CN103117428A - Miniature band-pass filter of 60G millimeter waves - Google Patents
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Abstract
The invention discloses a miniature band-pass filter of 60G millimeter waves comprises a surface-mounted input / output interface, four parallel resonance units, three zero setting units, a Z-shaped cross coupling circuit and an input and output inductor, wherein the four parallel resonance units are paralleled through a two-layer folded coupled stripline, every element utilizes more than two low-temperature co-fired ceramic technology, and the input and output inductor utilizes a stripline design with distributed parameters. The miniature band-pass filter of 60G millimeter waves has the advantages of small size, good performance, high reliability, low cost, excellent electrical performance, good temperature stability, good electrical performance batch consistency and the like, is especially applicable to bluetooth transmission, ISM (Industrial Scientific Medical) frequency band transmission, corresponding microwave frequency communication, digital radar, single soldier satellite mobile terminal, military and civilian multi-mode and multi-channel communication system terminal, wireless communication handheld terminal, and corresponding systems which have strict requirements on the size, weight, performance and reliability.
Description
Technical field
The present invention relates to a kind of filter, particularly a kind of 60G millimeter wave minisize band-pass filter.
Background technology
Millimeter wave frequency band is the main frequency range of present Military Electronics technical development, is widely used in the aspects such as guided missile precise guidance, radar, secure communication, electronic countermeasures and measuring technology.That millimeter wave equipment has is high on target resolution, good directionality, contain much information, be subjected to bad weather to affect the advantages such as little, has obtained in recent years development very soon.In general, the cost of millimeter-wave systems is higher, in order to save cost, adopts low cost, small size, filter that performance is good just to seem very important in millimeter-wave systems.The raising that requires along with the miniaturization of microwave and millimeter wave system in recent years, various circuit technologies such as thin film technique, multilayer circuit plate technique, ceramic technology receive increasing concern, and LTCC (LTCC) technology is considered to be best suited in various techniques a kind of technology of microwave and millimeter wave multi-chip module (MCM) and tool future.the millimeter wave filter of introducing in document at present is that volume is larger mostly, reliability is low, cost is high, can not adapt to the requirement of miniaturization, even the filter based on the LTCC art designs is all also the filter of frequency lower (1G-10G) basically, and almost do not have in the design of millimeter wave frequency band based on the multistage band pass filter of LTCC, possesses volume as the millimeter wave passive device of making based on MEMS technique little, performance is good, the advantages such as high conformity, become the better means that solve monolithic millimeter wave transceiving assembly, but compare with LTCC technique, use the millimeter wave filter cost of MEMS explained hereafter too expensive, volume is larger, performance is also lower, although and the millimeter wave filter differential loss of use waveguide design is less, the filter volume that is based on this structural design is very large, is difficult to realize the requirement of miniaturization, and sideband is precipitous not as the filter that uses the LTCC technological design.
Summary of the invention
The object of the present invention is to provide the 60G millimeter wave minisize band-pass filter that a kind of volume is little, lightweight, reliability is high, temperature performance is stablized, electrical property excellent, electrical property consistency is good in batches, cost is low.
the technical scheme that realizes the object of the invention is: a kind of 60G millimeter wave minisize band-pass filter, comprise the 50 ohmage input ports that install on the surface, the input inductance, first order parallel resonance unit, the first zero arranges circuit, parallel resonance unit, the second level, the second reset circuit, third level parallel resonance unit, the 3rd reset circuit, fourth stage parallel resonance unit, the 4th reset circuit, outputting inductance, 50 ohmage output port and the earth terminals that install on the surface, input port is connected with the input inductance, output port is connected with outputting inductance, first order parallel resonance in parallel unit between this outputting inductance and input inductance, parallel resonance unit, the second level, third level parallel resonance unit and fourth stage parallel resonance unit, the first zero of connecting between first order parallel resonance unit and parallel resonance unit, the second level arranges circuit, the second reset circuit of connecting between parallel resonance unit, the second level and third level parallel resonance unit, the 3rd reset circuit of connecting between third level parallel resonance unit and fourth stage parallel resonance unit, the 4th reset circuit of connecting between the first order and fourth stage parallel resonance unit and zigzag cross-couplings strip line, the other end of described first order parallel resonance unit, parallel resonance unit, the second level, third level parallel resonance unit and fourth stage parallel resonance unit is ground connection respectively.
The present invention compared with prior art, its remarkable advantage is: (1) the present invention utilizes multilayer LTCC technique (LTCC) characteristics, adopts the stereoscopic multi-layer laminated construction to realize circuit element, greatly reduced volume; (2) utilize the high characteristics of LTCC ceramic dielectric dielectric constant can significantly reduce component size equally; (3) utilize the low-loss characteristics of LTCC material and unique circuit structure to realize excellent electrical property; (4) utilize high-temperature stability and the reliability of low-temp ceramics material, make element have high-temperature stability and high reliability; (5) utilize the consistency of the production in enormous quantities of LTCC technique, obtain high finished product rate and low cost.In a word, the present invention has that volume is little, lightweight, reliability is high, electrical property is excellent, the electrical property temperature stability is high, the circuit implementation structure is simple, electrical property consistency good, can install and welding, be specially adapted in the radio communication handheld terminals such as rocket, airborne, missile-borne, spaceship, individual soldier's mobile communication terminal with full-automatic chip mounter, and volume, weight, performance, reliability are had in the harsh corresponding system that requires.
Description of drawings
Fig. 1 is the electrical schematic diagram of 60G millimeter wave minisize band-pass filter of the present invention.
Fig. 2 is profile and the internal structure schematic diagram of 60G millimeter wave minisize band-pass filter of the present invention.
Fig. 3 is the parallel resonance cellular construction schematic diagram of 60G millimeter wave minisize band-pass filter of the present invention.
Fig. 4 is the three-dimensional full-wave simulation performance curve of 60G millimeter wave minisize band-pass 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 and Fig. 3, the present invention is a kind of 60G millimeter wave minisize band-pass filter, this filter comprises the 50 ohmage input port P1 that install on the surface, input inductance L 5, first order parallel resonance unit L1C1, the first zero arranges circuit L12C12, parallel resonance unit, second level L2C2, the second reset circuit L23C23, third level parallel resonance unit L3C3, the 3rd reset circuit L34C34, fourth stage parallel resonance unit L4C4, the 4th reset circuit L14C14, outputting inductance L6, 50 ohmage output port P2 and the earth terminals that install on the surface, the 50 ohmage input port P1 one termination input signals that install on the surface, one end of another termination input inductance L 5, the other end and the first order parallel resonance unit L1C1 of input inductance L 5, the first zero arranges circuit L12C12, the public connecting end of the 4th reset circuit L14C14 is connected, wherein first order parallel resonance unit L1C1 is formed in parallel by the first inductance L 1 and the first capacitor C 1, the first zero arranges circuit L12C12 and is in series by first zero inductance L 12 and first zero capacitor C 12, the 4th reset circuit L14C14 by the 4th zero point inductance L 14 and the 4th minimum capacity C14 be in series, the other end that the first zero arranges circuit L12C12 is connected with the common port of parallel resonance unit, second level L2C2, the second reset circuit L23C23, parallel resonance unit, second level L2C2 is formed in parallel by the second inductance L 2 and the second capacitor C 2, the second reset circuit L23C23 by second zero point inductance L 23 and the second minimum capacity C23 be in series, the other end of the second reset circuit L23C23 is connected with the common port of third level parallel resonance unit L3C3, the 3rd reset circuit L34C34, third level parallel resonance unit L3C3 is formed in parallel by the 3rd inductance L 3 and the 3rd capacitor C 3, the 3rd reset circuit L34C34 by the 3rd zero point inductance L 34 and the 3rd minimum capacity C34 be in series, the other end of the 3rd reset circuit L34C34 is connected with the common port of fourth stage parallel resonance unit L4C4, the 4th reset circuit L14C14, outputting inductance L6, and fourth stage parallel resonance unit L4C4 is formed in parallel by the 4th inductance L 4 and the 4th capacitor C 4, the other end of outputting inductance L6 is connected with the end of output port P2, another termination output signal of output port P2, the other end of first order parallel resonance unit L1C1, parallel resonance unit, second level L2C2, third level parallel resonance unit L3C3 and fourth stage parallel resonance unit L4C4 is ground connection respectively.
in conjunction with Fig. 2 and Fig. 3,60G millimeter wave minisize band-pass filter of the present invention, input port P1, input inductance L 5, first order parallel resonance unit L1C1, the first zero arranges circuit L12C12, parallel resonance unit, second level L2C2, the second reset circuit L23C23, third level parallel resonance unit L3C3, the 3rd reset circuit L34C34, fourth stage parallel resonance unit L4C4, the 4th reset circuit L14C14, outputting inductance L6, output port P2 and earth terminal all adopt multilayer LTCC technique to realize, wherein input inductance L 5, outputting inductance L6 all adopts the strip line of distributed constant to realize, first order parallel resonance unit L1C1, parallel resonance unit, second level L2C2, third level parallel resonance unit L3C3, fourth stage parallel resonance unit L4C4 all adopts two-layer folding coupling strip line to realize, first zero capacitor C 12, the second minimum capacity C23, the 3rd minimum capacity C34, the 4th minimum capacity C14 adopts between first order parallel resonance unit L1C1 and parallel resonance unit, second level L2C2 respectively, between second level parallel resonance unit L2C2 and third level parallel resonance unit L3C3, between third level parallel resonance unit L3C3 and fourth stage parallel resonance unit L4C4, between first order L1C1 and fourth stage parallel resonance unit L4C4 and zigzag cross-couplings strip line, Space Coupling and distributed constant electric capacity are realized, first zero inductance L 12, second zero point inductance L 23, the 3rd zero point inductance L 34, the 4th zero point inductance L 14 adopt respectively between first order parallel resonance unit L1C1 and parallel resonance unit, second level L2C2, between second level parallel resonance unit L2C2 and third level parallel resonance unit L3C3, between third level parallel resonance unit L3C3 and fourth stage parallel resonance unit L4C4, between first order parallel resonance unit L1C1 and fourth stage parallel resonance unit L4C4 and zigzag cross-couplings strip line, Space Coupling and distributed constant inductance are realized.
In conjunction with Fig. 2, Fig. 3,60G millimeter wave minisize band-pass filter of the present invention, first order parallel resonance unit L1C1, parallel resonance unit, second level L2C2, third level parallel resonance unit L3C3 and fourth stage parallel resonance unit L4C4 adopt the two-layer folding coupling strip line structure of distributed constant to realize, wherein every layer of strip line one end is unsettled, other end ground connection.
60G millimeter wave minisize band-pass filter of the present invention, the first zero arranges in circuit L12C12, first zero inductance L 12 adopts Space Coupling and the realization of distributed constant inductance between first order parallel resonance unit L1C1 and parallel resonance unit, second level L2C2, and first zero capacitor C 12 adopts Space Coupling and the realization of distributed constant electric capacity between first order parallel resonance unit L1C1 and parallel resonance unit, second level L2C2; In the second reset circuit L23C23, second zero point inductance L 23 adopt between second level parallel resonance unit L2C2 and the third level parallel resonance unit L3C3 Space Coupling and distributed constant inductance to realize, the second minimum capacity C23 adopts between second level parallel resonance unit L2C2 and the third level parallel resonance unit L3C3 Space Coupling and distributed constant electric capacity to realize; In the 3rd reset circuit L34C34, the 3rd zero point inductance L 34 adopt between third level parallel resonance unit L3C3 and the fourth stage parallel resonance unit L4C4 Space Coupling and distributed constant inductance to realize, the 3rd minimum capacity C34 adopts between third level parallel resonance unit L3C3 and the fourth stage parallel resonance unit L4C4 Space Coupling and distributed constant electric capacity to realize; In the 4th reset circuit L14C14, the 4th zero point inductance L 14 adopt between first order parallel resonance unit L1C1 and fourth stage parallel resonance unit L4C4 and zigzag cross-couplings strip line Space Coupling and distributed constant inductance to realize, the 4th minimum capacity C14 adopts Space Coupling and the realization of distributed constant electric capacity between first order parallel resonance unit L1C1 and fourth stage parallel resonance unit L4C4 and zigzag cross-couplings strip line.
60G millimeter wave minisize band-pass filter of the present invention, its operation principle is summarized as follows: the broadband microwave signal of input arrives first order parallel resonance unit L1C1 through input port P1 by input inductance L 5, the end that the end that the first inductance L 1 is connected with the first capacitor C 1 and the first zero arrange circuit L12C12, an end at first order parallel resonance unit L1C1, in described broadband microwave signal, enter near the microwave signal first order parallel resonance unit resonance frequency that between first order parallel resonance unit L1C1 and parallel resonance unit, second level L2C2, the first zero arranges circuit L12C12, near all the other non-first order parallel resonance unit resonance frequencies microwave signal is by the first inductance L 1 and the first capacitor C 1 ground connection in first order parallel resonance unit L1C1, realize first order filtering.The first zero arranges near the stopband microwave signal of parallel resonance frequency of circuit L12C12, it is near microwave signal first zero frequency, suppressed because presenting high impedance, near the microwave frequency signal the non-first zero arrives in parallel resonance unit, second level L2C2 by first zero inductance L 12 and the first zero capacitor C 12 that the first zero arranges in circuit L12C12.the end of the second reset circuit L23C23 between the end that the second inductance L 2 and the second capacitor C 2 are connected and second level parallel resonance unit L2C2 and third level parallel resonance unit L3C3, process first order filtering and the first zero arrange the microwave signal of circuit L12C12, near parallel resonance unit, second level L2C2 resonance frequency microwave signal enters the second reset circuit L23C23, near all the other non-second level parallel resonance unit resonance frequencies microwave signal is by the second inductance L 2 and the second capacitor C 2 ground connection in parallel resonance unit, second level L2C2, realize second level filtering.near the parallel resonance frequency of the second reset circuit L23C23 stopband microwave signal, near i.e. microwave signal the second zero frequency, suppressed because presenting high impedance, near non-the second zero point microwave frequency signal by in the second reset circuit L23C23 second zero point inductance L 23 arrive a end that the 3rd inductance L 3 in third level parallel resonance unit L3C3 is connected with the 3rd capacitor C 3 and the end of the 3rd reset circuit L34C34 with the second minimum capacity C23, through the first order, second level filtering and the first zero arrange circuit L12C12, the microwave signal of the second reset circuit L23C23, near the 3rd parallel resonance unit L3C3 resonance frequency microwave signal enters the 3rd reset circuit L34C34 between third level parallel resonance unit L3C3 and fourth stage parallel resonance unit L4C4, near all the other non-the 3rd microwave signals of parallel resonance unit L34C34 resonance frequency are passed through the 3rd inductance L 3 and the 3rd capacitor C 3 ground connection in third level parallel resonance unit L3C3, realize third level filtering.near the parallel resonance frequency of the 3rd reset circuit L34C34 stopband microwave signal, near i.e. microwave signal the 3rd zero frequency, suppressed because presenting high impedance, near non-the 3rd zero point microwave frequency signal by in the 3rd reset circuit L34C34 the 3rd zero point inductance L 34 arrive a end that in fourth stage parallel resonance unit L4C4, the 4th inductance L 4 is connected with the 4th capacitor C 4 and first and fourth stage parallel resonance unit L1C1 with the 3rd minimum capacity C34, the end of the 4th reset circuit L14C14 between L4C4 and zigzag cross-couplings strip line, through the first order, the second level, third level filtering and first, second, the microwave signal of the 3rd reset circuit, near fourth stage parallel resonance unit L4C4 resonance frequency microwave signal enters the 4th reset circuit L14C14.near the parallel resonance frequency of the 4th reset circuit L14C14 stopband microwave signal, near i.e. microwave signal the 4th zero frequency, suppressed because presenting high impedance, near the 4th microwave signal and near the microwave frequency addition non-the 4th zero point of parallel resonance unit L4C4 resonance frequency connects the end of surface-pasted 50 ohmage output port P2 afterwards by outputting inductance L6, near all the other non-the 4th parallel resonance unit resonance frequencies microwave signal is by the 4th inductance L 4 and the 4th capacitor C 4 ground connection in fourth stage parallel resonance unit L4C4, realize fourth stage filtering.Through first order filtering, second level filtering, third level filtering, fourth stage filtering, the first zero arranges circuit L12C12, the second reset circuit L23C23, the 3rd reset circuit L34C34, the microwave signal of the 4th reset circuit L14C14, by the other end output of surface-pasted 50 ohmage output port P2, thereby realize the miniature band-pass filtering function of 60G millimeter wave.
60G millimeter wave minisize band-pass 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.
It is 1.6mm * 0.6mm * 0.8mm that 60G millimeter wave minisize band-pass filter is implemented volume.This filter bandwidht is 6GHz, and the logical in-band insertion loss of simulation filter device is all less than 2 decibels, and low-resistance belt suppresses to be better than-45 decibels, and high stopband suppresses to be better than-40 decibels, has good performance of filter.
Claims (4)
1. 60G millimeter wave minisize band-pass filter, it is characterized in that: comprise the 50 ohmage input ports (P1) that install on the surface, input inductance (L5), first order parallel resonance unit (L1, C1), the first zero arranges circuit (L12, C12), parallel resonance unit, the second level (L2, C2), the second reset circuit (L23, C23), third level parallel resonance unit (L3, C3), the 3rd reset circuit (L34, C34), fourth stage parallel resonance unit (L4, C4), the 4th reset circuit (L14, C14), outputting inductance (L6), 50 ohmage output port (P2) and the earth terminals that install on the surface, 50 ohmage input port (P1) the termination input signals that install on the surface, one end of another termination input inductance (L5), the other end and the first order parallel resonance unit (L1 of input inductance (L5), C1), the first zero arranges circuit (L12, C12), the 4th reset circuit (L14, C14) public connecting end is connected, first order parallel resonance unit (L1 wherein, C1) be formed in parallel by the first inductance (L1) and the first electric capacity (C1), the first zero arranges circuit (L12, C12) be in series by first zero inductance (L12) and first zero electric capacity (C12), the 4th reset circuit (L14, C14) be in series by the 4th inductance at zero point (L14) and the 4th minimum capacity (C14), the first zero arranges circuit (L12, C12) the other end and parallel resonance unit, the second level (L2, C2), the second reset circuit (L23, C23) common port is connected, parallel resonance unit, the second level (L2, C2) be formed in parallel by the second inductance (L2) and the second electric capacity (C2), the second reset circuit (L23, C23) is in series by the second inductance at zero point (L23) and the second minimum capacity (C23), the second reset circuit (L23, C23) the other end and third level parallel resonance unit (L3, C3), the 3rd reset circuit (L34, C34) common port is connected, third level parallel resonance unit (L3, C3) be formed in parallel by the 3rd inductance (L3) and the 3rd electric capacity (C3), the 3rd reset circuit (L34, C34) is in series by the 3rd inductance at zero point (L34) and the 3rd minimum capacity (C34), the 3rd reset circuit (L34, C34) the other end and fourth stage parallel resonance unit (L4, C4), the 4th reset circuit (L14, C14), the common port of outputting inductance (L6) is connected, fourth stage parallel resonance unit (L4, C4) is formed in parallel by the 4th inductance (L4) and the 4th electric capacity (C4), the other end of outputting inductance (L6) is connected with an end of output port (P2), another termination output signal of output port (P2), the other end of first order parallel resonance unit (L1, C1), parallel resonance unit, the second level (L2, C2), third level parallel resonance unit (L3, C3) and fourth stage parallel resonance unit (L4, C4) is ground connection respectively.
2. 60G millimeter wave minisize band-pass filter according to claim 1, is characterized in that: input port (P1), input inductance (L5), first order parallel resonance unit (L1, C1), the first zero arranges circuit (L12, C12), parallel resonance unit, the second level (L2, C2), the second reset circuit (L23, C23), third level parallel resonance unit (L3, C3), the 3rd reset circuit (L34, C34), fourth stage parallel resonance unit (L4, C4), the 4th reset circuit (L14, C14), outputting inductance (L6), output port (P2) and earth terminal all adopt multilayer LTCC technique to realize, wherein input inductance (L5), outputting inductance (L6) all adopts the strip line of distributed constant to realize, first order parallel resonance unit (L1, C1), parallel resonance unit, the second level (L2, C2), third level parallel resonance unit (L3, C3), fourth stage parallel resonance unit (L4, C4) all adopts two-layer folding coupling strip line to realize, first zero electric capacity (C12), the second minimum capacity (C23), the 3rd minimum capacity (C34), the 4th minimum capacity (C14) adopts between first order parallel resonance unit (L1, C1) and parallel resonance unit, the second level (L2, C2) respectively, between parallel resonance unit, the second level (L2, C2) and third level parallel resonance unit (L3, C3), between third level parallel resonance unit (L3, C3) and fourth stage parallel resonance unit (L4, C4), between first order parallel resonance unit (L1, C1) and fourth stage parallel resonance unit (L4, C4), Space Coupling and distributed constant electric capacity are realized, first zero inductance (L12), the second inductance at zero point (L23), the 3rd inductance at zero point (L34), the 4th inductance at zero point (L14) adopts between first order parallel resonance unit (L1, C1) and parallel resonance unit, the second level (L2, C2) respectively, between parallel resonance unit, the second level (L2, C2) and third level parallel resonance unit (L3, C3), between third level parallel resonance unit (L3, C3) and fourth stage parallel resonance unit (L4, C4), between first order parallel resonance unit (L1, C1) and fourth stage parallel resonance unit (L4, C4), Space Coupling and distributed constant inductance are realized.
3. desired 60G millimeter wave minisize band-pass filter according to claim 1, it is characterized in that: first order parallel resonance unit (L1, C1), second level parallel resonance unit (L2, C2), third level parallel resonance unit (L3, C3), fourth stage parallel resonance unit (L4, C4) adopt the two-layer folding coupling strip line structure of distributed constant to realize, wherein every layer of strip line one end is unsettled, other end ground connection.
4. desired 60G millimeter wave minisize band-pass filter according to claim 1, it is characterized in that: wherein the first zero arranges circuit (L12, C12) in, first zero inductance (L12) adopts first order parallel resonance unit (L1, C1) and parallel resonance unit, the second level (L2, C2) between, Space Coupling and distributed constant inductance are realized, first zero electric capacity (C12) adopts first order parallel resonance unit (L1, C1) Space Coupling and distributed constant electric capacity are realized and between parallel resonance unit, the second level (L2, C2); The second reset circuit (L23, C23) in, the second inductance at zero point (L23) adopts parallel resonance unit, the second level (L2, C2) and two parallel resonance unit (L3 of the third level, C3) between, Space Coupling and distributed constant inductance are realized, the second minimum capacity (C23) adopts Space Coupling and the realization of distributed constant electric capacity between parallel resonance unit, the second level (L2, C2) and third level parallel resonance unit (L3, C3); The 3rd reset circuit (L34, C34) in, the 3rd inductance at zero point (L34) adopts third level parallel resonance unit (L3, C3) and fourth stage parallel resonance unit (L4, C4) between, Space Coupling and distributed constant inductance are realized, the 3rd minimum capacity (C34) adopts Space Coupling and the realization of distributed constant electric capacity between third level parallel resonance unit (L3, C3) and fourth stage parallel resonance unit (L4, C4); The 4th reset circuit (L14, C14) in, the 4th inductance at zero point (L14) adopts first order parallel resonance unit (L1, C1) and fourth stage parallel resonance unit (L4, C4) Space Coupling and distributed constant inductance are realized and between zigzag cross-couplings strip line, the 4th minimum capacity (C14) adopts Space Coupling and the realization of distributed constant electric capacity between first order parallel resonance unit (L1, C1) and fourth stage parallel resonance unit (L4, C4) and zigzag cross-couplings strip line.
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| CN103441316A (en) * | 2013-08-01 | 2013-12-11 | 南京理工大学 | Minitype band-pass filter with amplitude equalization function |
| 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 |
| CN104183893A (en) * | 2014-08-19 | 2014-12-03 | 南京理工大学 | Multi-level microwave Balun filter of strip-line structure |
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