Power divider

Abstract

The application is suitable for the technical field of signal processing, and provides a power divider; the power divider comprises a power dividing circuit and a ceramic bottom plate; the power dividing circuit comprises a first inductive element and not less than two second inductive elements; one end of the first inductive element is connected with an input end; one end of each second inductive element is connected with the other end of the first inductive element; the other end of each second inductive element is respectively connected with one output end of not less than two output ends; the first inductive element and the second inductive element are used for dividing the signal of the input end to the output ends; the power dividing circuit is arranged on the ceramic bottom plate and is connected with the input end and the output end through the ceramic bottom plate; and the first inductive element and the second inductive element are respectively mounted on the ceramic bottom plate. In this way, one signal can be divided into multiple output signals, the phases of the multiple output signals are the same, the phase balance degree is better, the consistency of the output signals is met, and the volume of the power divider is reduced.

Description

Technical Field

[0001] This application belongs to the field of signal processing technology, and in particular relates to a power divider. Background Technology

[0002] A power divider is a passive RF / microwave device used to distribute the power of one input signal to two or more output ports. In existing technologies, power dividers are primarily constructed using microstrip transmission lines on printed circuit boards (PCBs) to represent inductors and capacitors. Since the length of a microstrip transmission line is proportional to its wavelength, using transmission lines increases the size of the power divider in relatively low-frequency applications, and it is difficult to meet the phase balance requirements of each output signal. Furthermore, printed circuit boards (PCBs) have relatively poor heat dissipation capabilities, preventing the components of the power divider from being densely packed. Summary of the Invention

[0003] In view of this, the embodiments of this application aim to overcome the problems of existing power dividers being large in size and having difficulty in satisfying the phase balance of each output signal.

[0004] This application provides a power divider, including: A power divider circuit, comprising a first inductor and at least two second inductors, one end of the first inductor being connected to an input terminal, one end of each second inductor being connected to the other end of the first inductor, and the other end of each second inductor being connected to one of at least two output terminals, wherein the first inductor and the second inductors are used to distribute the signal from the input terminal to the output terminal. A ceramic base plate is provided, and the power divider circuit is disposed on the ceramic base plate and connected to the input terminal and the output terminal through the ceramic base plate, wherein the first inductor and the second inductor are respectively mounted on the ceramic base plate.

[0005] In one embodiment, the power divider circuit further includes a capacitor element, one end of which is connected to the common terminal of the first inductor element and the second inductor element, and the other end of which is connected to a reference ground.

[0006] In one embodiment, the first inductor unit element includes a first ferrite core and a first winding wound on the first ferrite core, wherein the first winding and the first ferrite core form the first inductor element. Two second inductor elements constitute a first inductor unit, the first inductor unit including a second ferrite core and a second winding and a third winding wound on the second ferrite core; a second inductor element is formed between the second winding, the third winding and the second ferrite core.

[0007] In one embodiment, the second and third windings are wound with twisted pairs of wires.

[0008] In one embodiment, the system further includes a third inductor and a fourth inductor. The first inductor, the third inductor, and the fourth inductor constitute a second inductor unit. The second inductor unit further includes a fourth winding and a fifth winding wound on the first ferrite core. The fourth winding and the fifth winding are connected to the first ferrite core to form the third inductor and the fourth inductor. One end of the third inductor is connected to the common terminal of the first inductor and the second inductor, and the other end of the third inductor is connected to one end of the fourth inductor. The other end of the fourth inductor is connected to a reference ground.

[0009] In one embodiment, the first inductor unit, the second inductor unit, and the capacitor element are respectively mounted on the ceramic substrate by welding; wherein, the first winding, the second winding, the third winding, the fourth winding, and the fifth winding are enameled wires; the first inductor unit and the second inductor unit are respectively welded to the ceramic substrate through the two ends of their respective enameled wires.

[0010] In one embodiment, the power divider further includes a resistor unit, which has at least two resistor elements. One end of each resistor element is connected to a corresponding output terminal, and the other ends of each resistor element are connected to each other. The resistor elements are used to isolate the signals of each output terminal from each other.

[0011] In one embodiment, each of the resistive elements is a thick-film resistor formed on the ceramic substrate.

[0012] In one embodiment, the power divider further includes: The base, the ceramic base plate is mounted and fixed on the base, the base is provided with multiple pins, the input terminal, each of the output terminals and the reference ground are respectively led out to the outside through the corresponding pins; The input terminal, the output terminal, and the reference ground are each provided with a through hole, and the base is provided with a connecting post corresponding to the through hole. The connecting post is electrically connected to each of the pins, and the connecting post is fixed in the through hole by welding.

[0013] In one embodiment, the power divider further includes: The outer casing is mounted on the base, and the ceramic base plate is located inside the outer casing. The outer casing and the base are bonded and fixed together by epoxy resin.

[0014] The power divider provided in the first aspect of this application includes a power dividing circuit comprising a first inductor and at least two second inductors. One end of the first inductor is connected to the input terminal, one end of each second inductor is connected to the other end of the first inductor, and the other end of each second inductor is connected to one of at least two output terminals. The first and second inductors are used to distribute the signal from the input terminal to the output terminal. The power dividing circuit is disposed on a ceramic base plate and connected to the input and output terminals through the ceramic base plate, wherein the first and second inductors are respectively mounted on the ceramic base plate. In this way, one signal can be divided into multiple outputs. The first inductor evenly distributes the input signal to the second inductors of each transmission loop, ensuring that each signal has the same phase. Simultaneously, the outputs, which have the same impedance, ensure that the multiple output signals have the same phase, resulting in better phase balance and meeting the requirement of output signal consistency, while reducing the size of the power divider. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the bandpass filter circuit structure provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a ceramic base plate mounted on a base according to an embodiment of this application; Figure 3 This is a schematic diagram of another ceramic base plate mounted on a base, as provided in an embodiment of this application. Figure 4 This is a schematic diagram of the structure of the base provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the outer casing mounted on the base according to an embodiment of this application; Figure 6 A schematic diagram of the input / output interface structure of a six-channel power divider provided in an embodiment of this application; Reference numerals: 1: Pin 1, 2: Pin 2, 3: Pin 3, 4: Pin 4, 5: Pin 5, 6: Pin 6, 7: Pin 7, 8: Pin 8; Power divider circuit 10, second inductor unit 11, first inductor unit 12, enameled wire 13; Ceramic base plate 20, through hole 21; Base 30, connecting post 31; 40 for the outer casing. Detailed Implementation

[0017] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0018] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and their variations all mean "including but not limited to," unless otherwise specifically emphasized. The terms "a plurality of," and their variations all mean "two or more."

[0020] The power divider provided in this application can be applied to various application scenarios that require signal distribution to multiple outputs. The technical solution of this application will be described in detail below with reference to the accompanying drawings and embodiments.

[0021] See Figure 1 and Figure 2This application provides a power divider, including a power dividing circuit 10 and a ceramic base plate 20. The power dividing circuit 10 includes a first inductor L1 and at least two second inductors (for example, it may include six second inductors, labeled L4, L5, L6, L7, L8, and L9 respectively). One end of the first inductor L1 is connected to the input terminal, and one end of each of the second inductors L4, L5, L6, L7, L8, and L9 is connected to the other end of the first inductor L1. The other end of each of the second inductors L4, L5, L6, L7, L8, and L9 is connected to one of at least two output terminals (for example, in a six-way output power divider, the other end of each second inductor is connected to one output terminal). The first inductor L1 and the second inductors L4, L5, L6, L7, L8, and L9 are used to distribute the signal from the input terminal to the output terminal.

[0022] The power divider circuit 10 is disposed on the ceramic base plate 20 and connected to the input terminal and the output terminal through the ceramic base plate 20. The first inductor L1 and the second inductor L4, L5, L6, L7, L8 and L9 are mounted on the ceramic base plate 20.

[0023] Specifically, such as Figure 1As shown, one end of the first inductor L1 is connected to the signal input terminal to introduce the signal. After impedance matching and reduction of insertion loss, the signal is output to one end of the second inductors L4, L5, L6, L7, L8, and L9. Since there are multiple second inductors L4, L5, L6, L7, L8, and L9, one end of each second inductor L4, L5, L6, L7, L8, and L9 is connected in parallel. The other end of each second inductor L4, L5, L6, L7, L8, and L9 is connected to the corresponding output terminal. The signal introduced by the first inductor L1 is evenly distributed to one end of each first inductor unit 12, so that the input signals of each second inductor L4, L5, L6, L7, L8, and L9 are in phase, thereby reducing the phase difference of each signal. The first inductor L1 evenly distributes the introduced signal to the second inductors L4, L5, L6, L7, L8, and L9 of each transmission channel. Each second inductor then outputs the signal from its corresponding output terminal. As an example, six second inductors L4, L5, L6, L7, L8, and L9 can be used, each positioned on one of the six signal transmission channels to form a six-channel output power divider, meeting the application requirements for six-channel output. The six second inductors L4, L5, L6, L7, L8, and L9 can use the same inductance value to ensure that the six output signals have the same phase, providing better phase balance and meeting the consistency requirement of the output signals. However, since the length of a microstrip transmission line is proportional to its wavelength, using a microstrip transmission line as the equivalent inductor to construct the power divider will increase its size in applications with relatively low frequencies. In this embodiment, the first inductor L1 and the second inductors L4, L5, L6, L7, L8, and L9 are used as transmission inductors. Compared to constructing transmission inductors on a circuit board using microstrip transmission lines, this reduces the size of the power divider. Therefore, by using inductors to construct the power distribution circuit, the size of the power distribution circuit can be reduced.

[0024] The first inductor L1 and the second inductors L4, L5, L6, L7, L8, and L9 are respectively mounted on the ceramic base plate 20. Conductive circuits are provided on the outer or inner side of the ceramic base plate 20. After the first inductor L1, the second inductors L4, L5, L6, L7, L8, and L9 are mounted on the ceramic base plate 20, they can be electrically connected to each other, forming a power divider. The ceramic base plate 20 allows for rapid heat dissipation of the first inductors L1, the second inductors L4, L5, L6, L7, L8, and L9; therefore, the first inductors L1, the second inductors L4, L5, L6, L7, L8, and L9 can be integrated into a smaller space, reducing the size of the power divider circuit. The ceramic base plate 20 has good signal shielding properties, which can better ensure the integrity of radio frequency signal transmission. In applications, a large-area grounding treatment can be used for the reference ground of each component, thereby improving electromagnetic compatibility, enhancing signal anti-interference performance, and ensuring the reliability of the output signal. The power distribution circuit with the above structure can achieve the application requirements of low insertion loss and excellent phase balance, while reducing the size of the power divider.

[0025] See Figure 2 In one embodiment of this application, the power divider circuit 10 further includes a capacitor element C1, one end of which is connected to the common terminal of the first inductor element L1, the second inductor elements L4, L5, L6, L7, L8, and L9, and the other end of which is connected to a reference ground.

[0026] Specifically, by placing capacitor C1 between the common terminal of the first inductor L1, the second inductors L4, L5, L6, L7, L8, and L9, and the reference ground, impedance matching of the input signal can be achieved, reducing signal reflection and thus lowering insertion loss. Simultaneously, capacitor C1, connected to the reference ground, acts as a bypass, circumventing interference signals introduced by the first inductor, thereby filtering out high-frequency interference signals and ensuring the reliability of each output signal. Low-loss capacitors can be used for capacitor C1 to reduce heat generation.

[0027] In one embodiment of this application, a resistor R7 can be provided at the input terminal of the power divider circuit 10, and resistors R8, R9, R10, R11, R12, and R13 can be provided at each output terminal, respectively. Each resistor R7, R8, R9, R10, R11, R12, and R13 can be a 50-ohm resistor. These 50-ohm resistors serve as impedance matching resistors at the input or output terminals, further reducing insertion loss.

[0028] In one embodiment of this application, the first inductor element includes a first ferrite core and a first winding wound on the first ferrite core, wherein the first winding and the first ferrite core form the first inductor element L1.

[0029] Specifically, the first ferrite core can be made of low-loss ferrite to reduce power loss, enabling the power divider to transmit more power and reduce heat generation. This, in turn, allows the second inductor unit to be integrated into a smaller space, reducing the size of the power divider. A first inductor can be formed between the first ferrite core and the first winding wound on it. Since radio frequency signals generate corresponding impedance when passing through the inductor, impedance matching can be performed to reduce signal reflection, thereby reducing the insertion loss of the power divider. In this embodiment, using commonly used ferrite materials, and through process improvements and structural design, it is possible to distribute one signal into multiple outputs, ensuring that the phases of the multiple output signals are the same, achieving better phase balance, meeting the consistency requirements of the output signals, and simultaneously reducing the size of the power divider. This results in a power divider product with high reliability, environmental adaptability, and relatively better other electrical performance.

[0030] In one embodiment of this application, two second inductor elements (e.g., second inductor elements L4 and L5, or L6 and L7, or L8 and L9) constitute a first inductor unit 12. The first inductor unit 12 includes a second ferrite core and a second winding and a third winding wound around the second ferrite core. A second inductor element is formed between the second winding and the second ferrite core. For example, a first second inductor element (e.g., any one of second inductor elements L4, L6, and L8) is formed between the second winding and the second ferrite core, and a second second inductor element (e.g., any one of second inductor elements L5, L7, and L9) is formed between the third winding and the second ferrite core.

[0031] Specifically, by winding the second and third windings respectively around the second ferrite core, each first inductor unit 12 can include two second inductor elements, thereby reducing the number of first inductor units 12. For example, in a six-channel power amplifier, only three first inductor units 12 are needed, reducing the size of the power distribution circuit. By winding the two windings separately around the same ferrite core, the consistency of parameters of the two second inductor elements (e.g., two second inductor elements L4 and L5, or two second inductor elements L6 and L7, or two second inductor elements L8 and L9) can be ensured, reducing the inductance difference between the two inductor elements and further ensuring the phase consistency of the two output signals.

[0032] In one embodiment of this application, the second and third windings are wound with twisted-pair cables. Twisted-pair winding reduces the path differences between the second and third windings, thereby reducing the inconsistency of the parameters of the two second inductor elements, minimizing the difference in inductance, and further ensuring the consistency of the two output signals. Additionally, the inter-wire capacitance can be determined by the twisted wires. Figure 1 In the diagram, the six second inductor elements L4, L5, L6, L7, L8, and L9 also have six parasitic capacitances, labeled C2, C3, C4, C5, C6, and C7 respectively. Determining the inter-wire capacitance by twisting the wires reduces the parameter differences in parasitic capacitances, further ensuring the phase consistency of the two output signals.

[0033] like Figure 2 As shown in one embodiment of this application, the power divider further includes a third inductor L3 and a fourth inductor L4. The first inductor L1, the third inductor L3, and the fourth inductor L4 constitute a second inductor unit 11. The second inductor unit further includes a fourth winding and a fifth winding wound on the first ferrite core. The fourth winding and the fifth winding and the first ferrite core form the third inductor L3 and the fourth inductor L4. One end of the third inductor L3 is connected to the common terminal of the first inductor L1, the second inductor L4, L5, L6, L7, L8, and L9. The other end of the third inductor L3 is connected to one end of the fourth inductor L4. The other end of the fourth inductor L4 is connected to a reference ground.

[0034] Specifically, by winding the fourth and fifth windings onto the first ferrite core, the number of inductor units can be reduced, thereby reducing the size of the power divider circuit. Furthermore, by placing the series-connected third inductor L3 between the common terminal of the first inductor L1, the second inductors L4, L5, L6, L7, L8, and L9 and the reference ground, the third inductor L3 and the fourth inductor L4 can perform impedance matching on the input signal, reducing signal reflection and thus reducing the insertion loss of the power divider. Simultaneously, the third inductor L3 and the fourth inductor L4 can bypass low-frequency signals to the reference ground, thereby filtering out low-frequency interference signals. Together with the capacitor C1, they can form a bandpass filter, filtering out high- and low-pass interference signals and ensuring the reliability of the signals transmitted to each output terminal.

[0035] See Figure 2 and Figure 3 In one embodiment of this application, the second inductor unit 11 and the first inductor unit 12 are respectively mounted on the ceramic base plate 20 by welding; wherein, the first winding, the second winding, the third winding, the fourth winding, and the fifth winding are enameled wires 13; the second inductor unit 11 and the first inductor unit 12 are respectively welded to the ceramic base plate 20 through the two ends of the corresponding enameled wires 13.

[0036] Specifically, the second inductor unit 11, the first inductor unit 12, and the capacitor element C1 can be welded to the ceramic base plate 20 by electronic spot welding to ensure the robustness of the inductor units 11 and 12 and the capacitor element C1. This also reduces the capacitance between the windings of the inductor units 11 and 12 and the ceramic base plate 20, reducing parasitic capacitance and thus minimizing interference from parasitic capacitance on the transmitted signal, ensuring the reliability of signal transmission. The first, second, third, fourth, and fifth windings can each use enameled wire 13 to protect each winding, reduce wear, and provide isolation. Furthermore, the two leads of the wound inductor units 11 and 12 can be directly welded to the ceramic base plate 20, making the installation of the inductor units 11 and 12 more convenient and secure. The leads of the second inductor unit 11 and the first inductor unit 12 can be electronically spot-welded to the ceramic base plate 20. Alternatively, the inductor units 11 and 12 can be bonded and fixed using highly adhesive epoxy resin, thereby enhancing the power divider's vibration and shock resistance. For example... Figure 2 As shown, the first lead of the second inductor unit 11 is a red wire, which is soldered to the signal input terminal (e.g., the first pin 1) by soldering. The second lead of the second inductor unit 11 is a blue wire, which is soldered to the reference ground terminal (e.g., the second pin 2) by soldering. The lead of the first inductor unit 12 is a blue wire, which is soldered to the signal output terminal by soldering.

[0037] like Figure 2 As shown in one embodiment of this application, the power divider further includes a resistor unit, which has at least two resistor elements. One end of each resistor element is connected to a corresponding output terminal, and the other ends of each resistor element are connected to each other. The resistor elements are used to isolate the signals of each output terminal from each other.

[0038] Specifically, in a six-way power divider, the resistor unit has six resistive elements (such as...). Figure 1The resistors are labeled R1, R2, R3, R4, R5, and R6 respectively. One end of each resistor is connected to its respective output port, and the other ends are interconnected. By placing resistors at each output port, the resistors isolate the signals at each port, reducing crosstalk and increasing the isolation between output ports. For example, when a signal is reflected from an output port, the reflected signal can reach the interconnected common terminal through the corresponding resistor, and then reach the other ports through the common terminal. Simultaneously, the reflected signal is also transmitted through each transmission path to the common terminal of the first and second inductors, where it is redistributed to the other ports. Since the reflected signal distributed to the other ports through the isolation resistors has the same amplitude but opposite phase to the signals redistributed to the other ports by the second inductors, they can cancel each other out. This prevents the reflected signal from any port from interfering with the crosstalk of the other ports, increasing the isolation between ports and resulting in a high degree of isolation.

[0039] The power divider provided in this application embodiment, when designed as a six-output power divider, can meet the requirement of six outputs. The design employs a combination structure of three passive components: six resistors, one capacitor, and four common-mode inductors. The six resistors are connected in parallel between each pair of output terminals, serving as isolation. The capacitor, located at the ground terminal, acts as a bypass and impedance match. The inductors distribute the signal; the signal is input from pin 1, passes through the first inductor L1 for impedance matching, and is then evenly distributed to the second inductors L4, L5, L6, L7, L8, and L9, all in phase. The resistors enhance the isolation between the ports, thus achieving the requirement of six in-phase, high-isolation signal outputs.

[0040] In one embodiment of this application, each resistive element is a thick-film resistor formed on a ceramic substrate 20.

[0041] Specifically, thick-film resistors can be coated onto the inner or outer surface of a ceramic substrate using a resistive paste. This allows the thick-film resistor to be directly molded onto the ceramic base plate 20, further reducing the size of the power divider, increasing the rigidity between the resistor and the ceramic base plate 20, and enhancing vibration and shock resistance. The thick-film resistor can be a high-precision thick-film resistor.

[0042] See Figure 3 and Figure 4In one embodiment of this application, the power divider further includes: a base 30, on which a ceramic base plate 20 is mounted and fixed. The base 30 has multiple pins, with the input terminal, each output terminal, and the reference ground respectively led out through the corresponding pins. The input terminal, output terminal, and reference ground are each provided with a through hole 21. The base 30 has a connecting post 31 corresponding to the through hole 21, and the connecting post 31 is electrically connected to each pin. The connecting post 31 is fixed in the through hole 21 by welding.

[0043] Specifically, such as Figure 4 As shown, the base 30 has multiple pins and multiple connecting posts 31, and each pin is electrically connected to its corresponding connecting post 31. Figure 3 As shown, when the base 30 and the ceramic base plate 20 are installed, the connecting posts 31 can be inserted into the corresponding through holes 21 respectively. After welding, the through holes 21 and the connecting posts 31 are electrically connected, so that the signals of each input terminal, output terminal, and reference ground can be brought out to the outside through the pins. At the same time, after welding, the base 30 and the ceramic base plate 20 can be relatively fixed, the connection is more secure, and the chip mounting of the power divider can be realized.

[0044] In the application of a six-way power divider, the number of pins can be set to eight (pins correspond to...). Figure 1 The ceramic base plate 20 (marked 1 to 8) has one signal input pin, one reference ground pin, and the remaining six pins are six signal output pins. Each pin can be directly molded onto the base 30. During installation, the ceramic base plate 20 can be fixed to the base 30 by soldering. The eight pins can be nickel-plated or tin-plated on their surfaces, which greatly improves the solderability of the product.

[0045] See Figure 5 In one embodiment of this application, the power divider further includes: a housing 40, which is mounted on a base 30, a ceramic base plate 20 located inside the housing 40, and the housing 40 and the base 30 are bonded and fixed together by epoxy resin; the first inductor unit 12 and the second inductor unit 11 are respectively bonded and fixed together with the base 30 by epoxy resin.

[0046] Specifically, epoxy resin bonding can be used to fix and seal the housing 40 and the base plate, enhancing vibration and impact resistance. The housing 40 can protect the ceramic base plate 20 and its components, forming a complete power divider.

[0047] In summary, the power divider provided in this application embodiment is designed, optimized, and adjusted in terms of structure, materials, and processes to achieve the application requirements of low insertion loss, excellent phase balance, and high isolation. It also possesses vibration and shock resistance characteristics, while enhancing the reliability of the power divider to meet application requirements. It can achieve the requirement of six-channel output for the power divider, while expanding the types of power dividers and saving assembly space. In production applications, it allows for unchanged production equipment, convenient operation, and easy mass production.

[0048] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0049] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A power divider, characterized in that, include: A power divider circuit, comprising a first inductor and at least two second inductors, one end of the first inductor being connected to an input terminal, one end of each second inductor being connected to the other end of the first inductor, and the other end of each second inductor being connected to one of at least two output terminals, wherein the first inductor and the second inductors are used to distribute the signal from the input terminal to the output terminal. A ceramic base plate is provided, and the power divider circuit is disposed on the ceramic base plate and connected to the input terminal and each of the output terminals through the ceramic base plate.

2. The power divider according to claim 1, characterized in that, The power divider circuit further includes a capacitor element, one end of which is connected to the common terminal of the first inductor element and the second inductor element, and the other end of which is connected to a reference ground.

3. The power divider according to claim 2, characterized in that, The first inductor element includes a first ferrite core and a first winding wound on the first ferrite core, wherein the first winding and the first ferrite core form the first inductor element. Two second inductor elements constitute a first inductor unit, the first inductor unit including a second ferrite core and a second winding and a third winding wound on the second ferrite core; a second inductor element is formed between the second winding, the third winding and the second ferrite core.

4. The power divider according to claim 3, characterized in that, The second winding and the third winding are wound with twisted pairs.

5. The power divider according to claim 3, characterized in that, The system also includes a third inductor and a fourth inductor. The first inductor, the third inductor, and the fourth inductor constitute a second inductor unit. The second inductor unit further includes a fourth winding and a fifth winding wound on the first ferrite core. The fourth winding and the fifth winding are connected to the first ferrite core to form the third inductor and the fourth inductor. One end of the third inductor is connected to the common terminal of the first inductor and the second inductor, and the other end of the third inductor is connected to one end of the fourth inductor. The other end of the fourth inductor is connected to the reference ground.

6. The power divider according to claim 5, characterized in that, The first inductor unit, the second inductor unit, and the capacitor element are respectively mounted on the ceramic base plate by welding; wherein, the first winding, the second winding, the third winding, the fourth winding, and the fifth winding are enameled wires, and the first inductor unit and the second inductor unit are respectively welded to the ceramic base plate through the two ends of the corresponding enameled wires.

7. The power divider according to claim 2, characterized in that, It also includes a resistor unit, which has at least two resistor elements. One end of each resistor element is connected to a corresponding output terminal, and the other ends of each resistor element are connected to each other. The resistor elements are used to isolate the signals of each output terminal from each other.

8. The power divider according to claim 7, characterized in that, Each of the resistor elements is a thick-film resistor formed on the ceramic substrate.

9. The power divider according to any one of claims 3 to 8, characterized in that, Also includes: The base, the ceramic base plate is mounted and fixed on the base, the base is provided with multiple pins, the input terminal, each of the output terminals and the reference ground are respectively led out to the outside through the corresponding pins; The input terminal, the output terminal, and the reference ground are each provided with a through hole, and the base is provided with a connecting post corresponding to the through hole. The connecting post is electrically connected to each of the pins, and the connecting post is fixed in the through hole by welding.

10. The power divider according to claim 9, characterized in that, Also includes: The outer casing is mounted on the base, and the ceramic base plate is located inside the outer casing. The outer casing and the base are bonded and fixed together by epoxy resin.

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