KR20140064044A

KR20140064044A - Connector for cable improved pimd and reflection loss

Info

Publication number: KR20140064044A
Application number: KR1020120130927A
Authority: KR
Inventors: 김오섭
Original assignee: (주)에스알테크날러지
Priority date: 2012-11-19
Filing date: 2012-11-19
Publication date: 2014-05-28

Abstract

The present invention relates to a connector for a cable and, more specifically, to a connector for a cable with reduced PIMD and reflection loss as electrical characteristics by reducing the discrete connection between an outer diameter line of an inner conductor of the connector and an inner diameter line of an outer conductor. The connector for a cable with reduced PIMD and reflection loss according to the present invention includes an inner conductor; an outer conductor surrounding the inner conductor; and an insulator interposed between the inner conductor and the outer conductor. In the connector for a cable, a tapered part the outer diameter of which is gradually decreased is formed at the center part of the inner conductor.

Description

[0001] The present invention relates to a connector for a cable having improved PIMD and reflection loss,

The present invention relates to a cable connector, and more particularly, to a connector for a cable which improves the electrical characteristics PIMD and the return loss by relieving discontinuous connection of the outer diameter line of the inner conductor of the connector and the inner diameter line of the outer conductor .

The cables used to transmit power and various electrical signals generally include an inner conductor located generally at the center and an outer side, an outer conductor, an insulator interposed between the inner conductor and the outer conductor to isolate and isolate them, Lt; / RTI >

And the connector connecting the cable and the connection terminal of the electrical device comprises an inner conductor and an outer conductor respectively connected to the inner conductor and the outer conductor of the cable and an insulator interposed between the inner conductor and the outer conductor to isolate and isolate them do.

In the connector connecting the cable and the connection terminal of the electric device, reflection loss and PIMD (Passive Intermodulation Distortion) are generated in the transmission of electric power and electric signal.

The reflection loss is the ratio of the incident power to the reflected power at the time of transmission of the electric signal, when there is a mismatch point of the impedance in the transmission system,

PIMD (Passive Intermodulation Distortion) is an IMD that appears in a passive device, and IMD refers to the generation of unwanted parasitic signals by causing two or more signal frequencies to interfere with each other.

Conventional techniques for improving reflection loss and PIMD in a connector include a coaxial cable connector disclosed in Japanese Patent Application Laid-Open No. 2007-0031697 and a functional wideband connector for an antenna disclosed in Korean Patent No. 0925554.

Conventional coaxial cable connector No. 2007-0031697 and No. 0925554, "Functional Wideband Connector for Antenna", improve the connection stability between connector, cable, connector and connection terminal, improve reflection loss and PIMD Lt; / RTI >

In other words, the above-mentioned patents and registered patents prevent the deterioration of the reflection loss and the PIMD due to the unstable connection due to the lack of adhesion between the connector, the cable, the connector and the connection terminal due to accumulation of vibration such as vibration. And a technique for improving the connection stability of a connector, a cable, and a connector and a connection terminal.

The return loss and PIMD at the connector are also affected by the connection stability of the connector, the cable and the connector, but also by the mechanical structure of the connector.

That is, there is a difference between the outer diameter of the inner conductor and the inner diameter of the outer conductor at one side to which the cable is connected and at the other end to which the connection terminal of the electric device is connected. Depending on the difference, The inner-diameter line of the line becomes a discontinuous line with a change,

The discrete lines of this inner conductor and the inner diameter of the outer conductor, that is, the mechanical structure of the connector, affect the return loss and the PIMD.

Therefore, it is necessary to make the mechanical structure of the connector to be a structure that improves the reflection loss and the PIMD, and the connector that has been introduced to date ignores the reflection loss due to the mechanical structure and the influence of the PIMD. In other words, there is no prior art regarding techniques for improving return loss and PIMD through the mechanical structure of the connector.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a photograph showing a structure of a conventional connector according to the prior art.

1, the connector comprises an internal conductor 1 disposed inside, an external conductor 3 disposed outside, and an insulator 5 separating and insulating the internal conductor 1 and the external conductor 3 ,

The outer diameter 1a of one side of the inner conductor 1 and the outer diameter 1b of the other side of the inner conductor 1 and the outer conductor 1b of the other side of the outer conductor 3 are connected to each other, The outer diameter 3a on one side and the outer diameter 3b on the other side are different,

The outer surface of the inner conductor 1 and the inner surface of the outer conductor 3 are formed with stepped portions 1c and 3c which are nearly perpendicular to each other.

The points of the stepped portions 1c and 3c are points where discontinuity between the outer diameter line of the inner conductor 1 and the inner diameter line of the outer conductor 3 is large and the PIMD value is decreased by a large discontinuity.

It is considered that the point where the discontinuity is large causes the PIMD value to decrease because the impedance transmitted from the internal conductor and the external conductor is discontinuous at this point.

It is conceivable to eliminate the discontinuity of the line to improve the PIMD value due to the discontinuity of the line. If the line discontinuity is completely removed, the PIMD value is improved but the return loss value is often lowered.

Since one side and the other side of the connector must conform to the MIL standard of the cable to be connected and the electrical device connection terminal, it is actually difficult to completely eliminate line discontinuity.

In the present invention, in the case where the cable connector according to the prior art does not attempt to improve the reflection loss and the PIMD depending on the mechanical structure,

It is an object of the present invention to provide a high quality connector for a cable by improving the cable connector and improving the return loss and the PIMD by alleviating the discontinuity between the outer diameter line of the inner conductor and the inner diameter line of the outer conductor.

In order to achieve the above object, a PIMD according to the present invention and a connector for a cable improved in reflection loss

Internal conductors;

An outer conductor surrounding the inner conductor;

And an insulator interposed between the inner conductor and the outer conductor, the cable connector comprising:

And a tapered portion whose outer diameter gradually decreases is formed at an intermediate portion of the inner conductor.

And a linear portion having a constant outer diameter is formed on both sides of the inner conductor taper portion,

And an inclined portion having an inner diameter gradually decreasing is formed at a portion corresponding to the taper portion on the inner surface of the outer conductor.

The PIMD according to the present invention having the above-described structure and the connector for a cable improved in the return loss have a tapered portion tapered at an intermediate portion of the outer diameter of the inner conductor, an inclined portion at an intermediate portion of the inner diameter of the outer conductor, It improves the PIMD and return loss by mitigating the discontinuity of the conductor inner diameter line and thus improves the quality of the electric power and electric signal transmitted through the cable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a drawing showing a structure of a connector for a cable according to the prior art.
2 is a cross-sectional structural view of a cable connector according to the present invention;
FIGS. 3A and 3B are data tables in which PIMD is measured in the connector according to the prior art shown in FIG. 1 and the connector according to the present invention shown in FIG. 2, respectively.

Hereinafter, a PIMD according to the present invention and a connector for a cable with improved return loss will be described in detail with reference to the drawings.

Before describing the present invention,

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

As shown in FIG. 2, the PIMD according to the present invention and the cable connector for improved return loss are roughly divided into components of the inner conductor 10, the outer conductor 20 and the insulator 30, And the tapered portion 11 and the inclined portion 21 for relieving discontinuity are formed in the outer conductor 20 and the outer conductor 20, respectively.

An inner conductor (not shown) of the cable is inserted into the outer surface (or inner surface) of the inner conductor 10 to be in contact with the outer conductor (not shown) And is contact-coupled,

An external conductor (not shown) of the cable is inserted into the inner surface of the outer conductor 20 to be in contact with the inner surface of the outer conductor 20 and an outer terminal (not shown) of the connection terminal of the electrical device is inserted into the inner surface.

The outer and inner diameters of the inner conductor 10 and the outer conductor 20 on one side and the other side are in accordance with the specifications of the cable and connection terminal to be connected.

The insulator 30 is interposed between the inner conductor and the outer conductor 20 to isolate and isolate the inner conductor from the inner conductor and supports the inner conductor 10 so that the inner conductor 10 is stably disposed inside the outer conductor 20.

The inner conductor 10 has cutouts 12 and 13 formed on one side and the other side to provide elasticity so that the inner conductor of the cable and the inner terminal of the connection terminal are easily inserted into and tightly coupled with each other.

Straight lines 14 and 15 having diameters A and B maintained constant are formed on the inner sides of both sides where the cutouts 12 and 13 are formed,

Between the straight portions 14 and 15 on both sides, the outer diameter gradually decreases to form a tapered portion 11.

At this time, a step 16 for fixing the insulator 30, which is inserted into and coupled with the outer circumference, and a locking protrusion 17 are formed on the linear portions 14 and 15 on one side.

The outer conductor of the cable and the outer terminal of the connection terminal are inserted and coupled to the inner surface of the outer conductor 20 and the second straight portions 24 and 25 Is formed,

The inner diameter gradually decreases at a position corresponding to the tapered portion 11 to form an inclined portion 21 between the second straight line portions on both sides.

The tapered portion 11 of the inner conductor 10 and the inclined portion 21 of the outer conductor 20 relax the discontinuity of the outer diameter line of the inner conductor 10 and the discontinuity of the inner diameter line of the outer conductor 20, , Improving return loss and PIMD.

FIG. 3 is an experimental data table of PIMD measured in the connector according to the prior art shown in FIG. 1 and the connector according to the present invention shown in FIG. 2,

(2 * f2-f1) 30 dB [(-)] at 2050 MHz, which is the component that has the greatest influence on the performance among the IMD components, as compared with the connector according to the related art. 174 - (-) 144 = 30.1].

The two input frequencies f1 and f2 used in the experimental data of FIG. 3 are f1 = 2110 MHz and f2 = 2170 MHz, which are frequency bands transmitted from a WCDMA repeater (base station).

&Quot; dBc "is an absolute unit representing the intensity of the power of the actually transmitted or received signal, and" dBc ""Is a unit of exponential representation of signal magnitude.

For reference, there was no significant difference in reflection loss between the connector according to the prior art shown in FIG. 1 and the connector according to the present invention shown in FIG. 2.

That is, in general, the reflection loss is deteriorated when the PIMD is improved. However, since the reflection loss is not deteriorated even though the PIMD is improved, the reflection loss is relatively improved.

While the present invention has been described in connection with the preferred embodiments thereof with reference to the accompanying drawings, it is to be understood that the present invention is not limited to the above embodiments and various changes and modifications can be made by those skilled in the art. And variations are to be construed as falling within the scope of protection of the present invention.

10: inner conductor 11: tapered portion
20: external conductor 21: inclined portion
30: Insulator

Claims

Internal conductors;
An outer conductor surrounding the inner conductor;
And an insulator interposed between the inner conductor and the outer conductor, the cable connector comprising:

Wherein a tapered portion whose outer diameter is gradually reduced is formed at an intermediate portion of the inner conductor.

The method according to claim 1,
Wherein a straight line portion having a constant outer diameter is formed on both sides of the tapered portion of the inner conductor, and a cable connector

3. The method according to claim 1 or 2,
Wherein a tapered portion having an inner diameter gradually decreasing is formed at a portion corresponding to the tapered portion on the inner surface of the outer conductor.