Inductor and circulator

Abstract

The application discloses an inductor and circulator, and relates to the field of electronic and communication devices, which comprises a gyromagnetic ferrite and an inductor coil, an input lead group of the inductor coil is provided with an input pin, an output lead group is provided with an output pin, and the extending end of a shielding lead group is split into two bending parts, each of which is provided with a shielding pin; in a winding state, the extending direction of the input pin is parallel to the side of the gyromagnetic ferrite close to the input pin, the extending direction of the output pin is parallel to the side of the gyromagnetic ferrite close to the output pin, the extending direction of the bending part is parallel to the side of the gyromagnetic ferrite close to the bending part, and the extending direction of the shielding pin is perpendicular to the bending part. In the winding state, the input pin, the output pin and the bending part of the inductor coil can be attached to the side of the gyromagnetic ferrite, so that the inductor has a relatively regular contour, the invalid space occupied by the inductor is eliminated, the installation space of the inductor is effectively reduced, and thus the inductor can be installed on a smaller circuit substrate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electronic and communication devices, in particular to an inductor and circulator. BACKGROUND

[0002] With the steady development of the 5G era, 5G technology has become a hot topic in the current communication field. As the infrastructure of the 5G network, the construction and design of the base station are of great significance to the realization of high-speed and low-delay communication methods. And one of the important design directions of the base station miniaturization is to reduce the size of the components of the base station. As one of the important devices in the radio frequency module of the base station, the circulator has an internal circuit board, which integrates capacitors, resistors and inductors. The size of the capacitors and resistors is fixed, and the size of the inductor is determined by the inductor coil form and the magnetic core. Therefore, the size of the circuit board is mainly related to the size of the inductor, and the size of the circuit board can determine the volume of the circulator. Therefore, it can be considered that reducing the size of the inductor can reduce the volume of the circulator. Figure 1 The inventor shows an inductor coil for a circulator, which extends outward from the substrate in three groups of wires in an unfolded state, and a pin is provided at the extending end of the wire. The extending direction of the pin is the same as the extending direction of the wire. When the above-mentioned inductor coil is wound on the magnetic core, it will get Figure 2 The inductor shown has an angle of 120 degrees between the two adjacent pins. Due to the staggered edges of the pins and the edges of the magnetic core, the actual edge of the inductor at the bottom is irregular, and the actual occupied area of the inductor should be the rectangular area formed by the farthest extending end of each pin. In addition, the irregular edge is also difficult to match other components, so that part of the space occupied by the inductor is invalid. In addition, the inventor also knows a kind of arrangement of the input pin and the output pin of the circulator, as shown in Figure 3 Such an arrangement requires an additional avoidance area on the circuit board, resulting in a larger actual occupied area of the circulator than the theoretical occupied area. SUMMARY

[0003] The purpose of the present application is to provide an inductor to solve the problems existing in the prior art, which comprises a rectangular cuboid gyromagnetic ferrite and an inductor coil wound on the gyromagnetic ferrite. In the wound state, the input pin, the output pin and the bent part of the inductor coil can all fit the side edge of the gyromagnetic ferrite, so that the inductor obtains a relatively regular profile, eliminates the invalid space that the inductor needs to occupy, effectively reduces the installation space of the inductor, and thus the inductor can be installed on a smaller circuit board.

[0004] The application also provides a circulator, which comprises a constant magnetic field body, a capacitor, a resistor, a rectangular circuit substrate and the above-mentioned inductor. The inductor is arranged on the top surface of the circuit substrate, and the size of the circuit substrate matches the inductor. Compared with the prior art, the size of the circuit substrate is smaller. In addition, in the application, the input pin and the output pin of the circuit substrate are arranged at the middle positions of a pair of opposite edges respectively, and there is no need to arrange a reserved area on the circuit board on which the circulator is mounted, so that the actual occupied area of the circulator is basically the same as the theoretical area.

[0005] To achieve the above-mentioned object, the application provides the following scheme.

[0006] The application provides an inductor, which comprises a gyromagnetic ferrite in the shape of a cuboid and an inductor coil wound on the gyromagnetic ferrite. The inductor coil comprises a substrate for fitting the gyromagnetic ferrite. The substrate is provided with an outwardly extending input conductor group, an outwardly extending output conductor group and an outwardly extending shielding conductor group. The extending end of the input conductor group is provided with a bent input pin. The extending end of the output conductor group is provided with a bent output pin. The extending end of the shielding conductor group is split into two bent parts. Each free end of the bent part is provided with a shielding pin. In the wound state, the extending direction of the input pin is parallel to the side of the gyromagnetic ferrite close to the input pin. The extending direction of the output pin is parallel to the side of the gyromagnetic ferrite close to the output pin. The extending direction of the bent part is parallel to the side of the gyromagnetic ferrite close to the bent part. The extending direction of the shielding pin is perpendicular to the bent part.

[0007] In an embodiment, the input pin and the output pin are symmetrically arranged on the two sides of the gyromagnetic ferrite. The two shielding pins are arranged between the input pin and the output pin.

[0008] In an embodiment, in the wound state, the extending end of the input conductor group, the extending end of the output conductor group and the extending end of the shielding conductor group are located in the same plane. The included angle between the extending end of the input conductor group and the extending end of the shielding conductor group is 120 degrees. The included angle between the extending end of the shielding conductor group and the extending end of the output conductor group is 120 degrees. The included angle between the extending end of the output conductor group and the extending end of the input conductor group is 120 degrees.

[0009] In an embodiment, the input conductor group comprises two input conductors. The output conductor group comprises two output conductors. The shielding conductor group comprises two shielding conductors.

[0010] In an embodiment, the shape of the substrate is consistent with the shape of the fitting surface of the gyromagnetic ferrite.

[0011] The application further provides a circulator, comprising a constant magnetic field body, a capacitor, a resistor, a rectangular circuit substrate and the above-mentioned inductor, the capacitor, the resistor and the inductor are arranged on the top surface of the circuit substrate, the constant magnetic field body is arranged on the top surface of the inductor, and an insulating fixed layer is arranged between the constant magnetic field body and the inductor; a circuit substrate input pin is arranged at the middle position of the first edge of the circuit substrate, and a circuit substrate output pin is arranged on the opposite edge of the first edge and symmetrically to the circuit substrate input pin.

[0012] In an embodiment, the length of the circuit substrate is not greater than 3 mm, and the width of the circuit substrate is not greater than 3 mm.

[0013] In an embodiment, the circuit substrate is arranged on the lower shell, and the upper shell is buckled to the lower shell.

[0014] In an embodiment, the upper shell and the lower shell are made of a metal material.

[0015] In an embodiment, the number of the capacitors is 5, and the capacitors are arranged around the input pin and the output pin.

[0016] The number of the resistors is 2, and the resistors are arranged close to the shielding pin.

[0017] The application has the following technical effects relative to the prior art:

[0018] The application provides an inductor, comprising a rectangular spin magnetic ferrite and an inductor coil wound on the spin magnetic ferrite, in the wound state, the input pin, the output pin and the bent part of the inductor coil can be attached to the side edge of the spin magnetic ferrite, so that the inductor obtains a relatively regular profile, eliminates the invalid space occupied by the inductor, effectively reduces the installation space of the inductor, so that the inductor can be installed on a smaller circuit substrate.

[0019] The application further provides a circulator, comprising a constant magnetic field body, a capacitor, a resistor, a rectangular circuit substrate and the above-mentioned inductor. The inductor is arranged on the top surface of the circuit substrate, and the size of the circuit substrate matches the inductor. Compared with the prior art, the size of the circuit substrate provided by the application is smaller. In addition, the circuit substrate input pin and the circuit substrate output pin are respectively arranged at the middle positions of a pair of opposite edges in the application, so that no avoiding area needs to be arranged on the circuit board on which the circulator is installed, and the actual occupied area of the circulator is basically the same as the theoretical area. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0021] Figure 1 A schematic diagram of an inductor coil expansion structure known to an inventor;

[0022] Figure 2 A schematic diagram of an inductor structure known to an inventor;

[0023] Figure 3 A schematic diagram of a circuit board pin arrangement structure known to an inventor;

[0024] Figure 4 A schematic diagram of an inductor coil expansion structure in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of an inductor structure in an embodiment of the present application;

[0026] Figure 6 A schematic diagram of the overall structure of a circulator in an embodiment of the present application;

[0027] Figure 7 A schematic diagram of the explosion of a circulator in an embodiment of the present application;

[0028] Figure 8 A schematic diagram of an assembly structure containing a capacitor, a resistor, an inductor and a circuit board in an embodiment of the present application;

[0029] Figure 9 A schematic diagram of a circuit board pin arrangement structure in an embodiment of the present application.

[0030] Wherein, 1, upper shell; 2, constant magnetic field body; 3, inductor coil; 301, substrate; 302, input wire group; 303, output wire group; 304, shielding wire group; 4, spin magnetic ferrite; 5, capacitor; 6, resistor; 7, circuit board; 701, circuit board input pin; 702, circuit board output pin; 8, lower shell; 9, insulating fixed layer. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present specification. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] It should be understood that the structure, proportion, size and the like shown in the drawings of the present specification are only used to cooperate with the content disclosed in the present specification, so as to be understood and read by those skilled in the art, and do not have technical substantial significance, and any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technology disclosed in the present application. In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0033] It should be noted that the same reference signs in the embodiments of the present application represent the same component or the same part.

[0034] The purpose of the present application is to provide an inductor to solve the problems existing in the prior art, which includes a cuboid-shaped gyromagnetic ferrite and an inductor coil wound on the gyromagnetic ferrite. In the wound state, the input pin, the output pin and the bent part of the inductor coil can be attached to the side edge of the gyromagnetic ferrite, so that the inductor obtains a relatively regular profile, eliminates the invalid space occupied by the inductor, effectively reduces the installation space of the inductor, so that the inductor can be installed on a smaller circuit substrate.

[0035] The application also provides a circulator, which comprises a constant magnetic field body, a capacitor, a resistor, a rectangular circuit substrate and the above-mentioned inductor. The inductor is arranged on the top surface of the circuit substrate, and the size of the circuit substrate matches that of the inductor. Compared with the prior art, the size of the circuit substrate provided by the application is smaller. In addition, the input pin and the output pin of the circuit substrate are arranged at the middle positions of a pair of opposite edges respectively, and no avoiding area needs to be arranged on the circuit board on which the circulator is mounted, so that the actual occupied area of the circulator is basically the same as the theoretical area.

[0036] In order to make the above-mentioned objects, features and advantages of the application more obvious and easy to understand, the application will be further described in detail below with reference to the drawings and specific embodiments.

[0037] As shown in Figure 4 and Figure 5 , the application provides an inductor, which comprises a gyromagnetic ferrite 4 in the shape of a cuboid and an inductor coil 3 wound on the gyromagnetic ferrite 4. The inductor coil 3 comprises a substrate 301 for fitting the gyromagnetic ferrite 4, and an input lead group 302, an output lead group 303 and a shielding lead group 304 extending outwardly from the substrate 301. The extending end of the input lead group 302 is provided with a bent input pin, the extending end of the output lead group 303 is provided with a bent output pin, and the extending end of the shielding lead group 304 is split into two bent parts, and each free end of the bent part is provided with a shielding pin. In the wound state, the extending direction of the input pin is parallel to the side of the gyromagnetic ferrite 4 close to the input pin, the extending direction of the output pin is parallel to the side of the gyromagnetic ferrite 4 close to the output pin, the extending direction of the bent part is parallel to the side of the gyromagnetic ferrite 4 close to the bent part, and the extending direction of the shielding pin is perpendicular to the bent part. The input pin, the output pin and the bent part of the inductor coil 3 can all fit the side of the gyromagnetic ferrite 4, so that the inductor has a relatively regular profile, the invalid space occupied by the inductor is eliminated, the installation space of the inductor is effectively reduced, and thus the inductor can be installed on a smaller circuit substrate 7. The extending end of the shielding lead group 304 is split into two bent parts, which can overcome the problem that one extending end must be located at the central position of the edge of the gyromagnetic ferrite 4, and the two shielding pins are arranged at the sides of the gyromagnetic ferrite 4, which breaks through the existing three-pin structure. The fixing effect of the four pins is better than that of the three pins, and thus the stability of the inductor provided by the application is also improved to a certain extent after installation.

[0038] As shown in Figure 5 , in an embodiment, the input pin and the output pin are symmetrically arranged on the two sides of the gyromagnetic ferrite 4, and the two shielding pins are arranged between the input pin and the output pin.

[0039] As shown in Figure 5As shown in the figure, in an embodiment, the extending end of the input conductor group 302, the extending end of the output conductor group 303 and the extending end of the shielding conductor group 304 are located in the same plane, the angle between the extending end of the input conductor group 302 and the extending end of the shielding conductor group 304 is 120 degrees, the angle between the extending end of the shielding conductor group 304 and the extending end of the output conductor group 303 is 120 degrees, and the angle between the extending end of the output conductor group 303 and the extending end of the input conductor group 302 is 120 degrees.

[0040] As shown in the figure, Figure 4 and Figure 5 As shown in the figure, in an embodiment, the input conductor group 302 includes two input conductors, the output conductor group 303 includes two output conductors, and the shielding conductor group 304 includes two shielding conductors. The number of conductors used in each conductor group can be adjusted according to actual needs.

[0041] In an embodiment, the shape of the substrate 301 is consistent with the shape of the fitting surface of the gyromagnetic ferrite 4.

[0042] As shown in the figure, Figures 6-9 As shown in the figure, the application also provides a circulator, which includes a constant magnetic field body 2, a capacitor 5, a resistor 6, a rectangular circuit substrate 7 and the above-mentioned inductor, the capacitor 5, the resistor 6 and the inductor are arranged on the top surface of the circuit substrate 7, the constant magnetic field body 2 is arranged on the top surface of the inductor, the inductor is arranged on the circuit substrate 7, the input pin, the output pin and the shielding pin are electrically connected with the circuit substrate 7, the capacitor 5 and the resistor 6 are arranged around the inductor, and the capacitor 5 and the resistor 6 are electrically connected with the circuit substrate 7. The circuit substrate input pin 701 is arranged at the middle position of the first edge of the circuit substrate 7, the circuit substrate output pin 702 is arranged on the opposite edge of the first edge and is symmetrical to the circuit substrate input pin 701, an insulating fixing layer 9 is arranged between the constant magnetic field body 2 and the inductor, the insulating fixing layer 9 can prevent the inductor from short circuiting, reduce the energy loss of the inductor, and at the same time, can fix the inductor, so that the inductor is more stable. The size of the circuit substrate 7 matches the inductor, compared with the prior art, the size of the circuit substrate provided by the application is smaller, so that the overall size of the circulator is smaller. In addition, in the application, the circuit substrate input pin 701 and the circuit substrate output pin 702 are respectively arranged at the middle positions of a pair of opposite edges, so that there is no need to arrange a reserved area on the circuit board on which the circulator is installed, so that the actual occupied area of the circulator is basically the same as the theoretical area.

[0043] In an embodiment, the constant magnetic field body 2 is made of one of the following materials: aluminum-nickel-cobalt magnet, ferrite magnet or rare earth permanent magnet material.

[0044] In an embodiment, the length of the circuit substrate 7 is not greater than 3 mm, and the width of the circuit substrate 7 is not greater than 3 mm.

[0045] In an embodiment, the insulating fixing layer 9 is made of a high-molecular organic polymer material, such as polyethylene.

[0046] As shown in Figure 6 and Figure 7 In an embodiment, the upper shell 1 and the lower shell 8 are made of a metal material.

[0047] In an embodiment, the upper shell 1 and the lower shell 8 are made of a metal material.

[0048] As shown in Figure 7 In an embodiment, the number of the capacitors 5 is 5, the capacitors 5 are arranged around the input pins and the output pins, the number of the resistors 6 is 2, and the resistors 6 are arranged close to the shielding pins. The number of the capacitors 5 and the resistors 6 can be adjusted as needed. The capacitors 5 and the inductors work together to form a resonance circuit, which has the function of filtering non-specified frequency signals. Changing the capacity of the capacitors 5 can change the signal frequency allowed to pass through, so as to adjust and smooth the input signal and the output signal. The resistors 6 can convert the reverse input signal into heat energy consumption, thereby playing a role in shielding interference.

[0049] The principles and implementation manners of the present application are described by using specific examples in the present application. The above embodiment is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application. In conclusion, the content of the present specification should not be understood as a limitation of the present application.

Claims

1. An inductor, characterized in that: The invention comprises a rectangular parallelepiped gyromagnetic ferrite (4) and an inductor (3) wound on the gyromagnetic ferrite (4), wherein the inductor (3) comprises a substrate (301) for bonding the gyromagnetic ferrite (4), an input wire group (302), an output wire group (303) and a shielding wire group (304) extending outward are provided on the substrate (301), a bent input pin is provided at the protruding end of the input wire group (302), a bent output pin is provided at the protruding end of the output wire group (303), and the protruding end of the shielding wire group (304) is split into two bent portions, and a shielding pin is provided at the free end of each bent portion; In the wound state, the extension direction of the input pin is parallel to the side of the gyromagnetic ferrite (4) close to the input pin, the extension direction of the output pin is parallel to the side of the gyromagnetic ferrite (4) close to the output pin, the extension direction of the bent portion is parallel to the side of the gyromagnetic ferrite (4) close to the bent portion, and the extension direction of the shielding pin is perpendicular to the bent portion. The input pin, output pin and shielding pin extend out of the upper surface of the gyromagnetic ferrite (4) and then bend downward to the plane where the lower surface of the gyromagnetic ferrite (4) is located. The input pin and the output pin are symmetrically arranged on both sides of the gyromagnetic ferrite (4). The two shielding pins are both arranged between the input pin and the output pin. The input wire group (302) includes two input wires, the output wire group (303) includes two output wires, and the shielding wire group (304) includes two shielding wires. The shape of the substrate (301) is consistent with the shape of the bonding surface of the gyromagnetic ferrite (4).

2. The inductor according to claim 1, wherein: In the winding state, the protruding end of the input wire group (302), the protruding end of the output wire group (303) and the protruding end of the shielding wire group (304) are located in the same plane, the angle between the protruding end of the input wire group (302) and the protruding end of the shielding wire group (304) is 120 degrees, the angle between the protruding end of the shielding wire group (304) and the protruding end of the output wire group (303) is 120 degrees, and the angle between the protruding end of the output wire group (303) and the protruding end of the input wire group (302) is 120 degrees.

3. A circulator, characterized in that: A rectangular circuit substrate (7) comprising a constant magnetic field body (2), a capacitor (5), a resistor (6), and an inductor according to claim 1 or 2, wherein the capacitor (5), the resistor (6), and the inductor are arranged on the top surface of the circuit substrate (7), the constant magnetic field body (2) is arranged on the top surface of the inductor, and an insulating fixed layer (9) is arranged between the constant magnetic field body (2) and the inductor; The circuit substrate input pin (701) is arranged in the middle of the first side of the circuit substrate (7), and the circuit substrate output pin (702) is arranged on the opposite side of the first side and is symmetrical to the circuit substrate input pin (701).

4. The circulator according to claim 3, characterized in that: The length of the circuit substrate (7) is no greater than 3 mm, and the width of the circuit substrate (7) is no greater than 3 mm.

5. The circulator according to claim 3, characterized in that: It also includes an upper shell (1) and a lower shell (8), the circuit substrate (7) is arranged on the lower shell (8), and the upper shell (1) is buckled with the lower shell (8).

6. The circulator according to claim 5, characterized in that: The upper shell (1) and the lower shell (8) are made of metal material.

7. The circulator according to claim 3, characterized in that: The number of the capacitors (5) is 5, and the capacitors (5) are arranged around the input pin and the output pin; The number of the resistors (6) is two, and the resistors (6) are arranged close to the shielding pins.

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