JPH0438576Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to an electromagnetic delay line formed by connecting an inductance element and a capacitor in the form of a ladder.In particular, the invention relates to an electromagnetic delay line that is suitable for ultra-high-speed signals with a rise time of 1 ns or less. Concerning line improvement.

[Conventional technology]

As this type of electromagnetic delay line, a configuration as shown in FIG. 7, for example, has been proposed.

That is, in the case of a flat and elongated plate-shaped bobbin 1, concave winding grooves 7 and 9 are formed on both end surfaces 3 and 5, which are narrow and extend in the longitudinal direction of the bobbin 1, at a pitch _P1.
Moreover, the winding grooves 7 and 9 are formed so as to be aligned with each other, and a plurality of turns of the conducting wire are wound around the outer periphery of the bobbin 1 through a pair of opposing winding grooves 7 and 9 to form the coil 11 for one section.
At the same time, these coils 11 are connected in series to form an inductance element 13, and the lead transferred from one coil 11 to the next coil 11 is twisted and led out to one end face 3 side as an intermediate lead 15.
Leads 17 and 19 on each side of the coils 11 on both sides are similarly led out to the end surface 3 side as input/output leads.

Then, these input/output leads 17, 19 and intermediate lead 15 are connected to a relay electrode 23 formed on a relay board 21, and a ground electrode 27 is provided on one entire surface of the elongated dielectric layer 25, and a plurality of capacitor electrodes 2 are provided on the opposite surface.
The capacitor electrode 29 of the composite capacitor 31 formed with the reference numeral 9 is connected to the relay electrode 23.

7 are external connection terminals, and FIG. 8 is a perspective view showing the bobbin 1 of FIG. 7.

Such an electromagnetic delay line can be made small and high-speed, and has good productivity to some extent.
Furthermore, the characteristics of this electromagnetic delay line are mainly determined by the inductance element 13, but since the coils 11 in each section are positioned by the winding grooves 7 and 9, the pitch between each coil 11 and each winding width are is constant and variations in characteristics are less likely to occur.

[Problem that the invention attempts to solve]

In such an electromagnetic delay line, if it is necessary to further increase the speed while keeping the overall dimensions and delay time substantially the same, this is often achieved by increasing the number of sections.

For example, if the 5 section configuration in Figure 7 mentioned above is
To create a 10-section configuration, inductance element 13
Alternatively, the number of coils 11 may be approximately doubled from 5 to 10, and the number of capacitive electrodes 29 of the composite capacitor 31 may be approximately doubled from 6 to 11 while keeping the overall dimensions of the composite capacitor 31 approximately the same.

Since the overall inductance value of the inductance element 13 and the overall capacitance value of the composite capacitor 31 are not changed, each coil 11
It is necessary to halve the value per capacitor electrode 29, and when increasing the number of sections, high dimensional precision is required for the inductance element 13 and the composite capacitor 31.

However, the composite capacitor 31 is generally made by printing and firing the capacitive electrode 29 on a large ceramic plate and then cutting it, and the printing accuracy of the capacitive electrode 29 is not sufficient with the current technology. can get.

Also, regarding the inductance element 13, for example, the bobbin 1 in FIG. 7 is as shown in FIG.
The winding width of the coil 11 when the coil 11 is wound is
W ₁ , the winding width is B ₁ , and the winding spacing is A ₁ in 5 sections. If the winding width W ₂ of the coil 11 is approximately the same as W 1 or slightly different from W ₁ as shown in FIG. If a bobbin 1a with a large pitch P ₂ , winding width B ₂ , and winding interval A ₂ of approximately 1/2 of P ₁ , B ₁ , and A ₁ is obtained, the coil 11a is wound around that bobbin 1a. This is easy, and the number of coils 11a can be easily increased.

However, if the bobbins 1 and 1a forming the inductance element 13 are produced by press processing from a material with low high frequency loss and low dielectric constant, such as glass fiber-containing fluororesin laminate, for example,
It is thought that a uniform product can be obtained at low cost, but it is possible to use a fluorine resin laminate with the same thickness as the bobbin 1, and the winding width W ₂ of the coil 11 is approximately the same as W ₁ .
The winding spacing A ₂ , winding width B ₂ , and pitch P ₂ are A ₁ , B ₁ ,
In order to manufacture a bobbin 1a with approximately 1/2 of P ₁ ,
The shape of the punched part of the press mold becomes small, making manufacturing difficult.

For example, using a glass fiber-containing fluororesin laminate with a thickness of 0.37 mm, W ₁ = 4 mm, A ₁ = 0.4 mm, and B ₁ =
When manufacturing the bobbin 1 as shown in Fig. 9 with 0.8 mm and P ₁ = 1.2 mm by press working, the same fluororesin laminate is used with W ₂ = 4 mm, A ₂ = 0.2 mm, and B ₂ = 0.4 mm. , _P2
= 0.6 mm and the bobbin 1a as shown in FIG. 10 is manufactured by press working, the former can be worked, but the latter is difficult to work.

The reason is that the winding spacing _A2 is 0.2mm.
In addition to being smaller than the 0.37mm thickness of fluorocarbon resin laminates, the presence of glass fibers makes high-precision processing even more difficult.

Further, even if a press mold of such dimensions is formed, the mold is likely to be worn out or damaged, and it is difficult to mass-produce bobbins 1a of a certain size with high accuracy.

As described above, changing the bobbin 1 poses an obstacle when attempting to reduce the size, speed, and cost of the electromagnetic delay line as shown in FIG. 7.

The present invention was developed under these circumstances, and provides an electromagnetic delay line in which the number of sections can be easily increased and the bobbin can be manufactured easily.

[Means for solving problems]

In order to solve these problems, this invention
As shown in FIG. 1, a plurality of first winding grooves 49 are formed at a predetermined pitch along the longitudinal direction on one end surface 45 of the elongated plate-shaped bobbin 39 extending in the longitudinal direction. A plurality of second winding grooves 51 are formed on another opposing end surface 47 at the same pitch in the same longitudinal direction and shifted from the first winding groove 49, and a pair of opposing first and second winding grooves are formed. Grooves 49, 51
The coil 41 for one section is wound around the outer circumference of the bobbin 39 through the first and second winding grooves 49 and 51.
The inductance element 43 is formed by winding a plurality of inductance elements 43 in a series-connected state while making them alternately common, and the input/output leads 59,
61 and intermediate leads 57 connecting adjacent coils are led out in the same direction, and these leads 57, 59, 6
1 and a capacitor 89 connected in a ladder shape.

[Effect]

The electromagnetic delay line configured in this way is connected to the bobbin 3.
Since the first winding groove 49 and the second winding groove 51 of No. 9 are arranged offset, if adjacent coils 41 are wound alternately using the first and second winding grooves 49 and 51 in common,
Inductance element 43 without increasing the winding groove
The number of sections is increased, and winding of the coil 41 is also extremely easy, and there is no need to reduce the interval between winding grooves.

〔Example〕

FIG. 1 is a perspective view showing an embodiment of an electromagnetic delay line according to the present invention.

In the figure, a flat and elongated plate-shaped bobbin 39 is made of an insulating plate such as a glass fiber-containing fluorine resin laminate, and a plurality of coils 41 for one section are connected in series to the bobbin 39, and an inductance element 4 is connected to the bobbin 39.
3 is formed.

That is, as shown in FIG. 2, the bobbin 39 has a concave first winding groove on one of the narrow first and second end surfaces 45 and 47 extending in the longitudinal direction. A plurality of grooves 49 are formed with pitch P ₃ , and a second winding groove 5 is also formed on the other second end surface 47.
1 is formed in multiple pitches _P3 . Note that the first winding grooves 49 at both ends directly face the bobbin end surface that extends orthogonally to the longitudinal direction.

As shown in FIG. 3, the first and second winding grooves 49 and 51 are formed to be shifted from each other by a half pitch P ₃ /2, and the width B ₃ of the first and second winding grooves 49 and 51 is It is wider than the interval A ₃ between adjacent winding grooves 49 or 51.

Therefore, a protrusion 53 is provided protrudingly at a position corresponding to the center of the first winding groove 49 on the second end face 47 side, and a protrusion 53 is provided on the second end face 47 side at a position corresponding to the center of the first winding groove 51 .
A protruding portion 55 is also provided in a protruding position at a position corresponding to the center. Furthermore, because of the relationship B ₃ >A ₃ , the first and second winding grooves 49 and 51 are formed in a positional relationship such that they alternately overlap slightly.

The coils 41 for one section are overlapped with each other.
The conductive wire is formed by winding a plurality of turns around the outer periphery of the bobbin 39 through the first and second winding grooves 49 and 51 of the set, and the coils 41 in adjacent sections alternately pass through the first and second winding grooves. It is wound with 49 and 51 in common.

To explain this point in detail with reference to FIG. 3, the coil 41 and the first and second winding grooves 49, 51 are arranged from the left to
winding grooves 49a, 49b, 49c... and second winding grooves 51a, 51b..., the coil 41a passes through the first and second winding grooves 49a, 51a to the bobbin 3.
9 and the adjacent coils 41b are the first,
The coil 41c is wound through the second winding grooves 49b, 51a, and the coil 41c is wound through the first and second winding grooves 49b, 51a.
b, and so on. In addition, in FIG. 3, for convenience, each of the first and second winding grooves 49, 5 is formed using a thicker wire than the coil 41 in FIG.
Adjacent coils 41 in No. 1 are wound without spacing.

The leads connecting adjacent coils in each coil 41 are twisted to form intermediate leads 57 and led out to the first end surface 45 side of the bobbin 39, as shown in FIG. One lead of each coil 41 at both ends becomes an input/output lead 59, 61, and the same leads are connected to the first lead.
(The illustration in FIG. 3 is omitted.) On one side (top surface in the figure) of the rectangular insulating plate 63,
First relay electrodes 65, 6 as input/output relay electrodes
7 and the plurality of second relay electrodes 69 arranged between these first relay electrodes 65, 67, with one end of these relay electrodes 65, 67, 69 facing one side 71 of the insulating plate 63. They are formed in parallel at intervals to form a relay board 73.

One ends of the first relay electrodes 65 and 67 become wide connection parts 75 and 77, and the inductance element 43
The intermediate lead 57 is connected to the input/output leads 59 and 61 by soldering, and one end of each second relay electrode 69 also forms a wide connection part 79 to which the intermediate lead 57 is connected by soldering. Note that illustration of solder is omitted.

Further, the first relay electrodes 65 and 67 are longer than the second relay electrode 69, and extend in an L-shape to the center of the other side 81 on the opposite side to the one side 71 of the insulating plate 63, as will be described later. They serve as connection portions 83 and 85 for input and output terminals 97 and 99. Reference numeral 87 is a ground side relay electrode.

A composite capacitor 89 is connected to each relay electrode 65 , 67 , 69 of the relay board 73 . As shown in FIG. 4, which is shown upside down from FIG. A capacitor electrode 95 is formed at the same pitch as the relay electrodes 65, 67, and 69, and the capacitor electrode 95 is fixed to the relay electrode 73 by soldering.

Therefore, the capacitors are connected to the inductance element 43 in a ladder-like manner by the composite capacitor 89, thereby configuring a lumped constant electromagnetic delay line having a plurality of sections.

Connection portions 83 and 85 of first relay electrodes 65 and 67
The input/output terminals 97 and 99 are connected to the ground side relay electrode 8.
A ground terminal 101 is fixed to 7, and a relay board 73
It has been extended from. A connecting piece 103 is connected to the ground electrode 93 of the composite capacitor 89 and the ground side relay electrode 87 .

The electromagnetic delay line configured in this way is connected to the bobbin 3.
9, the first winding groove 49 and the second winding groove 51 are half pitched.
Since they are arranged with a difference of P ₃ /2, it becomes easy to alternately wind adjacent coils 41 using the first and second winding grooves 49 and 51 in common, and the number of sections of the inductance element 43 increases. In addition, the winding groove spacing, ie, the winding spacing _A3 , may remain the same size as in the configuration in which the number of sections is not increased, such as the electromagnetic delay line shown in FIG.

Therefore, the dimensions of the mold for pressing the bobbin 39 are the same as those for molding the bobbin 1 shown in FIG. 7, and the mold is simple and easy to manufacture, with less wear.

Note that the coil 41 in each section is wound at an angle compared to the coil 11 in FIG. 9 described above;
The substantial effect as an electromagnetic delay line is approximately the same as that when the inductance element 13 of FIG. 10 is used.

5 and 6 show the main parts of another embodiment of the electromagnetic delay line of the present invention.

In FIG. 5, the widths of the first and second winding grooves 49 and 51 are increased to increase the overlapping length of the first and second winding grooves 49 and 51, and the coils 41 in each section are arranged in parallel. The inductance elements 43 are arranged in a positional relationship. Note that the connection relationship with the relay electrode 73 and the composite capacitor 89 is the same as that in FIG.

On the other hand, in the configuration shown in FIG. 6, the first and second winding grooves 4
9 and 51 are shifted from each other by a pitch larger or smaller than P ₃ /2. Using the bobbin 39, the coil 4 is
1 is wound to form an inductance element 43. In such a configuration, parallel coils 4
1 and the inclined coil 41 are arranged alternately, but there is no particular change.

In this way, the electromagnetic delay line of the present invention maintains the positional relationship between the first and second winding grooves 49, 51 at P ₃ /2.
It is not limited to the case where the winding grooves are shifted, but the purpose of the present invention can be achieved as long as the winding grooves are shifted, and the pitch at which the windings are shifted, the width of the winding grooves, and the interval between adjacent winding grooves can be arbitrarily selected.

In the inductance element 43 described above, each coil 41 formed on the bobbin 39
The intermediate leads 57 of each coil 41 were led out by twisting them, but the intermediate leads 57 of each coil 41 were led out separately and connected at the connection part 79 of the second relay electrode 69, so that each coil 4
1 can also be connected in series.

Further, the capacitor combined with the inductance element 43 does not have to be the composite capacitor 89, and a chip capacitor may be connected to each relay electrode 65, 67, 69 individually.

Furthermore, although not shown, the insulating plate 63 of the relay electrode 73 is formed of a material having a high dielectric constant, such as ceramic, and the first and second relay electrodes 65, 67, and 69, which are somewhat wide, are formed on one side of the insulating plate 63. By forming ground electrodes facing each other on the other surface of the insulating plate 63, these first and second relay electrodes 6
It is also possible to form capacitors in 5, 67, and 69 themselves to reduce the number of parts.

The electromagnetic delay line of the present invention consists of an inductance element 4
3 is not limited to the configuration in which the inductance element 43 is supported by the relay electrode 73; for example, a configuration in which a capacitor is directly connected to the inductance element 43, or a configuration in which the capacitor is directly connected to the circuit board of an electronic device and mounted directly on the circuit board. A configuration in which a capacitor is connected to a circuit pattern on a circuit board is also possible.

However, as shown in FIG. 1, in an electromagnetic delay line configured by using a relay board 73 and connecting the inductance element 43 to one side 71 of the relay board 73, the lead-out direction of the leads 57, 59, 61 of the inductance element 43 is set to the relay board 73. When facing toward one side 71, the lead 57,
59, 61 and first and second relay electrodes 75, 77,
79 can be connected at once, and input/output terminals 97,
99 and the ground terminal 101 on the other side 8 of the relay board 73.
1, they are connected to the first relay electrodes 75, 7
7 and the ground side relay electrode 87 at the same time.

Therefore, manufacturing is easy and production efficiency is improved, and the structure is a single in-line package type, and it is also easy to form the inductance element 43, the relay board 73, and the composite capacitor 89 thinly, so that the finished product It also becomes flat.

[Effect of idea]

The electromagnetic delay line of the present invention as described above has a flat and elongated bobbin, and the first and second winding grooves are arranged at opposed end faces extending in the longitudinal direction, so that adjacent coils forming an inductance element are arranged. The first and second winding grooves are alternately shared in common, making it easier to wind the bobbin.The number of sections of the inductance element can be increased without increasing the number of winding grooves, and there is no need to narrow the interval between the winding grooves. It is easy to mold and inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the electromagnetic delay line of the present invention, FIG. 2 is a perspective view showing the bobbin of FIG. 1,
FIG. 3 is a partial plan view showing approximately the same inductance element as shown in FIG. 1, FIG. 4 is a perspective view showing the composite capacitor shown in FIG. 1, and FIGS. 5 and 6 are other embodiments of the present invention. FIG. 7 is a perspective view showing an electromagnetic delay line that serves as a reference for the present invention; FIGS. 8 and 9 are a perspective view and a partial plan view showing the bobbin and inductance element in FIG. 7; 10th
This figure is a plan view of essential parts showing a modification of the inductance element shown in FIG. 7. 1, 39... Bobbin, 3, 45... One end surface (first end surface), 5, 47... Other end surface (second end surface), 7, 9... Winding groove, 11, 41... coil,
13...43...Inductance element, 15,5
7... Intermediate lead, 17, 19, 59, 61...
Input/output lead, 21, 73... Relay board, 23,
65, 67, 69... Relay electrode, 25, 91...
Dielectric layer, 27, 93... Ground electrode, 29, 95
...Capacitive electrode, 31, 89... Capacitor (composite capacitor), 49... First winding groove, 51... Second winding groove, 63... Insulating plate.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of first winding grooves are formed at a predetermined pitch along the longitudinal direction on one end surface extending in the longitudinal direction of the elongated plate-shaped bobbin, and are opposed to the end surface. A plurality of second winding grooves are formed along the longitudinal direction on the other end surface of the winding grooves at the same pitch as the pitches, and are arranged to be shifted from the first winding grooves, A plurality of coils for one section are wound around the outer periphery of the bobbin through the first and second winding grooves, and a plurality of coils are connected in series while alternately sharing the first and second winding grooves. An electromagnetic delay characterized in that an inductance element is formed, input/output leads of the inductance element and intermediate leads connecting adjacent coils are each led out in the same direction, and a capacitor is connected to at least the intermediate lead in a ladder shape. line. (2) The electromagnetic delay line according to claim 1, wherein the first and second winding grooves are formed on a narrow end face of the bobbin. (3) The electromagnetic delay line according to claim 1 or 2, wherein the lead and the capacitor are connected via a relay electrode formed on a relay board.