Non-inductive leadless winding resistor suitable for high-frequency circuit

Abstract

The utility model relates to the technical field of circuit protection, in particular to a non-inductive lead-free winding resistor suitable for a high-frequency circuit, which comprises a resistor body, the resistor body comprises a base, a resistance wire is arranged on the surface of the base, a shielding cover is arranged on the outer surface of the base, the shielding cover is coated outside the resistance wire, and the resistance wire is arranged in the shielding cover. The non-inductive leadless winding resistor comprises a base, a resistance wire is arranged in the base, a shielding cover is arranged in the base, an identification layer for identification is arranged on the surface of the shielding cover, two ends of the base are fixedly connected with a pair of electrodes, and the electrodes are electrically connected with two ends of the resistance wire respectively. Therefore, the inductive effect of the resistor itself is almost completely eliminated, and inductive reactance caused by magnetic field interference is avoided. Therefore, the resistor can work stably in a high-frequency circuit, the influence on the phase and the amplitude of the signal is extremely small, and the quality and the transmission stability of the signal are effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of circuit protection, more particularly to a non -inductive non -lead wire winding resistor suitable for high frequency circuit. BACKGROUND

[0002] Under the tide of modern electronic technology's rapid development, the application field of high frequency circuit is expanding unceasingly, from the 5G base station of communication field, satellite communication equipment, to the high -speed processor of computer field, high -performance display card, and the performance of high frequency circuit is directly related to the efficiency of whole electronic system. However, traditional resistor exposes many problems under high frequency environment, and it is difficult to meet the increasingly stringent requirements of high frequency circuit.

[0003] The alternating magnetic field generated by the traditional resistor will also produce electromagnetic interference on the surrounding circuit elements. On the high-density circuit board, various electronic components are arranged closely, and the magnetic field interference of the traditional resistor may affect the normal work of the nearby capacitors, inductors and other components, thereby interfering with the stability of the entire circuit system. In addition, the lead of the traditional resistor is equivalent to a small antenna at high frequency, which will receive and radiate electromagnetic interference, further aggravating the complexity and severity of magnetic field interference.

[0004] Therefore, there is an urgent need for a non-inductive non-lead wire winding resistor suitable for high frequency circuit to improve the deficiencies of the prior art. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a non-inductive non-lead wire winding resistor suitable for high frequency circuit to solve the problems raised in the background art.

[0006] To achieve the above object, the utility model provides a non-inductive non-lead wire winding resistor suitable for high frequency circuit, which comprises a resistor body, the resistor body comprises a base, the base surface is provided with a resistance wire, the base outer surface is equipped with a shielding cover, the shielding cover is covered outside the resistance wire, the shielding cover surface is equipped with an identification layer for identification, the base two ends are fixedly connected with a pair of electrodes, and the electrodes are electrically connected with both ends of the resistance wire respectively.

[0007] As a further improvement of the technical solution, the shielding cover is made of metal material and is fixedly connected with the base.

[0008] As a further improvement of the technical solution, the identification layer is formed by printing or engraving, and is used for marking resistance parameter information.

[0009] As a further improvement of the technical solution, the electrode is a block structure and extends to the outside of the base.

[0010] As a further improvement of the technical solution, the base is made of ceramic insulating material.

[0011] Compared with the prior art, the utility model has the beneficial effects of:

[0012] The non-inductive non-lead winding resistor suitable for high-frequency circuit adopts the folding winding technology, the magnetic field generated by the current in the winding is counteracted, thereby almost completely eliminating the inductance effect of the resistor itself, avoiding the inductance generated by the magnetic field interference. This makes the resistor work stably in the high-frequency circuit, has little influence on the phase and amplitude of the signal, effectively guarantees the quality and transmission stability of the signal, and the design of the non-lead completely eliminates the problem of receiving and radiating electromagnetic interference under high frequency as an antenna by the lead of the traditional resistor. At the same time, since the magnetic field interference of the resistor itself is eliminated, the resistor will not have adverse effects on the surrounding circuit elements, significantly reducing the electromagnetic compatibility problem of the entire circuit system, and improving the stability and reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a whole structure schematic view of the embodiment;

[0014] Fig. 2 It is a resistance body cut structure schematic view of the embodiment.

[0015] The meanings of various reference numerals in the drawings are as follows:

[0016] 1, resistance body;10, base;11, resistance wire;12, shielding cover;13, identification layer;14, electrode. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0018] Please refer to Figs. 1-2 The embodiment provides a non-inductive non-lead winding resistor suitable for high-frequency circuit, which comprises a resistance body 1, the resistance body 1 comprises a base 10, the surface of the base 10 is provided with resistance wire 11, the outer surface of the base 10 is provided with shielding cover 12, the shielding cover 12 is covered outside the resistance wire 11, the surface of the shielding cover 12 is provided with identification layer 13 for identification, the base 10 is fixedly connected with a pair of electrodes 14 at both ends, and the electrodes 14 are electrically connected with both ends of the resistance wire 11 respectively.

[0019] The working principle is as follows: firstly, the current flows into the electrode 14 at one end of the base 10, passes through the resistance wire 11 wound on the surface of the base 10, and then flows out from the electrode 14 at the other end. In this process, the resistance wire 11 hinders the current according to its own resistance characteristics, thereby achieving the adjustment of the current and voltage in the circuit. Due to the folding winding technology, the magnetic field generated by the resistance wire 11 is offset, and the inductance effect is almost eliminated, avoiding the generation of inductive reactance due to magnetic field interference, thereby ensuring the stability of the signal phase and amplitude. At the same time, the shielding cover 12 on the outer surface of the base 10 can effectively block the alternating magnetic field generated by the resistance wire 11 from interfering with the outside world, and also prevent external electromagnetic interference from affecting the operation of the resistor. The identification layer 13 on the surface is convenient for identification. Through the leadless design and the above structure, the magnetic field interference problem of the traditional resistor in high-frequency use is effectively solved, and the stable operation of the high-frequency circuit is ensured.

[0020] In order to reduce the interference of the magnetic field during use, in the embodiment, the shielding cover 12 is made of metal material and is fixedly connected with the base 10. The identification layer 13 is formed by printing or engraving and is used for marking resistance parameter information. When the resistor is working, the alternating magnetic field generated by the resistance wire 11 will generate an induced current in the metal shielding cover 12. The magnetic field generated by the induced current is opposite to the original magnetic field, thereby offsetting part of the original magnetic field. The alternating magnetic field generated by the resistance wire 11 is constrained inside the shielding cover 12, and the radiation to the outside is reduced. At the same time, the magnetic field outside will also generate an induced current on the surface of the shielding cover 12, which will also generate a reverse magnetic field to resist the interference of the external magnetic field on the inside of the resistor, thereby reducing the influence of the magnetic field on the operation of the resistor.

[0021] The leadless design completely eliminates the problem that the lead of the traditional resistor receives and radiates electromagnetic interference at high frequency. Therefore, in the embodiment, the electrode 14 is in a block structure and extends to the outside of the base 10. The electrode 14 is designed in a block structure and extends to the outside of the base 10. This design avoids the existence of the traditional lead, and completely eliminates the problem that the lead receives and radiates electromagnetic interference at high frequency.

[0022] In order to increase the stability of the resistor, in the embodiment, the base 10 is made of ceramic insulating material. The thermal stability and chemical stability of the ceramic material are also good. The physical and chemical properties change little under different temperature, humidity and other environmental conditions, thereby increasing the stability of the whole resistor and ensuring the stable operation of the resistor in a complex high-frequency circuit working environment.

[0023] The non-inductive non-lead winding resistor suitable for high frequency circuit in the embodiment, in specific use, first, the resistor adopts non-lead design, the electrode 14 is block structure and extends to the outside of the base 10. This design avoids the existence of traditional lead, and completely eliminates the problem that the lead receives and radiates electromagnetic interference as an antenna under high frequency. The current flows into the electrode 14 at one end of the base 10, passes through the resistance wire 11 wound on the surface of the base 10, and then flows out from the electrode 14 at the other end. In this process, the resistance wire 11 plays a hindering role to the current according to its resistance characteristics, realizing the adjustment of current and voltage in the circuit. Since the folding winding technology is adopted, the magnetic field generated by the resistance wire 11 is offset, and the inductance effect is almost eliminated, avoiding the generation of inductance due to magnetic field interference, and ensuring the stability of signal phase and amplitude. At the same time, when the resistor works, the alternating magnetic field generated by the resistance wire 11 will make the metal shielding cover 12 generate induced current, and the magnetic field generated by the induced current is opposite to the original magnetic field direction, thereby offsetting part of the original magnetic field, restraining the alternating magnetic field generated by the resistance wire 11 in the shielding cover 12, and reducing its outward radiation. At the same time, the magnetic field in the external environment will also generate induced current on the surface of the shielding cover 12, which will also generate a reverse magnetic field to resist the interference of the external magnetic field on the inside of the resistor, so as to reduce the influence of the magnetic field on the work of the resistor. The surface identification layer 13 is convenient for identification. Through the non-lead design and the above structure, the whole resistor effectively solves the magnetic field interference problem of the traditional resistor when used at high frequency, and guarantees the stable operation of the high frequency circuit.

[0024] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and do not limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A non-inductive, leadless wire-wound resistor suitable for high-frequency circuits, comprising a resistor body (1), characterized in that: The resistor body (1) includes a base (10), a resistance wire (11) is provided on the surface of the base (10), a shield (12) is provided on the outer surface of the base (10), the shield (12) covers the outside of the resistance wire (11), the surface of the shield (12) is provided with an identification layer (13) for identification, and a pair of electrodes (14) are fixedly connected to both ends of the base (10), the electrodes (14) are electrically connected to both ends of the resistance wire (11).

2. The non-inductive, leadless wire-wound resistor suitable for high-frequency circuits according to claim 1, characterized in that: The shield (12) is made of metal and is fixedly connected to the base (10).

3. The non-inductive, leadless wire-wound resistor suitable for high-frequency circuits according to claim 1, characterized in that: The marking layer (13) is formed by printing or engraving and is used to mark resistance parameter information.

4. The non-inductive, leadless wire-wound resistor suitable for high-frequency circuits according to claim 1, characterized in that: The electrode (14) has a block structure and extends to the outside of the base (10).

5. The non-inductive, leadless wire-wound resistor suitable for high-frequency circuits according to claim 1, characterized in that: The base (10) is made of ceramic insulating material.

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