CN105826640A - Multi-mode resonator based dual-mode balun bandpass filter - Google Patents
Multi-mode resonator based dual-mode balun bandpass filter Download PDFInfo
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Abstract
The invention discloses a multi-mode resonator based dual-mode balun bandpass filter, which comprises an input end feeder, a two-port output end feeder, a three-port output end feeder, a first multi-mode resonator, a second multi-mode resonator, a dielectric substrate and a metal grounding plate, wherein both the first multi-mode resonator and the second multi-mode resonator are symmetry plane branch loading multi-mode resonators; the input end feeder, the two-port output end feeder, the three-port output end feeder, the first multi-mode resonator and the second multi-mode resonator are located at the upper surface of the dielectric substrate, and the metal grounding plate is located at the lower surface of the dielectric substrate; the first multi-mode resonator comprises two quarter-wavelength resonators and two symmetry plane branch loading units, and the second multi-mode resonators comprises two quarter-wavelength resonators and two symmetry plane branch loading units. The balun bandpass filter disclosed by the invention is simple in structure, low in loss and good in selectivity, and has excellent port matching properties, thereby being extremely applicable to a modern wireless communication system.
Description
Technical field
The present invention relates to microwave passive component technical field, a kind of bimodulus balun band filter based on multimode resonator.
Background technology
In recent years, along with modular structural units (ModularBuildingBlock, and monolithic integrated microwave circuit (MonolithicMicrowaveIntegratedCircuit MBB), MMIC) development, low cost, highly integrated, miniaturization are to have become as very important Consideration in modern wireless communication systems Integrated design.For realizing these design objects, the novel passive microwave device with multifunctional unit characteristic is just becoming the study hotspot outside Present Domestic, and the problem that one of them is the most popular is exactly the design of high-performance balun wave filter.
Balun wave filter is an independent microwave passive component, and it functionally achieves effective combination of radio circuit median filter and balun, say, that the function that the constant amplitude of filtering and power that balun wave filter has had both signal is reversely distributed.Therefore, high performance balun wave filter can not only effectively reduce the size of system, and can the complexity of simplified system design, thus realize the low cost of wireless communication system, high-performance, Miniaturization Design further.
2007, LapKunYeung and Ke-LiWu is at IEEETransaction.MicrowaveTheoryTechnique periodical (vol.55, no.11, pp.2406-2411,2007) deliver on " ADual-BandCoupled-LineBalunFilter ", propose in the theoretical basis of Marchand balun, to combine the resonance characteristic of step electric impedance resonator to realize the method for designing of balun wave filter.Although this method for designing design theory is relatively simple, but owing to this structure introduces step electric impedance resonator so that the narrower bandwidth of designed balun wave filter.Additionally, due to this circuit relates to three line couplings so that zigzag coupled mode must be used to the stiffness of coupling strengthening between step electric impedance resonator and main transmission line, and therefore the structure of this balun wave filter is more complicated, and circuit size is the biggest.
null2007，Eul-YoungJung and Hee-YongHwang is at IEEEMicrowaveWirelessComponentsLetters periodical (vol.17,no.9,pp.652-654,2007) " ABalun-BPFUsingaDualModeRingResonator " is delivered on，Propose on toroidal cavity resonator, be symmetrically positioned two output ports，It is simultaneously introduced the bandpass characteristics of open stub Differential Output and bimodulus to realize signal,But，Owing to this structure introduces stepping impedance，Make structure the most symmetrical，Cause the Differential Output poor-performing of balun wave filter，Simultaneously because be not introduced into capacitive load，The size of this balun wave filter is bigger.
null2008，VicenteGonzález-Posadas,CarlosMartín-Pascual,JoséLuisJiménez-Martín,AndDanielSegovia-Vargas is at IEEETransactionsonAntennasandPropagation periodical (vol.01,no.56,pp.2101-2107,2008) " Lumped-ElementBalunforUHFUWBPrintedBalancedAntennas " is delivered on，The method proposing to design balun wave filter by being collocated with each other between low pass and high pass filter.Although the balun of this method for designing design has, in low-frequency range, an advantage that volume is little, but due to the highest shortcoming of the correlation properties of lamped element, its most lossy big, narrower bandwidth and amplitude and the phase place goodness of fit.
Summary of the invention
It is an object of the invention to the electric field distribution characteristic utilizing the main transmission line of the resonance mechanism of multimode resonator and open-end to provide a kind of simple in construction, be lost low, selectivity good, has the bimodulus balun band filter of preferable port match performance.
The technical solution realizing the object of the invention is: a kind of bimodulus balun band filter based on multimode resonator, including input feeder line, Two-port netwerk outfan feeder line, three port outfan feeder lines, the first multimode resonator, the second multimode resonator, medium substrate, metal ground plate, the first multimode resonator and the second multimode resonator are the multimode resonator that plane of symmetry minor matters load；Wherein input feeder line, Two-port netwerk outfan feeder line, three port outfan feeder lines, the first multimode resonator and the second multimode resonator are positioned at the upper surface of medium substrate, and metal ground plate is positioned at the lower surface of medium substrate；First multimode resonator comprises the first quarter-wave resonance device, the second quarter-wave resonance device, the first plane of symmetry minor matters loading unit, the second plane of symmetry minor matters loading unit, and the second multimode resonator comprises the 3rd quarter-wave resonance device, the 4th quarter-wave resonance device, the 3rd plane of symmetry minor matters loading unit, the 4th plane of symmetry minor matters loading unit.
Described input feeder line includes the main transmission line of a wavelength of input 50 ohm microstrip conduction band and open-end；Two-port netwerk outfan feeder line includes Two-port netwerk outfan 50 ohm microstrip conduction band and Two-port netwerk outfan quarter-wave coupling line；Three port outfan feeder lines include three port outfan 50 ohm microstrip conduction bands and three port outfan quarter-wave coupling lines；The main transmission line of one wavelength of input at the first quarter-wave resonance device parallel coupling of quarter-wave strong point and first multimode resonator of distance Single port feed point, the main transmission line of one wavelength of input at 3/4ths wavelength of distance Single port feed point with the 4th quarter-wave resonance device parallel coupling of the second multimode resonator；Two-port netwerk outfan quarter-wave coupling line and the second quarter-wave resonance device parallel coupling of the first multimode resonator；Three port outfan quarter-wave coupling lines and the 3rd quarter-wave resonance device parallel coupling of the second multimode resonator.
The physical dimension of described Two-port netwerk outfan feeder line and three port outfan feeder lines is identical, and the first multimode resonator and the second multimode resonator are the multimode resonator that the identical plane of symmetry minor matters of physical dimension load.
First quarter-wave resonance device and the second quarter-wave resonance device of described first multimode resonator are mutually perpendicular to, first plane of symmetry minor matters loading unit, second plane of symmetry minor matters loading unit is connected with each other, and respectively with the first quarter-wave resonance device, second quarter-wave resonance device become 45 degree angular distribution, 3rd quarter-wave resonance device of the second multimode resonator, 4th quarter-wave resonance device is mutually perpendicular to, 3rd plane of symmetry minor matters loading unit, 4th plane of symmetry minor matters loading unit is connected with each other, and respectively with the 3rd quarter-wave resonance device, 4th quarter-wave resonance device become 45 degree angular distribution.
Compared with prior art, its remarkable advantage is the present invention: (1) simple in construction, can realize, it is simple to process, production cost is low on monolithic pcb board；(2) have the effect of the filtering in constant amplitude reverse signal, impedance matching and frequency be provided, for during the radio-frequency (RF) component feeds such as balancing antenna without re-using impedance matching section and wave filter；(3) selectivity is good, insertion loss is little, output port has the characteristics such as matched well performance.
Accompanying drawing explanation
Fig. 1 is the perspective view of present invention bimodulus based on multimode resonator balun band filter.
Fig. 2 is the plan structure schematic diagram of present invention bimodulus based on multimode resonator balun band filter.
Fig. 3 is the physical dimension schematic diagram of present invention bimodulus based on multimode resonator balun band filter embodiment 1.
Fig. 4 is the S parameter analogous diagram of present invention multimode based on multimode resonator balun band filter embodiment 1.
Fig. 5 is the analogous diagram of two output port amplitude differences of present invention bimodulus based on multimode resonator balun band filter embodiment 1.
Fig. 6 is the analogous diagram of two output port phase contrasts of a kind of bimodulus balun band filter embodiment 1 based on multimode resonator of the present invention.
Detailed description of the invention
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings.
In conjunction with Fig. 1～2, present invention bimodulus based on multimode resonator balun band filter, including input feeder line 1, Two-port netwerk outfan feeder line 2, three port outfan feeder line the 3, first multimode resonator the 4, second multimode resonator 5, medium substrate 6, metal ground plate 7, the first multimode resonator 4 and the second multimode resonator 5 are the multimode resonator that plane of symmetry minor matters load；Wherein input feeder line 1, Two-port netwerk outfan feeder line 2, three port outfan feeder line the 3, first multimode resonator 4 and the second 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；First multimode resonator 4 comprises first quarter-wave resonance device the 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, and the second multimode resonator 5 comprises the 3rd quarter-wave resonance device the 51, the 4th quarter-wave resonance device the 52, the 3rd plane of symmetry minor matters loading unit the 53, the 4th plane of symmetry minor matters loading unit 54.
Described input feeder line 1 includes the main transmission line 12 of a wavelength of input 50 ohm microstrip conduction band 11 and open-end；Two-port netwerk outfan feeder line 2 includes Two-port netwerk outfan 50 ohm microstrip conduction band 21 and Two-port netwerk outfan quarter-wave coupling line 22；Three port outfan feeder lines 3 include three port outfan 50 ohm microstrip conduction band 31 and three port outfan quarter-wave coupling lines 32；The main transmission line 12 of one wavelength of input at the first quarter-wave resonance device 41 parallel coupling of quarter-wave strong point and first multimode resonator 4 of distance Single port feed point, the main transmission line 12 of one wavelength of input at 3/4ths wavelength of distance Single port feed point with the 4th quarter-wave resonance device 52 parallel coupling of the second multimode resonator 5；Two-port netwerk outfan quarter-wave coupling line 22 and the second quarter-wave resonance device 42 parallel coupling of the first multimode resonator 4；Three port outfan quarter-wave coupling lines 32 and the 3rd quarter-wave resonance device 51 parallel coupling of the second multimode resonator 5.
Described Two-port netwerk outfan feeder line 2 is identical with the physical dimension of three port outfan feeder lines 3, and the first multimode resonator 4 is the multimode resonator that the identical plane of symmetry minor matters of physical dimension load with the second multimode resonator 5.
First quarter-wave resonance device 41 of described first multimode resonator 4 and the second quarter-wave resonance device 42 are mutually perpendicular to, first plane of symmetry minor matters loading unit 43, second plane of symmetry minor matters loading unit 44 is connected with each other, and respectively with the first quarter-wave resonance device 41, second quarter-wave resonance device 42 become 45 degree angular distribution, 3rd quarter-wave resonance device 51 of the second multimode resonator 5, 4th quarter-wave resonance device 52 is mutually perpendicular to, 3rd plane of symmetry minor matters loading unit 53, 4th plane of symmetry minor matters loading unit 54 is connected with each other, and respectively with the 3rd quarter-wave resonance device 51, 4th quarter-wave resonance device 52 become 45 degree angular distribution.
Present invention bimodulus based on multimode resonator balun band filter, wherein the first multimode resonator 4 and the first quarter-wave resonance device 41 of the second multimode resonator 5, second quarter-wave resonance device 42, 3rd quarter-wave resonance device 51, the length and width of the 4th quarter-wave resonance device 52 determines the position of passband, 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 position of two patterns, so that passband is more smooth；The spacing of the main transmission line 12 of one wavelength of input and the first quarter-wave resonance device the 41, the 4th quarter-wave resonance device 52 of coupling in parallel is bigger to its intensity effect coupled, the least stiffness of coupling of spacing is the biggest, and amplitude and the phase place goodness of fit of two output ports are the highest.
Present invention bimodulus based on multimode resonator balun band filter, the metal pattern needed for the metal covering in circuit substrate front and the back side being processed corrosion thus formed by printed-circuit board manufacturing technology on manufacturing.
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
The structure of bimodulus balun band filter based on multimode resonator as it is shown in figure 1, top view as in figure 2 it is shown, relevant dimensions as shown in Figure 3.Medium substrate 7 relative dielectric constant used is 3.38, and thickness is 0.635mm, and loss angle tangent is 0.0035.The characteristic impedance of input 50 ohm microstrip conduction band 11, Two-port netwerk outfan 50 ohm microstrip conduction band 21 and three port outfan 50 ohm microstrip conduction bands 31 is 50 ohm, and its width is W1=1.4mm.In conjunction with Fig. 3, each dimensional parameters of balun wave filter is as follows: W1=1.4mm, L1=4mm, W2=1.2mm, L2=69mm, W3=1.4mm, L3=4mm, W4=0.7mm, L4=14.35mm, W5=0.7mm, L5=28.3mm, W6=0.6mm, L6=1.2mm, W7=1.6mm, L7=2.6mm, S1=0.1mm, S2=0.1mm.The entire area of balun wave filter is 35 × 75mm, corresponding guide wavelength a size of 0.75 λg×1.63λg, wherein λgFor the guide wavelength that passband central frequency is corresponding.
This example balun wave filter modeling and simulating in electromagnetic simulation software HFSS.13.Fig. 4 is the S parameter analogous diagram of balun wave filter in this example, it can be seen that the passband central frequency of this balun wave filter is 3.45GHz, relative bandwidth is 17.4%, and in passband, return loss is less than 15dB.Four transmission zeros are had to make this example balun wave filter have good selectivity outside passband respectively.
Fig. 5 is two Differential Output port amplitude differences of balun wave filter in this example, it can be seen that two Differential Output port amplitude differences in this example balun filter passband are within 0.4dB.
Fig. 6 is two Differential Output port phase contrasts of balun wave filter in this example, it can be seen that two Differential Output port phase contrasts in this example balun filter passband are within 180 ± 5 degree.
In sum, present invention bimodulus based on multimode resonator balun band filter, in conjunction with the Field distribution characteristic of multimode resonator and the transmission line of open-end achieve a kind of simple in construction, be lost low, selectivity good, has the bimodulus balun band filter of preferable port match performance, this balun wave filter is highly suitable for modern wireless communication systems.
Claims (4)
1. a bimodulus balun band filter based on multimode resonator, it is characterized in that: include input feeder line (1), Two-port netwerk outfan feeder line (2), three ports outfan feeder line (3), the first multimode resonator (4), the second multimode resonator (5), medium substrate (6), metal ground plate (7), the first multimode resonator (4) and the second multimode resonator (5) are the multimode resonator that plane of symmetry minor matters load；Wherein input feeder line (1), Two-port netwerk outfan feeder line (2), three ports outfan feeder line (3), the first multimode resonator (4) and the second 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)；First multimode resonator (4) comprises the first quarter-wave resonance device (41), the second quarter-wave resonance device (42), first plane of symmetry minor matters loading unit (43), second plane of symmetry minor matters loading unit (44), and the second multimode resonator (5) comprises the 3rd quarter-wave resonance device (51), the 4th quarter-wave resonance device (52), the 3rd plane of symmetry minor matters loading unit (53), the 4th plane of symmetry minor matters loading unit (54).
Bimodulus balun band filter based on multimode resonator the most according to claim 1, it is characterised in that: described input feeder line (1) includes the main transmission line (12) of a wavelength of input 50 ohm microstrip conduction band (11) and open-end；Two-port netwerk outfan feeder line (2) includes Two-port netwerk outfan 50 ohm microstrip conduction band (21) and Two-port netwerk outfan quarter-wave coupling line (22)；Three ports outfan feeder line (3) include three port outfans 50 ohm microstrip conduction band (31) and three ports outfan quarter-wave coupling line (32)；The main transmission line (12) of one wavelength of input at the first quarter-wave resonance device (41) parallel coupling of quarter-wave strong point and first multimode resonator (4) of distance Single port feed point, the main transmission line (12) of one wavelength of input at 3/4ths wavelength of distance Single port feed point with the 4th quarter-wave resonance device (52) parallel coupling of the second multimode resonator (5)；Two-port netwerk outfan quarter-wave coupling line (22) and the second quarter-wave resonance device (42) parallel coupling of the first multimode resonator (4)；Three ports outfan quarter-wave coupling line (32) and the 3rd quarter-wave resonance device (51) parallel coupling of the second multimode resonator (5).
Bimodulus balun band filter based on multimode resonator the most according to claim 1, it is characterized in that: described Two-port netwerk outfan feeder line (2) is identical with the physical dimension of three ports outfan feeder line (3), the first multimode resonator (4) is the multimode resonator that the identical plane of symmetry minor matters of physical dimension load with the second multimode resonator (5).
nullBimodulus balun band filter based on multimode resonator the most according to claim 2，It is characterized in that: the first quarter-wave resonance device (41) and the second quarter-wave resonance device (42) of described first multimode resonator (4) are mutually perpendicular to，First plane of symmetry minor matters loading unit (43)、Second plane of symmetry minor matters loading unit (44) is connected with each other，And respectively with the first quarter-wave resonance device (41)、Second quarter-wave resonance device (42) one-tenth 45 degree is angular distribution，3rd quarter-wave resonance device (51) of the second multimode resonator (5)、4th quarter-wave resonance device (52) is mutually perpendicular to，3rd plane of symmetry minor matters loading unit (53)、4th plane of symmetry minor matters loading unit (54) is connected with each other，And respectively with the 3rd quarter-wave resonance device (51)、4th quarter-wave resonance device (52) one-tenth 45 degree is angular distribution.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106848503A (en) * | 2017-03-24 | 2017-06-13 | 中国振华集团云科电子有限公司 | Film filter and film filter manufacture method |
| CN107256997A (en) * | 2017-06-09 | 2017-10-17 | 南京理工大学 | Ultra wide band balun wave filter based on the line of rabbet joint |
| CN107369899A (en) * | 2017-07-18 | 2017-11-21 | 华南理工大学 | Based on multimode resonator filter antenna array |
| CN113871830A (en) * | 2020-06-30 | 2021-12-31 | 富华科精密工业（深圳）有限公司 | Balun structure and electronic device with same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1983712B (en) * | 2005-12-16 | 2010-05-19 | 财团法人工业技术研究院 | Balance to non-balance transducer with filter function |
| CN203351719U (en) * | 2013-06-24 | 2013-12-18 | 南京航空航天大学 | Ultra wideband micro-strip balance filter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106848503A (en) * | 2017-03-24 | 2017-06-13 | 中国振华集团云科电子有限公司 | Film filter and film filter manufacture method |
| CN107256997A (en) * | 2017-06-09 | 2017-10-17 | 南京理工大学 | Ultra wide band balun wave filter based on the line of rabbet joint |
| CN107369899A (en) * | 2017-07-18 | 2017-11-21 | 华南理工大学 | Based on multimode resonator filter antenna array |
| CN107369899B (en) * | 2017-07-18 | 2023-03-21 | 华南理工大学 | Filtering antenna array based on multi-mode resonator |
| CN113871830A (en) * | 2020-06-30 | 2021-12-31 | 富华科精密工业（深圳）有限公司 | Balun structure and electronic device with same |
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