CN101656343B - Power divider with new structure - Google Patents
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- CN101656343B CN101656343B CN 200910164400 CN200910164400A CN101656343B CN 101656343 B CN101656343 B CN 101656343B CN 200910164400 CN200910164400 CN 200910164400 CN 200910164400 A CN200910164400 A CN 200910164400A CN 101656343 B CN101656343 B CN 101656343B
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Abstract
The present invention discloses a power divider, wherein a transmission line includes a sub-2 connector, two branch ports of the connector are connected to two output main branches separately, more than two branch lines for communicating the two output main branches are arranged between two output main branches, the branches are designed so that a difference of a sum of a path from a node A to a node B11 and a path from the node A to a node B12, and a path from the node B11 to the node B12 is (Lambadaj/2)*(2p +1) + (Lambadaj/2)*Zeta, and the branches of other nodes are designed so that a difference of a sum of a path from a node Bk1 to a node B(k-1)1 and a path from the node B(k-1)1 to a node B(k-1)2 as well as a path from the node B(k-1)2 to a node Bk2, and a path from the node Bk1 to the node Bk2 is (Lambadai/2)*(2m+1) + (Lambadai/2) * Delta. The output and input of the invention are matched well, there is a good separation between two output ends, and overcomes autoeciousness effects of Wilkinson power divider caused by insulation electric resistances and a problem that a phase of a signal outputted from a directly-connecting end is inconsistent to that of a signal outputted from a coupling end of a branch line electric bridge power divider.
Description
Technical field
The present invention relates to microwave transmission device, more specifically, relate to a kind of microwave transmission power divider.
Background technology
Power divider (abbreviation power splitter) is that input power is divided into a kind of multiport microwave device equal or output of unequal several roads power.In radio frequency systems such as microwave and millimeter wave, all need to launch or to accept power and be assigned to each unit according to a certain percentage, so the microwave and millimeter wave power splitter obtained number of applications in microwave and millimeter wave assembly and system, and be the parts of a key.Power splitter has multiple way of realization, like the power divider of multiple structures such as various 3dB electric bridge couplers, branch line electric bridge coupler, ring-shape bridge coupler, Wilkinson power splitter.The building blocks of function of power splitter is the transmission line of constraint or the transmission of guide electromagnetic waves energy directional; It is navigation system; Guided wave promptly refers to whole or most electromagnetic waves that receive the boundary constraint of transmission line conductors or medium, in the limited cross section of transmission line, transmit along definite direction (being generally axially) of energy; The pattern of guided wave; Be called transmission mode, normal mode again, being meant can be along the transmission line self-existent field pattern of uniting, and guided mode two leads distance between the homophase plane to be called the guide wavelength λ of this guided mode mutually in the transmission line
g, be one with the closely-related parameter of transmission line structure.
Fig. 1 is the transmission line structure of prior art Wilkinson power splitter, and the first transmission line section W of transmission line is connected on and closes road port, and its characteristic impedance is Z
0, the second transmission line section Y1 and Y2 are connected on the branch road port, and its characteristic impedance all is Z
0, the length of transmission line section X1 and X2 is λ
g/ 4, its characteristic impedance does
One isolation resistance R is connected between the intersection point of intersection point and X2, Y2 of transmission line section X1, Y1, and resistance is 2Z
0, under the ideal situation, require the size of isolation resistance minimum, promptly electrical length (electrical length refers to the guide wavelength to be the length of transmission line that unit calculates) can be ignored, and is the radio frequency pure resistance, has no distributed constant.But the actual really not so ideal of Wilkinson power splitter transmission line.The place that it is not enough is: when (1) Wilkinson power splitter is applied to high-power situation, require the dissipation power of isolation resistance big, so the volume of resistance is also bigger.The price of this high-power RF resistance is higher, and needs manual being installed on the shielding construction spare, so complex manufacturing, and the product quality of manual production is restive; When (2) the Wilkinson power splitter is applied to higher frequency band; Wavelength will be intended with the size compared of isolation resistance; Then can not ignore the distributed constant that the isolation resistance place exists, and distributed constant is difficult to prediction when the power splitter design of Simulation, and final testing result is had very big influence.Though can replace Chip-R with film resistor in the prior art, the distributed constant that exists at the film resistor place is less, exists the problem of film resistor resistance calculation deviation and its manufacturing cost higher.In order to overcome this defective; Existing people improves existing Wilkinson power power splitter; Wilkinson power splitter after the improvement (application number 200410052275.6) is though avoided the use isolation resistance; But because the restriction of self structure, it is only better at certain Frequency point and this frequency odd multiple number of frequency place operating characteristic.
Fig. 2 is the structural representation of another kind of power splitter transmission line, and the merit branch of transmission line adopts three-dB coupler to realize, is a kind of power splitter transmission line of one-to-two structure.Signal gets into coupler from input, is connected to when isolation end under the situation of a build-out resistor, and signal is respectively from straight-through end and coupled end output.Fig. 3 is a kind of branch line electric bridge power splitter transmission line, and it is a kind of concrete form of power splitter transmission line shown in Figure 2.It is made up of two ribbon feeders (be made up of transmission line section S1, T1, U1, another is made up of S2, T2, U2), realizes coupling through branch line V1, V2.
Wherein, transmission line section S1, S2, U1 and U2 link to each other with coupled end with input, isolation end, straight-through end respectively, and their characteristic impedances separately all are Z
0T1, T2 length all are λ
g/ 4, characteristic impedance all does
V1 is connected between the intersection point of intersection point and S2, T2 of S1, T1, and V2 is connected between the intersection point of intersection point and U2, T2 of U1, T1, and V1, V2 length all are λ
g/ 4, characteristic impedance all is Z
0Wavelength is λ
gSignal when input is imported; Through S1 → T1 → U1 → straight-through end, through S1 → T1 → V2 → U2 → coupled end, also can be through S1 → V1 → T2 → U2 → coupled end; Thereby input signal than having transmitted path V2 (or T2) from straight-through end output, has promptly transmitted λ from coupled end output more more
g/ 4 long distances, therefore from the signal of straight-through end output with from having 90 to spend phase differences between the signal of coupled end output.Signal differs V2+T2, i.e. λ through S1 → T1 → V2 → T2 → S2 → isolation end with through S1 → V1 → S2 → isolation end institute through the path
g/ 2, therefore bring out no-output in isolation, reach the isolation of input signal at this port.Symmetry by this structure knows that this straight-through end and coupled end are λ for guide wavelength
gSignal also have preferably and to isolate, therefore, with the branch line electric bridge during as power splitter; Though its input and output have better standing wave performance, and export to have preferably and isolate, it has following shortcoming: actual of the one-to-two power splitter that (1) is designed needs three ports; And it has four ports; And isolation end requires the coupling isolation resistance, if isolation end does not connect isolation resistance (or navigation system equivalent with isolation resistance), then other each ports can not be realized good standing wave performance; When realizing this structure with waveguide, have good matching in order to realize isolation end, the isolation end place that is everlasting is provided with absorbing material, must increase the insertion loss of branch line electric bridge like this; (2) from the signal of straight-through end output and from the 90 degree phase differences of having an appointment between the signal of coupled end output, realize exporting same-phase, must add a corresponding phase shifter at straight-through end; (3) in the ideal case, input and isolation end are just isolated fully, and promptly in not output of isolation end, therefore for the branch line electric bridge of reality, its isolation end has increased it and inserted loss.
Summary of the invention
Deficiency to the existence of prior art power splitter transmission line; The object of the invention aims to provide a kind of power splitter of new structure; Overcoming the parasitic effects that the Wilkinson power splitter is caused by isolation resistance, and the inconsistent problem of phase place between the signal exported by the signal of straight-through end output and coupled end of branch line electric bridge power splitter.
General thought of the present invention: on the main branch road of output of Y joint or T joint, branch line is set; Make to reach between each branch line and one-to-two joint between each branch line and form closed circuit; Through adjusting the length of each branch line; The position of each branch line on the output main line, the impedance magnitude in the impedance magnitude of each branch line and main highway section of corresponding output realize that power splitter has output preferably to isolate and good input and output coupling.
The power splitter of new structure disclosed by the invention; Its transmission line comprises the one-to-two joint; The road port that closes of joint connects the input branch road; Two fens road ports of joint connect the main branch road of two outputs respectively; Two outputs are designed with the branch line of the main branch road of connection two outputs that is no less than 2 between the main branch road, and branch line is by 11 adding from node A to Node B 12 path and be (λ j/2) * (2p+1)+(λ j/2) * ζ design with path difference from Node B 11 to Node B 12 from node A to Node B, and the branch line of other nodes is by (k-1) 1 adds node B (k-1) 1 and be (λ i/2) * (2m+1)+(λ i/2) * δ design to the difference that Node B (k-1) 2 adds the path of node B (k-1) 2 to Node B k2 and path from Node B k1 to Node B k2 again from Node B k1 to Node B; Wherein, λ j is the corresponding guide wavelength of Frequency point fj in the bandwidth of operation, and p is the natural number less than 30 ,-1＜ζ＜1; λ i is the corresponding guide wavelength of Frequency point fi in the bandwidth of operation, and m is the natural number less than 30, and k is more than or equal to 1 and smaller or equal to the bar number of branch line ,-1＜δ＜1.
In order to obtain better effect, the present invention has also further taked following technical measures on the basis of technique scheme.
The branch line that is communicated with the main branch road of two outputs generally is designed to 2～10.The bar number of branch line is many more, power splitter output isolation and input and output matching effect better, but make also trouble more of debugging, so branch's number of lines is paid the utmost attention to and is adopted 2～10.
11 path equals from node A to Node B 12 path from node A to Node B.
The main branch road of two outputs is a symmetric design, also can be asymmetrical design.When the main branch road of two outputs was symmetric design, power splitter was the five equilibrium power splitter, and when the main branch road of two outputs was asymmetrical design, power splitter was not five equilibrium power splitter.The own scope of application is respectively arranged.
Branch line length between the main branch road of two outputs is less than the corresponding guide wavelength of power splitter centre frequency.
Said transmission line can be microstrip transmission line, waveguide transmission line or strip transmission line.
The overall structure of power splitter transmission line; Can be designed to constitute from input to two output branch road straight parallel end by rectangular section, trapezoidal sections and rectangular section; Branch line design with rectangular section that output is connected in; Also can be designed to constitute by rectangular section, ladder trapezoidal sections and rectangular section, branch line design with rectangular section that output is connected in.
Design process of the present invention is explained with power splitter transmission line structure sketch map of the present invention shown in Figure 6.Transmission line is also referred to as navigation system, and solid line is navigation system shown in the figure, i.e. the path of signal transmission.Navigation system is meant that its concrete form comprises TEM or accurate TEM transmission line and waveguide in order to the structure of constraint or the transmission of guide electromagnetic waves energy directional, and wherein TEM or accurate TEM transmission line comprise microstrip line, strip line and coaxial line.Among the figure each section solid line is represented each section transmission line respectively, and by the intersection point signal of solid line, each intersection point is with the letter representation among the figure respectively for the interface of each section transmission line.The general structure of power splitter transmission line comprises the one-to-two joint; One input branch road and the main branch road of two outputs; Exporting main branch road one is: A → B11 → B21 → B31 → ... → B (k-1) 1 → Bk1 ... → B (n-1) 1 → Bn1 → 2; Exporting main branch road two is: A → B12 → B22 → B32 → ... → B (k-1) 2 → Bk2 ... → B (n-1) 2 → Bn2 → 3; And be arranged on the main branch road one of output and export the n bar branch line (Bk1Bk2) between the main branch road two, wherein, k is smaller or equal to the number of lines n of branch more than or equal to 1.Export each segmentation AB11 on the main branch road one, B11B21, B21B31 ..., B (k-1) 1Bk1 ... The normalized characteristic impedance that B (n-1) 1Bn1 is corresponding is respectively H11, H21, and H31 ..., H (k-1) 1, Hk1;, H (n-1) 1, Hn1, the corresponding length of each segmentation is expressed as AB11, B11B21 respectively; B21B31 ..., B (n-1) 1Bn1 ..., B (n-1) 1Bn1; Export each segmentation AB12 on the main branch road two, B12B22, B22B32 ..., B (k-1) 2Bk2 ... The normalized characteristic impedance that B (n-1) 2Bn2 is corresponding is respectively H12, H22, and H32 ..., H (k-1) 2, Hk2;, H (n-1) 2, Hn2, the corresponding length of each segmentation is expressed as AB12, B12B22 respectively; B22B32 ..., B (k-1) 2Bk2 ..., B (n-1) 2Bn2; Branch line B11B12, B21B22, B31B3 ... B (k-1) 1B (k-1) 2, Bk1Bk2 ... B (n-1) 1B (n-1) 2, the normalized characteristic impedance that Bn1Bn2 is corresponding is respectively G1; G2, G3 ..., G (k-1), Gk;, G (n-1), Gn, corresponding length is expressed as B11B12, B21B22 respectively; B31B32 ... B (k-1) 1B (k-1) 2, Bk1Bk2 ... B (n-1) 1B (n-1) 2, Bn1Bn2.
In the drawings, the input of the said power splitter transmission line of 1 expression, 2,3 represent the output one and the output two of said power splitter transmission line respectively, signal is divided into two paths of signals through one-to-two joint 4 after being imported by input 1, through the main branch road output of two outputs.
Isolation between two outputs realizes as follows: branch line B (k-1) 1B (k-1) 2 suitably is set; Segmentation B (k-1) 1Bk1 on Bk1Bk2 and the main branch road of output; Length and the impedance of B (k-1) 2Bk2; When certain frequency is that the signal (making the corresponding guide wavelength of fi is λ i) of fi is during by output 2 inputs; Have mulitpath to arrive output 3, when the length difference between some or all of path was the odd of λ i/2 or λ i/2, frequency was that the signal of fi will produce isolation at output port 2 and 3 of output ports.Such as: 1. signal is when Bk1 → B (k-1) 1 → B (k-1) 2 → Bk2 and path Bk1 → Bk2 arrive Node B k2 through the path respectively; When the odd of Bk1B (k-1) 1+B (k-1) 1B (k-1) 2+B (k-1) 2Bk2-Bk1Bk2=λ i/2 or λ i/2, frequency is that the signal of fi is cancelled out each other at Node B k2 place through behind the above-mentioned path; 2. signal respectively through the path Bk1 → B (k-1) 1 → B (k-2) 1 → ... → B (m+1) 1 → Bm1 → Bm2 → B (m+1) 2 → ... When → B (k-2) 2 → B (k-1) 2 → Bk2 and path Bk1 → Bk2 arrives Node B k2; As Bk1B (k-1) 1+B (k-1) 1B (k-2) 1+ ... + B (m+1) 1Bm1+Bm1Bm2+Bm2B (m+1) 2+ ... During the odd of+B (k-2) 2B (k-1) 2+B (k-1) 2Bk2-Bk1Bk2=λ i/2 or λ i/2 (wherein; M is the positive integer less than k-1), frequency is that the signal of fi is cancelled out each other at Node B k2 place through behind the above-mentioned path; 3. signal respectively through the path Bk1 → B (k-1) 1 → B (k-2) 1 → ... → B21 → B11 → A → B12 → B22 → ... When → B (k-1) 2 → Bk2 and path Bk1 → Bk2 arrives Node B k2; As Bk1B (k-1) 1+B (k-1) 1B (k-2) 1+ ... + B21B11+B11A+AB12+B12B22+ ... During the odd of+B (k-2) 2B (k-1) 2+B (k-1) 2Bk2-Bk1Bk2=λ i/2 or λ i/2 (wherein; M is the positive integer less than k-1), frequency is that the signal of fi is cancelled out each other at Node B k2 place through behind the above-mentioned path; Be that frequency is that the signal of fi has produced isolation at output port 2 and 3 of output ports.Adjust the position of each branch line [Bk1Bk2] on the main branch road of output; Impedance [Gk] size and main highway section of corresponding output [B (k-1) 1Bk1 of each branch line [Bk1Bk2]; B (k-1) 2Bk2] impedance [Hk1; Hk2] big I isolates a plurality of Frequency points, and realizes the matched well of these power splitter input and output simultaneously between two delivery outlets.
Concrete mentality of designing: (1) the corresponding with it one-to-two joint (Fig. 4, shown in Figure 5) of a bandwidth of operation with reference to the bandwidth of operation of the power splitter that will design, and for the output return loss S22 of this joint, S33 and output isolation S32 do not do requirement; (2) spacing of two of the one-to-two joint main branch roads of output is set to λ
0/ 4 (λ
0Be the corresponding guide wavelength of power splitter centre frequency f0); And on these two the main branch roads of output, branch line is set; The bar of branch line is counted n and is decided according to the bandwidth of operation that is designed; It is many more that branch line is provided with, the then wide more or not broadening of bandwidth of corresponding bandwidth, but the isolation characteristic is better between its input and output coupling and delivery outlet.Each branch line is as shown in Figure 6, is designated as B11B12 respectively, B21B22, and B31B32 ... B (k-1) 1B (k-1) 2, Bk1Bk2 ... B (n-1) 1B (n-1) 2, Bn1Bn2, it is λ that each branch line length initial value is set
0/ 4; (3) in bandwidth of operation, get n Frequency point (it comprises the Frequency point that the passband edge is corresponding), be labeled as f1 respectively, f2, f3 ..., fk ..., fn, the guide wavelength that each Frequency point is corresponding is λ
1, λ
2, λ
3..., λ
k..., λ
nAB11 is set equals λ
1* 3/8 perhaps equals λ
1* 3/8 add λ
1Integral multiple, get B (k-1) 2Bk2=B (k-1) 1Bk1, and its value is set to λ
k/ 4 is λ perhaps
k/ 4 odd.Less for the power splitter size that designs, choose AB11=λ
1* 3/8, B (k-1) 2Bk2=B (k-1) 1Bk1=λ
k/ 4; (4) choose the emulation initial value that empirical method is provided with the branch line impedance [Gk] of this power splitter and exports each section impedance on the main branch road [Hk1, Hk2] according to the impedance of branch line in the branch line electric bridge; (5) set up the simulation model of said power splitter by above method; Adjust the position of each branch line on the main branch road of output; The impedance magnitude of each branch line and the impedance magnitude of exporting each section on the main branch road, thus realize that said power splitter is exported isolation preferably and good input and output are mated.In the final mask, AB11+AB12-B11B12=(λ j/2) * (2p+1)+(λ j/2) * ζ, wherein, λ j is the corresponding guide wavelength of certain Frequency point fj in the bandwidth of operation, p is the natural number less than 30 ,-1＜ζ＜1; Bk1B (k-1) 1+B (k-1) 1B (k-1) 2+B (k-1) 2Bk2-Bk1Bk2=(λ i/2) * (2m+1)+(λ i/2) * δ, wherein, λ i is the corresponding guide wavelength of certain Frequency point fi in the bandwidth of operation, m is the natural number less than 30 ,-1＜δ＜1.
Power splitter provided by the invention, because the design of the unique texture of its transmission line, promptly structure is provided with an input, two outputs are designed with the branch line that is communicated with two defeated main branch roads between the main branch road of two outputs, and do not use isolation resistance between the main branch road of two outputs.Special structural design of the present invention; Make power splitter of the present invention in bandwidth of operation; Its input and output have obtained good coupling; Between two outputs good isolation is arranged, the isolation performance between input and output standing wave performance and two outputs has all obtained good raising, reaches and has improved power splitter design of Simulation accuracy and production efficiency.The present invention compares with the Wilkinson power splitter, has saved the high isolation resistance of the big price of volume, has eliminated the parasitic effects that isolation resistance causes, and has reduced power splitter volume and cost.The present invention compares with branch line electric bridge power splitter of the prior art; Lacked an isolation end on the structure, because the symmetry of structure, the phase equalization between its two output is good; Each port overcome between branch line electric bridge power splitter two outputs owing to can not be realized good standing wave performance; In order to realize that isolation end has good matching, match circuit or corresponding with it absorbing material need be set, the insertion loss of the branch line electric bridge that increases thus at the isolation end place; With 90 degree phase differences, in order to realize that exporting same-phase must add a problem such as corresponding phase shifter at straight-through end because its straight-through end and coupled end output signal are had an appointment.
The present invention has improved design of Simulation accuracy and production efficiency owing to avoided the use isolation resistance, and therefore the ability effective application is in MMIC, in the design of HMIC etc.The power splitter that merits such as the present invention both can be designed for realizing are divided also can be designed for realizing the power splitter that does not wait merit to divide.
Description of drawings
Fig. 1 is the sketch map of two road Wilkinson power splitters of prior art.
Fig. 2 is the sketch map of a kind of power splitter of prior art.
Fig. 3 is the sketch map of a kind of branch line electric bridge power splitter of prior art.
Fig. 4 is a T joint sketch map.
Fig. 5 is a Y joint sketch map.
Fig. 6 is the sketch map of power divider structure of the present invention.
Fig. 7-1 is designed with the five equilibrium power splitter model sketch map of two branch lines for the present invention.
Fig. 7-2 is the S of the power splitter corresponding with Fig. 7-1
11, S
22, S
21, S
32Curve synoptic diagram.
Fig. 8-1 is designed with the five equilibrium power splitter model sketch map of four branch lines for the present invention.
Fig. 8-2 is the S of the power splitter corresponding with Fig. 8-1
11, S
22, S
21, S
32Curve synoptic diagram.
Fig. 9-1 is designed with the five equilibrium power splitter model sketch map of six branch lines for the present invention.
Fig. 9-2 is the S of the power splitter corresponding with Fig. 9-1
11, S
22, S
21, S
32Curve synoptic diagram.
Figure 10-1 is designed with the not five equilibrium power splitter model sketch map of four branch lines for the present invention.
Figure 10-2 is the S of the power splitter corresponding with Figure 10-1
11, S
22, S
33, S
21, S
31, S
32Curve synoptic diagram.
Each shown by reference numeral sign in the above-mentioned accompanying drawing is to liking: 1-input branch road input; The output of 2-one output branch road; The output of another output branch road of 3-; Pass the one-to-two joint of the defeated line of 4-; 5-input branch road rectangular section; 6-input branch road trapezoidal sections; 7-is the highway section that an output branch road is provided with the vertical power splitter axis of output port; 8-is provided with a highway section of the vertical power splitter axis of output port for another output branch road.
Embodiment
Because the basic principle and the branch line electrical bridge principle of the present invention's utilization are similar, so strip line, waveguide, coaxial line or the like also can be realized structure of the present invention, and is applied in the design of said power splitter.The one of ordinary skilled in the art knows, below Y joint in all specific embodiments all can change the T joint into, all available multistage quarter wavelength impedance transducer of the transition line that is adopted replaces.Can carry out various changes to each example structure in form with on the details, but its essence all is the same, all should belong to protection scope of the present invention.
Below in conjunction with accompanying drawing embodiments of the invention are described.
Fig. 7-1, Fig. 8-1, Fig. 9-1 and Figure 10-1 is respectively the sketch map of four embodiment of the present invention.The transmission line that is adopted is a microstrip line, the path of dotted line expression signal transmission, and by the intersection point signal of dotted line, each intersection point is with the letter representation among the figure respectively for the interface of each section transmission line.
Power divider structure among the figure comprises: the one-to-two joint is (among the figure; The part of intersection point A indication), export main branch road one A → B11 → B21 → ... → 7, export main branch road two A → B12 → B22 → ... → 8; Export main branch road one and export the branch line (B11B12, B21B22 or the like) of two of main branch roads.Wherein, first transmission line section 5, its with close road port and be connected, can be referred to as to close the road incoming line, its characteristic impedance is Z
0(being taken as 50 ohm); Second transmission line section 7,8, it is connected with two branch road ports respectively, can be referred to as output line along separate routes, and its characteristic impedance is Z
0(being taken as 50 ohm); Transition line 6 is as impedance transformer, the one of which end with close road incoming line 11 and be connected, the other end is connected with the input of one-to-two joint.
Its structure is the five equilibrium power splitter shown in accompanying drawing 7-1, between the main branch road of two outputs, be designed with two branch lines.Fig. 7-1 is its illustraton of model, the transmission path of dotted line expression signal in this power splitter among the figure.Fig. 7-the 2nd, the S of this power splitter model
11, S
22, S
21, S
32Curve chart.Can be known by curve chart: the centre frequency of this power splitter is 35GHz, its S
32The bandwidth that＜-25dB is corresponding is 2GHz, its S in this bandwidth of operation
11＜-27dB, S
22＜-19dB.
Its structure is the five equilibrium power splitter shown in accompanying drawing 8-1, between the main branch road of two outputs, be designed with four branch lines.Fig. 8-1 is its illustraton of model, the transmission path of dotted line expression signal in this power splitter among the figure.Fig. 8-the 2nd, the S of this power splitter model
11, S
22, S
21, S
32Curve chart.Can be known by curve chart: the centre frequency of this power splitter is 34.7GHz, its S
32The bandwidth that＜-25dB is corresponding is 4.6GHz, its S in this bandwidth of operation
11＜-18.3dB, S
22＜-21.6dB.
Embodiment 3
Its structure is the five equilibrium power splitter shown in accompanying drawing 9-1, between the main branch road of two outputs, be designed with 6 branch lines.Fig. 9-1 is its illustraton of model, the transmission path of dotted line expression signal in this power splitter among the figure.Fig. 9-the 2nd, the S of this power splitter model
11, S
22, S
21, S
32Curve chart.Can be known by curve chart: the centre frequency of this power splitter is 41GHz, its S
32The bandwidth that＜-20dB is corresponding is 8GHz, its S in this bandwidth of operation
11＜-18.8dB, S
22＜-17dB.
Embodiment 4
Its structure is five equilibrium power splitter not shown in accompanying drawing 10-1, between the main branch road of two outputs, be designed with 4 branch lines.Figure 10-1 is its illustraton of model, the transmission path of dotted line expression signal in this power splitter among the figure.Figure 10-the 2nd, the S of this power splitter model
11, S
22, S
21, S
32Curve chart.Can be known by curve chart: the centre frequency of this power splitter is 35GHz, its S
32The bandwidth that＜-25dB is corresponding is 4GHz, its S in this bandwidth of operation
11＜-19dB, S
22＜-20.5dB, S
33＜-18.5dB, S
21Be about-2.5dB S
31Be about-4.5dB.
Claims (10)
1. power splitter; Its transmission line comprises the one-to-two joint; The road port that closes of joint connects the input branch road; Two fens road ports of joint connect the main branch road of two outputs respectively; It is characterized in that two outputs are designed with the branch line of the main branch road of connection two outputs that is no less than 2 between the main branch road, branch line is by 11 adding from node A to Node B 12 path and be (λ j/2) * (2p+1)+(λ j/2) * ζ design with path difference from Node B 11 to Node B 12 from node A to Node B, and the branch line of other nodes is by (k-1) 1 adds node B (k-1) 1 and be (λ i/2) * (2m+1)+(λ i/2) * δ design to the difference that Node B (k-1) 2 adds the path of node B (k-1) 2 to Node B k2 and path from Node B k1 to Node B k2 again from Node B k1 to Node B; Wherein, λ j is the corresponding guide wavelength of Frequency point fj in the bandwidth of operation, and p is the natural number less than 30 ,-1＜ζ＜1; λ i is the corresponding guide wavelength of Frequency point fi in the bandwidth of operation, and m is the natural number less than 30, and k is more than or equal to 1 and smaller or equal to the bar number of branch line ,-1＜δ＜1.
2. power splitter according to claim 1 is characterized in that from node A to Node B 11 path equals from node A to Node B 12 path.
3. power splitter according to claim 1 is characterized in that two export the branch line of the main branch road of connection two outputs that is designed with 2～10 between the main branch road.
4. power splitter according to claim 1 is characterized in that the main branch road of two outputs is a symmetric design.
5. power splitter according to claim 1 is characterized in that the branch line length of two outputs between main branch road is less than the corresponding guide wavelength of power splitter centre frequency.
6. power splitter according to claim 1 is characterized in that transmission line is a microstrip transmission line.
7. power splitter according to claim 1 is characterized in that transmission line is a waveguide transmission line.
8. power splitter according to claim 1 is characterized in that transmission line is a strip line.
9. according to the described power splitter of one of claim 1 to 7, it is characterized in that transmission line is made up of rectangular section, trapezoidal sections and rectangular section from the straight parallel end of the main branch road of input to two output, the branch line design with rectangular section that output is connected in.
10. according to the described power splitter of one of claim 1 to 7, it is characterized in that transmission line is made up of rectangular section, ladder trapezoidal sections and rectangular section from the straight parallel end of the main branch road of input to two output, the branch line design with rectangular section that output is connected in.
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| CN 200910164400 CN101656343B (en) | 2009-09-11 | 2009-09-11 | Power divider with new structure |
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| CN 200910164400 CN101656343B (en) | 2009-09-11 | 2009-09-11 | Power divider with new structure |
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| CN101656343B true CN101656343B (en) | 2012-12-12 |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102237563A (en) * | 2010-04-29 | 2011-11-09 | 武汉滨湖电子有限责任公司 | 1-into-36 port non-equiamplitude distribution network |
| CN102420351B (en) * | 2012-01-04 | 2014-06-11 | 镇江中安通信科技有限公司 | Power dividing phase shifter |
| CN103367851B (en) * | 2012-03-28 | 2017-09-26 | 启碁科技股份有限公司 | Splitter |
| CN103516330B (en) * | 2012-06-15 | 2016-08-24 | 华为终端有限公司 | Four band Wilkinson power distributor method for parameter configuration and parameter configuration device |
| CN103633406A (en) * | 2013-12-02 | 2014-03-12 | 天津光电通信技术有限公司 | Microstrip line power distributor of decimetric wave with equal distribution ratio |
| CN103702510B (en) * | 2013-12-31 | 2016-11-23 | 华为技术有限公司 | Circuits System |
| CN104183896B (en) * | 2014-08-11 | 2016-11-09 | 电子科技大学 | It is applicable to four port devices test structures of Terahertz frequency range |
| CN104319448B (en) * | 2014-10-24 | 2018-01-16 | 中国电子科技集团公司第四十一研究所 | A kind of multilayer power distribution network of high frequency printed board based on attached resistive film |
| CN105870565A (en) * | 2016-04-29 | 2016-08-17 | 福州同创微波通讯技术有限公司 | 180-degree strip line cavity bridge for high-power broadband |
| CN106972232A (en) * | 2017-03-28 | 2017-07-21 | 石家庄创天电子科技有限公司 | Power divider |
| CN107293834A (en) * | 2017-06-30 | 2017-10-24 | 成都玖信科技有限公司 | A kind of ultra wide band electrically resistive power divider |
| CN110995167B (en) * | 2019-11-19 | 2022-08-16 | 中国电子科技集团公司第五十五研究所 | Internal matching power tube applying optimized synthesis network |
| CN111326841A (en) * | 2020-02-14 | 2020-06-23 | 电子科技大学 | High-isolation one-to-four phase-shifting power divider |
| CN113300071B (en) * | 2021-06-07 | 2022-04-12 | 深圳市鼎阳科技股份有限公司 | Directional coupler and network analyzer |
| CN115117584B (en) * | 2022-06-15 | 2023-09-19 | 电子科技大学长三角研究院(湖州) | Broadband four-way power divider with low amplitude flatness |
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