CN105703735A - UHF-band miniature duplexer based on LTCC technology - Google Patents
UHF-band miniature duplexer based on LTCC technology Download PDFInfo
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Abstract
The invention discloses a UHF-band miniature duplexer based on an LTCC technology. The UHF-band miniature duplexer comprises a three-port isolation circuit and two microwave filters with different frequency band ranges, and is implemented by adopting a multi-layer low temperature co-fired ceramic technology. The UHF-band miniature duplexer has the advantages of easy debugging, light weight, small size, high reliability, good electrical performance, good temperature stability, good electrical performance batch consistency, low cost, mass production capability and the like, and is suitable for places and corresponding systems with restrict requirements on size, electrical performance, temperature stability and reliability, such as communication of corresponding microwave frequency bands and satellite communication.
Description
Technical field
The present invention relates to a kind of duplexer, it is adaptable to two different UHF waveband。
Background technology
In recent years, microminiaturized developing rapidly 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, and the performance of microwave filter, size, reliability and cost are all had higher requirement。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.。The wave filter of different frequency is connected by switching, shaping filter group, it is possible to expand the use scope of wave filter。
LTCC is a kind of Electronic Encapsulating Technology, adopts 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 in cost, integration packaging, wiring live width and distance between centers of tracks, low impedance metal, design diversity and motility and high frequency performance etc., 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, it is possible to well processes size little, and precision is high, and tight type is good, the microwave device that loss is little。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 micro microwave filter group。
Summary of the invention
It is an object of the invention to provide and a kind of realized that volume is little, lightweight, reliability is high by strip lines configuration, excellent electrical property, easy to use, applied widely, yield rate is high, the batch miniature duplexer that concordance is good, cost is low, temperature performance is stable。
The technical scheme realizing the object of the invention is: a kind of UHF waveband miniature duplexer based on LTCC technology, isolates circuit and two microwave filters including LC。First microwave filter includes surface-pasted 50 ohmage first input port, the first input inductance, the first resonator, the second resonator, the 3rd resonator, the 4th resonator, the first outputting inductance, the first Z-shaped interstage coupling strip line, surface-pasted 50 ohmage the first output port and earth terminals。Wherein, the first resonator is formed by first coil and the first Capacitance parallel connection, and one end of first coil is connected with one end of the first electric capacity, the other end of first coil and the other end of the first electric capacity ground connection respectively；Second resonator is formed by the second coil and the second Capacitance parallel connection, and one end of the second coil is connected with one end of the second electric capacity, the other end of the second coil and the other end of the second electric capacity ground connection respectively；3rd resonator is formed by tertiary coil and the 3rd Capacitance parallel connection, and one end of tertiary coil is connected with one end of the 3rd electric capacity, the other end of tertiary coil and the other end of the 3rd electric capacity ground connection respectively；4th resonator is formed by the 4th coil and the 4th Capacitance parallel connection, and one end of the 4th coil is connected with one end of the 4th electric capacity, the other end of the 4th coil and the other end of the 4th electric capacity ground connection respectively；First coil, the second coil, tertiary coil, the 4th coil are two-layer square spiral coil structure, and the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity are double-level-metal and harden structure。Surface-pasted 50 ohmage first input port are connected with the first left end inputting inductance, the right-hand member of the first input inductance is connected with first coil and the first electric capacity, the right-hand member of surface-pasted 50 ohmage the first output ports and the first outputting inductance connects, the left end of the first outputting inductance is connected with the 4th coil and the 4th electric capacity, and the first Z-shaped interstage coupling strip line is positioned on the first resonator, the second resonator, the 3rd resonator, the 4th resonator。Second microwave filter includes surface-pasted 50 ohmage the second input ports, the second input inductance, the 5th resonator, sixth resonator, the 7th resonator, the 8th resonator, the second outputting inductance, the second Z-shaped interstage coupling strip line, surface-pasted 50 ohmage the second output port and earth terminals。Wherein, the 5th resonator is formed by the 5th coil and the 5th Capacitance parallel connection, and one end of the 5th coil is connected with one end of the 5th electric capacity, the other end of the 5th coil and the other end of the 5th electric capacity ground connection respectively；Sixth resonator is formed by the 6th coil and the 6th Capacitance parallel connection, and one end of the 6th coil is connected with one end of the 6th electric capacity, the other end of the 6th coil and the other end of the 6th electric capacity ground connection respectively；7th resonator is formed by the 7th coil and the 7th Capacitance parallel connection, and one end of the 7th coil is connected with one end of the 7th electric capacity, the other end of the 7th coil and the other end of the 7th electric capacity ground connection respectively；8th resonator is formed by the 8th coil and the 8th Capacitance parallel connection, and one end of the 8th coil is connected with one end of the 8th electric capacity, the other end of the 8th coil and the other end of the 8th electric capacity ground connection respectively；5th coil, the 6th coil, the 7th coil, the 8th coil are two-layer square spiral coil structure, and the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity are double-level-metal and harden structure。The left end of surface-pasted 50 ohmage the second input ports and the second input inductance connects, the right-hand member of the second input inductance is connected with the 5th coil and the 5th electric capacity, the right-hand member of surface-pasted 50 ohmage the second output ports and the second outputting inductance connects, the left end of the second outputting inductance is connected with the 8th coil and the 8th electric capacity, and the second Z-shaped interstage coupling strip line is positioned on the 5th resonator, sixth resonator, the 7th resonator, the 8th resonator。
Compared with prior art, owing to the present invention adopts low-loss low-temperature co-burning ceramic material and 3 D stereo integrated, that brings has the remarkable advantages that: smooth in (1) band；(2) signal waveform that different frequency is identical can be produced；(3) volume is little, lightweight, reliability is high；(4) excellent electrical property；(5) circuit realiration simple in construction, it may be achieved produce in enormous quantities；(6) cost is low。
Accompanying drawing explanation
Figure1(a) be a kind of UHF waveband miniature duplexer based on LTCC technology of the present invention contour structures signalFigure。
Fig. 1 (B) it is that the present invention is a kind of based on the profile of the first microwave filter in the UHF waveband micro microwave filter group of LTCC technology and internal structure signalFigure。
Fig. 1 (C) it is that the present invention is a kind of based on the profile of the second microwave filter in the UHF waveband micro microwave filter group of LTCC technology and internal structure signalFigure。
Fig. 2It it is a kind of UHF waveband miniature duplexer output port amplitude frequency curve based on LTCC technology of the present inventionFigure。
Fig. 3It it is a kind of UHF waveband miniature duplexer input port return loss plot based on LTCC technology of the present inventionFigure。
Detailed description of the invention
Below in conjunction withAccompanying drawingThe present invention is described in further detail。
In conjunction withFig. 1 (A), (b), (c), a kind of UHF waveband miniature duplexer based on LTCC technology of the present invention, the first microwave filter F1 of this duplexer includes surface-pasted 50 ohmage first input port P1, the first input inductance Lin1, the first resonator L1, C1, the second resonator L2, C2, the 3rd resonator L3, C3, the 4th resonator L4, C4, the first outputting inductance Lout1, the first Z-shaped interstage coupling strip line Z1, surface-pasted 50 ohmage the first output port P2 and earth terminals。Wherein, first resonator L1, C1 is formed in parallel by first coil L1 and the first electric capacity C1, and one end of first coil L1 is connected with one end of the first electric capacity C1, the other end of first coil L1 and the other end of the first electric capacity C1 ground connection respectively；Second resonator L2, C2 is formed in parallel by the second coil L2 and the second electric capacity C2, and one end of the second coil L2 is connected with one end of the second electric capacity C2, the other end of the second coil L2 and the other end of the second electric capacity C2 ground connection respectively；3rd resonator L3, C3 is formed in parallel by tertiary coil L3 and the three electric capacity C3, and one end of tertiary coil L3 is connected with one end of the 3rd electric capacity C3, the other end of tertiary coil L3 and the other end of the 3rd electric capacity C3 ground connection respectively；4th resonator L4, C4 is formed in parallel by the 4th coil L4 and the four electric capacity C4, and one end of the 4th coil L4 is connected with one end of the 4th electric capacity C4, the other end of the 4th coil L4 and the other end of the 4th electric capacity C4 ground connection respectively；First coil L1, the second coil L2, tertiary coil L3, the 4th coil L4 are two-layer square spiral coil structure, and the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 are double-level-metal and harden structure。The left end of surface-pasted 50 ohmage first input port P1 and the first input inductance Lin1 connects, the right-hand member of the first input inductance Lin1 is connected with first coil L1 and the first electric capacity C1, the right-hand member of surface-pasted 50 ohmage the first output port P2 and the first outputting inductance Lout1 connects, left end and the 4th coil L4 and the 4th electric capacity C4 of the first outputting inductance Lout1 are connected, and the first Z-shaped interstage coupling strip line Z1 is positioned on the first resonator L1, C1, the second resonator L2, C2, the 3rd resonator L3, C3, the 4th resonator L4, C4。Second microwave filter F2 includes surface-pasted 50 ohmage the second input port P3, the second input inductance Lin2, the 5th resonator L5, C5, sixth resonator L6, C6, the 7th resonator L7, C7, the 8th resonator L8, C8, the second outputting inductance Lout2, the second Z-shaped interstage coupling strip line Z2, surface-pasted 50 ohmage the second output port P4 and earth terminals。Wherein, the 5th resonator L5, C5 is formed in parallel by the 5th coil L5 and the five electric capacity C5, and one end of the 5th coil L5 is connected with one end of the 5th electric capacity C5, the other end of the 5th coil L5 and the other end of the 5th electric capacity C5 ground connection respectively；Sixth resonator L6, C6 are formed in parallel by the 6th coil L6 and the six electric capacity C6, and one end of the 6th coil L6 is connected with one end of the 6th electric capacity C6, the other end of the 6th coil L6 and the other end of the 6th electric capacity C6 ground connection respectively；7th resonator L7, C7 is formed in parallel by the 7th coil L7 and the seven electric capacity C7, and one end of the 7th coil L7 is connected with one end of the 7th electric capacity C7, the other end of the 7th coil L3 and the other end of the 7th electric capacity C7 ground connection respectively；8th resonator L8, C8 is formed in parallel by the 8th coil L8 and the eight electric capacity C8, and one end of the 8th coil L8 is connected with one end of the 8th electric capacity C8, the other end of the 8th coil L8 and the other end of the 8th electric capacity C8 ground connection respectively；5th coil L5, the 6th coil L6, the 7th coil L7, the 8th coil L8 are two-layer square spiral coil structure, and the 5th electric capacity C5, the 6th electric capacity C6, the 7th electric capacity C7, the 8th electric capacity C8 are double-level-metal and harden structure。The left end of surface-pasted 50 ohmage the second input port P3 and the second input inductance Lin2 connects, right-hand member and the 5th coil L5 and the 5th electric capacity C5 of the second input inductance Lin2 are connected, the right-hand member of surface-pasted 50 ohmage the second output port P4 and the second outputting inductance Lout2 connects, left end and the 8th coil L8 and the 8th electric capacity C8 of the second outputting inductance Lout2 are connected, and the second Z-shaped interstage coupling strip line Z2 is positioned on the 5th resonator L5, C5, sixth resonator L6, C6, the 7th resonator L7, C7, the 8th resonator L8, C8。
In conjunction withFig. 1 a, b, c, surface-pasted 50 ohmage input port P1, P3, surface-pasted 50 ohmage output port P2, P4, input inductance Lin1, Lin2, outputting inductance Lout1, Lout2, electric capacity C1, C2, C3, C4, C5, C6, C7, C8, coil L1, L2, L3, L4, L5, L6, L7, L8, Z-shaped interstage coupling strip line Z1, Z2 and earth terminal all adopt multilamellar LTCC technique to realize。
A kind of UHF waveband miniature duplexer based on LTCC technology, owing to being employing multilamellar LTCC technique realization, its low-temperature co-burning ceramic material and metallic pattern sinter at about 900 DEG C of temperature and form, so having extreme high reliability and temperature stability, owing to structure adopts, 3 D stereo is integrated to be grounded with multilayer folding structure and outer surface metallic shield and encapsulates, so that volume significantly reduces。
The present invention is a kind of is 3.2mm × 3.2mm × 1.5mm based on the size of two microwave filters in the UHF waveband miniature duplexer of LTCC technology。Its performance can be fromFig. 2、Fig. 3Find out, the pass band width of the first microwave filter is 140MHz ~ 200MHz, the corresponding return loss of input port is better than 11.3dB, output port insertion loss is better than 3.2dB, the pass band width of the second microwave filter is 480MHz ~ 780MHz, the corresponding return loss of input port is better than 13.9dB, and output port insertion loss is better than 2dB。
Claims (3)
1. the UHF waveband miniature duplexer based on LTCC technology, it is characterised in that: include LC and isolate the microwave filter of circuit and two different frequency ranges；First microwave filter (F1) includes surface-pasted 50 ohmage first input port (P1), the first input inductance (Lin1), the first resonator (L1, C1), the second resonator (L2, C2), the 3rd resonator (L3, C3), the 4th resonator (L4, C4), the first outputting inductance (Lout1), the first Z-shaped interstage coupling strip line (Z1), surface-pasted 50 ohmage the first output port (P2) and earth terminals；
Wherein, first resonator (L1, C1) is formed in parallel by first coil (L1) and the first electric capacity (C1), one end of first coil (L1) is connected with one end of the first electric capacity (C1), the other end of first coil (L1) and the other end of the first electric capacity (C1) ground connection respectively；Second resonator (L2, C2) is formed in parallel by the second coil (L2) and the second electric capacity (C2), one end of second coil (L2) is connected with one end of the second electric capacity (C2), the other end of the second coil (L2) and the other end of the second electric capacity (C2) ground connection respectively；3rd resonator (L3, C3) is formed in parallel by tertiary coil (L3) and the 3rd electric capacity (C3), one end of tertiary coil (L3) is connected with one end of the 3rd electric capacity (C3), the other end of tertiary coil (L3) and the other end of the 3rd electric capacity (C3) ground connection respectively；4th resonator (L4, C4) is formed in parallel by the 4th coil (L4) and the 4th electric capacity (C4), one end of 4th coil (L4) is connected with one end of the 4th electric capacity (C4), the other end of the 4th coil (L4) and the other end of the 4th electric capacity (C4) ground connection respectively；First coil (L1), the second coil (L2), tertiary coil (L3), the 4th coil (L4) are two-layer square spiral coil structure, and the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4) are double-level-metal and harden structure；
Surface-pasted 50 ohmage first input port (P1) are connected with the first left end inputting inductance (Lin1), the right-hand member of the first input inductance (Lin1) is connected with first coil (L1) and the first electric capacity (C1), surface-pasted 50 ohmages the first output port (P2) are connected with the right-hand member of the first outputting inductance (Lout1), the left end of the first outputting inductance (Lout1) is connected with the 4th coil (L4) and the 4th electric capacity (C4), first Z-shaped interstage coupling strip line (Z1) is positioned at the first resonator (L1, C1), second resonator (L2, C2), 3rd resonator (L3, C3), 4th resonator (L4, C4) on；Second microwave filter (F2) is identical with the first microwave filter (F1) structure, including surface-pasted 50 ohmages the second input port (P3), the second input inductance (Lin2), the 5th resonator (L5, C5), sixth resonator (L6, C6), the 7th resonator (L7, C7), the 8th resonator (L8, C8), the second outputting inductance (Lout2), the second Z-shaped interstage coupling strip line (Z2), surface-pasted 50 ohmage the second output port (P4) and earth terminals；Wherein, 5th resonator (L5, C5) is formed in parallel by the 5th coil (L5) and the 5th electric capacity (C5), one end of 5th coil (L5) is connected with one end of the 5th electric capacity (C5), the other end of the 5th coil (L5) and the other end of the 5th electric capacity (C5) ground connection respectively；Sixth resonator (L6, C6) is formed in parallel by the 6th coil (L6) and the 6th electric capacity (C6), one end of 6th coil (L6) is connected with one end of the 6th electric capacity (C6), the other end of the 6th coil (L6) and the other end of the 6th electric capacity (C6) ground connection respectively；7th resonator (L7, C7) is formed in parallel by the 7th coil (L7) and the 7th electric capacity (C7), one end of 7th coil (L7) is connected with one end of the 7th electric capacity (C7), the other end of the 7th coil (L7) and the other end of the 7th electric capacity (C7) ground connection respectively；8th resonator (L8, C8) is formed in parallel by the 8th coil (L8) and the 8th electric capacity (C8), one end of 8th coil (L8) is connected with one end of the 8th electric capacity (C8), the other end of the 8th coil (L8) and the other end of the 8th electric capacity (C8) ground connection respectively；5th coil (L5), the 6th coil (L6), the 7th coil (L7), the 8th coil (L8) are two-layer square spiral coil structure, and the 5th electric capacity (C5), the 6th electric capacity (C6), the 7th electric capacity (C7), the 8th electric capacity (C8) are double-level-metal and harden structure；Surface-pasted 50 ohmages the second input port (P3) are connected with the second left end inputting inductance (Lin2), the right-hand member of the second input inductance (Lin2) is connected with the 5th coil (L5) and the 5th electric capacity (C5), surface-pasted 50 ohmages the second output port (P4) are connected with the right-hand member of the second outputting inductance (Lout2), the left end of the second outputting inductance (Lout2) is connected with the 8th coil (L8) and the 8th electric capacity (C8), second Z-shaped interstage coupling strip line (Z2) is positioned at the 5th resonator (L5, C5), sixth resonator (L6, C6), 7th resonator (L7, C7), 8th resonator (L8, C8) on。
2. the UHF waveband miniature duplexer based on LTCC technology according to claim 1, it is characterised in that: surface-pasted 50 ohmage input ports (P1, P3), surface-pasted 50 ohmage output ports (P2, P4), input inductance (Lin1, Lin2), outputting inductance (Lout1, Lout2), electric capacity (C1, C2, C3, C4, C5, C6, C7, C8), coil (L1, L2, L3, L4, L5, L6, L7, L8), Z-shaped interstage coupling strip line (Z1, Z2) and earth terminal all adopt multilamellar LTCC technique to realize。
3. the UHF waveband miniature duplexer based on LTCC technology according to claim 1 and 2, it is characterized in that: first input port (P1) inputs inductance (Lin1) by first and is connected with the first electric capacity (C1) and first coil (L1), first output port (P2) is connected with the 4th electric capacity (C4) and the 4th coil (L4) by the first outputting inductance (Lout1), second input port (P3) inputs inductance (Lin2) by second and is connected with the 5th electric capacity (C5) and the 5th coil (L5), second output port (P4) is connected with the 8th electric capacity (C8) and the 8th coil (L8) by the second outputting inductance (Lout2)。
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1756076A (en) * | 2004-09-28 | 2006-04-05 | 富士通媒体部品株式会社 | Duplexer |
| CN102255609A (en) * | 2010-05-17 | 2011-11-23 | 上海交泰信息科技有限公司 | Low temperature cofired ceramic (LTCC)-process-based duplexer with novel structure |
| US20120112850A1 (en) * | 2010-11-09 | 2012-05-10 | Duck Hwan Kim | Matching segment circuit to which radio frequency is applied and radio frequency integrated devices using the matching segment circuit |
| CN103066348A (en) * | 2013-01-30 | 2013-04-24 | 深圳市麦捷微电子科技股份有限公司 | Novel low temperature co-fired ceramic (LTCC) duplexer |
-
2015
- 2015-09-01 CN CN201510553155.2A patent/CN105703735A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1756076A (en) * | 2004-09-28 | 2006-04-05 | 富士通媒体部品株式会社 | Duplexer |
| CN102255609A (en) * | 2010-05-17 | 2011-11-23 | 上海交泰信息科技有限公司 | Low temperature cofired ceramic (LTCC)-process-based duplexer with novel structure |
| US20120112850A1 (en) * | 2010-11-09 | 2012-05-10 | Duck Hwan Kim | Matching segment circuit to which radio frequency is applied and radio frequency integrated devices using the matching segment circuit |
| CN103066348A (en) * | 2013-01-30 | 2013-04-24 | 深圳市麦捷微电子科技股份有限公司 | Novel low temperature co-fired ceramic (LTCC) duplexer |
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| Title |
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| ALEXANDER SIMINE ET.AL: "Design of Quasi-Lumped-element LTCC Filters and Duplexers for wireless communications", 《33RD EUROPEAN MICROWAVE CONFERENCE-MUNICH2003》 * |
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Application publication date: 20160622 |