JPS58101513A - Delay line - Google Patents

Abstract

PURPOSE:To obtain a small-sized delay line usable in a very broad frequency, from low to high frequencies, by constituting an inductance element into a zigzag conductor line and folding back the broadwise direction of the line in parallel. CONSTITUTION:A conductor line consists of a conductor line 1 connected with zigzag folding and connecting pieces 3 projected from the folding sections of the conductor line and each folded section is formed in parallel so as to be ahead by one pitch P through a tilted jumper 1E. Currents flowing to opposing longitudinal conductors 1A, 1C and 1B, 1D are the same direction and those flowing between adjacent conductors 1A, 1B and 1C, 1D are opposite. Since magnetic fluxes phi1, phi2 form a short closed loop with two longitudinal conductors by clipping a nonmagnetic substance insulating plate 2, an inductance element L has the flat inductance characteristics up to a very high frequency, and through the positive interlinking of the phi1, phi2, a flat high inductance can be obtained even in an ultra high frequency band.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a delay line formed by combining an inductance element and a capacitance, and relates to a delay line suitable for use in a very wide frequency band from low frequencies to extremely high frequencies.

Conventionally, the rise time is fast, for example, the rise time is Ins.
As the following delay lines, a coaxial cable cut to a length that provides the desired delay time, and a type of distributed constant circuit such as a meander line have been proposed. However, the former is large and requires troublesome terminal processing, and the latter is large and expensive, and its characteristics are not good, so neither has been put into practical use.

In addition, as a small delay line, an inductor element and a capacitance C
A lumped constant delay line using

However, in this delay line, as the frequency band increases, the inductance element has frequency characteristics and the Q of the inductance element also decreases, so both the delay and amplitude characteristics deteriorate, making it difficult to use a 1fMK with a high-speed delay of 1fMK when the rise time is longer than Insns. be.

The present invention has been made to solve the above-mentioned drawbacks.
The purpose of this invention is to provide a compact delay line that can be used in an extremely wide frequency band from low frequencies to high frequencies.

The details of the present invention will be explained below with reference to the drawings.

1 and 2 are views showing an embodiment of the delay line of the present invention, and in particular, FIG. 1st
In the figure, the conductive line 1 of the inductance element consists of a conductive line 1 which is folded in a zigzag shape and connected together, and a connecting piece 3 which projects from the folded part of the conductive line.
Each individual conductive line has a parallel inclined conductive line 1E in the center part in the width W direction, that is, a region between parallel lines xx and Y-Y on the conductive line 1, and vertical conductive lines IA, 1B.

It is divided into IC, ID, etc. Therefore, each conductive line 1 is formed in parallel so as to precede the inclined conductive line 1E by one pitch P. In other words, the front and back of each inclined conductor path 1E (
(top and bottom in the figure) are shifted by one pitch. Note that the width direction wh of the conductive line 1 is the direction of the extension line of each conductive line 1.

The conductive line 1 thus formed is bent into a U-shape along the parallel lines 1x-x and Y-Y on the conductive line, and is adhered to a long and thin non-magnetic insulating plate 2 made of glass or synthetic resin.
It constitutes an inductance element as shown in the figure.

The inductance element has an inclined conductive line 1E on one side surface of the non-magnetic insulating plate 2, and an inclined conductive line 1E on the opposite main surface.
The front and rear vertical conducting lines IA, IB, IC, ID, . . . are bonded together, and a connecting piece 3 protrudes from the other side.

On the other side of the elongated insulating plate 2, a capacitor element C is formed by providing a capacitor electrode 5 on the opposite surface of a dielectric plate 4 with a ground chamber &6 in between. The electrode 6 is connected and fixed. And each vertical conducting line IA with an inductance element
, 1B, IC.

1D... and the capacitor element C formed between the connecting piece 3 of the conducting line and the ground electrode 6, a lumped constant delay line is formed as shown in FIG.

The delay line of the present invention configured in this manner includes any four adjacent longitudinal conductive lines of the conductive line 1 including the inductance element, for example, IA, 1B, and IC.

Considering 1D, magnetic fluxes Φ1 and Φ2 as shown in FIG. 2A are generated by the current flowing in the direction of the arrow shown in FIG. 2B. These magnetic fluxes Φ and Φ2 are distributed between the vertical conductive lines 1A and IC on the main surface topsoil facing the non-magnetic insulating plate 20,
Since the currents flowing through 1B and 1D are in the same direction, a positive bond is formed. On the other hand, adjacent longitudinal conductive lines I on each main surface
A(!: Since there is a negative coupling between 1C and 1D, the magnetic fluxes Φ1 and Φ2 form independent short magnetic flux loops. It holds true even if you choose .

In this way, the magnetic fluxes Φ1 and Φ2 sandwich the non-magnetic insulating plate 2 and form a short closed loop with two vertical conducting paths, so the inductance element has flat inductance characteristics up to very high frequencies. and magnetic flux Φ1 and Φ
2 is constituted by positive coupling, the inductance increases, and a sufficiently high inductance can be easily obtained even at extremely high frequencies, for example, in ultra-high frequency bands of IGHz or higher. As a result, an ultra-fast delay line at ultra-high frequencies is obtained. In particular, this point is important because magnetic materials such as ferrite, which improve the inductance of inductance elements, have lower magnetic permeability and higher losses in ultra-high frequency bands, making it impossible to use them as bobbins.
It is extremely useful because a high inductance can be obtained using this method.

Furthermore, the delay S of the present invention is caused by positive coupling between conductive lines I A, I C, I B, and ID corresponding to mutually adjacent sections in the equivalent circuit diagram of FIG. 3 in the inductance element. As shown in the equivalent circuit diagram of FIG. 3, an inductive m-type lumped constant delay line is constructed, and the delay characteristics are improved from this point as well.

FIGS. 4 and 5 are diagrams showing other embodiments of the delay line of the present invention. FIG. 4 is a developed view of the inductance element, and the conductive line 1 has a folded width W longer than the folded width shown in FIG. .

It has an inclined conducting line 1E at a position corresponding to between Y and Y, and two parallel lines mX'-X' are provided between this inclined conducting line 1E and both folded parts IF and IF (upper end and lower end in the figure).
, an inclined conductor line IE' between Y'-Y',
IE' is formed. Moreover, the plane inclined conductor line I
E' and IE' are formed so that the conductive lines before and after the central inclined conductive line 1E are shifted by one pitch in the opposite direction with respect to the central inclined conductive line 1E. In other words, the vertical conducting line 1 has a folding pitch 1 shifted by the inclined conducting line 1E in front and back (up and down in the figure), with the inclined conducting line 1E formed between parallel lines 1x-x and Y-Y as a reference. minutes, parallel lines X' - X', Y' -
Inclined conductive line IE' formed between corresponding to Y',
IE' is configured to urinate in the opposite direction.

Also, a horizontal conducting line IF is a folded part in the conducting line.

In 1F, the conductor line is wider than the vertical conductor line, and functions as capacitor electrodes 6, 6, which will be described later. This shows that.

Reference numeral 2.2' is an elongated non-magnetic insulating plate, which is similar to the above-mentioned second
It is made of the same material as the non-magnetic insulating plate 2 shown in the figure, but is slightly thinner. The conductive line 1 shown in FIG. 4 is the parallel line IX.
X, Y Parallel and U-shaped at the location corresponding to Y'
It is bent to the non-magnetic insulating plate 2 and is
The points corresponding to X'-X' and Y'-Y' are parallel to
It is bent into a U-shape in the opposite direction to the locations corresponding to -X and YY, and is bonded to the non-magnetic insulating plates 2', 2'. That is, a conductive line 1 is bent into a crank shape, and three non-magnetic insulating plates 2. On the opposing main surfaces of 2' and 2' are longitudinal conductive lines, and inclined conductive lines IE and IE'.

IE' is properly attached to the side surface to form an inductance element. The horizontal conducting lines IF and IF, which are the capacitor electrodes 5 and 6 of the conducting lines, are non-magnetic insulating plates 2',
2' in the same direction (lower in the figure).

Dielectric plates 4, 4 are formed at the bottom in the longitudinal direction of the non-magnetic insulating plates 2゜2' on both sides of the inductance element, covering the capacitor electrodes 5, 6. The U-shaped ground plate 7 is a non-magnetic insulating plate 2'; 2. 2'
A capacitor element C is formed and arranged so as to sandwich the , and a lumped constant type delay line is constructed.The delay line configured in this way is made of non-magnetic material, similar to the delay line shown in FIG. Insulating plate 2', 2. Since the vertical conductive lines facing each other via 2' are shifted by one pitch, the magnetic flux generated by the opposing vertical conductive lines is all positive coupling, while the magnetic flux generated by the adjacent vertical conductive lines on the same plane is 0 where the magnetic flux forms a short loop due to negative coupling.
Therefore, induct. The transducer element exhibits high inductance evenly up to very high frequency bands. Furthermore, as the number of positively coupled conductive lines increases, the inductance of the inductance element increases significantly.As a result, a delay line with a fast rise time can be obtained in a wide frequency band from low chest wave numbers to very high frequencies. In addition, if the folding width W of the zigzag-shaped conductor line 1 is increased to increase the number of inclined conductor lines and the number of parts to be bent in a U-shape is increased, positive coupling is performed by sandwiching a nonmagnetic insulating plate. As the number of vertical conducting lines increases,
It becomes possible to rapidly increase the inductance of the inductance element. In addition to the example shown in FIG. 6, the direction in which the conducting path is bent may be as shown in FIG. 9. In short, all you have to do is shift the pinch and sandwich the nonmagnetic insulating plates so that the vertical conductor lines face each other in a positive coupling state.The number of inclined conductor lines and the number of bends can be arbitrarily determined according to the desired delay characteristics. Bye.

Further, the delay line shown in FIG. 6 is connected to one capacitor electrode 5. Since 5 consists of folded portions IF and IF in the conductive line 1 of the inductance element, there is no need for soldering between the inductance element and the capacitor element C for constructing the delay line. Therefore, connection failures are eliminated, reliability is improved, and the number of assembly steps is reduced due to the omission of connection steps, making it possible to significantly reduce costs.

Note that the delay line shown in FIG. 6 also has an inductive m-type delay line similar to the delay line shown in FIG. 2, so the delay characteristics are extremely good. In , the groove insulating plate 2 constituting the inductance element of the delay line. 2
When using thin plates 2 and 2, non-magnetic insulating plates 2 and 2 are used. Since the positive coupling between the vertical conductor lines facing each other with 2' and 2' in between increases, the inductance of the inductance element increases further, resulting in good characteristics, and the external dimensions of the delay line can be made ultra-small. can. The strength of the positive coupling between the vertical conductor lines is also related to the value of the degree of coupling a between the inductance elements in the adjacent sections in the equivalent circuit diagram shown in Figure 3, so the conductor lines can be folded according to the desired characteristics. Bending area and non-magnetic insulating plate 2. Determine the thickness of 2' and 2'.

Next, an application example of the delay line of the present invention will be explained.〇Figure 6 is a partial front view A and a partial side view 8 showing a variable delay line using the delay line of the present invention, and Figure 7 is a partial front view A and a partial side view 8 of a variable delay line using the delay line of the present invention. This figure shows a conductive line (a modification of the conductive line shown in FIG. 1) 1 having an inductance element used in the present invention.

The conductive line used for the variable delay line shown in Fig. 6 consists of two parallel #X
A short length vertical conductive line 8 is formed between two parallel lines U-U and V-V with a short mutual distance formed further inside between -X and Y-Y, and this vertical conductive line Before and after 8 (top and bottom in the diagram)
A short inclined conductive path 1E is formed at.

Then, as shown in FIG.
It is bent into a U-shape at the location corresponding to (2), and is glued to the non-magnetic insulating plate 2 so that the vertical conductive line 8 sandwiched by the inclined conductive line 1E is positioned on the side surface of the non-magnetic insulating plate 2. The inductance element is increased *a, and the vertical conductive line 8 on the side surface (upper surface in the figure) of the nonmagnetic insulating plate 2 functions as a fixed contact array of the variable delay line.

The contact electrode 6 formed in the shape of a letter is fitted so as to face the capacitor electrode 5, and a capacitor element C similar to the capacitor element C shown in FIG. 2 is formed, and the inductance element and the capacitor element C are Fixed contact 8 for switching by
A delay @17 is configured for a variable delay line with columns.

The non-magnetic insulating plate 2 is housed in a housing 14 (partially shown) of the variable delay line, with the 8 rows of fixed contacts of the non-magnetic insulating plate 2 facing against the inner surface of the upper part of the housing 14. ing. A non-magnetic insulating plate 2 and a sliding hole 16 facing each other along the longitudinal direction are provided on the upper part of the casing 14, and a terminal electrode 13 is provided on the inner surface of the upper part of the casing 14.

Inside this housing 14 there is a knob 16 between it and the non-magnetic insulating plate 2.
A sliding body 12 is provided with a knob 16 protruding from the sliding hole 16 and is movably arranged in electrical contact with the terminal electrode 13. 12, and has an elastic arcuate shape that is electrically connected to the terminal electrode 13 on the inner surface of the casing 14 and slidable in electrical contact with the 8 rows of fixed contacts of the inductance element on the side surface of the non-magnetic Mm plate 2. A slider 11 is provided protrudingly. That is, as the sliding body 12 slides, the slider 11 sequentially connects the fixed contact 8 and the terminal electrode 13 of the housing 14, thereby forming a variable delay line. FIG. 8 is an equivalent circuit diagram of the variable delay line.

Note that the terminal electrode 13 of the housing 14 is connected to the output terminal (
(all not shown) K-connected.

The variable delay line configured in this way is constructed by moving the slider 12 shown in FIG.
By sequentially leading out the signals to the output terminals via the terminal electrodes 13 of the housing 14, an arbitrary delay characteristic can be set by selecting a desired delay time.

Moreover, as explained in connection with the delay line of FIG. 2, the inductance element has a flat inductance characteristic up to extremely high frequencies, so that good variable delay characteristics can be obtained over a wide frequency band.

Furthermore, since the fixed contact 8 of the preferential time selection switch, which serves as a variable delay line, is made up of a part of the conductive line 1 having an inductance element, the structure is simple and extremely compact. Note that the conductor line 1 shown in FIG. 7 can be implemented as a delay line shown in FIGS. 2 and 6, and the variable delay line shown in FIG. It is also possible to configure it with elements.

In addition, in the above-mentioned delay line, the conducting line 1 is connected to the non-magnetic insulating plate 2.
, 2' has been explained, but if a structure is adopted in which the non-magnetic insulating plate provided with the conductive path is sandwiched between magnetic plates, the inductance will further increase and it will be useful for improving the delay time. be.

As explained above, the delay line of the present invention is a delay line that is a combination of an inductance element and a capacitance, in which the inductance element is constructed by shifting the width direction of a zigzag conductive path in parallel and folding it back. It not only provides a fast rise time and good delay characteristics in a wide frequency band from low frequency bands to extremely high frequency bands, but also has the advantage of being extremely compact.

The present invention is applicable not only to the lumped constant type delay line as described above but also to distributed constant type delay lines.

[Brief explanation of drawings]

FIG. 1 is a developed view showing a conducting path of an inductance element used in the delay line of the present invention, and FIGS. 2A-2C are a partial sectional view, a partial front view, and a side view showing an embodiment of the delay line of the present invention.
FIG. 3 is an equivalent circuit diagram of the delay line shown in FIG. 2, FIG. 4 is a developed diagram showing a conductive path of an inductance element in another embodiment of the delay line of the present invention, and FIGS. A partial front view (partially cut away) and side view showing another embodiment of the delay line of the present invention configured using the conductive line shown in the figure,
FIG. 6 is a partial front view and a partial side view showing a variable delay line using the delay line of the present invention, FIG. 7 is a developed view showing an inductance element used in the variable delay line shown in FIG. 6, and FIG. Equivalent circuit diagram of the variable delay line shown in Figure 6, Figures 9A-D
H is a schematic diagram showing a method of bending a conductive line in the inductance element of a delay line of the present invention. 1... Conductor path, 1A to 10... Longitudinal Umeji, IE. 1 E'... Inclined conductor line, 1F... Horizontal conductor line, 2゜2'... Nonmagnetic insulating plate, 3...
... Connection piece, 4 ... Dielectric plate, 6 ...
・Capacitor electrode, 6... Ground electrode, 7...
...Ground plate, 8...Fixed contact, 11...
...Slider, 12...Sliding body, 13...
・Terminal electrode, 14... Housing, 17...
Delay line, L...Inductance element, C...
...Capacitor element patent applicant Elmec Co., Ltd. 1 Figure 2 times (A) (B) (C) 3 Figure 4 Figure 5 Figure (A) CB) ZZ'lP
Ko 4Cj SL Cl315
Riya 7 Figure ya 6 Figure ya 8 Figure ya (A) (Japanese) (C) (0)

Claims (4)

[Claims] (1) A delay line formed by combining an inductance element and a capacitor, characterized in that the inductance element is constructed by folding back a zigzag-shaped conductive line with its width direction shifted in parallel. (2) The inductance element is configured by an inclined conductive path formed halfway in the width direction of each zigzag conductive path, and the conductive paths at the front and rear of the inclined conductive path are folded back and shifted by one pitch, and the inclined conductive path is shifted by one pitch. Claim 1 characterized in that it is folded back at the road.
Delay line as described in section. (3) The delay line according to claim 2, wherein the inductance element is folded back multiple times in a plurality of inclined conductive paths formed in a zigzag conductive path. (4) The delay mode according to claim 2 or 3, wherein the inductance element is a slanted conductive path formed in a zigzag conductive path as a fixed contact array for a delay time selection switch.