CN105977600A - Small-size three-passband differential power divider - Google Patents
Small-size three-passband differential power divider Download PDFInfo
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- CN105977600A CN105977600A CN201610482190.4A CN201610482190A CN105977600A CN 105977600 A CN105977600 A CN 105977600A CN 201610482190 A CN201610482190 A CN 201610482190A CN 105977600 A CN105977600 A CN 105977600A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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Abstract
The invention belongs to the technical field of microwave communication, and especially relates to a small-size three-passband differential power divider. The power divider comprises a microstrip dielectric substrate, a metal grounding plate, microstrip feed lines, a defected ground structure, and an isolating resistor. The microstrip dielectric substrate comprises an upper microstrip dielectric substrate and a lower microstrip dielectric substrate. The lower surface of the upper microstrip dielectric substrate is provided with a metal grounding plate, and the upper surface of the upper microstrip dielectric substrate and the lower surface of the lower microstrip dielectric substrate are respectively provided with the microstrip feed lines. The metal grounding plate is provided with the defected ground structure through etching, and the defected ground structure comprises a plurality of complementary opening resonant rings. The complementary opening resonant rings are connected with the microstrip feed lines through an input gas line and an output gap line, wherein the input gas line and the output gap line are symmetrically disposed at two sides. The power divider can be widely used for a multi-frequency communication system in a radio frequency front-end circuit of a wireless communication system, is simple in structure, is low in manufacture cost, is small in size, is wide in working band, and is reliable and durable.
Description
Technical field
The invention belongs to technical field of micro communication, particularly to a kind of miniaturization three passband differential power splitter, present invention can apply to the multi-frequency communication system in wireless communication system RF front-end circuit.
Background technology
In recent years, fast development along with mobile communication technology, one communication system generally requires and is operated in multiple communication pattern, if each pattern all uses a power divider to cause, communication system volume is big, cost is high, and multifrequency power divider can contain multiple communication pattern simultaneously, taking volume little, cost is relatively low, has obtained studying widely.On the other hand, due to differential power splitter, noise there is is good inhibiting effect, it is possible to increase the sensitivity of system, meet the high-quality communicating requirement of Modern Communication System.
Therefore, in order to improve the anti-interference of wireless communication system, can contain multiple communication standard, lot of domestic and international research institution and scholar were devoted to the research of differential power splitter in recent years simultaneously.According to " Bin Xia；Lin-Sheng Wu； Junfa
Mao；A new balanced-to-balanced power divider/combiner, IEEE Transactions on
Microwave Theory and TechniqueS, 2012, pp. 2791-27989 " a kind of based on matrixing the Wilkinson differential power splitter that proposed, this power divider size is relatively big, and working band is narrower.According to " Jin Shi；Kai Xu；Compact differential
Power divider with enhanced bandwidth and in-phase or out-of-phase output ports, Electronics Letters, 2014, pp. 1209-1211 " a kind of differential power splitter utilizing coupling line to realize of being proposed; this power divider Insertion Loss is relatively big, and can not realize multiband operation.Need the three passband differential power splitter that a kind of miniaturization, working band are wide, reliability and durability at present badly.
Summary of the invention
The present invention relates to a kind of miniaturization three passband differential power splitter, in solution prior art, differential power splitter constitutes complexity, size is big, with high costs, working band is narrow and Insertion Loss is compared with big, ruggedness and reliability the highest low problem.
In order to solve the problems referred to above, the technical scheme is that
Miniaturization three passband differential power splitter, including micro-strip medium substrate, metal ground plate, microstrip feed line, defect ground structure and isolation resistance；
Described micro-strip medium substrate includes upper strata micro-strip medium substrate and lower floor's micro-strip medium substrate；Lower surface at upper strata micro-strip medium substrate is provided with described metal ground plate, is provided with microstrip feed line at the upper surface of upper strata micro-strip medium substrate and the lower surface of lower floor's micro-strip medium substrate；
Described microstrip feed line includes being arranged at the side U-shaped Differential Input port of upper strata micro-strip medium substrate upper surface, the first U-shaped difference output port in side and being arranged at the second U-shaped difference output port in side of lower floor's micro-strip medium substrate lower surface；
Described side U-shaped Differential Input port, the first side U-shaped difference output port circuit shape are identical, and the U-shaped difference output port of side U-shaped Differential Input port and the first side is respectively arranged at micro-strip medium substrate upper surface both sides, upper strata the longitudinal center's axial symmetry about micro-strip medium substrate；Described side U-shaped Differential Input port, the first U-shaped difference output port of the U-shaped difference output port in side and the second side are all about the transverse center axial symmetry of micro-strip medium substrate；
Metal ground plate is etched with described defect ground structure；Defect ground structure includes multiple complementary openings resonant ring, multiple complementary openings resonant rings are separate, multiple complementary openings resonant rings are relative to the central point of metal ground plate in surrounding the most mutually nested setting of shape, and the opening direction of multiple complementary openings resonant rings is complementary；Outermost complementary openings resonant ring lateral symmetry is connected with input slot line and output slot line；Input, output slot line Differential Input port U-shaped with side respectively, the first U-shaped difference output port of the U-shaped difference output port in side and the second side are connected；
Overlapping position at the first U-shaped difference output port of the U-shaped difference output port in side and the second side has multiple non-metallic via, all puts into isolation resistance in multiple non-metallic vias.
Described side U-shaped Differential Input port, the first U-shaped difference output port in side are connected with the one of centre section of horizontal microstrip line composition by two sections of 50 parallel longitudinal ohm microstrip；
The second described U-shaped difference output port in side is connected is constituted by 50 ohm microstrip of two sections 90 degree bendings and one section of horizontal microstrip line of centre；
Side U-shaped Differential Input port, the first horizontal microstrip line in the middle of the U-shaped difference output port of the U-shaped difference output port in side and the second side have identical physical dimension, input slot line and output slot line respectively with Differential Input port, the orthogonal connection of horizontal microstrip line of the first U-shaped difference output port of the U-shaped difference output port in side and the second side.
Described defect ground structure includes three complementary openings resonant rings, the complementary openings resonant ring opening upwards of innermost layer, and Open Side Down to be positioned at the complementary openings resonant ring in middle level, outermost complementary openings resonant ring opening upwards.
Described defect ground structure includes three complementary openings resonant rings, and Open Side Down for the complementary openings resonant ring of innermost layer, is positioned at the complementary openings resonant ring opening upwards in middle level, and Open Side Down for outermost complementary openings resonant ring.
Described complementary openings resonant ring is half-wave resonator.
Described input slot line is stepped impedance type slot line with output slot line.
In three complementary openings resonant rings, the left and right sides cabling of each complementary openings resonant ring needs to be designed as linear type or broken line type according to the size that couples between other two complementary openings rings.
Differential signal is inputted by side U-shaped Differential Input port, energy is coupled on three complementary openings resonant rings by side U-shaped Differential Input port with the quadrature component of input slot line, energy is coupled to the first U-shaped difference output port in side through the quadrature component of output slot line with the first U-shaped difference output port in side by differential signal, and energy is coupled to the second U-shaped output port in side through the quadrature component of output slot line with the second U-shaped output port in side by differential signal.
Beneficial effects of the present invention:
1. present invention firstly provides three passband differential power splitter, can be widely applied in multi-band communication systems, there is composition simple, low cost of manufacture, compact size, working band width, the feature such as reliability and durability；
2. the defective unit that the present invention only needs three mutually nested different complementary open-loop resonators to constitute obtains three passband resonance characteristics, and the mid frequency of three passbands is only determined by defective unit, and size is little, compact conformation, it is easy to analyze；
3. the present invention uses microstrip line to turn the transmission structure of slot line to carry out the suppression of common-mode signal, the microstrip feed line symmetrical configuration of balanced type, on difference mode signal impact less and to common-mode signal suppression substantially, be capable of broadband common mode inhibition simultaneously；
4. due to the fact that the separately design of differential-mode portion and common mode part, it is possible to ensure when adjusting differential mode transmission frequency, common mode inhibition not to be affected, simplify design process and the later stage debugging of difference power splitter；
5. the cabling of the present invention each complementary openings resonant ring left and right sides can be designed as linear type or broken line type, different cabling forms can realize coupling sizes different between resonant ring, by controlling the coupling between complementary openings resonant ring and the coupling of slot line and resonant ring, realize the quasi-independent tuning of three pass band widths, simultaneously facilitate regulation split ring resonator length.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention；
Fig. 2 is that the element on the micro-strip medium substrate of upper strata of the present invention constitutes schematic diagram；
Fig. 3 is that the element on lower floor of the present invention micro-strip medium substrate constitutes schematic diagram；
Fig. 4 is differential-mode response S parameter curve and amplitude difference curve chart in the embodiment of the present invention；
Fig. 5 is differential-mode response isolation curve and phase contrast curve chart in the embodiment of the present invention；
Fig. 6 is common-mode response S parameter curve chart in the embodiment of the present invention；
In figure, 1-band medium substrate, 11-upper strata micro-strip medium substrate, 12-lower floor micro-strip medium substrate；
2-metal ground plate；
3-microstrip feed line, 31-side U-shaped Differential Input port, the U-shaped difference output port in 32-the first side, the U-shaped difference output port in 33-the second side；
4-defect ground structure, 41-inputs slot line, 42-complementary openings resonant ring, and 43-exports slot line；
5-isolation resistance.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further detailed,
With reference to Fig. 1, the present invention relates to a kind of miniaturization three passband differential power splitter, including micro-strip medium substrate 1, metal ground plate 2, microstrip feed line 3, defect ground structure 4, isolation resistance 5, wherein:
Micro-strip medium substrate 1 includes upper strata micro-strip medium substrate 11 and lower floor's micro-strip medium substrate 12, upper strata micro-strip medium substrate 11 and lower floor's micro-strip medium substrate 12 all use dielectric constant to be 2.2, thickness be 0.787mm cover copper medium substrate, its a size of 36mm × 24mm.
With reference to Fig. 2, the lower surface of upper strata micro-strip medium substrate 11 has metal ground plate 2, the upper surface of upper strata micro-strip medium substrate 11 is provided with side U-shaped Differential Input port 31 and the U-shaped difference output port in the first side 32 relative to longitudinal axis symmetry, and lower floor's micro-strip medium substrate lower surface is provided with the second U-shaped difference output port in side 33；The U-shaped difference output port in U-shaped Differential Input port the 31, first side, side 32 and the U-shaped difference output port in the second side 33 collectively constitute microstrip feed line 3.The U-shaped difference output port in U-shaped Differential Input port the 31, first side, side 32 and the U-shaped difference output port in the second side 33 are about the transverse center axial symmetry of micro-strip medium substrate 1；
Metal ground plate 2 is etched with defect ground structure 4；The part overlapped at the first U-shaped difference output port in side 32 and the second side U-shaped difference output port 33 has three non-metallic vias, being respectively put into isolation resistance 5 in three non-metallic vias, the placement of isolation resistance 5 increases the isolation between difference output port 32 and difference output port 33.
Side U-shaped Differential Input port 31 and the first U-shaped difference output port in side 32 are connected with one section of middle horizontal microstrip line composition by two sections of 50 parallel longitudinal ohm microstrip；Wherein two sections of vertical 50 parallel ohm microstrip are used for differential signal transmission as U-shaped both sides；One section of middle horizontal microstrip line, as U-shaped base, is used for feeding to the defect ground structure 4 of bottom.With reference to Fig. 3, the second U-shaped difference output port in side 33 is connected with one section of horizontal microstrip line of centre by 50 ohm microstrip of two sections 90 degree bendings and constitutes；One section of microstrip line in the middle of wherein is as U-shaped base, it is used for coupling the differential signal in defect ground structure 4,50 ohm microstrip of two sections 90 degree bendings are used for exporting differential signal as U-shaped both sides, the microstrip line of two sections 90 degree bendings changes the trend of the second U-shaped difference output port in side 33 simultaneously, it is easy to weld sub-miniature A connector, mutually will not conflict with the sub-miniature A connector of the first U-shaped difference output port in side 32；One section of horizontal microstrip line in the middle of second side U-shaped difference output port 33 is in the underface of one section of horizontal microstrip line in the middle of the first side U-shaped difference output port 32, and two sections of horizontal microstrip lines have identical physical dimension.
Defect ground structure 4 includes three complementary openings resonant rings 42, the most outermost complementary openings resonant ring 42 opening upwards, and the most outermost complementary openings resonant ring lateral symmetry is connected with input slot line 41 and output slot line 43；Open Side Down to be positioned at the complementary openings resonant ring in middle level, the complementary openings resonant ring opening upwards of innermost layer.Three complementary openings resonant ring 42 opening directions complementary and separate relative to the central point of metal ground plate 2 in circumferentially surrounding the most mutually nested setting of shape；The horizontal microstrip line on the U-shaped base of input slot line 41 Differential Input U-shaped with side port 31 is orthogonal；Output slot line 43 is orthogonal with the horizontal microstrip line on the U-shaped base of difference output port 32, and output slot line 43 is orthogonal with the horizontal microstrip line on the U-shaped base of the second U-shaped difference output port in side 33 simultaneously, sees Fig. 2.
Differential signal is inputted by side U-shaped Differential Input port 31, energy is coupled on three complementary openings resonant rings 42 by side U-shaped Differential Input port 31 with the quadrature component of input slot line 41, energy is coupled to the first U-shaped difference output port in side 32 through output slot line 43 and the first side U-shaped difference output port 32 quadrature component by differential signal, and energy is coupled to the second U-shaped difference output port in side 33 through output slot line 43 and the second side U-shaped difference output port 33 quadrature component by differential signal simultaneously；Three complementary openings resonant rings 42 are capable of controlling three passband central frequencies and the accurate independent of bandwidth, and defect ground structure ensure that differential mode signal transmission, simultaneously works as the inhibitory action to common-mode signal interference.
The complementary openings resonant ring 42 of the present invention is half-wave resonator, by changing the length of each complementary openings resonant ring, it is achieved the mid frequency independent regulation of three passbands.Change the spacing between each complementary openings resonant ring 42 and can realize the quasi-independent regulation of three pass band widths.
The effect of the present invention can be further illustrated by emulation and test:
A kind of miniaturization three passband differential power splitter of the present invention is emulated by 3 D electromagnetic simulation software HFSS, utilize vector network analyzer that a kind of miniaturization three passband differential power splitter of the present invention carries out the test of material object, the differential-mode response S parameter curve and the differential-mode response isolation curve that obtain this differential power splitter are distinguished the most as shown in Figure 4 and Figure 5, and common-mode response S parameter curve is as shown in Figure 6.
Can be seen that from differential-mode response S parameter curve and the amplitude difference curve of Fig. 4, the mid frequency of three passbands of the present invention three passband differential power splitter is respectively 1.58GHz, 2.5GHz and 3.5GHz, insertion loss is respectively 3.47dB, 3.3dB and 3.9dB, 3dB relative bandwidth is respectively 19.4%, 12.2% and 14.7%, return loss in three passbands all can reach more than 13dB, and the amplitude difference between output port 32 and output port 33 is less than 0.5dB.From differential-mode response isolation curve and the phase contrast curve of Fig. 5 it can be seen that the isolation between the output port 32 of the present invention three passband differential power splitter and output port 33 reaches more than 12dB, phase contrast is less than 2o.Can be seen that from the common-mode response S parameter curve of Fig. 6, the present invention three passband differential power splitter has good broadband common-mode rejection properties, common mode inhibition in whole frequency range can reach 20dB common mode inhibition requirement required in more than 40dB, significantly larger than communication system.All be can be seen that simulation result and the test result goodness of fit are good by Fig. 4-Fig. 6.
In sum, a kind of miniaturization three passband differential power splitter disclosed by the invention, mainly realize the multi-frequency working problem of differential power splitter, including micro-strip medium substrate 1, metal ground plate 2, microstrip feed line 3, defect ground structure 4, isolation resistance 5.Wherein, what upper strata micro-strip medium substrate 11 upper surface was symmetrical is provided with two the identical side of structure U-shaped Differential Input ports 31 and the U-shaped difference output port in the first side 32, lower floor's micro-strip medium substrate 12 lower surface is provided with the second U-shaped difference output port in side 33, and the second U-shaped difference output port in side 33 is in the underface of difference output port 32；The lower surface of upper strata micro-strip medium substrate 11 is metal ground plate 2, metal ground plate 2 etching defect ground structure 4 above, defect ground structure 4 is symmetrical about longitudinal neutral axis of power divider, including three complementary openings resonant rings 42 and input slot line 41 and output slot line 43；Three complementary openings resonant rings 42 are the most mutually nested in surrounding shape relative to the central point of metal ground plate, and input and output slot line is stepped impedance type, to reduce defect ground structure；Have three non-metallic vias at difference output port 32 and difference output port 33 coincidence part office, three non-metallic vias are respectively put into three isolation resistances to increase the isolation between output port 32 and output port 33.
The present invention can the accurate independent mid frequency controlling three differential mode passbands and bandwidth, by controlling the length of each complementary openings resonant ring 42, it is achieved the mid frequency of three passbands independently controls；By changing the spacing between adjacent two complementary openings resonant rings 42, it is achieved the quasi-independent regulation of three pass band widths；By changing width and the width of output slot line 43 of input slot line 41, change length and the length of output slot line 43 of input slot line 41, it is achieved the regulation of the bandwidth of three passbands simultaneously.The present invention is capable of the miniaturization of differential power splitter simultaneously, has good broadband common-mode rejection properties, can be applicable to the multi-frequency communication system in wireless communication system RF front-end circuit.
Present disclosure is not limited to cited by embodiment, and the conversion of any equivalence that technical solution of the present invention is taked by those of ordinary skill in the art by reading description of the invention, the claim being the present invention is contained.
Claims (8)
1. miniaturization three passband differential power splitter, it is characterised in that: include micro-strip medium substrate (1), metal ground plate (2), microstrip feed line (3), defect ground structure (4) and isolation resistance (5)；
Described micro-strip medium substrate (1) includes upper strata micro-strip medium substrate (11) and lower floor's micro-strip medium substrate (12)；Lower surface on upper strata micro-strip medium substrate (11) is provided with described metal ground plate (2), and upper surface and the lower surface of lower floor's micro-strip medium substrate (12) on upper strata micro-strip medium substrate (11) are provided with microstrip feed line (3)；
Described microstrip feed line (3) includes being arranged at the side U-shaped Differential Input port (31) of upper strata micro-strip medium substrate (11) upper surface, the first U-shaped difference output port in side (32) and being arranged at the second U-shaped difference output port in side (33) of lower floor's micro-strip medium substrate (12) lower surface；
Described side U-shaped Differential Input port (31), the first side U-shaped difference output port (32) circuit shape are identical, and side U-shaped Differential Input port (31) and the first side U-shaped difference output port (32) are respectively arranged at micro-strip medium substrate (11) upper surface both sides, upper strata the longitudinal center's axial symmetry about micro-strip medium substrate (1)；Described side U-shaped Differential Input port (31), the first U-shaped difference output port in side (32) and the second side U-shaped difference output port (33) are all about the transverse center axial symmetry of micro-strip medium substrate (1)；
Metal ground plate (2) is etched with described defect ground structure (4)；Defect ground structure (4) includes multiple complementary openings resonant ring (42), multiple complementary openings resonant rings (42) are separate, multiple complementary openings resonant rings (42) are relative to the central point of metal ground plate (2) in surrounding the most mutually nested setting of shape, and the opening direction of multiple complementary openings resonant rings (42) is complementary；Outermost complementary openings resonant ring (42) lateral symmetry is connected with input slot line (41) and output slot line (43)；Input, output slot line Differential Input port (31) U-shaped with side respectively, the first U-shaped difference output port in side (32) and the second side U-shaped difference output port (33) are connected；
Overlapping position in the first U-shaped difference output port in side (32) and the second side U-shaped difference output port (33) has multiple non-metallic via, all puts into isolation resistance (5) in multiple non-metallic vias.
Miniaturization three passband differential power splitter the most according to claim 1, it is characterised in that: described side U-shaped Differential Input port (31), the first U-shaped difference output port in side (32) are connected with one section of middle horizontal microstrip line composition by two sections of 50 parallel longitudinal ohm microstrip；
The the second described U-shaped difference output port in side (33) is connected is constituted by 50 ohm microstrip of two sections 90 degree bendings and one section of horizontal microstrip line of centre；
Side U-shaped Differential Input port (31), the first horizontal microstrip line in the middle of the U-shaped difference output port in side (32) and the second side U-shaped difference output port (33) have an identical physical dimension, input slot line (41) and export slot line (43) respectively with Differential Input port (31), the orthogonal connection of horizontal microstrip line of the first U-shaped difference output port in side (32) and the second side U-shaped difference output port (33).
Miniaturization three passband differential power splitter the most according to claim 1 and 2, it is characterized in that: described defect ground structure (4) includes three complementary openings resonant rings (42), complementary openings resonant ring (42) opening upwards of innermost layer, Open Side Down to be positioned at the complementary openings resonant ring (42) in middle level, outermost complementary openings resonant ring (42) opening upwards.
Miniaturization three passband differential power splitter the most according to claim 1 and 2, it is characterized in that: described defect ground structure (4) includes three complementary openings resonant rings (42), Open Side Down for the complementary openings resonant ring (42) of innermost layer, being positioned at complementary openings resonant ring (42) opening upwards in middle level, Open Side Down for outermost complementary openings resonant ring (42).
5. according to the miniaturization three passband differential power splitter described in claim 3 or 4, it is characterised in that: described complementary openings resonant ring (42) is half-wave resonator.
Miniaturization three passband differential power splitter the most according to claim 5, it is characterised in that: described input slot line (41) is stepped impedance type slot line with output slot line (43).
Miniaturization three passband differential power splitter the most according to claim 6, it is characterized in that: in three complementary openings resonant rings (42), the left and right sides cabling of each complementary openings resonant ring (42) needs to be designed as linear type or broken line type according to the size that couples between other two complementary openings rings (42).
Miniaturization three passband differential power splitter the most according to claim 1, it is characterized in that: differential signal is inputted by side U-shaped Differential Input port (31), energy is coupled on three complementary openings resonant rings (42) by side U-shaped Differential Input port (31) and the quadrature component inputting slot line (41), energy is coupled to the first U-shaped difference output port in side (32) through the quadrature component of output slot line (43) with the first U-shaped difference output port in side (32) by differential signal, energy is coupled to the second U-shaped output port in side (33) through the quadrature component of output slot line (43) with the second U-shaped output port in side (33) by differential signal.
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| CN108270061A (en) * | 2018-01-15 | 2018-07-10 | 西安电子科技大学 | Differential power splitter with filtering characteristic |
| CN109842989A (en) * | 2017-11-24 | 2019-06-04 | 广达电脑股份有限公司 | High speed circuit and its high-speed-differential cable architecture |
| CN112002979A (en) * | 2020-10-10 | 2020-11-27 | 电子科技大学 | Filtering power divider and communication system |
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