CN221669055U - A compact five-port high-power adjustable power divider - Google Patents

Abstract

The utility model relates to a compact five-port high-power adjustable power divider, comprising three interconnected T-shaped waveguides, two straight waveguides connected to the T-shaped waveguides for installing short-circuit pistons, two short-circuit pistons, and a set of servo motor drive mechanisms for driving the short-circuit pistons to move. It can transmit high-power microwave signals, and the power distribution is adjustable. In the actual use of the electron linear accelerator, only one matching load is required, which reduces the use cost.

Description

A compact five-port high-power adjustable power divider

Technical Field

The utility model relates to the technical field of adjustable power dividers, in particular to a compact five-port high-power adjustable power divider.

Background Art

A power divider is a device that divides one input signal into two or more equal or unequal outputs. It can also combine multiple signal energies into one output. It is also called a combiner. A certain degree of isolation should be ensured between the output ports of a power divider. A power divider is also called an overcurrent divider. It is divided into active and passive types. It can evenly divide one signal into several outputs. Generally, each divided signal has a few dB of attenuation. The signal frequency is different, and the attenuation is different for different dividers. In order to compensate for the attenuation, a passive power divider is made by adding an amplifier.

In the existing technology, a scheme 1 is such as the Chinese patent application with publication number CN115173013A, which discloses a high-power power divider with continuously adjustable power distribution ratio, including a main body, characterized in that it includes at least three interconnected 3db couplers, including a 3db coupler for overall signal input, a 3db coupler for overall signal output and a 3db coupler for phase adjustment, the input of the 3db coupler for overall signal input includes signal input and load input; the output of the 3db coupler for overall signal output includes a first signal output and a second signal output; at least one of the two external ports of the 3db coupler for phase adjustment is connected to a waveguide short circuiter, the phase of the waveguide short circuiter is adjustable, and the waveguide short circuiter is controlled by a servo motor system, and the movement of the short-circuit surface of the waveguide short circuiter can be manually, electrically and remotely controlled to realize the adjustable output power function of the power divider.

In the existing technology, the second scheme is a Chinese patent application with a publication number of CN112103606A, which discloses an adjustable coaxial line power divider and a method of use, wherein the divider includes: a first input port, first to fourth output ports, a microwave coaxial transmission line, first to third impedance adders and first to second short-circuit pistons, wherein the first output port and the third output port are respectively connected to the first impedance adder; the first input port is connected to the second impedance adder; the second output port and the fourth output port are respectively connected to the third impedance adder; the third output port is also connected to the first short-circuit piston, and the fourth output port is also connected to the second short-circuit piston, which is used to change the position of the two short-circuit pistons to adjust the power distribution ratio; the first to third impedance adders are connected by a microwave coaxial transmission line with a length of λ/4, which is used to ensure that the impedance value of the first input port is always matched during the adjustment process. The divider has a simple and compact structure and can be scaled to any band to meet the needs of different applications.

The above-mentioned prior art solutions have the following defects: The core solution of Solution 1 is to use three 3dB couplers and two waveguide short circuits to adjust the position of the short circuit piston and the power distribution ratio. It has six ports, is bulky and expensive. In addition, in the actual use of the electron linear accelerator, only one output power needs to be adjusted. With this solution, a 3dB port on the input side and a port on the output side need to be connected to the matching load at the same time. This requires two matching loads. The high-power matching load is expensive, which increases the cost of use.

The core solution of the second scheme is to use three impedance adders (T-shaped coaxial lines) and two short circuits, adjust the position of the short circuit piston, and adjust the power distribution ratio. It has five ports and a compact structure. In actual use, only one matching load is required. However, the coaxial transmission line structure cannot transmit high-power microwave signals.

Utility Model Content

In view of the shortcomings of the prior art, the purpose of the utility model is to provide a compact five-port high-power adjustable power divider, which can transmit high-power microwave signals and has adjustable power distribution. In the actual use of an electron linear accelerator, only one matching load is required, thereby reducing the cost of use.

The above utility model object of the utility model is achieved through the following technical solutions:

A compact five-port high-power adjustable power divider comprises three interconnected T-shaped waveguides, two straight waveguides connected to the T-shaped waveguides for mounting short-circuit pistons, two short-circuit pistons and a set of servo motor drive mechanisms for driving the short-circuit pistons to move.

As a further technical solution of the utility model: one port of the T-shaped waveguide located in the middle position is the signal input port of the adjustable power divider, one port of the two T-shaped waveguides on both sides is the signal output port, and the other port is connected to the short-circuit piston. By adjusting the position of the short-circuit piston, the phase difference of the signals at the two output ports of the power divider can be adjusted, thereby realizing the adjustment of the power distribution ratio.

As a further technical solution of the utility model: the servo motor drive mechanism is connected to a servo motor controller, and the servo motor controller is used to remotely control the servo motor drive mechanism to achieve driving of the short-circuit piston.

As a further technical solution of the utility model: in actual use, when the T-shaped waveguide only needs one output port, a matching absorption load is connected to the other output port.

As a further technical solution of the utility model: the distance between the two short-circuit pistons differs by 1/4 wavelength.

As a further technical solution of the utility model: the microwave power signal input cross-section of the signal input port of the T-shaped waveguide is rectangular.

In summary, the utility model includes at least one of the following beneficial technical effects:

The utility model discloses a compact five-port high-power adjustable power divider, which adopts three T-shaped waveguides and two waveguide short-circuits to adjust the position of the short-circuit piston to achieve power distribution. Because a rectangular waveguide is adopted, high-power microwave signals can be transmitted. The T-shaped waveguide has a compact structure, so the entire power divider has a compact structure. Two ports of the five-port power divider are used to install the short-circuit piston, one port is used for power input, and the other two ports are for power output. In actual use, only one output port needs to be connected to a matching load, which reduces the number of high-power matching loads used and reduces the cost of use. It can transmit high-power microwave signals, and the power distribution is adjustable. In the actual use of the electron linear accelerator, only one matching load is needed, which reduces the cost of use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a side view of the utility model.

FIG2 is a cross-sectional view along the A-A dividing line in FIG1 .

FIG. 3 is a diagram showing the analysis results of specific software of the present invention.

FIG. 4 is a diagram showing the analysis results of specific software of the present invention.

Figure numerals: 1, signal input port; 2, signal output port; 3-4, short-circuit piston port; 5, signal output port; 6-8, T-shaped waveguide; 9-10, straight waveguide; 11-12, short-circuit piston; 13-14, piston drive rod; 15, servo motor drive mechanism; 16, absorption load; 17, servo motor controller.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set/connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Embodiment 1:

1-2, a compact five-port high-power adjustable power divider disclosed in the utility model includes three interconnected T-shaped waveguides, two straight waveguides connected to the T-shaped waveguides for mounting short-circuit pistons, two short-circuit pistons, and a set of servo motor drive mechanisms 15 for driving the short-circuit pistons to move. Further, the servo motor drive mechanism 15 is connected to the short-circuit piston 11 through the piston drive rod 13, and the servo motor drive mechanism 15 is connected to the short-circuit piston 12 through the piston drive rod 14.

Among them, the three T-shaped waveguides are respectively T-shaped waveguide 6, T-shaped waveguide 7, and T-shaped waveguide 8, the two straight waveguides are respectively straight waveguide 9 and straight waveguide 10, and the two short-circuit pistons are respectively short-circuit piston 11 and short-circuit piston 12.

One port of the T-shaped waveguide 6 located in the middle position is the signal input port 1 of the adjustable power divider, one port of the two T-shaped waveguides on both sides is the signal output port, and the other port is connected to the short-circuit piston. By adjusting the position of the short-circuit piston, the phase difference of the signals at the two output ports of the power divider can be adjusted, thereby realizing the adjustment of the power distribution ratio.

Specifically, one port of the T-shaped waveguide 7 is the signal output port 2, and the other port is connected to the short-circuit piston port 3. One port of the T-shaped waveguide 8 is the signal output port 5, and the other port is connected to the short-circuit piston port 4.

The servo motor drive mechanism 15 is connected to a servo motor controller 17, which is used to remotely control the servo motor drive mechanism 15 to drive the short-circuit piston. In actual use, when the T-shaped waveguide only needs one output port, a matching absorption load is connected to the other output port. The distance between the two short-circuit pistons differs by 1/4 wavelength. The microwave power signal input cross-section of the signal input port of the T-shaped waveguide is rectangular.

In this embodiment, a rectangular cross-section waveguide is used, and the 2998.8MHz signal of the S band is taken as an example, which can be scaled to other bands. The adjustable power divider has a simple and compact structure and can transmit high-power microwave signals. When only one output port is needed in actual use, a matching absorption load is connected to the other output port.

Implementation principle:

After the microwave power signal enters the microwave input port 1 of the T-shaped waveguide 6 with a rectangular cross-section, it is divided into two and enters the T-shaped waveguide 7 and T-shaped waveguide 8 on both sides respectively; the T-shaped waveguide 7 outputs one signal to the microwave signal port output 2, and the other signal enters the straight waveguide 9 and is reflected by the short-circuit piston 11; similarly, the T-shaped waveguide 8 outputs one signal to the microwave signal port output 5, and the other signal enters the straight waveguide 10 and is reflected by the short-circuit piston 12; the signal reflected by the short-circuit pistons 11 and 12 reaches the signal input port 1 of the T-shaped waveguide 6. Since the distance between the two pistons differs by 1/4/wavelength, the phases of the two reflected signals are exactly opposite here, so there is no reflected power at the microwave signal input port 1; at the two signal output ports 2 and 12, the signal output At port 5, there is also a signal reflected by the two short-circuit pistons 11 and 12, which is superimposed on the signal from the direct output port of T-shaped waveguide 7 and T-shaped waveguide 8; by adjusting the positions of short-circuit pistons 11 and 12, the phase value of the reflected signal can be adjusted; the power ratio of the microwave signals at signal output port 2 and signal output port 5 is related to the phase difference of the signals at these two output ports, so adjusting the position of the short-circuit piston can adjust the power distribution ratio; the relationship between the signal power ratio and the phase difference can be obtained through numerical simulation or experimental test; in actual use, often only one output signal is needed, for example, only the signal from signal output port 5 is needed, then a matching absorption load 16 is connected to signal output port 2 to absorb the microwave power.

Experimental data:

The piston movement range is 0-71 mm, and the power adjustment range is 0-35 dB; during the piston movement of 0-71 mm, the standing wave ratio of the microwave input port 1 is very small, and the reflected power is very small.

Referring to Figure 3, the piston movement range is 0-71 mm, and the power adjustment range is 0-35 dB. Referring to Figure 4, during the piston movement of 0-71 mm, the standing wave ratio of the microwave input port 1 is very small, and the reflected power is very small.

The implementation principle of the utility model is as follows: The utility model discloses a compact five-port high-power adjustable power divider, which adopts three T-shaped waveguides and two waveguide short-circuits to adjust the position of the short-circuit piston to achieve power distribution. Because a rectangular waveguide is adopted, high-power microwave signals can be transmitted. The T-shaped waveguide has a compact structure, so the entire power divider has a compact structure. Two ports of the five-port power divider are used to install the short-circuit piston, one port is used for power input, and the other two ports are for power output. In actual use, only one output port needs to be connected to a matching load, which reduces the number of high-power matching loads used and reduces the cost of use. It can transmit high-power microwave signals, and the power distribution is adjustable. In the actual use of the electron linear accelerator, only one matching load is required, which reduces the cost of use.

The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims (6)

1. A compact five-port high-power adjustable power divider, characterized in that it comprises three interconnected T-shaped waveguides, two straight waveguides connected to the T-shaped waveguides for mounting short-circuit pistons, two short-circuit pistons and a servo motor drive mechanism (15) for driving the short-circuit pistons to move. 2. According to claim 1, a compact five-port high-power adjustable power divider is characterized in that one port of the T-shaped waveguide (6) located in the middle position is the signal input port of the adjustable power divider, one port of the two T-shaped waveguides on both sides is the signal output port, and the other port is connected to the short-circuit piston. By adjusting the position of the short-circuit piston, the phase difference of the signals at the two output ports of the power divider can be adjusted, thereby realizing the adjustment of the power distribution ratio. 3. A compact five-port high-power adjustable power divider according to claim 1, characterized in that the servo motor drive mechanism (15) is connected to a servo motor controller (17), and the servo motor controller (17) is used to remotely control the servo motor drive mechanism (15) to realize the driving of the short-circuit piston. 4. A compact five-port high-power adjustable power divider according to claim 1, characterized in that, in actual use, when the T-shaped waveguide only needs one output port, a matching absorption load (16) is connected to the other output port. 5. A compact five-port high-power adjustable power divider according to claim 1, characterized in that the distance between the two short-circuit pistons differs by 1/4 wavelength. 6. A compact five-port high-power adjustable power divider according to claim 1, characterized in that the microwave power signal input cross-section of the signal input port of the T-shaped waveguide (6) is rectangular.