and differential loss is 1.4dB in the band, and relative bandwidth is 7.3%, and simulation result and test result are approximate.
Embodiment 3: combine the embodiment 3 of 9 pairs of the utility model of accompanying drawing to do detailed explanation.As shown in Figure 9, this filter comprises: the microband paste of positive part and input/output port, the coat of metal of reverse side part and the dielectric layer of mid portion.Microband paste is made up of laterally zygomorphic two identical isosceles right triangle patch resonator 1; Two isosceles right triangle patch resonator 1 shared incoming feeders 3 and output feeder 4 that are arranged between the two have the fractal perturbation of triangle two isosceles right triangle patch resonator set inside.
Each isosceles right triangle patch resonator 1 inner fractal perturbation of triangle comprises the isosceles triangle defective perturbation 2 of two different sizes; The summit of top isosceles triangle defective perturbation 2 overlaps with the summit of isosceles right triangle patch resonator 1; The summit of following isosceles triangle defective perturbation 2 is positioned on the base mid point of isosceles right triangle patch resonator 1, just just in time is in the critical point of breaking isosceles right triangle patch resonator 1 border.
Figure 11 is the actual measured results of this filter and the contrast of simulation result, the actual test result of this filter: the central task frequency is 2.6GHz, and differential loss is 1.4dB in the band, and relative bandwidth is 7.3%, and simulation result and test result are approximate.
The metal material of the coat of metal of the metal micro-strip paster of embodiment 1, embodiment 2 and embodiment 3 and reverse side part all can be gold, silver or copper.The survey tool that three embodiment are carried out actual test is the vector network analyzer of the E5071C model of Agilent (Agilent) company production.
Show and described basic principle of the utility model and the advantage of principal character and the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (2)
1. isosceles right triangle microstrip bandpass filter based on fractal defect sturcture; Comprise: the metal micro-strip paster of positive part, the coat of metal of reverse side part, the dielectric-slab and the input/output port in intermediate layer; It is characterized in that: the metal micro-strip paster of positive part and input/output port are at grade; The coat of metal of reverse side part is the ground plate of metal micro-strip paster, and the dielectric-slab in intermediate layer is between the metal micro-strip paster and the reverse side coat of metal partly of front part; Said metal micro-strip paster comprises the patch resonator of the fractal perturbation of at least one band triangle; Said patch resonator incoming feeder and output feeder are on same horizontal line; And be positioned at the position, base of patch resonator; Be coupled through the slit with patch resonator, also the symmetry axis with the fractal perturbation of the inner fractal triangle of patch resonator is vertical each other with output feeder for said incoming feeder.
2. a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture according to claim 1 is characterized in that: the metal material of the coat of metal of the metal micro-strip paster of said positive part and reverse side part all adopts good gold, silver of electric conductivity or copper.
3, a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture according to claim 2, it is characterized in that: said patch resonator is the isosceles right triangle shape.
4, a kind of isosceles right triangle microstrip bandpass filter according to claim 3 based on fractal defect sturcture; It is characterized in that: the inner fractal perturbation of triangle of isosceles right triangle patch resonator is to be made up of an isosceles triangle defective; And the isosceles triangle defective do not contact with the borderline phase of isosceles right triangle patch resonator, and whole filter becomes zhou duicheng tuxing.
5, a kind of isosceles right triangle microstrip bandpass filter according to claim 3 based on fractal defect sturcture; It is characterized in that: the inner fractal perturbation of triangle of isosceles right triangle patch resonator is to be made up of two isosceles triangle defectives that link to each other up and down; The total same symmetry axis of two isosceles triangle defectives and isosceles right triangle patch resonator; The summit of top isosceles triangle defective and the summit of isosceles right triangle patch resonator coincide; The summit of following isosceles triangle defective is positioned on the mid point on top isosceles triangle defective base, and whole filter becomes zhou duicheng tuxing.
6, according to claim 4 or 5 described a kind of isosceles right triangle microstrip bandpass filters based on fractal defect sturcture; It is characterized in that: the border that the inside of said incoming feeder and output feeder has a defective that is shaped as " ┓ " or " ┏ " to break feeder line respectively; Constitute excitation lines; The width of " ┓ " and " ┏ " shape defective is 0.2mm, and left-right symmetric.
7, a kind of isosceles right triangle microstrip bandpass filter according to claim 3 based on fractal defect sturcture; It is characterized in that: said metal micro-strip paster is made up of laterally zygomorphic two identical isosceles right triangle patch resonator; Shared incoming feeder and the output feeder that is arranged between the two of said two isosceles right triangle patch resonator; Two isosceles right triangle patch resonator set inside the fractal perturbation of triangle is arranged, whole filter is all symmetrical up and down.
8, a kind of isosceles right triangle microstrip bandpass filter according to claim 7 based on fractal defect sturcture; It is characterized in that: the inner fractal perturbation of triangle of each isosceles right triangle patch resonator comprises the isosceles triangle defective of two different sizes; The summit of top isosceles triangle defective overlaps with the summit of isosceles right triangle patch resonator, and the summit of following isosceles triangle defective is positioned on the base mid point of isosceles right triangle patch resonator.
9, according to claim 3,4,5,7,8 described any one isosceles right triangle microstrip bandpass filters based on fractal defect sturcture, it is characterized in that: the distance on said incoming feeder and output feeder and isosceles right triangle patch resonator base is between 0.1mm to 0.4mm.
10, a kind of isosceles right triangle microstrip bandpass filter based on fractal defect sturcture according to claim 9, it is characterized in that: the distance on said incoming feeder and output feeder and isosceles right triangle patch resonator base is 0.2mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120204602U CN202142626U (en) | 2011-06-17 | 2011-06-17 | Isosceles right angled triangle micro-strip band pass filter based on fractal defect structure |
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| CN201120204602U CN202142626U (en) | 2011-06-17 | 2011-06-17 | Isosceles right angled triangle micro-strip band pass filter based on fractal defect structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489984A (en) * | 2016-01-18 | 2016-04-13 | 中国矿业大学 | Fractal defected structured quarter-mode substrate integrated waveguide bandpass filter |
| CN107946707A (en) * | 2017-10-26 | 2018-04-20 | 中山大学 | Balance bandpass filter and its design method based on right angled triangle paster structure |
| CN111276780A (en) * | 2020-02-10 | 2020-06-12 | 电子科技大学 | Band-pass filter based on fan-shaped microstrip resonant cavity |
| 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 |
-
2011
- 2011-06-17 CN CN201120204602U patent/CN202142626U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489984A (en) * | 2016-01-18 | 2016-04-13 | 中国矿业大学 | Fractal defected structured quarter-mode substrate integrated waveguide bandpass filter |
| CN107946707A (en) * | 2017-10-26 | 2018-04-20 | 中山大学 | Balance bandpass filter and its design method based on right angled triangle paster structure |
| CN107946707B (en) * | 2017-10-26 | 2019-09-20 | 中山大学 | Balance bandpass filter and its design method based on right angled triangle paster structure |
| CN111276780A (en) * | 2020-02-10 | 2020-06-12 | 电子科技大学 | Band-pass filter based on fan-shaped microstrip resonant cavity |
| 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 |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20140617 |
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