CN102610881A - Ultra-wideband micro band rejection filter - Google Patents
Ultra-wideband micro band rejection filter Download PDFInfo
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- CN102610881A CN102610881A CN2012100778428A CN201210077842A CN102610881A CN 102610881 A CN102610881 A CN 102610881A CN 2012100778428 A CN2012100778428 A CN 2012100778428A CN 201210077842 A CN201210077842 A CN 201210077842A CN 102610881 A CN102610881 A CN 102610881A
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Abstract
The invention relates to an ultra-wideband micro band rejection filter, comprising an input/output interface suitable for pasting on a surface, five parallel resonance units and four series resonance units, the structure is implemented by multi-layer low-temperature co-fired ceramic technology. According to the invention, the ultra-wideband micro band rejection filter has the advantages of wide frequency coverage, small insertion loss, light weight, small volume, high reliability, good electrical property, good phase frequency characteristic linearity, good temperature stability, good batch consistency of electrical property, low cost and mass production; therefore, the ultra-wideband micro band rejection filter is particularly suitable for fields such as communication for corresponding microwave frequency range, a digital radar and a wireless communication hand-held terminal which have excessive demands on volume, electrical proper, temperature stability and reliability, and corresponding systems.
Description
Technical field
The present invention relates to a kind of filter, the miniature band stop filter of particularly a kind of ultra broadband.
Background technology
Development along with systems such as microwave and millimeter wave communication, radars; Especially the continuous miniaturization of microwave and millimeter wave communication module in ambulatory handheld formula wireless communication terminal, individual soldier's satellite mobile communication terminal, military and civilian multimode multiplex communication terminal, airborne, missile-borne, the aerospace communication system; Filter is as the crucial electronic unit in corresponding wave band reception and the transmitting branch, and the ultra broadband microfilter is an one of which important developing direction.The key technical indexes of describing this component capabilities has: stopband operating frequency range, passband frequency range, stopband input/output voltage standing-wave ratio, stopband insert loss, pass band damping, form factor, insertion phase shift and delay/frequency characteristic, temperature stability, volume, weight, reliability etc.With the filter of conventional method design, all there is volume and inserts the bigger shortcoming of loss like lump-shaped media filter construction, metal resonant cavity filter structure and coaxial line filter structure etc., for requiring harsh application scenario often can't use.
Summary of the invention
The object of the present invention is to provide that a kind of volume is little, in light weight, reliability is high, electrical property is excellent, simple in structure, rate of finished products is high, in batches high conformity, cost is low, temperature performance is stable, the miniature microwave band-elimination filter of the ultra broadband of phase-frequency characteristic linear change.
The technical scheme that realizes the object of the invention is: the miniature band stop filter of a kind of ultra broadband; It is characterized in that comprising surface-pasted 50 ohmage input ports, first order parallel resonance unit, first order series resonance unit, parallel resonance unit, the second level, series resonance unit, the second level, third level parallel resonance unit, third level series resonance unit, fourth stage parallel resonance unit, fourth stage series resonance unit, level V parallel resonance unit, surface-pasted 50 ohmage output port and earth terminals; Input port is connected with first order parallel resonance unit; Output port is connected with level V parallel resonance unit, and the other end of first order parallel resonance unit is connected with an end of parallel resonance unit, the second level, first order series resonance unit respectively; Another the series resonance unit, termination second level and the third level parallel resonance unit of parallel resonance unit, the second level, the other end ground connection of first order series resonance unit; The other end ground connection of series resonance unit, the second level, another termination third level series resonance unit and the fourth stage parallel resonance unit of third level parallel resonance unit; The other end ground connection of third level series resonance unit, another termination fourth stage series resonance unit and the level V parallel resonance unit of fourth stage parallel resonance unit; The other end ground connection of fourth stage series resonance unit, another termination output of level V parallel resonance unit, the other end output signal of output port.
Prior art is compared, because the present invention adopts low-loss low-temperature co-burning ceramic material and 3 D stereo integrated, the remarkable advantage that is brought is: suppress high in (1) stopband, the interior Insertion Loss of passband is low; (2) ultra broadband; (3) volume is little, in light weight, reliability is high; (4) electrical property is excellent, the phase-frequency characteristic linear change; (5) the circuit implementation structure is simple, can realize producing in enormous quantities; (6) cost is low; (7) easy to install and use, can use full-automatic chip mounter to install and welding; (8) be specially adapted to etc. in the radio communication handheld terminal, and volume, weight, performance, reliability are had in the harsh communication system that requires.
Description of drawings
Fig. 1 is the electrical schematic diagram of the miniature band stop filter of a kind of ultra broadband of the present invention.
Fig. 2 is the profile and the internal structure sketch map of the miniature band stop filter of a kind of ultra broadband of the present invention.
Fig. 3 is the miniature band stop filter simulation performance of a kind of ultra broadband of a present invention curve.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
In conjunction with Fig. 1, Fig. 2; The present invention is the miniature band stop filter of a kind of ultra broadband, and the miniature band stop filter of this ultra broadband comprises surface-pasted 50 ohmage input port P1, first order parallel resonance unit L1, C1, first order series resonance unit L2, C2, parallel resonance unit, second level L3, C3, series resonance unit, second level L4, C4, third level parallel resonance unit L5, C5, third level series resonance unit L6, C6, fourth stage parallel resonance unit L7, C7, fourth stage series resonance unit L8, C8, level V parallel resonance unit L9, C9, surface-pasted 50 ohmage output port P2 and earth terminals; Input port P1 is connected with first order parallel resonance unit L1, C1; Output port P2 is connected with level V parallel resonance unit L9, C9, and the other end of first order parallel resonance unit L1, C1 is connected with the end of parallel resonance unit, second level L3, C3, first order series resonance unit L2, C2 respectively; Another series resonance unit, termination second level L4, C4 and the third level parallel resonance unit L5 of parallel resonance unit, second level L3, C3, C5, the other end ground connection of first order series resonance unit L2, C2; The other end ground connection of series resonance unit, second level L4, C4, another termination third level series resonance unit L6, C6 and the fourth stage parallel resonance unit L7 of third level parallel resonance unit L5, C5, C7; The other end ground connection of third level series resonance unit L6, C6, another termination fourth stage series resonance unit L8, C8 and the level V parallel resonance unit L9 of fourth stage parallel resonance unit L7, C7, C9; The other end ground connection of fourth stage series resonance unit L8, C8, another termination output P2 of level V parallel resonance unit L9, C9, the other end output signal of output port P2.
In conjunction with Fig. 2, first order parallel resonance unit L1, C1, first order series resonance unit L2, C2, parallel resonance unit, second level L3, C3, series resonance unit, second level L4, C4, third level parallel resonance unit L5, C5, third level series resonance unit L6, C6, fourth stage parallel resonance unit L7, C7, fourth stage series resonance unit L8, C8, level V parallel resonance unit L9, C9 all adopt the strip line of lumped parameter to realize.
The miniature band stop filter of a kind of ultra broadband of the present invention; In conjunction with Fig. 1, Fig. 2; Its operation principle is summarized as follows: when the broadband microwave signal of importing arrives first order parallel resonance unit L1, C1 through input port P1; Near non-first order parallel resonance unit L1, the C1 resonance frequency microwave signal arrives first order series resonance unit L2, C2 and parallel resonance unit, second level L3, C3 common port through first inductance L 1 among first order parallel resonance unit L1, the C1 and first capacitor C 1; All the other signals are reflected, and realize first order filtering; Near non-first order series resonance unit L2, C2 or parallel resonance unit, second level L3, the C3 resonance frequency microwave signal realizes second level filtering through the common port of the 3rd inductance L 3 among parallel resonance unit, second level L3, the C3 and the 3rd capacitor C 3 arrival second level series resonance unit L4, C4 and third level parallel resonance unit L5, C5; Near non-second level series resonance unit L4, C4 or third level parallel resonance unit L5, the C5 resonance frequency microwave signal arrives the common port of third level series resonance unit L6, C6 and fourth stage parallel resonance unit L7, C7 through the 5th inductance L 5 among third level parallel resonance unit L5, the C5 and the 5th capacitor C 5, realizes third level filtering; Near non-third level series resonance unit L6, C6 or fourth stage parallel resonance unit L7, the C7 resonance frequency microwave signal arrives the common port of fourth stage series resonance unit L8, C8 and level V parallel resonance unit L9, C9 through the 7th inductance L 7 among fourth stage parallel resonance unit L7, the C7 and the 7th capacitor C 7, realizes fourth stage filtering; Near non-level V parallel resonance unit L9, the C9 resonance frequency microwave signal arrives 50 ohmage output port P2 of mounted on surface through the 9th inductance L 9 among level V parallel resonance unit L9, the C9 and the 9th capacitor C 9; Realize level V filtering, thereby realize the miniature band stop filter function of ultra broadband.
The miniature band stop filter of a kind of ultra broadband is owing to be to adopt multilayer LTCC technology to realize; Its low-temperature co-burning ceramic material and metallic pattern form at about 900 ℃ of sintering temperatures; So have extreme high reliability and temperature stability; 3 D stereo is integrated to be grounded and to encapsulate with multilayer folding structure and outer surface metallic shield because structure adopts, thereby volume is significantly reduced.
Implementing volume in conjunction with Fig. 2, the miniature band stop filter of a kind of ultra broadband of Fig. 3 is 3.2mm * 2.5mm * 1.2mm.This filter bandwidht is 3350MHz, suppresses all greater than 30 decibels in the simulation filter device stopband, and standing-wave ratio has good performance of filter all less than 1 decibel.
Claims (3)
1. the miniature band stop filter of ultra broadband is characterized in that: comprise surface-pasted 50 ohmage input ports (P1), first order parallel resonance unit (L1, C1), first order series resonance unit (L2, C2), parallel resonance unit, the second level (L3, C3), series resonance unit, the second level (L4, C4), third level parallel resonance unit (L5, C5), third level series resonance unit (L6, C6), fourth stage parallel resonance unit (L7, C7), fourth stage series resonance unit (L8, C8), level V parallel resonance unit (L9, C9), surface-pasted 50 ohmage output ports (P2); Wherein, First order parallel resonance unit (L1, C1) is formed in parallel by first inductance (L1) and first electric capacity (C1); First order series resonance unit (L2, C2) is in series by second inductance (L2) and second electric capacity (C2); Parallel resonance unit, the second level (L3, C3) is formed in parallel by the 3rd inductance (L3) and the 3rd electric capacity (C3); Series resonance unit, the second level (L4, C4) is in series by the 4th inductance (L4) and the 4th electric capacity (C4); Third level parallel resonance unit (L5, C5) is formed in parallel by the 5th inductance (L5) and the 5th electric capacity (C5); Third level series resonance unit (L6, C6) is in series by the 6th inductance (L6) and the 6th electric capacity (C6); Fourth stage parallel resonance unit (L7, C7) is formed in parallel by the 7th inductance (L7) and the 7th electric capacity (C7), and fourth stage series resonance unit (L8, C8) is in series by the 8th inductance (L8) and the 8th electric capacity (C8), and the 9th grade of parallel resonance unit (L9, C9) is formed in parallel by the 9th inductance (L9) and the 9th electric capacity (C9); Input port (P1) is connected with first order parallel resonance unit (L1, C1); Output port (P2) is connected with the 9th grade of parallel resonance unit (L9, C9); Parallelly connected first order series resonance unit (L2, C2), series resonance unit, the second level (L4, C4), third level series resonance unit (L6, C6) and fourth stage series resonance unit (L8, C8) between this first order parallel resonance unit (L1, C1) and the 9th grade of parallel resonance unit (L9, C9); Series connection parallel resonance unit, the second level (L3, C3) between first order series resonance unit (L2, C2) and series resonance unit, the second level (L4, C4); Series connection third level parallel resonance unit (L5, C5) between series resonance unit, the second level (L4, C4) and third level series resonance unit (L6, C6), (L6, C6) and fourth stage series resonance unit (L8, C8) series connection fourth stage parallel resonance unit (L7, C7) in third level series resonance unit; The other end of described first order series resonance unit (L2, C2), series resonance unit, the second level (L4, C4), third level series resonance unit (L6, C6) and fourth stage series resonance unit (L8, C8) is ground connection respectively.
2. the miniature band stop filter of a kind of ultra broadband according to claim 1 is characterized in that: comprise that surface-pasted 50 ohmage input ports (P1), first order parallel resonance unit (L1, C1), first order series resonance unit (L2, C2), parallel resonance unit, the second level (L3, C3), series resonance unit, the second level (L4, C4), third level parallel resonance unit (L5, C5), third level series resonance unit (L6, C6), fourth stage parallel resonance unit (L7, C7), fourth stage series resonance unit (L8, C8), level V parallel resonance unit (L9, C9), surface-pasted 50 ohmage output ports (P2) and earth terminal all adopt multilayer LTCC technology to realize.
3. hybrid lump distribution minisize band-pass filter according to claim 1 and 2; It is characterized in that: comprise that surface-pasted 50 ohmage input ports (P1), first order parallel resonance unit (L1, C1), first order series resonance unit (L2, C2), parallel resonance unit, the second level (L3, C3), series resonance unit, the second level (L4, C4), third level parallel resonance unit (L5, C5), third level series resonance unit (L6, C6), fourth stage parallel resonance unit (L7, C7), fourth stage series resonance unit (L8, C8), level V parallel resonance unit (L9, C9), surface-pasted 50 ohmage output ports (P2) and earth terminal all adopt the strip line of lumped parameter to realize; Wherein, First order series resonance unit (L2, C2), series resonance unit, the second level (L4, C4), in the third level series resonance unit end ground connection respectively of (L6, C6), fourth stage series resonance unit (L8, C8); The other end end of an end, fourth stage parallel resonance unit (L7, the C7) of an end, third level parallel resonance unit (L5, the C5) of an end, parallel resonance unit, the second level (L3, the C3) of the strip line through separately and corresponding first order parallel resonance unit (L1, C1) respectively is continuous, and the other end of the 4th electric capacity (C4) of the other end of second electric capacity (C2) of first order series resonance unit (L2, C2), series resonance unit, the second level (L4, C4), the other end of the 8th electric capacity (C8) of the other end, fourth stage series resonance unit (L8, the C8) of the 6th electric capacity (C6) of (L6, C6) is distinguished ground connection in third level series resonance unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100778428A CN102610881A (en) | 2012-03-22 | 2012-03-22 | Ultra-wideband micro band rejection filter |
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| CN2012100778428A CN102610881A (en) | 2012-03-22 | 2012-03-22 | Ultra-wideband micro band rejection filter |
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| CN102610881A true CN102610881A (en) | 2012-07-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117427A (en) * | 2013-02-05 | 2013-05-22 | 江苏万邦微电子有限公司 | Wideband mini low temperature co-fired ceramic balance filter |
| CN104103880A (en) * | 2014-07-16 | 2014-10-15 | 南京理工大学 | Micro-type microwave and millimeter-wave self-loading I/Q phase invertible orthogonal filter |
| CN111211752A (en) * | 2020-02-26 | 2020-05-29 | 诺思(天津)微系统有限责任公司 | Filter, method of manufacturing the same, multiplexer, and communication apparatus |
| CN111710941A (en) * | 2019-03-18 | 2020-09-25 | Tdk株式会社 | Laminated filter device |
| CN116527009A (en) * | 2023-06-20 | 2023-08-01 | 华南理工大学 | Filter with electrical device and acoustic device mixed and radio frequency front end |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060043580A1 (en) * | 2004-09-02 | 2006-03-02 | Darfon Electronics Corp. | Bandpass filter within a multilayerd low temperature co-fired ceramic substrate |
-
2012
- 2012-03-22 CN CN2012100778428A patent/CN102610881A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060043580A1 (en) * | 2004-09-02 | 2006-03-02 | Darfon Electronics Corp. | Bandpass filter within a multilayerd low temperature co-fired ceramic substrate |
Non-Patent Citations (1)
| Title |
|---|
| DAVID M. POZAR: "《微波工程》", 31 March 2006, article ""带通和带阻转换"", pages: 338-339 - 346-348 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117427A (en) * | 2013-02-05 | 2013-05-22 | 江苏万邦微电子有限公司 | Wideband mini low temperature co-fired ceramic balance filter |
| CN104103880A (en) * | 2014-07-16 | 2014-10-15 | 南京理工大学 | Micro-type microwave and millimeter-wave self-loading I/Q phase invertible orthogonal filter |
| CN104103880B (en) * | 2014-07-16 | 2017-05-17 | 南京理工大学 | Micro-type microwave and millimeter-wave self-loading I/Q phase invertible orthogonal filter |
| CN111710941A (en) * | 2019-03-18 | 2020-09-25 | Tdk株式会社 | Laminated filter device |
| CN111710941B (en) * | 2019-03-18 | 2021-10-22 | Tdk株式会社 | Laminated filter device |
| CN111211752A (en) * | 2020-02-26 | 2020-05-29 | 诺思(天津)微系统有限责任公司 | Filter, method of manufacturing the same, multiplexer, and communication apparatus |
| CN111211752B (en) * | 2020-02-26 | 2021-04-16 | 诺思(天津)微系统有限责任公司 | Filter, method of manufacturing the same, multiplexer, and communication apparatus |
| CN116527009A (en) * | 2023-06-20 | 2023-08-01 | 华南理工大学 | Filter with electrical device and acoustic device mixed and radio frequency front end |
| CN116527009B (en) * | 2023-06-20 | 2023-12-05 | 华南理工大学 | Filter with electrical device and acoustic device mixed and radio frequency front end |
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Application publication date: 20120725 |