CN103997310A - Serial-parallel resonance filter of novel structure - Google Patents
Serial-parallel resonance filter of novel structure Download PDFInfo
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- CN103997310A CN103997310A CN201410226477.1A CN201410226477A CN103997310A CN 103997310 A CN103997310 A CN 103997310A CN 201410226477 A CN201410226477 A CN 201410226477A CN 103997310 A CN103997310 A CN 103997310A
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Abstract
The invention discloses a serial-parallel resonance filter of a novel structure. The serial-parallel resonance filter comprises an input/output interface suitable for surface mounting and four resonance units achieving the novel serial-parallel structure. The components are achieved by adopting the multi-layer low temperature co-fired ceramic process technology. The serial-parallel resonance filter has the advantages of being wide in frequency coverage range, small in insertion loss, light in weight, small in size, high in reliability, good in electrical property, good in temperature stability, good in electrical property batch uniformity, low in cost, suitable for mass production and the like, is suitable for occasions of communication of corresponding microwave frequency bands, digital radar, wireless communication hand-held terminals and the like with high requirements for the size, the electrical property, the temperature stability and the reliability, and is suitable for corresponding systems.
Description
Technical field
The present invention relates to the series parallel resonance filter of a kind of filter, particularly a kind of new structure.
Background technology
In recent years, along with microminiaturized the developing rapidly of mobile communication, satellite communication and Defensive Avionics System, high-performance, low cost and miniaturization have become the developing direction of microwave current/RF application, and performance, size, reliability and cost to microwave filter are all had higher requirement.In the systems such as modern wireless communication systems and microwave and millimeter wave communication, radar, need to use very low frequency range working frequency range,, in some national defence tip device, be particularly to ensure systematic function, particularly harsh to filter electrical property and dimensional requirement thereof.The band pass filter that is applicable to ultralow frequency range is the crucial electronic unit in this wave band reception and transmitting branch, and the leading indicator of describing this component capabilities has: passband operating frequency range, stop-band frequency scope, passband insertion loss, stopband attenuation, passband input/output voltage standing-wave ratio, insertion phase shift and delay/frequency characteristic, temperature stability, volume, weight, reliability etc.
LTCC is a kind of Electronic Encapsulating Technology, adopts multi-layer ceramics technology, passive component can be built in to medium substrate inside, also active element can be mounted on to substrate surface and make passive/active integrated functional module simultaneously.LTCC technology all shows many merits at aspects such as cost, integration packaging, wiring live width and distance between centers of tracks, Low ESR metallization, design diversity and flexibility and high frequency performances, has become the mainstream technology of passive integration.The advantages such as it has high Q value, is convenient to embedded passive device, and thermal diffusivity is good, and reliability is high, high temperature resistant, punching shake, utilize LTCC technology, can well process size little, and precision is high, and tight type is good, the microwave device that loss is little.Because LTCC technology has the integrated advantage of 3 D stereo, be widely used for manufacturing various microwave passive elements at microwave frequency band, the height of realizing passive component is integrated.Based on the stack technology of LTCC technique, can realize three-dimensional integrated, thereby make that various micro microwave filters have that size is little, lightweight, performance is excellent, reliability is high, the plurality of advantages such as batch production performance high conformity and low cost, utilize its three-dimensional integrated morphology feature, can realize the series parallel resonance filter of new structure.
Summary of the invention
The object of the present invention is to provide and a kind ofly use that new structure realizes that volume is little, lightweight, reliability is high, electrical property is excellent, simple in structure, rate of finished products is high, high conformity, cost is low, temperature performance is stable new structure series parallel resonance filter in batches.
The technical scheme that realizes the object of the invention is: a kind of series parallel resonance filter of new structure, comprises surface-pasted 50 ohmage input port P1, Part I parallel resonance unit L1, C1, first zero capacitor C 11, Part II series resonance unit L2, C2, the second minimum capacity C22, Part III parallel resonance unit L3, C3, the 3rd minimum capacity C33, Part IV series resonance unit L4, C4, the 4th minimum capacity C44, surface-pasted 50 ohmage output port P2; Wherein Part I parallel resonance unit L1, C1, Part II series resonance unit L2, C2, Part III parallel resonance unit L3, C3, Part IV series resonance unit L4, the parallel placement of C4, input port P1 is connected with Part I parallel resonance unit L1, C1, wherein Part I parallel resonance capacitor C 1 is in parallel with Part I parallel resonant inductor L1, its position is placed on parallel resonant inductor below, first zero capacitor C 11 ground connection of connecting with Part I parallel resonance unit L1, C1; Part II series resonance unit L2, C2 are connected with input port P1, wherein Part II series resonance capacitor C 2 is connected with Part II series resonance inductor L2, its position is placed on Part II series resonance inductor below, and the second minimum capacity C22 is in parallel with Part II series resonance unit L2, C2; Part III parallel resonance unit L3, C3 are connected with Part II series resonance capacitor C 2, wherein Part III parallel resonance capacitor C 2 is in parallel with Part III parallel resonant inductor L3, its position is placed on the 3rd parallel resonant inductor top, the 3rd minimum capacity C33 ground connection of connecting with Part III parallel resonance unit L3, C3; Part IV series resonance unit L4, C4 are connected with Part II series resonance capacitor C 2, wherein Part IV series resonance capacitor C 4 is connected with Part IV series resonance inductor L4, its position is placed on Part IV series resonance inductor top, and the 4th minimum capacity C44 is in parallel with Part IV series resonance unit L4, C4.
Compared with prior art, due to the present invention adopt low-loss low-temperature co-burning ceramic material and 3 D stereo integrated, the remarkable advantage bringing is: in (1) band, in smooth, passband, Insertion Loss is low; (2) filter sideband is precipitous; (3) volume is little, lightweight, reliability is high; (4) circuit implementation structure is simple, can realize production in enormous quantities; (5) cost is low; (6) easy to install and use, can use full-automatic chip mounter to install and welding.
Brief description of the drawings
Fig. 1 is profile and the internal structure schematic diagram of the series parallel resonance filter of a kind of new structure of the present invention.
Fig. 2 is the amplitude-versus-frequency curve of the series parallel resonance filter output of a kind of new structure of the present invention.
Fig. 3 is the stationary wave characteristic curve of the series parallel resonance filter input end mouth of a kind of new structure of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
In conjunction with Fig. 1, the series parallel resonance filter of a kind of new structure of the present invention, this filter is made up of a kind of parallel resonance unit of new structure and a kind of series resonance unit of new structure.This minisize band-pass filter comprises surface-pasted 50 ohmage input port P1, Part I parallel resonance unit L1, C1, first zero capacitor C 11, Part II series resonance unit L2, C2, the second minimum capacity C22, Part III parallel resonance unit L3, C3, the 3rd minimum capacity C33, Part IV series resonance unit L4, C4, the 4th minimum capacity C44, surface-pasted 50 ohmage output port P2; Wherein Part I parallel resonance unit L1, C1, Part II series resonance unit L2, C2, Part III parallel resonance unit L3, C3, Part IV series resonance unit L4, the parallel placement of C4, input port P1 is connected with Part I parallel resonance unit L1, C1, wherein Part I parallel resonance capacitor C 1 is in parallel with Part I parallel resonant inductor L1, its position is placed on parallel resonant inductor below, first zero capacitor C 11 ground connection of connecting with Part I parallel resonance unit L1, C1; Part II series resonance unit L2, C2 are connected with input port P1, wherein Part II series resonance capacitor C 2 is connected with Part II series resonance inductor L2, its position is placed on Part II series resonance inductor below, and the second minimum capacity C22 is in parallel with Part II series resonance unit L2, C2; Part III parallel resonance unit L3, C3 are connected with Part II series resonance capacitor C 2, wherein Part III parallel resonance capacitor C 2 is in parallel with Part III parallel resonant inductor L3, its position is placed on the 3rd parallel resonant inductor top, the 3rd minimum capacity C33 ground connection of connecting with Part III parallel resonance unit L3, C3; Part IV series resonance unit L4, C4 are connected with Part II series resonance capacitor C 2, wherein Part IV series resonance capacitor C 4 is connected with Part IV series resonance inductor L4, its position is placed on Part IV series resonance inductor top, and the 4th minimum capacity C44 is in parallel with Part IV series resonance unit L4, C4.
In conjunction with Fig. 1, the series parallel resonance filter of a kind of new structure of the present invention, comprises that surface-pasted 50 ohmage input port P1, Part I parallel resonance unit L1, C1, first zero capacitor C 11, Part II series resonance unit L2, C2, the second minimum capacity C22, Part III parallel resonance unit L3, C3, the 3rd minimum capacity C33, Part IV series resonance unit L4, C4, the 4th minimum capacity C44, surface-pasted 50 ohmage output port P2 and earth terminal all adopt multilayer LTCC technique to realize.
In conjunction with Fig. 1, the series parallel resonance filter of a kind of new structure of the present invention, in the design of transmission zero, adopt first zero capacitor C 11 and the ground connection of connecting at Part I parallel resonance unit L1 C1, adopt the second minimum capacity C22 in parallel with Part II series resonance unit L2, C2, adopt the 3rd minimum capacity C33 ground connection of connecting with Part III parallel resonance unit L3, C3, adopt the 4th minimum capacity C44 in parallel with Part IV series resonance unit L4, C4, produce respectively transmission zero thereby can on top be with lower sideband.By adjusting size, the position of four minimum capacities, can change the position of transmission zero.
A kind of series parallel resonance filter of new structure, because being adopts multilayer LTCC technique to realize, its low-temperature co-burning ceramic material and metallic pattern sintering at about 900 DEG C of temperature forms, so there is extreme high reliability and temperature stability, because structure adopts, 3 D stereo is integrated to be grounded and to encapsulate with multilayer folding structure and outer surface metallic shield, thereby volume is significantly reduced.
The size of the series parallel resonance filter of a kind of new structure of the present invention is only 8mm × 6mm × 2.3mm, its performance can be found out from Fig. 2, Fig. 3, pass band width is 30MHz ~ 50MHz, in passband, minimum insertion loss is 1.1dB, input port return loss is all better than 15dB, upper sideband suppresses to be better than 25dB, and lower sideband suppresses to be better than 30dB, and input port standing-wave ratio is better than 1.4.This filter is compared with other existing filters, and its centre frequency is lower, and volume is less.
Claims (2)
1. a series parallel resonance filter for new structure, is characterized in that: comprise surface-pasted 50 ohmage input ports (P1), Part I parallel resonance unit (L1, C1), first zero electric capacity (C11), Part II series resonance unit (L2, C2), the second minimum capacity (C22), Part III parallel resonance unit (L3, C3), the 3rd minimum capacity (C33), Part IV series resonance unit (L4, C4), the 4th minimum capacity (C44), surface-pasted 50 ohmage output ports (P2), Part I parallel resonance unit (L1, C1), Part II series resonance unit (L2, C2), Part III parallel resonance unit (L3, C3), Part IV series resonance unit (L4, C4) parallel placement, input port (P1) and Part I parallel resonance unit (L1, C1) connect, wherein Part I parallel resonance electric capacity (C1) is in parallel with Part I parallel resonant inductor (L1), its position is placed on Part I parallel resonant inductor (L1) below, first zero electric capacity (C11) and Part I parallel resonance unit (L1, C1) series connection ground connection, Part II series resonance unit (L2, C2) is connected with input port (P1), wherein Part II series resonance electric capacity (C2) is connected with Part II series resonance inductor (L2), its position is placed on Part II series resonance inductor (L2) below, and the second minimum capacity (C22) is in parallel with Part II series resonance unit (L2, C2), Part III parallel resonance unit (L3, C3) is connected with Part II series resonance electric capacity (C2), wherein Part III parallel resonance electric capacity (C2) is in parallel with Part III parallel resonant inductor (L3), its position is placed on the 3rd parallel resonant inductor (L3) top, the 3rd minimum capacity (C33) and Part III parallel resonance unit (L3, the C3) ground connection of connecting, Part IV series resonance unit (L4, C4) is connected with Part II series resonance electric capacity (C2), wherein Part IV series resonance electric capacity (C4) is connected with Part IV series resonance inductor (L4), its position is placed on Part IV series resonance inductor (L4) top, and the 4th minimum capacity (C44) is in parallel with Part IV series resonance unit (L4, C4).
2. the series parallel resonance filter of new structure according to claim 1, it is characterized in that: surface-pasted 50 ohmage input ports (P1), Part I parallel resonance unit (L1, C1), first zero electric capacity (C11), Part II series resonance unit (L2, C2), the second minimum capacity (C22), Part III parallel resonance unit (L3, C3), the 3rd minimum capacity (C33), Part IV series resonance unit (L4, C4), the 4th minimum capacity (C44), surface-pasted 50 ohmage output ports (P2) and earth terminal all adopt multilayer LTCC technique to realize.
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| CN201410226477.1A CN103997310A (en) | 2014-05-26 | 2014-05-26 | Serial-parallel resonance filter of novel structure |
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| CN201410226477.1A CN103997310A (en) | 2014-05-26 | 2014-05-26 | Serial-parallel resonance filter of novel structure |
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| CN103997310A true CN103997310A (en) | 2014-08-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393853A (en) * | 2014-11-13 | 2015-03-04 | 南京波而特电子科技有限公司 | Multilayer band-pass filter of novel resonance structure |
| CN105024123A (en) * | 2015-08-07 | 2015-11-04 | 南京理工大学 | High-performance filter bank based on LTCC lumped and semi-lumped structure |
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| JP2002280853A (en) * | 2001-03-16 | 2002-09-27 | Tdk Corp | Apc circuit for high frequency power amplifier |
| CN101621146A (en) * | 2009-08-11 | 2010-01-06 | 南京理工大学 | L wave band miniature duplexer |
| CN101621144A (en) * | 2009-08-11 | 2010-01-06 | 南京理工大学 | Miniature filter with low loss, high stop band and multi-zero suppression |
| CN102509829A (en) * | 2011-10-27 | 2012-06-20 | 无锡南理工科技发展有限公司 | Miniature C-band band-pass filter with low insertion loss and excellent high-order harmonic suppression |
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2014
- 2014-05-26 CN CN201410226477.1A patent/CN103997310A/en active Pending
Patent Citations (4)
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| JP2002280853A (en) * | 2001-03-16 | 2002-09-27 | Tdk Corp | Apc circuit for high frequency power amplifier |
| CN101621146A (en) * | 2009-08-11 | 2010-01-06 | 南京理工大学 | L wave band miniature duplexer |
| CN101621144A (en) * | 2009-08-11 | 2010-01-06 | 南京理工大学 | Miniature filter with low loss, high stop band and multi-zero suppression |
| CN102509829A (en) * | 2011-10-27 | 2012-06-20 | 无锡南理工科技发展有限公司 | Miniature C-band band-pass filter with low insertion loss and excellent high-order harmonic suppression |
Non-Patent Citations (1)
| Title |
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| 丁世敏: "基于LTCC技术双零点带通滤波器的研究", 《电子科技》, vol. 23, no. 8, 15 August 2010 (2010-08-15), pages 65 - 67 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393853A (en) * | 2014-11-13 | 2015-03-04 | 南京波而特电子科技有限公司 | Multilayer band-pass filter of novel resonance structure |
| CN105024123A (en) * | 2015-08-07 | 2015-11-04 | 南京理工大学 | High-performance filter bank based on LTCC lumped and semi-lumped structure |
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| CB03 | Change of inventor or designer information |
Inventor after: Dai Yongsheng Inventor after: Yang Maoya Inventor after: Zhou Wei Inventor after: Zhou Yanfang Inventor after: Chen Xiangzhi Inventor after: Li Yan Inventor after: Zhu Dan Inventor after: Luo Ming Inventor after: Zhang Chao Inventor after: Pan Hang Inventor after: Li Yongshuai Inventor after: Xu Xinying Inventor before: Chen Xiangzhi Inventor before: Yang Maoya Inventor before: Zhou Wei Inventor before: Zhou Yanfang Inventor before: Li Yan Inventor before: Zhu Dan Inventor before: Luo Ming Inventor before: Dai Yongsheng Inventor before: Zhang Chao Inventor before: Pan Hang Inventor before: Li Yongshuai Inventor before: Xu Xinying |
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Free format text: CORRECT: INVENTOR; FROM: CHEN XIANGZHI LI YAN ZHU DAN LUO MING DAI YONGSHENG ZHANG CHAO PAN HANG LI YONGSHUAI XU XINYING YANG MAOYA ZHOU WEI ZHOU YANFANG TO: DAI YONGSHENG CHEN XIANGZHI LI YAN ZHU DAN LUO MING ZHANG CHAO PAN HANG LI YONGSHUAI XU XINYING YANG MAOYA ZHOU WEI ZHOU YANFANG |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140820 |
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| RJ01 | Rejection of invention patent application after publication |