JP4199395B2 - Multilayer Magic T - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a multilayer magic T using a multilayer dielectric waveguide line, which is mainly used as a branching part for transmitting and branching high-frequency signals such as microwaves and millimeter waves to configure a high-frequency circuit. It is about.
[0002]
[Prior art]
In recent years, research on technologies relating to elements for configuring circuits using high frequencies such as microwaves and millimeter waves has been actively promoted. There are various types of circuit components, and one of them is a kind of directional coupler called Magic T. This magic T is used for, for example, balanced phase detection, a mixer circuit, and the like.
[0003]
This conventional magic T has a four-terminal structure that combines an E-plane T branch and an H-plane T branch of a rectangular waveguide. FIG. 4 is a perspective view showing a configuration of a conventional magic T. In FIG. 4, a, b, c, and d denote waveguides, and a rectangular waveguide is usually used. Of these, the waveguides a, c, and d are waveguides whose H plane is parallel to the xy plane shown in the figure, and the waveguide b is a waveguide whose H plane is parallel to the xz plane. It is a tube.
[0004]
Here, the waveguides a, c, and d have an H-plane T-branch waveguide structure, and the waveguides b, c, and d have an E-plane T-branch waveguide structure. I am doing. Further, each of the waveguides a to d is adjusted so that the electromagnetic wave can propagate only in the TE ₁₀ mode single mode by adjusting the frequency and the size.
[0005]
The operation of the magic T having this structure will be briefly described. When excited from the waveguide a in the H-plane T branch, this electromagnetic wave can be coupled to the waveguides c and d, but not to the waveguide b. When excited from the waveguide b in the E-plane T branch, this electromagnetic wave can be coupled to the waveguides c and d, but cannot be coupled to the waveguide a. That is, the electromagnetic wave input from the waveguide a is branched only to the waveguides c · d, and the electromagnetic wave input from the waveguide b is branched only to the waveguides c · d. Moreover, the electromagnetic wave input from the waveguide a is branched in phase, whereas the electromagnetic wave input from the waveguide b is branched in reverse phase.
[0006]
For this magic T, a metal pole (bar) or a metal plate is placed inside the branch as an impedance matching unit in order to perform impedance matching at the branch where the two branches intersect. Is done.
[0007]
[Problems to be solved by the invention]
Since the conventional magic T having such a structure is a three-dimensional complicated structure using a rectangular waveguide, there is a problem that it is very difficult to process at the time of manufacture. That is, such a structure can be manufactured by cutting the waveguide portion from the metal block, but since three-dimensional cutting is not easy, it is usually divided into two or three portions. Produced. In this case, there has been a problem in that electromagnetic waves leak at the connecting portions of each portion, and transmission / branching characteristics are likely to deteriorate due to a shift in connection.
[0008]
Further, a matching metal pole or metal plate for impedance matching inserted and arranged in the branch portion is also provided along the line ABC in FIG. 4 so as not to disturb the symmetrical structure required for the magic T. It is required to have high symmetry with respect to the surface cut along, and a highly accurate processing technique is required. For this reason, it is difficult to stably obtain a product having good transmission / branching characteristics, and the productivity is low, resulting in a high manufacturing cost.
[0009]
In addition, when the frequency of the electromagnetic wave to be transmitted / branched is low, the dimension becomes large, and conversely, when the frequency becomes high like millimeter wave, the dimension of the waveguide becomes remarkably small. There was a problem that it became difficult.
[0010]
The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a magic T having a good transmission / branching characteristic with high accuracy and high stability and high productivity. It is in.
[0011]
[Means for Solving the Problems]
As a result of repeated studies to solve the above problems, the present inventor used a green sheet lamination technique for producing a ceramic semiconductor element storage package, a multilayer wiring board, and the like, instead of the conventional rectangular waveguide. As a result, it has been found that the magic T can be manufactured easily, accurately and inexpensively by using the horizontal and vertical laminated dielectric waveguide lines that can be manufactured in this way.
[0012]
That is, the laminated magic T of the present invention has an upper main conductor layer and a lower main conductor layer sandwiching the first dielectric substrate, and a signal wavelength between the upper main conductor layer and the lower main conductor layer in the high-frequency signal transmission direction. 2 side wall through conductor groups electrically connected at a repetitive interval of less than one half and a predetermined width, and by a region surrounded by the main conductor layers and the side wall through conductor groups. The first and second dielectric waveguide lines that transmit the high-frequency signal are provided, and the tip of the first dielectric waveguide line is provided on one side of the second dielectric waveguide line. And a predetermined upper opening is provided in the upper main conductor layer of the second dielectric waveguide line at the branching portion so that the transmission directions of the high-frequency signals are perpendicular to the side opening. Multiple dielectric layers for a T-shaped branched dielectric waveguide line A layered second dielectric substrate, and a conductor wall formed in the stacking direction in the second dielectric substrate around the upper opening and electrically connected to the upper main conductor layer at a predetermined interval The upper conductor portion formed between the through conductor group and the dielectric layer at an interval of less than half the signal wavelength of the high-frequency signal, and electrically connecting the conductor wall through conductor group between the dielectric layers. A vertical dielectric that includes a plurality of sub-conductor layers having openings of substantially the same size as the openings, and transmits the high-frequency signal by a region surrounded by the plurality of sub-conductor layers and the conductor wall through conductor group. A waveguide line is connected to the upper opening so that a transmission direction of a high-frequency signal is perpendicular to the first and second dielectric waveguide lines.
[0013]
The laminated magic T according to the present invention is characterized in that, in the above configuration, a matching unit comprising a through conductor and / or a conductor layer is provided at the branch portion of the T-shaped branch dielectric waveguide line. To do.
[0014]
[Action]
The laminated magic T of the present invention having such a configuration can be easily manufactured using a green sheet lamination technique. That is, it can be manufactured with sufficient accuracy and easily by performing through-hole processing, embedding conductor paste such as metallized ink, conductor pattern printing, laminating and firing on dielectric green sheets such as ceramic green sheets. A portion corresponding to a metal pole or a metal plate as an impedance matching device to be provided can be easily produced by forming a similar through hole and printing a conductor paste.
[0015]
In addition, by appropriately selecting the relative permittivity of the dielectric material such as the ceramic constituting the dielectric substrate and the dielectric layer, even when the frequency is low, the magic T using the conventional rectangular waveguide can be realized. Compared to this, the size can be greatly reduced.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the laminated magic T of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 is a perspective view showing a schematic configuration of an example of an embodiment of a laminated magic T of the present invention. In FIG. 1, a, b, c, and d are waveguides formed by laminated dielectric waveguide lines, and a, c, and d are horizontal dielectrics that form a T-shaped branched dielectric waveguide line. B is a vertical dielectric waveguide line connected above.
[0018]
Reference numeral 71 denotes a first dielectric substrate, 1 denotes an upper main conductor layer, and 2 denotes a lower main conductor layer. The pair of main conductor layers 1 and 2 hold the first dielectric substrate 71 from above and below. 3 is for two rows of side walls formed so as to electrically connect the main conductor layers 1 and 2 with a repetitive interval less than one half of the signal wavelength and a predetermined width in the transmission direction of an electromagnetic wave which is a high frequency signal. This is a through conductor group. Reference numeral 4 denotes a sub-conductor layer formed in parallel between the main conductor layers 1 and 2 and electrically connecting each of the two rows of through-hole conductor groups 3 for side walls. It is formed as needed. A lateral first dielectric waveguide line a and a second dielectric that transmit a high-frequency signal by a region surrounded by the main conductor layers 1 and 2 and the through-conductor group 3 for the side wall and the sub-conductor layer 4 are used. A waveguide line cd is formed. Then, the tip of the first dielectric waveguide line a is formed in a side opening formed on one side portion of the second dielectric waveguide line cd except for a predetermined side wall through conductor group. Are connected so that the transmission directions of the high-frequency signals are perpendicular to each other, thereby forming a T-shaped branched dielectric waveguide line. Furthermore, an upper opening 1a having a predetermined opening dimension is provided in the upper main conductor layer 1 of the second dielectric waveguide line cd at the branching portion.
[0019]
72 is a second dielectric substrate formed by laminating a plurality of dielectric layers, and 5 is formed in the second dielectric substrate 72 around the upper opening 1a in the laminating direction (z direction shown in the figure). A conductor wall through conductor group electrically connected to the upper main conductor layer 1 at a predetermined interval; 6 is an interval between the dielectric layers of the second dielectric substrate 72 that is less than a half of the signal wavelength of the high-frequency signal; And a plurality of sub-conductor layers each having an opening 6a having substantially the same size as the upper opening 1a and electrically connecting the conductor wall through conductor group 5 between the dielectric layers. A region surrounded by the plurality of sub conductor layers 6 and the conductor wall through conductor group 5 constitutes a vertical dielectric waveguide line b for transmitting a high-frequency signal. The dielectric waveguide line b is connected to the upper opening 1a of the upper main conductor layer 1 of the T-shaped branched dielectric waveguide line to the first and second dielectric waveguide lines a to cd. On the other hand, the laminated magic T of the present invention is configured by connecting the high-frequency signal so that the transmission direction is vertical.
[0020]
First, the horizontal first and second dielectric waveguide lines a and cd constituting the T-shaped branched dielectric waveguide line will be described. Two rows of through-hole conductor groups 3 for side walls are formed and arranged with a predetermined width Wh and a predetermined repetition interval r of less than one-half of the signal wavelength in the transmission direction of the high-frequency signal. Pseudo conductor side walls in the waveguide lines a and cd are formed. Here, the predetermined width Wh is set to λ / 2 <Wh <λ because the waveguide needs to be used in a single mode. Note that λ is the free space wavelength of the high-frequency signal in the dielectric.
[0021]
Further, the thickness Hh of the first dielectric substrate 71, that is, the distance between the upper main conductor layer 1 and the lower main conductor layer 2 needs to satisfy Hh <λ / 2. In the example shown in FIG. 1, the portions corresponding to the E and H surfaces of the dielectric waveguides a and cd are the upper main conductor layer 1 and the lower main conductor layer 2, the side wall through conductor group 3 and the sub conductor layer 4 respectively. It is formed with. Further, the side wall through conductor group 3 forms an electrical wall by setting the distance r to be less than 1/2 of the signal wavelength.
[0022]
The surface of the magnetic field is perpendicular to the side wall formed by the side wall through conductor group 3 and the sub conductor layer 4 and arranged parallel to each other. For this reason, if the gap between the through conductors of the side wall through conductor group 3 is larger than ½ of the signal wavelength, the gap acts as a slot for the electromagnetic wave, and the electromagnetic wave leaks from the gap. Even if an electromagnetic wave is fed to the line, the electromagnetic wave does not propagate along the pseudo waveguide created here. However, if the gap is ½ of the signal wavelength, preferably less than ¼ of the signal wavelength, the electromagnetic wave propagates along this pseudo waveguide with almost no leakage. The role of the sub conductor layer 4 at this time is not as important as the side wall through conductor group 3, but has an effect of bringing a more pseudo conductor wall closer to a perfect conductor wall. The propagation characteristics are improved.
[0023]
As a result, according to the configuration shown in FIG. 1, the region having a cross-sectional area of Wh × Hh surrounded by the pair of main conductor layers 1 and 2 and the two rows of side wall through conductor groups 3 and the sub conductor layer 4 The first and second dielectric waveguide lines a · cd are obtained.
[0024]
In the example shown in FIG. 1, the side wall through conductor groups 3 are formed in two rows. However, the side wall through conductor groups 3 are arranged in four rows or six rows, and the side wall through conductor groups 3 are simulated. By forming the conductor wall in a double or triple manner, leakage of electromagnetic waves from the conductor wall can be more effectively prevented.
[0025]
Next, the vertical dielectric waveguide line b will be described. According to FIG. 1, a plurality of dielectric layers having a thickness of q are laminated, and each dielectric layer has a horizontal direction (same as the cross-sectional shape of the waveguide line, specifically, the outline of the upper opening 1a). The conductor wall through conductor group 5 is formed at a predetermined interval less than one half of the signal wavelength (preferably the same as the interval r of the sidewall through conductor group 3) in the direction of the xy plane in the figure. Has been. The lower end of the conductor wall through conductor group 5 is electrically connected to the upper main conductor layer 1 of the T-shaped branched dielectric waveguide line.
[0026]
Further, between the dielectric layers of the second dielectric substrate 72, all the conductor wall through conductor groups 5 are electrically connected, and substantially the same as the upper opening 1a so as to surround the conductor wall through conductor groups 5. A plurality of sub conductor layers 6 having openings 6a having dimensions are formed in parallel to each other. Note that the formation interval of the conductor wall through conductor groups 5 and the interval q between the plurality of sub-conductor layers 6 are all less than 1/2 (preferably 1/4 or less) of the propagation signal wavelength. Is set.
[0027]
With such a configuration, in the vertical dielectric waveguide line b, a plurality of conductor wall through conductor groups 5 extending in the stacking direction of the dielectric layers of the second dielectric substrate 72 are formed in parallel to each other. A waveguide wall is formed by the lattice plane with the sub conductor layer 6. Here, of the opening dimensions of the upper opening 1a of the upper main conductor layer 1 and the opening 6a of the sub conductor layer 6, the dimension Wv in the direction orthogonal to the transmission direction of the second dielectric waveguide line cd is vertical. Since the type dielectric waveguide line b must also be used in a single mode, λ / 2 <Wv <λ (λ is a free space wavelength in the dielectric). The dimension Hv in the transmission direction of the second dielectric waveguide line cd needs to satisfy Hv <λ / 2. In the example shown in FIG. 1, the portion corresponding to the E plane of the dielectric waveguide line b is formed by the conductor wall through conductor group 5 and the sub conductor layer 6, and is parallel to the yz plane shown in FIG. 1. The portion corresponding to the H plane is a wall parallel to the zx plane formed by the conductor wall through conductor group 5 and the sub conductor layer 6.
[0028]
If the hole in the mesh-structured conductor wall formed by the conductor wall through conductor group 5 and the sub conductor layer 6 corresponding to the H plane is larger than ½ of the signal wavelength, the gap acts as a slot and electromagnetic waves leak. Therefore, even if an electromagnetic wave is fed to the dielectric waveguide line b, it does not propagate along the pseudo waveguide made here. However, if the gap is smaller than ½ of the signal wavelength (preferably ¼ of the signal wavelength), the electromagnetic wave propagates along this pseudo waveguide with almost no leakage.
[0029]
In addition, in the mesh structure formed by the conductor wall through conductor group 5 corresponding to the E plane and the sub conductor layer 6, the current due to the electromagnetic wave flows only in the y direction, so the interval q between the sub conductor layers 6 is ½ of the signal wavelength. If it is less than. The role of the conductor wall through conductor group 5 that forms the E surface here is not as important as the sub-conductor layer 6, but has the effect of bringing it closer to a perfect conductor wall, thereby improving the electromagnetic wave propagation characteristics. .
[0030]
As a result, according to the configuration shown in FIG. 1, the region having a cross-sectional area of Wv × Hv surrounded by the conductor wall through conductor group 5 and the sub-conductor layer 6 is a vertical dielectric waveguide line b. It becomes.
[0031]
Then, the T-shaped branched dielectric waveguide line and the vertical dielectric waveguide line b formed by the horizontal dielectric waveguide lines a and cd described above are formed as shown in FIG. By connecting, the structure of the laminated magic T of the present invention is completed.
[0032]
Next, FIG. 2 is a partially broken perspective view showing a schematic configuration of another example of the embodiment of the laminated magic T of the present invention. In this example, a conventional impedance matching is provided at a branch portion of the laminated magic T. A matching unit 8 made of a through conductor and a matching unit 9 made of a conductor layer are formed which function in the same manner as the metal pole and the metal plate.
[0033]
According to the laminated magic T of the present invention, the first dielectric waveguide line a, the second dielectric waveguide line cd, and the vertical dielectric waveguide line b are all dielectrics. since the transmission line according to the waveguide, 1 / √ε _r of normal rectangular waveguide when its dimensions waveguide and the dielectric constant of the first and second dielectric substrates 71 · 72 ε _r It becomes the size of. Therefore, as the first and second dielectric substrates 71 and 72 are made of a dielectric material having a large relative dielectric constant ε _r , the dimensions of each waveguide can be reduced, and wiring can be formed at a high density. A magic T having a size that can be formed in a multilayer wiring board or a package for housing semiconductor elements can be formed.
[0034]
The through conductors constituting the side wall through conductor group 3 and the conductor wall through conductor group 5 are arranged with an interval r less than half the signal wavelength λ as described above, and this interval r is good. It is desirable to set a fixed repetition interval to realize a good transmission characteristic, but it may be changed as appropriate or several values may be combined as long as the interval is less than half the signal wavelength λ. Needless to say.
[0035]
Next, a manufacturing method of the magic T using such horizontal and vertical laminated waveguides will be described with reference to an exploded perspective view shown in FIG.
[0036]
In FIG. 3, reference numeral 70 denotes a dielectric sheet to be a lowermost dielectric substrate. Other reference numerals indicate corresponding portions in FIGS. 1 and 2.
[0037]
First, a conductor pattern to be the lower main conductor layer 2 of the horizontal first and second dielectric waveguide lines is formed on the dielectric sheet 70 by printing or the like. Next, on the dielectric sheet group to be the first dielectric substrate 71, a through conductor constituting the side wall through conductor group 3 and a matching through conductor constituting the matching unit 8 composed of the through conductor are formed as necessary. To do. This is formed by forming a through hole in the dielectric sheet by NC punching, laser processing, or the like and then embedding metal ink (conductor paste) in the through hole. Thereafter, a conductor pattern to be the upper main conductor layer 1 and the sub conductor layer 4 is formed by a thick film printing method or the like.
[0038]
Further, in the plurality of dielectric sheets constituting the second dielectric substrate 72, the matching unit 9 comprising the conductor wall through conductor group 5, the sub conductor layer 6, and the conductor layer is formed in the same manner as described above. A conductive pattern is formed.
[0039]
Finally, these are laminated together, and when the dielectric sheet is resin-based, curing is performed, and when the dielectric sheet is ceramic or glass-ceramic, the laminated magic T of the present invention is manufactured.
[0040]
The dielectric material used for the first and second dielectric substrates 71 and 72 constituting such a laminated dielectric waveguide line has a characteristic that functions as a dielectric and does not hinder the transmission of high-frequency signals. The first and second dielectric substrates 71 and 72 are preferably made of ceramics from the viewpoints of accuracy in forming the transmission line and ease of manufacture, although there is no particular limitation as long as it is one. .
[0041]
As such ceramics, ceramics having various relative dielectric constants have been known so far. However, in order to transmit a high frequency signal by forming a laminated dielectric waveguide line, it is a paraelectric material. desirable. This is because ferroelectric ceramics generally have a large dielectric loss and a large transmission loss in the high frequency region. Accordingly, the relative dielectric constant ε _r of the first and second dielectric substrates 71 and 72 is suitably about 4 to 100.
[0042]
Examples of ceramics suitable for the first and second dielectric substrates 71 and 72 include alumina ceramics, glass ceramics, and aluminum nitride ceramics. These are made by adding an appropriate organic solvent / solvent to the ceramic raw material powder and mixing it into a mud, and by using a well-known doctor blade method, calendar roll method, etc. to form a sheet, a plurality of ceramics After obtaining a green sheet, each of these ceramic green sheets is appropriately punched and laminated, and for alumina ceramics 1500-1700 ° C, for glass ceramics 850-1000 ° C, aluminum nitride In the case of ceramics, it is manufactured by firing at a temperature of 1600-1900 ° C.
[0043]
The upper main conductor layer 1, the lower main conductor layer 2, the sub conductor layer 4 and the sub conductor layer 6 are made of tungsten or the like if the first and second dielectric substrates 71 and 72 are made of alumina ceramics, for example. On the ceramic green sheet so that at least the transmission line is completely covered by thick film printing method by adding a suitable oxide, organic solvent, solvent, etc. such as alumina, silica, magnesia, etc. to the metal powder and pasting it into a paste. After that, it is fired at a high temperature of about 1600 ° C. to form a thickness of 10 to 15 μm or more.
[0044]
The metal powder forming each conductor layer and each through conductor includes copper, gold, silver, etc. when the dielectric substrate is made of glass ceramics, and tungsten, molybdenum, manganese when the dielectric substrate is made of alumina ceramics or aluminum nitride ceramics. Etc. are suitable. Moreover, what is necessary is just to let the thickness of each conductor layer 1,2,4,6 be about 5-50 micrometers.
[0045]
The through conductors constituting the through conductor groups 3 and 5 may be formed of, for example, via conductors or through-hole conductors, and the cross-sectional shape thereof is not limited to a circle that is easy to manufacture, but also a rectangle, rhombus, hexagon, and octagon. It may be a polygon such as. These through conductors are embedded in a through hole formed by punching a ceramic green sheet as a dielectric sheet, for example, and the same conductive paste as that of each of the conductor layers 1, 2, 4 and 6 is embedded, and then the dielectric sheet. At the same time, it is formed by firing. These penetrating conductors have a diameter of 50 to 300 μm.
[0046]
In addition, this invention is not limited to the example of the above embodiment, A various change and improvement can be performed in the range which does not deviate from the summary of this invention. For example, in the example of the above embodiment, each main conductor layer of the horizontal dielectric waveguide line is formed to be an H plane, but this is changed by changing the cross-sectional dimension of each dielectric waveguide line. You may form so that it may become an E surface.
[0047]
【The invention's effect】
According to the laminated magic T of the present invention, since each waveguide is constituted by a laminated dielectric waveguide line, it can be easily manufactured with sufficient accuracy using a green sheet lamination technique. . Further, since this manufacturing process is the same as the conventional green sheet lamination technique, it can be easily incorporated into a multilayer wiring board, a semiconductor element housing package, or the like.
[0048]
Furthermore, by appropriately selecting the relative permittivity of the dielectric material constituting the dielectric substrate and the dielectric layer, even when the frequency is low, it is much smaller than the magic T using the conventional rectangular waveguide. Can be
[0049]
A portion corresponding to a metal pole or a metal plate as an impedance matching device provided in the branch portion can be easily produced by forming a similar through hole and printing a conductor paste.
[0050]
As described above, according to the present invention, the magic T having good transmission / branching characteristics can be obtained accurately and stably, and the magic T having high productivity can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of an example of an embodiment of a laminated magic T of the present invention.
FIG. 2 is a perspective view showing a schematic configuration of another example of the embodiment of the laminated magic T of the present invention.
FIG. 3 is an exploded perspective view for explaining a method of manufacturing the laminated magic T of the present invention.
FIG. 4 is a perspective view showing an example of a conventional magic T. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Upper main conductor layer 1a ... Upper opening 2 ... Lower main conductor layer 3 ... Side wall through conductor group 5 ... Conductor wall through conductor group 6... Sub-conductor layer 6 a... Opening 8... Matching device made of through conductor 9... Matching device made of conductor layer
71 ・ ・ ・ ・ ・ First dielectric substrate
72 ... second dielectric substrate a ... first dielectric waveguide line b ... vertical dielectric waveguide line cd ... second Dielectric waveguide line

Claims (2)

An upper main conductor layer and a lower main conductor layer sandwiching the first dielectric substrate, a repetition interval less than a half of a signal wavelength in the high-frequency signal transmission direction between the upper main conductor layer and the lower main conductor layer, and a predetermined interval 1 and 2 which transmit the said high frequency signal by the area | region enclosed by the said each main conductor layer and the said through-conductor group for side walls. Transmission of a high frequency signal to a side opening provided at one end of the second dielectric waveguide line, the tip of the first dielectric waveguide line. In a T-shaped branch dielectric waveguide line, which is connected so that the direction is vertical, and a predetermined upper opening is provided in the upper main conductor layer of the second dielectric waveguide line of the branch portion In contrast, a second dielectric substrate formed by laminating a plurality of dielectric layers, and the upper opening. A conductor wall through conductor group formed in the surrounding direction in the second dielectric substrate in the stacking direction and electrically connected to the upper main conductor layer at a predetermined interval; and the signal of the high-frequency signal between the dielectric layers A plurality of sub-conductor layers formed at intervals less than one half of the wavelength and electrically connecting the conductor wall through conductor groups between the dielectric layers, each having an opening having substantially the same size as the upper opening; A vertical dielectric waveguide line that transmits the high-frequency signal by a region surrounded by the plurality of sub conductor layers and the conductor wall through conductor group, and the first opening and the first dielectric waveguide line in the upper opening. A laminated magic T characterized in that it is connected to the two dielectric waveguide lines so that the transmission direction of the high-frequency signal is vertical. 2. The laminated magic T according to claim 1, wherein a matching unit comprising a through conductor and / or a conductor layer is provided at the branch portion of the T-shaped branch dielectric waveguide line.

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