Power synthesis circuit and power synthesis device

Abstract

The utility model relates to the technical field of electromagnetic wave conduction, in particular to a power synthesis circuit and a power synthesis device.The power synthesis circuit comprises a first branch, the first branch comprises a first capacitor and a first inductor, and one end of the first capacitor and one end of the first inductor are both connected with an input port of the first branch; the second branch comprises a second capacitor and a second inductor, and one end of the second capacitor and one end of the second inductor are both connected with the input port of the second branch; the trunk comprises a third capacitor, a third inductor, a fourth inductor and a fourth capacitor; the other end of the first inductor, the other end of the second inductor and one end of the third capacitor are connected with one end of the third inductor; the other end of the third inductor and one end of the fourth inductor are connected with the output port; the utility model provides the power synthesis circuit which is small in size, high in isolation degree between branches and has a harmonic suppression function, and the power synthesis device adopts the power synthesis circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic wave conduction, in particular to a power combining circuit and a power combining device. Background Art

[0002] With the development of microwave technology, the application of microwave technology is becoming more and more extensive. Its application fields include mobile communication, radar, satellite communication, and electronic countermeasure, etc. At the same time, microwave technology also has great development space in the industrial field, such as the application of microwave drying, sewage treatment and other technologies, and the application prospect is broad.

[0003] A power combining device is an important device in a microwave transmission system, which is a device that combines the energy of two or more microwave input signals into one signal energy output, and can also be used in reverse to distribute the energy of one input signal into multiple signal energy outputs. At this time, it is a power distribution device.

[0004] As Figure 1 shown, the power combining device of the prior art is mainly designed and implemented in the form of a combination of a transmission line transformer and an impedance transformer. It is large in volume and does not have a harmonic suppression function, which seriously restricts its application prospect. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a power combining circuit with a smaller volume, a higher isolation degree between branches, and a harmonic suppression function.

[0006] Another purpose of the utility model is to provide a power combining device that adopts the above power combining circuit.

[0007] The purpose of the utility model is realized through the following technical solutions:

[0008] A power combining circuit, characterized in that it includes:

[0009] A first branch, the first branch includes a first capacitor and a first inductor. One end of the first capacitor and one end of the first inductor are both connected to the input port of the first branch, and the other end of the first capacitor is grounded;

[0010] A second branch, the second branch includes a second capacitor and a second inductor. One end of the second capacitor and one end of the second inductor are both connected to the input port of the second branch, and the other end of the second capacitor is grounded;

[0011] A resistor, one end of the resistor is connected to the input port of the first branch, and the other end of the resistor is connected to the input port of the second branch;

[0012] Trunk road, the trunk road includes a harmonic suppression unit, the harmonic suppression unit includes a third capacitor, a third inductor, a fourth inductor and a fourth capacitor, the other end of the first inductor, the other end of the second inductor and one end of the third capacitor are all connected to one end of the third inductor, and the other end of the third capacitor is grounded; the other end of the third inductor and one end of the fourth inductor are both connected to the output port; the other end of the fourth inductor is connected to one end of the fourth capacitor, and the other end of the fourth capacitor is grounded.

[0013] Further, the capacitance value of the first capacitor is equal to the capacitance value of the second capacitor, and the inductance value of the first inductor is equal to the inductance value of the second inductor.

[0014] Further, the number of the first branches is at least 1, and the number of the second branches is at least 1.

[0015] Further, the number of the harmonic suppression units is at least 2, and the harmonic suppression units are arranged in series.

[0016] Further, the number of the power combining circuits is at least 2, and the power combining circuits are connected in parallel to the output port.

[0017] Further, it further includes a transmission line transformer, the other end of the third inductor and one end of the fourth inductor are both connected to the input end of the transmission line transformer, and the output end of the transmission line transformer is the output port.

[0018] A power combining device includes the power combining circuit.

[0019] The present utility model has the following advantages:

[0020] The power combining circuit of the present utility model has good in-band isolation. It uses capacitors and inductors to replace the first-stage transmission line transformer in the power combining circuit of the prior art, and can flexibly perform impedance transformation, eliminating the subsequent impedance transformation link. Its volume is significantly reduced, the isolation degree between branches is improved, and harmonics can be effectively suppressed. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a circuit schematic diagram of a power combining device in the prior art;

[0023] Figure 2It is a schematic circuit diagram of Embodiment 1 of the power combining circuit of the present utility model;

[0024] Figure 3 It is a schematic circuit diagram of Embodiment 2 of the power combining circuit of the present utility model;

[0025] Figure 4 It is a schematic circuit diagram of Embodiment 3 of the power combining circuit of the present utility model;

[0026] Figure 5 It is a schematic circuit diagram of Embodiment 4 of the power combining circuit of the present utility model;

[0027] Figure 6 It is a return loss curve diagram of the power combining device of the present utility model;

[0028] Figure 7 It is an in-band isolation curve diagram of the power combining device of the present utility model;

[0029] Figure 8 It is a harmonic suppression curve diagram of the power combining device of the present utility model;

[0030] Figure 9 It is a phase curve diagram of the power combining device of the present utility model;

[0031] In the figure: C1 - the first capacitor; L1 - the first inductor; C2 - the second capacitor; L2 - the second inductor; C3 - the third capacitor; L3 - the third inductor; C4 - the fourth capacitor; L4 - the fourth inductor; 1 - the transmission line transformer; 2 - the harmonic suppression unit. Specific embodiments

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are only a part rather than all of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is habitually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for differential description and should not be construed as indicating or implying relative importance.

[0034] In addition, terms such as "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0035] In the present utility model, unless otherwise clearly specified and defined, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being below, under, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0036] As Figures 2 to 5 shown, a power combining circuit includes:

[0037] A first branch, the first branch includes a first capacitor C1 and a first inductor L1. One end of the first capacitor C1 and one end of the first inductor L1 are both connected to the input port of the first branch, and the other end of the first capacitor C1 is grounded;

[0038] A second branch, the second branch includes a second capacitor C2 and a second inductor L2. One end of the second capacitor C2 and one end of the second inductor L2 are both connected to the input port of the second branch, and the other end of the second capacitor C2 is grounded;

[0039] A resistor R, one end of the resistor R is connected to the input port of the first branch, and the other end of the resistor R is connected to the input port of the second branch; the resistor R can improve the isolation degree between the first branch and the second branch, as shown in Figure 7 ;

[0040] Trunk road, the trunk road includes a harmonic suppression unit 2, the harmonic suppression unit 2 includes a third capacitor C3, a third inductor L3, a fourth inductor L4 and a fourth capacitor C4. The other end of the first inductor L1, the other end of the second inductor L2 and one end of the third capacitor C3 are all connected to one end of the third inductor L3, and the other end of the third capacitor C3 is grounded; the other end of the third inductor L3 and one end of the fourth inductor L4 are both connected to the output port; the other end of the fourth inductor L4 is connected to one end of the fourth capacitor C4, and the other end of the fourth capacitor C4 is grounded; the power combining circuit of the present invention uses capacitors and inductors to replace the first-stage transmission line transformer in the existing technology power combining circuit, and can flexibly perform impedance transformation, eliminating the subsequent impedance transformation link, significantly reducing its volume, and the harmonic suppression unit 2 can effectively suppress harmonics, see Figure 8 。

[0041] Further, the capacitance value of the first capacitor C1 is equal to the capacitance value of the second capacitor C2, and the inductance value of the first inductor L1 is equal to the inductance value of the second inductor L2; the capacitance values of the branch capacitors are equal, and the inductance values of the inductors are equal, which can improve the phase consistency, see Figure 9 。

[0042] Further, the number of the first branches is at least 1, and the number of the second branches is at least 1, see Figure 3 。

[0043] Further, in order to obtain a better harmonic suppression effect, the number of the harmonic suppression units 2 is at least 2, and the harmonic suppression units 2 are connected in series, see Figure 3 。

[0044] Further, the number of the power combining circuits is at least 2, and the at least 2 power combining circuits are connected in parallel to the output port; specifically, the number of the power combining circuits is n (n≥2). For the convenience of description, the n power combining circuits are respectively named the first circuit, the second circuit, the third circuit,..., and the nth circuit. The other end of the third inductor L3 and one end of the fourth inductor L4 in the first circuit are both connected to the output port, the other end of the third inductor L3 and one end of the fourth inductor L4 in the second circuit are both connected to the output port, the other end of the third inductor L3 and one end of the fourth inductor L4 in the third circuit are both connected to the output port,..., the other end of the third inductor L3 and one end of the fourth inductor L4 in the nth circuit are both connected to the output port, see Figure 4 。

[0045] Further, it further includes a transmission line transformer 1. The other end of the third inductor L3 and one end of the fourth inductor L4 are both connected to the input end of the transmission line transformer 1, and the output end of the transmission line transformer 1 is the output port. In this embodiment, the power combining circuit is a two-way circuit. For the convenience of description, the two-way power combining circuits are respectively named the first circuit and the second circuit. In the first circuit, the other end of the third inductor L3 and one end of the fourth inductor L4 are both connected to one input end of the transmission line transformer 1. In the second circuit, the other end of the third inductor L3 and one end of the fourth inductor L4 are both connected to the other input end of the transmission line transformer 1, and the output end of the transmission line transformer 1 is the output port, as shown in Figure 5 .

[0046] A power combining device includes the power combining circuit. The power combining device adopting this power combining circuit has a lower return loss, as shown in Figure 6 .

[0047] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power combining circuit, characterized in that, Comprising: A first branch, the first branch includes a first capacitor (C1) and a first inductor (L1), one end of the first capacitor (C1) and one end of the first inductor (L1) are both connected to the input port of the first branch, and the other end of the first capacitor (C1) is grounded; A second branch, the second branch includes a second capacitor (C2) and a second inductor (L2), one end of the second capacitor (C2) and one end of the second inductor (L2) are both connected to the input port of the second branch, and the other end of the second capacitor (C2) is grounded; A resistor (R), one end of the resistor (R) is connected to the input port of the first branch, and the other end of the resistor (R) is connected to the input port of the second branch; A main circuit, the main circuit includes a harmonic suppression unit (2), the harmonic suppression unit (2) includes a third capacitor (C3), a third inductor (L3), a fourth inductor (L4) and a fourth capacitor (C4), the other end of the first inductor (L1), the other end of the second inductor (L2) and one end of the third capacitor (C3) are all connected to one end of the third inductor (L3), and the other end of the third capacitor (C3) is grounded; the other end of the third inductor (L3) and one end of the fourth inductor (L4) are both connected to the output port; the other end of the fourth inductor (L4) is connected to one end of the fourth capacitor (C4), and the other end of the fourth capacitor (C4) is grounded.

2. The power combining circuit according to claim 1, wherein: The capacitance value of the first capacitor (C1) is equal to the capacitance value of the second capacitor (C2), and the inductance value of the first inductor (L1) is equal to the inductance value of the second inductor (L2).

3. The power combining circuit according to claim 2, wherein: The number of the first branches is at least 1, and the number of the second branches is at least 1.

4. The power combining circuit according to claim 3, wherein: The number of the harmonic suppression units (2) is at least 2, and the harmonic suppression units (2) are arranged in series.

5. The power combining circuit according to any one of claims 1 to 4, characterized in that: The power combining circuit is at least 2 paths, and the power combining circuits are connected in parallel to the output port.

6. The power combining circuit according to any one of claims 1 to 4, characterized in that: It further includes a transmission line transformer (1), the other end of the third inductor (L3) and one end of the fourth inductor (L4) are both connected to the input end of the transmission line transformer (1), and the output end of the transmission line transformer (1) is the output port.

7. A power combining device, characterized in that: Comprising the power combining circuit according to any one of claims 1 to 6.

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