CN104505569A - Plane multi-port power divider - Google Patents
Plane multi-port power divider Download PDFInfo
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- CN104505569A CN104505569A CN201410649897.0A CN201410649897A CN104505569A CN 104505569 A CN104505569 A CN 104505569A CN 201410649897 A CN201410649897 A CN 201410649897A CN 104505569 A CN104505569 A CN 104505569A
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- power splitter
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Abstract
The invention discloses a plane multi-port power divider which comprises a plurality of radio frequency transmission lines consisting of metal strip lines and metal plates. Each metal strip line comprises a main input port and N output ports, wherein an annular strip line used for impedance matching is arranged between the main input port and the N output ports; the main input port is connected with the annular strip line by M parallel branch strip lines; the annular strip line is connected with the N output ports by N output branch strip lines; resistors are arranged between at least two of the output branch strip lines; and each resistor is connected with the two output branch strip lines by resistor connecting strip lines; M is greater than or equal to 3 and N is greater than or equal to 1. The power divider has the characteristics of small size and high isolation; the insertion loss of the power divider can be reduced by size reduction; the isolation between array unit channels can be improved by improving the isolation of the output ports of the power divider, so that the influence of mutual coupling between antenna array units is reduced, and the radiation performance is improved; and in addition, the power divider is in a pure plane structure, is easy to process and excellent in engineering practical value.
Description
Technical field
The present invention relates to radio frequency passive device, be specifically related to a kind of plane multiport power splitter.
Background technology
Power splitter, as the term suggests be exactly to multiple output port by the power division of input port.Power splitter can be used as feeding network and is widely used in field of array antennas.Existing power splitter comprises the forms such as T-shaped minor matters or Wilkinson.Power splitter simplicity of design, the size of T-shaped minor matters mode are little, but its interport isolation is poor; Wilkinson power splitter by between two output channels connect a resistance, solve the problem of interport isolation difference, but its often layout flexibility not as good as T-shaped minor matters scheme.
Be the array antenna of Y for an element number of array, its merit divides feeding network to mainly contain two kinds of implementations, the first scheme adopts multiple 1 point of X power splitter cascade (X < Y), such as 4 cellular array antennas, its feeding network can adopt three 1 point 2 power splitters to realize, namely 1 point of 2 power splitter connect 1 point of 2 power splitter again at each output port, and then realize the object of 1 point 4.First scheme is non-concatenated schemes, namely directly adopts 1 point of Y power splitter to realize.For the aerial array that array number is many, if adopt concatenated schemes, then the size of feeding network is often larger, therefore a lot of occasion adopts non-cascaded scheme to realize.
Mainly there are two large classes in existing non-cascaded multiport power splitter: directly from input port, by N number of minor matters parallel connection, external N number of coupling minor matters realize output port is again 50ohm for the former.Its isolation is increased by contact resistance between the adjacent minor matters of N number of parallel connection.See document [1]: (Yung-Jinn Chen, and Ruey-Beei Wu, A wide-band multiport planar power-divider design using matched sectorial components in radial arrangement, IEEE Tran.Microw Theory Tech, 46, (1998), 1072-1078.).This scheme is (General N >=3) when port number is more, and the difficulty all increasing resistance between two minor matters becomes very large.Meanwhile, along with the increase of N, the characteristic impedance of N number of minor matters in parallel can along with increase, and cause microstrip line more and more thinner, the impact of mismachining tolerance on index is increasing.Therefore certain restriction is caused to the output port number N of this scheme.
The latter is at document [2] (Sushim Mukul Roy, Isaac Balbin, and Nemai Chandra Karmakar, Novel N-way Power Divider and Array Configuration for RFID, 2008IEEE Int RFID, 2008, the scheme proposed 89-96.), namely energy passes through a big disk after input port feed-in, this big disk presents low resistive state, outside disk, directly add N number of minor matters afterwards realize the output of N road, this type of power splitter is except isolation bad (not adding isolation resistance), because disk size determines its characteristic impedance and equivalent electric length, therefore want to obtain desirable matching effect, number due to N is selected often to be subject to certain restrictions, therefore the size of overall increase power splitter or the equivalent input impedance of conversion output port is needed, design difficulty strengthens.
Summary of the invention
The object of the invention is to for above-mentioned defect of the prior art, provide a kind of output port number to adjust flexibly, easy to process, and significantly can promote the matching effect of existing non-cascaded structure and the plane multiport power splitter of interport isolation.
To achieve these goals, the technical solution used in the present invention is: comprise some the radio-frequency transmission lines be made up of metal tape line and metallic plate, and wherein metal tape line comprises a total input port and N number of output port, N >=3; The endless belt line for impedance matching is provided with between described total input port and N number of output port, total input port is connected with endless belt line by M bar minor matters band in parallel line, M >=1, endless belt line exports minor matters band line by N bar and connects N number of output port respectively; In described output minor matters band line, have at least between two strip line and be provided with resistance, resistance is exported minor matters band line by resistance connecting band line be connected with two.
Plane multiport power splitter is realized by microstrip line construction, and microstrip line construction comprises medium substrate, metal tape line and metal floor, and described metal tape line and metal floor lay respectively at the both sides up and down of medium substrate; Described metal tape line comprises the microstrip line connecting N number of output port, and annulus microstrip line and M bar connect the microstrip line of total input port.
Plane multiport power splitter is realized by suspension strip line structure, and suspension strip line structure comprises metal tape line, upper and lower metal floor and the medium be filled between metal floor, and described metal tape line is between upper and lower metal floor; Described metal tape line comprises the suspension band line connecting N number of output port, and annulus suspension band line and M bar connect the suspension band line of total input port.
Described total input port is arranged on the center of circle of endless belt line, and M bar minor matters band in parallel line is evenly distributed on the inside radius circle of endless belt line, and N bar exports minor matters band line and is evenly distributed on the outer radius circle of endless belt line.
The length of described M bar minor matters band in parallel line is 0.05 ~ 0.45 times of guide wavelength.
Described N bar exports between adjacent two of minor matters band line and is all connected with resistance by resistance connecting band line.
Described total input port and the impedance of N number of output port are 50ohm.
The number M of described minor matters band line in parallel is less than the number N exporting minor matters band line.
Compared with prior art, the flexibility of output port number N of the present invention is large, plane multiport can be realized miniaturized, energy is by total input port feed-in, M bar minor matters band in parallel line is extended by total input port, its length and width are determined with impedance matching theory, M bar minor matters band in parallel line is exported between minor matters band line with N bar and is connected by endless belt line, endless belt line not only has connection M bar minor matters band line in parallel and N bar to export the effect of minor matters band line, there is the effect of impedance matching equally, resistance is added by exporting at N bar between minor matters band line, resistance is exported minor matters band line by resistance connecting band line be connected with two, resistance serves as the effect of isolation resistance.The power splitter superiority that the present invention is greater than 10 for N is stronger, compared with realizing the method for multiport power division with traditional cascade power splitter, the volume of power splitter can be effectively reduced, resistance is added additionally by exporting at N bar between minor matters band line, isolation between port can be promoted, if this power splitter is applied among aerial array, the mutual coupling between bay can be reduced, improve the radiance of antenna, being simultaneously the power splitter of N for output port, power splitter bandwidth of operation can being adjusted by selecting suitable minor matters number M in parallel.Compared with the non-cascaded multiport power splitter of traditional type, the present invention has the little feature of size, by reducing size, can reduce the Insertion Loss of power splitter, the present invention simultaneously has the feature of high-isolation, by promoting the isolation of array element passage, can reduce the mutual coupling between bay, improve the radiance of antenna, the present invention is realized by pure-surface structure in addition, be easy to processing realize, have fabulous engineering practical value.
Further, the total input port of the present invention is arranged on the center of circle of endless belt line, M bar minor matters band in parallel line is evenly distributed on the inside radius circle of endless belt line, and N bar exports minor matters band line and is evenly distributed on the outer radius circle of endless belt line, and power division is uniform high-efficiency more.
Further, because the strip length connecting total input port is relevant to the operating frequency of multiport power splitter, therefore the length of M bar of the present invention minor matters band in parallel line is generally the guide wavelength of 0.05 ~ 0.45 times, the power splitter power division best results of the minor matters band line composition in parallel of length within the scope of this.
Further, N bar of the present invention exports between adjacent two of minor matters band line and is all connected with resistance by resistance connecting band line, improves the isolation between single unit system port.
Further, the number M of the present invention's minor matters band in parallel line is less than the number N exporting minor matters band line, reduces the impact of mismachining tolerance for power splitter performance, improves the flexibility of power splitter design.
Accompanying drawing explanation
Fig. 1 overall structure schematic diagram of the present invention;
The structural representation of Fig. 2 the present invention one point of six power splitter;
The structural representation of Fig. 3 the present invention one point of 12 power splitter;
The structural representation of Fig. 4 one-to-two 14 of the present invention power splitter;
In accompanying drawing: the total input port of 1-; 2-minor matters band in parallel line; 3-endless belt line; 4-exports minor matters band line; 5-resistance connecting band line; 6-resistance; 7-output port; 8-housing; 9-SMA joint; 10-Wilkinson power splitter.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See Fig. 1, the present invention includes some the radio-frequency transmission lines be made up of metal tape line and metallic plate, wherein metal tape line comprises a total input port 1 and N number of output port 7, N >=3; The endless belt line 3 for carrying out impedance matching is provided with between total input port 1 and N number of output port 7, total input port 1 is connected with endless belt line 3 by M bar minor matters band in parallel line 2, M >=1, endless belt line 3 exports minor matters band line 4 by N bar and connects N number of output port 7 respectively; Export in minor matters bands line 4, have at least between two strip line and be provided with resistance 6, resistance 6 is exported minor matters band line 4 by resistance connecting band line 5 be with line to be connected with two.
Plane multiport power splitter of the present invention can be realized by microstrip line construction or suspension strip line structure: microstrip line construction comprises medium substrate, metal tape line and metal floor, and metal tape line and metal floor lay respectively at the both sides up and down of medium substrate; Metal tape line comprises the microstrip line connecting N number of output port 7, and annulus microstrip line and M bar connect the microstrip line of total input port 1.Suspension strip line structure comprises metal tape line, upper and lower metal floor and the medium be filled between metal floor, and medium can be air, and metal tape line is between upper and lower metal floor; Metal tape line comprises the suspension band line connecting N number of output port 7, and annulus suspension band line and M bar connect the suspension band line of total input port 1.
See Fig. 2, one point of six power splitter energy that constant power of the present invention distributes is by the feed-in of total input port 1, extend three minor matters band lines 2 in parallel afterwards, its length and width are determined with impedance matching theory, article three, minor matters band line 2 in parallel is exported between minor matters band line 4 be connected by endless belt line 3 with six, endless belt line 3 not only has connection six minor matters band line 2 in parallel and three to export the effect of minor matters band line 4, there is the effect of impedance matching equally, export between minor matters band line 4 at six afterwards and add resistance 6, connected by resistance connecting band line 5 between resistance 6, resistance 6 serves as the effect of isolation resistance, isolation between port can be promoted.
See Fig. 3, one point of 12 power splitter that unequal power of the present invention distributes, the number of output port 7 is 12, and connecting total input port 1 with minor matters band line 2 number in parallel of endless belt line 3 is six.
See Fig. 4, one-to-two 14 power splitter of the present invention is the rear realization of Wilkinson power splitter 10 adding a point four on the basis of one point of six power splitter, that is the present invention equally can be used in combination with other type power splitter, to reach the performance requirement of power division.By connecting the Wilkinson power splitter 10 of a point four after every six export minor matters band line 4, realize 24 output ports 7, in order to the convenience of structure installment, housing 8 elects hexagon as, and each output port 7 connects sub-miniature A connector 9.
The present invention has the little feature of size, by reducing size, the Insertion Loss of power splitter can be reduced, the present invention simultaneously has the feature of high-isolation, by promoting the isolation of array element passage, can reduce the mutual coupling between bay, improve the radiance of antenna, in addition the present invention is realized by pure-surface structure, is easy to processing and realizes, have fabulous engineering practical value.
Claims (8)
1. a plane multiport power splitter, is characterized in that: comprise some the radio-frequency transmission lines be made up of metal tape line and metallic plate, and wherein metal tape line comprises a total input port (1) and N number of output port (7), N >=3; The endless belt line (3) for impedance matching is provided with between described total input port (1) and N number of output port (7), total input port (1) is connected with endless belt line (3) by M bar minor matters band line (2) in parallel, M >=1, endless belt line (3) exports minor matters band line (4) by N bar and connects N number of output port (7) respectively; In described output minor matters band line (4), have at least between two strip line and be provided with resistance (6), resistance (6) is exported minor matters band line (4) by resistance connecting band line (5) be connected with two.
2. plane multiport power splitter according to claim 1, it is characterized in that: plane multiport power splitter is realized by microstrip line construction, microstrip line construction comprises medium substrate, metal tape line and metal floor, described metal tape line and metal floor lay respectively at the both sides up and down of medium substrate; Described metal tape line comprises the microstrip line connecting N number of output port (7), and annulus microstrip line and M bar connect the microstrip line of total input port (1).
3. plane multiport power splitter according to claim 1, it is characterized in that: plane multiport power splitter is realized by suspension strip line structure, suspension strip line structure comprises metal tape line, upper and lower metal floor and the medium be filled between metal floor, described metal tape line is between upper and lower metal floor; Described metal tape line comprises the suspension band line connecting N number of output port (7), and annulus suspension band line and M bar connect the suspension band line of total input port (1).
4. plane multiport power splitter according to claim 1, it is characterized in that: described total input port (1) is arranged on the center of circle of endless belt line (3), M bar minor matters band line (2) in parallel are evenly distributed on the inside radius circle of endless belt line (3), and N bar exports minor matters band line (4) and is evenly distributed on the outer radius circle of endless belt line (3).
5. plane multiport power splitter according to claim 1, is characterized in that: the length of described M bar minor matters band line (2) in parallel is 0.05 ~ 0.45 times of guide wavelength.
6. plane multiport power splitter according to claim 1, is characterized in that: described N bar exports between adjacent two of minor matters band line (4) and is all connected with resistance (6) by resistance connecting band line (5).
7. plane multiport power splitter according to claim 1, is characterized in that: described total input port (1) is 50ohm with the impedance of N number of output port (7).
8. plane multiport power splitter according to claim 1, is characterized in that: the number M of described minor matters band line (2) in parallel is less than the number N exporting minor matters band line (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410649897.0A CN104505569A (en) | 2014-11-14 | 2014-11-14 | Plane multi-port power divider |
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| CN201410649897.0A CN104505569A (en) | 2014-11-14 | 2014-11-14 | Plane multi-port power divider |
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| CN201410649897.0A Pending CN104505569A (en) | 2014-11-14 | 2014-11-14 | Plane multi-port power divider |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655679A (en) * | 2016-01-12 | 2016-06-08 | 电子科技大学 | Quasi-planar high-isolation multi-path power divider |
| CN106207361A (en) * | 2016-08-01 | 2016-12-07 | 广东工业大学 | A kind of double dimension restructural orthocoupler |
| CN106340705A (en) * | 2016-09-20 | 2017-01-18 | 西安电子工程研究所 | Novel S band one-to-two power divider |
| CN106602199A (en) * | 2016-11-30 | 2017-04-26 | 航天恒星科技有限公司 | Microwave integrated circuit and planar coupler thereof |
| CN107464979A (en) * | 2017-09-06 | 2017-12-12 | 南京觅力觅特电子科技有限公司 | A kind of ring-like power splitter of multi-functional mixing based on microstrip line |
| CN107797180A (en) * | 2017-11-28 | 2018-03-13 | 中国计量大学 | The THz wave multi-path power divider of circular configuration |
| CN110492213A (en) * | 2019-07-22 | 2019-11-22 | 电子科技大学 | A kind of millimeter wave microstrip power distribution or synthesizer |
-
2014
- 2014-11-14 CN CN201410649897.0A patent/CN104505569A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| FANGFANG FAN等: ""A Novell: 19 Microstrip Radial Power Divider Design for the Application in Antenna Array"", 《2013 INTERNATIONAL WORKSHOP ON MICROWAVE AND MILLIMETER WAVE CIRCUITS AND SYSTEM TECHNOLOGY》 * |
| YUNG-JINN CHEN: ""A Wide-Band Multiport Planar Power-Divider Design Using Matched Sectorial Components in Radial Arrangement"", 《IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655679A (en) * | 2016-01-12 | 2016-06-08 | 电子科技大学 | Quasi-planar high-isolation multi-path power divider |
| CN105655679B (en) * | 2016-01-12 | 2019-04-09 | 电子科技大学 | A kind of directrix plane high isolation multi-path power divider |
| CN106207361A (en) * | 2016-08-01 | 2016-12-07 | 广东工业大学 | A kind of double dimension restructural orthocoupler |
| CN106207361B (en) * | 2016-08-01 | 2018-12-18 | 广东工业大学 | A kind of restructural orthocoupler of double dimensions |
| CN106340705A (en) * | 2016-09-20 | 2017-01-18 | 西安电子工程研究所 | Novel S band one-to-two power divider |
| CN106602199A (en) * | 2016-11-30 | 2017-04-26 | 航天恒星科技有限公司 | Microwave integrated circuit and planar coupler thereof |
| CN106602199B (en) * | 2016-11-30 | 2019-05-31 | 航天恒星科技有限公司 | Microwave integrated circuit and its Planar coupler |
| CN107464979A (en) * | 2017-09-06 | 2017-12-12 | 南京觅力觅特电子科技有限公司 | A kind of ring-like power splitter of multi-functional mixing based on microstrip line |
| CN107464979B (en) * | 2017-09-06 | 2019-11-01 | 南京觅力觅特电子科技有限公司 | A kind of ring-like power splitter of multi-functional mixing based on microstrip line |
| CN107797180A (en) * | 2017-11-28 | 2018-03-13 | 中国计量大学 | The THz wave multi-path power divider of circular configuration |
| CN110492213A (en) * | 2019-07-22 | 2019-11-22 | 电子科技大学 | A kind of millimeter wave microstrip power distribution or synthesizer |
| CN110492213B (en) * | 2019-07-22 | 2021-03-30 | 电子科技大学 | Millimeter wave microstrip power distribution or synthesis device |
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Application publication date: 20150408 |