Frequency-adjustable power combiner based on branch line coupler

Abstract

The utility model discloses a frequency-adjustable power combiner based on a branch line coupler, which comprises a branch line coupler body, and the branch line coupler comprises a first input port assembly, a second input port assembly, an output port assembly and a load port assembly. Connecting ports are arranged between the first input port assembly and the second input port assembly, between the first input port assembly and the output port assembly, between the second input port and the load port, and between the output port and the load port, the connecting ports are connected with one ends of a group of transmission lines, the other ends of the transmission lines are connected with the U-shaped connecting line assembly, and the U-shaped connecting line assembly is connected with the U-shaped connecting line assembly. The transmission line is detachably connected with the branch line coupler body and the U-shaped connecting line assembly through a connecting mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to a frequency adjustable power combiner based on branch line coupler. BACKGROUND

[0002] The super large power combiner is an important component in the super large power radio frequency system, and has important application in the fields of basic scientific research, nuclear physics, military, agriculture, medical treatment and the like. The super large power combiner synthesizes the output power of multiple power sources together, and the power can reach hundreds of kilowatts or even megawatt level.

[0003] When the working frequency of the power combiner needs to be arbitrarily adjustable in a wide range, one way is to use a wideband power coupler to realize it. For example, a single-section coupled stripline 3dB coupler can realize 20% relative bandwidth power synthesis. If a larger relative bandwidth is needed, multiple-section coupled stripline 3dB couplers are needed, and at this time the distance between the coupled striplines will be closer, and the power capacity of the combiner will be more limited. At the same time, the wideband power combiner cannot guarantee that the indicators of any frequency point in the working bandwidth can reach the best, and such a combiner is not suitable for the demand of arbitrarily adjustable working frequency in a wide frequency band range and narrowband working at the same time.

[0004] Compared with the 3dB coupler of coupled stripline, the 3dB coupler of Branch-line structure has a narrower working bandwidth, as shown in the following figure. However, if the working frequency of the Branch-line 3dB coupler can be adjustable, this structure is very suitable for the demand of high power level, arbitrarily adjustable working frequency in a wide frequency band range and narrowband working at the same time. Therefore, the present application aims to propose a power combiner based on the 3dB coupler of Branch-line structure to meet the demand of arbitrarily adjustable working frequency in a wide frequency band range and narrowband working at the same time. SUMMARY

[0005] The utility model discloses a frequency adjustable power combiner based on branch line coupler.

[0006] The utility model provides a kind of frequency adjustable power combiner based on branch line coupler, including branch line coupler body, the branch line coupler includes first input port component, second input port component, output port component, load port component, first input port component and second input port component between, first input port component and output port component between, second input port and load port between, output port and load port between, each is equipped with connecting port, each connecting port is connected with the one end of a group of transmission lines, the transmission line is connected with branch line coupler body by connecting mechanism, the transmission line includes multiple different lengths, and different length transmission line corresponds the working frequency of different power combiner.

[0007] Further, first input port component, second input port component, output port component, load port component include outer conductor, inner conductor, support sheet, the inner conductor is arranged in outer conductor by support sheet, support sheet is between outer conductor and inner conductor, the support sheet is non-conductor.

[0008] Further, each group of transmission lines includes U-shaped connector and two hard feed lines, the U-shaped connector includes two connecting ports, one end of two hard feed lines is connected with two connecting ports respectively, and the other end is connected with the connecting port on the branch line coupler body.

[0009] Further, the material of support sheet is Teflon.

[0010] Further, the connecting mechanism includes plug core, clamp and throat clamp.

[0011] Beneficial effects: compared with prior art, the utility model discloses a kind of frequency adjustable power combiner based on branch line coupler, by changing the original commonly used scene of branch line coupler, the mechanism of original one input port, two output ports, one isolation port is changed into the structure of two input ports, one output port, one isolation port, by the connecting structure of disassembly connection transmission line, so as to realize the working frequency adjustable of power combiner by changing the length of transmission line. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the schematic diagram of power combiner under a length transmission line;

[0013] Fig. 2 It is the schematic diagram of power combiner under another length transmission line;

[0014] Fig. 3 It is the bottom view of power combiner;

[0015] In the figure, 1 is the branch line coupler body, 2 is the hard feeder, 3 is the U-shaped connector, 4 is the second input port assembly, 5 is the load port assembly, 6 is the output port assembly, and 7 is the first input port assembly. Detailed Implementation

[0016] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0017] like Figs. 1-3 As shown, the branch line coupler body 1, hard feeder 2, U-shaped connector 3, second input port assembly 4, load port assembly 5, output port assembly 6, and first input port assembly 7 are shown.

[0018] A frequency-adjustable power combiner based on a branch-line coupler includes a branch-line coupler body 1. The branch-line coupler includes a first input port component 7, a second input port component 4, an output port component 6, and a load port component 5. Connection ports are provided between the first input port component 7 and the second input port component 4, between the first input port component 7 and the output port component 6, between the second input port and the load port, and between the output port and the load port. Each connection port is connected to one end of a set of transmission lines. That is, four connection ports correspond to four sets of transmission lines. The transmission lines are detached and connected to the branch-line coupler body 1 through a connection mechanism. The transmission lines include various lengths, and different lengths of transmission lines correspond to different operating frequencies of the power combiner.

[0019] In this example, the first input port component 7, the second input port component 4, the output port component 6, and the load port component 5 all include an outer conductor, an inner conductor, and a support plate. The inner conductor passes through the outer conductor through the support plate, and the support plate is located between the outer conductor and the inner conductor. The support plate is a non-conductor.

[0020] In this example, each transmission line group includes a U-shaped connector 3 and two hard feed lines 2. The U-shaped connector 3 includes two connection ports. One end of each of the two hard feed lines 2 is connected to the two connection ports, and the other end is connected to the connection port on the branch line coupler body 1. There are a total of 4 transmission lines and 8 hard feed lines. By replacing hard feed lines of different lengths, different operating frequencies can be adjusted.

[0021] In this example, the support sheet is made of Teflon.

[0022] In this example, the connecting mechanism includes a ferrule, a clamp, and a hose clamp.

[0023] Working principle: the Branch-line 3dB coupler in the power combiner in the fact instance designs a middle 4 root transmission line length arbitrary adjustable structure. For any working frequency in 25~50MHz range, through replacing the length of 4 groups of 8 root transmission lines, the working frequency adjustable power combiner can be realized. The connection of this structure is simple and convenient, the connection place is stable and reliable, meanwhile, the water path of the water cooling of the inner conductor of the combiner is not damaged, so that the water cooling mode of the combiner can work normally.

[0024] The above is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A frequency-tunable power combiner based on a branch-line coupler, characterized in that, The device includes a branch line coupler body, which comprises a first input port assembly, a second input port assembly, an output port assembly, and a load port assembly. Connection ports are provided between the first and second input port assemblies, between the first and output port assemblies, between the second input port and the load port, and between the output port and the load port. Each connection port is connected to one end of a set of transmission lines. The transmission lines are detached and connected to the branch line coupler body via a connecting mechanism. The transmission lines include various lengths, with different lengths corresponding to different operating frequencies of the power combiner.

2. The frequency-tunable power combiner based on a branch-line coupler according to claim 1, characterized in that, The first input port assembly, the second input port assembly, the output port assembly, and the load port assembly all include an outer conductor, an inner conductor, and a support plate. The inner conductor passes through the outer conductor via the support plate, and the support plate is located between the outer conductor and the inner conductor. The support plate is a non-conductor.

3. The frequency-tunable power combiner based on a branch-line coupler according to claim 1, characterized in that, Each transmission line group includes a U-shaped connector and two hard feeders. The U-shaped connector includes two connection ports. One end of each of the two hard feeders is connected to one of the two connection ports, and the other end is connected to the connection port on the branch line coupler body.

4. The frequency-tunable power combiner based on a branch-line coupler according to claim 2 or 3, characterized in that, The support sheet is made of Teflon.

5. The frequency-tunable power combiner based on a branch-line coupler according to claim 1, characterized in that, The connecting mechanism includes a core insert, a clamp, and a hose clamp.

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