JPH08237012A - Directional coupler - Google Patents

Abstract

PURPOSE: To make the directional coupler small in size by using one of coil conductors for a main line and the other fair a sub-line. CONSTITUTION: External electrodes 2c, 2d being main and sub-lines are provided independently to a side face of a 1st ground conductor electrode board 2. A board 3 for the main line is formed with a strip line electrode 3a and a throughhole use round electrode 3e. One terminal of the strip line electrode 3a is connected to an external electrode 3c. Independent external electrodes 3b-3d are provided to the side face. Furthermore, one end of a strip line electrode 4a of a board 4 for the main line connects to an external electrode 4c and the other end connects to a throughhole round electrode 3e of the strip line board 3 with a throughhole 4f. The strip line electrodes 3a, 4a are connected together to form a coil with two turns. Furthermore, the sub-line use strip line electrode boards 5, 6 are configured similarly to the electrode boards 3, 4, the strip line electrodes 5a, 6a are connected by a throughhole 6f and a round electrode 5e to form a coil with two turns.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a directional coupler using a coiled conductor.

[0002]

2. Description of the Related Art A perspective view of a conventional directional coupler using a plurality of strip lines is shown in FIG. In this conventional example, the case where the main line and the sub line are formed on the same substrate and of the same plane type is shown. This is because the two strip lines 5 are formed on the front surface of the dielectric substrate 51 having the planar ground conductor 52 formed on the back surface.
3, 54 are arranged in parallel with a space S therebetween. The lengths of the parallel portions of the strip lines 53 and 54 are each set to be a quarter wavelength. The high frequency power input from the port P1 passes through the strip line 53, which is the main line, and is output to the port P2. At this time, the strip line 53 which is the main line
And the strip line 54 which is a sub line,
Part of the electric power passing through the strip line 53 flows to the strip line 54 and is output to the port P3. At this time, no output appears at the port P4. Next, in the opposite direction of the strip line 53 which is the main line, that is, the port P2
When power is supplied from the port P1 to the port P1, a part of the power appears at the port P4 and does not appear at the port P3.
That is, with such a configuration, part of the forward power and the backward power flowing through the strip line 53 of the main line is separated and taken out to the output port P3 or P4 terminal of the strip line 54 of the sub line. be able to. This is the basic operation of the directional coupler. The coupling from the main line 53 to the sub line 54 is possible by adjusting the distance S between the parallel portions of the two strip lines. In the description of the conventional example of FIG. 4, the main line and the sub line are strip lines 53 and 54, but it is the same even if the roles of the main line and the sub line are exchanged, as is clear from the symmetrical structure of FIG. In addition, the basic operation of the directional coupler can be realized. FIG. 5 shows another conventional example in which a strip line 65 which is a main line and a strip line 66 which is a sub line are laminated. This is a flat ground conductor 6 on the back surface.
A strip line 66, which is a sub-line, is arranged on the surface of the dielectric substrate 61 on which 4 is formed. A dielectric substrate 6 having a stripline 65, which is a main line, formed above the dielectric substrate 6.
2 are arranged in parallel at a distance D. A dielectric substrate 63 for protection is provided thereon. FIG. 6 shows a perspective view of a directional coupler completed by laminating and firing these three substrates and adding external terminals. Also in this case, the same operation as in FIG. 4 can be realized, and the high frequency power input from the port P1 passes through the strip line 65 which is the main line and is output to the port P2. At this time, due to the coupling of the strip line 65, which is the main line, and the strip line 66, which is the sub line, part of the electric power passing through the strip line 65 flows to the strip line 66 and is output to the port P3. At this time, no output appears at the port P4. Next, when electric power is supplied in the opposite direction of the strip line 65, which is the main line, that is, from the port P2 to the port P1, a part of the electric power appears at the port P4 and does not appear at the port P3. That is, with such a configuration, part of the forward power and the backward power flowing through the strip line 65 of the main line is separated and taken out to the output port P3 or P4 terminal of the strip line 66 of the sub line. be able to. The coupling from the main line 65 to the sub line 66 is performed by the distance between the parallel portions of the two strip lines in the stacking direction, that is, the thickness D of the dielectric substrate 62.
It is possible by adjusting The directional coupler having a function of separating a part of the high-frequency power by giving a directivity in this way is used for controlling the transmission power of a transmitter of a microwave communication, for example, a mobile phone. FIG. 7 shows a block diagram of the application example. The ports P1 and P2 of the main line of the directional coupler 71 are arranged between the transmission power amplifier and the antenna 74, one port P3 of the sub line is connected to the automatic gain control circuit, and the power is supplied to the other port P4. The absorbing resistance element 75 is connected. In this case, only a part of the output of the transmission power amplifier appears at the port P3 and is guided to the automatic gain control circuit. A part of the high frequency power flowing back from the antenna 74 appears at the port P4 and is absorbed by the resistance element 75. The signal output of the automatic gain control circuit is sent to a transmission power amplifier capable of controlling the gain, and the high-frequency output can be controlled according to the purpose.

[0003]

However, miniaturization of mobile phones and the like has become an important issue.
The directional coupler used for the above purpose is also required to be further downsized. In the 1/4 wavelength directional coupler as in the example of the prior art shown in FIG. 4, the length of the stripline electrode is 2.5 cm at 1 GHz (1/4 of the relative permittivity ε = 9). wavelength)
Is required, and sufficient miniaturization cannot be expected. It is also possible to use a material with a large relative permittivity to shorten the quarter wavelength, but in order to maintain an impedance of 50Ω, the stripline width becomes extremely thin and the main line and the sub-line are desired. In order to obtain the above-mentioned connection, the interval between the strip lines becomes extremely narrow and high processing accuracy is required. Therefore, there is a problem that mass productivity is poor and power resistance is also deteriorated. Further, in the structure in which a plurality of strip lines are vertically stacked as shown in FIG. 5 of the prior art, since the two lines are coupled on a plane, the control range is wide, but the situation is small in terms of size reduction. There is no difference from the above example. One way to reduce the size is to shorten the line length to less than 1/4 wavelength. The characteristics of the directional coupler of FIG. 5 manufactured as described above are shown by the dotted line in FIG. Here, the propagation loss from the port P1 to the port P2 is called insertion loss, the propagation loss from the port P1 to the port P3 is called coupling loss, and the propagation loss from the port P1 to the port P4 is called isolation. The directional coupler is required to have insertion loss as small as possible and isolation as large as possible. Coupling loss is a parameter given in designing the entire circuit of a mobile phone or the like. As can be seen from the dotted line in FIG. 5, simply shortening the line length using the conventional technique has a drawback that a sufficiently high isolation cannot be realized in a wide frequency range. In view of the above, it is an object of the present invention to provide a miniaturized directional coupler.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a plurality of ground conductors having a spread are formed, and two coiled conductors each wound one or more times are formed in a region surrounded by the plurality of ground conductors. The directional coupler uses one of the coil-shaped conductors as a main line and the other as a sub-line. Further, the present invention is a directional coupler configured by laminating dielectric layers having a conductor film formed thereon, wherein each coil is wound one or more times in a region surrounded by a plurality of ground conductors. 2 shaped conductors
This is a directional coupler that is formed and uses one of the coil-shaped conductors as a main line and the other as a sub-line. In the present invention, the dielectric constant of the dielectric layer is 15 or less,
It is made of a material having a sintering temperature of 1000 ° C. or less.
Further, according to the present invention, the coil-shaped conductor is formed by connecting conductors formed on two or more dielectric layers with through holes, and one of the coil conductors is formed on each layer. It is a thing. Further, according to the present invention, the two coil-shaped conductors are formed side by side in different regions on each dielectric layer. In the present invention, the input terminal and the output terminal of the main line are formed on the same surface of the laminated body, the input terminal and the output terminal of the sub-line are formed on the same surface of the laminated body, and The surface on which the input terminal and the output terminal are formed is different from the surface on which the input terminal and the output terminal of the sub-line are formed, which are respectively opposite surfaces of the laminated body, and are the input terminals of the main line. And / or an output terminal and / or between the input terminal and the output terminal of the sub line, the terminal of the ground conductor is formed. Further, the present invention is a directional coupler configured by laminating dielectric layers having a conductor film formed thereon, wherein each coil is wound one or more times in a region surrounded by a plurality of ground conductors. 2 shaped conductors
This is a directional coupler that is formed in this way, and when the coiled conductor is viewed from the axial direction of the winding direction of the coiled conductor, the entire contours of the wound conductors overlap. Further, the invention is a directional coupler configured by laminating dielectric layers having conductor films formed thereon, wherein each coil is wound one or more times in a region surrounded by a plurality of ground conductors. A directional coupler in which two conductors are formed, and when the coiled conductor is viewed from the axial direction of the winding direction of the coiled conductor, the portion surrounded by the wound conductor is displaced. is there. Further, the present invention is a directional coupler configured by laminating dielectric layers having a conductor film formed thereon, wherein each coil is wound one or more times in a region surrounded by a plurality of ground conductors. Two conductors are formed and the width of the conductor is 0.10.
The directional coupler is ~ 0.20 mm.

[0005]

The structure of the present invention, that is, a plurality of ground conductors having a spread, and two coil-shaped conductors wound one or more times are provided in an area surrounded by the plurality of ground conductors. By coupling with the coiled conductor of, it is possible to realize a small-sized and high-performance directional coupler. In addition, a directional coupler having a small size and high mass productivity can be realized by stacking the dielectric layers having the conductor film formed thereon. Also, the dielectric constant of the dielectric layer is 15 or less, and the sintering temperature is 1000.
By using a material having a temperature of ℃ or less, simultaneous firing using a conductor such as Ag or Cu is possible. The coil-shaped conductor is formed by connecting conductors formed on two or more dielectric layers with through holes, and only one coil conductor is formed on each layer. It is possible to realize a very small directional coupler with high coupling. Further, since the two coil-shaped conductors are formed side by side in different regions on each dielectric layer, the degree of coupling can be adjusted. Further, the input terminal and the output terminal of the main line are formed on the same surface of the laminated body, the input terminal and the output terminal of the sub-line are formed on the same surface of the laminated body, and the input terminal and the output terminal of the main line are formed. And the surface on which the input terminal and the output terminal of the sub-line are formed are different and are the surfaces that face each other of the laminated body, and between the input terminal and the output terminal of the main line and / or the sub-line. Since the ground conductor terminal is formed between the input terminal and the output terminal of the line, the mountability is high. Also, when the two coiled conductors are viewed from the axial direction of the winding direction of the coiled conductor, the entire contours of the wound conductors overlap, so that the main line It is possible to enhance the connectivity of the sub line with. Further, when the two coiled conductors are seen from the axial direction of the winding direction of the coiled conductors, the portions surrounded by the coiled conductors are displaced from each other, so that the coupling property is improved. Can be adjusted. In addition, the width of the conductor of the coil-shaped conductor is 0.10 to
By setting it to 0.20 mm, a high performance directional coupler can be realized.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows an assembly component diagram of one embodiment according to the present invention. Further, a completed product obtained by assembling the above-mentioned components according to one embodiment of the present invention is a chip-type directional coupler 1.
FIG. 2 shows a perspective view thereof. A chip type directional coupler 1 according to an embodiment of the present invention includes a first ground conductor electrode substrate 2
And strip line electrode substrates 3 and 4 for the main line, strip line electrode substrates 5 and 6 for the sub line, a second ground conductor electrode substrate 7, and a protection substrate 8 are laminated. . For each of these substrates, a ceramic green sheet for low temperature sintering is used. The ground conductor electrode 2a is formed on one surface of the first ground conductor electrode substrate 2 except for a little end on the ceramic green sheet. Two projections are provided at the center end of the ground conductor electrode 2a, and are connected to the two external electrodes 2b on the side surfaces. External electrodes 2c and 2d serving as a main line and a sub line are independently provided on the side surface. The main line substrate 3 has stripline electrodes 3a and through-hole round electrodes 3e formed on one surface of a ceramic green sheet. One end of the strip line electrode 3a is connected to the external electrode 3c. Independent external electrodes 3b, 3c and 3d are provided on the side surfaces. There is another substrate for the main line, indicated by 4 in the figure. This has a strip line electrode 4a and a through hole 4f formed on one surface of a ceramic green sheet. One end of the strip line electrode 4a is connected to the external electrode 4c, and the other end is connected to a through hole round electrode 3e of the strip line substrate 3 through a through hole 4f. The strip line electrodes 3a, 4a are connected to form a two-turn coil. On the side surface of the substrate 4, independent external electrodes 4b, 4c, and 4d are provided. The strip line electrode substrates 5 and 6 for sub-lines have the same configuration as the strip line electrode substrates 3 and 4 for main lines, and the strip line electrodes 5a and 6a are connected by through holes 6f and round electrodes 5e, It has a two-turn coil configuration. Strip line electrode 5a,
The ends of 6a are connected to the external electrodes 5d and 6d on the side surfaces, respectively. External electrodes 5b, 5c, 5d, 6b, 6c and 6d, which are independent of each other, are provided on the side surfaces of the substrates 5 and 6, respectively. The second ground conductor electrode substrate 7 has the same configuration as the first ground conductor electrode substrate 8, and the ground conductor electrode 7a is formed on one surface of the ceramic green sheet with a little left end. These first ground conductor electrode 2a and second ground conductor electrode 7a are connected to external terminals 2b, 3b, 4b, 5b, 6b, 7b.
And strip line electrodes 3a,
4a, 5a and 6a. This achieves a shielding effect that prevents high-frequency power from leaking to the outside. The protection substrate 8 is provided with independent external electrodes 8b, 8c, 8e on the side and top surfaces of the green sheet. Each of the green sheets 2 to 8 is stacked after each electrode film is formed by a printing technique, and is baked at a temperature of 900 ° C. or more to be integrated. As a result, the directional coupler 1 shown in FIG. 2 is completed. The external electrodes b, c and d provided on the side surface of each green sheet are integrated after firing.
The external electrodes B, C, and D connected to each other are completed as shown in FIG. In this embodiment, the method of providing the external electrodes b, c, and d on the side surfaces at the stage of the green sheet has been described. However, after firing the laminate of the green sheets, the external electrodes B, C,
Even if D is manufactured, a high frequency component having a similar structure can be realized. The ceramic green sheet of this example was a dielectric material having a relative dielectric constant ε = 8 and capable of being fired at 900 ° C., and had a thickness of 0.15 mm. Each electrode has a thickness of 1
The Cu electrode was 5 μm, and the width of the strip line electrode was 0.16 mm. The external dimensions of the chip-type directional coupler completed by stacking and firing integrally are 3.2 x 1.6 x 1.2.
It was t (mm). As is apparent from FIGS. 1 and 2 of this embodiment, it is understood that the external electrode B corresponds to the ground conductor, the external electrode C corresponds to the main line, and the external electrode D corresponds to the sub line. The result of measuring the characteristics of the directional coupler manufactured in this example over a wide frequency range from 0.5 GHz to 2 GHz is shown by the solid line in FIG. As is clear from comparison with the dotted line of the prior art, it can be seen that the directional coupler using the technology of the present invention is extremely excellent in terms of insertion loss and isolation. For example, when the technique of the present invention is compared with the conventional technique in the 1.5 GHz band, the insertion loss is 0.3 dB.
And 0.5 dB, isolation 48 dB and 23 dB
There is a difference. Especially, the insertion loss is 1.9G at higher frequency.
In the Hz band, a large difference appears between 0.4 dB and 1.0 dB. Although there is a difference of about 2 dB in the coupling loss, this is a matter given by design and is not a direct object of comparison when discussing performance. The main point of the present invention is not the U-shaped stripline which is based on the distributed constant type line as in the prior art shown in FIGS. 4 and 5, but is the same as the lumped constant circuit component as shown in FIG. It is a coiled conductor wound more than once. 2 such coiled conductors
By using this method, it is possible to achieve high performance in a wider frequency range by coil-coupling a plurality of strip lines, which are originally distributed constant type lines, with each other. Therefore, the weight of the coiled conductors is important.
In the present embodiment, therefore, the strip line electrode 3f,
4f, 5f, and 6f are formed so as to overlap substantially on the same line except for the lead-out portion to the external electrode. A plan view of the stripline electrode substrate 6 of this embodiment is shown in FIG.
(A). The outline of the coil-shaped conductor composed of the strip line 6a on the strip line electrode substrate 6 and the strip line electrode 5a connected thereto is shown in FIG. 9 (b).
And the contour of the other coil-shaped conductor is the same, and when viewed from the axial direction of the winding direction of the coil-shaped conductor (the direction perpendicular to the paper surface of FIG. 9), the two coil-shaped The entire conductor outline overlaps. This allows
It has a high bondability. Further, in the embodiment of the present invention, a coiled conductor having an elongated cross section was used, and the long axis was arranged parallel to the ground conductor. By doing so, the mounting density in the vertical direction was increased, and a strong coupling between the main line and the multiple lines could be realized. Moreover, the directional coupler was created by changing the conductor width of the coiled conductor. As the conductor width becomes wider, the return loss characteristic deteriorates and the practicality is lost. The conductor width is preferably 0.20 mm or less. On the other hand, if the conductor width is reduced,
The characteristics are good in terms of characteristics such as insertion loss, isolation, and return loss, but if it is too narrow, the power withstanding characteristic deteriorates and the practicality decreases, so 0.10 mm or more is desirable. Incidentally, one strip line of the present invention, both ends of the strip line is connected to the external electrode,
A structure having two ports. The basic structure of the present invention is that the plurality of strip lines are included in a region surrounded by a plurality of ground conductors. In the present embodiment, the two strip lines were connected to independent external electrodes, but in some cases, the effect of the present invention does not change even if a plurality of strip lines share one external electrode. . Furthermore, although the non-magnetic dielectric substrate is described in the embodiments of the present invention, it is easy for a person skilled in the art to realize the effects of the present invention even if a magnetic substrate is used as the substrate. Understandable. In particular, the main point of the present invention is
A plurality of strip lines are coil-coupled in a space surrounded by a ground conductor, and the effect is further enhanced if the substrate is a magnetic body. Further, in the above-described embodiment, the total length of the main line formed of the stripline electrodes 3a and 4b and the total length of the sub line formed of the stripline electrodes 5a and 6b are set to a length corresponding to 1/12 wavelength. As described above, according to the embodiment of the present invention, the directional coupler which has conventionally been designed with the strip line length of ¼ wavelength is
It is obvious that a directional coupler is designed and a directional coupler is achieved, and a significant miniaturization is possible. Further, according to the configuration of the present invention, it was confirmed that the entire length of the stripline electrode was designed in the range of 1/8 to 1/15 wavelength, and that a directional coupler was achieved. This is because the coiled strip line is wound one or more times like the lumped constant circuit component as described above. FIG. 8 shows an assembly component diagram of another embodiment according to the present invention. This FIG. 8 constitutes a chip type directional coupler, and includes a first ground conductor electrode substrate 22, and substrates 23 and 24 on which stripline electrodes for main lines and stripline electrodes for sub lines are formed. And a second ground conductor electrode substrate 25 and a protective substrate 26 are laminated. For each of these substrates, a ceramic green sheet for low temperature sintering is used. The first ground conductor electrode substrate 22 has a ground conductor electrode 22a formed on one surface of the ceramic green sheet with a little left end.
Two projections are provided at the center end of the ground conductor electrode 22a and are connected to the side surfaces. The substrate 23 on which the stripline electrodes for the main line and the subline are formed has a stripline electrode 23a for the mainline and a stripline electrode 23b for the subline on one surface of the ceramic green sheet.
Are formed. Each stripline electrode 2
One end of each of 3a and 23b is drawn out to the side surface, and through-hole round electrodes 27a and 27b are formed at the other end. There is another substrate for the main line and the sub-line, which is indicated by 24 in the figure. The main line strip line electrode 24a and the sub line strip line electrode 24b are formed on one surface of the ceramic green sheet. One end of each stripline electrode 24a, 24b is drawn out to the side surface, and the other end has a through-hole electrode 28a,
28b is formed. Second ground conductor electrode substrate 25
Has the same configuration as that of the first ground conductor electrode substrate 22, and the ground conductor electrode 25a is formed on one surface of the ceramic green sheet with a little left end. The protective substrate 26 includes external electrodes 26a, 26
b, 26c, 26d, 26e and 26f are provided. External terminals for the input / output of the main line, the input / output of the sub line, and the ground conductor are formed on the side surface of the laminated body. In this embodiment, the conductors for the main line and the sub line are formed side by side in different regions on one green sheet. FIG. 10 shows an assembled component diagram of another embodiment according to the present invention. This FIG. 10 constitutes a chip type directional coupler, and includes a first ground conductor electrode substrate 32, strip line electrode substrates 34 and 36 for main lines, and a strip line electrode substrate 33 for sub lines. 35, a second ground conductor electrode substrate 37, and a protective substrate 38 are laminated.
For each of these substrates, a ceramic green sheet for low temperature sintering is used. The first ground conductor electrode substrate 32
Has a ground conductor electrode 32a formed on the entire surface of the ceramic green sheet, leaving a little end. Two projections are provided at the central end of the ground conductor electrode 32a and are connected to the side surfaces. The substrate 33 on which the subline stripline electrode is formed has a subline stripline electrode 33a formed on one surface of the ceramic green sheet. One end of the strip line electrode 33a is drawn out to the side surface, and the through hole round electrode 33b is formed at the other end. The substrate 34 on which the stripline electrode for the main line is formed has a stripline electrode 34a for the main line on one surface of the ceramic green sheet.
A round electrode 34c for through holes, which is independent of the above, is formed. One end of the strip line electrode 34a is drawn to the side surface, and the other end of the through-hole round electrode 3a
4b is formed. There is another substrate for the sub line, which is indicated by 35 in the figure. In this, a through-hole round electrode 35c independent of the sub line strip line electrode 35a is formed on one surface of the ceramic green sheet. One end of the strip line electrode 35a is led out to the side surface, and the through hole electrode 35b is formed at the other end. There is another substrate for the main line, which is indicated by 36 in the figure. In this structure, a mainline stripline electrode 36a is formed on one surface of a ceramic green sheet. One end of the strip line electrode 36a is drawn out to the side surface, and the through hole electrode 36b is formed at the other end. The second ground conductor electrode substrate 37 has the same configuration as that of the first ground conductor electrode substrate 32, and the ground conductor electrode 37a is formed on one surface of the ceramic green sheet with some end portions left. The protective substrate 38 includes external electrodes 38a, 38b, 38c, 38 which are independent from each other on the upper surface of the green sheet.
d, 38e, 38f are provided. External terminals for the input / output of the main line, the input / output of the sub line, and the ground conductor are formed on the side surface of the laminated body. In this embodiment, the ceramic green sheets on which the stripline electrodes for the main line and the stripline electrodes for the sub-line are formed are alternately laminated, and the region where the coiled conductor for the main line is wound and the sub-line The wound region of the coil-shaped conductor for use in the coiled conductor is arranged so as to be displaced while overlapping the region when viewed in the axial direction of the winding direction. By alternately stacking the green sheets on which the main line stripline electrodes are formed and the green sheets on which the subline stripline electrodes are formed in this manner, the bondability can be enhanced. Of course, as in the embodiment shown in FIG. 1, the main line and the sub line may be divided into upper and lower parts. As described above, by using the technique of the present invention, it was possible to obtain a very small chip type directional coupler having a wide band and excellent high frequency characteristics.

[0007]

As described above in detail with reference to the embodiments, by using the technique of the present invention, a very small and high performance chip type directional coupler can be constructed. This is extremely useful for downsizing microwave parts for mobile phones and the like.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment according to the present invention.

FIG. 2 is a perspective view of an embodiment according to the present invention.

FIG. 3 is a characteristic comparison diagram of the present invention and the prior art.

FIG. 4 is a perspective view of a conventional technique.

FIG. 5 is an exploded perspective view of a conventional technique.

FIG. 6 is a perspective view of a conventional technique.

FIG. 7 is a circuit block diagram of a usage example of the directional coupler.

FIG. 8 is an exploded perspective view of another embodiment according to the present invention.

FIG. 9 is an explanatory diagram of the present invention.

FIG. 10 is an exploded perspective view of another embodiment according to the present invention.

[Explanation of symbols]

1 Directional coupler 2, 7, 22, 25, 32, 37 Ground conductor electrode substrate 3, 4, 5, 6, 23, 24, 33, 34, 35, 36
Strip line electrode substrate 8, 26, 38 Protective substrate 2a, 7a, 22a, 25a, 32a, 37a Ground conductor electrode 3a, 4a, 5a, 6a, 23a, 23b, 24a,
24b, 33a, 34a, 35a, 36a Strip line electrodes 3e, 5e, 27a, 27b, 33b, 34b Through-hole round electrodes 4f, 6f, 28a, 28b, 34c, 35b, 35
c, 36b through hole

Claims (9)

[Claims] 1. A plurality of ground conductors having a spread, and two coil-shaped conductors each wound one or more times are formed in a region surrounded by the plurality of ground conductors. A directional coupler characterized in that one is used as a main line and the other is used as a sub line. 2. A directional coupler configured by laminating dielectric layers having conductor films formed thereon, wherein each coil is wound one or more times in a region surrounded by a plurality of ground conductors. A directional coupler, in which two coiled conductors are formed, and one of the coiled conductors is used as a main line and the other is used as a sub line. 3. The directional coupler according to claim 2, wherein the dielectric layer has a dielectric constant of 15 or less and a sintering temperature of 1000 ° C. or less. 4. The coil-shaped conductor according to claim 2, wherein conductors formed on two or more dielectric layers are connected by through holes, and one coil conductor is provided on each layer. A directional coupler, wherein a directional coupler is formed. 5. The directional coupler according to claim 2, wherein the two coil-shaped conductors are formed side by side in different regions on each dielectric layer. 6. The input terminal and the output terminal of the main line are formed on the same surface of the laminated body according to claim 2, and the input terminal and the output terminal of the sub line are formed on the same surface of the laminated body, And the surface of the main line on which the input terminal and the output terminal are formed is different from the surface of the sub-line on which the input terminal and the output terminal are formed, each of which is a surface facing the laminated body, A directional coupler characterized in that a terminal of the ground conductor is formed between an input terminal and an output terminal of a main line and / or between an input terminal and an output terminal of the sub line. 7. A directional coupler configured by laminating dielectric layers having conductor films formed thereon, wherein each coil is wound one or more times in a region surrounded by a plurality of ground conductors. It is characterized in that two shaped conductors are formed, and when the coiled conductor is viewed from the axial direction of the winding direction of the coiled conductor, the entire contours of the wound conductors overlap. And a directional coupler. 8. A directional coupler configured by laminating dielectric layers having conductor films formed thereon, wherein each coil is wound one or more times in a region surrounded by a plurality of ground conductors. Two conductors are formed, and when the coiled conductor is viewed from the axial direction of the winding direction of the coiled conductor, the portion surrounded by the wound conductor is displaced. Directional coupler. 9. A directional coupler configured by laminating dielectric layers having conductor films formed thereon, wherein each coil is wound one or more times in a region surrounded by a plurality of ground conductors. Two conductors are formed, and the width of the conductor is 0.10 to
A directional coupler having a length of 0.20 mm.