JPS59140712A - Electromagnetic delay line - Google Patents

Abstract

PURPOSE:To obtain an electromagnetic delay line which has such excellent delay characteristics that distortion in an output waveform is less and a starting time is short by arranging respective sections of inductance elements so that the opposite surfaces of adjacent sections are opposed spreading in the opposite direction alternately. CONSTITUTION:A bobbin 1 made of a nonmagnetic rod is wound with a conductor 2 at specific pitch P in a single-layer solenoid shape with space left and slantingly in the opposite direction alternately at specific intervals S to form an inductance element 3. This inductance element 3 has plural sections each corresponding to one turn of the conductor 2 as one-section inductance, and the conductor 2 is grounded by a capacitor with capacity C in every turn, constituting an electromagnetic delay line. Then, a1>a3>a5->0 and a2<a4<a6-<0, where a1, a3, a5- are coupling coefficients of odd-numbered sections and a2, a4, a6- are coupling coefficients of even-numbered sections. Further, the values a1, a2, a3- are set to optimum values.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic delay line that combines an inductance element and a capacitor. Concerning electromagnetic delay lines up to the extended time ones. □ Conventionally, for example, a lumped constant type electromagnetic delay line is constructed by winding a conductor around a bobbin to form an inductance element, and connecting a capacitor between the conductor and ground at each predetermined turn of the inductance element. Are known.

However, in the electromagnetic delay line configured in this way, it is difficult to obtain an optimal coupling state in the inductance element in a high frequency band, for example, in a band above l(}Hz, so it is difficult to obtain a rise time of Insns or less. Under these circumstances, the inventor of the present invention conducted extensive research and devised the winding method and arrangement of the conductive wire in the inductance element, thereby achieving an optimum performance even in high frequency bands. We have found that it is possible to obtain a bonded state that is

The present invention was made in order to solve the drawbacks of the conventional inductance element.It is possible to easily select the optimal coupling state in the inductance element, and the output waveform has less distortion, has a fast rise time, and has good delay characteristics. The purpose is to provide electromagnetic delay lines.

In order to achieve this object, the present invention provides an electromagnetic delay line consisting of a combination of an inductance element consisting of a plurality of sections wound with a conductor and a capacitor, in which each section of the inductance element is arranged so that the adjacent sections are opposite to each other. The surfaces are arranged so as to alternately expand in opposite directions and face each other.

According to the configuration of the present invention, it is possible to easily select the optimal coupling state of the inductance element even in high frequency bands, and it is possible to improve the distortion of the output waveform, speed up the rise time, etc., and reduce the delay. Characteristics can be improved.

The present invention will be explained in detail below.

1 and 2 relate to the electromagnetic delay line of the present invention.

FIG. 3 is a top view and a front view showing an example. The bobbin 1 made of a rod-shaped non-magnetic material has a flat rectangular cross section with a dimension in the width W direction that is sufficiently longer than the dimension in the thickness T direction, and a conductor 2 is space-wound in a single layer warp/id shape to form an inductance element. 3 is formed.The inductance element 3 is formed by, for example, winding the conducting wire 2 around the bobbin 1 at a predetermined pitch P in a single-layer solenoid shape, and then tilting the conducting wire 2 alternately at a predetermined interval S in the opposite direction. It is wound like this. In other words, at a certain point, the distance between the adjacent parallel conducting wires 2 on the lower surface 1b of the bobbin 1 is wider than the distance G between the adjacent parallel conducting wires 2 on the upper surface 1a of the bobbin 1. , top surface 1 of bobbin 1
On each of the upper surface 1a and the lower surface 1b of the ribbon bobbin 1, the distance between the adjacent parallel conductive wires 2 is alternately wide and narrow, and the conductive wires 2 for one turn are wound repeatedly. The formed surfaces alternately face and expand in opposite directions with similar surfaces in adjacent turns.

In addition, the relationship between the pitch P1 interval S and G in FIG. 1 is 5=
PG and G<P, and the arrow in the conductor 2 indicates the direction in which the current flows.

This inductance element 3 converts one tan of the conducting wire 2 into one
It has a plurality of sections as the inductance of the section, and as shown in FIG. 2, a lumped constant type electromagnetic delay line is constructed by connecting the conducting wire 2 and the ground at each turn with a capacitor of capacitance C. Note that the inductance of each section is the conductance in the width W direction. 2 is an equivalent circuit diagram of the electromagnetic delay line shown in FIGS. 1 and 2, where β1 is the coupling coefficient between adjacent inductances L, and a2 is the 2 The coupling coefficient between the n-th inductance L'Ill 1 symbol an is the coupling coefficient between the n-th inductance L, and in Figure 3, the coupling relationship with the leftmost inductance L is shown, but there are also inductances on the left side. L is connected to these inductances, and other inductances L are similarly connected to the left and right inductances L.

Next, the coupling state in the inductance element of the electromagnetic delay line configured as described above will be explained.

First, in FIG. 1, the positional relationship between the section consisting of one pair of conducting wires 2a and 2b on the left end and the section consisting of similar sets of conducting wires on the right side is as follows: On the other hand, between the even-numbered sections, it becomes as shown in Figure 4B.
It becomes as shown in .

In FIG. 4A, the mutual induction between the conductors 2a and 20 is expressed as Ml.
, M2 is the mutual induction between the conductors 2b and 2c, Ma is the mutual induction between the conductors 2a2d, and M4 is the mutual induction between the conductors 2b and 2c.
Then, since the direction of the current flowing through the conductors 2a and 2c is the same, Ml and M2 are positively coupled, but on the other hand, the direction of the current flowing through the conductors 2a and 2c is positive.
Since the directions of the currents flowing through a and 2c and the currents flowing through conductors 2b and 2d are opposite, Ma and M4 are negatively coupled. In addition,
Here, M1 to M4 are shown in absolute values.

Therefore, the mutual induction between the section of conductor 2a12b and the section of conductor 2C%2d is Mi + M2 Ma - M4.1
! :Moreover, from the distance relationship between each conducting wire 2a to 2d, M2
>Ma=M4>Ml, and it can be seen that the coupling in the arrangement relationship of the conducting wires shown in FIG. 4A is always positive.

In Figure 4B, the mutual induction between the conductors 2a and 20' is M
1', the mutual induction between conductors 2b and 2d' is M2', conductor 2
The mutual induction between a and 2d' is M3', and the conductors 2b and 2c'
If the mutual induction between the conductors IM2a and 20' is M4', the direction of the current flowing through the conductors IM2a and 20' is the same, and the conductors 2a and 2c'
Since the direction of the current flowing in b and 2d' is opposite, M1
' and M2' are positive bonds and M1'-M2', and M
3' and M4' are negative bonds and M4'>M3'
becomes.

Note that M1' to M4' are shown as absolute values.

Therefore, the mutual induction between the sections of conductors 2a and 2b and the sections of conductors 20' and 2d' is Ml'-4-M2'-M
3 'M4'. If the distance in the winding axis direction of bobbin 1 is small, M1'+M2'M3'
-M4') OK 7 The connection of the conductor arrangement shown in Figure 4B is positive, but the distance is large.
! : Mt' 10 M2' - M3'M4'<
0, that is, the coupling between the conducting wires is in a negative state. The relationship between mutual induction and distance in the arrangement of the conducting wires in Figure 4B is positive and thickest when D is minimum, decreases as D increases, reverses from 0 to negative, and reaches a negative minimum. It decreases while remaining negative through the state. For example, as the thickness T of the bobbin 1 is reduced while keeping the distance S between the conducting wires 2 constant, the degree of the change becomes negative at a shorter distance, and the absolute value of the minimum value also becomes larger. Moreover, since the distance in FIG. 4 is 2P between the closest sections, that is, the second inductance, it is possible to easily arrange the two sections so that the coupling becomes negative without being extremely close to each other. .

Summarizing the above considerations, for odd-numbered sections in Figures 1 and 3, al ) a3 ) as
...>0, and for even-numbered sections, az
〈a4<a6...〉O・Furthermore, the values of al, az, 33, etc. can be selected to the optimum values by adjusting the wire diameter and dimensional relationship of the conductor 2. Because it is possible, it is possible to obtain delay characteristics with a fast rise time and little output waveform distortion. Moreover, bobbin 1 and conductor 20
By appropriately selecting the dimensions, it is possible to use the device in a small size and in a high frequency band.

In addition, in the above-mentioned embodiment, in order to simplify the explanation, the bobbin 1 whose dimension in the width W direction is longer than the dimension in the thickness T direction was used, and the influence of the conductor wire 2 on the thickness T side was explained as being small. When implementing the electromagnetic delay line according to the present invention, it can be easily designed even if the conducting wire 2 on the thickness T side is taken into account, and the bobbin 1 is not limited to a flat one. For example, a bobbin with an oval or circular cross section may be used, and the material of the bobbin 1) is not limited to non-magnetic material.

The present inventor has developed a wire with a wire diameter of 0 as a specific example of the above configuration.
．． 1 m+n conducting wire 2, W= 13 mm-T=
0.2run, P = 1.5 mm - G = 0.
As a result of configuring a delay line of 20 sections by winding the wire 20 times at 23 rtrm and connecting a 20PF capacitor between conductor 2 and ground at each turn, a total of l'Qn is obtained at 500Ps per section.
A delay time of s and a characteristic impedance of 50Ω were obtained. In this case, the design value of the coupling coefficient is as = 0.159
95, az = -0,02049, a3 = 0.008
29, a4=-0,00383, as=0.002
36, a6--0.00137, and the phase delay distortion is 1% within 90% of the theoretical cutoff frequency of 930MHz.
It is possible to suppress it within

In the above embodiment, the inductance element 3 was formed by winding the conducting wire 2 around the bobbin 1, but in addition to winding the conducting wire 2,
It is also possible to form a conductor layer on the surface of a bobbin made of alumina porcelain or the like by plating or the like, and then to mechanically grind, photoetch or laser beam process the surface of the bobbin.

Further, as shown in FIG. 5, a plurality of parallel conductor strips 6a, 6b, 6c, etc. are formed between opposing frame pieces 4 with support pieces 5 in between by etching the conductor foil. , conductor strip 6a
, 6b, 6c, . . ., at the boundary between the support piece 5 and the conductor strips 6a, 6b, 6c, . and virtual lines x-x', x -x', Y, -Y,', Y2-Y2',
Considering z-z', for example, in the adjacent conductor strips 6a and 6b, the interval between x-x' and Yl-Y1' is narrowed, and x
-x' and x -X' expands diagonally and
' and Y2-Y2', and the conductor strips 6a, 6b, 6c...
... can be used as an inductance element.

In addition, the reference numeral 8 in FIG. 5 is a connecting piece that connects the conductor strips 6a, 6b, and 6c.
At Y2', bend the conductor strips 6a, 6b, 6c...at right angles, cut and separate the connection piece 8 from the frame piece 4, and connect the conductor strips 6as, 6bs, 6c... By connecting the pieces 8, a single-layer solenoid-shaped space-wound inductance element 9 as shown in FIGS. 6 and 7, which will be described later, is obtained.

6 and 7 show an electromagnetic delay line constructed using the inductance element 9 shown expanded in FIG. 6, in which the conductor strips 6a16b, 6c... 1, each conductor strip 6a, 6b, ec...
The connecting piece 8 is cut and separated from the frame piece 4.
A dielectric plate 11. with a ground electrode 1o formed on the negative side. The stacked connection part of the connection piece 8 is connected to the electrodes 12 of a composite capacitor 13, which has electrodes 12 formed at a predetermined pitch on the opposing surface of the composite capacitor 13. It is composed of

Furthermore, as shown in FIG. 8, the electromagnetic delay line of the present invention is arranged on opposing surfaces of the bobbin 1, for example, the upper surface 1a and the lower surface 1b in the figure.
, winding grooves 14a-14'b, 14 having a wedge-shaped cross section (7-shaped)
c, 14d, and the winding groove 14a on the upper surface 1a of the bobbin 1.
, 14c, and the winding groove 14 on the lower surface 1b of the bobbin 1.
The intervals between the winding grooves 14a and 14b are narrowed, and the winding grooves 14a and 14b are narrowed.
The conductive wire 2 is wound multiple times as a set to form one section of the inductance element, while the conductive wire 2 is wound multiple times as a set of winding grooves 14c and 14d to form one section of the inductance element. are doing.

In addition, on the upper surface 1a and the lower surface 1b of the bobbin 1, the winding grooves 14a and 14d are formed alternately wide and narrow, respectively.

The electromagnetic delay line configured in this way also has coupling coefficients a1, a
3, a5... to positive coupling, coupling coefficients a2, a4
... can be negatively coupled, and the value of each coupling coefficient can also be arbitrarily set, making it possible to improve the distortion of the output waveform and speed up the rise time.

In addition, when the conductive wire is wound multiple times around the winding groove of the bobbin 1, the value of the inductance L can be increased, so that a delay line with a relatively long delay time can be constructed. In that case as well, it is possible to obtain the optimum coupling coefficient, and therefore distortion of the output waveform can be suppressed. Furthermore, if the winding groove has a wedge-shaped cross section as shown in FIG. 8, the conducting wire 2 can be wound tightly, making winding easy and accurate.

The electromagnetic delay line of the present invention can achieve its purpose if each section forming an inductance element is arranged so that the opposing surfaces of the adjacent sections are expanded in opposite directions and face each other. .

Note that the opposing surfaces between adjacent sections refer to the surfaces formed perpendicularly to the winding axis by the conductor wound in each section, and one turn as in the embodiment shown in Fig. 1 above. When one section is formed by one turn, it is formed by one turn of conductor, and when one section is formed by plural turns as shown in Fig. 8, it is formed by plural turns of conductor in the winding groove. . Further, when each section is formed of a solenoid-shaped or coiled conducting wire, it is a surface formed by the end surface of the conducting wire. ' Furthermore, in the present invention, it is possible to omit the bobbin as an air-core structure, which is limited to the case where each section of the inductance element is wound on the same bobbin. It is also possible to arrange the sections so that their opposing surfaces alternately expand in opposite directions and face each other. When using individual bobbins, a magnetic material can be used for the bobbins.

According to the present invention as described above, the distortion of the output waveform becomes small and the rise time becomes fast, so that the delay characteristics can be improved.

Note that in the present invention, a distributed constant type delay line can also be constructed by providing a conductor for forming a capacitor in the inductance element.

[Brief explanation of the drawing]

1 and 2 are top and front views showing one embodiment of the electromagnetic delay line of the present invention. FIGS. 3 and 4 are equivalent circuit diagrams of the electromagnetic delay line shown in FIG. Figure 5 is a diagram explaining the coupling relationship, Figure 5 is a developed diagram showing another example of an inductance element used in the magnetic delay line of the present invention, Figures 6 and 7 are diagrams showing an electromagnetic diagram using the inductance element shown in Figure 6. A front view i and a side view showing the delay line, and FIG. 8 are a plan view (partially shown) showing still another embodiment of the present invention. 1...Bobbin, 2...Conductor, 3.9.
...Inductance element, 6a, 6b, 6c
...Conductor strip, 8...Connection piece, 13...
...Capacitor (composite capacitor) Patent applicant Elmec Co., Ltd. 73rd field 5th field 6th field 7th field field

Claims (4)

[Claims] (1) In an electromagnetic delay line consisting of a combination of an intellitance element consisting of multiple sections of a conductor wound and a capacitor, each section of the intellitance element and the opposing surfaces between adjacent sections are alternately expanded in opposite directions. An electromagnetic delay line characterized by being arranged so as to open and face each other. (2) The electromagnetic delay line as claimed in claim 1, wherein the intellitance element is formed by winding a conductor around a bobbin in the form of a single layer solenoid in a space, and one section corresponds to one turn. (3) The electromagnetic delay according to claim 1, wherein the inductance element has one section that is a conducting wire wound in a pair of opposing winding grooves among the winding grooves formed on the opposing surfaces of the bobbin. line. (4) An electromagnetic delay line according to claim 3, wherein the inductor screw element is formed on one bobbin, and a conductive wire is wound in a plurality of turns around a winding groove.