CN102301619A - Power Distributing Combiner And Circuit Board Having Power Distributing Combiner - Google Patents
Power Distributing Combiner And Circuit Board Having Power Distributing Combiner Download PDFInfo
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- CN102301619A CN102301619A CN2009801546833A CN200980154683A CN102301619A CN 102301619 A CN102301619 A CN 102301619A CN 2009801546833 A CN2009801546833 A CN 2009801546833A CN 200980154683 A CN200980154683 A CN 200980154683A CN 102301619 A CN102301619 A CN 102301619A
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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
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Abstract
A power distributing combiner and circuit board having the power distributing combiner are provided. The power distributing combiner comprises a combining end and at least three dividing end groups; one dividing end group comprises one or two dividing ends; the at least three dividing end groups are located in the same plane; the dividing ends all connect with a connecting device which is vertical to the plane; the parameters of the elements which connect the dividing ends to the connecting device are same and the angles between each of two neighbor dividing end groups are same; the combining end connects with the connecting device.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of work(combiner device and the circuit board with work(combiner device.Background technology
In mobile communication system, the application of work(combiner device is very extensive.In some cases, it is desirable to which the signal at the branch end of work(combiner device is constant amplitude same-phase, that is to say, that, it is desirable to the Space Coupling signal that the microstrip line at each branch end receives the microstrip line at other branch ends is identical.
As shown in Figure 1, for the circuit diagram of one point of three Wilkinson work(combiner device in the prior art, wherein B0 is the crosspoint of four sections of microstrip lines, on PCB, microstrip line B1B0, B2B0 and B3B0 are the impedance transformation line of 1/4 wavelength of frequency centered on length, impedance is 86.6 ohm, and the impedance of microstrip line 21,22 and 23 is usually 50 ohm.The microstrip line 22 at the second branch end receives the Space Coupling signal of the microstrip line 23 at the branch end of microstrip line 21 and the 3rd at the first branch end；Due to the 3rd branch end the first branch of distance end farther out, the microstrip line 21 at the first branch end receives the Space Coupling weak output signal of the microstrip line 23 at the 3rd branch end, can ignore, thus the first branch end microstrip line 21 substantially only receive the second branch end microstrip line 22 Space Coupling signal；Similarly, the microstrip line 23 at the 3rd branch end substantially only receives the Space Coupling signal of the microstrip line 22 at the second branch end.According to signal phasor principle of stacking, the signal that the microstrip line 21 at the first branch end is received is identical with the 3rd branch end, signal and the first branch end, the difference at the 3rd branch end that the microstrip line 22 at the second branch end is received, the signal amplitude at branch end is different, it can also influence the phase at each branch end simultaneously, so, one point of three Wilkinson work(combiner device is difficult to constant amplitude same-phase on PCB.
As shown in Figure 2, for a kind of circuit diagram of one point of four Wilkinson work(combiner device in the prior art, the work(combiner device is cascaded by one-to-two Wilkinson work(combiner device and formed, wherein the first branch end is in same marginal position with the 4th branch end, second branch end and the 3rd branch end are in an intermediate position
The Space Coupling signal that the branch termination in centre position is received is more than the branch end of marginal position, and therefore, one point of four Wilkinson work(combiner device is difficult to constant amplitude same-phase on PCB.
As shown in Figure 3, for the circuit diagram of another one point of four Wilkinson work(combiner device in the prior art, this work(combiner device does not have too many microstrip line, one block of larger copper foil of area 40 is the substitute is, the copper foil 40 is connected between combining end and the first branch end, the second branch end, the 3rd branch end, the 4th branch end.Same reason, the branch end in centre position（Second branch end and the 3rd branch end）The Space Coupling signal received is more than the branch end of marginal position（First branch end and the 4th branch end）, so being difficult to constant amplitude same-phase.
In summary, using the one point of three Wilkinson work(combiner device or one point of four Wilkinson work(combiner device of such as above-mentioned structure, the influence of branch end to each other is inconsistent, causes the signal at branch end to be difficult to constant amplitude same-phase.The content of the invention
The embodiments of the invention provide a kind of work(combiner device and the circuit board with work(combiner device, when need will signal is divided into more than or equal to 3 road signal all the way when, ensure that the influence of branch end to each other is consistent, so that the signal at all branch ends can realize constant amplitude same-phase.
The embodiments of the invention provide a kind of work(combiner device, including combining end and at least three branch end groups, it is characterised in that a branch end group includes one or two branch end；The branch end of at least three branches end group is generally aligned in the same plane, the branch end is connected with the attachment means perpendicular to the plane, wherein, connect that the branch end is identical to the parameter of the element of the attachment means, the angle of each two adjacent shunt end group is equal；The combining end is connected with the attachment means.
The embodiments of the invention provide a kind of circuit board with work(combiner device, the work(combiner device includes combining end and at least three branch end groups, wherein, a branch end group includes one or two branch end；The branch end of at least three branches end group is generally aligned in the same plane, the branch end is connected with the attachment means perpendicular to the plane, wherein, connect that the branch end is identical to the parameter of the element of the attachment means, the angle of each two adjacent shunt end group is equal；The combining end is connected with the attachment means, also, several branch ends are arranged on the same layer of the circuit board.
As can be seen from the previous technical solutions, each branch end group is symmetrical, the Space Coupling equivalent that each branch termination is received, and therefore, the signal at all branch ends realizes constant amplitude same-phase.The accompanying drawing used required in brief description of the drawings embodiment or description of the prior art is briefly described, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of one point of three Wilkinson work(combiner device in the prior art；
Fig. 2 is a kind of circuit diagram of one point of four Wilkinson work(combiner device in the prior art；Fig. 3 is the circuit diagram of another one point of four Wilkinson work(combiner device in the prior art；Fig. 4 is the structural representation of the work(combiner device of the embodiment of the present invention one；
Fig. 5 is the structural representation of the work(combiner device of the embodiment of the present invention two；
Fig. 6 is the structural representation of the work(combiner device of the embodiment of the present invention three；
Fig. 7 is the structural representation of the work(combiner device of the embodiment of the present invention four；
Fig. 8 is the structural representation for the circuit board that the embodiment of the present invention one has work(combiner device；Fig. 9 is the schematic cross-section in A-A faces in Fig. 8；
Figure 10 is the structural representation for the circuit board that the embodiment of the present invention two has work(combiner device.Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
Outer unless specified otherwise, signal as referred to herein refers both to the modulated signal of certain bandwidth.
Work(combiner device provided in an embodiment of the present invention includes combining end and at least three branch end groups, wherein, a branch end group includes one or two branch end；The branch end of at least three branches end group is generally aligned in the same plane, the branch end is connected with the attachment means perpendicular to the plane, wherein, connect that the branch end is identical to the parameter of the element of the attachment means, the angle of each two adjacent shunt end group is equal；The combining end is connected with the attachment means.
It can be seen that, because each branch end is to be uniformly distributed, and the parameter from attachment means to the element at each branch end is identical, according to signal phasor principle of stacking, the Space Coupling signal equivalent that each branch termination is received, therefore, when need will signal is divided into multiple signals all the way when, the signal at all branch ends realizes constant amplitude same-phase.
A kind of work(combiner device of the embodiment of the present invention is described in detail below：
As shown in figure 4, being that branch end group is 3 in the structural representation of the work(combiner device of the embodiment of the present invention one, the present embodiment, a branch end group is a branch end.Specifically, the present embodiment work(combiner device includes combining end 50,3 branch ends and attachment means 54, wherein 3 branch ends are respectively branch end 51,52 and 53.Branch end 51,52 and 53 is generally aligned in the same plane, and branch end 51,52 and 53 is connected with attachment means 54, and attachment means 54 are perpendicular to the plane where 3 branch ends；The angle at each two adjacent shunt end is equal, and the angle at each two adjacent shunt end can be 120 degree in the present embodiment, from fig. 4, it can be seen that branch end 51,52 and 53 is uniformly distributed with attachment means 54 for the Round hearts are radial；Parameter from attachment means 54 to the element at each branch end 51,52,53 is identical；Combining end 50 is connected with attachment means 54.
In the present embodiment, branch end 51 receives the Space Coupling signal at branch end 52 and branch end 53, branch end 52 receives the Space Coupling signal at branch end 51 and branch end 53, and branch end 53 receives the Space Coupling signal at branch end 51 and branch end 52；Due to each branch end（Branch end 51,52 and 53) to be uniformly distributed, and from attachment means 54 to each branch end（Branch end 51,52 is identical with the parameter of element 53), according to signal phasor principle of stacking, the Space Coupling signal equivalent that each branch termination is received, therefore, when need will signal is divided into 3 road signal all the way when, the signal at all branch ends realizes constant amplitude same-phase.
Wherein, combining end 50 can be for microstrip line or with wire, when combining end 50 is micro-strip line or belt wire
When, combining end 50 is separated by least one layer of ground level with branch end 51,52 and 53 place planes, and so, combining end 50 does not have signal and passes through Space Coupling to any branch end.Attachment means 54 can be via.
Above-described embodiment one shows a case that the embodiment of the present invention is exactly a branch end including 3 branch end groups, a branch end groups, the embodiment of the present invention is not limited only to above-mentioned situation, and the structure of foregoing description can be applicable to be more than the work(combiner device of 3 branch end groups.
It should be noted that for the element illustrated in the specific embodiment of the invention, in RF application, copper clad patterns are also element, are distributed elements.The three-dimensional structure of this figure, determines the parameter attribute of this distributed element.Element is a general name, include distributed element (distributed circuit, distributed element) and lamped element (lumped circuit, lumped element) and distributed element refers to the various copper clad patterns on PCB, the three-dimensional structure of copper clad patterns determines its feature.Lamped element is the element with pin and outline packages such as resistance, inductance, electric capacity that component supplier is provided.
As shown in figure 5, being that branch end group has 8 in the structural representation of the work(combiner device of the embodiment of the present invention two, the present embodiment；One of branch end group is a branch end, and 8 branch ends are respectively branch end 61,62,63,64,65,66,67 and 68;8 branch ends are generally aligned in the same plane, and 8 branch ends are connected with a via 69, and the via 69 can be as attachment means, and its direction is perpendicular to 8 branch ends（Branch end 61,62,63,64,65,66,67 and 68) where plane；Each two adjacent shunt end（Branch end 61,62,63,64,65,66,67 and angle 68) are equal, for example：The angle at branch end 61 and 62 is equal to the angle at other any two adjacent shunt ends, as seen from Figure 5, and with this, the Wei Round hearts of via 69 are radial is uniformly distributed at 8 branch ends；It is identical with the parameter of 68 element from via 69 to each branch end 61,62,63,64,65,66,67；Combining end（Not shown in Fig. 5) also it is connected with via 69.Wherein, for Fig. 5 this mode, it can also be expected that combining end can be the cross section of via 69.
The present embodiment can not also use metallization via 69 connection branch end and combining end, for example, the mode such as center conductor using coaxial connector is connected.Wherein, for that can be combining end using the cross section of this mode of coaxial connector, coaxial connector.
In the present embodiment, because each branch end is to be uniformly distributed, and the parameter from via 69 to the element at each branch end is identical, the Space Coupling signal at other branch ends that each branch termination is received also phase
Deng, therefore, when need will signal is divided into more than 3 road signal all the way when, the signal at all branch ends realizes constant amplitude same-phase.
As shown in fig. 6, being that branch end group is 8 in the structural representation of the work(combiner device of the embodiment of the present invention three, the present embodiment, a branch end group is a branch end.
The present embodiment and the difference of embodiment two are, resistance is in series with the microstrip line between 8 branch ends and attachment means 72, and the resistance can be to bury resistance or surface patch resistor in PCB, and is located at the plane where branch end.By taking one of branch end 71 as an example, branch end 71 is connected by the resistance 74 and microstrip line 75 of series connection with attachment means 72, and the resistance 74 can be used for ultra wide band impedance matching, improves the return loss at branch end 71；There is the impedance transformation line of 1/4 too many wavelength in the prior art in Fig. 2 and Fig. 3, in the case where frequency is low, substantial amounts of PCB surface product is taken, but the size of resistance 74 is small, and the impedance transformation line of 1/4 wavelength is much better than in terms of layout area, ultra wide band index；Also, because all branch ends are all connected in attachment means 72 by microstrip line, resistance, so, improve the isolation between each branch end.
Wherein, impedance matching network 73 is provided between attachment means 72 and combining end 70.Looked over from impedance matching network 73 to attachment means 72, because each branch terminal impedance is to be connected in parallel, impedance at attachment means 72 is each branch terminal impedance and 1/8th of series impedance sum, so impedance is very low, the impedance matching network 73 is used to connect combining end 70 and attachment means 72, also acts as the high impedance at matching combining end 70 and the low-impedance effect at attachment means 72.The impedance matching network 73 can be more than one lamped element, the combination of distributed element, can be conventional impedance transformation line, i.e., the microstrip line of 1/4 wavelength of one section centre frequency specifically（Or strip line）, may also be constituted certainly using passive networks such as RLC.In the same plane, but not planes where branch end, and be separated by least one layer of ground level with plane where branch end make combining end 70 not have signal and pass through Space Coupling to any branch end for the impedance matching network 73 and combining end 70.
Because each branch end is connected by microstrip line 75 with attachment means 72, if the quantity at branch end is a lot, the Xing Cheng Round plate-likes copper foil 76 around attachment means 72 of microstrip line 75, the copper foil 76 can also play a part of impedance matching.
In the present embodiment, attachment means 72 can be metallization via, then combining end 70 can be microstrip line or strip line, and microstrip line or strip line are connected with metallization via.
As shown in fig. 7, be that branch end group is 4 in the structural representation of the work(combiner device of the embodiment of the present invention four, the present embodiment, respectively branch end group 81,82,83,84, each branch end group includes two branch ends, totally 8 branch ends.That is, when the number at branch end is even number N, two branch ends can be divided into one group, N/2 branch end group is constituted.
In the present embodiment, 8 branch ends are generally aligned in the same plane, and its one end is connected with attachment means 85, and the attachment means 85 are perpendicular to plane where 8 branch ends；Each two adjacent shunt end group（Branch end group 81,82,83 and angle 84) are equal, and as seen from Figure 7,4 branch end groups are uniformly distributed so that the Wei Round hearts of attachment means 85 are radial；Parameter from each branch end group 81,82,83,84 to element of attachment means 85 is identical；Combining end 80 is connected with attachment means 85, and the plane where 8 branch ends is separated by least one layer of ground plane with the plane where combining end 80.Because the angle of adjacent shunt end group is equal, so that the wiring of each branch end group and layout are completely the same, it ensure that each branch termination receives the equivalent Space Coupling signal of adjacent position branch end transmission, therefore, the signal at all branch ends realizes constant amplitude same-phase.
Wherein, the attachment means 85 can be via, and the combining end can be for microstrip line or with wire.The embodiment of the present invention additionally provide it is a kind of include the circuit board of work(combiner device, wherein work(combiner device can be any embodiment described in embodiments of the present invention work(combiner device, and several branch ends of work(combiner device are arranged on the same layer of circuit board.
As shown in figure 8, having the board structure of circuit schematic diagram of work(combiner device for the embodiment of the present invention one, the work(combiner device of the circuit board 90 includes the branch end group of combining end 50 and at least three（Branch end group 51,52 and 53), wherein, a branch end group includes one or two branch end；The branch end of at least three branch end groups is generally aligned in the same plane, the branch end is connected with the attachment means 54 perpendicular to the plane, wherein, connect that the branch end is identical to the parameter of the element of the attachment means, the angle of each two adjacent shunt end group is equal；The combining end is connected with the attachment means, also, several branch ends are arranged on the same layer of the circuit board.
As seen from the above, because each branch end is to be uniformly distributed, and from attachment means to each
The parameter of the element at branch end is identical, and the Space Coupling signal at other branch ends that each branch termination is received is also equal, therefore, when need will signal is divided into more than 3 road signal all the way when, the signal at all branch ends realizes constant amplitude same-phase.
Wherein, the attachment means 54 can be via, and the combining end can be microstrip line or strip line.The plane where plane and combining end 50 where branch end 51,52,53 is separated by least one layer of ground plane, so, combining end 50 can be made not have signal and pass through Space Coupling to any branch end.Plane where branch end 51,52,53 can be the superficial layer of circuit board 90.
As shown in Figure 9, for the schematic cross-section in A-A faces in Fig. 8, plane 101 wherein where branch end 51,52,53 is the superficial layer of circuit board 90, combining end 50 is not in superficial layer, one layer of ground plane 104 is additionally provided with below plane 101 where branch end 51,52,53 and the phase alternating floor ground plane 103 of plane 102 where combining end 50, the plane 102 where combining end 50.Alternatively embodiment, plane 102 and ground plane 104 where combining end 50 can exchange position, then the plane 101 where branch end 51,52,53 is separated by two layers of ground plane with the plane 102 where combining end 50, can also reach same technique effect.
As shown in Figure 10, it is the structural representation for the circuit board that the embodiment of the present invention two has work(combiner device, circuit board 110 includes the work(combiner device shown in Fig. 6, also, metallization via 111 is provided between the adjacent branch end of each two, for example：The metallization via 111 of ground connection is provided between branch end 71 and its left adjacent branch end.These vias set can flow back consistent to be distributed in Round weeks symmetry shape, be further ensured that the constant amplitude same-phase of each drop-side signal beneficial to each drop-side signal.
Layer, can so prevent the Space Coupling between each branch end and combining end, so as to cause isolation inconsistent, it is to avoid the amplitude or phase of each drop-side signal change；Or, combining end 70 is perpendicular to the plane where branch end, the Space Coupling signal at so combining end 70 to each branch end is equivalent, makes the amplitude of each drop-side signal identical with phase place change, is also avoided that the amplitude or phase of each drop-side signal are inconsistent.
The above-mentioned circuit board 90 with work(combiner device is via with attachment means 54, and combining end 50 is micro-strip
Line or belt wire is set forth, it is to be understood that the attachment means 54 should with the circuit board 90 of combiner can also be via, and the cross section of its via can be combining end, and the embodiment of the present invention is not limited thereto.
In summary, the embodiment of the present invention solves the N (N that the blunt difficulty on PCB realizes small size>3) the problem of road constant amplitude same-phase work(combiner device；Work(combiner device provided in an embodiment of the present invention is embedded in PCB, also with the less advantage of area occupied；The embodiment of the present invention may apply in base station, ensure that the performance of base station.It is non-that it is limited；Although the embodiment of the present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the spirit and scope of each embodiment technical scheme of the embodiment of the present invention.
Claims (1)
- Claim1st, a kind of work(combiner device, including combining end and at least three branch end groups, it is characterised in that a branch end group includes one or two branch end；The branch end of at least three branches end group is generally aligned in the same plane, the branch end is connected with perpendicular to the attachment means of the plane, wherein, the parameter for connecting element of the branch end to the attachment means is identical, and the angle of each two adjacent shunt end group is equal；The combining end is connected with the attachment means.2nd, work(combiner device according to claim 1, it is characterised in that the attachment means are via or coaxial connector or coaxial cable, and the cross section of the via or coaxial connector or coaxial cable is the combining end.3rd, work(combiner device according to claim 1, it is characterised in that the combining end is separated by least one layer of ground level with the plane where the branch end.4th, work(combiner device according to claim 3, it is characterised in that the combining end is micro-strip line or belt wire.5th, work(combiner device according to claim 3, it is characterised in that the branch end perpendicular to the attachment means of the plane with being connected as：The branch end is connected by microstrip line or strip line with the attachment means perpendicular to the plane respectively.6th, work(combiner device according to claim 3, it is characterised in that the combining end is connected as with the attachment means：The combining end is connected by impedance matching network with the attachment means.7th, work(combiner device according to claim 5, it is characterised in that the microstrip line between the branch end and the attachment means is in series with resistance.8th, a kind of circuit board with work(combiner device, the work(combiner device includes combining end and at least three branch end groups, it is characterised in that a branch end group includes one or two branch end；The branch end of at least three branches end group is generally aligned in the same plane, the branch end is connected with perpendicular to the attachment means of the plane, wherein, the parameter for connecting element of the branch end to the attachment means is identical, and the angle of each two adjacent shunt end group is equal；The combining end is connected with the attachment means, also, several branch ends are arranged on the same layer of the circuit board. 9th, circuit board according to claim 8, it is characterised in that the attachment means are via or coaxial connector or coaxial cable, and the cross section of the via or coaxial connector or coaxial cable is the combining end.10th, circuit board according to claim 8, it is characterised in that the metallization via of ground connection is provided between the adjacent branch end group of each two.11st, circuit board according to claim 8, it is characterised in that the combining end is separated by least one layer of ground level with the plane where the branch end.12nd, circuit board according to claim 11, it is characterised in that the metallization via of ground connection is provided between the adjacent branch end group of each two.13rd, circuit board according to claim 11, it is characterised in that the branch end perpendicular to the attachment means of the plane with being connected as：The branch end is connected by microstrip line or strip line with the attachment means perpendicular to the plane respectively.14th, circuit board according to claim 11, it is characterised in that the combining end is connected as with the attachment means：The combining end is connected by impedance matching network with the attachment means.15th, circuit board according to claim 13, it is characterised in that the microstrip line between the branch end and the attachment means is in series with resistance.16th, circuit board according to claim 11, it is characterised in that the combining end is micro-strip line or belt wire.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2009/070358 WO2010088797A1 (en) | 2009-02-04 | 2009-02-04 | Power distributing combiner and circuit board having power distributing combiner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102301619A true CN102301619A (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801546833A Pending CN102301619A (en) | 2009-02-04 | 2009-02-04 | Power Distributing Combiner And Circuit Board Having Power Distributing Combiner |
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| Country | Link |
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| CN (1) | CN102301619A (en) |
| WO (1) | WO2010088797A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108232392A (en) * | 2017-12-26 | 2018-06-29 | 广东盛路通信科技股份有限公司 | Combiner and the integrated radio-frequency devices of power splitter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198060A (en) * | 1997-04-02 | 1998-11-04 | 哈里公司 | N-way RF power combiner/divider |
| CN101035208A (en) * | 2007-03-19 | 2007-09-12 | 诶比控股集团杭州南广科技有限公司 | Multi-channel microwave power synthesizer for analog/digital TV transmitter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1165096C (en) * | 2002-05-31 | 2004-09-01 | 陈兆武 | High-power multi-path synthesis/distributor |
| US8199724B2 (en) * | 2005-09-23 | 2012-06-12 | Xr Communications, Llc | Multiple beam antenna base station |
| CN100539460C (en) * | 2006-08-07 | 2009-09-09 | 西安交通大学 | A kind of wave beam switches intelligent antenna equipment |
-
2009
- 2009-02-04 CN CN2009801546833A patent/CN102301619A/en active Pending
- 2009-02-04 WO PCT/CN2009/070358 patent/WO2010088797A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198060A (en) * | 1997-04-02 | 1998-11-04 | 哈里公司 | N-way RF power combiner/divider |
| CN101035208A (en) * | 2007-03-19 | 2007-09-12 | 诶比控股集团杭州南广科技有限公司 | Multi-channel microwave power synthesizer for analog/digital TV transmitter |
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| Publication number | Publication date |
|---|---|
| WO2010088797A1 (en) | 2010-08-12 |
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Application publication date: 20111228 |