JP3067680B2 - Impedance matching connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for connecting printed circuit boards arranged in a direction orthogonal to each other, and more particularly to an impedance matching connector suitable for transmitting high-frequency signals.

[0002]

2. Description of the Related Art A conventional connector disclosed in Japanese Patent Application Laid-Open No. 7-6824 will be described with reference to FIG. FIG. 5 is a sectional view showing a connector disclosed in Japanese Patent Application Laid-Open No. 7-6824. As shown in FIG.
Is fitted over three segments 512, 513, 514, and further three segments 512, 513, 5
14 is provided with a slit 518 sandwiching a spring contact 516, and a conductive shielding member 519 is provided in the slit 518.
And the coaxial structure of the spring contact 516 and the shielding member 519 sandwiching the spring contact 516 inside and outside enables optimization of impedance within a certain limit.

As shown in FIG. 6, a connector disclosed in Japanese Patent Application No. 8-200655 has a partition wall 605 integrated with a housing 608 at a lead portion of the connector. Is applied to form a metal plating film 615, and a microstrip line is formed between the metal plating film 615 and the terminal 609. In the structure shown in FIG. 6, it is possible to obtain an appropriate impedance by designing in advance in consideration of the distance between the partition 605 and the terminal 609 and the dielectric constant of the partition 605.

[0004]

However, in the impedance matching connector shown in FIGS. 5 and 6, the material is determined by the dielectric constant of the housing material at the design stage, and the impedance between the signal terminal and the ground terminal is determined. Therefore, there is a problem that the impedance cannot be freely changed after completion as a connector.

It is an object of the present invention to provide an impedance matching connector which can be changed to a desired impedance before or after the connector is completed.

[0006]

To achieve the above object, an impedance matching connector according to the present invention is an impedance matching connector having a connector body and a spacer, wherein the connector body has a signal terminal, a ground terminal, The signal terminal and the ground terminal are
It constitutes a strip line, and the spacer is
A dielectric, the connector body after the substrate mounting, by exchanging different spacer dielectric constant between the signal and ground terminals of the stripline impedance
Can be adjusted .

The strip line composed of the signal terminal and the ground terminal is such that the signal terminal and the ground terminal are alternately arranged in the row direction and arranged in a matrix.

The signal terminals arranged in the row direction are electromagnetically shielded from each other.

The ground terminal has a size that is larger than the signal terminal in the column direction, and the ground terminal electromagnetically shields the signal terminals in the row direction.

The spacers having different dielectric constants have a comb shape and have different dielectric constants by changing the thickness of teeth inserted between the signal terminal and the ground terminal.

Further different spacer of the dielectric constant are those having a dielectric constant with different dielectric constants with different materials.

[0012]

According to the present invention, the impedance matching spacer is exchangeably mounted on the connector body. The impedance matching spacer has variously changed the elements that change the impedance by changing the thickness dimension of the tooth inserted between the signal terminal and the ground terminal of the strip line or using a material having a different dielectric constant. Prepare things in advance,
By selecting a spacer that matches the desired impedance from among them and attaching it to the connector body,
Match the desired impedance.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an impedance matching connector according to an embodiment of the present invention, FIG. 2 is an exploded view showing a state in which a connector main body and a spacer are separated in the embodiment of the present invention, and FIGS. FIG. 3 is a configuration diagram illustrating an operation according to the exemplary embodiment of the present invention.

In the figure, an impedance matching connector according to an embodiment of the present invention is a combination of a connector main body 1 and a spacer 4.

The connector main body 1 is a set of a male side and a female side. In the embodiment of FIG. 1, only one connector main body 1 is shown, and in the embodiment of FIG. The description will be made by taking an example of an L-shaped structure in which the connection ports of the signal terminal 3 and the ground terminal 5 of the connector body 1 are oriented at right angles.

The connector body 1 has a signal terminal 3 and a ground terminal 5, and the signal terminal 3 and the ground terminal 5 constitute a strip line. Each of the signal terminal 3 and the ground terminal 5 has a spring contact B at one end, and has an insertion pin P at the other end.
The spring contact B is held by the housing 2 of the connector main body 1, and the insertion pin P side is bent at a right angle and arranged in a direction orthogonal to the spring contact B.

A strip line composed of a set of the signal terminal 3 and the ground terminal 5, as shown in FIGS.
The signal terminals 3 and the ground terminals 5 are alternately arranged in the row direction and arranged in a matrix. The signal terminals arranged in the row direction are electromagnetically shielded. Specifically, the size of the ground terminal 5 is extended in the column direction from the signal terminal 3, and the signal terminal 3 in the adjacent row direction is electromagnetically shielded by the enlarged ground terminal 5.

The spacer 4 is made of a dielectric material and is replaceably mounted in a gap between the signal terminal 3 and the ground terminal 5 of the strip line. Specifically, the spacer 4 has a comb-like shape, and a slit 6 is provided between the signal terminal 3 and the ground terminal 5 of the strip line. It is attached so that it can be pulled out.

The spacer 4 has a comb-like structure provided with teeth inserted into a slit 6 between the signal terminal 3 and the ground terminal 4. The spacer 4
By changing the thickness of the comb-shaped teeth to make the permittivity different, or by using a material having a different permittivity to make the permittivity different, prepare in advance various elements for changing the impedance changing element. In addition, by selecting a spacer suitable for a desired impedance from among them and attaching it to the connector body, the impedance is matched to the desired impedance.
Even after mounting on the board, the impedance matching spacer 4 can be replaced.

The ground terminals 5 are sufficiently wide in the column direction, so that the signal terminals 3 can be shielded and the signal terminals 3, 3 in the row direction can be electromagnetically shielded from each other. Since the ground terminal 5 and the signal terminal 3 face each other with the dielectric spacer 4 interposed therebetween, the ground terminal 5 constitutes a strip line, and the impedance can be matched.

In the body of the single connector 1, the impedance of the lead portion of the signal terminal 3 and the ground terminal 5 protruding from the housing 2 is about 100Ω when the shape and dimensions are as shown in FIG.

If the impedance of the circuit using the connector is 100Ω, the connector shown in FIG. 3 can be used as it is, but if the circuit impedance is 75Ω or 50Ω, some measures must be taken to match the impedance. Need to be taken. Therefore,
By attaching the impedance matching spacer 4 to the connector body 1, the impedance is matched. The impedance matching spacer 4 is not one kind, but several kinds of materials having the same structure as described above in which the thickness of the comb teeth inserted into the slit 6 are changed are prepared, and the impedance matching spacer 4 is replaced. Perform impedance matching.

FIG. 4 shows an example of the impedance matching spacer 4. As shown in FIG. 4, when matching the impedance, the comb teeth of the impedance matching spacer 4 are inserted into the slits 6 of the connector body 1 without the impedance matching spacer 4 shown in FIG. Assuming that the thickness of the comb teeth of the impedance matching spacer 4 is 0.6 mm and the dielectric constant is 4.2, the impedance of the signal terminal 3 becomes 79Ω by inserting the impedance matching spacer 4, and the impedance is changed by about 20Ω. It becomes possible.

In the illustrated embodiment, the L-shaped structure in which the connection ports of the signal terminal 3 and the ground terminal 5 of the connector body 1 are oriented at right angles has been described as an example. However, the present invention is limited to this structure. Not something.

[0025]

As described above, according to the present invention, since the spacer made of a dielectric material is exchangeably mounted between the signal terminal and the ground terminal of the strip line, the impedance is adjusted after mounting on the substrate. It can be used for, for example, circuits of 50Ω system and 75Ω system having different impedances by absorbing the fluctuation of the impedance of the circuit on the board or replacing the impedance matching spacer for the same connector.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional configuration diagram illustrating an impedance matching connector according to an embodiment of the present invention.

FIG. 2 is an exploded view in which a connector main body and a spacer are separated in the impedance matching connector according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which no spacer is attached to the connector main body in the impedance matching connector according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a state in which a spacer is attached to the connector main body in the impedance matching connector according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a conventional connector disclosed in Japanese Patent Application Laid-Open No. 7-6824.

FIG. 6 is a perspective view showing a conventional connector disclosed in Japanese Patent Application No. 8-200655.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connector main body 2 Housing 3 Signal terminal 4 Impedance matching spacer 5 Ground terminal 6 Slit

Claims (6)

(57) [Claims] 1. An impedance matching connector having a connector main body and a spacer, wherein the connector main body includes a signal terminal and a ground terminal, and the signal terminal and the ground terminal constitute a strip line. The spacer is made of dielectric material, and the connector body is mounted on the board
Later, by replacing the spacer between the signal terminal of the strip line and the ground terminal with a spacer with a different dielectric constant
An impedance matching connector characterized in that the impedance can be adjusted . 2. The strip line comprising a signal terminal and a ground terminal, wherein the signal terminal and the ground terminal are alternately arranged in a row direction and arranged in a matrix. The described impedance matching connector. 3. The impedance matching connector according to claim 2, wherein the signal terminals arranged in the row direction are electromagnetically shielded. 4. The method according to claim 1, wherein the size of the ground terminal is larger than that of the signal terminal in the column direction, and the ground terminal electromagnetically shields the signal terminals in the row direction. The impedance matching connector according to claim 3, wherein: 5. The spacer having a different permittivity has a comb-like shape, and has a different permittivity by changing a thickness dimension of a tooth inserted between a signal terminal and a ground terminal. The impedance matching connector according to claim 1 or 2, wherein: 6. The impedance matching connector according to claim 1, wherein the spacers having different dielectric constants have different dielectric constants using materials having different dielectric constants.