CN110391488A - coaxial cable - Google Patents

Abstract

A kind of coaxial cable, including center conductor, the winding body for being wound in the center conductor periphery, the inner insulating layer for being coated on the winding body periphery, the shielded layer being coated on outside the inner insulating layer and the external insulation layer for being coated on the shielded layer periphery, the winding body of the center conductor periphery be formed with the air gap contacted with the center conductor；The reflection of the application coaxial cable is small, is lost low.

Description

coaxial cable

technical field

This application relates to the field of electrical connectors, especially a coaxial cable.

Background technique

Existing coaxial cables generally include a central conductor, an inner insulating layer covering the central conductor, a shielding layer covering the inner insulating layer, and an outer insulating layer covering the shielding layer. The radio frequency signal will be emitted during transmission, causing loss, and the central conductor transmits the radio frequency signal, and the reflection of the radio frequency signal in the air medium is small, but the reflection in the general insulating material is relatively large.

Contents of the invention

In view of this, it is necessary to provide a coaxial cable that can reduce reflection to control radio frequency loss.

In order to solve the above technical problems, the present application provides a coaxial cable, comprising a central conductor, a winding body wound around the outer periphery of the central conductor, an inner insulating layer covering the periphery of the winding body, and a winding body wrapped around the The shielding layer outside the inner insulating layer and the outer insulating layer covering the outer periphery of the shielding layer, the winding body on the outer periphery of the central conductor forms an air gap in contact with the central conductor.

Preferably, the winding body is a helical winding structure, and the air gap is a gap of the helical winding structure.

Preferably, the helical pitch of the helical winding body is between 0.1 mm and 10 mm.

Preferably, the helical pitch of the helical winding body is between 2-8mm.

Preferably, the diameter of the winding body is larger than the thickness of the inner insulating layer.

Preferably, the central conductor is formed by hinged core wires.

The coaxial cable of the present application winds the winding body between the central conductor and the inner insulating layer, so that the outer circumference of the central conductor forms a spiral air gap to reduce the reflection of the radio frequency signal transmitted by the central conductor, Reduce loss.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application.

Fig. 1 is the perspective view of the coaxial cable of the present application;

Fig. 2 is a partial enlarged view of the dotted circle shown in Fig. 1;

Fig. 3 is a sectional view along A-A dotted line shown in Fig. 1;

Fig. 4 is a sectional view along the broken line B-B shown in Fig. 1;

FIG. 5 is a combination diagram of the central conductor and the winding body of the coaxial cable of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings.

Please refer to FIG. 1 and FIG. 2, the coaxial cable of the present application includes a central conductor 10, a winding body 50 wound around the outer periphery of the central conductor 10, an inner insulating layer 20 wrapped around the outer periphery of the winding body 50, a wrapping The shielding layer 30 covering the inner insulating layer 20 and the outer insulating layer 40 covering the outer periphery of the shielding layer 30 .

Please continue to refer to FIG. 3 to FIG. 5, the winding body 50 is made of insulating material, the winding body 50 is spirally wound around the outer periphery of the central conductor 10, and the inner insulating layer 20 is tightly wrapped around the The diameter of the winding body 50 is greater than the thickness of the inner insulating layer 20 , thereby forming a spiral air gap 60 on the outer periphery of the central conductor 10 . The helical pitch h of the winding body 50 is about 0.1-10mm. Theoretically speaking, the larger the helical pitch h, the better, but it needs to be enough to support the inner insulating layer 20 from collapsing and occupying the air gap. 60. Preferably, the helical pitch h is between 2-8 mm.

The central conductor 10 is a single core wire, and the effect of using a single core wire is better, but the design hardness of a single core wire is relatively high, and it is not easy to bend; therefore, the central conductor 10 is generally hinged by multiple core wires Formed, such as 3, 5, 7, etc.

The shielding layer 30 is a metal braiding layer, which plays a role of shielding signals, and is consistent with the shielding layer of a conventional coaxial cable. The outer insulating layer 40 is tightly wrapped around the outer periphery of the shielding layer 30 .

The coaxial cable of the present application winds the winding body 50 between the central conductor 10 and the inner insulating layer 20, so that the outer circumference of the central conductor 10 forms a spiral air gap 60 to reduce the transmission of the central conductor 10. The reflection of the radio frequency signal reduces the loss.

The above descriptions are only examples of the present application, and are not intended to limit the present application. For those skilled in the art, various modifications and changes may occur in this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims (6)

1. a kind of coaxial cable, which is characterized in that including center conductor, the winding body that is wound in the center conductor periphery, packet It the inner insulating layer for being overlying on the winding body periphery, the shielded layer being coated on outside the inner insulating layer and is coated on outside the shielded layer The external insulation layer in week, the winding body of the center conductor periphery are formed with the air gap contacted with the center conductor.

2. coaxial cable as described in claim 1, which is characterized in that the winding body is spiral winding structure, the air Gap is the gap of the spiral winding structure.

3. coaxial cable as claimed in claim 2, which is characterized in that the spiral spacing of the screw type winding body is 0.1- Between 10mm.

4. coaxial cable as claimed in claim 3, which is characterized in that the spiral spacing of the screw type winding body is 2-8mm Between.

5. coaxial cable as claimed in claim 2, which is characterized in that the diameter of the winding body is greater than the inner insulating layer Thickness.

6. coaxial cable as described in claim 1, which is characterized in that the center conductor is that more core wires hingedly form.