JPS6232581B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for connecting a coaxial line using a connector that enables connection using a general connector provided with a large number of connection terminals without using a dedicated coaxial connector as a coaxial line connector. This is related.

Conventionally, coaxial cables used in transmission lines for high-frequency circuits in the shortwave band and above, and special coaxial connectors used to connect them, consist of a plug and a jack. All coaxial connectors are soldered to the center conductor and outer conductor of the coaxial cable, respectively. It consists of a concentrically insulated center contact and a cylindrical outer contact that are attached or clamped together, one of which is female and the other male which is connected by fitting. The outer peripheries of the plug side and the jack side are removably connected by a screw mechanism or a push mechanism.

However, this type of coaxial connector requires precise machining of both the metal parts and the insulator in order to fit the concentric center contact and the external contact, and the metal parts are plated with gold or silver on the entire surface. Not only that, but compared to other types of connectors, such as rectangular connectors, demand was small, so they were not produced in large quantities and were expensive.

In view of the above-mentioned conventional problems, an object of the present invention is to provide a connection in which an inexpensive connector for low frequency circuits, for example, can be used as a connector for a coaxial line, and the coupling loss can be made almost equal to that of a dedicated coaxial connector. The purpose is to provide a method.

In order to achieve this object, the method of the present invention connects a center line of a coaxial line to one terminal of the connection terminal in a connector in which a large number of square or blade-shaped connection terminals are arranged in parallel, and connects the center line. This is a method of connecting the coaxial line and the connector by connecting the external line of the coaxial line to a plurality of terminals so as to substantially surround the terminals. The method of the present invention will be explained in detail below with reference to the illustrated embodiments.

FIG. 1 is a perspective view showing an embodiment of the connection method of the present invention.

In the same figure, 1 and 2 are conductors 1 ₁ and 2 ₁ of the center line, respectively, and a conductor 1 of a concentric external line insulated with cross-linked polyethylene on the outer periphery.
This is a well-known high frequency coaxial cable consisting of _2.2 and _2.2 . Reference numeral 3 designates a part on the plug side of the rectangular connector having a large number of protruding contact pieces 3', and numeral 4 represents a part of the jack side of the rectangular connector having the contact piece 4' into which the contact pieces 3' are inserted and connected. The plug-side connector 3 includes terminals 31, 32, 33, 34, etc. that are integrated with the contact pieces 3' arranged in two rows, and terminals 31', 32', 33', 34', etc. arranged in parallel with the contact pieces 3'. It stands out. In this embodiment, the terminal 32 and the center conductor 1
₁ , and the terminals 31 and 33 on both sides of the terminal 32 and the terminals 31', 32', and 33' arranged in parallel are connected to a plurality of locations of the external conductor _12, respectively. Similarly, the terminal 42 corresponding to the terminal 32 of the jack side connector 4 is connected to the center conductor ₂₁ , and the terminals 41, 43 are connected to the center conductor 21.
(not shown) 41', 42', 43' as outer conductor ₂
Connect to.

In this way, the terminals of the square connector are arranged,
By connecting the center conductor and outer conductor of the coaxial cable in a similar manner as possible, that is, by essentially surrounding the center line with the outer line, the impedance unevenness of this connection circuit is reduced and the reflection is reflected. It is possible to suppress the generation of waves, etc., and to suppress coupling loss as small as possible.

2A and 2B respectively show connection circuits of other embodiments of the method of the present invention.

51, 52, 53, ..., 51', 52',
Connect the terminal 52' of 53'... to the center conductor P ₁ of the coaxial cable.
Terminals 51' and 53' on both sides of terminal 52' and the opposing terminal 52 are respectively connected to the outer conductor _P2 of the coaxial cable. This connection method has almost the same coupling loss as that shown in FIG.

Figure 2 (b) shows a connection method in which two pairs of coaxial cables are connected using one rectangular connector, and terminal rows 51, 52, 53, 54..., 51', 5 are arranged in two rows.
Connect the terminals 52 of 2', 53', 54'... to the center conductor _P1 of one coaxial cable, and connect the terminals 51, 53, 5
1', 52', 53' to the outer conductor P ₂ of the same coaxial cable, and the center conductor P ₁ ' and terminal 56' of another coaxial cable, and the outer conductor P ₂ ' and terminals 55', 57', 5
5, 56, and 57 are connected to each other.

Such a connection method is cheaper than the conventional method of using two coaxial connectors, and allows coaxial cables to be connected in a removable manner.

FIG. 3 shows the frequency characteristics of the coupling loss of the connection method of the present invention.

In the same figure, C shows the relationship between coupling loss and frequency when one terminal of a rectangular connector is simply connected to the center conductor of a coaxial cable, and one terminal installed in parallel is simply connected to the outer conductor, as shown in A. FIG. 3D is a diagram showing the relationship between coupling loss and frequency when using the connection method according to an embodiment of the present invention, as shown in FIG. In both C and D, the vertical axis shows the coupling loss, and the horizontal axis shows the frequency.

C has coupling loss between frequencies 1MHz and 100MHz.
It shows that the coupling loss hardly changes at L ₁ , but increases rapidly when it exceeds 100 MHz, but in D, it extends between 1 MHz and 1000 MHz and beyond, and the coupling loss remains almost unchanged at L ₂ . In this case, it goes without saying that L ₁ ≧L ₂ .

Although the illustrated embodiment has been described with respect to a rectangular connector, similar effects can be obtained with a round connector.

As explained above, the method of the present invention is a coaxial line connecting method of a connector that uses an inexpensive connector and exhibits almost the same performance as an expensive high frequency coaxial connector, and has excellent practical effects.

[Brief explanation of the drawing]

Figure 1 is a perspective view of one embodiment of the method of the present invention, Figure 2 A and B are connection circuits of another embodiment, Figure 3 A and B are connection diagrams, and C and D are respectively FIG. 3 is an explanatory diagram of frequency characteristics of coupling loss. In the figure, 1 and 2 are coaxial cables, 1 ₁ and 2 ₁ are center conductors, 1 ₂ and 2 ₂ are outer conductors, 3 is the plug side of the connector, 4 is the jack side of the connector, 31, 3
2,...,31',32'...,41,42,...4
1', 42',..., 51, 52,..., 51', 5
2'...respectively indicate the terminals of the connector.

Claims (1)

[Claims] 1. In a connector in which a large number of connection terminals are arranged in parallel, a center line of a coaxial line is connected to one terminal of the connection terminal, and a plurality of terminals are connected to each other so as to substantially surround the connected terminal of the center line. A method for connecting a coaxial line using a connector, which connects an external line of the coaxial line and connects the coaxial line and the connector.