CN103050758B - I-type five-port E-surface power divider - Google Patents
I-type five-port E-surface power divider Download PDFInfo
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Abstract
The invention discloses an I-type five-port E-surface power divider which comprises a coupling cavity and an input port, an isolation port B, an isolation port C, an output port A and an output port B communicated with the coupling cavity, wherein the input port (1), the isolation port A (2) and the isolation port B are located on the front end surface of the coupling cavity (6); the output port A is located on the left end surface of the coupling cavity; and the output port B (5) is located on the right end surface of the coupling cavity (6). The I-type five-port E-surface power divider disclosed by the invention has the characteristics of simple structure, small volume and low processing difficulty. An equal-amplitude equal-phase power divider covering full bandwidth of waveguide can be realized through the invention. Particularly when multiple power dividers are connected in series to form a large-scale network (10-1,000 paths), the main structure can be classified into a symmetric type and an asymmetric type; and when a symmetric structure is adopted, the major characteristic of the formed equal-amplitude equal-phase power divider is that theoretical phase difference and amplitude difference between two output ends are zero and the phase difference is far less than the phase difference of a common H-surface waveguide slot bridge.
Description
Technical field
The present invention relates to a kind of power splitter, specifically, relate to a kind of broadband five-port power splitter.
Background technology
Power splitter is the general original paper of one in modern microwave communication and Military Electronics system.Waveguide power divider, due to features such as its power capacity are high, insertion loss is low, is applied very extensive.Two road waveguide power dividers both can be used alone, and also can form multichannel power division network, for fields such as phased array radar, antenna array and power combing by serial connection.Existing two road waveguide power dividers mainly comprise E-MianTXing branch, H-MianTXing branch, waveguide magic T, H-face kinds of Slot Coupled Waveguide Hybrids, E-face kinds of Slot Coupled Waveguide Hybrids etc.Wherein first two device due to isolation between two outputs low, the mismatch of any one output port all can have a strong impact on amplitude and the phase accuracy of power division.Good isolation is had between the output port of waveguide magic T, and phase place between two output ports is identical, but the axis direction of its four waveguides points to three mutually perpendicular directions respectively, become complicated 3-D solid structure, difficult processing, cost is high, and device is all larger in length, width and height three, is unfavorable for the miniaturization of device.Particularly waveguide magic T is not suitable as unit serial connection formation multichannel power division network.The axis of the input and output waveguide of E-face kinds of Slot Coupled Waveguide Hybrids is positioned at same plane, can be connected in series all waveguide axis of formation thus and be positioned at conplane multichannel power division network.This power division network can be divided into base and cover plate, and process with utilizing traditional digital control milling technology disposable and convenient respectively, machining accuracy improves greatly, and processing cost reduces greatly.But, between two output ports of existing E-face kinds of Slot Coupled Waveguide Hybrids, there are 90 degree of intrinsic phase differences.When requiring same-phase to export, particularly when being connected in series formation multichannel power division network, need to carry out broadband compensation between the phase place of power splitter output port at different levels.Particularly when multichannel power division network Miniaturization Design, phase compensating circuit can make device volume and design difficulty greatly improve.
Summary of the invention
The object of the present invention is to provide the I type H face power splitter of the phases such as a kind of five-port constant amplitude of broadband.
To achieve these goals, the technical solution used in the present invention is as follows: I-type five-port E-surface power divider, comprises coupling cavity, also comprise be communicated with coupling cavity input port, isolated port A, isolated port B, output port A and output port B; Input port is positioned at the front end face of coupling cavity, and isolated port A, output port A are positioned at the left side of coupling cavity, and isolated port B, output port B are positioned at the right side of coupling cavity, and left side and right side are coupling cavity two opposites in opposition to each other.The size of coupling cavity a direction is in the horizontal plane less than or equal to the half of free space wavelength corresponding to the maximum operating frequency of this I-type five-port E-surface power divider, input port, in output port A, output port B, isolated port A and isolated port B, the Breadth Maximum of at least 3 ports is less than the maximum height of this port vertical direction.Input port, in output port A, output port B, isolated port A and isolated port B, the center electric field level component of at least 3 ports is greater than vertical component.
Above-mentioned horizontal plane refers to the upper bottom surface of coupling cavity or is parallel to the horizontal plane of coupling cavity upper bottom surface; Vertical direction refers to the direction perpendicular to horizontal plane.A direction refers to and is parallel to the direction of horizontal plane perpendicular to the direction of horizontal plane or perpendicular to input normal direction.
Described input port, output port A, output port A, isolated port A, isolated port B are empty waveguide or ridge waveguide or are with line or coaxial line.The present invention is good with waveguide and ridge waveguide.
Input port, angle between the normal direction of output port A, output port B, isolated port A and isolated port B and horizontal plane is less than 30 degree, and output port A and isolated port A projection is in the horizontal plane all in the left side of input port projection in the horizontal plane; Output port B and isolated port B projection is in the horizontal plane all on the right side of input port projection in the horizontal plane.
Angle between the projection in the horizontal plane of the opposite direction of the projection in the horizontal plane of the normal of output port A, output port B and the normal of input port or the normal of input port is greater than 60 degree and is less than 120 degree, and the angle between the projection in the horizontal plane in the other direction of the normal of the projection in the horizontal plane of the normal of isolated port A and isolated port B and input port or the normal of input port is greater than 60 degree and is less than 120 degree.
Described coupling cavity is simply connected cavity structure, and namely any closed curve of this coupling cavity inside can converge to a point continuously in this coupling cavity.
The left inside wall of described coupling cavity and right inside wall are provided with protruding A or depression, and the protrusion direction of described protruding A is pointed in coupling cavity, and the opening direction of described depression points in coupling cavity.On described coupling cavity inwall or and lower inwall be provided with at least one regulate coupling coupling body, upper inwall and lower inwall are coupling cavity two opposites in opposition to each other; Coupling body is groove or metal bosses B; The opening direction of described groove points to coupling cavity inside, and the protrusion direction of described metal bosses B points to coupling cavity inside.
On coupling cavity inwall or and lower inwall be provided with at least one coupling body, coupling body is groove or metal bosses B, and coupling body is only at its upper end or/and lower end is connected with coupling cavity inwall; In coupling cavity
withinput
relativethe inwall of coupling cavity is provided with matching body, matching body only in upper end or/and lower end is or/and side is connected with coupling cavity inwall; Metallic object is provided with in isolated port A, isolated port B.
Isolated port B, isolated port C upper inwall or and lower inwall be provided with at least one regulate coupling metallic object.
The cross section of the cross section of the cross section of described input port, the cross section of isolated port A, isolated port B, the cross section of output port A, output port B is rectangle.
Described coupling cavity, input port, output port A, output port B, isolated port A, isolated port B, matching body, groove, metal bosses B, metallic object, protruding A and depression are left and right specular arrangement relative to the normal direction of input.
Input port is symmetrical shape, the front and back of described input port before and after axis and coupling cavity to dead in line; Isolated port A and isolated port B is relative to the front and back of input port to the symmetrical arrangement of axis, and the front and back of output port A and output port B coupling cavity are to the symmetrical arrangement of axis; Coupling cavity with the front and back of input port to axis for the symmetrical structure of symmetry axis.
Described input port, output port A, output port A, isolated port A, isolated port B are empty waveguide or ridge waveguide or are with line or coaxial
structure.
Above-mentioned front and back are the axle straight line that coupling cavity front end face points to rear end face to axis.
The upper surface of the upper surface of the upper surface of described input port, the upper surface of isolated port A, isolated port B and the upper surface of output port A, output port B all with the upper surface flush of coupling cavity.
During specific implementation, the I-type five-port E-surface power divider of the present invention's design, comprises coupling cavity, the input port be communicated with coupling cavity, isolated port A, isolated port B and output port A, output port B; Described input port is positioned at the front end face of coupling cavity, and isolated port A, output port A are positioned at the left side of coupling cavity, and isolated port B, output port B are positioned at the right side of coupling cavity.The left and right inwall of described coupling cavity is provided with protruding A or depression, and the protrusion direction of described protruding A is pointed in coupling cavity, and the opening direction of described depression points in coupling cavity.The protruding A of the left and right inwall of described coupling cavity or depression are relative to the symmetrical arrangement of the normal direction of input port.
The rear end face of described coupling cavity is provided with the impedance matching body that regulates impedance matching, and the shape of impedance matching body can be arbitrary shape.The projection of shape of general matching body in coupling cavity upper surface is triangle or rectangle.
Described isolated port B and isolated port C is provided with the metallic object that at least one regulates coupling, and metallic object protrusion direction points to the inside of isolated port.
Conveniently processing, is preferentially designed to rectangle by the cross section of the cross section of the cross section of the cross section of described input port, isolated port A, isolated port B, output port A, the cross section of output port B.
Input port, isolated port A, isolated port B, output port A, output port B are provided with changeover portion.
This I-type five-port E-surface power divider is relative to the symmetrical distribution in hair line direction of input port.
Conveniently designing and calculating, coupling cavity is good with cuboid structure, and the cross section of the cross section of the cross section of input port, the cross section of isolated port A, isolated port B, the cross section of output port A, output port B is all good with rectangle.
For given design objective, comprise reflection coefficient, isolation, total insertion loss etc., in order to obtain wider bandwidth of operation, the width of coupling cavity can change according to certain rule along the front and back of input port to axis, namely the left inside wall of described coupling cavity and right inside wall is provided with protruding A or depression, the protrusion direction of described protruding A is pointed in coupling cavity, and the opening direction of described depression points in coupling cavity.The protruding A of the left and right inwall of described coupling cavity or depression are relative to the symmetrical arrangement of the normal direction of input port.Such setting can obtain wider bandwidth of operation.
In order to the bandwidth of operation of further this I-type five-port E-surface power divider of broadening, coupling cavity inside is provided with one or more groove or metal bosses B, and all grooves become symmetrical distribution with the normal direction of input port, all metal bosses B become symmetrical distribution with the normal direction of input port.
In order to improve the coupling of each port of this I-type five-port E-surface power divider, input port, isolated port A, isolated port B and output port A, output port B are provided with changeover portion.The width of changeover portion be change, also can be changeless for width.
For the ease of adopting common milling processing, all structures, the upper surface comprising coupling cavity and described input/output port is positioned at same plane, namely the upper surface of described input port, the upper surface of isolated port A, the upper surface of isolated port B and every the upper surface of output port A, output port B upper surface all with the upper surface flush of coupling cavity.
The present invention can adopt unsymmetric structure, also can adopt symmetrical structure.When adopting symmetrical structure, the maximum feature of the phase power splitter such as the constant amplitude that forms is notional phase difference between two outputs and amplitude difference is zero, be far smaller than the phase difference of the H-face kinds of Slot Coupled Waveguide Hybrids generally adopted, the phase difference namely between output port A, output port B is far smaller than the phase difference of the H-face kinds of Slot Coupled Waveguide Hybrids generally adopted.During dissymmetrical structure, notional phase difference can be less than 90 degree phase differences of H-face kinds of Slot Coupled Waveguide Hybrids, makes that phase compensation is easy, bandwidth is wider.The isolation of two output ports is far superior to the T junction, the Y type knot power splitter that generally adopt.Due to two of the H-face kinds of Slot Coupled Waveguide Hybrids notable difference between output port and input on position, the phase difference of two output in whole working band all at about 90 degree.In waveguide power divider, we usually need phase difference between two of power splitter outputs in whole working band, to be less than certain value, such as 3 degree or 5 degree.In order to meet this equiphase requirement, the most frequently used method connects waveguide phase compensating circuit at two outputs of H-face kinds of Slot Coupled Waveguide Hybrids.There is work strip width and increase the problem of power splitter volume in this compensating circuit.Particularly when adopting multistage H-face kinds of Slot Coupled Waveguide Hybrids to form multichannel power division network, the problems referred to above are more serious.Almost not isolating of the T junction adopted, Y type knot power splitter two output port, thus can influence each other between the amount of causing output port.Power splitter of the present invention, output port A, output port B are good relative to input port symmetry, ensure that the power of output port A, output port B is identical with phase place.Again due to the existence of isolated port A and isolated port B, thus ensure that the isolation of two output ports is very high.Therefore, output port A, the output port B phase place of I-type five-port E-surface power divider provided by the invention can be accomplished identical, have between output port A, output port B 20dB with good isolation, can use as single power splitter, particularly can be connected in series and form the use of multichannel power division network.Device has clear superiority in performance, bandwidth of operation and volume.
Operation principle of the present invention can be summarized as follows when symmetric form rectangular coupled cavity and rectangle input and output waveguide.Cross section is that the input port of rectangle has mainly encouraged two waveguide mode of operations, i.e. TE10 pattern and TE30 pattern in the coupling cavity of the cuboid structure be coupled by E face.The ripple of these two patterns all will be propagated along input waveguide axis direction.Because the guide wavelength of these two patterns is different, at the other end of coupling cavity, the power that output port A and output port B is coupled out from coupling cavity be the power be coupled out from the ripple of two mode of operation TE10 patterns and TE30 pattern respectively and.By choosing width and the length of coupling cavity, and input port, isolated port B, isolated port C and output port A, the size of output port B and position, can make output port A and the reflection of output port B place very little.At this moment, substantially all energy all from output port A and output port B coupling output.Anti-phasely to disappear mutually because two mode of operation TE10 patterns and the TE30 of input port excitation meets naturally at isolated port A, isolated port B place, the power be coupled out from isolated port A, isolated port B is all very little, thus make isolated port A, isolated port B uses as isolation end.In order to widen the bandwidth of operation of device further, the shape of coupling cavity, particularly width can suitably change along the front and back of input port to axis, can also increase groove or metal bosses D(metal column in coupling cavity).Each input/output terminal can increase one or more levels matching section.The shape of coupling cavity and input port, isolated port A, isolated port B and output port A, output port B for other be out of shape time, the operation principle of this I-type five-port E-surface power divider also can be set forth according to above content and be understood.
The power output of two output ports of the present invention is identical in wider working band with phase place, can be used as the excellent waveguide power divider of amplitude-phase consistency, is particularly suitable for serial connection and forms multichannel power division network.The present invention also has that structure is simple, volume is little, the feature that difficulty of processing is low.Military and the civil areas such as the present invention can be widely used in antenna array, phased array radar and power combing, missile guidance, communicate.
Accompanying drawing explanation
Fig. 1 is vertical view of the present invention.
Fig. 2 is the vertical view of embodiment 1.
Fig. 3 is the result of calculation curve of embodiment 1.
Fig. 4 is the vertical view of embodiment 2.
Fig. 5 is the vertical view of embodiment 3.
The corresponding title of attached number in the figure: 1-input port; 2-isolated port A; 4-isolated port B, 3-output port A, 5-output port B, 6-coupling cavity, 7-matching body, 8-metallic object, 10-changeover portion, the protruding A of 91-; 92-caves in, 11-metal bosses B, 12-metal groove.
In figure ↓ arrow represent front to, ↑ arrow represent rear to, ← arrow represents left direction, and → arrow represents right direction.Front and back refer to by front to the axle straight line referring to backward directions to axis.
Embodiment
embodiment 1
As shown in Figure 2,
I-type five-port E-surface power divider, comprises coupling cavity, also comprise be communicated with coupling cavity input port, isolated port A, isolated port B, output port A and output port B; Input port 1 is positioned at the front end face of coupling cavity 6, and isolated port A2, output port A3 are positioned at the left side of coupling cavity 6, and isolated port B4, output port B5 are positioned at the right side of coupling cavity 6, and left side and right side are coupling cavity 6 two opposites in opposition to each other.The size of coupling cavity 6 a direction is in the horizontal plane less than or equal to the half of free space wavelength corresponding to the maximum operating frequency of this I-type five-port E-surface power divider, input port 1, in output port A3, output port B5, isolated port A2 and isolated port B4, the Breadth Maximum of at least 3 ports is less than the maximum height of this port vertical direction.
Above-mentioned horizontal plane refers to the upper bottom surface of coupling cavity 6 or is parallel to the horizontal plane of coupling cavity upper bottom surface; Vertical direction refers to the direction perpendicular to horizontal plane.
Described input port, output port A, output port A, isolated port A, isolated port B are empty waveguide or ridge waveguide or are with line or coaxial line.The present invention is good with waveguide and ridge waveguide.
Input port 1, angle between the normal direction of output port A3, output port B5, isolated port A2 and isolated port B4 and horizontal plane is less than 30 degree, and output port A3 and isolated port A2 projection is in the horizontal plane all in the left side of input port 1 projection in the horizontal plane; Output port B5 and isolated port B4 projection is in the horizontal plane all on the right side of input port 1 projection in the horizontal plane.
Angle between the projection in the horizontal plane of the opposite direction of the projection in the horizontal plane of the normal of output port A3, output port B5 and the normal of input port 1 or the normal of input port 1 is greater than 60 degree and is less than 120 degree, and the angle between the projection in the horizontal plane in the other direction of the normal of the projection in the horizontal plane of the normal of isolated port A2 and isolated port B4 and input port 1 or the normal of input port 1 is greater than 60 degree and is less than 120 degree.
Described coupling cavity 6 is simply connected cavity structure, and namely any closed curve of this coupling cavity 6 inside can converge to a point continuously in this coupling cavity 6.
The facilities of each port is as follows:
The first situation: input port 1, angle between the hair line direction of output port A3, output port B5, isolated port A2 and isolated port B4 and horizontal plane is less than 30 degree, and output port A3, output port B5 projection are in the horizontal plane respectively on the left side and the right of input port 1 projection in the horizontal plane; Or isolated port A2 and isolated port B4 projection is in the horizontal plane respectively on the left side and the right of input port 1 projection in the horizontal plane.
The second situation: described input port 1 is positioned at the front end face of coupling cavity 6, output port A3 and output port B5 is positioned at the rear end face of coupling cavity 6, front end face and rear end face are coupling cavity 6 two opposites in opposition to each other, output port A3, angle between the projection in the horizontal plane in the other direction of the normal of the projection in the horizontal plane of the normal of output port B5 and input port 1 or the normal of input port 1 is greater than 60 degree and is less than 120 degree, angle between the projection in the horizontal plane in the other direction of the normal of the projection in the horizontal plane of the normal of isolated port A2 and isolated port B4 and input port 1 or the normal of input port 1 is greater than 60 degree and is less than 120 degree.
Specifically, there is not other devices and space in coupling cavity inside of the present invention, and namely described coupling cavity 6 is simply connected cavity structure, and namely any closed curve of this coupling cavity 6 inside can converge to a point continuously in this coupling cavity 6.
The basic configuration of coupling cavity 6 is cuboid structure, the cross section of the cross section of input port 1, the cross section of isolated port A2, isolated port B4, the cross section of output port A3, output port A3, the cross section of cross section output port B5 be rectangle.
The rear end face of coupling cavity 6 is provided with impedance matching body, i.e. matching body 7, and matching body 7 is rectangle.
The upper surface of all structures of this I-type five-port E-surface power divider is positioned at same plane, namely the upper surface of the upper surface of the upper surface of described input port 1, the upper surface of isolated port A2, the upper surface of isolated port B4 and output port A3, output port B5 all with the upper surface flush of coupling cavity 6.
As shown in Figure 3, S11 wherein in Fig. 3 represents the reflection coefficient of input port 1, S21 represents the transmission coefficient of input port 1 to isolated port A2, S21 represents the transmission coefficient of input port 1 to isolated port B4, S31 is expressed as the transmission coefficient of input port 1 to output port A3, S51 is expressed as the transmission coefficient of input port 1 to output port B5, and S53 represents the isolating coefficient of output port B5 and output port A3.
The S parameter of this I-type five-port E-surface power divider obtained according to the Structure Calculation of embodiment 1 therefrom can be found out, in 7 bandwidth of operation to 10GHz, the reflection coefficient of input port 1 is higher than 14dB, and the isolation between output port A3 and output port B5 is higher than 13dB.The transmission coefficient of isolated port A2 and isolated port B4 is all lower than 13dB, and the S parameter of output port A3 is higher than-3.5dB.Consider that this power splitter is bilateral symmetry, the S parameter of other port easily obtains.Therefore, this embodiment provides a relative bandwidth of operation 36%, and Insertion Loss is lower than 0.5dB, and isolation is better than the constant amplitude homophase waveguide power divider of 13dB.
embodiment 2
As Fig. 4. be only with the difference of embodiment 1, arrange a generation gradual change at the left inside wall of coupling cavity 6 and right inside wall, namely the left inside wall of coupling cavity 6 and right inside wall are respectively provided with a depression 92.
embodiment 3
As Fig. 5. be only with the difference of embodiment 2, the bottom surface of coupling cavity 6 be provided with regulate coupling coupling body, i.e. groove 12.
Above are only citing.In actual production, the side of coupling cavity 6 both can be one or more straightway, also can be smooth curve, formed and overlooked the rectangle in direction, trapezoidal or other more complicated patterns.Each input/output port both can be simple rectangular waveguide, also can other shapes of various shapes of axis bending.
The present invention can be realized based on said structure
.
Claims (8)
1.I type five-port E-surface power divider, it is characterized in that, comprise coupling cavity (6), input port (1), output port A(3), output port B(5), isolated port A(2) and isolated port B(4), input port (1) is positioned at the front end face of coupling cavity (6), isolated port A(2), output port A(3) be positioned at the left side of coupling cavity (6), isolated port B(4), output port B(5) be positioned at the right side of coupling cavity (6), left side and right side are coupling cavity (6) two opposites in opposition to each other; The size of coupling cavity (6) a direction is in the horizontal plane less than or equal to the half of free space wavelength corresponding to the maximum operating frequency of this I-type five-port E-surface power divider, input port (1), output port A(3), output port B(5), isolated port A(2) and isolated port B(4) in the Breadth Maximum of at least 3 ports be less than the maximum height of this port vertical direction;
Input port (1), output port A(3), output port B(5), isolated port A(2) and isolated port B(4) normal direction and horizontal plane between angle be less than 30 degree, output port A(3) and isolated port A(2) projection is in the horizontal plane all in the left side of input port (1) projection in the horizontal plane; Output port B(5) and isolated port B(4) projection is in the horizontal plane all on the right side of input port (1) projection in the horizontal plane; Described coupling cavity (6) is simply connected cavity structure, and any closed curve that namely this coupling cavity (6) is inner can converge to a point continuously in this coupling cavity (6).
2. I-type five-port E-surface power divider according to claim 1, it is characterized in that, output port A(3), output port B(5) normal projection in the horizontal plane and the opposite direction projection in the horizontal plane of the normal of input port (1) or the normal of input port (1) between angle be greater than 60 degree and be less than 120 degree; Isolated port A(2) and isolated port B(4) normal projection in the horizontal plane and the normal projection in the horizontal plane in the other direction of the normal of input port (1) or input port (1) between angle be greater than 60 degree and be less than 120 degree.
3. I-type five-port E-surface power divider according to claim 1, it is characterized in that, the left inside wall of described coupling cavity (6) and right inside wall are provided with protruding A(91) or depression (92), described protruding A(91) protrusion direction point in coupling cavity (6), the opening direction of described depression (92) points in coupling cavity (6).
4. I-type five-port E-surface power divider according to claim 3, it is characterized in that, the upper inwall of coupling cavity (6) or and lower inwall be provided with at least one coupling body, coupling body is groove (12) or metal bosses B(11), coupling body is only at its upper end or/and lower end is connected with coupling cavity inwall; The inwall of coupling cavity (6) relative with input (1) in coupling cavity (6) is provided with matching body (7), matching body (7) in upper end or/and lower end is or/and side is connected with coupling cavity (6) inwall; At isolated port A(2), isolated port B(4) in be provided with metallic object (8).
5. I-type five-port E-surface power divider according to claim 4, it is characterized in that, described coupling cavity (6), input port (1), output port A(3), output port B(5), isolated port A(2), isolated port B(4), matching body (7), groove (12), metal bosses B(11), metallic object (8), protruding A(91) and depression (92) be that left and right specular is arranged relative to the normal direction of input.
6. according to the I-type five-port E-surface power divider in claim 1-4 described in any one, it is characterized in that, described input port (1), output port A(3), isolated port A(2), isolated port B(4) be empty waveguide or ridge waveguide.
7. according to the I-type five-port E-surface power divider in claim 1-4 described in any one, it is characterized in that, cross section, the isolated port A(2 of described input port (1)) cross section, isolated port B(4) cross section, output port A(3) cross section, output port B(5) cross section be rectangle.
8. according to the I-type five-port E-surface power divider in claim 1-4 described in any one, it is characterized in that, upper surface, the isolated port A(2 of described input port (1)) upper surface, isolated port B(4) upper surface and output port A(3) upper surface, output port B(5) upper surface all with the upper surface flush of coupling cavity (6).
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| US6078227A (en) * | 1998-08-24 | 2000-06-20 | Motorola, Inc. | Dual quadrature branchline in-phase power combiner and power splitter |
| US6411174B1 (en) * | 2000-06-14 | 2002-06-25 | Raytheon Company | Compact four-way waveguide power divider |
| CN102013544A (en) * | 2010-06-30 | 2011-04-13 | 上海杰盛无线通讯设备有限公司 | Double-frequency Wilkinson power divider |
| CN202339969U (en) * | 2011-09-14 | 2012-07-18 | 苏州易特诺科技股份有限公司 | Rectangular waveguide combiner |
| CN203071205U (en) * | 2013-01-31 | 2013-07-17 | 成都赛纳赛德科技有限公司 | Miniature I type E-surface power divider |
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