CN105990630A - High-selectivity Balun band pass filter based on substrate integrated waveguide - Google Patents
High-selectivity Balun band pass filter based on substrate integrated waveguide Download PDFInfo
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Abstract
The invention discloses a high-selectivity Balun band pass filter based on substrate integrated waveguide. The filter comprises an input-end feed line, a second port output-end feed line, a third port output-end feed line, an input-end substrate integrated waveguide, an output-end substrate integrated waveguide, a first substrate integrated waveguide resonant cavity and a second substrate integrated waveguide resonant cavity, wherein the input-end feed line and second port output-end feed line are positioned in the upper surface of a dielectric substrate, the third port output-end feed line is positioned in the lower surface of the dielectric substrate; input and output feed lines are connected with input and output substrate integrated waveguides via a coplanar waveguide structure; and energy coupling is realized among the input and output substrate integrated waveguides and the substrate integrated waveguide resonant cavities via a metalized through hole sensitive window. According to the invention, two balanced output ports of the substrate integrated waveguides are placed in upper and lower surfaces of a medium respectively, and sourced-load coupling is introduced to realize the Balun band pass filter which is simple in structure, low in loss, high in reliability, high in matching feature and high in selectivity.
Description
Technical field
The present invention relates to microwave passive component technical field, a kind of high selectivity balun based on substrate integration wave-guide
Band filter.
Background technology
In recent years, along with present mobile communication, WLAN, satellite communication and radar, the fast development of remote sensing technology,
Frequency microwave device in communication system is proposed the requirement of miniaturization.Balun wave filter is a kind of by balun and wave filter
The frequency microwave device that function combines, it is not only able to be converted into unbalanced signal balanced signal, simultaneously also can be right
Signal plays the function of filtering.For communication system, balun and wave filter are integrated one three port of formation
Device, can effectively reduce loss and the size of system.On the other hand, substrate integration wave-guide (SIW) is to carry in recent years
A kind of novel waveguide structure gone out, it had both remained, and the volume of planar microstrip structure is little, lightweight, be easily integrated and process
The advantage such as convenient, the loss having again metal waveguide structure concurrently is low, Q-value is high, the feature of excellent performance.Therefore, design base
High-performance balun wave filter in substrate integration wave-guide is with a wide range of applications.
Existing document reports balun band filter based on substrate integration wave-guide:
Document 1 (Lin-Sheng Wu, Yong-Xin Guo, Jun-Fa Mao, and Wen-Yan Yin, " Design of a
substrate integrated waveguide balun filter based on three-port coupled resonator circuit
Model ", IEEE Microwave Wireless Compon.Lett., 2011 (21): 252-254) propose at 5 rank bandpass filterings
A TE is introduced on the basis of device201The substrate integration wave-guide resonator cavity of pattern, realizes unbalanced signal to balanced signal
Conversion, obtain the cross-couplings born simultaneously, create a pair zero point in the both sides of passband, improve selectivity.
Document 2 (J.N.Hui, W.J.Feng and W.Q.Che, " Balun bandpass filter based on multilayer
substrate integrated waveguide power divider”,IEEE Electronic Letters,2012(48):571-573)
Propose on the basis of chip integrated waveguide power distributor, inside substrate integration wave-guide, place 4 plated-through holes realize
Balun band filter.
But both the above balun based on substrate integration wave-guide band filter has the disadvantage in that
(1) relatively big and two Differential Output ports the amplitude difference of the balun band filter size proposed in document 1 is bigger.
(2) the balun band filter proposed in document 2 is owing to employing multiple structure, is unfavorable for and other planar circuits
Integrated, passband both sides do not have zero point simultaneously, therefore selectivity is not good enough.
Summary of the invention
Size is little, circuit structure is compact, insertion loss is little, two balance output ends to it is an object of the invention to provide one
Matching properties is good for mouth, have high selective balun band filter based on substrate integration wave-guide.
The technical solution realizing the present invention is: a kind of high selectivity balun bandpass filtering based on substrate integration wave-guide
Device, including input feeder line, Two-port netwerk outfan feeder line, three port outfan feeder lines, input substrate integration wave-guide,
Outfan substrate integration wave-guide, the first substrate integration wave-guide resonator cavity, the second substrate integration wave-guide resonator cavity, medium substrate,
Wherein input feeder line and Two-port netwerk outfan feeder line are positioned at the upper surface of medium substrate, and three port outfan feeder lines are positioned at Jie
The lower surface of matter substrate, input substrate integration wave-guide, outfan substrate integration wave-guide, the first substrate integration wave-guide resonance
Chamber, the second substrate integration wave-guide resonator cavity are made up of plated-through hole；Input feeder line by the first coplanar waveguide structure with
Input substrate integration wave-guide connects, and Two-port netwerk outfan feeder line is integrated with outfan substrate by the second coplanar waveguide structure
Waveguide connects, and three port outfan feeder lines are connected with outfan substrate integration wave-guide by the 3rd coplanar waveguide structure.
The present invention high selectivity balun band filter based on substrate integration wave-guide, described input substrate integration wave-guide
Realize energy by the first plated-through hole perception window with outfan substrate integration wave-guide to couple, input substrate integration wave-guide
Realizing energy by the second plated-through hole perception window and the first substrate integration wave-guide resonator cavity to couple, input substrate is integrated
Waveguide realizes energy by the 3rd plated-through hole perception window and the second substrate integration wave-guide resonator cavity and couples；Outfan substrate
Integrated waveguide realizes energy by the 4th plated-through hole perception window and the first substrate integration wave-guide resonator cavity and couples, substrate collection
Become waveguide to realize energy by fifth metal through hole perception window and the second substrate integration wave-guide resonator cavity to couple.
The present invention high selectivity balun band filter based on substrate integration wave-guide, the first described substrate integration wave-guide is humorous
The chamber that shakes is operated in TE201Pattern, the second substrate integration wave-guide resonator cavity is operated in TE101Pattern.
The present invention high selectivity balun band filter based on substrate integration wave-guide, described input substrate integration wave-guide
With the cut-off frequency of outfan substrate integration wave-guide all between the TE of the first substrate integration wave-guide resonator cavity101Pattern and TE201
Between the resonant frequency of pattern.
The present invention high selectivity balun band filter based on substrate integration wave-guide uses monolayer pcb board to realize, wherein
A diameter of d=0.6mm of plated-through hole, the distance between adjacent two plated-through holes is P=1mm.
Compared with prior art, its remarkable advantage is the present invention: the simple in construction of (1) present invention, can be at monolithic PCB
Realize on plate, it is simple to processing, production cost is low；(2) size of the balun wave filter of the present invention is little, insertion loss is little,
Frequency selectivity is high, output port has matched well performance；(3) the balun wave filter of the present invention has provides constant amplitude anti-
The effect of the filtering in signal, impedance matching and frequency, without re-using resistance when feeding for radio-frequency (RF) component such as balancing antennas
Anti-matching section and wave filter.
Accompanying drawing explanation
Fig. 1 is the top view of the present invention high selectivity balun band filter based on substrate integration wave-guide.
Fig. 2 is the upward view of the present invention high selectivity balun band filter based on substrate integration wave-guide.
Fig. 3 is the topological structure schematic diagram of the present invention high selectivity balun band filter based on substrate integration wave-guide.
Fig. 4 is the physical dimension of the embodiment 1 of the present invention high selectivity balun band filter based on substrate integration wave-guide
Schematic diagram.
Fig. 5 is that the S parameter of the embodiment 1 of the present invention high selectivity balun band filter based on substrate integration wave-guide is imitated
True and test is schemed.
Fig. 6 is two outputs of the embodiment 1 of the present invention high selectivity balun band filter based on substrate integration wave-guide
Port amplitude difference and the emulation of phase contrast and test are schemed.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail.
In conjunction with Fig. 1 and Fig. 2, the present invention high selectivity balun band filter based on substrate integration wave-guide, including input
End feeder line 1, Two-port netwerk outfan feeder line 2, three port outfan feeder line 3, input substrate integration wave-guide 4, outfan
Substrate integration wave-guide the 5, first substrate integration wave-guide resonator cavity the 6, second substrate integration wave-guide resonator cavity 7, medium substrate 8,
Wherein input feeder line 1 and Two-port netwerk outfan feeder line 2 are positioned at the upper surface of medium substrate 8, three port outfan feeder lines
3 lower surfaces being positioned at medium substrate 8, input substrate integration wave-guide 4, outfan substrate integration wave-guide the 5, first substrate
Integrated wave guide resonance chamber the 6, second substrate integration wave-guide resonator cavity 7 is made up of plated-through hole；Input feeder line 1 passes through
First coplanar waveguide structure 14 is connected with input substrate integration wave-guide 4, and Two-port netwerk outfan feeder line 2 is by second altogether
Face waveguiding structure 25 is connected with outfan substrate integration wave-guide 5, and three port outfan feeder lines 3 are by the 3rd co-planar waveguide
Structure 35 is connected with outfan substrate integration wave-guide 5.
The present invention high selectivity balun band filter based on substrate integration wave-guide, described input substrate integration wave-guide
4 realize energy by the first plated-through hole perception window 45 with outfan substrate integration wave-guide 5 couples, input substrate collection
Become waveguide 4 to realize energy by the second plated-through hole perception window 46 with the first substrate integration wave-guide resonator cavity 6 to couple,
Input substrate integration wave-guide 4 is real by the 3rd plated-through hole perception window 47 and the second substrate integration wave-guide resonator cavity 7
Existing energy coupling；Outfan substrate integration wave-guide 5 is by the 4th plated-through hole perception window 65 and the integrated ripple of the first substrate
Leading resonator cavity 6 and realize energy coupling, substrate integration wave-guide 5 is by fifth metal through hole perception window 75 and the second substrate
Integrated wave guide resonance chamber 7 realizes energy coupling.
The present invention high selectivity balun band filter based on substrate integration wave-guide, the first described substrate integration wave-guide is humorous
The chamber 6 that shakes is operated in TE201Pattern, the second substrate integration wave-guide resonator cavity 7 is operated in TE101Pattern.
The present invention high selectivity balun band filter based on substrate integration wave-guide, described input substrate integration wave-guide
4 and the cut-off frequency of outfan substrate integration wave-guide 5 all between the TE of the first substrate integration wave-guide resonator cavity 6101Pattern
And TE201Between the resonant frequency of pattern, by regulation input substrate integration wave-guide 4 and outfan substrate integration wave-guide
The width of 5 adjusts their cut-off frequency.
The topological structure of the present invention high selectivity balun band filter based on substrate integration wave-guide is as it is shown on figure 3, in figure
Solid line represents and just couples, and dotted line represents negative coupling, and S represents source, L+Represent Two-port netwerk output loading end, L-Represent three
Port output loading end, R1Represent the first substrate integration wave-guide resonator cavity 6, R2Represent the second substrate integration wave-guide resonator cavity
7,Represent source and the coefficient of coup of Two-port netwerk output loading end, MSL-Source and the coupling of three port output loading ends
Syzygy number,Represent Two-port netwerk output loading end and the coefficient of coup of the first substrate waveguide resonant cavity 6,Table
Show Two-port netwerk output loading end and the coefficient of coup of the second substrate waveguide resonant cavity 7,Represent three port output loadings
End and the coefficient of coup of the first substrate waveguide resonant cavity 6,Represent three port output loading ends and the second substrate waveguide
The coefficient of coup of resonator cavity 7,Represent the coefficient of coup of source and the first substrate waveguide resonant cavity 6,Represent
Source and the coefficient of coup of the second substrate waveguide resonant cavity 7.
The present invention high selectivity balun band filter based on substrate integration wave-guide, structurally, input feeder line 1,
The width of Two-port netwerk outfan feeder line 2 and three port outfan feeder lines 3 determines according to the impedance of port, is typically designed as 50
The width that ohm microstrip is corresponding；By regulating the first substrate integration wave-guide resonator cavity 6 and the second substrate integration wave-guide resonance
The size in chamber 7 can regulate the position of passband；Source load coupling can be regulated by regulating the first plated-through hole perception window 45
The power closed, thus control the distance of the zero distance passband of passband both sides.
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
In conjunction with Fig. 4, Fig. 5 and Fig. 6, logical to be operated in based on substrate integration wave-guide the high selectivity balun band of X-band
As a example by wave filter, medium substrate 8 relative dielectric constant of employing is 2.2, and thickness is 0.508mm, and loss angle tangent is
0.0009.Input feeder line 1, the characteristic impedance of Two-port netwerk outfan feeder line 2, three port outfan feeder line 3 are 50
Ohm, its width is Wm=1.6mm.Each dimensional parameters of this balun band filter is as follows: the first co-planar waveguide knot
The a length of S of structure 141=2mm, width is W3=2.2mm, the second coplanar waveguide structure 25 and the 3rd co-planar waveguide knot
The length of structure 35 is S2=0.2mm, width is W5=2.2mm, the length of the first substrate integration wave-guide resonator cavity 6
For L1=18.6mm, width is W1=11.4mm, a length of L of the second substrate integration wave-guide resonator cavity 72=27.2mm,
Width is W2=15.3mm, the width of input substrate integration wave-guide 4 and outfan substrate integration wave-guide 5 is
W4=11.4mm, the width of the first plated-through hole perception window 45 is P3=3.7mm, the second plated-through hole perception window
The width of 46 is P4=5mm, the width of the 3rd plated-through hole perception window 47 are P1=5.7mm, the 4th plated-through hole
The width of perception window 65 is P2=5.7mm, the width of the second plated-through hole perception window 75 is P5=5mm, Two-port netwerk is defeated
Going out to hold feeder line is W with the distance of the central transverse axis of balun wave filter6=1mm.A diameter of d=0.6 of plated-through hole
Mm, the distance between adjacent two plated-through holes is P=1mm.
The balun wave filter of the present embodiment is to build in the business full-wave electromagnetic simulation software HFSS.13 of ANSYS company
Imitating genuine, test uses the N5244A Network Analyzer of Agilent company.
Fig. 5 be based on substrate integration wave-guide the high selectivity balun band filter in the present embodiment S parameter emulation and
Test result figure, wherein, dotted line is simulation result, and solid line is test result.Measured result from figure it can be seen that
The passband central frequency of this balun wave filter is 9.99GHz, and relative bandwidth is 1.7%, minimum insertion loss in passband
1.8dB, in passband, return loss is less than-15.3dB；Having two limits in passband, this makes the passband of balun wave filter tend to
Smooth；Additionally, two transmission zeros are positioned at the both sides of passband, respectively appear at 9.78GHz and 10.32GHz, with
Time passband occur at 7.66Ghz by the TE of the first substrate integration wave-guide resonator cavity 7101The passband that pattern produces is pressed down
System, at below-33dB, improves the selectivity of balun wave filter well.
Fig. 6 is two balance output ends of based on substrate integration wave-guide the high selectivity balun band filter in this example
Mouthful amplitude difference and the emulation of phase contrast and test result figure, it can be seen that in this example balun filter passband
Two Differential Output port amplitude differences within 0.2dB, phase contrast is within 180 ± 2 degree.
In sum, the present invention high selectivity balun band filter based on substrate integration wave-guide, there is size little, slotting
Entering to be lost the advantages such as low, selectivity is high, and two output port matching properties are excellent, this balun band filter is highly suitable for
Modern wireless communication systems.
Claims (5)
1. a high selectivity balun band filter based on substrate integration wave-guide, it is characterised in that include input
Feeder line (1), Two-port netwerk outfan feeder line (2), three ports outfan feeder line (3), input substrate integration wave-guide (4),
Outfan substrate integration wave-guide (5), the first substrate integration wave-guide resonator cavity (6), the second substrate integration wave-guide resonator cavity (7),
Medium substrate (8), wherein input feeder line (1) and Two-port netwerk outfan feeder line (2) are positioned at medium substrate (8)
Upper surface, three ports outfan feeder line (3) are positioned at the lower surface of medium substrate (8), input substrate integration wave-guide (4),
Outfan substrate integration wave-guide (5), the first substrate integration wave-guide resonator cavity (6), the second substrate integration wave-guide resonator cavity (7)
It is made up of plated-through hole；Input feeder line (1) is integrated with input substrate by the first coplanar waveguide structure (14)
Waveguide (4) connects, and Two-port netwerk outfan feeder line (2) is by the second coplanar waveguide structure (25) and outfan substrate collection
Becoming waveguide (5) to connect, three ports outfan feeder line (3) are by the 3rd coplanar waveguide structure (35) and outfan substrate
Integrated waveguide (5) connects.
High selectivity balun band filter based on substrate integration wave-guide the most according to claim 1, its feature
It is: described input substrate integration wave-guide (4) is by the first plated-through hole perception window (45) and output end group
Sheet integrated waveguide (5) realizes energy coupling, and input substrate integration wave-guide (4) passes through the second plated-through hole perception window
(46) realizing energy with the first substrate integration wave-guide resonator cavity (6) to couple, input substrate integration wave-guide (4) passes through
3rd plated-through hole perception window (47) realizes energy with the second substrate integration wave-guide resonator cavity (7) and couples；Outfan
Substrate integration wave-guide (5) is by the 4th plated-through hole perception window (65) and the first substrate integration wave-guide resonator cavity (6)
Realizing energy coupling, substrate integration wave-guide (5) is integrated with the second substrate by fifth metal through hole perception window (75)
Waveguide resonant cavity (7) realizes energy coupling.
High selectivity balun band filter based on substrate integration wave-guide the most according to claim 1, its feature
It is: the first described substrate integration wave-guide resonator cavity (6) is operated in TE201Pattern, the second substrate integration wave-guide resonance
Chamber (7) is operated in TE101Pattern.
High selectivity balun band filter based on substrate integration wave-guide the most according to claim 1, its feature
Be: described input substrate integration wave-guide (4) and the cut-off frequency of outfan substrate integration wave-guide (5) all between
The TE of the first substrate integration wave-guide resonator cavity (6)101Pattern and TE201Between the resonant frequency of pattern.
High selectivity balun band filter based on substrate integration wave-guide the most according to claim 1, its feature
It is: described balun band filter uses monolayer pcb board to realize, wherein a diameter of d=0.6mm of plated-through hole,
Distance between adjacent two plated-through holes is P=1mm.
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Cited By (8)
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| CN107069230A (en) * | 2017-01-16 | 2017-08-18 | 东南大学 | A kind of antenna structure and design method |
| CN108011163A (en) * | 2017-11-29 | 2018-05-08 | 加特兰微电子科技(上海)有限公司 | A kind of attenuating structure and test system |
| CN109326863A (en) * | 2018-09-26 | 2019-02-12 | 宁波大学 | A kind of double frequency model filters power splitter based on dielectric substrate integrated waveguide |
| WO2020014891A1 (en) * | 2018-07-18 | 2020-01-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Balun and method for manufacturing the same |
| CN110994110A (en) * | 2019-12-31 | 2020-04-10 | 华南理工大学 | Double-sided output broadband balun power divider based on half-mode substrate integrated waveguide |
| CN111146539A (en) * | 2019-12-19 | 2020-05-12 | 南京理工大学 | Ceramic dielectric waveguide duplexer |
| CN114171876A (en) * | 2021-11-17 | 2022-03-11 | 西安电子科技大学重庆集成电路创新研究院 | Ka-band wide-stop-band filtering power divider |
| CN114843729A (en) * | 2022-04-28 | 2022-08-02 | 南通大学 | Unbalanced to balanced millimeter wave substrate integrated waveguide filtering power divider |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107069230A (en) * | 2017-01-16 | 2017-08-18 | 东南大学 | A kind of antenna structure and design method |
| CN107069230B (en) * | 2017-01-16 | 2023-02-17 | 东南大学 | Antenna structure and design method |
| CN108011163A (en) * | 2017-11-29 | 2018-05-08 | 加特兰微电子科技(上海)有限公司 | A kind of attenuating structure and test system |
| CN108011163B (en) * | 2017-11-29 | 2020-12-29 | 加特兰微电子科技(上海)有限公司 | Attenuation structure and test system |
| WO2020014891A1 (en) * | 2018-07-18 | 2020-01-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Balun and method for manufacturing the same |
| US11405012B2 (en) | 2018-07-18 | 2022-08-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Balun and method for manufacturing the same |
| CN109326863B (en) * | 2018-09-26 | 2020-12-01 | 宁波大学 | Dual-frequency filtering power divider based on dielectric substrate integrated waveguide |
| CN109326863A (en) * | 2018-09-26 | 2019-02-12 | 宁波大学 | A kind of double frequency model filters power splitter based on dielectric substrate integrated waveguide |
| CN111146539A (en) * | 2019-12-19 | 2020-05-12 | 南京理工大学 | Ceramic dielectric waveguide duplexer |
| CN110994110A (en) * | 2019-12-31 | 2020-04-10 | 华南理工大学 | Double-sided output broadband balun power divider based on half-mode substrate integrated waveguide |
| CN114171876A (en) * | 2021-11-17 | 2022-03-11 | 西安电子科技大学重庆集成电路创新研究院 | Ka-band wide-stop-band filtering power divider |
| CN114843729A (en) * | 2022-04-28 | 2022-08-02 | 南通大学 | Unbalanced to balanced millimeter wave substrate integrated waveguide filtering power divider |
| CN114843729B (en) * | 2022-04-28 | 2024-03-19 | 南通大学 | Unbalanced-to-balanced millimeter wave substrate integrated waveguide filtering power divider |
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Application publication date: 20161005 |