KR20100079358A - Phase adjustment device for use in radio frequency transmission lines - Google Patents

Phase adjustment device for use in radio frequency transmission lines Download PDF

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Publication number
KR20100079358A
KR20100079358A KR1020080137812A KR20080137812A KR20100079358A KR 20100079358 A KR20100079358 A KR 20100079358A KR 1020080137812 A KR1020080137812 A KR 1020080137812A KR 20080137812 A KR20080137812 A KR 20080137812A KR 20100079358 A KR20100079358 A KR 20100079358A
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KR
South Korea
Prior art keywords
transmission line
housing
socket
high frequency
phase
Prior art date
Application number
KR1020080137812A
Other languages
Korean (ko)
Inventor
심관보
Original Assignee
연합정밀주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 연합정밀주식회사 filed Critical 연합정밀주식회사
Priority to KR1020080137812A priority Critical patent/KR20100079358A/en
Publication of KR20100079358A publication Critical patent/KR20100079358A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/06—Coaxial lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/18—Phase-shifters

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

The present invention provides a phase adjusting device for a high frequency transmission line having a desired phase and of a suitable length for transmitting a high frequency signal. The phase adjusting device includes: a first transmission line element and a second transmission line element obtained by dividing the high frequency transmission line of the length into two; A socket coupled to the end of the first transmission line element, and a pin coupled to the end of the second transmission line element fitted in the socket; A first housing having a joint portion surrounding the socket and an extension portion thereof and a coupling portion to which an end portion of the second transmission line is fitted, and having a screw groove formed therein; A second housing having a threaded groove formed therein so as to surround the end of the second transmission line therein and protrude the pins to the outside; The first housing and the second housing are joined to each other by screwing so that the pins fit into the sockets; The distance between the socket edge and the second transmission line edge may be adjusted by the degree of screwing, thereby allowing the phase to be adjusted.

Description

Phase adjustment device for use in radio frequency transmission lines

The present invention relates to a high frequency transmission line, and more particularly to a precision phase control device for a high frequency transmission line.

In general, when a high frequency signal is to be transmitted, a radio wave transmission line such as a coaxial cable is used. For example, in equipment within a base station or in precision electronic equipment for military use, the length of the radio transmission line used is very precise when the desired phase of one high frequency signal or multiple high frequency signals is to be transmitted from one place to another. It must be designed and manufactured to achieve the transmission of high frequency signals with the desired phase.

Hereinafter, a conventional coaxial cable design and manufacturing method for high frequency signal transmission will be described with reference to the accompanying drawings.

A desired coaxial cable 1 for high frequency signal transmission and coaxial connectors 2 provided at both ends of this cable are shown in FIG. 1 (a). In addition, Figure 1 (b) shows a pin (3) to be coupled to the coaxial cable (1), Figure 1 (c) shows that it is coupled to the pin (3) to the coaxial cable (1), Figure 1 (d) shows that the coaxial connector 2 is coupled to the assembly in FIG.

For example, the wavelength of the radio wave may be represented by λ, C may be represented by the speed of radio wave, and f may be represented by λ = C / f. For example, in the wavelength λ of the radio wave of 1 GHz, since C = 3x10 8 m and f = 10 9 Hz, it becomes (3x10 8 ) / 10 9 = 0.3 m. Or 300 mm. At this time, since the wavelength of 300 mm is a phase of 360 degrees, it is necessary to adjust the length of about 0.83 mm to adjust the phase 1 degree. If it is desired to adjust 0.1 degree precisely, the length of 0.083mm should be adjusted.

As such, with respect to the length of the coaxial cable, as shown in FIG. 1 (d), the coaxial cable 1 has a designed phase and has a cable length La that allows a high frequency signal to be transmitted from one side to the other side. Can be designed in advance. In other words, in order to determine the length La of a coaxial cable assembly to be phased, the physical length La calculated by the frequency used and the required phase is required. As shown in a), the length of Lb is determined. Next, as shown in FIG. 1 (d), the pins 3 are fixed by soldering (S2) to both ends of the coaxial cable 1 produced with La as shown in FIG. 1 (c). ) And the cable 1 are completed by soldering (S1).

In practice, however, errors may occur when fitting the cable lengths La or Lb as designed. That is, the phase of the completed cable may differ from the required phase. Or it may be necessary to match two or more cable phases.

In either case, after re-melting the S1 and S2 soldered parts, separating the cable 1 and the connector 2, readjusting Lb, and then reworking the process of Figs. 1 (b) to 1 (d). There is a feeling. In particular, accurately matching the phases of two or more cables is a very difficult task and requires a lot of labor. Moreover, if there are a large number of bones to be produced, it would be very cumbersome to repeat them as above.

The present invention has been made to solve the problems of the prior art, and an object of the present invention is to adjust a transmission line length having a desired desired phase and designed to transmit a high frequency signal, without the troublesome work as in the prior art. It is to provide a precise phase control device for a high frequency transmission line that can be phased correctly.

According to the object of the present invention, there is provided a phase adjusting device of a high frequency transmission line having a desired phase and of a suitable length for transmitting a high frequency signal. The phase adjusting device includes: a first transmission line element and a second transmission line element obtained by dividing the high frequency transmission line of the length into two; A socket coupled to the end of the first transmission line element, and a pin coupled to the end of the second transmission line element fitted in the socket; A first housing having a joint portion surrounding the socket and an extension portion thereof, the coupling portion to which an end portion of the second transmission line is fitted, and having a screw groove formed therein; A second housing having a threaded groove formed therein so as to surround an end of the second transmission line therein and protrude the pin to the outside; The first housing and the second housing are coupled to each other by screwing so that the pins fit into the sockets; According to the screwing degree, the distance between the socket edge and the second transmission line edge may be adjusted so that the phase may be adjusted.

As in the prior art, all components had to be disassembled and refitted for re-adjustment, and then reassembled. However, in the present invention, the phase is changed by varying the length of the transmission line by turning another housing that is screwed into one housing. As an adjustment, it is very advantageous that the phase can be precisely adjusted simply by rotating the housing. That is, the overall length of the coaxial cable can be easily adjusted to the desired phase by the adjusted length accordingly, so that workability and productivity and precision can be efficiently increased.

Hereinafter, a precision phase control apparatus for a high frequency transmission line according to the present invention will be described with reference to the accompanying drawings.

FIG. 2 is divided into high frequency transmission lines of desired design length, such as the middle of a coaxial cable, according to the present invention, and divided into one of them (hereinafter referred to as a first transmission line element) on the left side of FIG. The other one (hereinafter, referred to as a second transmission line element) is shown on the right side. These two divided parts are now coupled to each other and phase adjusted by the precision phase adjuster according to the present invention so that a high frequency transmission line component capable of delivering a high frequency signal with a desired phase can be provided. The parts joined to the respective coaxial cable parts on the leftmost and rightmost in FIG. 2 are connectors as mentioned in FIG. 1.

Next, the present invention will be better understood by explaining the coaxial cable manufacturing method according to the present invention.

3 shows a socket 6 to be coupled to the first transmission line element 4 and a pin 7 to be coupled to the second transmission line element 5. The socket 6 is configured to receive the pin 7 as described below, which socket 6 can be fastened to the first transmission line element 4, for example by soldering. However, the present invention is not limited thereto, and in some cases, various coupling methods including crimping may be employed. Likewise, the pin 7 can be coupled to the second transmission line element 5. The socket 6 has a portion coupled to the core of the coaxial cable and a portion to which the pin will be accommodated, as shown. The pin 7 likewise has a part to which the core of the coaxial cable is coupled and a part to be inserted into the socket.

These combined states are shown on the left and right in FIG. 4, respectively. Reference numerals S3 and S4 in the drawings are intended to show, for example, to be bonded by soldering according to an embodiment of the present invention, as is not limited to this.

Next, with the first and second transmission line elements 4, 5 coupled to their respective sockets, pins as shown in FIG. 4, each is housed by a respective housing 8, 9.

Shown on the left in FIG. 5 is a cross-sectional view of a housing 8 for a first transmission line element (hereinafter referred to as a first housing), and shown at the right in FIG. 5 is a housing 9 for a second transmission line element ( Hereinafter referred to as a second housing). As shown in FIGS. 5 and 6, the first housing 8 is fitted with an engaging portion 81 for coupling to an end of the first transmission line element 4, surrounding the end of the second transmission line. It has another joining portion 82 which receives it, and a joining portion 83 which runs between these two joining portions 81 and 82, the joining portion 83 enclosing a socket coupled to the coaxial cable core therein. It has an extended length. In addition, the second housing 9 likewise has a coupling portion 91 for coupling to the end of the second transmission line element 5, but the body portion which extends around the pin allows the pin to protrude outward. Have one length. These housings 8, 9 can be fixed at points such as S5 and S6 by respective soldering lines, for example by soldering.

With reference to FIG. 6, the dimension of each component is demonstrated. Since the respective housings 8, 9 must be joined to each other, for example, the inner diameter D2 of the coupling portion 82 for coupling to the end of the second transmission line of the first housing 8 is the outer diameter of the coaxial cable ( It is the same dimension as D2).

In general, RF transmission lines use a predetermined impedance to reduce reflection of signals transmitted between lines. To this end, a typical RF signal may use 50Ω and an image signal may use 75Ω. The impedance of the transmission line with the coaxial structure is determined by the outer diameter of the inner conductor, the inner diameter of the outer conductor and the dielectric constant of the dielectric material therebetween, which can be expressed by the following equation.

Impedance (Ω) = (138 / √εr) log (D / d)

εr: dielectric constant of dielectric

D: inner diameter of outer conductor (D1 and D2 in Fig. 6)

d: outer diameter of inner conductor (d1 and d2 of FIG. 6)

Since the dielectric constant of air is about 1, D / d in the above formula should be 2.3.

Accordingly, the dimensions of each part can be determined as follows.

D1 = d1 x about 2.3

D2 = d2 x about 2.3

In addition, since the socket 6 is a part for accommodating the pin 7, it is preferable that these two parts have a structure in which the two parts can elastically contact each other. Note that RF lines use nonmagnetic materials in nature, so that sockets are generally phosphor bronze and beryllium copper, although other suitable materials are also possible.

In this way the two currently separated first and second transmission line elements are ready to be joined together. These will be combined as described below and as shown in FIG. 7. These two elements are fitted to fit and the two elements can be fastened and fastened with an element such as a nut 10, as shown in FIG. 7 (a).

Next, the phase adjustment will be described with reference to FIGS. 7 and 8.

FIG. 7 shows a cross-sectional view of a state in which the first transmission line element 4 and the second transmission line element 5 are joined by housings. 8 is a cross-sectional view showing that the degree of insertion of the pin into the socket for the phase adjustment in the coupled state is varied.

As shown, the housings 8, 9 are designed to be screwed in engagement with each other. This is to rotate the housings 8, 9 so that the overall length of the coaxial cable can be adjusted as desired. 8 is a cross-sectional view showing a state in which the first and second transmission line elements, which have been divided according to the present invention, are combined, and in this state, the phase of the high frequency signal transmitted through the transmission line may be changed. Show that you are in the womb. If this phase does not represent the desired designed phase, conventionally all components had to be disassembled and re-assembled and reassembled as previously mentioned, but in the present invention a second screwed fitting to the first housing is required. The phase is adjusted by turning the housing to vary the length of L1 and L2. This is very advantageous because the phase can be precisely adjusted simply by rotating the housing. L1 refers to the length from the edge of the socket to the edge of the second coaxial cable. Then by rotating the second housing clockwise or counterclockwise relative to the first housing, the length L1 can be reduced to the length L2 and vice versa. Accordingly, the total length of the coaxial cable is adjusted accordingly by the adjusted length, so that the desired phase can be easily matched. After precisely fitting in this way, it is fixed by the nut 10 so that it can no longer be rotated.

1 is a process flow diagram for manufacturing a conventional transmission line.

2 is a cross-sectional view illustrating two divided transmission line elements according to the present invention;

3 is a cross-sectional view of the socket and the pin according to the present invention.

4 is a cross-sectional view showing the components of FIG. 3 coupled to each transmission line.

5 is a cross-sectional view of the housings according to the invention.

6 is a cross-sectional view showing the housings of FIG. 5 coupled to each transmission line.

7 is a cross-sectional view of a transmission line to which the phase adjusting device according to the present invention is applied.

8 is a cross-sectional view illustrating a method of adjusting the phase by the phase adjusting device according to the present invention.

** Description of the symbols for the main parts of the drawings **

4, 5; Transmission line

6; socket

7; pin

8, 9; housing

10; nut

Claims (6)

In a phase adjusting apparatus of a high frequency transmission line of a suitable length for transmitting a high frequency signal having a desired phase, A plurality of transmission line elements comprising at least first and second transmission lines dividing the high frequency transmission line of the length; A socket coupled to the end of the first transmission line element, and a pin coupled to the end of the second transmission line element fitted in the socket; A first housing having a joint portion surrounding the socket and an extension portion thereof, the coupling portion to which an end portion of the second transmission line is fitted, and having a screw groove formed therein; A second housing having a threaded groove formed therein so as to surround an end of the second transmission line therein and protrude the pin to the outside; The first housing and the second housing are coupled to each other by screwing so that the pins fit into the sockets; The phase adjusting device of the high frequency transmission line to adjust the phase by adjusting the distance between the socket edge and the second transmission line edge by the screwed degree. The method of claim 1, Impedance (Ω) = (138 / √εr) log (D / d) εr: dielectric constant of dielectric D: inner diameter of outer conductor (D1 and D2) d: outer diameter of inner conductor (d1 and d2) According to the relationship, in the case of a 50 Ω line, D / d is set to about 2.3. The apparatus of claim 1, wherein the high frequency transmission line is a coaxial cable. The apparatus of claim 1, wherein the coupling of the first housing to the first transmission line and the coupling of the second housing to the second transmission line are coupled and fixed by soldering. The phase adjusting apparatus of claim 1, further comprising a coupling member for fixing the coupling of the first housing and the second housing. The phase adjusting apparatus of claim 1, wherein the socket and the pin are made of a nonmagnetic material.
KR1020080137812A 2008-12-31 2008-12-31 Phase adjustment device for use in radio frequency transmission lines KR20100079358A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080137812A KR20100079358A (en) 2008-12-31 2008-12-31 Phase adjustment device for use in radio frequency transmission lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080137812A KR20100079358A (en) 2008-12-31 2008-12-31 Phase adjustment device for use in radio frequency transmission lines

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KR20100079358A true KR20100079358A (en) 2010-07-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9287927B2 (en) 2013-07-03 2016-03-15 Infinet Technology Ltd. Cable assembly and signal transmission system using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9287927B2 (en) 2013-07-03 2016-03-15 Infinet Technology Ltd. Cable assembly and signal transmission system using the same

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