CN113257547A

CN113257547A - Radio frequency pulse transformer

Info

Publication number: CN113257547A
Application number: CN202110605844.9A
Authority: CN
Inventors: 陈益芳; 胡利华; 肖倩; 刘季超; 易楚; 徐妍; 王智会
Original assignee: Shenzhen Zhenhua Ferrite and Ceramic Electronics Co Ltd
Current assignee: Shenzhen Zhenhua Ferrite and Ceramic Electronics Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-08-13

Abstract

The application provides a radio frequency pulse transformer, includes: the pin is arranged at the left edge and the right edge of the shell; the first magnetic core is arranged in the shell, and a first coil is wound on the first magnetic core; the second magnetic core is arranged in the shell, and a second coil and a third coil are wound on the second magnetic core; the first coil, the second coil and the third coil are provided with leads at the end parts thereof, and the leads are wound on the pins; a first capacitor, wherein a lead wire at the end part of the first coil is connected with the first capacitor; and a lead wire at the end part of the second coil is connected with the second capacitor. The problem that the existing radio frequency transformer cannot output radio frequency pulse signals is solved.

Description

Radio frequency pulse transformer

Technical Field

The application relates to the technical field of electronic elements, in particular to a radio frequency pulse transformer.

Background

The electronic equipment using the radio frequency pulse signal as the excitation has the following outstanding advantages: continuous discharge can be realized, and the electric energy utilization rate is high; the discharge is stable; the working voltage is low, which is beneficial to prolonging the service life of the equipment and has safe use. However, the existing rf transformer is widely applied to various low-power electronic circuits to achieve functions of impedance matching, dc isolation, common mode suppression, and the like, and only outputs rf signals, but does not have the performance of outputting pulse signals.

Disclosure of Invention

The embodiment of the application provides a radio frequency pulse transformer, and solves the problem that the existing radio frequency transformer cannot output radio frequency pulse signals.

The invention is realized in such a way that a radio frequency pulse transformer comprises:

the pin is arranged at the left edge and the right edge of the shell;

the first magnetic core is arranged in the shell, and a first coil is wound on the first magnetic core;

the second magnetic core is arranged in the shell, and a second coil and a third coil are wound on the second magnetic core;

the first coil, the second coil and the third coil are provided with leads at the end parts thereof, and the leads are wound on the pins;

a first capacitor, wherein a lead wire at the end part of the first coil is connected with the first capacitor;

and a lead wire at the end part of the second coil is connected with the second capacitor.

According to the radio frequency pulse transformer provided by the embodiment of the application, the coil is wound on the first magnetic core and the second magnetic core to form the radio frequency transformer, then the lead of the radio frequency transformer is connected to the first capacitor and the second capacitor to form a radio frequency pulse network structure, and the radio frequency characteristic and the pulse characteristic are integrated in the same transformer, so that the transformer outputs a radio frequency pulse signal, the functions of low insertion loss and balanced-unbalanced conversion of the transformer are realized, and the radio frequency pulse transformer has good output rise time.

In one embodiment, the first coil, the second coil and the third coil are all formed by winding copper wires, and the copper wires are enameled copper wires.

In one embodiment, the pins are made of iron-nickel alloy.

In one embodiment, the rf pulse transformer further includes a soldering-facilitating layer applied to the leads.

In one embodiment, the easy-soldering layer is a gold-plated nickel layer.

In one embodiment, the rf pulse transformer further includes an adhesive filled in the interior of the housing to fix the first magnetic core, the second magnetic core, the first coil, the second coil, the third coil, the first capacitor, and the second capacitor to the housing.

In one embodiment, the adhesive is an epoxy.

In one embodiment, the housing is made of a steel material; the surface of the shell is electroplated with a nickel layer, and the thickness of the nickel layer is 15-25 microns.

In one embodiment, the first magnetic core and the second magnetic core are both double-hole magnetic cores.

In one embodiment, the rf pulse transformer further includes an upper cover welded to the housing to seal the interior of the housing.

According to the technical scheme, the embodiment of the invention has the following beneficial effects: the structure of the radio frequency pulse network is arranged in the transformer, so that the radio frequency characteristic and the pulse characteristic are integrated in the same transformer, the transformer outputs a radio frequency pulse signal, the functions of low insertion loss and balanced-unbalanced conversion of the transformer are realized, and the transformer has good output rise time; in addition, the anti-vibration, anti-impact and weldable performances of the radio frequency pulse transformer are improved by selecting the manufacturing materials of the radio frequency pulse transformer and arranging the easy-welding layer and the adhesive piece, so that the reliability of the radio frequency pulse transformer is enhanced.

Drawings

Fig. 1 is an internal structural diagram of a radio frequency pulse transformer according to an embodiment of the present application.

Fig. 2 is a schematic circuit diagram of an rf pulse transformer according to an embodiment of the present application.

Fig. 3 is a top view of an rf pulse transformer according to an embodiment of the present application.

Reference numerals: 10. a housing; 11. a pin;

20. a first magnetic core; 21. a first coil;

30. a second magnetic core; 31. a second coil; 32. a third coil;

40. a first capacitor; 50. a second capacitor;

60. an easily weldable layer; 70. and (4) bonding the parts.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features.

The same reference numerals are used for the same components or parts in the embodiments of the present application, and for the same parts or parts in the embodiments of the present application, the reference numerals may be used for only one of the parts or parts in the drawings.

Fig. 1 is a diagram illustrating an internal structure of a radio frequency pulse transformer according to a preferred embodiment of the present invention, and fig. 3 is a top view of the radio frequency pulse transformer according to the embodiment of the present invention, which only shows a part related to the embodiment for convenience of description, and the following details are described below:

referring to fig. 1 and 3, a radio frequency pulse transformer provided by the embodiment of the present application includes a housing 10, where pins 11 are provided at left and right edges of the housing 10; a first magnetic core 20, the first magnetic core 20 is arranged inside the shell 10, and a first coil 21 is wound on the first magnetic core 20; a second magnetic core 30, wherein the second magnetic core 30 is arranged inside the shell 10, and a second coil 31 and a third coil 32 are wound on the second magnetic core 30; the first coil 21, the second coil 31 and the third coil 32 are all provided with leads at the ends thereof, and the leads are wound around the pins 11; a first capacitor 40, wherein a lead at the end of the first coil 21 is connected with the first capacitor 40; and a second capacitor 50, wherein the lead wire at the end part of the second coil 31 is connected with the second capacitor 50.

According to the radio frequency pulse transformer provided by the embodiment of the application, the radio frequency transformer is formed by winding coils on the first magnetic core 20 and the second magnetic core 30, then the lead of the radio frequency transformer is connected to the first capacitor 40 and the second capacitor 50 to form a radio frequency pulse network structure, and the radio frequency characteristic and the pulse characteristic are integrated in the same transformer, so that the transformer outputs a radio frequency pulse signal, the functions of low insertion loss and balanced-unbalanced conversion of the transformer are realized, and the radio frequency pulse transformer has good output rise time.

Optionally, the first magnetic core 20 and the second magnetic core 30 are both double-hole magnetic cores, the coil penetrates through the double holes of the magnetic cores to be wound, so that two coils can be wound on one magnetic core, the assembly space of the radio frequency pulse transformer is saved, military requirements are met, and meanwhile, the test requirements of GJB1521A and GJB360B are met, the first magnetic core 20 and the second magnetic core 30 adopt soft magnetic ferrite magnetic cores, and are sintered by adopting a ferrite high-temperature sintering technology, and metal materials are added during molding, so that the high-stability and low-loss magnetic core has the advantages of high stability and low loss, and can resist high temperature.

In one embodiment, the first coil 21, the second coil 31, and the third coil 32 are made of copper wires, and the copper wires are enameled copper wires. The enameled copper wire has high working temperature and good nickel immersion effect.

Specifically, the first coil 21 is wound on the first core 20 to form a first inductor, the second coil 31 and the third coil 32 are wound on the second core 30 to form a second inductor and a third inductor, referring to fig. 2, L1 refers to the first inductor, L2 refers to the second inductor, L3 refers to the third inductor, C1 refers to the first capacitor 40, C2 refers to the second capacitor 50, and L3, C1, and C2 may serve as matching impedances. The ports of the circuit of fig. 2 are numbered identically to the pins of fig. 1, i.e. the input of the circuit of fig. 2 is numbered 2, i.e. the lead at the end of the first coil 21 of fig. 1 is connected to the pin numbered 2, one of the outputs of the circuit of fig. 2 is numbered 6, i.e. the lead at the end of the first coil 21 of fig. 1 is connected to the pin numbered 6, and the other output of the circuit of fig. 2 is numbered 4, i.e. the lead at the end of the second coil 31 of fig. 1 is connected to the pin numbered 4.

In one embodiment, the pin 11 is made of iron-nickel alloy. The pin 11 made of the iron-nickel alloy can enhance the weldability of the pin 11, and is favorable for the lead wire at the end of the coil to be welded with the pin 11 more firmly.

In one embodiment, the rf pulse transformer further includes a soldering-facilitating layer 60, and the soldering-facilitating layer 60 is coated on the lead 11. The solderable layer 60 may enhance the solderability of the lead 11.

In one embodiment, the easy-to-weld layer 60 is optionally a gold-plated nickel layer. The nickel has excellent welding performance, the welding performance of the radio frequency pulse transformer is further improved, and the nickel is more easily attached to the pin 11 made of the iron-nickel fixed expansion alloy.

In one embodiment, the rf pulse transformer further includes an adhesive 70, and the adhesive 70 is filled in the housing 10 to fix the first core 20, the second core 30, the first coil 21, the second coil 31, the third coil 32, the first capacitor 40, and the second capacitor 50 to the housing 10. The first magnetic core 20, the second magnetic core 30, the first coil 21, the second coil 31, the third coil 32, the first capacitor 40 and the second capacitor 50 can be integrated with the housing 10 by the adhesive 70, so that the vibration and shock resistance of the rf pulse transformer can be ensured.

In one embodiment, the adhesive 70 is optionally an epoxy. Epoxy resins are also known as artificial resins, synthetic resins, resin glues, and the like. Is an important thermosetting plastic and is widely used for adhesives, coatings and the like. In other embodiments, other thermosets may be used for the adhesive 70.

In one embodiment, optionally, the housing 10 is made of steel material; the surface of the shell 10 is electroplated with a nickel layer, and the thickness of the nickel layer is 15-25 microns.

The shell 10 is made of No. 10 steel material, the No. 10 steel has good plasticity and toughness, is easy to form by cold and hot processing, has good cutting processing performance after normalizing or cold processing, and has excellent weldability; the nickel layer plated on the surface of the shell 10 can prevent the shell 10 from rusting, and the nickel layer has high temperature resistance, so that the high temperature resistance of the radio frequency pulse transformer can be improved, and the military requirement can be met.

In one embodiment, the rf pulse transformer further includes an upper cover welded to the housing 10 to seal the inside of the housing 10. Specifically, the shell 10 and the upper cover can be welded together by adopting a parallel seam welding process to improve the sealing performance of the radio frequency pulse transformer; optionally, the surface of the rf pulse transformer may be printed with a mark, for example, the mark is printed on the outer surface of the housing 10 or the surface of the upper cover, specifically, the mark is printed on the surface of the rf pulse transformer by using a laser marking machine, and the depth of the printed mark may be controlled in the process of marking the mark, so as to meet the application requirement of the rf pulse transformer on salt spray resistance.

When assembling the rf pulse transformer according to the present embodiment, the first magnetic core 20, the second magnetic core 30, the first capacitor 40 and the second capacitor 50 are first disposed inside the housing 10, then the first coil 21 is formed by winding a copper wire on the first magnetic core 20, the second coil 31 and the third coil 32 are formed by winding a copper wire on the second magnetic core 30, the lead wire at the end of the copper wire is wound on the lead 11, then the lead wire at the end of the first coil 21 is connected to the first capacitor 40, the lead wire at the end of the second coil 31 is connected to the second capacitor 50, and finally the housing 10 is filled with the adhesive 70 to fix the first magnetic core 20, the second magnetic core 30, the first coil 21, the second coil 31, the third coil 32, the first capacitor 40 and the second capacitor 50 as a whole with the housing 10. The radio frequency pulse transformer of the embodiment is convenient to assemble and operate and easy to realize batch production.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A radio frequency pulse transformer, comprising:

the device comprises a shell (10), wherein pins (11) are arranged on the left edge and the right edge of the shell (10);

the first magnetic core (20), the first magnetic core (20) is arranged inside the shell (10), and a first coil (21) is wound on the first magnetic core (20);

a second magnetic core (30), wherein the second magnetic core (30) is arranged inside the shell (10), and a second coil (31) and a third coil (32) are wound on the second magnetic core (30);

the first coil (21), the second coil (31) and the third coil (32) are provided with lead wires at the ends thereof, and the lead wires are wound on the pins (11);

a first capacitor (40), wherein a lead wire at the end part of the first coil (21) is connected with the first capacitor (40);

a second capacitor (50), wherein the lead wire at the end part of the second coil (31) is connected with the second capacitor (50).

2. The radio frequency pulse transformer according to claim 1, wherein the first coil (21), the second coil (31) and the third coil (32) are all made of copper wires by winding, and the copper wires are enameled copper wires.

3. The rf pulse transformer according to claim 1, wherein the pin (11) is made of an iron-nickel alloy.

4. The rf pulse transformer according to claim 3, further comprising a solderable layer (60), the solderable layer (60) being applied to the leads (11).

5. The rf pulse transformer of claim 4, wherein the easy-to-weld layer (60) is a gold-plated nickel layer.

6. The rf pulse transformer according to claim 1, further comprising an adhesive (70), wherein the adhesive (70) is filled in an interior of the housing (10) to fix the first core (20), the second core (30), the first coil (21), the second coil (31), the third coil (32), the first capacitor (40), and the second capacitor (50) to the housing (10).

7. The radio frequency pulse transformer of claim 6, wherein the adhesive (70) is an epoxy.

8. The radio frequency pulse transformer according to claim 1, characterized in that the housing (10) is made of steel material;

the surface of the shell (10) is electroplated with a nickel layer, and the thickness of the nickel layer is 15-25 microns.

9. The rf pulse transformer according to any of claims 1-8, wherein said first core (20) and said second core (30) are both double-bore cores.

10. The rf pulse transformer according to claim 9, further comprising an upper cover welded to the housing (10) to seal the interior of the housing (10).