CN103794838B - S-band high-performance micro band based on LTCC leads to balance filter - Google Patents
S-band high-performance micro band based on LTCC leads to balance filter Download PDFInfo
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- CN103794838B CN103794838B CN201310332307.7A CN201310332307A CN103794838B CN 103794838 B CN103794838 B CN 103794838B CN 201310332307 A CN201310332307 A CN 201310332307A CN 103794838 B CN103794838 B CN 103794838B
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Abstract
The present invention relates to a kind of S-band high-performance micro band based on LTCC and lead to balance filter, comprise one and be applicable to surface-pasted 50 ohmage input interfaces, two four parallel resonance levels, input and output inductance being applicable to surface-pasted 75 ohmage output interfaces, using the matching stage of strip line and two built-in resistor realizations, adopt strip line to realize, above as structure all adopts multilayer LTCC technique and the design of 3 D stereo encapsulation and integration, significantly reduce size.Frequency band of the present invention is S-band.This technology has and covers that frequency range is wide, insertion loss value is little, input and output standing-wave ratio is low, cost is low, good reliability, temperature stability are good, consistency is good in batches for electrical property.Be adapted to the advantages such as production in enormous quantities.Be specially adapted to each frequency range radar, antenna, communication, arrow carry, in the hand-held and portable terminal device product of airborne, missile-borne, the radio communication such as individual soldier's mobile communication interruption, in following high data rate radio communication, there is broad prospect of application.
Description
Technical field
The invention belongs to microwave and millimeter wave technical field, relate to a kind of miniature band of hybrid LTCC being applied to microwave and millimeter wave circuit and lead to balance filter, particularly relate to a kind of S-band high-performance micro band based on LTCC and lead to balance filter.
Background technology
Along with developing rapidly of wireless communication technology, system is also more and more higher for the requirement of circuit miniaturization, in order to reduce the size of filter further and improve the performance of filter, development in recent years is got up a kind of LTCC(LTCC) technology, efficiently solve conventional filter design and be difficult to meet miniaturized and this problem of high performance requirements.LTCC (LTCC) technology adopts sandwich construction, is embedded in by passive device in ceramic material, obtains required modular assembly.LTCC technology all shows many merits in cost, integration packaging, wiring live width and distance between centers of tracks, low impedance metal, design diversity and flexibility and high frequency performance etc., has become the mainstream technology of passive integration.
Balance filter is mainly used in the unlimited radio-frequency front-ends receiving product such as bluetooth earphone, 802.11b/g/n wireless local area module, Wi-Fi, GPS, FM broadcast, important function is provided to comprise antenna (receiving and radiated electromagnetic wave), filter (band connection frequency is selected and suppressed to disturb), balancer (impedance and signal are changed) etc., the noise that balance filter can suppress ambient noise and inner active device to produce efficiently, thus there is superior electromagnetic compatibility characteristic, along with the develop rapidly of integrated circuit, can be more urgent to the demand of balancing device.
Domestic and international at present certain achievement is obtained for balance filter research, at the due filtering characteristic of guarantee, effectively can suppress common-mode noise simultaneously.Most of balance filter is by one but port filters and two barron structures realize, but shortcoming is that area is huge, and three port match effects are poor.
Summary of the invention
The object of the present invention is to provide pass-band loss compared with low, structure is simple, volume is little, cost is low, use conveniently lead to balance filter based on the S-band high-performance micro band of LTCC.
The technical scheme realizing the object of the invention is: a kind of S-band high-performance micro band based on LTCC leads to balance filter, comprise the 50 ohmage input ports that surface is installed, input inductance, first strip line, second strip line, 3rd strip line, 4th strip line, 5th strip line, 6th strip line, 7th strip line, 8th strip line, 9th strip line, tenth strip line, 11 strip line, 12 strip line, Z-type interstage coupling strip line 1, Z-type interstage coupling strip line 2, resonance coupling attaching strap-like line 1, resonance coupling attaching strap-like line 2, plated-through hole 1, plated-through hole 2, plated-through hole 3, plated-through hole 4, plated-through hole 5, plated-through hole 6, built-in resistor 1, built-in resistor 2, first outputting inductance, second outputting inductance, coupling strip line, first output port, second output port.
Compared with prior art, its remarkable advantage is in the present invention: (1) structure is simple; (2) volume size is little, reliability is strong; (3) device electrical performance is good, and insertion loss is little; (4) technique is easy to realize, relative and common waveguide balance filter, owing to adopting LTCC technology, processing and manufacturing difficulty of the present invention is reduced greatly; (5) production cost reduces; (6) have matching stage, make the general balance filter of this balance filter Performance Ratio much superior.
Accompanying drawing explanation
Fig. 1 is the structure chart that the S-band high-performance micro band that the present invention is based on LTCC leads to balance filter.
Fig. 2 is the structure vertical view that the S-band high-performance micro band that the present invention is based on LTCC leads to balance filter.
Fig. 3 is the structure side view that the S-band high-performance micro band that the present invention is based on LTCC leads to balance filter.
Fig. 4 is the amplitude-versus-frequency curve that the S-band high-performance micro band that the present invention is based on LTCC leads to balance filter.
Fig. 5 is the phase characteristic curve that the S-band high-performance micro band that the present invention is based on LTCC leads to balance filter.
embodiment:
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Composition graphs 1, Fig. 2, Fig. 3, the S-band high-performance micro band that the present invention is based on LTCC leads to balance filter, comprises the 50 ohmage input port P1 that surface is installed, input inductance L in, first strip line T1, second strip line T2, 3rd strip line T3, 4th strip line T4, 5th strip line T5, 6th strip line T6, 7th strip line T7, 8th strip line T8, 9th strip line T9, tenth strip line T10, 11 strip line T11, 12 strip line T12, Z-type interstage coupling strip line 1(O1), Z-type interstage coupling strip line 2(O2), resonance coupling attaching strap-like line 1(L1), resonance coupling attaching strap-like line 2(L2), plated-through hole 1(V1), plated-through hole 2(V2), plated-through hole 3(V3), plated-through hole 4(V4), plated-through hole 5(V5), plated-through hole 6(V6), built-in resistor 1(R1), built-in resistor 2(R2), first outputting inductance Lout1, second outputting inductance Lout2, coupling strip line Tlin, first output port P2, second output port P3.
Composition graphs 1, Fig. 2, Fig. 3, the S-band high-performance micro band that the present invention is based on LTCC leads to balance filter, comprises the first strip line T1, the second strip line T2 and the 3rd strip line T3 and forms parallel resonance level 1; 4th strip line T4, the 5th strip line T5 and the 6th strip line T6 form parallel resonance level 2; 7th strip line T7, the 8th strip line T8 and the 9th strip line T9 form parallel resonance level 3; Tenth strip line T10, the 11 strip line T11 and the 12 strip line T12 form parallel resonance level 4.Resonance coupling attaching strap-like line 1(L1), resonance coupling attaching strap-like line 2(L2), plated-through hole 1(V1), plated-through hole 2(V2), plated-through hole 3(V3), plated-through hole 4(V4), plated-through hole 5(V5), plated-through hole 6(V6), built-in resistor 1(R1), built-in resistor 2(R2), coupling strip line (Tlin) constitutes match circuit.In parallel resonance level 1, the first strip line T1, the second strip line T2 and the 3rd strip line T3 are one end ground connection, make short at one end, and wherein the earth terminal of the first strip line T1 and the 3rd strip line T3 is contrary with the earth terminal of the second strip line T2; In parallel resonance level 2, the 4th strip line T4, the 5th strip line T5 and the 6th strip line T6 are one end ground connection, make short at one end, and wherein the earth terminal of the 4th strip line T4 and the 6th strip line T6 is contrary with the earth terminal of the 5th strip line T5; In parallel resonance level 3, the 7th strip line T7, the 8th strip line T8 and the 9th strip line T9 are one end ground connection, make short at one end, and wherein the earth terminal of the 7th strip line T7 and the 9th strip line T9 is contrary with the earth terminal of the 8th strip line T8; In parallel resonance level 4, the tenth strip line T10, the 11 strip line T11 and the 12 strip line T12 are one end ground connection, make short at one end, and wherein the earth terminal of the tenth strip line T10 and the 12 strip line T12 is contrary with the earth terminal of the 11 strip line T11; The earth terminal of the first strip line T1, the 3rd strip line T3, the 4th strip line T4, the 6th strip line T6, the 7th strip line T7, the 8th strip line T8, the tenth strip line T10, the 12 strip line T12 is same earth terminal, and the earth terminal of the second strip line T2, the 5th strip line T5, the 8th strip line T8, the 11 strip line T11 is same earth terminal.Z-type interstage coupling strip line 1(O1) and Z-type interstage coupling strip line 2(O2) be two ends ground connection respectively.
Composition graphs 1, Fig. 2, Fig. 3, the S-band high-performance micro band that the present invention is based on LTCC leads to balance filter, comprises plated-through hole 1(V1) two ends mate attaching strap-like line 1(L1 with resonance respectively) be connected with the first outputting inductance (Lout1); Plated-through hole 2(V2) two ends respectively with coupling strip line (Tlin) be connected with the first outputting inductance (Lout1); Plated-through hole 3(V3) two ends all with coupling strip line (Tlin) be connected, play connection function; Plated-through hole 4(V4) two ends, two ends all with coupling strip line (Tlin) be connected, play connection function; Plated-through hole 5(V5) two ends respectively with coupling strip line (Tlin) be connected with the second outputting inductance (Lout2); Plated-through hole 6(V6) two ends mate attaching strap-like line 2(L2 with resonance respectively) be connected with the second outputting inductance (Lout2).
The operation principle that the S-band high-performance micro band that the present invention is based on LTCC leads to balance filter is as follows: the broadband microwave signal of input arrives the first parallel resonance level through input port P1 by input inductance L in, in described broadband microwave signal, enter in the first parallel resonance level T1, T2, T3 in the microwave signal of the first parallel resonance level near resonance, a microwave signal part for all the other non-first parallel resonance level near resonance is by T1, T2, T3 ground connection, realize first order filtering, another part, by the mode of coupling, enters the second parallel resonance level.Microwave signal near the second parallel resonance level enters in the second parallel resonance level T4, T5, T6, a microwave signal part near all the other non-second parallel resonance levels is by T4, T5, T6 ground connection, realize second level filtering, another part, by the mode of coupling, enters the 3rd parallel resonance level.Microwave signal near the 3rd parallel resonance level enters in the 3rd parallel resonance level T7, T8, T9, a microwave signal part near all the other non-3rd parallel resonance levels is by T7, T8, T9 ground connection, realize the 3rd pole filtering, another part, by the mode of coupling, enters the 4th parallel resonance level.Microwave signal near the 4th parallel resonance level enters in the 4th parallel resonance level T10, T11, T12, a microwave signal part near all the other non-4th parallel resonance levels is by T10, T11, T12 ground connection, realize the 4th pole filtering, another part is respectively by resonance coupling attaching strap-like line 1(L1) and resonance coupling attaching strap-like line 2(L2) microwave signal is input in match circuit.
Composition graphs 1, Fig. 2, Fig. 3, the S-band high-performance micro band that the present invention is based on LTCC leads in the match circuit of balance filter, by built-in resistor 1(R1), built-in resistor 2(R2), coupling strip line (Tlin) constitute match circuit, by regulating built-in resistor 1(R1) and the size of built-in resistor 2 (R2), effectively can improve the performance of balance filter, standing-wave ratio is reduced, realizes the impedance matching of three ports.This technology goes for various frequency.After completing coupling, microwave signal arrives output port P2 and output port P3 respectively by outputting inductance 1 (Lout1) and outputting inductance 2 (Lout2) again.
The size that the present invention is based on the E wave band height restraining band pass filter of LTCC is only 4.2mm × 2.5mm × 1.5mm.Its performance can be found out from Fig. 4 and Fig. 5, and pass band width is 3.8GHz ~ 4.2GHz, and in band, minimum insertion loss is 5.9dB, and return loss is better than 14dB.In passband, phase difference is greater than 175 °, can be good at the requirement of Differential Output.
Claims (1)
1. the S-band high-performance micro band based on LTCC leads to a balance filter, it is characterized in that: comprise the 50 ohmage input ports (P1) that surface is installed, input inductance (Lin), first strip line (T1), second strip line (T2), 3rd strip line (T3), 4th strip line (T4), 5th strip line (T5), 6th strip line (T6), 7th strip line (T7), 8th strip line (T8), 9th strip line (T9), tenth strip line (T10), 11 strip line (T11), 12 strip line (T12), Z-type interstage coupling strip line 1(O1), Z-type interstage coupling strip line 2(O2), resonance coupling attaching strap-like line 1(L1), resonance coupling attaching strap-like line 2(L2), plated-through hole 1(V1), plated-through hole 2(V2), plated-through hole 3(V3), plated-through hole 4(V4), plated-through hole 5(V5), plated-through hole 6(V6), built-in resistor 1(R1), built-in resistor 2(R2), first outputting inductance (Lout1), second outputting inductance (Lout2), coupling strip line (Tlin), first output port (P2), second output port (P3), first strip line (T1), the second strip line (T2) and the 3rd strip line (T3) form parallel resonance level 1, 4th strip line (T4), the 5th strip line (T5) and the 6th strip line (T6) form parallel resonance level 2, 7th strip line (T7), the 8th strip line (T8) and the 9th strip line (T9) form parallel resonance level 3, tenth strip line (T10), the 11 strip line (T11) and the 12 strip line (T12) form parallel resonance level 4, resonance coupling attaching strap-like line 1(L1), resonance coupling attaching strap-like line 2(L2), plated-through hole 1(V1), plated-through hole 2(V2), plated-through hole 3(V3), plated-through hole 4(V4), plated-through hole 5(V5), plated-through hole 6(V6), built-in resistor 1(R1), built-in resistor 2(R2), coupling strip line (Tlin) constitutes match circuit, in parallel resonance level 1, first strip line (T1), the second strip line (T2) and the 3rd strip line (T3) are one end ground connection, other end short circuit, wherein the earth terminal of the first strip line (T1) and the 3rd strip line (T3) is contrary with the earth terminal of the second strip line (T2), in parallel resonance level 2,4th strip line (T4), the 5th strip line (T5) and the 6th strip line (T6) are one end ground connection, other end short circuit, wherein the earth terminal of the 4th strip line (T4) and the 6th strip line (T6) is contrary with the earth terminal of the 5th strip line (T5), in parallel resonance level 3,7th strip line (T7), the 8th strip line (T8) and the 9th strip line (T9) are one end ground connection, other end short circuit, wherein the earth terminal of the 7th strip line (T7) and the 9th strip line (T9) is contrary with the earth terminal of the 8th strip line (T8), in parallel resonance level 4, tenth strip line (T10), the 11 strip line (T11) and the 12 strip line (T12) are one end ground connection, other end short circuit, wherein the earth terminal of the tenth strip line (T10) and the 12 strip line (T12) is contrary with the earth terminal of the 11 strip line (T11), the earth terminal of the first strip line (T1), the 3rd strip line (T3), the 4th strip line (T4), the 6th strip line (T6), the 7th strip line (T7), the 8th strip line (T8), the tenth strip line (T10), the 12 strip line (T12) is same earth terminal, and the earth terminal of the second strip line (T2), the 5th strip line (T5), the 8th strip line (T8), the 11 strip line (T11) is same earth terminal, Z-type interstage coupling strip line 1(O1) and Z-type interstage coupling strip line 2(O2) be two ends ground connection respectively, plated-through hole 1(V1) two ends mate attaching strap-like line 1(L1 with resonance respectively) be connected with the first outputting inductance (Lout1), plated-through hole 2(V2) two ends respectively with coupling strip line (Tlin) be connected with the first outputting inductance (Lout1), plated-through hole 3(V3) two ends all with coupling strip line (Tlin) be connected, play connection function, plated-through hole 4(V4) two ends all with coupling strip line (Tlin) be connected, play connection function, plated-through hole 5(V5) two ends respectively with coupling strip line (Tlin) be connected with the second outputting inductance (Lout2), plated-through hole 6(V6) two ends mate attaching strap-like line 2(L2 with resonance respectively) be connected with the second outputting inductance (Lout2).
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| CN103794838B true CN103794838B (en) | 2016-03-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104091989A (en) * | 2014-07-16 | 2014-10-08 | 南京理工大学 | Minitype microwave millimeter wave self-load I/Q orthogonal filter |
| CN104078729B (en) * | 2014-07-16 | 2016-07-06 | 南京理工大学 | The outer variable paraphase orthogonal filter of load I/Q of miniature microwave and millimeter wave |
| CN104332681B (en) * | 2014-09-12 | 2017-05-10 | 南京理工大学 | Novel three-dimensional multilayer single-zero-point dual-mode filter |
| CN105789788A (en) * | 2016-04-19 | 2016-07-20 | 戴永胜 | Novel multi-through hole composite resonance type band pass filter |
| CN107611534A (en) * | 2017-08-22 | 2018-01-19 | 南京理工大学 | A kind of new micro-strip cross-couplings triplexer |
| CN110380163A (en) * | 2019-04-24 | 2019-10-25 | 南京理工大学 | LTCC bimodulus ultra-wide band filter based on defect ground structure |
| CN113271514A (en) * | 2021-05-19 | 2021-08-17 | 猫牙(深圳)信息科技有限公司 | Novel miniaturized bluetooth headset based on LTCC technique |
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| US7825746B2 (en) * | 2005-06-03 | 2010-11-02 | The Chinese University Of Hong Kong | Integrated balanced-filters |
| CN102610884A (en) * | 2012-03-22 | 2012-07-25 | 南京理工大学常熟研究院有限公司 | Low temperature co-fired ceramic ultra-wideband micro filter |
| CN102820502B (en) * | 2012-08-07 | 2015-03-25 | 南通大学 | Balanced dual-pass band filter |
| 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 |
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