CN103985929B - A kind of high suppression module minisize band-pass filter - Google Patents
A kind of high suppression module minisize band-pass filter Download PDFInfo
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- CN103985929B CN103985929B CN201410195628.1A CN201410195628A CN103985929B CN 103985929 B CN103985929 B CN 103985929B CN 201410195628 A CN201410195628 A CN 201410195628A CN 103985929 B CN103985929 B CN 103985929B
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Abstract
The invention discloses a kind of high suppression module minisize band-pass filter, including being applicable to surface-pasted input/output interface, two the parallel resonance unit modules realized with strip lines configuration, said structure all uses multilamellar LTCC Technology to realize.The present invention has that frequency coverage is wide, Insertion Loss is little, lightweight, volume is little, reliability is high, good electrical property, design is quick and is simple to manufacture, the advantages such as yield rate is high, performance is excellent, it is adaptable to volume, electrical property, temperature stability and reliability are had in occasion and the corresponding system of rigors by the corresponding communication of microwave frequency band, digital radar, radio communication handheld terminal etc..
Description
Technical field
The present invention relates to a kind of wave filter, a kind of high suppression module minisize band-pass filter.
Background technology
In recent years, the developing rapidly of miniaturization along with mobile communication, satellite communication and Defensive Avionics System, high-performance, low cost and miniaturization have become as the developing direction of microwave current/RF application, all have higher requirement performance, size, reliability and the cost of microwave filter.In the systems such as modern wireless communication systems and microwave and millimeter wave communication, radar, when system is used the wave filter that multiple mid frequency closes on, for reducing interfering between neighboring trace, need filter stop bend suppression the highest, particularly in some national defence tip device, for ensureing systematic function, the harshest to wave filter electrical property and dimensional requirement thereof.High stop-band restraining microwave intermediate frequency band pass filter is the critical electronic parts in this band reception and transmitting branch, describe this component capabilities refer mainly to indicate: passband operating frequency range, stop band frequency range, pass band insertion loss, stopband attenuation, passband input/output voltage standing-wave ratio, insert phase shift and delay/frequency characteristic, temperature stability, volume, weight, reliability etc..
LTCC is a kind of Electronic Encapsulating Technology, uses multi-layer ceramics technology, it is possible to be built in by passive element inside medium substrate, and active component can also be mounted on substrate surface makes passive/active integrated functional module simultaneously.LTCC technology all shows many merits at cost, integration packaging, wiring live width and distance between centers of tracks, low impedance metal, design diversity and the aspect such as motility and high frequency performance, it has also become the mainstream technology of passive integration.It has high q-factor, it is simple to embedded passive device, and thermal diffusivity is good, and reliability is high, high temperature resistant, rushes the advantages such as shake, utilizes LTCC technology, can well process size little, and precision is high, and tight type is good, and little microwave device is lost.Owing to LTCC technology has the integrated advantage of 3 D stereo, it is widely used for manufacturing various microwave passive components at microwave frequency band, it is achieved passive element highly integrated.Stack technology based on LTCC technique, can realize three-dimensionally integrated, so that various micro microwave filters have, size is little, lightweight, performance is excellent, reliability is high, performance concordance is good and the plurality of advantages such as low cost in batch production, utilize its three-dimensionally integrated construction features, it is possible to achieve there is the LTCC wave filter of sideband precipitous high stop band rejection.
Summary of the invention
It is an object of the invention to provide a kind of use concatenation technology to realize volume is little, lightweight, reliability is high, excellent electrical property, simple in construction, yield rate high, design is quick and is simple to manufacture, the minisize band-pass filter that yield rate is high, performance is excellent.
The technical scheme realizing the object of the invention is: a kind of high suppression module minisize band-pass filter, it is characterised in that: include that surface-pasted 50 ohmage input port P1, input inductance Lin, the first parallel resonance module U1, series coupled connect inductance L45, the second parallel resonance module U2, outputting inductance Lout, surface-pasted 50 ohmage output port P2；First parallel resonance module U1 is made up of first order parallel resonance unit L1, C1, second level parallel resonance unit L2, C2, third level parallel resonance unit L3, C3, fourth stage parallel resonance unit L4, C4, the first Z-shaped interstage coupling strip line LC1.Second parallel resonance module U2 is made up of level V parallel resonance unit L5, C5, the 6th grade of parallel resonance unit L6, C6, the 7th grade of parallel resonance unit L7, C7, the 8th grade of parallel resonance unit L8, C8, the second Z-shaped interstage coupling strip line LC2；nullFirst parallel resonance module and the second parallel resonance module symmetry，Symmetrical centre is that series coupled connects inductance L45，First parallel resonance module is connected inductance L45 with the second parallel resonance module by series coupled and cascades，In first parallel resonance module，First order parallel resonance unit L1、C1、Second level parallel resonance unit L2、C2、Third level parallel resonance unit L3、C3、Fourth stage parallel resonance unit L4、C4 is two-layer，And every layer all at same plane，First order parallel resonance unit L1、C1 is by ground floor strip line C1、Second layer strip line L1 is formed in parallel，Second level parallel resonance unit L2、C2 is by ground floor strip line C2、Second layer strip line L2 is formed in parallel，Third level parallel resonance unit L3、C3 is by ground floor strip line C3、Second layer strip line L3 is formed in parallel，Fourth stage parallel resonance unit L4、C4 is by ground floor strip line C4、Second layer strip line L4 is formed in parallel；In second parallel resonance module, level V parallel resonance unit L5, C5, the 6th grade of parallel resonance unit, the 7th grade of parallel resonance unit L7, C7, the 8th grade of parallel resonance unit L8, C8 all with the first parallel resonance module symmetry；Input port P1 is connected with the second layer strip line L1 in first order parallel resonance unit by input inductance Lin, and output port P2 is connected by the second layer strip line L8 in outputting inductance Lout and the 8th grade of parallel resonance unit；Described first order parallel resonance unit L1, C1, second level parallel resonance unit L2, C2, third level parallel resonance unit L3, C3, fourth stage parallel resonance unit L4, C4, level V parallel resonance unit L5, C5, the 7th grade of parallel resonance unit L7, C7 ground connection respectively, the 8th grade of parallel resonance unit L8, C8 ground connection respectively.Wherein ground floor all strip lines earth terminal is identical, one end ground connection, and the other end is opened a way, and second layer strip line earth terminal is identical, one end ground connection, and the other end is opened a way, and earth terminal direction is contrary with ground floor earth terminal.First Z-shaped interstage coupling strip line LC1, the first equal ground connection in Z-shaped interstage coupling strip line LC2 two ends.
Compared with prior art, owing to the present invention uses low-loss low-temperature co-burning ceramic material and 3 D stereo integrated, the remarkable advantage brought is: in (1) band, in smooth, passband, Insertion Loss is low；(2) wave filter sideband is precipitous；(3) volume is little, lightweight, reliability is high；(4) excellent electrical property, stopband suppression height；(5) circuit realiration simple in construction, can realize producing in enormous quantities；(6) design is quick and is simple to manufacture；(7) easy to install and use, it is possible to use full-automatic chip mounter is installed and welding.
Accompanying drawing explanation
Fig. 1 is profile and the internal structure schematic diagram of a kind of high suppression module minisize band-pass filter of the present invention.
Fig. 2 is the amplitude-versus-frequency curve of a kind of high suppression module minisize band-pass filter outfan of the present invention.
Fig. 3 is the phase-frequency characteristic curve of a kind of high suppression module minisize band-pass filter of the present invention.
Fig. 4 is the stationary wave characteristic curve of a kind of high suppression module minisize band-pass filter input port of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail.
In conjunction with Fig. 1, a kind of high suppression module minisize band-pass filter of the present invention, this minisize band-pass filter includes that surface-pasted 50 ohmage input port P1, input inductance Lin, the first parallel resonance module U1, series coupled connect inductance L45, the second parallel resonance module U2, outputting inductance Lout, surface-pasted 50 ohmage output port P2；First parallel resonance module U1 is made up of first order parallel resonance unit L1, C1, second level parallel resonance unit L2, C2, third level parallel resonance unit L3, C3, fourth stage parallel resonance unit L4, C4, the first Z-shaped interstage coupling strip line LC1.Second parallel resonance module U2 is made up of level V parallel resonance unit L5, C5, the 6th grade of parallel resonance unit L6, C6, the 7th grade of parallel resonance unit L7, C7, the 8th grade of parallel resonance unit L8, C8, the second Z-shaped interstage coupling strip line LC2；nullFirst parallel resonance module and the second parallel resonance module symmetry，Symmetrical centre is that series coupled connects inductance L45，First parallel resonance module is connected inductance L45 with the second parallel resonance module by series coupled and cascades，In first parallel resonance module，First order parallel resonance unit L1、C1、Second level parallel resonance unit L2、C2、Third level parallel resonance unit L3、C3、Fourth stage parallel resonance unit L4、C4 is two-layer，And every layer all at same plane，First order parallel resonance unit L1、C1 is by ground floor strip line C1、Second layer strip line L1 is formed in parallel，Second level parallel resonance unit L2、C2 is by ground floor strip line C2、Second layer strip line L2 is formed in parallel，Third level parallel resonance unit L3、C3 is by ground floor strip line C3、Second layer strip line L3 is formed in parallel，Fourth stage parallel resonance unit L4、C4 is by ground floor strip line C4、Second layer strip line L4 is formed in parallel；In second parallel resonance module, level V parallel resonance unit L5, C5, the 6th grade of parallel resonance unit, the 7th grade of parallel resonance unit L7, C7, the 8th grade of parallel resonance unit L8, C8 all with the first parallel resonance module symmetry；Input port P1 is connected with the second layer strip line L1 in first order parallel resonance unit by input inductance Lin, and output port P2 is connected by the second layer strip line L8 in outputting inductance Lout and the 8th grade of parallel resonance unit；Described first order parallel resonance unit L1, C1, second level parallel resonance unit L2, C2, third level parallel resonance unit L3, C3, fourth stage parallel resonance unit L4, C4, level V parallel resonance unit L5, C5, the 7th grade of parallel resonance unit L7, C7 ground connection respectively, the 8th grade of parallel resonance unit L8, C8 ground connection respectively.Wherein ground floor all strip lines earth terminal is identical, one end ground connection, and the other end is opened a way, and second layer strip line earth terminal is identical, one end ground connection, and the other end is opened a way, and earth terminal direction is contrary with ground floor earth terminal.First Z-shaped interstage coupling strip line LC1, the first equal ground connection in Z-shaped interstage coupling strip line LC2 two ends.
In conjunction with Fig. 1, a kind of high suppression module minisize band-pass filter of the present invention, connects inductance L45, the second parallel resonance module U2, outputting inductance Lout, surface-pasted 50 ohmage output port P2 and earth terminal all use multilamellar LTCC technique to realize including surface-pasted 50 ohmage input port P1, input inductance Lin, the first parallel resonance module U1, series coupled.
In conjunction with Fig. 1, a kind of high suppression module minisize band-pass filter of the present invention, in the design of transmission zero, the first Z-shaped interstage coupling strip line LC1 is used to introduce cross-couplings between first order parallel resonance unit L1 C1 and fourth stage parallel resonance unit L4 C4, such that it is able on top band and lower sideband produce transmission zero respectively.By adjusting the size of Z-shaped interstage coupling strip line, position, thus it is possible to vary the position of transmission zero.
A kind of high suppression module minisize band-pass filter, owing to being employing multilamellar LTCC technique realization, its low-temperature co-burning ceramic material and metallic pattern sinter at a temperature of about 900 DEG C and form, so having extreme high reliability and temperature stability, owing to structure uses, 3 D stereo is integrated to be grounded and encapsulates with multilayer folding structure and outer surface metallic shield, so that volume significantly reduces.
The size of a kind of high suppression module minisize band-pass filter of the present invention is only 6.1mm × 2.5mm × 1.5mm, its performance can be found out from Fig. 2, Fig. 3, Fig. 4, pass band width is 3.1GHz ~ 3.4GHz, in passband, minimum insertion loss is 2.64dB, input port return loss is superior to 20dB, and upper side band suppression is better than 60dB, and lower sideband suppression is better than 60dB, compared with other existing wave filter, 60dB is higher in its suppression.Port phase frequency linearly changes, and input port standing-wave ratio is better than 1.3.
Claims (1)
1. one kind high suppression module minisize band-pass filter, it is characterised in that: include that surface-pasted 50 ohmage input ports (P1), input inductance (Lin), the first parallel resonance module (U1), series coupled connect inductance (L45), the second parallel resonance module (U2), outputting inductance (Lout), surface-pasted 50 ohmage output ports (P2)；First parallel resonance module (U1) is made up of first order parallel resonance unit (L1, C1), second level parallel resonance unit (L2, C2), third level parallel resonance unit (L3, C3), fourth stage parallel resonance unit (L4, C4), the first Z-shaped interstage coupling strip line (LC1)；Second parallel resonance module (U2) is made up of level V parallel resonance unit (L5, C5), the 6th grade of parallel resonance unit (L6, C6), the 7th grade of parallel resonance unit (L7, C7), the 8th grade of parallel resonance unit (L8, C8), the second Z-shaped interstage coupling strip line (LC2)；First parallel resonance module (U1) is symmetrical with the second parallel resonance module (U2), symmetrical centre is that series coupled connects inductance (L45), and the first parallel resonance module (U1) is connected inductance (L45) with the second parallel resonance module (U2) by series coupled and cascades；nullIn first parallel resonance module (U1)，First order parallel resonance unit (L1、C1)、Second level parallel resonance unit (L2、C2)、Third level parallel resonance unit (L3、C3)、Fourth stage parallel resonance unit (L4、C4) it is two-layer，And every layer all at same plane，First order parallel resonance unit (L1、C1) by ground floor strip line (C1)、Second layer strip line (L1) is formed in parallel，Second level parallel resonance unit (L2、C2) by ground floor strip line (C2)、Second layer strip line (L2) is formed in parallel，Third level parallel resonance unit (L3、C3) by ground floor strip line (C3)、Second layer strip line (L3) is formed in parallel，Fourth stage parallel resonance unit (L4、C4) by ground floor strip line (C4)、Second layer strip line (L4) is formed in parallel；In second parallel resonance module (U2), level V parallel resonance unit (L5, C5), the 6th grade of parallel resonance unit (L6, C6), the 7th grade of parallel resonance unit (L7, C7), the 8th grade of parallel resonance unit (L8, C8) are all symmetrical with the first parallel resonance module (U1)；Input port (P1) is connected with the second layer strip line (L1) in first order parallel resonance unit (L1, C1) by input inductance (Lin), and output port (P2) is connected with the second layer strip line (L8) in the 8th grade of parallel resonance unit (L8, C8) by outputting inductance (Lout)；Described first order parallel resonance unit (L1, C1), second level parallel resonance unit (L2, C2), third level parallel resonance unit (L3, C3), fourth stage parallel resonance unit (L4, C4), level V parallel resonance unit (L5, C5), the 7th grade of parallel resonance unit (L7, C7) ground connection respectively, the 8th grade of parallel resonance unit (L8, C8) ground connection respectively；Wherein ground floor all strip lines earth terminal is identical, one end ground connection, and the other end is opened a way, and second layer strip line earth terminal is identical, one end ground connection, and the other end is opened a way, and earth terminal direction is contrary with ground floor earth terminal；First Z-shaped interstage coupling strip line (LC1), the first equal ground connection in Z-shaped interstage coupling strip line (LC2) two ends；Surface-pasted 50 ohmage input ports (P1), input inductance (Lin), the first parallel resonance module (U1), series coupled connect inductance (L45), the second parallel resonance module (U2), outputting inductance (Lout), surface-pasted 50 ohmage output ports (P2) and earth terminal and all use multilamellar LTCC technique to realize；Input port (P1) is connected with the second layer strip line (L1) in first order parallel resonance unit by input inductance (Lin), and output port (P2) is connected with the second layer strip line (L8) in the 8th grade of parallel resonance unit by outputting inductance (Lout).
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| CN104201444B (en) * | 2014-08-26 | 2016-07-06 | 南京理工大学 | How orthogonal a kind of microwave and millimeter wave is active from load inverse filter |
| CN104201445B (en) * | 2014-08-26 | 2016-07-06 | 南京理工大学 | A kind of active how orthogonal inverse filter of outer load of microwave and millimeter wave |
| CN104733814B (en) * | 2014-09-13 | 2018-01-05 | 南京理工大学 | The miniature self-supported I/Q orthogonal filters of double microwave and millimeter waves |
| CN111029692A (en) * | 2019-11-25 | 2020-04-17 | 南京理工大学 | Novel absorption formula band pass filter based on LTCC |
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| JPH07202533A (en) * | 1993-11-16 | 1995-08-04 | Korea Electron Telecommun | High-temperature superconducting microwave bandpass filter and its manufacture |
| CN102594283A (en) * | 2012-03-22 | 2012-07-18 | 南京理工大学常熟研究院有限公司 | Stop-band high-suppression cascade band-pass filter |
| CN103457007A (en) * | 2013-09-06 | 2013-12-18 | 南京理工大学 | High-performance distributed 3100-3400 MHz miniature band-pass filter |
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| JP5300865B2 (en) * | 2008-11-26 | 2013-09-25 | 京セラ株式会社 | BANDPASS FILTER, RADIO COMMUNICATION MODULE AND RADIO COMMUNICATION DEVICE USING THE SAME |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07202533A (en) * | 1993-11-16 | 1995-08-04 | Korea Electron Telecommun | High-temperature superconducting microwave bandpass filter and its manufacture |
| CN102594283A (en) * | 2012-03-22 | 2012-07-18 | 南京理工大学常熟研究院有限公司 | Stop-band high-suppression cascade band-pass filter |
| CN103457007A (en) * | 2013-09-06 | 2013-12-18 | 南京理工大学 | High-performance distributed 3100-3400 MHz miniature band-pass filter |
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