CN101246983A - Ultra-wideband filter based on simplified left hand transmission line structure - Google Patents
Ultra-wideband filter based on simplified left hand transmission line structure Download PDFInfo
- Publication number
- CN101246983A CN101246983A CNA2008100198017A CN200810019801A CN101246983A CN 101246983 A CN101246983 A CN 101246983A CN A2008100198017 A CNA2008100198017 A CN A2008100198017A CN 200810019801 A CN200810019801 A CN 200810019801A CN 101246983 A CN101246983 A CN 101246983A
- Authority
- CN
- China
- Prior art keywords
- transmission line
- ultra
- left hand
- microstrip
- line structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The present invention relates to an ultra-wideband filter with simplified left hand transmit line structure which belongs to field of microwave communication equipment. The filter comprises of input port, output port and at least one microstrip transmission line structure cell on PCB board. Feeders of input port and output port are connected with the first and the last microstrip transmission line structure cell respectively by microstrip transmission line of 50 ohmic. Each microstrip transmission line structure cell can be equivalent to cascade of inductance in serial, capacitance in parallel and inductance in serial, wherein, the inductance in serial and capacitance in parallel can be realized by narrow microstrip transmission line and board microstrip transmission line, inductance in parallel is realized by narrow microstrip transmission line whose end passed the metal through hole to grounding. The filter of present invention has easy design, convenient production, small dimension and better out-band and in-band filtering capability.
Description
Technical field:
The present invention relates to a kind of ultra wide band bandpass filter that utilizes the left hand transmission line structure of simplification, belong to the microwave communication equipment technical field, particularly the ultra-wideband microwave Filter Design.
Background technology:
2002 FCC (FCC) frequency range of 3.1GHz～10.6GHz is free and open as after the application of the communications field, the ultra broadband short-distance wireless communication has caused that the global communication technical field pays close attention to greatly.And filter is the passive device of indispensable and extensive use in the communication system, becomes one of research focus especially.Because ultra-wide band filter requires to be operated in the frequency band of the such broad of 3.1GHz～10.6GHz, and requires this filter that less size is arranged, traditional filter design method can't be designed wide band filter like this.
The method that realizes ultra-wide band filter has at present by forming dual-attenuation and obtains passband, or the structure cascade or nested the forming of low pass and high pass filter are realized passband.Structure such as parallel coupled line, co-planar waveguide, microstrip line, strip line, resonant ring and form are used to the design ultra-wide band filter.But design possesses small size simultaneously, has good filtering performance, and simple, the easily manufactured ultra wide band bandpass filter of method for designing is still a major challenge.
Summary of the invention:
Goal of the invention: the object of the invention is the deficiency that exists in the existing filter design method to provide a kind of new method that can realize the Design of Bandpass of ultra broadband filtering.Ultra-wide band filter method for designing provided by the present invention is simple and easy to do, can cover the frequency range of 3.1GHz～10.6GHz, and size is less, and has in the good band and the outer filtering performance of band.
Technical scheme: the ultra-wide band filter that utilizes simplified left hand transmission line structure of the present invention comprises the left hand transmission line structure unit of an input port, an output port and at least one simplification on pcb board.Input and output the feeder line microstrip line by 50 ohm respectively are connected with the left hand transmission line structure unit of first and last simplification.Each microstrip line construction unit is made of series inductance, shunt capacitance and shunt inductance, wherein series inductance is realized by narrow microstrip transmission line, shunt capacitance is realized that by the direct-to-ground capacitance of wide microstrip transmission line shunt inductance is realized by the narrow microstrip line of metallic vias ground connection by end.Via hole is arranged on the end of microstrip line, by medium substrate, connects upper strata metal micro-strip line and lower metal floor.Each microstrip line construction unit directly links to each other successively.Each microstrip line construction unit measure-alike.
The narrow microstrip transmission line of ground connection can be distributed in the same side or the upper and lower both sides of main transmission line.Linear pattern can be, also broken line type can be, or other shapes.The bending section of broken line type can point to input, or points to output.
The width and the length of wide by changing, narrow and ground connection microstrip transmission line, passband frequency range that can control filters.This filter constitutes based on the left hand transmission line structure of simplifying.The left hand transmission line structure of simplifying is different with traditional transmission line structure, and cascade that can equivalence one-tenth shunt capacitance, series inductance and shunt inductance can form the conducting band in certain frequency range.The low-frequency cut-off frequency of passband is decided by shunt capacitance and shunt inductance.Shunt capacitance and shunt inductance are big more, and low-frequency cut-off frequency is more little.The high-frequency cut-off frequency of passband is decided by shunt capacitance, series inductance and shunt inductance.When the passband broad, the high-frequency cut-off frequency depends mainly on shunt capacitance and series inductance.Shunt capacitance and series inductance are more little, and the high-frequency cut-off frequency is big more.By the empirical Calculation formula of microstrip line, can be according to realizing that logical required inductance, the capacitance of frequency range of a certain band obtains the concrete Microstrip Length and the parameter of width, this technology is a mature technology, can consult the microwave engineering handbook.The ground connection microstrip transmission line of the ultra-wide band filter of the 3.1GHz～10.6GHz of method design is only grown 0.17 wavelength thus, is better than the band pass filter of the quarter-wavelength stub in the traditional design method.According to different instructions for uses, can select the transmission line structure of different units quantity to be combined into integral body, satisfy different filter bandwidhts and frequency band range requirement, and a plurality of unit cascaded after, can not cause energy loss, the filter filtering performance of cascade more piece is better.
Beneficial effect: the present invention compared with prior art, its remarkable advantage is: 1, method for designing is simple, just can obtain the Filter Structures size according to the scope of passband; 2, the filter of designing can realize that the ultra broadband band of 3.1GHz～10.6GHz is logical; 3, filter has less in-band insertion loss, the outer performance of the passband edge of sharp cut-off and good band; 4, filter has less size, and the precision requirement of making is lower, is beneficial to large batch of industrial production and makes.
Description of drawings:
Fig. 1 is a ultra-wide band filter agent structure schematic diagram of the present invention.
Fig. 2 is a ultra-wide band filter Facad structure schematic diagram of the present invention.
Fig. 3 is the equivalent circuit theory figure of ultra-wide band filter of the present invention.
Fig. 4 is the stimulation frequency response curve that adopts the ultra-wide band filter of varying number construction unit.
Fig. 5 is the return wave loss parameter (S of ultra-wide band filter of the present invention
11) curve chart.
Fig. 6 is the loss parameter (S of ultra-wide band filter of the present invention
21) curve chart.
Fig. 7 is the group delay curve chart of ultra-wide band filter of the present invention.
Fig. 8 is two agent structure schematic diagrames in addition of the embodiment of ultra-wide band filter of the present invention, with the different distributions form of explanation short circuit microstrip line.
In all above-mentioned accompanying drawings, identical label represents to have identical, similar or corresponding feature or function.
Embodiment:
Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail by specific embodiment.Embodiment 1: the structure chart of describing with reference to figure 1～2 that utilizes the ultra wide band bandpass filter of simplified left hand transmission line structure of the present invention at first.
The ultra-wide band filter that utilizes simplified left hand transmission line structure of the present invention comprises the left hand transmission line structure unit of an input port 1, an output port 2 and at least one simplification on pcb board.Input is connected with first microstrip line construction unit by 50 ohm microstrip line 3, and output is connected with last microstrip line construction unit by 50 ohm microstrip line 4.Each microstrip line construction unit is made of series inductance, shunt capacitance and shunt inductance, and equivalent-circuit model is seen Fig. 3.L
RCorresponding to series inductance, L
LCorresponding to shunt inductance, C
RCorresponding to shunt capacitance.Wherein series inductance is realized by narrow microstrip transmission line, and shunt capacitance is realized that by the direct-to-ground capacitance of wide microstrip transmission line shunt inductance is realized by the narrow microstrip transmission line of metallic vias ground connection by end.Each microstrip line construction unit directly links to each other successively.Each microstrip line construction unit measure-alike.The left hand transmission line structure unit of first simplification comprises the left-half of narrow microstrip line 6, metallic vias 7, narrow microstrip line 8 and the wide metal micro-strip line 9 of wide microstrip line 5, terminal short circuit.The left hand transmission line structure unit of second simplification comprises the left-half of narrow microstrip line 10, metallic vias 11, narrow microstrip line 12 and the wide microstrip line 13 of the right half part of wide metal micro-strip line 9, terminal short circuit.The left hand transmission line structure unit of the 3rd simplification comprises the left-half of narrow microstrip line 14, metallic vias 15, narrow microstrip line 16 and the wide microstrip line 17 of the right half part of wide metal micro-strip line 13, terminal short circuit.The left hand transmission line structure unit of the 4th simplification comprises narrow microstrip line 18, metallic vias 19, narrow microstrip line 20 and the wide microstrip line 21 of the right half part of wide metal micro-strip line 17, terminal short circuit.Via hole is arranged on the end of microstrip line, by medium substrate 22, connects upper strata metal micro-strip line and lower metal floor 23.Each adjacent microstrip line construction unit directly links to each other.The input of this filter passes through 50 ohm microstrip line 1 input signal, and output passes through 50 ohm microstrip line 4 output signals.
It is 2.2 that embodiments of the invention adopt relative dielectric constant, is of a size of Rogers 5880 medium substrates 22 of 36.5mm * 10mm * 0.5mm.Each the long 5mm of 50 ohm microstrip that connects input/output terminal, wide 1.5mm, each two ends, microstrip line construction unit constitutes all long 2.8mm of wide microstrip line of shunt capacitance, wide 3.8mm; Constitute the wide 0.3mm of narrow microstrip line of series inductance, long 0.8mm; Constitute the wide 0.3mm of narrow short circuit microstrip line of shunt inductance, connect a segment length 2.8mm of series connection microstrip line, connect a segment length 2.6mm of via hole.The equal 0.15mm of the radius of metallic vias, high 0.5mm.
When the microstrip line construction that adopts different units is made filter, the performance of filter difference that obtains.Fig. 4 is the characteristic frequency curve chart that adopts the filter of 2 joints, 4 joints, 6 joint microstrip line constructions.Can see the increase along with the number of the microstrip transmission line structure unit that is adopted, the steepness of passband edge increases, and the band outside inhibitory can be better.We have carried out equivalent electric circuit emulation and the emulation of Finite Element electromagnetism all-wave to the filter that 4 joint microstrip line construction unit are arranged.Fig. 5 is the return wave loss parameter (S of ultra-wide band filter of the present invention
11) curve chart.Fig. 6 is the loss parameter (S of ultra-wide band filter of the present invention
21) curve chart.Fig. 7 is the group delay curve chart of ultra-wide band filter of the present invention.Can see that equivalent electric circuit emulation and Finite Element electromagnetism all-wave simulation result are identical substantially.In Finite Element emulation, in passband, S
21Greater than-0.5dB, S
11Less than-16dB; Outside passband greater than in 12GHz and the frequency band less than 1.5GHz, S
21Less than-20dB.In passband, group delay changes smooth, and average group delay is 0.25ns.Can see that utilize the ultra-wide band filter of simplified left hand transmission line structure, method for designing is simple, and is not high to the processing technology required precision, the ultra-wide band filter of design has good performance inside and outside band, has realized that the broadband of 3.1GHz～10.6GHz is logical.
Embodiment 2: with reference to Fig. 8, the short microstrip line minor matters of the ground connection of filter of the present invention can have multiple different distribution form.The narrow microstrip transmission line of ground connection can be distributed in the same side or the upper and lower both sides of main transmission line.Linear pattern can be, also broken line type can be, or other shapes.The bending section of broken line type can point to input, or points to output.In addition, all the other are identical with embodiment 1.
The above only is the preferred embodiments of the present invention, can not limit scope of the invention process with this, and promptly all simple equivalent of being done according to claim of the present invention and description of the invention content change and modify, and all should still belong to the scope that patent of the present invention covers.
Claims (4)
1. a ultra-wide band filter that utilizes the left hand transmission line structure of simplification is characterized in that this filter comprises the left hand transmission line structure unit of an input port, the simplification on pcb board of an output port and at least one unit.Input and output the feeder line microstrip line by 50 ohm respectively are connected with the left hand transmission line structure unit of first and last simplification.Each transmission line structure unit can equivalence becomes the cascade of series inductance, shunt capacitance and shunt inductance, wherein series inductance and shunt capacitance are realized by narrow microstrip transmission line and wide microstrip transmission line respectively, and shunt inductance is realized by the narrow microstrip line of metallic vias ground connection by end.Each microstrip line construction unit directly links to each other successively.
2. as the ultra-wide band filter of the left hand transmission line structure of claim 1 described simplification, it is characterized in that the narrow microstrip transmission line of terminal ground connection can be linear pattern, also can be broken line type, or other shapes.The bending section of broken line type can point to input, or points to output.
3. as the ultra-wide band filter of the left hand transmission line structure of claim 1 described simplification, it is characterized in that the narrow microstrip transmission line of terminal ground connection can be distributed in the same side or the upper and lower both sides of main transmission line.
4. as the ultra-wide band filter of the left hand transmission line structure of claim 1 described simplification, it is characterized in that the measure-alike of each microstrip line construction unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100198017A CN101246983B (en) | 2008-03-17 | 2008-03-17 | Ultra-wideband filter based on simplified left hand transmission line structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100198017A CN101246983B (en) | 2008-03-17 | 2008-03-17 | Ultra-wideband filter based on simplified left hand transmission line structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101246983A true CN101246983A (en) | 2008-08-20 |
| CN101246983B CN101246983B (en) | 2012-08-22 |
Family
ID=39947286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100198017A Expired - Fee Related CN101246983B (en) | 2008-03-17 | 2008-03-17 | Ultra-wideband filter based on simplified left hand transmission line structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101246983B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078653A (en) * | 2012-12-26 | 2013-05-01 | 青岛歌尔声学科技有限公司 | Circuit for Bluetooth equipment and method for retraining influence of FPC (flexible printed circuit) board on Bluetooth antenna |
| CN103427139A (en) * | 2013-08-26 | 2013-12-04 | 南京理工大学 | Ultra-wideband band-pass filter |
| CN103532511A (en) * | 2013-10-08 | 2014-01-22 | 桂林市思奇通信设备有限公司 | Combiner with divider function |
| CN104241745A (en) * | 2014-09-05 | 2014-12-24 | 中国科学院微电子研究所 | Micro-strip filter |
| CN106785258A (en) * | 2016-11-29 | 2017-05-31 | 中国电子科技集团公司第二十九研究所 | A kind of Wide stop bands microstrip line low pass filter and method for designing |
| CN106848512A (en) * | 2016-12-14 | 2017-06-13 | 武汉凡谷电子技术股份有限公司 | Ultra wide band high-pass filter |
| CN108204857A (en) * | 2016-12-17 | 2018-06-26 | 中国石油天然气股份有限公司 | Vibration signal detecting system and its assembly method |
| CN108232380A (en) * | 2018-03-26 | 2018-06-29 | 华南理工大学 | A kind of highly integrated bimodulus rectangle resonator individual layer plane duplexer |
| CN109273806A (en) * | 2018-09-11 | 2019-01-25 | 上海海事大学 | Miniaturization low-pass filter based on hexagonal T-type resonator |
| CN110197021A (en) * | 2019-05-21 | 2019-09-03 | 清华大学深圳研究生院 | A method of microwave integrated circuit on-chip inductor and transformer are realized with transmission line |
| CN111682850A (en) * | 2020-06-29 | 2020-09-18 | 中国人民解放军空军工程大学 | Simplified left-right-hand composite transmission line unit and ultra-wideband phase shifter |
| CN112490612A (en) * | 2020-11-02 | 2021-03-12 | 许昌学院 | Single-negative metamaterial heterojunction with slits loaded on two sides based on coplanar waveguide |
| CN113285194A (en) * | 2021-05-28 | 2021-08-20 | 安徽华东光电技术研究所有限公司 | Miniaturized wide-suppression-band low-pass microstrip filter |
| CN113287225A (en) * | 2019-01-16 | 2021-08-20 | 日立安斯泰莫株式会社 | Signal transmission device |
| CN114026740A (en) * | 2019-06-27 | 2022-02-08 | 华为技术有限公司 | Low-cost filter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1855348A1 (en) * | 2006-05-11 | 2007-11-14 | Seiko Epson Corporation | Split ring resonator bandpass filter, electronic device including said bandpass filter, and method of producing said bandpass filter |
| CN100492755C (en) * | 2007-05-19 | 2009-05-27 | 中国科学技术大学 | Broadband/ultra-broadband micro band filter using left and right mixing transmission line structure |
-
2008
- 2008-03-17 CN CN2008100198017A patent/CN101246983B/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078653A (en) * | 2012-12-26 | 2013-05-01 | 青岛歌尔声学科技有限公司 | Circuit for Bluetooth equipment and method for retraining influence of FPC (flexible printed circuit) board on Bluetooth antenna |
| CN103078653B (en) * | 2012-12-26 | 2015-04-22 | 青岛歌尔声学科技有限公司 | Circuit for Bluetooth equipment and method for retraining influence of FPC (flexible printed circuit) board on Bluetooth antenna |
| CN103427139A (en) * | 2013-08-26 | 2013-12-04 | 南京理工大学 | Ultra-wideband band-pass filter |
| CN103427139B (en) * | 2013-08-26 | 2015-09-30 | 南京理工大学 | A kind of ultra wide band bandpass filter |
| CN103532511A (en) * | 2013-10-08 | 2014-01-22 | 桂林市思奇通信设备有限公司 | Combiner with divider function |
| CN104241745A (en) * | 2014-09-05 | 2014-12-24 | 中国科学院微电子研究所 | Micro-strip filter |
| CN106785258A (en) * | 2016-11-29 | 2017-05-31 | 中国电子科技集团公司第二十九研究所 | A kind of Wide stop bands microstrip line low pass filter and method for designing |
| CN106785258B (en) * | 2016-11-29 | 2019-07-12 | 中国电子科技集团公司第二十九研究所 | A kind of Wide stop bands microstrip line low-pass filter and design method |
| CN106848512A (en) * | 2016-12-14 | 2017-06-13 | 武汉凡谷电子技术股份有限公司 | Ultra wide band high-pass filter |
| CN106848512B (en) * | 2016-12-14 | 2019-06-07 | 武汉凡谷电子技术股份有限公司 | Ultra wide band high-pass filter |
| CN108204857A (en) * | 2016-12-17 | 2018-06-26 | 中国石油天然气股份有限公司 | Vibration signal detecting system and its assembly method |
| CN108204857B (en) * | 2016-12-17 | 2020-11-03 | 中国石油天然气股份有限公司 | Vibration signal detection system and assembly method thereof |
| CN108232380A (en) * | 2018-03-26 | 2018-06-29 | 华南理工大学 | A kind of highly integrated bimodulus rectangle resonator individual layer plane duplexer |
| CN108232380B (en) * | 2018-03-26 | 2020-06-19 | 华南理工大学 | High-integration double-mode rectangular resonator single-layer planar duplexer |
| CN109273806A (en) * | 2018-09-11 | 2019-01-25 | 上海海事大学 | Miniaturization low-pass filter based on hexagonal T-type resonator |
| CN113287225A (en) * | 2019-01-16 | 2021-08-20 | 日立安斯泰莫株式会社 | Signal transmission device |
| CN110197021A (en) * | 2019-05-21 | 2019-09-03 | 清华大学深圳研究生院 | A method of microwave integrated circuit on-chip inductor and transformer are realized with transmission line |
| CN110197021B (en) * | 2019-05-21 | 2023-01-31 | 清华大学深圳研究生院 | Method for realizing inductor and transformer on microwave integrated circuit chip by using transmission line |
| CN114026740A (en) * | 2019-06-27 | 2022-02-08 | 华为技术有限公司 | Low-cost filter |
| CN111682850A (en) * | 2020-06-29 | 2020-09-18 | 中国人民解放军空军工程大学 | Simplified left-right-hand composite transmission line unit and ultra-wideband phase shifter |
| CN111682850B (en) * | 2020-06-29 | 2022-12-30 | 中国人民解放军空军工程大学 | Simplified left-right-hand composite transmission line unit and ultra-wideband phase shifter |
| CN112490612A (en) * | 2020-11-02 | 2021-03-12 | 许昌学院 | Single-negative metamaterial heterojunction with slits loaded on two sides based on coplanar waveguide |
| CN113285194A (en) * | 2021-05-28 | 2021-08-20 | 安徽华东光电技术研究所有限公司 | Miniaturized wide-suppression-band low-pass microstrip filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101246983B (en) | 2012-08-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101246983B (en) | Ultra-wideband filter based on simplified left hand transmission line structure | |
| CN101986457A (en) | Stepped impedance resonator load-based stepped impedance ultra-wideband filter | |
| CN102544653B (en) | Microwave four-frequency band pass filter | |
| CN100566147C (en) | Can suppress the small wide-frequency filter that the wireless LAN communication signal disturbs | |
| CN203631707U (en) | Reconfigurable wave trapping frequency band type ultra wide band band-pass filter based on cross-shaped resonator | |
| CN201820868U (en) | Ultra-wideband (UWB) band-pass filter using loaded stepped impedance resonator | |
| CN104659450A (en) | Broadband differential band-pass filter based on cross resonator | |
| CN100435409C (en) | Super wide band microstrip filter | |
| CN203644915U (en) | Double-trap frequency-band UWB (ultra wide band) band-pass filter based on cross resonator | |
| CN104134836B (en) | A kind of plane duplexer based on quarter-wave short-circuited feeder | |
| CN109273806A (en) | Miniaturization low-pass filter based on hexagonal T-type resonator | |
| CN101692512B (en) | Ultra wide band bandpass filter based on ground defective grounding structure | |
| CN106129556B (en) | Short-section line type LTCC ultra-wideband band-pass filter | |
| CN109638395B (en) | Microstrip ultra wide band pass filter | |
| CN203644913U (en) | Trapped-wave frequency-band ultra-wide band-pass filter based on terminal-short-circuit cross resonator | |
| CN103346373A (en) | Lumped-parameter broadband 180-degree coupler | |
| CN201503899U (en) | Ultra-wide-band band-pass filter based on ground defective grounding structure | |
| CN207883884U (en) | A kind of ultra-wide stopband Microstrip Low-Pass | |
| CN202534756U (en) | Compact type dual mode open circuit loop band pass filter | |
| CN101916891A (en) | Ultra-wideband band-pass filter with band stop characteristic | |
| CN114256573B (en) | Microstrip low-pass filter and design method thereof | |
| CN204333184U (en) | Based on the compact bimodulus microstrip filter of E type resonator and T-shaped feeder line | |
| CN204333183U (en) | Based on the compact bimodulus Wide stop bands filter of E type resonator and T-shaped feeder line | |
| CN204333185U (en) | Based on the compact double-mode double-band microstrip filter of E type resonator | |
| CN204333181U (en) | Double-mode double-band filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20130317 |