KR101759286B1

KR101759286B1 - Transition waveguide and transition element

Info

Publication number: KR101759286B1
Application number: KR1020150092861A
Authority: KR
Inventors: 임동연; 조인호; 서인종; 김영명
Original assignee: 주식회사 에이스테크놀로지
Priority date: 2015-06-30
Filing date: 2015-06-30
Publication date: 2017-07-18
Also published as: KR20170002920A

Abstract

A transition waveguide and transition member for transmitting a signal transmitted through a waveguide to a substrate is disclosed. According to an aspect of the present invention, there is provided a transition waveguide including a waveguide body defining an inner space opened to one side and a transition member located at an open side of the inner space. Here, the transition member includes a ridge portion protruding into the inner space and a connecting portion protruding outward from the ridge portion toward the outside. One embodiment of the present invention provides the advantage of not only reducing labor and cost for manufacturing but also improving the performance of the final product.

Description

[0001] TRANSITION WAVEGUIDE AND TRANSITION ELEMENT [0002]

The present invention relates to a transition waveguide and a transition member, and more particularly, to a transition waveguide and a transition member for transmitting a signal transmitted through a waveguide to a substrate.

Microwaves are very short wavelengths and have characteristics similar to those of light, which is advantageous for multiple communications, and even a small output can be used for long-range communications, such as TVs and telephones.

A waveguide can be used as a microwave transmission line. A waveguide has advantages such as resistance loss caused by a conductor, loss of radio wave energy during propagation, loss of dielectric loss, no radiation loss, and large power to be handled have. A transition is required to transmit a signal transmitted through an inner space formed in the waveguide to a transmission medium such as a strip line or a coaxial cable formed on the substrate, and a separate transition member can be used for this purpose.

FIG. 1 is a perspective view conceptually showing a transition configuration for signal transmission between a waveguide and a substrate according to the related art. Referring to FIG.

A conventional transducer 10 for signal transmission between a waveguide and a coaxial cable may be located between the waveguide 20 and the substrate 30 connected thereto and may use impedance matching to prevent loss due to reflected waves during signal transmission. A bead 11 and a ridge 12 may be used.

The inner diameter of the bead 11 is connected to the line of the substrate 30 and the outer diameter of the bead 11 is larger than the outer diameter of the housing 13, So that the bead 11 is fixed to the housing 13. The bead 11 is fixed to the housing 13 by soldering. The ridge 12 is connected to the bead 11 and inserted into the waveguide 20 where the ridge 12 and the bead 11 are soldered and connected.

As a result, the conventional transition device 10 additionally includes a soldering process for fixing the bead 11 to the housing 13 and a soldering process for connecting the bead 11 and the ridge 12, which are separate components, There are disadvantages. This increases the manufacturing cost of the structure to which the transition device 10 and the waveguide 20 are applied.

Further, since the bead 11 and the ridge 12, which are separate components, are connected by the soldering process, not only the mechanical tolerance is increased but also the impedance matching becomes unstable.

Accordingly, there is a need for a method that can simplify the parts used and remove the additional process such as soldering to efficiently provide a transition.

SUMMARY OF THE INVENTION An aspect of the present invention is to solve the problems of the prior art described above and to provide a method for reducing the number of parts used for transition between a waveguide and a substrate.

It is also intended to provide a way to reduce the cost and implement the transition efficiently by eliminating additional processes such as soldering.

According to an aspect of the present invention, there is provided a transition waveguide including a waveguide body defining an inner space opened to one side and a transition member located at an open side of the inner space. Here, the transition member includes a ridge portion protruding into the inner space and a connecting portion protruding outward from the ridge portion toward the outside.

The ridge portion may comprise a plurality of jaws located at different heights and having step differences.

The length of the protrusion of the connection portion outside the inner space can be set to be equal to or greater than the thickness of the substrate connected to the transition member.

The transition waveguide according to an embodiment of the present invention may further include a substrate connected to the transition member. In this case, the substrate may be provided with a through hole having an inner diameter corresponding to the diameter of the connecting portion, and the connecting portion may be inserted into the through hole.

A grounding member may be formed on one surface of the substrate facing the waveguide body, and a strip line may be formed on the other surface of the substrate opposite to the one surface. The connection portion may be electrically connected to the strip line through the through hole. An insulating layer coated with an insulating material may be formed on a part of the connection part. Since an insulating layer is not formed on at least a part of the end of the connection part, the connection part is not electrically connected to the other surface of the substrate, So that an electrical connection can be made.

According to another aspect of the present invention, there is provided a transition member coupled to a waveguide including an inner space which is opened to one side. The transition member includes a ridge portion that is coupled to the inner space and a connection portion that protrudes outward from the ridge portion toward the outside of the waveguide.

The ridge portion may include an insulating layer composed of an insulating material on at least a part of a surface contacting with the waveguide.

An insulating layer coated with an insulating material may be formed on a part of the connecting portion. Since an insulating layer is not formed at least at a terminal end of the connecting portion, the connecting portion is not electrically connected to the one surface of the substrate, Can be achieved.

The connection portion may be configured to have a diameter corresponding to the inner diameter of the through hole formed in the substrate connected to the transition member.

According to an embodiment of the present invention, a transition member and a transition waveguide capable of directly connecting the waveguide to the substrate are provided. The transition member and the transition waveguide can omit the existing beads and the housing for the same, thereby eliminating the soldering process for connecting the beads, thereby making it possible to efficiently manufacture the transition configuration and to reduce the manufacturing cost Can be saved.

FIG. 1 is a perspective view conceptually showing a transition configuration for signal transmission between a waveguide and a substrate according to the related art. Referring to FIG.
2 is an exploded perspective view conceptually showing a transition waveguide according to an embodiment of the present invention.
3 is a perspective view conceptually showing a transition member according to an embodiment of the present invention.
4 is a perspective view conceptually illustrating a state in which a transition waveguide is coupled to a substrate according to an embodiment of the present invention.
5 is a cross-sectional view conceptually showing a state in which a transition waveguide is coupled to a substrate according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an exploded perspective view conceptually showing a transition waveguide according to an embodiment of the present invention, and FIG. 3 is a perspective view conceptually showing a transition member according to an embodiment of the present invention. FIG. 4 is a perspective view conceptually showing a state in which a transition waveguide according to an embodiment of the present invention is coupled to a substrate, FIG. 5 is a cross-sectional view conceptually showing a state in which a transition waveguide is bonded to a substrate according to an embodiment of the present invention, to be.

As shown, the transition waveguide according to an embodiment of the present invention may include a waveguide body 100, a transition member 200, and a substrate 300.

The waveguide body 100 is made of a conductive material and divides the inner space 140 so that microwaves can be transmitted. The waveguide body 100 may be open to both sides as shown.

The waveguide body 100 may have flanges 110 and 130 formed on both sides thereof. Flanges 110 and 130 may facilitate coupling waveguide body 100 to other components.

The transition member 200 may be located at an open side of the inner space 140. The transition member 200 may include a ridge portion 210 and a connection portion 230, which may be integrally made of the same material.

The ridge portion 210 may be located in the inner space. That is, in the transition waveguide including the ridge portion 210, the ridge portion 210 may be seen to protrude inwardly of the inner space. As shown in FIGS. 2 and 3, the ridge portion 210 may form a plurality of stepped steps formed at different heights. The ridge part 210 having such a configuration allows the microwave signal transmitted through the inner space 140 of the wave guide body 100 to be transmitted to a medium such as a wire made of a conductive material.

Although not shown, an insulating layer (not shown) may be formed on at least a portion of the region where the ridge portion 210 contacts the waveguide body 100. This is because the waveguide main body 100 basically maintains the ground potential.

The connection part 230 may be formed to extend from the ridge part 210 as shown in FIG. The connection unit 230 may transmit the signal transmitted to the ridge unit 210 to the substrate 300.

The connection part 230 may be configured to protrude out of the inner space 140 in a state where the transition member 200 is mounted in the inner space 140 of the waveguide body 100. [

The length of the connection part 230 protruding out of the inner space is set to be equal to or greater than the thickness of the substrate 300 so that the connection part 230 is formed on the other surface of the substrate 300, And may be set to a length that can be connected to the opposite side of one surface of the waveguide body 100 facing the waveguide body 100. The connection part 230 may be connected to the connection part 230 and the substrate 300 without being excessively protruded from the other surface of the substrate 300 as shown in FIG. 5, if the length of the connection part 230 is substantially the same as the thickness of the substrate 300. [ 300 can be made in the same plane.

The diameter of the connection portion 230 may be set to a size corresponding to the inner diameter of the through hole 320 through which the connection portion 230 is inserted in the substrate 300. In an embodiment of the present invention, the diameter of the connection portion 230 is substantially equal to the inner diameter of the through hole 320, so that stable mechanical and electrical coupling can be achieved.

The substrate 300 may be coupled to the waveguide body 100. The substrate 300 may be, for example, a printed circuit board (PCB), and may include circuit lines and various elements on one or both sides. In particular, a grounding member such as a ground plane may be formed on one surface of the substrate 300, and a strip line 340 may be formed on the other surface of the substrate 300. The strip line 340 is connected to the through hole 320.

When the waveguide main body 100 in which the transition member 200 is mounted at a predetermined position by the bolts 220 is coupled to one surface of the substrate 300, the connection portion 230 of the transition member 200 is inserted into the through hole 320 The connection part 230 may be exposed to the other surface of the substrate 300 through the through hole 320. In this case, The end of the connection part 230 is electrically connected to the strip line 340 at the other side of the substrate 300.

The strip line 340 on the other side of the substrate 300 can transmit the input signal together with the grounding member on one side of the substrate 300. [

Although not shown, the connection part 230 is electrically connected to the other surface of the substrate 300 without being electrically connected to the one surface of the substrate 300, as described above. Therefore, It is possible to prevent electrical contact from occurring in a portion where electrical contact is undesirable.

For example, an insulating layer may be formed on the outer circumferential surface of the connection portion 230 adjacent to the ridge portion 210 to prevent electrical connection from being made in a portion of the substrate 300 facing the waveguide body 100, An insulating layer may not be formed at the end of the connection part 230 contacting the other surface of the substrate 300 so that the connection part 230 makes an electrical contact with the strip line 340 on the other surface of the substrate 300.

The insulating layer may be formed by applying or bonding a separate insulating material to the connection portion 230 or the like. The through holes 320 of the substrate 300 may be formed taking into account the space for the insulating layer. That is, the through hole 320 may have a different inner diameter at the portion where the insulating layer is formed in the connecting portion 230 and at the portion where the insulating layer is not formed.

In the figures, a connector 400 for a coaxial cable is coupled to the substrate 300 and a signal applied to the strip line 340 is connected to the connector 400 so as to be transmitted to the coaxial cable corresponding to the connector 400 An example is shown, but the present invention is not limited thereto.

Connector 400 is only one example of the various components that may be coupled or mounted to substrate 300. For example, in another embodiment, not shown, a strip line 340 may be coupled to the circuit board 300 to analyze the signal.

According to an embodiment of the present invention, a transition member 200 instead of the bead 11 and the housing 13 which have been used in the past, and a transition waveguide including the transition member 200 are provided. The structure for transition between the waveguide and the substrate can be realized with a remarkably small size because the components such as the bead 11 and the housing 13 can be omitted and the soldering between the bead 11 and the ridge 12 And the soldering process between the bead 11 and the housing 13 may be omitted.

The omission of the parts and the omission of the soldering process means that the tolerance due to the coupling between the parts is remarkably reduced. This is related to the increase in precision in the RF equipment and the like in which the waveguide is used. The resulting transition waveguide is a factor that improves the overall performance of the RF equipment used.

As described above, the transition member and the transition waveguide according to an embodiment of the present invention have the advantage of not only reducing labor and cost for manufacturing, but also improving the performance of the final product.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- Those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the scope of the present invention. Therefore, the spirit of the present invention should not be construed as being limited to the embodiments described above, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention.

100: waveguide body 140: inner space
200: transition member 300: substrate

Claims

A waveguide body for partitioning an inner space opened to one side; And
And a transition member located on one side of the open space of the internal space,
The transition member includes a ridge portion projecting into the internal space,
And a connection portion protruding outward from the ridge portion toward the outside of the inner space,
And a substrate connected to the transition member, wherein the substrate has a through hole having an inner diameter corresponding to the diameter of the connection portion, the connection portion is inserted into the through hole, and the waveguide main body A strip line is formed on the other surface of the substrate opposite to the one surface, the connection portion is electrically connected to the strip line through the through hole,
Wherein an insulating layer coated with an insulating material is formed on a part of the connecting portion, an insulating layer is not formed on at least a part of the end of the connecting portion, and the connecting portion is not electrically connected to one surface of the substrate, And an electric connection is made between the two electrodes,
Wherein the ridge portion and the connection portion are integrally formed of the same material.

The method according to claim 1,
Wherein the ridge portion comprises a plurality of jaws located at different heights and having step differences.

The method according to claim 1,
Wherein a length of the connection portion protruding from the inner space is equal to or greater than a thickness of the substrate connected to the transition member.

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