CN103117427A - Wideband mini low temperature co-fired ceramic balance filter - Google Patents
Wideband mini low temperature co-fired ceramic balance filter Download PDFInfo
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- CN103117427A CN103117427A CN2013100470591A CN201310047059A CN103117427A CN 103117427 A CN103117427 A CN 103117427A CN 2013100470591 A CN2013100470591 A CN 2013100470591A CN 201310047059 A CN201310047059 A CN 201310047059A CN 103117427 A CN103117427 A CN 103117427A
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Abstract
The invention discloses a wideband mini low temperature co-fired ceramic balance filter. The wideband mini low temperature co-fired ceramic balance filter comprises an input port and two output ports applicable to surface mounting, two cascade connection capacitors, three zero capacitors, three zero inductors, four coupling strip lines and a ground connection port, wherein each element is designed by using a lumped parameter strip line, and the structure is achieved by using multilayer low temperature co-fired ceramic process technology. The wideband mini low temperature co-fired ceramic balance filter has the advantages of being small in size, wide in frequency band, low in weight, high in reliability, good in phase frequency character linearity, good in temperature stability, low in cost, and capable of being produced in large batch quantity, having low phase unbalance performance and low amplitude unbalance performance and the like, wherein the advantage of being small in size has extremely important significance for research of microwave system miniaturization. A microwave balance filter is an extremely important device in a modern wireless communication system. Furthermore, the wideband mini low temperature co-fired ceramic balance filter is applicable to a radio frequency front end module.
Description
Technical field
The present invention relates to a kind of filter, particularly wide-band miniature LTCC balance filter.
Background technology
Day by day universal along with radio communication and individual radio electronics end product, concern and pursuit, the especially device that performance is excellent, volume is little, cost low and the high target of reliability more and more is subject to people is miniaturizated to forward position and the focus of research.Radio frequency passive device is part important in radio-frequency module, and due to the inherent characteristic of radio frequency passive device, the volume that occupies in system is larger, and the volume that adopts the Planar integration technology to dwindle far can not satisfy engineering demand.With LTCC Technology (Low Temperature Co-fired Ceramic, LTCC) stepped construction for the basis have that volume is little, cost is low, the advantage such as simple in structure, dependable performance, be applied widely at aspects such as filter, oscillator, frequency mixer, antennas.The microwave balance filter is very important device in modern wireless communication systems.In many wireless communications application, such as WLAN (wireless local area network), bluetooth and low noise block downconverter etc., the balance filter circuit is widely used in RF front-end module.The present invention is based on LTCC technique, development is suitable for wide-band miniature LTCC (LTCC) balance filter of requirement of engineering, and the key technical indexes of describing this component capabilities has: band connection frequency, stop-band frequency, passband insertion loss, return loss, unbalance in phase, amplitude disequilibrium, stopband attenuation, volume, weight, reliability etc.Research at present realizes that separately the design of microwave filter and Ba Lun occurs, yet but there is no both to integrate the balance filter of realizing miniaturization, low unbalance in phase, low amplitude value disequilibrium, so often can not use under harsh occasion for requiring.
Summary of the invention
The object of the present invention is to provide a kind of bandwidth, low unbalance in phase, low amplitude value disequilibrium, volume is little, lightweight, reliability is high, electrical property is excellent, simple in structure, rate of finished products is high, temperature performance is stable wide-band miniature LTCC balance filter.
the technical scheme that realizes the object of the invention is: wide-band miniature LTCC balance filter is characterized in that comprising input port, Pyatyi high pass filter, the modified model three lines coupling Ba Lun of surface-pasted 50 ohmages, the first output port of surface-pasted 50 ohmages, the second output port and the earth terminal of surface-pasted 50 ohmages, the Pyatyi high pass filter is comprised of the first inductance, the second inductance, the 3rd inductance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, modified model three line coupling Ba Lun are comprised of the first coupling strip line, the second coupling strip line, the 3rd coupling strip line, the 4th coupling strip line, the uneven input signal of one termination of input port, one end of another termination the 4th electric capacity of input port and an end of the first inductance, one end of another termination the first electric capacity of the first inductance, the other end of the first electric capacity is connected to earth terminal, one end of another termination the 5th electric capacity of the 4th electric capacity and an end of the second inductance, one end of another termination the second electric capacity of the second inductance, the other end of the second electric capacity is connected to earth terminal, one end of another termination the 3rd inductance of the 5th electric capacity and an end of the first coupling strip line, one end of another termination the 3rd electric capacity of the 3rd inductance, the other end of the 3rd electric capacity is connected on earth terminal, the other end of the first coupling strip line is connected on earth terminal, the two ends of the second coupling strip line all are connected on earth terminal, one end of one termination the 4th coupling strip line of the 3rd coupling strip line, another termination first output port of the 3rd coupling strip line, the other end output balanced signal of the first output port, another termination second output port of the 4th coupling strip line, the other end output balanced signal of the second output port.
Compared with prior art, due to the present invention adopt the low-loss low-temperature co-burning ceramic material and 3 D stereo integrated, the remarkable advantage that brings is: (1) bandwidth; (2) low unbalance in phase; (3) low amplitude value disequilibrium; (4) volume is little, lightweight, reliability is high; (5) temperature stability is high; (6) electrical property consistency is good, can realize producing in enormous quantities; (7) cost is low; (8) easy to install and use, can use full-automatic chip mounter to install and welding.
Description of drawings
Fig. 1 is the circuit theory diagrams of wide-band miniature LTCC balance filter of the present invention.
Fig. 2 is profile and the internal structure schematic diagram of wide-band miniature LTCC balance filter of the present invention.
Fig. 3 is the performance curve of the three-dimensional full-wave simulation of wide-band miniature LTCC balance filter of the present invention.
Fig. 4 is the unbalance in phase linearity curve of the three-dimensional full-wave simulation of wide-band miniature LTCC balance filter of the present invention.
Fig. 5 is the amplitude disequilibrium curve of the three-dimensional full-wave simulation of wide-band miniature LTCC balance filter of the present invention.
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 a kind of wide-band miniature LTCC balance filter, comprises input port P1, Pyatyi high pass filter, the modified model three lines coupling Ba Lun of surface-pasted 50 ohmages, the first output port P2 and second output port P3 and the earth terminal of surface-pasted 50 ohmages, the Pyatyi high pass filter is comprised of the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, modified model three line coupling Ba Lun are comprised of the first coupling strip line M1, the second coupling strip line M2, the 3rd coupling strip line M3, the 4th coupling strip line M4, the uneven input signal of the termination of input port P1, one end of another termination the 4th capacitor C 4 of input port P1 and an end of the first inductance L 1, one end of another termination the first capacitor C 1 of the first inductance L 1, the other end of the first capacitor C 1 is connected to earth terminal, one end of another termination the 5th capacitor C 5 of the 4th capacitor C 4 and an end of the second inductance L 2, one end of another termination the second capacitor C 2 of the second inductance L 2, the other end of the second capacitor C 2 is connected to earth terminal, one end of another termination the 3rd inductance L 3 of the 5th capacitor C 5 and the end of the first coupling strip line M1, one end of another termination the 3rd capacitor C 3 of the 3rd inductance L 3, the other end of the 3rd capacitor C 3 is connected on earth terminal, the other end of the first coupling strip line M1 is connected on earth terminal, the two ends of the second coupling strip line M2 all are connected on earth terminal, the end of termination the 4th coupling strip line M4 of the 3rd coupling strip line M3, another termination the first output port P2 of the 3rd coupling strip line M3, the other end output balanced signal of the first output port P2, another termination the second output port P3 of the 4th coupling strip line M4, the other end output balanced signal of the second output port P3.
in conjunction with Fig. 2, wide-band miniature LTCC balance filter of the present invention, the input port P1 of surface-pasted 50 ohmages of this balance filter, the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the first coupling strip line M1, the second coupling strip line M2, the 3rd coupling strip line M3, the 4th coupling strip line M4, the first output port P2 of surface-pasted 50 ohmages and the second output port P3 and earth terminal all adopt multilayer to realize with LTCC technique, the first inductance L 1 wherein, the second inductance L 2, the 3rd inductance L 3, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5 all adopts the strip line of lumped parameter to realize.The first coupling strip line M1, the second coupling strip line M2, the 3rd coupling strip line M3, the 4th coupling strip line M4 all adopt the strip lines configuration of distributed constant to realize.
In conjunction with Fig. 2, wide-band miniature LTCC balance filter of the present invention, in this balance filter, the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, the first coupling strip line M1, the second coupling strip line M2, the 3rd coupling strip line M3, the 4th coupling strip line M4 all form with the rectangular mode coiling, and interlayer is connected by manhole; The first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5 all adopt media plate electric capacity to realize.
Wide-band miniature LTCC balance filter of the present invention, in conjunction with Fig. 1, Fig. 2, its operation principle is summarized as follows: broadband signal is from the input port P1 input of surface-pasted 50 ohmages, enter the Pyatyi high pass filter, thereby the signal that its medium frequency is lower flows to earth terminal by filtering through the first inductance L 1 and the first capacitor C 1, and the higher signal of frequency arrives an end of the 5th capacitor C 5 by the 4th capacitor C 4; Thereby the signal that next frequency is lower flows to earth terminal by filtering through the second inductance L 2 and the second capacitor C 2, and the signal of upper frequency arrives the output of Pyatyi high pass filter by the 5th capacitor C 5; Next the signal that frequency is lower flows to earth terminal through the 3rd inductance L 3 and the 3rd capacitor C 3 and by filtering, thereby completes high pass filter function.next flow into the end of the first coupling strip line M1 of modified model three line coupling Ba Lun by the signal of Pyatyi high pass filter, the other end of the first coupling strip line M1 is connected to earth terminal, the two ends of the second coupling strip line M2 all are connected to earth terminal, enter in signal coupling to the three coupling strip line M3 of the first coupling strip line M1, the first output port P2 of surface-pasted 50 ohmages of a termination of the 3rd coupling strip line M3, export a balanced signal, and the other end of the 3rd coupling strip line M3 connects the end of the 4th coupling strip line M4, the second output port P3 of surface-pasted 50 ohmages of another termination of the 4th coupling strip line M4, export another balanced signal, the amplitude approximately equal of two output signals, phase difference is close to 180 °, thereby realize well the function of wide-band miniature LTCC balance filter output balanced signal.
A kind of wide-band miniature LTCC balance filter is owing to being the realization of employing multilayer LTCC technique, its low-temperature co-burning ceramic material and metallic pattern sintering at about 900 ℃ of temperature forms, 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 a kind of wide-band miniature LTCC of Fig. 2 model balance filter is 2.0mm * 1.5mm * 1.38mm.In conjunction with Fig. 3, Fig. 4 and shown in Figure 5, this balance filter at passband 1.65 GHz in 2.15 GHz frequency ranges, the return loss of uneven port is all below 10 decibels, insertion loss is less than 2.8 decibels, the unbalance in phase of balance ports is less than 180 ° ± 6.2 °, and the amplitude disequilibrium is less than 0.5 decibel, and stopband 0.9 GHz is in 1.45 GHz scopes, decay has good balanced signal output performance greater than 26.2 decibels.
Claims (3)
1. wide-band miniature LTCC balance filter is characterized in that: comprise input port (P1), Pyatyi high pass filter, the modified model three lines coupling Ba Lun of surface-pasted 50 ohmages, the first output port (P2) and the second output port (P3) and the earth terminal of surface-pasted 50 ohmages, the Pyatyi high pass filter is comprised of the first inductance (L1), the second inductance (L2), the 3rd inductance (L3), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the 5th electric capacity (C5), modified model three line coupling Ba Lun are comprised of the first coupling strip line (M1), the second coupling strip line (M2), the 3rd coupling strip line (M3), the 4th coupling strip line (M4), the uneven input signal of one termination of input port (P1), one end of another termination the 4th electric capacity (C4) of input port (P1) and an end of the first inductance (L1), one end of another termination the first electric capacity (C1) of the first inductance (L1), the other end of the first electric capacity (C1) is connected to earth terminal, one end of another termination the 5th electric capacity (C5) of the 4th electric capacity (C4) and an end of the second inductance (L2), one end of another termination the second electric capacity (C2) of the second inductance (L2), the other end of the second electric capacity (C2) is connected to earth terminal, one end of another termination the 3rd inductance (L3) of the 5th electric capacity (C5) and an end of the first coupling strip line (M1), one end of another termination the 3rd electric capacity (C3) of the 3rd inductance (L3), the other end of the 3rd electric capacity (C3) is connected on earth terminal, the other end of the first coupling strip line (M1) is connected on earth terminal, the two ends of the second coupling strip line (M2) all are connected on earth terminal, one end of one termination the 4th coupling strip line (M4) of the 3rd coupling strip line (M3), another termination first output port (P2) of the 3rd coupling strip line (M3), the other end output balanced signal of the first output port (P2), another termination second output port (P3) of the 4th coupling strip line (M4), the other end output balanced signal of the second output port (P3).
2. wide-band miniature LTCC balance filter according to claim 1, it is characterized in that: the input port of surface-pasted 50 ohmages (P1), the first inductance (L1), the second inductance (L2), the 3rd inductance (L3), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the 5th electric capacity (C5), the first coupling strip line (M1), the second coupling strip line (M2), the 3rd coupling strip line (M3), the 4th coupling strip line (M4), first output port (P2) of surface-pasted 50 ohmages and the second output port (P3) and earth terminal all adopt multilayer to realize with LTCC technique, the first inductance (L1) wherein, the second inductance (L2), the 3rd inductance (L3), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the 5th electric capacity (C5) all adopts the strip line of lumped parameter to realize, the first coupling strip line (M1), the second coupling strip line (M2), the 3rd coupling strip line (M3), the 4th coupling strip line (M4) all adopt the strip lines configuration of distributed constant to realize.
3. wide-band miniature LTCC balance filter according to claim 1 and 2, it is characterized in that: the first inductance (L1), the second inductance (L2), the 3rd inductance (L3), the first coupling strip line (M1), the second coupling strip line (M2), the 3rd coupling strip line (M3), the 4th coupling strip line (M4) all form with the rectangular mode coiling, and interlayer is connected by manhole; The first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the 5th electric capacity (C5) all adopt media plate electric capacity to realize.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100470591A CN103117427A (en) | 2013-02-05 | 2013-02-05 | Wideband mini low temperature co-fired ceramic balance filter |
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| CN2013100470591A CN103117427A (en) | 2013-02-05 | 2013-02-05 | Wideband mini low temperature co-fired ceramic balance filter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413993A (en) * | 2013-08-01 | 2013-11-27 | 南京理工大学 | Distributed miniature band-pass balance filter |
| CN103794838A (en) * | 2013-08-01 | 2014-05-14 | 南京理工大学 | LTCC-based S-waveband high-performance micro band-pass balanced filter |
| CN103986434A (en) * | 2014-04-15 | 2014-08-13 | 中国电子科技集团公司第五十五研究所 | Lumped parameter minitype LTCC high-pass filter |
| CN104022750A (en) * | 2014-05-28 | 2014-09-03 | 中国电子科技集团公司第三十研究所 | Broadband electrically tunable filter circuit |
| CN106450630A (en) * | 2016-10-31 | 2017-02-22 | 嘉兴佳利电子有限公司 | Miniaturized high-restrain multilayer balun |
| CN104241737B (en) * | 2014-09-03 | 2017-06-06 | 华南理工大学 | A kind of LTCC based on resonator coupling filters balun |
| CN116054771A (en) * | 2023-04-03 | 2023-05-02 | 南通至晟微电子技术有限公司 | Reflection-free broadband filter |
Citations (5)
| 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 |
| CN1855612A (en) * | 2005-04-25 | 2006-11-01 | 京瓷株式会社 | Bandpass wave filter, hf module and RF communication device using same |
| CN102437435A (en) * | 2010-06-28 | 2012-05-02 | 株式会社村田制作所 | Module |
| CN102610881A (en) * | 2012-03-22 | 2012-07-25 | 南京理工大学常熟研究院有限公司 | Ultra-wideband micro band rejection filter |
| CN102856620A (en) * | 2012-08-29 | 2013-01-02 | 西安瓷芯电子科技有限责任公司 | Balun with laminated structure |
-
2013
- 2013-02-05 CN CN2013100470591A patent/CN103117427A/en active Pending
Patent Citations (5)
| 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 |
| CN1855612A (en) * | 2005-04-25 | 2006-11-01 | 京瓷株式会社 | Bandpass wave filter, hf module and RF communication device using same |
| CN102437435A (en) * | 2010-06-28 | 2012-05-02 | 株式会社村田制作所 | Module |
| CN102610881A (en) * | 2012-03-22 | 2012-07-25 | 南京理工大学常熟研究院有限公司 | Ultra-wideband micro band rejection filter |
| CN102856620A (en) * | 2012-08-29 | 2013-01-02 | 西安瓷芯电子科技有限责任公司 | Balun with laminated structure |
Non-Patent Citations (1)
| Title |
|---|
| YONGSHENG DAI .ET AL: "A LTCC Miniaturized Broadband Modified Marchand Balun", 《2012 INTERNATIONAL SYMPOSIUM ON COMMUNICATIONS AND INFORMATION TECHNOLOGIES》, 31 December 2012 (2012-12-31) * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413993A (en) * | 2013-08-01 | 2013-11-27 | 南京理工大学 | Distributed miniature band-pass balance filter |
| CN103794838A (en) * | 2013-08-01 | 2014-05-14 | 南京理工大学 | LTCC-based S-waveband high-performance micro band-pass balanced filter |
| CN103413993B (en) * | 2013-08-01 | 2015-09-30 | 南京理工大学 | Distributed type minisize band leads to balance filter |
| CN103986434A (en) * | 2014-04-15 | 2014-08-13 | 中国电子科技集团公司第五十五研究所 | Lumped parameter minitype LTCC high-pass filter |
| CN104022750A (en) * | 2014-05-28 | 2014-09-03 | 中国电子科技集团公司第三十研究所 | Broadband electrically tunable filter circuit |
| CN104241737B (en) * | 2014-09-03 | 2017-06-06 | 华南理工大学 | A kind of LTCC based on resonator coupling filters balun |
| CN106450630A (en) * | 2016-10-31 | 2017-02-22 | 嘉兴佳利电子有限公司 | Miniaturized high-restrain multilayer balun |
| CN106450630B (en) * | 2016-10-31 | 2021-08-03 | 嘉兴佳利电子有限公司 | Miniaturized high-inhibition multilayer balun |
| CN116054771A (en) * | 2023-04-03 | 2023-05-02 | 南通至晟微电子技术有限公司 | Reflection-free broadband filter |
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Application publication date: 20130522 |