JP3038035B2 - 2 distributor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-way divider for bisecting a high-frequency signal used in a CATV system or the like.

[0002]

2. Description of the Related Art Conventionally, a two-way splitter for splitting a high-frequency signal into two is divided into two equal parts by one two-way transformer, and
There is a method in which impedance matching is performed by two matching transformers. In the above-mentioned two-way distributor, a required number of turns is wound around each core member forming one two-way distribution transformer and two matching transformers, and a distribution / matching set type is formed by connecting the terminals. Are known.
Here, in general, the two-way distributor has a distribution loss characteristic between an input terminal of the distribution transformer and an output terminal of each matching transformer and a coupling loss characteristic between terminals between output terminals of each matching transformer. In the two divider, the smaller the distribution loss, that is, the smaller the absolute value of the characteristic value, the better.
It can be said that the larger the terminal coupling loss, that is, the larger the absolute value of the characteristic value, the better.

[0003]

In general, the distribution loss and the coupling loss between terminals of the above-mentioned two-way divider are generally higher in the higher frequency band of the high frequency band and lower in the lower frequency band as the number of windings of the winding is reduced. On the contrary, there is such a characteristic that the larger the number of windings of the winding, the better on the low side of the high frequency band and the worse on the high side. In addition to this characteristic, the distribution loss characteristic and the coupling loss characteristic between terminals (hereinafter referred to as transmission characteristics) of the two-divider tend to rapidly deteriorate at different frequencies in the high frequency band. However, it has been difficult to obtain a two-way divider having excellent transmission characteristics in a wide band. With the above problems in mind, the inventors have conducted intensive experimental research, and as a result, the transmission characteristics of the two-divider are such that the distribution transformer is formed with respect to the width or thickness of the periphery of the core member on which the matching transformer is formed. Was determined to be governed by the width or the thickness of the central part. However, the core member has the following restrictions. The high frequency soft ferrite, which is a core member of the distributor, is manufactured by molding and sintering metal oxide powder or the like. In the above-described molding, the hole around which the winding of each transformer formed on the core member is wound is compressed in the axial direction. However, if the thickness of the core member in the axial direction is largely different, there is a problem that the compression pressure is not uniformly transmitted to the material, the composition density is not uniform, and the mold is damaged. When the composition density becomes uneven,
The magnetic permeability of the core member may be non-uniform, or the material may be sintered, resulting in chipping or cracking of the final product, which unfavorably affects the characteristics of the distributor. Further, if the mold is damaged, stable production becomes impossible. For this reason, there is virtually no production of core members having greatly different thicknesses.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to allow the width or thickness of a central portion of a core member to be freely set with respect to the width or thickness of a peripheral portion. An object of the present invention is to provide a distribution / matching integrated two-way divider which can be set and has excellent transmission characteristics over a wide band for high frequency signals.

[0005]

A first feature of the invention for solving the above-mentioned problem is that the input signal from the input terminal side is formed in the center of the core member and is divided into two equal parts. Two-way transformer that outputs to the side, and is formed around the core member by one winding continuously from each of the distribution terminals of the two-way transformer.
A distribution / matching integrated two-way divider comprising two matching transformers for converting impedance, wherein the width of the central part of the core member forming the two-way transformer and the two matching transformers are formed. And the width of the peripheral portion of the core member is different.

A second feature is that a two-distribution transformer formed at the center of the core member and bisecting an input signal from the input terminal side and outputting the signal to each distribution terminal side, and a peripheral part of the core member And each of the two distribution transformers is formed by one winding continuously from each of the distribution terminals.
A distribution / matching integrated two-divider comprising two matching transformers for converting impedance, wherein a width and a thickness of a central portion of the core member forming the two-distribution transformer and the two matching transformers are determined. The width and thickness of the peripheral portion of the core member to be formed are different.

A third feature is that a two-distribution transformer formed at the center of the core member and bisecting an input signal from the input terminal side and outputting the signal to each distribution terminal side, and a peripheral part of the core member And each of the two distribution transformers is formed by one winding continuously from each of the distribution terminals.
Further , there is provided a distributor / matching integrated two-divider comprising two matching transformers for converting impedance, wherein the core member comprises a core body and another auxiliary core stacked on a central portion of the core body. The width of the central portion of the core body forming the two-distribution transformer and the width of the auxiliary core are different from the width of the peripheral portion of the core body forming the two matching transformers.

A fourth feature is that a two-distribution transformer formed at the center of the core member and bisecting an input signal from the input terminal side and outputting the signal to each distribution terminal side, and a peripheral part of the core member And each of the two distribution transformers is formed by one winding continuously from each of the distribution terminals.
Further , there is provided a distributor / matching integrated two-divider comprising two matching transformers for converting impedance, wherein the core member comprises a core body and another auxiliary core stacked on a central portion of the core body. The width and thickness of the central portion and the auxiliary core of the core body forming the two-distribution transformer are different from the width and thickness of the peripheral portion of the core body forming the two matching transformers.

[0009]

Operation and Effect As an operation and effect of the first feature, the width of the central portion of the core member forming the two-distribution transformer and the width of the peripheral portion forming the two matching transformers are appropriately changed. As a result, the value of the characteristic impedance of the two distribution transformer or the matching transformer formed on the core member changes,
The transmission characteristics in the distributor can be changed. As a result, the two-way splitter of the present invention can obtain excellent transmission characteristics over a wide band for high-frequency signals.

As a function and effect of the second feature, the core member has a width and a thickness of a central portion forming the two-distribution transformer, and the core member has a width of 2 mm.
The width and thickness of the periphery forming one matching transformer can be changed appropriately. Thereby, 2 formed on the core member
The value of the characteristic impedance of the distribution transformer or the matching transformer changes, and the transmission characteristics of the two divider can be changed. As a result, the two-way splitter of the present invention can obtain excellent transmission characteristics over a wide band for high-frequency signals.

The third feature of the present invention is that the core member comprises a core body and another auxiliary core stacked on the center of the core body, and the central part of the core body forming the two-distribution transformer. The width of the auxiliary core and the width of the periphery of the core body forming the two matching transformers can be appropriately changed. As a result, the value of the characteristic impedance of the two-way distribution transformer and the matching transformer formed on the core member changes, and the transmission characteristics of the two-way distributor can be changed. As a result, the two-way splitter of the present invention can obtain excellent transmission characteristics over a wide band for high-frequency signals.

The fourth feature of the present invention is that the core member comprises a core body and another auxiliary core stacked on the center of the core body, and the central part of the core body forming a two-way transformer. And the width and thickness of the auxiliary core and the width and thickness of the periphery of the core body forming the two matching transformers are appropriately changed. As a result, the value of the characteristic impedance of the two-way distribution transformer and the matching transformer formed on the core member changes, and the transmission characteristics of the two-way distributor can be changed. As a result, the two-way splitter of the present invention can obtain excellent transmission characteristics over a wide band for high-frequency signals.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to specific embodiments. FIG. 1 is a plan view showing a two-way distributor 100 according to the present invention, and FIG. 2 is a rear view of FIG. 3 shows a core member 10 constituting the two distributor 100 of FIG. 1. FIG. 3 (A) is a plan view, and FIG. 3 (B) is a longitudinal sectional view of FIG. 3 (A). FIG. 4 is a diagram showing two components constituting the two divider 100 shown in FIG.
FIG. 4A is a connection diagram of a distribution transformer and one of two matching transformers, FIG. 4A is a connection diagram of a two distribution transformer, and FIG. 4B is a connection diagram of a matching transformer.
Incidentally, the matching transformer is constituted by a single-turn transformer.
Hereinafter, in the matching transformer, a winding between the input terminal side and the output terminal side is referred to as a series winding, and a winding between the output terminal side and the ground terminal side is referred to as a common winding. The winding ratio is described as the ratio between the series winding and the common winding. Also, 1t, 3 in the figure
t indicates that the number of turns (the number of turns) of the winding is 1, 3 respectively. Hereinafter, components having the same configuration are denoted by the same reference numerals, and redundant description is omitted.

[0014] 2 distributor 100 is two distribution transformers DT, respectively matching transformer AT 1 to the left and right is a peripheral _unit, AT ₂ is distributor of the distributing and aligning integral formed in a central portion of the core member 10. The second distribution transformer DT, two winding number 1 of windings W _11, W ₁₂ is wound, the two windings W _11, one terminal of the W ₁₂ is crowded securely twisted to fill the core member 10 Input Terminal IN is pulled out. And the above 2
The other terminals of the two windings W ₁₁ and W ₁₂ are respectively connected to distribution terminals D
_1, and D _2. Further, the matching transformer AT _1, AT _2, common windings W ₂₂ of the series winding W ₂₁ and the winding number 3 of the winding number 1 is wound. The one terminal of the series winding W ₂₁ is the input terminal I _1, I _2, its input terminal I _1, I ₂ and the distribution terminal D _1, D ₂ and are connected respectively. In practice, the windings W ₁₁ and W ₁₂ and the series windings W ₂₁ are continuously connected to the core member 10.
It is wound in the hole described later. And matching transformer AT
_1, AT ₂ from the one terminal of the other terminal of the series winding W ₂₁ and the common winding W ₂₂ is connected to output terminals O
UT1 and OUT2 are extracted. Furthermore, the other terminal of the common winding W ₂₂ is led out as an earth terminal E _1, E _2, respectively. The two distributor 100 above the impedance matching between the series winding W ₂₁ winding ratio of 1: 3 by the input terminal IN and the output terminal OUT1, OUT2 of the common winding W ₂₂ is achieved.

In the two-way distributor constituted by the core member 10, the two windings W ₁₁ and W of the two-way transformer DT are used.
The lengths of the series winding W ₂₁ and the common winding W ₂₂ of the _twelve or two matching transformers AT _{1 and} AT ₂ can be changed by the thickness of the core member 10. In the two distributor composed of the core member 10, for example, the outer dimensions of the core member 10 are L ₁ = 16 mm, L
_{2 = 6mm, L 4 = 4mm} , and L ₅ = 4 mm, the hole diameter H ₁ = φ1mm,
2 divider was H ₂ = 1.2 mm, showing the transmission characteristics in the case where the width L ₃ of the central portion is the remaining outer dimension of the core member 10 is changed from 2mm~6mm in FIG. FIG. 5A shows distribution loss characteristics in the frequency band (10.00 MHz to 2000.00 MHz), and FIG. 5B shows coupling loss characteristics between terminals in the frequency band (10.00 MHz to 2000.00 MHz).

As is apparent from the drawing, the two-way distributor constituted by the core member 10 has an outer dimension L ₃ of 2 m.
Even if it is changed to m to 6 mm, the distribution loss characteristic of the transmission characteristic changes within the hatched area and is kept substantially constant. However, the inter-terminal coupling loss characteristic of the transmission characteristic central portion width L ₃ of the change 2mm~6mm core member 10 has changed significantly. In this case, the desired frequency band (10.0
(0 MHz to 2000.00 MHz), it is possible to obtain the best transmission characteristics when L 3 is around ₃ mm. That is, the transmission characteristic of the two divider using this core member 10 is made of the best thing when smaller than the width L ₄ of the peripheral portion of the width L ₃ of the central portion of the core member 10. As described above, the value of the characteristic impedance of the two distribution transformer or the matching transformer formed on the core member 10 changes, and the transmission characteristics of the two divider can be changed. The widths of the central portion and the peripheral portion of the core member 10 are determined by comparing the transmission characteristics experimentally measured as described above. As a result, the two-way divider of the present invention can have excellent transmission characteristics over a wide band with respect to a high-frequency signal.

FIG. 6 shows the shape of another core member 20 for constituting the two distributor according to the present invention. FIG. 6 (A) is a plan view and FIG. 6 (B) is a bottom view. The core member 20, similar to the above-described embodiment, two holes H ₁ is disposed at the central portion. Using these two holes H ₁ 2 distribution transformer DT is formed. Further, the core member 20, two holes H ₂ in a straight line at regular intervals for each of the two holes H ₁ are disposed respectively. These two holes H ₂
The utilizing two matched transformer AT _1, AT ₂ is formed. Here, the thickness and width of the central part of the core member 20 where the two-distribution transformer DT is formed and the two matching transformers AT1 _,
The thickness and width of the peripheral portion of the core member 20 on which the AT ₂ is formed are different. For example, in FIG. 6, the thickness of the peripheral portion of the core member 20 is smaller than the thickness of the central portion, and the width of the peripheral portion is smaller than the width of the central portion.

In the two-way distributor constituted by the core member 20, the two windings W ₁₁ and W of the two-way transformer DT are used.
The length of the series winding W ₂₁ and the common winding W ₂₂ of the _twelve or two matching transformers AT _{1 and} AT ₂ can be appropriately changed depending on the thickness of the central part and the peripheral part of the core member 20. Then, the width of the central portion and the width of the peripheral portion of the core member 20 are appropriately changed with respect to the predetermined thickness of the central portion and the peripheral portion of the core member 20. Then, as described above, the value of the characteristic impedance of the two-way distribution transformer and the matching transformer formed on the core member 20 changes, and the transmission characteristics of the two-way distributor can be changed. Note that the thickness and width dimensions of the central portion and the peripheral portion of the core member 20 and their magnitude relation are determined by comparing and examining experimentally measured transmission characteristics. As a result, the two-way divider of the present invention can have excellent transmission characteristics over a wide band with respect to a high-frequency signal.

FIG. 7 shows the shape of another core member 30 for constituting the two distributor according to the present invention. FIG. 7 (A) is a plan view, FIG. 7 (B) is a bottom view, and FIG. ) Is a right side view.
FIG. 8 shows a core body 31 forming the core member 30 of FIG.
8 (A) is a plan view, and FIG. 8 (B) is a longitudinal sectional view of FIG. 8 (A). FIG. 9 shows an auxiliary core 32 fitted and stacked in the center of the core body 31 of FIG.
9 is a plan view, and FIG. 9B is a longitudinal sectional view of FIG. 9A.

The core member 30 of the two-way distributor according to the present invention comprises a core body 31 and another auxiliary core 32 fitted and stacked on the recess 31a. The core body 31 has a concave portion 31a formed such that the width of the central portion is wider than the width of the peripheral portion and the thickness of the central portion is smaller than the thickness of the peripheral portion. Each of the peripheral portion and the two holes H ₁₁ and the two holes H ₁₂ are opened in the recess 31a of the central portion. The auxiliary core 32 is formed to have a fitting dimension in the left-right direction by a concave portion 31a at the center of the core body 31.
The auxiliary core 32 has a recess 31 a of the core body 31.
When the core body 31
One of the two holes H ₂₁ as well H ₁₁ and the hole positions match is opened. The thickness of the auxiliary cores 32 stacked in the recesses 31a of the core body 31 is
Is configured to have the same thickness as that of the peripheral portion.

As described above, the thickness of the central portion wider than the peripheral portion of the core member 30 is composed of the thickness of the central portion of the core body 31 and the thickness of the auxiliary core 32. Then, as described above, the value of the characteristic impedance of the two-way distribution transformer and the matching transformer formed on the core member 30 changes, and the transmission characteristics of the two-way distributor can be changed. The thickness and width of the central and peripheral portions of the core body 31 and the thickness and width of the auxiliary core 32 are determined by comparing experimentally measured transmission characteristics as described above. As a result, the splitter using the core member 30 can be configured as a splitter / matching integrated splitter having excellent transmission characteristics over a wide band for a high-frequency signal. By using the core member 30 having different magnetic permeability between the core body 31 and the auxiliary core 32, the transmission characteristics can be improved as in the case of changing the width or the thickness described above.

FIG. 10 shows the shape of another core member 40 for constituting the two distributor according to the present invention. FIG. 10 (A) is a plan view, FIG. 10 (B) is a bottom view, and FIG. ) Is a right side view. 11 shows a core main body 41 forming the core member 40 of FIG. 10, FIG. 11 (A) is a plan view, and FIG. 11 (B) is a longitudinal sectional view of FIG. 11 (A). FIG. 12 shows an auxiliary core 4 fitted and stacked in the center of the core body 41 of FIG.
12 (A) is a plan view, and FIG. 12 (B) is FIG. 12 (A).
FIG.

The core member 40 of the two-way distributor according to the present invention comprises a core body 41 and another auxiliary core 42 fitted and stacked on the recess 41a. The core body 41 has a concave portion 41a formed such that the width of the central portion is wider than the width of the peripheral portion and the thickness of the central portion is smaller than the thickness of the peripheral portion. Each of the peripheral portion and the two holes H ₁₁ and the two holes H ₁₂ are opened in the recess 41a of the central portion. The auxiliary core 42 is formed so as to have a fitting dimension in the left-right direction by a concave portion 41a at the center of the core body 41.
The auxiliary core 42 has a recess 41 a of the core body 41.
When the core body 41 is
One of the two holes H ₂₁ as well H ₁₁ and the hole positions match is opened.

As described above, the thickness of the central portion, which is wider than the peripheral portion of the core member 40, is composed of the thickness of the central portion of the core body 41 and the thickness of the auxiliary core 42. It is set by setting the thickness. Then, the thickness of the central portion of the core member 40 can be set irrespective of the thickness of the core member 41 with respect to the peripheral portion. That is, the width and thickness relationship between the central portion and the peripheral portion of the core member 40 can be set so as to mainly improve the transmission characteristics without being affected by the manufacturing process of the core body 41 and the like as described above. Become. Then, the value of the characteristic impedance of the two-distribution transformer or the matching transformer formed on the core member 40 changes,
The transmission characteristics in the distributor can be changed.
The center and peripheral portions of the core body 41 and the auxiliary core 42
The width and thickness dimensions are determined by comparing transmission characteristics experimentally measured in the same manner as described above. As a result, the core member 40
Can be configured as an integrated distributor / matching distributor having excellent transmission characteristics over a wide band for high-frequency signals. In addition, by using the core member 40 in which the magnetic permeability of the core main body 41 and that of the auxiliary core 42 are different, the transmission characteristics can be improved as in the case of changing the width or the thickness described above.

[Brief description of the drawings]

FIG. 1 is a plan view showing a two divider according to a specific embodiment of the present invention.

FIG. 2 is a rear view of FIG.

FIG. 3 is a drawing showing a core member constituting the two distributor according to the embodiment.

FIG. 4 is a connection diagram of a two-distribution transformer and one of two matching transformers constituting the two-divider according to the embodiment.

FIG. 5 is a characteristic diagram showing transmission characteristics obtained by changing the width of the central portion of the core member in the two distributor according to the embodiment.

FIG. 6 is a view showing a second embodiment of a core member constituting a two-way distributor according to the present invention.

FIG. 7 is a view showing a third embodiment of a core member constituting a two-way distributor according to the present invention.

FIG. 8 is a view showing a core body forming the core member of FIG. 7;

FIG. 9 is a view showing auxiliary cores that are fitted and stacked at the center of the core body of FIG. 8;

FIG. 10 is a view showing a fourth embodiment of a core member constituting a two-way distributor according to the present invention.

FIG. 11 is a view showing a core body forming the core member of FIG. 10;

FIG. 12 is a view showing auxiliary cores fitted and stacked in the center of the core body of FIG. 11;

[Explanation of symbols]

10- core member 11 core body DT-2 distribution transformer W _11, W ₁₂ - winding IN-
Input terminals D _1, D ₂ - distribution terminal AT _1, AT ₂ - matching transformer W ₂₁ - series winding W ₂₂ - common winding I _1, I ₂ - input terminal OUT1, OUT2- output terminals E _1, E ₂ - Ground terminal 100-2 distributor

Claims (4)

(57) [Claims] 1. An input signal formed at a central portion of a core member for dividing an input signal from an input terminal into two and outputting the signal to each distribution terminal.
A distribution transformer, is formed at the periphery of the core member, then each of the distribution terminal of the second distribution transformers
A two-distribution / matching integrated two-distributor comprising two matching transformers for converting impedance formed by one continuous winding and a center of the core member forming the two-distribution transformer 2. The two-way distributor according to claim 1, wherein a width of the portion is different from a width of a peripheral portion of the core member forming the two matching transformers. 2. An input signal, which is formed at the center of the core member and divides an input signal from an input terminal into two equal parts and outputs the signal to each distribution terminal.
A distribution transformer, is formed at the periphery of the core member, then each of the distribution terminal of the second distribution transformers
A two-distribution / matching integrated two-distributor comprising two matching transformers for converting impedance formed by one continuous winding and a center of the core member forming the two-distribution transformer 2. The two-way distributor according to claim 1, wherein a width and a thickness of the portion are different from a width and a thickness of a peripheral portion of the core member forming the two matching transformers. 3. An input signal formed at a central portion of the core member, which divides an input signal from an input terminal into two equal parts and outputs the signal to each distribution terminal.
A distribution transformer, is formed at the periphery of the core member, then each of the distribution terminal of the second distribution transformers
A distribution-matching integrated two-divider comprising two matching transformers for converting impedance formed by a single continuous winding , wherein the core member includes a core body and a core body; A center portion of the core body forming the two-distribution transformer, a width of the auxiliary core, and a width of a peripheral portion of the core body forming the two matching transformers. Are different from each other. 4. An input signal formed at a central portion of the core member, which divides an input signal from an input terminal into two and outputs the signal to each distribution terminal.
A distribution transformer, is formed at the periphery of the core member, then each of the distribution terminal of the second distribution transformers
A distribution-matching integrated two-divider comprising two matching transformers for converting impedance formed by a single continuous winding , wherein the core member includes a core body and a core body; A central portion of the core body forming the two-distribution transformer, and a width and thickness of the auxiliary core and a peripheral portion of the core body forming the two matching transformers. A two-way distributor having different widths and thicknesses.