JPS5991718A - Electromagnetic delay line - Google Patents

Abstract

PURPOSE:To obtain an excellent delay characteristic over a broad frequency band by forming an inductance element combined with a capacitor while shifting the winding axis of a coil sequentially in parallel in the same direction. CONSTITUTION:The winding axis of coils 6, 6'- wound around coil bobbins 5, 5'- is provided while being shifted sequentially in parallel in the same direction. The inductance element formed in this way is combined with the capacitor C to form the electromagnetic delay line. The optimum coupling coefficient among the coils 6, 6'- is obtained easily by forming the inductance element in this way and adjusting a distance D and a pitch B among the coils 6, 6'-, allowing to obtain an excellent delay characteristic over a broad frequency band.

Description

[Detailed Description of the Invention] 4' 3+! IJ relates to an electromagnetic delay line that combines an inductance element and a capacitance, especially from low frequencies to several hundred fVfl-
The present invention relates to an electromagnetic delay line that can be used in a wide frequency band up to a high frequency of about 1z and is suitable for delay circuits in color televisions and computers.

Conventionally, this type of electromagnetic delay line consists of: - A plurality of windings rf4 are coaxially formed on a rod-shaped bobbin made of non-magnetic material such as synthetic resin. A coil is sequentially divided into these winding grooves and continuously wound to form an inductance element. It is known to have a structure in which a capacitor is connected between the coil and the ground between adjacent winding grooves.

On the other hand, in another electromagnetic delay line, a plurality of coils constituting an inductance element are each wound around a separate drum-shaped bobbin made of ferrite, and the drum-shaped bobbins around which these coils are wound are spaced at predetermined intervals. Some devices are arranged in such a way that good delay characteristics can be obtained.

However, although an electromagnetic delay line using a rod-shaped bobbin made of a non-magnetic material is easy to assemble and the bobbin's interest cost is low, each coil of the inductance element is in an air-core state and the magnetic flux of the coil is not focused.

Therefore, in order to create optimal coupling between each coil as an electromagnetic delay line and obtain good delay characteristics, it is necessary to widen the spacing between each coil, which increases the length of the bobbin and increases the size of the electromagnetic delay line. There are drawbacks.

In addition, although it is possible to obtain relatively good delay characteristics with electromagnetic delay lines using drum-shaped bobbins, it is difficult to obtain theoretically optimal coupling, and it is difficult to wind the coil around the drum-shaped bobbin. The turning work is complicated, the arrangement of the drum-shaped bobbin and the wiring between the coils are troublesome, and furthermore, since the bobbin is made of ferrite, the material cost of the bobbin is relatively high, leading to an increase in manufacturing cost.

When multiple drum-shaped bobbins are integrated for the purpose of reducing the size of the bobbin, the coupling between coil 17-IJ is too strong and it is not possible to obtain the optimum coupling, and in the end, a bobbin must be prepared for each coil. Therefore, from this point of view as well, it is difficult to reduce the manufacturing cost of the electromagnetic delay line.

The present invention was made in order to solve such conventional drawbacks, and the present invention has been made to solve the conventional drawbacks.
The object of the present invention is to provide an inexpensive, small-sized electromagnetic delay line that has a small coupling of J, allows coils to be placed close to each other, and provides a nearly linear optimum coupling state.

The electromagnetic delay line of the present invention will be explained in detail below.

Before describing one embodiment of the electromagnetic delay line of the present invention, the principles of the present invention will be considered.

First, as shown in FIGS. 1 and 2, a coil bobbin 6 is provided with a rectangular winding groove 7 having a rectangular cross section and a path longer in the Il'lIw direction q' direction than the dimension in the thickness T direction.
Let us consider a coil unit 6 in which a conductive wire is wound around the 50-turn groove 7 of the coil bobbin with m turns per layer, and a coil of 111 m·n turns is wound therein.

This coil unit 6 is connected to the upper and lower IIIM W in FIG.
Focusing on the winding grooves 7 in the direction, each winding groove 7 has an average length W of m.
, a parallel conducting wire group 1.2 consisting of n parallel conducting wires is formed, and the coupling between the individual conducting wires between these parallel conducting wire groups 1.2 varies depending on their distance and takes many slightly different values, but the average If it takes a value, it is coupled by the coupling coefficient KIO.

Similarly, the winding in the left and right thickness T direction in Fig. 2 (:?t 71
f'J] Then, in each winding groove 7, there is a
A parallel conducting wire group 3.4 consisting of 11·n pieces is formed, and the coupling between the individual conducting wires between these parallel conducting wire groups 3.4 varies depending on their distance, but if the average value is taken, the coupling coefficient is - is connected with 30.

The inductance of these parallel conducting wire groups 1.2 is LW1, respectively.
If the inductance of the parallel conducting wire groups 3.4 is LT, then the inductance of the entire coil unit 6 is L-21w (I Klo) +217 (I Ka
o).

As shown in FIG. 3, these coil units 6, 6', 6'', etc. are arranged at intervals in the winding axis direction of the coil, that is, in the X-axis direction in the figure. Coil bobbin (based on Nikoil Uninote 6) 6',
6" are sequentially shifted downward (in the Y-axis direction) in the same figure using pinch B.

In this case, the coupling coefficient a between the coil unit 6 and the coil unit 6' and the coupling coefficient a2 between the coil unit 6 and the coil unit 6'' are, for example, wire diameter 0
．． 07mm conductor wire 01 = 4 turns, n = 32 layers, 128 turns, width +W +-7,6wn.

) Wamigyu Tner 3.1mm coil unit D =
O, when placed 2 spaces apart, the coil unit 6.6'
, and the pinch B that shifts the coil unit 6'', there is a relationship shown in Fig. 4 between the coil unit 6'', J: Since it is close to Mocoil Uninote 6, Hat>a2>0 when pitch B=0.Pitch B
When increasing, al >a2' = 0 and then al
> 0 > a2, and if pitch B is further increased, Q
=a, then 0>al>a2 after passing through a2.The reason why the coupling coefficient 81 changes from a2 to a negative value will be examined in more detail.

In each coil unit 6.6t, 6tt, the mutual coupling between the parallel conducting wire groups 1.1' and 1'' and the mutual coupling between the parallel conducting wire groups 2.2' and 2'' on the width W side are both positive; Parallel conductor group 1, 1', 1'' and parallel groove W 17'p
Any combination of connections between 2.2' and 2'' is negative.

First, considering the relationship between coil units 6 and 6', when pitch B=0, parallel conducting wire groups 1.
1' question and the distance between the parallel conducting wires ffl'2.2' is
Since the distance is shorter than the distance between the row conductor group 1.2' and the parallel conductor group 2.1', which are in a negative coupling state, the positive coupling is stronger than the negative coupling, and the total value of coupling, ie, al, is positive. Become.

When the pitch B increases, the distances between the parallel conducting wire groups 1 and 1', between the parallel conducting wire groups 2 and 2', and between the parallel conducting wire groups 1 and 2' become longer. +' Conductor H
The distance between 'r2·1' becomes shorter and al decreases due to the increase in negative coupling. Therefore, as pitch B increases, a changes from 0 to negative.

On the other hand, the coupling relationship a2 between the coil units 6.6″ is also
Since it can be considered in the same way as the coil unit 6.6' described in 1., al changes from positive to negative through 0. In this case, since the pitch B is further shifted from the coil 22) 6''H:+Ile unit 6', the lower ?j conductor group 2.
111 of the negative coupling contribution between 1" is the flat J conductor IF'
(It is more interesting than the case between '2.1', and when the pitch B changes, al changes to a negative value earlier than al.

In addition, in each coil unit 6, 6', 6'', the parallel conducting wire group 3.4 with thickness T fl+!l does not move in the direction perpendicular to the space between the figures in Fig. 3 (Z-axis direction). ,
City bonds are stronger than negative bonds. Parallel conductor wire 1 on thickness T side
The reason why al and al become negative even if positive bonds of -3 and 4 are included is because the negative bond on the width W side is stronger than the positive bond, and the width W is made smaller than the thickness T. By increasing the length, the positive bond on the thickness T side can be easily canceled out, making it easier to change a, ·al to a negative value.

In this way, by shifting the winding axes of the coils of the coil units 6.6' and 6'' in parallel and sequentially in the same direction, the diameter, width W, thickness T, number of turns 1n, and number of winding layers n of the conductor can be adjusted. Although the degree of change is different, by appropriately selecting the spacing and pitch B, it is possible to change al and al from positive to negative, and in particular, it is possible for al to become negative earlier than al.

In general, the delay characteristics of a delay line are mainly determined by these coupling coefficients 8
1. It is determined by al, and the influence of al is particularly strong.
Assuming that l has a positive sign and there is no value below a2, then
Conventionally, al = 0.142 (equivalent to 1η = 1.34 K for the induced n] type) has been theoretically considered to be the optimum value. However, in practical terms, the existence of a2 or less and the floating volume li [
etc. must be taken into account, and in the end al=01~0
Selected within the range of 2.

On the other hand, theoretically, the ta number of al is negative, and it is preferable to select the absolute value to be about 0.02 to 0.03. By selecting al and al within the above-mentioned optimal ranges, a delay line with good delay characteristics can be obtained.

As a means for determining the optimum values of both the coupling coefficients a1 and a2, the inventors have proposed that J, the coil forming the inductance element as described above, that is, the above-mentioned coil unit,
It has been found that by shifting the winding axes in parallel and in the same direction, it is possible to set a and al by exactly [1] and to select an approximately theoretically appropriate coupling value.

Examples of the electromagnetic delay line according to the present invention will be described below.

FIG. 5 is a diagram showing an embodiment of the electromagnetic delay line of the present invention.

In the figure, each of the coil bobbins 5.5' and 5'' has a winding groove 7 with a rectangular cross section as shown in FIG. The winding shafts are arranged in 11 rows, and the winding shafts are arranged in 11 rows at a predetermined interval and are sequentially shifted in the same direction, for example, downward in FIG. 5 by a pitch B. These coil bobbins 5 .5', 5'' are made of an inexpensive non-magnetic material that is easy to mold, such as synthetic resin, and each flange is formed with a groove (not shown) through which the conductive wire is passed. In addition,
The coil bobbins 5, 5', 5'', . . . may be molded separately and arranged by appropriate means, or may be integrally molded to form four coil bobbins.

In each winding groove of the coil bobbin 6.5', 5'', there is a fill layer forming an inductance element.
i ->``'Cn layer, measured, wound n times, passing through the groove of the flange and winding in series in each winding groove, and pulling out the conductor from each winding groove to the next winding groove. A capacitor C is connected between the ground and a lumped constant electromagnetic delay line is constructed. FIG. 6 is an equivalent circuit diagram.

In addition to constructing a delay line by connecting a capacitor C to the conducting wire, by winding the valley winding with a pie filer together with the coil conducting wire, and then winding the valley bV winding, It is also possible to configure a distributed constant type delay line using distributed capacitance between the coil conductor and the capacitor jtt winding.

In this way, the electromagnetic delay line of the present invention has an inductance J
l' to l'! Since the coils forming the IJ, that is, the coil corners 1-6, 6', 6'', etc., are formed by sequentially shifting the windings 11q11 in the same direction with a pitch B,
If you adjust the distance between each coil bobbin +-6, 6', 6'' and the pinch B appropriately, as shown in the vr analysis (mentioned above), normal a and a2 are close to the theoretical 1 direct. Maximum life value (a1=o, 1
~02, a2 = 0.02~0. (13c, i! degree) becomes the selected 1if function, and good delay characteristics are obtained.

Furthermore, even if a non-magnetic bobbin is used as the coil bobbin, it is possible to reduce a and a2, so it is possible to narrow the predetermined spacing between the coil units 6' and 6'. Large + 1J external shape (one method can be made smaller and the cost can be reduced).

Furthermore, the fact that it is possible to arbitrarily reduce al and a2 means that the widths W and I' of the coil units 6.6', 6''.
), adjust the diameter of the conductor, the number of turns (1), and the number of winding layers (11).
1, it is also possible to set the interval D between the coil units 6.6' and 6'' to 0, or to directly connect the double row Jtj line group phase IL of the coil units 6.6' and 6''. .

For example, cement wire, which can be bonded to each other by heating the insulation coating, is wound around a winding frame and heated, then the winding frame is removed to form multiple coils without bobbins, and these coils are connected in series and laminated. Pressure 1
'a' is also possible. If such a bobbin is omitted and the inductance element r is formed using only a conductive wire, a reduced type 715. A magnetic delay line can be obtained.

Further, the delay line of the present invention can be implemented even if it is composed of an m-layer twisted/id (n=1) coil unit, or it can be implemented in the case of a 1n-1 and n-layer coil unit, that is, a spiral coil. It is also possible to implement it in units. ! Sometimes, in the case of 11-1 or m = l, the distribution volume between the conductors in each coil unit can be reduced, so for example, use in high frequency bands of 1.00 to 1.5 z or more is reduced to 4.
j(n can be maintained.

FIG. 7 shows another electromagnetic delay line according to the present invention, and schematically shows a coil unit.

In this embodiment, coil units 8 and 8' are wound in a frame shape.
, 8''... are sequentially shifted in the Y-axis and Z-axis directions in the figure to form U1γ. In this case, each coil unit 8
．． The coupling coefficient a1a2 can be easily selected to the optimum value without making the dimension in the width W direction at 8' and 8'' longer than the width T in the thickness T direction.

Furthermore, when implementing the present invention, the above-mentioned t-row conductor 1r'
all in fi)! 1 line is not necessary! -7. The object of the present invention can be achieved as long as the windings do not have to be in a perfect rolling state and are wound in the same direction.

Furthermore, although the shape of the bobbin is described as a rectangle in each of the embodiments described above, it is also possible to implement the bobbin in an oval shape, etc., and the distance between the wires facing each other in the coil unit is equal, such as in a square or circle. It is also possible to implement the

Also, in the case of a fill with an inductance element r・11
It is not limited to the conductor wire of the JIT in the track, but may be any conventionally known conductor strip, etc., and those that cannot be formed to be wound by printed wiring technology, film, etching method, etc. can also be used. be.

What should be noted in particular about the present invention is that the coils forming the inductance element are not simply shifted in the direction of reducing the area of the overlapping portion of adjacent coils in the direction of the winding axis, but all the coils are moved in the same direction. Lower the winding shaft to
This makes it possible to easily reduce al and a2 to a negative coupling state by sequentially shifting them while keeping the values . be.

As explained below in 1-1, the 'electromagnetic + l-' 4 wire of the present invention is an electromagnetic delay line formed by combining an inductance element and a capacitor in which a plurality of wound coils are connected in series. Since the winding shafts are arranged horizontally and sequentially shifted in the same direction, between each coil! Since it becomes possible to easily obtain a suitable coupling coefficient, good delay characteristics can be obtained in a wide frequency band.

Moreover, when a bobbin is used, it is possible to narrow the predetermined interval between the coils of the inductance element even if a non-magnetic one-diaphragm material is used, thereby reducing the size and cost. I can do it.

[Brief explanation of the drawing]

・251 Figure 43 Figure 2 shows the coil (coil unit) constituting the inductance element of the electromagnetic delay line of the present invention. FIG. 4 is a diagram showing the position ia relationship and coupling relationship of the coil (coil unit), FIG. 5 is a sectional view showing an embodiment of the electromagnetic delay line of the present invention, and FIG. 5
FIG. 5 is an equivalent circuit diagram of an electromagnetic delay line, and FIG. 7 is a schematic diagram showing another embodiment of the present invention. 1.2・3.4... Descending conductor! ! Y゛・5.5',
5″ coil bobbin, 6.6′, 6″ fill (coil unit), 7... windings! i7j, 8.8', 8''
-Coil (: coil unit)・C... Volume 1, Te,
t'l'111'+! 11 people Elmec Co., Ltd. 3M

Claims (1)

[Claims] An electromagnetic delay line formed by combining an inductance element and a capacitance in which a plurality of wound coils are connected in series, characterized in that the coils are arranged with winding axes parallel to each other and sequentially shifted in the same direction. delay line.