JPH08181502A - Corner circuit for nrd guide - Google Patents

Abstract

PURPOSE: To send a signal sent in a specific direction by an NRD guide of a specific layer to one direction or over different from the specific direction through an NRD guide of other layers. CONSTITUTION: A hole is made to conductor plates 1, 1', 1" used with adjacent guides in common at a crossing where plural NRD guides are stereoscopically crossed over plural layers, NRD guide dielectric lines 2, 2' are broken and open at a position facing the hole, radio wave reflectors 3, 3' are arranged opposite to the open end to form a free space in continuity with each guide longitudinally through the holes surrounded by the guide line open ends 6, 6' in crossing and the reflectors. A signal propagated as a wave with a short wavelength in the dielectric lines 2, 2' is converted in a spatial radiation wave whose wavelength is long in the space and reaches the dielectric line open ends 6, 6' of the NRD guide of other layers, the signal is sent in an optional direction in the dielectric line of the other layer guide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal transmitted in a specific direction by an NRD guide formed in a specific layer, and one or more signals which are generally different from the direction of another layer. And a corner circuit of the NRD guide for transmitting the signal through the NRD guide in the direction.

[0002]

2. Description of the Related Art FIG. 4 is a diagram for explaining the concept of a general NRD guide. A line 2 made of a dielectric material having a height a and a width b is used as a signal transmission line, and the dielectric line 2 is sandwiched between conductor plates 1 arranged vertically. In addition, in this figure and all figures other than FIG. 1, the illustration of the upper and lower conductor plates 1 is omitted for the sake of simplicity and easy understanding. When the NRD guide is used for transmission of microwaves, millimeter waves, or other high-frequency signals, the loss is smaller than that of a rectangular waveguide whose outside is surrounded by a conductor plate. The upper and lower conductor plates 1 serve to suppress the loss, and the distance a is set to be half the free space wavelength of the signal frequency or less. Because of such an interval, radio wave propagation is not possible in an intermediate free space sandwiched between the upper and lower conductor plates 1, and there is no lateral loss from the dielectric line of the NRD guide.

In order to change the signal transmission direction of the NRD guide, Japanese Patent Application No. 6-158520 has already proposed a corner circuit having a planar shape as shown in FIG. This is the center of bending with one side of the end cross section of the dielectric lines 2 and 2'of the two NRD guides connected to the corner circuit and arranged in mutually different directions orthogonal to each other in the signal transmission direction. On the plane connecting the other sides of the end cross section or parallel to this plane, and 2
Expect the two dielectric lines to be substantially symmetrical, and arrange the conductive blocks 8 so as to surround the vicinity of the center of the bending from the outside,
A dielectric block 7 having a relative permittivity that is the same as or higher than the line material of the NRD guide, in a portion surrounded by the cross-sections of the two dielectric lines perpendicular to the signal transmission direction and the conductive block. Is buried.

[0004]

However, the above technique is only capable of bending the transmission direction on the same plane (or in the layer in which the NRD guide is formed).
A means for transmitting a signal by bending a transmission line from one plane (or in a layer) to another plane (or in a layer) above and below is N
It did not exist in the circuit based on the RD guide.

According to the present invention, the upper and lower parts sandwiching one dielectric line are
The signal transmitted through the NRD guide of the specific layer having the structure of one conductor plate is parallel to the specific layer and has the same structure as described above, and the dielectric line for signal transmission is laid in any different direction. It is an object of the present invention to provide a corner circuit of an NRD guide in which the signal transmission direction is arbitrarily changed by guiding it to another layer's NRD guide.

[0006]

In order to solve the above-mentioned problems, the present invention comprises a signal transmission dielectric line and upper and lower conductor plates sandwiching the same at intervals of half the free space wavelength of the signal frequency or less. In an NRD guide corner circuit that arbitrarily changes the signal transmission direction of the NRD guide, one NRD
Adjacent to the guide by sharing at least one of the conductor plates, a plurality of layers of NRD guides each having a similar structure and an arbitrary transmission direction are arranged, and are commonly used by the NRD guides having the multilayer structure. Through holes are provided in the conductor plate where the NRD guides intersect, and the dielectric lines of the NRD guides of the respective layers are cut and opened at the positions facing the through holes, and the end faces of the dielectric line of the NRD guides of the respective layers are cut. The radio wave reflectors are installed in the respective portions facing each other through the through holes, and the NRD guides are surrounded by the cut end faces of the dielectric lines of the respective guides and the radio wave reflectors and through the through holes of the conductor plates between the respective layers. A signal transmitted through one NRD guide is radiated from the cut end face of the dielectric line and once becomes a radio wave and propagates in the free space. Te reaches the dielectric waveguide cut end face of another NRD guide, and to be transmitted to the NRD guide dielectric waveguide in the desired direction again.

[0007]

The NRs are surrounded by the cut end faces of the dielectric lines of the respective NRD guides and the radio wave reflector, and the NRs are provided through the through holes.
The height of the free space connecting the D guides (in the direction orthogonal to the conductor plate), that is, the sum of the heights a of the dielectric lines of each NRD guide becomes longer than half the free space wavelength of the transmission signal (NRD guide). The height a of the dielectric line of
The signal transmitted through the dielectric line of one NRD guide is released as a normal space radio wave from the cut end face of the dielectric line. The radiation is radiated and propagates in the direction orthogonal to the direction of the dielectric line in the free space to reach the cut end face of the dielectric line of another NRD guide that intersects forming a multilayer structure, Is transmitted in the desired direction.

[0008]

FIG. 1 is a sectional view of the yz plane (see FIG. 4) of the first embodiment of the present invention. In the figure, the signal wave input from A is
On the basis of the above-mentioned NRD guide principle, only the first dielectric line 2 sandwiched between the conductor plates 1 and 1 ′ propagates as NRD guide mode radio waves and reaches the first open end 6. Since the free space 4 exists here, the signal radio wave is radiated only to this free space 4 which does not satisfy the above-mentioned cutoff condition. That is, in the area C described in the lower part of the figure, each propagates only in the guide line 2 due to the above-mentioned cutoff condition, and in the area D, propagates in the space 4. This signal wave is reflected by the reflector 3
And the cutoff condition of the space 9 sandwiched by the outer conductor plate at the intersection position (the distance a between the conductor plates 1 and 1 ′ and the distance a between the conductor plates 1 ′ and 1 ″ are the signal wavelength in the free space, respectively). 1/2 of
Because of the following), the space 4 is not emitted to any place other than the free space 4, so that the space 4 is used as a spatially radiated wave 5 at the open end 6 ′ of the second dielectric waveguide 2 ′ sandwiched between the conductor plates 1 ′ and 1 ″. Upon arrival, the signal is transmitted into the second dielectric line 2 ', becomes an NRD guide mode radio wave, and is transmitted therein. As a result, the signal input from A is transmitted to B.

FIG. 2 is a perspective view showing the arrangement of the dielectric lines 2 and 2'of the NRD guide of the second embodiment of the present invention. In this figure, for simplification of illustration, illustration of a conductor plate and a reflector is omitted. In this embodiment, the dielectric line 2 and the dielectric line 2'are different in signal transmission direction by an angle θ. Further, as shown in FIG. 1, each layer is formed in a multi-layer structure (a layer refers to an NRD guide in which a dielectric line is sandwiched between two conductor plates) and is present in different adjacent layers intersecting each other. ing. It goes without saying that holes are made to penetrate at the intersecting positions of the upper and lower NRD guides of the common conductor plate (not shown) interposed between the dielectric lines 2 and 2 '. Further, in this case, it is needless to say that when the reflectors at the cut ends of the dielectric line of each NRD guide, which are not shown, are installed, they must be designed so as to meet the crossing angle θ. In this way, the signal input from A is transmitted to B.

FIG. 3 is a perspective view showing the arrangement of the dielectric lines 2, 2 ₁ , 2 ₂ , 2 ₃ of the NRD guide of the third embodiment of the present invention. Also in this figure, for simplification of illustration, the illustration of the conductor plate and the reflector is omitted. In this embodiment, the signal input to the lower input port (line) A is three-dimensionally branched and output to the upper output ports (line) B, C, and D. Of course, according to the above concept, it is possible to realize a three-dimensional branch of n inputs and m outputs for natural numbers n and m where n ≧ 1 and m ≧ 1.

[0011]

As described above, according to the present invention, a through hole is provided in a conductor plate shared by adjacent NRD guides at a position where a plurality of NRD guides form a multi-layer structure and intersects each NRD guide. Form a free space that connects the NRD guides in a direction orthogonal to the plane in which the guides are deployed,
Since the signal can be propagated as a normal space radiated radio wave only in this free space, the effect that the transmitted signal can be branched in an arbitrary direction by intersecting the NRD guide circuit in three dimensions was gotten.

[Brief description of drawings]

FIG. 1 shows two sets of NRs that are adjacent to each other and overlap each other for generally explaining the principle of the invention with respect to the first embodiment of the present invention.
It is sectional drawing of the intersection of D guide.

FIG. 2 is a diagram in which two pairs of adjacent NRD guides are three-dimensionally crossed, and at the intersection, a signal transmitted in the dielectric line of one NRD guide is passed by the other NRD guide at an arbitrary angle θ. The second that is adapted to transmit in different directions
It is a perspective view showing arrangement of a dielectric track of an example.

FIG. 3 is a perspective view showing a dielectric line layout of a third embodiment in which one input signal is three-dimensionally branched and output in arbitrary three directions.

FIG. 4 is a diagram for explaining the concept of a general NRD guide.

FIG. 5 is a diagram for explaining a method of bending the signal transmission direction of the NRD guide according to the technique described in Japanese Patent Application No. 6-158520.

[Explanation of symbols]

1, 1 ', 1 "... Conductor plates 2, 2',
2 ₁ , 2 ₂ , 2 ₃ ... Dielectric line 3, 3 '... Radio wave reflector 4 ... Free space formed at NRD guide intersecting position 5 ... Space radiated wave 6, 6' ... Dielectric line open end 7 ... Dielectric block 8 ... Conductive block 9 ... Space sandwiched by the outer conductor plate at the intersection position

Claims (3)

[Claims] 1. An NR for arbitrarily changing the signal transmission direction of an NRD guide comprising a dielectric line for signal transmission and upper and lower conductor plates sandwiching the dielectric line at intervals less than half of the free space wavelength of the signal frequency.
In the corner circuit of the D guide, a plurality of layers of NRD guides having a similar structure and an arbitrary transmission direction, which share at least one of the conductor plates and are adjacent to each other, are arranged for one NRD guide. A through hole is provided at a position where the NRD guide intersects in the conductor plate that is also used as the NRD guide having the multilayer structure.
The dielectric lines of the NRD guides are cut and opened at the positions facing the through holes, and the radio wave reflectors are installed on the cut end faces of the dielectric line of the NRD guides at the positions facing each other across the through holes. , A free space for connecting the guides of a plurality of layers is formed through the through-holes at the intersecting positions, which are surrounded by the cut end faces of the dielectric lines of the respective guides and the radio wave reflector, and the inside of the dielectric line of one NRD guide is formed. The electric wave of the transmitted signal is radiated from the cut end surface of the dielectric line, once becomes a radio wave in free space, propagates in this free space, and reaches the cut end surface of the dielectric line of another NRD guide. The corner circuit of the NRD guide is characterized in that the signal wave is transmitted again in the desired direction in the dielectric line of the NRD guide. 2. A NRD guide is superposed on a plurality of layers of two or more layers, and a free space for connecting the NRD guides of the respective layers is formed at a position where the NRD guides of the plurality of layers intersect, thereby forming one N.
The corner circuit of the NRD guide according to claim 1, wherein a signal transmitted through the RD guide is three-dimensionally branched into NRD guides of two or more layers. 3. When a plurality of layers of NRD guides are made to intersect with each other by forming a multi-layer structure, a plurality of NRD guides having different transmission directions are provided in through holes of a common conductor plate in at least a specific layer. The corner circuit of the NRD guide according to claim 1, wherein the corner circuit is arranged so as to face.