CN104900949A - Broadband three-mode balanced band-pass filter based on interdigital multi-mode resonators - Google Patents
Broadband three-mode balanced band-pass filter based on interdigital multi-mode resonators Download PDFInfo
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Abstract
The invention discloses a broadband three-mode balanced band-pass filter based on interdigital multi-mode resonators, comprising a dielectric substrate, an input port feeder, a first output port feeder, a second output port feeder, a first interdigital multi-mode resonator and a second interdigital multi-mode resonator which are arranged on the upper surface of the dielectric substrate, and a metal grounding plate which is disposed on the lower surface of the dielectric substrate. The first interdigital multi-mode resonator and the second interdigital multi-mode resonator are respectively disposed at the two sides of the input port feeder, and are symmetrical stub-loaded multi-mode resonators. The broadband three-mode balanced band-pass filter of the invention has the characteristics of wide stop band, miniaturization, high common-mode rejection, high selectivity, low loss, and the like, and is very suitable for modern wireless communication systems.
Description
Technical field
The present invention relates to microwave passive component technical field, particularly a kind of wideband balance band pass filter based on chiasma type multimode resonator.
Background technology
In recent years, along with modular structural units (Modular Building Block, and monolithic integrated microwave circuit (Monolithic Microwave Integrated Circuit MBB), MMIC) development, low cost, highly integrated, miniaturization have become very important Consideration in modern wireless communication systems Integrated design.Balance filter is an independently microwave passive component, compared to single port filter, has higher ambient noise immunity, better dynamic range, lower electric jamming.Therefore in structure Modern High-Speed wireless communication system, play extremely important effect.It functionally to achieve in radio circuit differential mode signal transmission in free transmission range, and common-mode signal suppresses.
High performance balance filter can not only effectively reduce the size of system, and can simplify the complexity of system, thus realizes low cost, high-performance, the Miniaturization Design of wireless communication system further.
2010, Jin Shi and Quan Xue is at IEEE Transaction.Microwave Theory Technique periodical (vol.58, no.4, pp.970-977,2010) delivering on " Balanced Bandpass Filters Using Center-Loaded Half-Wavelength Resonators ", proposing the method for designing by using 1/2nd wave resonator of center loaded to realize balance filter.Although this method for designing design theory is comparatively simple, because this structure needs to load lamped element, make structure processed complex, error increases.Narrower from the bandwidth of outer designed balance filter, 3dB relative bandwidth only has 8.92%.
2012, Wenjie Feng and Wenquan Che is at IEEE Transaction.Microwave Theory Technique periodical (vol.60, no.6, pp.1560-1568,2012) deliver on " Novel Wideband Differential Bandpass Filters Based on T-Sharped Structure ", propose to realize the Differential Output of signal and the bandpass characteristics of bimodulus based on T-type structure, although this method for designing structure is comparatively simple, but common mode inhibition effect only reaches 14.5 dB, and differential mode Out-of-band rejection is poor.
2013, Paris V é lez, Jordi Naqui, A. Fern á ndez-Prieto, Miguel Dur á n-Sindreu, Jordi Bonache, Jes ú s Martel, Francisco Medina, Ferran Mart í n is at IEEE Microwave And Wireless Components Letters periodical (vol.23, no.1, pp.22-24, 2013) deliver on " Differential Bandpass Filter With Common-Mode Suppression Based on Open Split Ring Resonators and Open Complementary Split Ring Resonators ", propose to be combined open circuit ring and auxiliary open ring carrys out the method for design balance filter.Although this design does not need ground hole, structure is relatively simple.But common mode inhibition is only confined in corresponding differential mode frequency band, and the Out-of-band rejection of common and different mode is all very poor, and insertion loss is large.
Summary of the invention
The object of the invention is to utilize the resonance mechanism of chiasma type multimode resonator and the electric field distribution characteristic of main transmission line to provide a kind of have the characteristics such as Wide stop bands, miniaturization, high common mode inhibition, high selectivity, low-loss, etc. the balancing band bandpass filter of performance.
The technical solution realizing the object of the invention is: a kind of broadband three modal balancing band pass filter based on chiasma type multimode resonator, comprises input port feeder line, the first output port feeder line, the second output port feeder line, the first chiasma type multimode resonator, the second chiasma type multimode resonator, medium substrate, metal ground plate.First chiasma type multimode resonator and the second chiasma type multimode resonator are the multimode resonator that plane of symmetry minor matters load, wherein input port feeder line, the first output port feeder line, the second output port feeder line, the first chiasma type multimode resonator and the second chiasma type multimode resonator are positioned at the upper surface of medium substrate, and metal ground plate is positioned at the lower surface of medium substrate, input port feeder line comprises first input end mouth 50 ohm microstrip conduction band, first input end mouth quarter-wave main transmission line, second input port 50 ohm microstrip conduction band, second input port quarter-wave main transmission line, first output port feeder line comprises the first output port 50 ohm microstrip conduction band and the first output port quarter-wave coupling line, second output port feeder line comprises the second output port 50 ohm microstrip conduction band and the second output port quarter-wave coupling line, first chiasma type multimode resonator comprises the first quarter-wave resonance device, second quarter-wave resonance device, first plane of symmetry minor matters loading unit, second plane of symmetry minor matters loading unit, second chiasma type multimode resonator comprises the 3rd quarter-wave resonance device, 4th quarter-wave resonance device, 3rd plane of symmetry minor matters loading unit, 4th plane of symmetry minor matters load short element.
Second quarter-wave resonance device parallel coupling of described first input end mouth quarter-wave main transmission line and the first chiasma type multimode resonator, the 4th quarter-wave resonance device parallel coupling of the second input port quarter-wave main transmission line and the second chiasma type multimode resonator; First quarter-wave resonance device parallel coupling of the first output port quarter-wave coupling line and the first chiasma type multimode resonator; 3rd quarter-wave resonance device parallel coupling of the second output port quarter-wave coupling line and the second chiasma type multimode resonator.
Described first input end mouth 50 ohm microstrip conduction band and the second input port 50 ohm microstrip conduction band measure-alike; First input end mouth quarter-wave main transmission line and the second input port quarter-wave main transmission line measure-alike; First output port feeder line is identical with the physical dimension of the second output port output feeder line, and the first chiasma type multimode resonator and the second chiasma type multimode resonator are the identical plane of symmetry minor matters of physical dimension and load multimode resonator.
First quarter-wave resonance device and the second quarter-wave resonance device of described first chiasma type multimode resonator are interconnected, first plane of symmetry minor matters loading unit respectively with the first quarter-wave resonance device, the mutual vertical distribution of the second quarter-wave resonance device, second plane of symmetry minor matters load short-circuit unit respectively with the first quarter-wave resonance device, the mutual vertical distribution of the second quarter-wave resonance device; 3rd quarter-wave resonance device and the 4th quarter-wave resonance device of the second chiasma type multimode resonator are interconnected, 3rd plane of symmetry minor matters loading unit respectively with the 3rd quarter-wave resonance device, the mutual vertical distribution of the 4th quarter-wave resonance device, the 4th plane of symmetry minor matters loading unit respectively with the 3rd quarter-wave resonance device, the mutual vertical distribution of the 4th quarter-wave resonance device.
Compared with prior art, its remarkable advantage is in the present invention: (1) structure is simple, and can realize on monolithic pcb board, be convenient to process, production cost is low; (2) very Wide stop bands, broad passband, good differential mode transmission, high common mode inhibition; (3) characteristics such as selectivity is good, insertion loss is little.
Accompanying drawing explanation
Fig. 1 is the broadband three modal balancing band pass filter perspective view that the present invention is based on chiasma type multimode resonator.
Fig. 2 is the broadband three modal balancing band pass filter plan structure schematic diagram that the present invention is based on chiasma type multimode resonator.
Fig. 3 is the physical dimension schematic diagram of the broadband three modal balancing band pass filter embodiment 1 that the present invention is based on chiasma type multimode resonator.
Fig. 4 is the S parameter analogous diagram of the broadband three modal balancing band pass filter embodiment 1 that the present invention is based on chiasma type multimode resonator, the insertion loss S namely under difference mode signal input condition
dd21with return loss S
dd11, the insertion loss S under common-mode signal input condition
cc21.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Composition graphs 1 ~ 2, the present invention is based on the broadband three modal balancing band pass filter of chiasma type multimode resonator, comprise input port feeder line 1, first output port feeder line 2, second output port feeder line 3, first chiasma type multimode resonator 4, second chiasma type multimode resonator 5, medium substrate 6, metal ground plate 7.First chiasma type multimode resonator 4 and the second chiasma type multimode resonator 5 are the multimode resonator that plane of symmetry minor matters load, wherein input port feeder line 1, first output port feeder line 2, second output port feeder line 3, first chiasma type multimode resonator 4 and the second chiasma type multimode resonator 5 are positioned at the upper surface of medium substrate 6, and metal ground plate 7 is positioned at the lower surface of medium substrate 6, input port feeder line 1 comprises first input end mouth 50 ohm microstrip conduction band 11, first input end mouth quarter-wave main transmission line 12, second input port 50 ohm microstrip conduction band 13, second input port quarter-wave main transmission line 14, first output port feeder line 2 comprises the first output port 50 ohm microstrip conduction band 21 and the first output port quarter-wave coupling line 22, second output port feeder line 3 comprises the second output port 50 ohm microstrip conduction band 31 and the second output port quarter-wave coupling line 32, first chiasma type multimode resonator 4 comprises the first quarter-wave resonance device 41, second quarter-wave resonance device 42, first plane of symmetry minor matters loading unit 43, second plane of symmetry minor matters loading unit 44, second chiasma type multimode resonator 5 comprises the 3rd quarter-wave resonance device 51, 4th quarter-wave resonance device 52, 3rd plane of symmetry minor matters loading unit 53, 4th plane of symmetry minor matters loading unit 54.
Described first input end mouth quarter-wave main transmission line 12 and the second quarter-wave resonance device 42 parallel coupling of the first chiasma type multimode resonator 4; 4th quarter-wave resonance device 52 parallel coupling of the second input port quarter-wave main transmission line 14 and the second chiasma type multimode resonator 5; First quarter-wave resonance device 41 parallel coupling of the first output port quarter-wave coupling line 22 and the first chiasma type multimode resonator 4; 3rd quarter-wave resonance device 51 parallel coupling of the second output port quarter-wave coupling line 32 and the second chiasma type multimode resonator 5.
Described first input end mouth 50 ohm microstrip conduction band 11 and the second input port 50 ohm microstrip conduction band 13 measure-alike; First input end mouth quarter-wave main transmission line 12 and the second input port quarter-wave main transmission line 14 measure-alike; First output port feeder line 2 is identical with the physical dimension of the second output port output feeder line 3, and the first chiasma type multimode resonator 4 and the second chiasma type multimode resonator 5 are the identical plane of symmetry minor matters of physical dimension and load multimode resonator.
The described broadband three modal balancing band pass filter based on chiasma type multimode resonator, it is characterized in that: the first quarter-wave resonance device 41 of described first chiasma type multimode resonator 4 and the second quarter-wave resonance device 42 are interconnected, first plane of symmetry minor matters loading unit 43 is the mutual vertical distribution with the first quarter-wave resonance device 41, second quarter-wave resonance device 42 respectively, and the second plane of symmetry minor matters loading unit 44 is the mutual vertical distribution with the first quarter-wave resonance device 41, second quarter-wave resonance device 42 respectively; 3rd quarter-wave resonance device 51 and the 4th quarter-wave resonance device 52 of the second chiasma type multimode resonator 5 are interconnected, 3rd plane of symmetry minor matters loading unit 53 respectively with the 3rd quarter-wave resonance device 51, the 4th quarter-wave resonance device 52 mutually vertical distribution, the 4th plane of symmetry minor matters load short-circuit unit 53 respectively with the 4th quarter-wave resonance device 52, the 4th quarter-wave resonance device 51 vertical distribution mutually.
The present invention is based on the broadband three modal balancing band pass filter of chiasma type multimode resonator, wherein the first quarter-wave resonance device 41 of the first chiasma type multimode resonator 4 and the second chiasma type multimode resonator 5, second quarter-wave resonance device 42, 3rd quarter-wave resonance device 51, the length of the 4th quarter-wave resonance device 52 and width determine the centre frequency position of difference mode signal, regulate the first plane of symmetry minor matters loading unit (43), second plane of symmetry minor matters loading unit 44, 3rd plane of symmetry minor matters loading unit 53, 4th plane of symmetry minor matters loading unit 54 can change the pass band width of difference mode signal, first input end mouth main transmission line 12, first quarter-wave resonance device 41 of the second input port main transmission line l4 and coupling in parallel, the intensity effect that the spacing of the 4th quarter-wave resonance device 52 is coupled to it is larger, the less stiffness of coupling of spacing is larger, amplitude and the phase place goodness of fit of two output ports are higher.
The present invention is based on three modal balancing band pass filters of multimode resonator, undertaken processing corrosion by the metal covering of printed-circuit board manufacturing technology to circuit substrate front and the back side thus metal pattern needed for being formed on manufacturing.
Below in conjunction with specific embodiment, the present invention is described in further detail.
Based on the broadband three modal balancing band pass filter of chiasma type multimode resonator structure as shown in Figure 1, as shown in Figure 2, regarding sizes specification is as shown in Figure 3 for vertical view.Medium substrate 7 relative dielectric constant adopted is 3.55, and thickness is 0.508mm, and loss angle tangent is 0.0035.First input end mouth 50 ohm microstrip conduction band 11, second input port 50 ohm microstrip conduction band 13, first output port 50 ohm microstrip conduction band, the second output port 50 ohm microstrip conduction band, its width is W1=1.2mm.Composition graphs 3, each dimensional parameters of balance filter is as follows: W2=2.3mm, W3=1.4mm, W4=0.6mm, W5=1.3mm, W6=0.6mm, W7=2.5mm, L1=6mm, L2=32.6mm, L3=17.2mm, L4=18.15mm, L5=0.7mm, L6=15.7mm, g=0.2mm.Three mould resonator plane of symmetry minor matters load short-circuit unit metal throuth hole radius 0.3 mm, distance base 0.1mm.The gross area that balance filter does not comprise 50 ohm microstrip conduction bands is 25.5 × 33.9mm2, and corresponding guide wavelength is of a size of 0.34 λ g × 0.45 λ g, and wherein λ g is the guide wavelength that passband central frequency is corresponding.
This example balance filter is modeling and simulating in electromagnetic simulation software HFSS.13.Fig. 4 is the S parameter analogous diagram of balance filter in this example, as can be seen from the figure, this balance filter passband central frequency under difference mode signal is 2.35 GHz, 3 dB relative bandwidths are 15.8%, maximum Insertion Loss 0.5 dB in passband, return loss is lower than 12 dB, and common mode inhibition is higher than 23.6 dB, upper sideband Out-of-band rejection is better than 25 dB until 7 GHz, illustrate the Out-of-band rejection of non-constant width, the right side of nearby pass has a transmission zero to make this example balance filter have good selectivity.
In sum, the present invention is based on the broadband three modal balancing band pass filter of chiasma type multimode resonator, Field distribution characteristic in conjunction with multimode resonator and main transmission line achieves one and has the characteristics such as Wide stop bands, miniaturization, high common mode inhibition, high selectivity, low-loss, and this balance filter is highly suitable for modern wireless communication systems.
Claims (5)
1. based on a broadband three modal balancing band pass filter for chiasma type multimode resonator, it is characterized in that: comprise medium substrate (6), be arranged at the input port feeder line (1) of medium substrate (6) upper surface, the first output port feeder line (2), the second output port feeder line (3), the first chiasma type multimode resonator (4), the second chiasma type multimode resonator (5) and be positioned at the metal ground plate (7) of medium substrate (6) lower surface; First chiasma type multimode resonator (4) and the second chiasma type multimode resonator (5) lay respectively at the both sides of input port feeder line (1), and are the multimode resonator of plane of symmetry minor matters loading.
2. the broadband three modal balancing band pass filter based on chiasma type multimode resonator according to claim 1, it is characterized in that: described input port feeder line (1) comprises first input end mouth 50 ohm microstrip conduction band (11), first input end mouth quarter-wave main transmission line (12), second input port 50 ohm microstrip conduction band (13), second input port quarter-wave main transmission line (14), first output port feeder line (2) comprises the first output port 50 ohm microstrip conduction band (21) and the first output port quarter-wave coupling line (22), second output port feeder line (3) comprises the second output port 50 ohm microstrip conduction band (31) and the second output port quarter-wave coupling line (32), first chiasma type multimode resonator (4) comprises the first quarter-wave resonance device (41), second quarter-wave resonance device (42), first plane of symmetry minor matters loading unit (43), second plane of symmetry minor matters loading unit (44), second chiasma type multimode resonator (5) comprises the 3rd quarter-wave resonance device (51), quarter-wave resonance device (52), 3rd plane of symmetry minor matters loading unit (53), 4th plane of symmetry minor matters loading unit (54).
3. the broadband three modal balancing band pass filter based on chiasma type multimode resonator according to claim 1, is characterized in that: the second quarter-wave resonance device (42) parallel coupling of described first input end mouth quarter-wave main transmission line (12) and the first chiasma type multimode resonator (4); 4th quarter-wave resonance device (52) parallel coupling of the second input port quarter-wave main transmission line (14) and the second chiasma type multimode resonator (5); First quarter-wave resonance device (41) parallel coupling of the first output port quarter-wave coupling line (22) and the first chiasma type multimode resonator (4); 3rd quarter-wave resonance device (51) parallel coupling of the second output port quarter-wave coupling line (32) and the second chiasma type multimode resonator (5).
4. the broadband three modal balancing band pass filter based on chiasma type multimode resonator according to claim 1, is characterized in that: described first input end mouth 50 ohm microstrip conduction band (11) and the second input port 50 ohm microstrip conduction band (13) measure-alike; First input end mouth quarter-wave main transmission line (12) and the second input port quarter-wave main transmission line (14) measure-alike; First output port feeder line (2) is identical with the physical dimension of the second output port output feeder line (3), and the first chiasma type multimode resonator (4) and the second chiasma type multimode resonator (5) are the identical plane of symmetry minor matters of physical dimension and load multimode resonator.
5. the broadband three modal balancing band pass filter based on chiasma type multimode resonator according to Claims 2 or 3, it is characterized in that: described first quarter-wave resonance device (41) and the second quarter-wave resonance device (42) are interconnected, first plane of symmetry minor matters loading unit (43) respectively with the first quarter-wave resonance device (41), second quarter-wave resonance device (42) is vertical distribution mutually, second plane of symmetry minor matters loading unit (44) respectively with the first quarter-wave resonance device (41), second quarter-wave resonance device (42) is vertical distribution mutually, 3rd quarter-wave resonance device (51) and the 4th quarter-wave resonance device (52) are interconnected, 3rd plane of symmetry minor matters load open cell (53) respectively with the 3rd quarter-wave resonance device (51), the 4th quarter-wave resonance device (52) mutually vertical distribution, the 4th plane of symmetry minor matters load short-circuit unit (53) respectively with the 3rd quarter-wave resonance device (51), the 4th quarter-wave resonance device (52) vertical distribution mutually.
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Cited By (11)
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| CN105244573A (en) * | 2015-10-30 | 2016-01-13 | 南京理工大学 | Dual-mode high-performance balance band-pass filter based on E-shaped resonators |
| CN105244582A (en) * | 2015-10-30 | 2016-01-13 | 南京理工大学 | Wideband balun based on microstrip line-slot structure |
| CN105304982A (en) * | 2015-11-20 | 2016-02-03 | 南京理工大学 | Tapped feed dual-mode Balun band-pass filter |
| CN105304984A (en) * | 2015-11-24 | 2016-02-03 | 南京理工大学 | Balance band-pass filter based on interdigital multimode resonators |
| CN107204502A (en) * | 2017-06-23 | 2017-09-26 | 南京理工大学 | The three mould balun bandpass filters based on asymmetric coupling line |
| CN108879043A (en) * | 2018-06-26 | 2018-11-23 | 井冈山大学 | A kind of three modal balancing filters using coupling minor matters load line of rabbet joint resonance structure |
| CN109326855A (en) * | 2018-08-31 | 2019-02-12 | 南京师范大学 | A kind of novel four function filter-divider of broadband |
| WO2019205084A1 (en) | 2018-04-27 | 2019-10-31 | Telefonaktiebolaget Lm Ericsson (Publ) | Radio frequency power amplifier and device |
| CN110429363A (en) * | 2019-08-29 | 2019-11-08 | 南京智能高端装备产业研究院有限公司 | A kind of three passband function filter-dividers based on multimode fork-shaped resonator |
| CN113972456A (en) * | 2021-12-22 | 2022-01-25 | 南京典格通信科技有限公司 | Three-order wide stop band 5G microstrip filter |
| CN116345091A (en) * | 2023-05-26 | 2023-06-27 | 成都航空职业技术学院 | Duplexer based on double-mode branch loading resonator |
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| CN105244582A (en) * | 2015-10-30 | 2016-01-13 | 南京理工大学 | Wideband balun based on microstrip line-slot structure |
| CN105244573A (en) * | 2015-10-30 | 2016-01-13 | 南京理工大学 | Dual-mode high-performance balance band-pass filter based on E-shaped resonators |
| CN105304982A (en) * | 2015-11-20 | 2016-02-03 | 南京理工大学 | Tapped feed dual-mode Balun band-pass filter |
| CN105304984A (en) * | 2015-11-24 | 2016-02-03 | 南京理工大学 | Balance band-pass filter based on interdigital multimode resonators |
| CN107204502B (en) * | 2017-06-23 | 2019-05-07 | 南京理工大学 | The three mould balun bandpass filters based on asymmetric coupling line |
| CN107204502A (en) * | 2017-06-23 | 2017-09-26 | 南京理工大学 | The three mould balun bandpass filters based on asymmetric coupling line |
| WO2019205084A1 (en) | 2018-04-27 | 2019-10-31 | Telefonaktiebolaget Lm Ericsson (Publ) | Radio frequency power amplifier and device |
| EP3785320A4 (en) * | 2018-04-27 | 2021-12-29 | Telefonaktiebolaget LM Ericsson (publ) | Radio frequency power amplifier and device |
| US11621681B2 (en) | 2018-04-27 | 2023-04-04 | Telefonaktiebolaget Lm Ericsson | Radio frequency power amplifier and device |
| CN108879043A (en) * | 2018-06-26 | 2018-11-23 | 井冈山大学 | A kind of three modal balancing filters using coupling minor matters load line of rabbet joint resonance structure |
| CN108879043B (en) * | 2018-06-26 | 2024-04-12 | 井冈山大学 | Three-mode balance filter adopting coupling branch loading slot line resonance structure |
| CN109326855A (en) * | 2018-08-31 | 2019-02-12 | 南京师范大学 | A kind of novel four function filter-divider of broadband |
| CN110429363A (en) * | 2019-08-29 | 2019-11-08 | 南京智能高端装备产业研究院有限公司 | A kind of three passband function filter-dividers based on multimode fork-shaped resonator |
| CN110429363B (en) * | 2019-08-29 | 2021-06-01 | 南京智能高端装备产业研究院有限公司 | Three-passband power division filter based on multimode Y-shaped resonator |
| CN113972456A (en) * | 2021-12-22 | 2022-01-25 | 南京典格通信科技有限公司 | Three-order wide stop band 5G microstrip filter |
| CN116345091A (en) * | 2023-05-26 | 2023-06-27 | 成都航空职业技术学院 | Duplexer based on double-mode branch loading resonator |
| CN116345091B (en) * | 2023-05-26 | 2024-01-26 | 成都航空职业技术学院 | Duplexer based on double-mode branch loading resonator |
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Inventor after: Zhang Gang Inventor after: Cai Chuantao Inventor after: Wang Xuedao Inventor after: Wang Jianpeng Inventor before: Zhang Gang Inventor before: Cai Chuantao Inventor before: Wang Xuedao Inventor before: Wang Jianpeng |
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Application publication date: 20150909 |
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| WD01 | Invention patent application deemed withdrawn after publication |