CN105977593B - Input/output structure of dielectric waveguide and mounting structure of dielectric waveguide - Google Patents
Input/output structure of dielectric waveguide and mounting structure of dielectric waveguide Download PDFInfo
- Publication number
- CN105977593B CN105977593B CN201610139910.7A CN201610139910A CN105977593B CN 105977593 B CN105977593 B CN 105977593B CN 201610139910 A CN201610139910 A CN 201610139910A CN 105977593 B CN105977593 B CN 105977593B
- Authority
- CN
- China
- Prior art keywords
- dielectric waveguide
- input
- dielectric
- output
- output electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/16—Dielectric waveguides, i.e. without a longitudinal conductor
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention provides an input/output structure of a dielectric waveguide, a mounting structure of a dielectric waveguide, a dielectric waveguide filter, and a large-scale multiple-input multiple-output system. The dielectric waveguide includes a rectangular parallelepiped dielectric, and input/output electrodes and a conductor film formed on an outer surface of the dielectric. The input/output electrode is projected from a first end of the dielectric body, which is a vertex or a vicinity of the vertex, into a surface of the bottom surface on a first surface (bottom surface) of the dielectric body, and conductor non-forming portions where no conductor film is present are provided on both sides of the input/output electrode and along the periphery of the first end.
Description
Technical Field
The present invention relates to a dielectric waveguide, and more particularly, to a structure of a signal input/output unit of a dielectric waveguide, a mounting structure of a dielectric waveguide to a substrate, a dielectric waveguide filter, and a Massive multiple input multiple output (Massive MIMO) system.
Background
As an input/output structure for directly mounting a dielectric waveguide filter or the like, which is formed by coupling a plurality of dielectric waveguide resonators, on a printed circuit board, for example, as disclosed in japanese patent laid-open nos. 2002-135003 and 2003-110307, an input/output structure using a dielectric waveguide in which input/output electrodes are formed on the bottom surface and the side walls of a dielectric waveguide resonator that performs input/output is used.
Fig. 17 is a bottom perspective view showing an example of a dielectric waveguide filter using the dielectric waveguide input/output structure described in japanese patent application laid-open nos. 2002-135003 and 2003-110307.
The dielectric waveguide filter 100 is constituted by a dielectric waveguide resonator 102 whose resonance mode is a TE mode. The dielectric waveguide resonators 102 are connected via a slot 103. On the bottom surface 102b of each dielectric waveguide resonator 102, a strip-shaped input/output electrode 105 is provided which extends from the center of 2 sides facing each other in the direction of the facing side. Conductor non-forming portions 106 and 107 are provided on both side portions and along the periphery of the end portion of the input/output electrode 105. The other region is covered with a conductor film.
Disclosure of Invention
The input/output structure of a dielectric waveguide according to the present invention is an input/output structure of a dielectric waveguide including: a dielectric in the shape of a rectangular parallelepiped; an input/output electrode formed on the first surface of the dielectric; and a conductor film formed on an outer surface of the dielectric, wherein the input/output structure of the dielectric waveguide is characterized in that:
the input/output electrode extends from a first end of the first surface of the dielectric member, which is at or near the apex, into the surface of the first surface, and conductor non-forming portions, in which the conductor film is not present, are provided on both sides of the input/output electrode and around the first end.
Drawings
Fig. 1A is a bottom perspective view of a dielectric waveguide filter 10 according to a first embodiment including an input/output structure of a dielectric waveguide according to the present invention. Fig. 1B is an exploded perspective view showing a mounting structure of the dielectric waveguide filter 10 to a printed board.
Fig. 2 is a diagram showing a simulation result of a magnetic field intensity distribution of a dielectric waveguide filter having an input/output structure of a dielectric waveguide according to the first embodiment.
Fig. 3 is a diagram showing a relationship between the external Q and the protrusion length L1 of the input/output electrode of the dielectric waveguide in the dielectric waveguide filter 10 according to the first embodiment.
Fig. 4A is a bottom perspective view of a dielectric waveguide filter 11 according to a second embodiment having an input/output structure of a dielectric waveguide according to the present invention. Fig. 4B is an exploded perspective view showing a mounting structure of the dielectric waveguide filter 11 to a printed board.
Fig. 5 is a diagram showing the relationship between the external Q and the length L2 of the conductor non-formation portions 61a and 61b along the edges RLa and RLb in the input/output structure of the dielectric waveguide in the dielectric waveguide filter 11 according to the second embodiment.
Fig. 6A is a perspective view showing a dielectric waveguide filter 12 and a mounting structure thereof according to a third embodiment. Fig. 6B is a perspective view showing another dielectric waveguide filter 13 and its mounting structure according to the third embodiment.
Fig. 7A is a bottom perspective view of the dielectric waveguide filter 14 of the fourth embodiment. Fig. 7B is a bottom view thereof.
Fig. 8 is a partially enlarged bottom view showing a detailed structure of a portion where the input/output electrode 54 is formed.
Fig. 9 is a plan view showing a connection structure between the printed circuit board and the dielectric waveguide filter 14.
Fig. 10 is a diagram showing frequency characteristics of insertion loss and reflection loss of the dielectric waveguide filter 14 according to the fourth embodiment.
Fig. 11 is a perspective view showing dielectric waveguide filters 15a and 15b and a mounting structure thereof according to a fifth embodiment.
Fig. 12 is a bottom perspective view of the dielectric waveguide filters 15a and 15b and a perspective view of the printed circuit board.
Fig. 13 is a perspective view showing dielectric waveguide filters 16a and 16b and a mounting structure thereof according to a sixth embodiment.
Fig. 14 is a bottom perspective view of the dielectric waveguide filters 16a and 16b and a perspective view of the printed circuit board.
Fig. 15 is a plan view of the antenna device 1 used in the large-scale mimo system.
Fig. 16 is a diagram showing the structure of the antenna device 1 and the structure of the front end circuit (front end circuit) connected thereto.
Fig. 17 is a bottom perspective view showing an example of a dielectric waveguide filter using the dielectric waveguide input/output structure described in japanese patent application laid-open nos. 2002-135003 and 2003-110307.
Fig. 18 is a diagram showing a simulation result of a magnetic field intensity distribution of a dielectric waveguide filter having the input/output structure of the conventional dielectric waveguide shown in fig. 17.
Detailed Description
Several specific examples are described below with reference to the drawings, and a plurality of embodiments for carrying out the present invention are described below. The same reference numerals are attached to the same parts in the drawings. In view of ease of explanation or understanding of the points, the embodiments are shown for convenience, but partial replacement or combination of the structures shown in different embodiments may be performed. Descriptions of the contents common to the first embodiment will be omitted from the second embodiment, and only different points will be described. In particular, the same operational effects achieved by the same configurations are not mentioned in each embodiment.
First embodiment
Fig. 1A is a bottom perspective view of a dielectric waveguide filter 10 according to a first embodiment having an input/output structure of a dielectric waveguide according to the present invention. Fig. 1B is an exploded perspective view showing a mounting structure of the dielectric waveguide filter 10 to a printed board.
As shown in fig. 1A, the dielectric waveguide filter 10 has 2 dielectric waveguide resonators 20.
The dielectric waveguide resonator 20 includes: a dielectric body in a rectangular parallelepiped shape having 2 regions formed by providing a pair of slits 30; and a pair of input/output electrodes 50 and a conductive film 20a formed on the outer surface of the dielectric. The slit 30 is an example of the "narrowing" of the present invention. It can also be said that 2 dielectric waveguide resonators 20 are connected via the formation portion of the slot 30.
Each dielectric waveguide resonator 20 resonates in the TE mode. When the resonance mode is expressed by TExyz, each dielectric waveguide resonator 20 is a dielectric resonator of the TE110 mode.
A first surface (hereinafter referred to as "bottom surface") of the dielectric waveguide filter 10 is an H-plane of the waveguide, and the dielectric waveguide resonator 20 is electromagnetically coupled through a window (iris) (inductance window) formed by the slot 30.
The input/output electrode 50 extends in a strip shape from a first end of a rectangular parallelepiped shape as a vertex P toward the center of the bottom surface of the dielectric waveguide resonator on the bottom surface 40c of the dielectric. The dimension L1 in fig. 1A is the protruding length of the input-output electrode 50. Further, conductor non-forming portions 60, 70a, and 70b having no conductor film are provided on both sides of the input/output electrode 50 and around the first end.
Here, "both sides of the input-output electrode 50" refer to the left and right sides when viewing the extending direction of the input-output electrode 50. The fact that the periphery of the input/output electrode 50 along the first end is a conductor non-formation portion means that the starting point of the input/output electrode 50 in the extending direction is separated from the conductor film.
The input/output electrode 50 is not limited to protruding from the apex of the bottom surface of the dielectric body into the plane. The vicinity of the apex may be referred to as the "first end" of the present invention, and the input/output electrode 50 may protrude therefrom into the plane of the bottom surface. Here, the "vicinity of the apex" means a distance range of less than 1/4 of the extension length of the input/output electrode 50, for example.
As shown in fig. 1B, the dielectric waveguide filter 10 is mounted on a printed board 80. The printed board 80 includes lines 90a and 90b having distal end portions formed in substantially the same shape as the input/output electrodes 50, and a ground pattern 90 c. In the mounted state of the dielectric waveguide filter 10, the input/ output electrodes 50, 50 of the dielectric waveguide filter 10 are connected to the tips of the lines 90a, 90b on the printed circuit board 80, respectively, and the conductive film 20a of the dielectric waveguide filter 10 is connected to the ground pattern 90c on the printed circuit board 80.
The lines 90a and 90b and the ground pattern 90c form a coplanar line. When a ground pattern spreading in a planar shape is formed on the lower surface of the printed board 80, a ground coplanar line is formed. Further, if a ground pattern spreading in a planar shape is formed on the lower surface of the printed board 80 and the width of the electrode non-formation region on both sides of the lines 90a and 90b is increased, the lines 90a and 90b and the ground pattern on the lower surface form a microstrip line.
In general, in a TE mode waveguide resonator, when the resonator is cylindrical, an electric field is strongest at the center of the resonator and weakest at the outer periphery, and a magnetic field is uniformly distributed around the center of the resonator. When the dielectric waveguide resonator is in a rectangular parallelepiped shape, the magnetic field is not uniformly distributed, but is strongest at the side near the center of the resonator and weakest at the center and corners of the resonator. That is, in the case where the dielectric waveguide resonator is rectangular parallelepiped, since the electric field and the magnetic field are weakest at the corners, the leakage of the electromagnetic field is small even if the input/output electrodes are provided at the corners of the bottom surface of the dielectric.
In order to cause the input/output electrodes provided at the corners of the bottom surface of the dielectric to function, it is necessary to provide conductor non-forming portions on both sides of the input/output electrodes and around the first ends, in which no conductor film is present. This is because, when the conductor films are present on both sides of the input-output electrode 50 and along the periphery of the first end, the mismatch of the electromagnetic field becomes large.
That is, by providing the input/output electrodes at the corners of the bottom surface of the dielectric and providing the conductor non-forming portions on both sides of the input/output electrodes and along the periphery of the first end, it is possible to reduce the mismatch of the electromagnetic field caused by the discontinuity between the line provided on the printed substrate and the input/output electrodes of the dielectric waveguide. Therefore, the loss due to reflection and radiation of the electromagnetic field at the input/output portion of the dielectric waveguide can be reduced.
However, when the sizes of the input/output electrodes and the ends of the lines on the printed circuit board are equal, the shapes of the input/output electrodes substantially change due to variations in mounting, and the widths of the ends of the lines 90a and 90b formed on the printed circuit board may be smaller than the line width of the input/output electrodes 50 of the dielectric waveguide filter 10 in consideration of variations. This can suppress the characteristic change due to the variation.
Fig. 2 is a diagram showing a simulation result of a magnetic field intensity distribution of a dielectric waveguide filter having an input/output structure of a dielectric waveguide according to the first embodiment. Fig. 18 is a diagram showing a simulation result of a magnetic field intensity distribution of a dielectric waveguide filter having the input/output structure of the conventional dielectric waveguide shown in fig. 17. The lighter the concentration of both is, the higher the magnetic field strength is.
As is clear from the simulation results of fig. 2 and 18, the input/output structure of the dielectric waveguide according to the first embodiment has less leakage of the magnetic field to the outside than the conventional input/output structure of the dielectric waveguide.
Fig. 3 is a diagram showing a relationship between the external Q and the protrusion length L1 of the input/output electrode of the dielectric waveguide in the dielectric waveguide filter 10 according to the first embodiment. Here, the diagonal dimension of the bottom surface of the dielectric waveguide resonator 20 is about 4.2 mm. As is clear from fig. 3, the value of the external Q decreases as the protrusion length L1 of the input/output electrode increases. That is, the coupling coefficient between the input/output electrode and the dielectric waveguide resonator becomes high. However, even if the protrusion length is further increased from the center of the bottom surface of the dielectric waveguide resonator, there is almost no effect of improving the coupling coefficient.
Second embodiment
In the second embodiment, a dielectric waveguide filter in which the shapes of the input/output electrodes and the conductor non-formation portions are different from those of the example shown in the first embodiment is shown.
Fig. 4A is a bottom perspective view of a dielectric waveguide filter 11 according to a second embodiment having an input/output structure of a dielectric waveguide according to the present invention. Fig. 4B is an exploded perspective view showing a mounting structure of the dielectric waveguide filter 11 to a printed board.
As shown in fig. 4A, the dielectric waveguide filter 11 has 2 dielectric waveguide resonators 21. Each dielectric waveguide resonator 21 is a dielectric resonator of TE110 mode similar to the dielectric waveguide resonator 20 shown in the first embodiment.
The dielectric waveguide resonator 21 includes: a dielectric body in a rectangular parallelepiped shape having 2 regions formed by providing a pair of slits 31; and input/ output electrodes 51b and 51c and a conductive film 21a formed on the outer surface of the dielectric. The slit 31 is an example of the "narrowing portion" of the present invention. It can also be said that 2 dielectric waveguide resonators 21 are connected via the formation portion of the slot 31.
The bottom surface of the dielectric of dielectric waveguide filter 11 is the H-surface of the waveguide, and dielectric waveguide resonator 21 is electromagnetically coupled through a window (inductance window) formed by slot 31.
The input/output electrode 51b is a strip-like portion extending toward the center of the bottom surface of the dielectric waveguide resonator. The input/output electrode 51c is a triangular portion formed on the bottom surface of the dielectric waveguide resonator. The input/output electrode 51c has two sides along two edges RLa and RLb formed by the bottom surface 41c of three surfaces (the bottom surface 41c and the side surfaces 41a and 41b) intersecting at the vertex P and the remaining two surfaces (the side surfaces 41a and 41 b).
In the present embodiment, the input/output electrode 51b extends from the bottom surface 41c of the dielectric waveguide resonator 21 to the side surfaces 41a and 41 b.
As shown in fig. 4B, the dielectric waveguide filter 11 is mounted on a printed board 81. The printing substrate 81 includes: lines 91a and 91b having distal end portions formed in substantially the same shapes as the input/ output electrodes 51b and 51c, respectively; and a ground pattern 91 c. In the mounted state of the dielectric waveguide filter 11, the input/output electrodes (51b, 51c), (51b, 51c) of the dielectric waveguide filter 11 are connected to the tips of the lines 91a, 91b on the printed circuit board 81, respectively, and the conductive film 21a of the dielectric waveguide filter 11 is connected to the ground pattern 91c on the printed circuit board 81.
The lines 91a and 91b and the ground pattern 91c form a coplanar line. When a ground pattern spreading in a planar shape is formed on the lower surface of the printed circuit board 81, a ground coplanar line is formed. Further, if a ground pattern spreading in a planar shape is formed on the lower surface of the printed circuit board 81 and the width of the electrode non-formation region on both sides of the lines 91a and 91b is increased, the microstrip line is formed by the lines 91a and 91b and the ground pattern on the lower surface.
As described above, in the TE mode waveguide resonator, in the case where the resonator is cylindrical in shape, the electric field is strongest at the center of the resonator and weakest at the outer periphery, and the magnetic field is uniformly distributed around the center of the resonator. Therefore, the current flowing through the conductive film of the dielectric waveguide resonator has a high current density at the center of each of the 4 sides of the bottom surface. Therefore, the longer the dimension L2 of the conductor non-formation portions 61a and 61b along the edges RLa and RLb, the more current is shielded in the portion having the higher current density. As a result, when L2 is about 1/2 of the resonator length, the coupling coefficient between the input/output electrodes (51b, 51c) and the dielectric waveguide resonator is strongest.
Fig. 5 is a diagram showing the relationship between the external Q and the length L2 of the conductor non-formation portions 61a and 61b along the edges RLa and RLb in the input/output structure of the dielectric waveguide in the dielectric waveguide filter 11 according to the second embodiment. Here, the size of the shortest side among 4 sides of the bottom surface of the dielectric waveguide resonator 21 is about 2.5 mm. As is clear from fig. 5, the value of the outer portion Q is made smaller as the length dimension L2 of the conductor non-formation portions 61a, 61b along the edges RLa, RLb is larger. That is, the higher the coupling coefficient between the input/output electrode and the dielectric waveguide resonator. The dielectric waveguide resonator according to the present embodiment can obtain a lower external Q than the external Q value in the dielectric waveguide filter according to the first embodiment.
Thus, by lowering the external Q of the dielectric waveguide resonator, a frequency characteristic having a wider bandwidth can be obtained.
In the dielectric waveguide resonator 21 shown in fig. 4A, the length of the portion along the edge RLb in the conductor non-formation portion 61b may be longer than the length of the portion along the edge RLa in the conductor non-formation portion 61a, and the conductor non-formation portions 61a and 61b may be asymmetric. In addition, the conductor non-formation portion 61b may be further extended along the edge RLc. This can further reduce the value of the external Q.
Third embodiment
In the third embodiment, an example of 2 dielectric waveguide filters having 3 or more dielectric waveguide resonators is shown.
Fig. 6A is a perspective view showing a dielectric waveguide filter 12 and a mounting structure thereof according to a third embodiment. Fig. 6B is a perspective view showing another dielectric waveguide filter 13 and its mounting structure according to the third embodiment.
The dielectric waveguide filter 12 shown in fig. 6A includes 8 dielectric waveguide resonators 22a, 22b, 22c, 22d, 22e, 22f, 22g, 22 h. These dielectric waveguide resonators 22a to 22h are arranged in a straight line. On the bottom surfaces of the dielectric waveguide resonators 22a and 22h, input/output electrodes similar to those shown in fig. 1A or 4A are formed.
The printed substrate 82 includes: lines 92a and 92b having distal end portions formed in substantially the same shape as the input/output electrodes of the dielectric waveguide filter 12; and a ground pattern 92 c. In the mounted state of the dielectric waveguide filter 12, the input/output electrodes of the dielectric waveguide filter 12 are connected to the ends of the lines 92a and 92b on the printed substrate 82, respectively, and the conductive film of the dielectric waveguide filter 12 is connected to the ground pattern 92c on the printed substrate 82.
The dielectric waveguide resonators 22a to 22h are electromagnetically coupled between the adjacent resonators, respectively. Therefore, the dielectric waveguide filter 12 functions as a bandpass filter including 8-stage connected resonators.
The dielectric waveguide filter 13 shown in fig. 6B includes 6 dielectric waveguide resonators 23a, 23B, 23c, 23d, 23e, 23 f. These dielectric waveguide resonators 23a to 23f are electromagnetically coupled in a U shape. Input/output electrodes similar to those shown in fig. 1A or 4A are formed on the bottom surfaces of the dielectric waveguide resonators 23a and 23 f.
The printed substrate 83 includes: lines 93a and 93b having distal end portions formed in substantially the same shape as the input/output electrodes of the dielectric waveguide filter 13; and a ground pattern 93 c. In the mounted state of the dielectric waveguide filter 13, the input/output electrodes of the dielectric waveguide filter 13 are connected to the tips of the lines 93a and 93b on the printed substrate 83, respectively, and the conductive film of the dielectric waveguide filter 13 is connected to the ground pattern 93c on the printed substrate 83.
The dielectric waveguide resonators 23a to 23f are coupled in the order of dielectric waveguide resonator 23a → 23b → 23c → 23d → 23e → 23 f. The coupling from the dielectric waveguide resonator 23a to the dielectric waveguide resonator 23c is performed through a window formed by a slot, as in the dielectric waveguide filter 12 shown in fig. 6A. The same applies to the coupling from the dielectric waveguide resonator 23d to the dielectric waveguide resonator 23 f.
The dielectric waveguide resonator 23c and the dielectric waveguide resonator 23d are coupled in a structure other than the above-described window. For example, the coupling is performed by a conductor pattern non-formation portion for coupling between resonators formed on the printed substrate 83. Alternatively, conductor non-formation portions are provided on the surfaces of the dielectric waveguide resonators 23c and 23d facing each other, and the conductor non-formation portions are coupled to each other.
In this way, the drawing directions of the 2 input/output electrodes may be substantially parallel as shown in fig. 6A, or may be intersecting as shown in fig. 6B.
Fourth embodiment
In the fourth embodiment, an example of a dielectric waveguide filter used as a band pass filter including a notch filter is shown.
Fig. 7A is a bottom perspective view of the dielectric waveguide filter 14 of the fourth embodiment. Fig. 7B is a bottom view thereof.
As shown in fig. 7A, the dielectric waveguide filter 14 includes 9 dielectric waveguide resonators 24a to 24 i. The dielectric waveguide resonators 24a to 24i are dielectric resonators of TE110 mode similar to the dielectric waveguide resonators of the above-described embodiments.
The dielectric waveguide resonators 24a to 24i include: a dielectric body in a rectangular parallelepiped shape having 9 regions formed by providing a plurality of slits 34; and a pair of input/output electrodes 54 and a conductive film formed on the outer surface of the dielectric. The dielectric waveguide resonators 24a to 24i may be connected via the formation portion of the slot 34.
Fig. 8 is a partially enlarged bottom view showing a detailed structure of the formation portion of the input/output electrode 54. The conductor non-formation portions 64a1, 64b1, 64c1, 64d1, 64a2, 64b2, and 64c2 are provided on the bottom surface of the rectangular parallelepiped dielectric body, respectively. (in fig. 7B, these conductor non-formation portions are collectively referred to as a conductor non-formation portion "64") the conductor non-formation portions 64a1, 64a2 extend from one side surface of the dielectric in a direction perpendicular to the side surface. The conductor non-formation portions 64b1, 64b2 extend in an oblique (45 °) direction. The conductor non-formation portions 64c1 extend in a direction orthogonal to the side surfaces, and the conductor non-formation portions 64c2 and 64d1 extend along the side surfaces, respectively. The conductor non-formation portions 64c1, 64c2, and 64d1 are examples of the "non-parallel extension portions" of the present invention. In the present embodiment, the non-parallel extending portions are asymmetric shapes in which the extending lengths of the 2 conductor non-forming portions are different.
The input/output electrode portion 54a is a strip-shaped portion sandwiched between the conductor non-formation portions 64a1, 64a2, and the input/output electrode portion 54b is a strip-shaped portion sandwiched between the conductor non-formation portions 64b1, 64b 2. The input/output electrode portion 54c is a triangular portion sandwiched between the conductor non-formation portions 64c1 and 64c 2. The input/output electrode portion 54d is the remaining portion of the triangular portion 54c among the rectangular portions sandwiched between the conductor non-forming portion 64d1 and the conductor non-forming portion 64c 2. (in FIG. 7A, the input/ output electrode sections 54a, 54b, 54c, and 54d are collectively referred to as "input/output electrodes 54")
As shown in this example, the input/output electrodes may be asymmetrical to the left and right about the extending direction. In addition, as shown in this example, the extension amounts of the 2 conductor non-formation portions may be unbalanced. The value of the external Q can be made smaller as the total amount of the extension of the 2 conductor non-formation portions is larger.
The input/output structure of the dielectric waveguide resonator tube 24h is the same as that of the dielectric waveguide resonator 24b, except that it has a symmetrical shape.
As described above, the input/output electrode 54 protrudes from the first end of the bottom surface of the predetermined region out of the plurality of regions formed by the narrowed portion (narrowed portion) of the dielectric medium, which is the apex or the vicinity of the apex, into the plane of the bottom surface. Here, the phrase "near the apex of the bottom surface of the predetermined region" means, for example, a distance range of less than 1/4 of the extension length of the input/output electrode 54. The "predetermined region" refers to a region of the dielectric waveguide resonator that performs input and output. The fact that the input/output electrode 54 is a conductor non-formation portion along the periphery of the first end means that the starting point of the input/output electrode 54 in the extending direction is separated from the conductor film.
The input/output electrode 54 is not limited to one extending from the vicinity of the vertex of the predetermined region. The apex may also be referred to as the "first end" of the invention, from which it projects into the plane of the base surface.
Of the dielectric waveguide resonators 24a to 24i, the dielectric waveguide resonators 24a and 24i at both ends are coupled with a phase difference of 1/4 wavelength with respect to the input/output section. Therefore, the dielectric waveguide resonators 24a and 24i each function as a trap resonator. The dielectric waveguide resonators 24b to 24h function as a bandpass filter composed of cascade-connected 7-stage resonators.
The size (the size of the resonance space) of the dielectric waveguide resonator 24a is different from that of the dielectric waveguide resonator 24 i. The size (the size of the resonance space) of the dielectric waveguide resonator 24b is also different from that of the dielectric waveguide resonator 24 h.
Here, between the dielectric waveguide resonator 24b and the dielectric waveguide resonator 24a, 1 slot 34a is formed not on both side surfaces of the dielectric but on one side surface. Similarly, 1 slot 34i is formed on one side surface between the dielectric waveguide resonator 24h and the dielectric waveguide resonator 24 i. The slots 34a and 34i are larger (deeper in this example) than the slots 34 between the other dielectric waveguide resonators. Thus, the conductor non-formation portion 64 and the input/output electrode 54 can be arranged near the corner of the resonance space without being affected by the gap.
The dielectric waveguide resonators 24a to 24i are coupled in the order of dielectric waveguide resonator 24b → 24c → 24d → 24e → 24f → 24g → 24h through the window formed by the slot 34. In addition, the dielectric waveguide resonators 24a and 24b are coupled through a window formed by the slot 34 a. Likewise, the dielectric waveguide resonators 24h and 24i are coupled through a window formed by the slot 34 i.
Fig. 9 is a plan view showing a connection structure between the printed circuit board and the dielectric waveguide filter 14. The printed substrate 84 includes: lines 94a and 94B having distal end portions formed in substantially the same shapes as those of the input/output electrodes 54 (see fig. 7B); and a ground pattern 94 c. A plurality of through holes 104 for connecting the ground pattern 94c on the upper surface and the ground pattern on the lower surface are arranged on both sides of the wiring 94 a. A plurality of through holes 104 for connecting the ground pattern 94c on the upper surface and the ground pattern on the lower surface are also arranged on both sides of the wiring 94 b.
The tips of the lines 94a and 94b on the printed board 84 are connected to the input/output electrodes 54 of the dielectric waveguide filter 14, respectively, and the ground pattern 94c on the printed board 84 is connected to the conductive film of the dielectric waveguide filter.
The lines 94a and 94b and the ground patterns on the upper and lower surfaces form a ground coplanar line.
Fig. 10 is a diagram showing the frequency characteristics of the insertion loss and the reflection loss of the dielectric waveguide filter 14 according to the present embodiment. The required characteristics of the dielectric waveguide filter are as follows, for example.
[ pass band ]
Passband bandwidth: plus or minus 0.425GHz of central frequency fo
Insertion loss in the pass band: less than-1.5 dB
Reflection loss in pass band: less than-15 dB
[ stop band ]
-40dB attenuation bandwidth: center frequency fo is higher than-0.775 GHz and lower than +0.775GHz
Insertion loss in the attenuation band: less than-40 dB
Here, the center frequency fo is, for example, several tens GHz.
The dielectric waveguide filter 14 of the present embodiment satisfies the above-described requirements, as shown in fig. 10.
Fifth embodiment
In the fifth embodiment, a dielectric waveguide filter including a notch filter and having dielectric waveguide resonators arranged in 2 rows and a mounting structure thereof are shown.
Fig. 11 is a perspective view showing dielectric waveguide filters 15a and 15b and a mounting structure thereof according to a fifth embodiment. Fig. 12 is a bottom perspective view of the dielectric waveguide filters 15a and 15b and a perspective view of the printed circuit board.
The dielectric waveguide filter 15a shown in fig. 11 includes 5 dielectric waveguide resonators 25a, 25b, 25c, 25d, and 25 e. The dielectric waveguide filter 15b includes 5 dielectric waveguide resonators 25f, 25g, 25h, 25i, and 25 j. These dielectric waveguide resonators 25a to 25j are electromagnetically coupled in a U shape.
Input/output structure portions 55Pa and 55Pb similar to those of the input/output structure portion composed of the input/output electrode and the conductor non-formation portion shown in fig. 8 are formed on the bottom surfaces of the dielectric waveguide resonators 25b and 25 i. Further, conductor non-formation portions 66a and 66b are provided on the lower surfaces of the dielectric waveguide resonators 25e and 25 f.
The printed board 85 is provided with substrate-side input/output structure portions 95Pa and 95Pb facing the input/output structure portions 55Pa and 55 Pb. Substrate-side conductor non-forming portions 166a and 166b are provided so as to face the conductor non-forming portions 66a and 66 b.
In the mounted state of the dielectric waveguide filters 15a and 15b, the input/output structure portions 55Pa and 55Pb of the dielectric waveguide resonators face the substrate-side input/output structure portions 95Pa and 95Pb on the printed substrate 85, and the conductor non-forming portions 66a and 66b of the dielectric waveguide resonators face the substrate-side conductor non-forming portions 166a and 166 b.
The dielectric waveguide resonators 25b to 25i are coupled in the order of dielectric waveguide resonator 25b → 25c → 25d → 25e → 25f → 25g → 25h → 25i through the window formed by the slot 35. In addition, the dielectric waveguide resonators 25a and 25b are coupled through a window formed by the slot 35 a. Likewise, the dielectric waveguide resonators 25i and 25j are coupled through a window formed by the slot 35 j.
The dielectric waveguide resonators 25e and 25f are coupled to the substrate-side conductor non-formation portions 166a and 166b and the conductor non-formation portions 66a and 66b of the dielectric waveguide resonators.
Sixth embodiment
In the sixth embodiment, an example of a dielectric waveguide filter in which 2 dielectric waveguide resonators in different columns are not coupled to each other through a substrate is shown.
Fig. 13 is a perspective view showing dielectric waveguide filters 16a and 16b and a mounting structure thereof according to a sixth embodiment. Fig. 14 is a bottom perspective view of the dielectric waveguide filters 16a and 16b and a perspective view of the printed substrate 86.
The dielectric waveguide filter 16a shown in fig. 13 includes 5 dielectric waveguide resonators 26a, 26b, 26c, 26d, 26 e. The dielectric waveguide filter 16b includes 5 dielectric waveguide resonators 26f, 26g, 26h, 26i, and 26 j. These dielectric waveguide resonators 26a to 26j are electromagnetically coupled in a U shape.
Input/output structure portions 56Pa and 56Pb similar to those of the input/output structure portion based on the input/output electrode and the conductor non-formation portion shown in fig. 8 are formed on the bottom surfaces of the dielectric waveguide resonators 26b and 26 i. Further, conductor non-formation portions 67a and 67b are formed on the side surfaces of the dielectric waveguide resonators 26e and 26f, respectively.
The printed board 86 is provided with substrate-side input/output structure portions 96Pa and 96Pb facing the input/output structure portions 56Pa and 56 Pb.
In a state where the dielectric waveguide filters 16a and 16b are mounted on the printed substrate 86, the input/output structure portions 56Pa and 56Pb of the dielectric waveguide resonators are connected to the substrate-side input/output structure portions 96Pa and 96Pb on the printed substrate 86. The dielectric waveguide resonators 26e and 26f are coupled with the conductor non-formation portions 67a and 67b facing each other.
Seventh embodiment
In the seventh embodiment, an example of a large-scale multiple-input multiple-output system having a dielectric waveguide filter is shown.
One of the promising wireless transmission technologies in 5G (fifth generation mobile communication system) is a combination of virtual cellular (phantom cell) and a large-scale mimo system. The virtual cell is a network structure for separating a control signal for securing stability of communication from a data signal to be subjected to high-speed data communication between a low-frequency macro cell and a high-frequency small cell. Each virtual cell is provided with a Massive multiple input multiple output (Massive MIMO) antenna device. The large-scale mimo system is a technique for improving transmission quality in a millimeter wave band or the like, and controls signals transmitted from each antenna element to control directivity. In addition, by using a plurality of antenna elements, a beam with sharp directivity is generated. By increasing the beam directivity, radio waves can be propagated to a certain extent to a remote place even in a high frequency band, and interference between cells can be reduced to improve the frequency use efficiency.
Fig. 15 is a top view of the antenna device 1 used in the large-scale mimo system. The antenna device 1 includes a plurality of patch antennas (patch antennas) 2 arranged in a row and a column.
Fig. 16 is a diagram showing the configuration of the antenna device 1 and the configuration of a front-end circuit connected thereto. The band pass filter BPF1 is connected to the patch antenna 2. A switch SW is connected between the band pass filter BPF1 and the power amplifier PA and the low noise amplifier LNA. The low noise amplifier LNA is connected to a reception signal input section of the baseband IC. A mixer MIX and a band pass filter BPF2 are connected between the transmission signal output unit of the baseband IC and the power amplifier PA. The local oscillator OSC is connected to the mixer MIX.
The band pass filter BPF1 passes the transmission/reception band and removes other frequency components. The switch SW switches between a transmission signal and a reception signal. The band pass filter BPF2 passes the frequency band of the transmission signal and removes other frequency components.
The dielectric waveguide filters described in the first to sixth embodiments can be used as the band pass filters BPF1 and BPF 2.
Since the dielectric waveguide filter of the present invention can be configured to be compact, the band pass filter BPF1 connected to the patch antenna 2 may be disposed on, for example, the back surface of the substrate on which the patch antenna 2 is formed. Thus, the antenna device 1 having the patch antenna 2 with the band pass filter BPF1 is configured.
Finally, the above description of the embodiments is by way of example in all respects and not by way of limitation. Modifications and variations will be apparent to those skilled in the art. The scope of the present invention is shown not by the above embodiments but by the claims. Further, the scope of the present invention includes modifications of the embodiments within the scope equivalent to the claims.
Claims (12)
1. An input-output structure of a dielectric waveguide, the dielectric waveguide comprising: a dielectric in the shape of a rectangular parallelepiped; an input/output electrode formed on the first surface of the dielectric; and a conductor film formed on an outer surface of the dielectric, the input/output structure of the dielectric waveguide being characterized in that:
a dielectric waveguide resonator is formed in the dielectric in a resonance region,
the dielectric waveguide resonator resonates in the TE mode,
the first face of the dielectric is the H-face of the dielectric waveguide,
the input/output electrode extends from a first end of the first surface of the dielectric member as a vertex toward a center of the first surface,
a conductor non-formation portion where the conductor film is not present is provided on both sides of the input/output electrode and around the first end.
2. An input-output structure of a dielectric waveguide, the dielectric waveguide comprising: a dielectric body in a rectangular parallelepiped shape having a plurality of regions formed by the narrowing portion; an input/output electrode formed on the first surface of the dielectric; and a conductor film formed on an outer surface of the dielectric, the input/output structure of the dielectric waveguide being characterized in that:
the plurality of regions are each a resonance region of the dielectric waveguide resonator,
the dielectric waveguide resonator resonates in the TE mode,
the first face of the dielectric is the H-face of the dielectric waveguide,
the input/output electrode extends from a first end of a first surface of a predetermined region among the plurality of regions, the first end being a vertex, in a direction toward a center of the first surface of the predetermined region,
a conductor non-formation portion where the conductor film is not present is provided on both sides of the input/output electrode and around the first end.
3. The input-output structure of a dielectric waveguide according to claim 1, wherein:
the conductor non-formation portion has non-parallel extension portions extending along two edges formed by the first surface and the remaining two surfaces of three surfaces of the dielectric body intersecting at the vertex, respectively.
4. The input-output structure of a dielectric waveguide according to claim 2, wherein:
the conductor non-formation portion has a non-parallel extension portion including: a portion extending in an arrangement direction of the plurality of regions; and a portion extending in a direction orthogonal to the arrangement direction.
5. The input-output structure of a dielectric waveguide according to claim 3 or 4, wherein:
the non-parallel extensions have different extension lengths.
6. The input-output structure of a dielectric waveguide according to claim 1 or 2, wherein:
the input/output electrode has a strip portion.
7. A mounting structure of a dielectric waveguide, comprising:
a dielectric waveguide having an input-output structure of the dielectric waveguide according to any one of claims 1 to 4; and a substrate on which the dielectric waveguide is mounted,
the substrate is provided on the surface with a line of a microstrip line structure or a coplanar line structure having a ground conductor,
a first end of the input-output electrode is connected to the wiring provided on the substrate,
the conductor film of the dielectric waveguide is connected to a ground conductor of the substrate.
8. A dielectric waveguide filter, characterized by:
an input-output structure having the dielectric waveguide according to any one of claims 1 to 4.
9. A dielectric waveguide filter, characterized by:
an input-output structure having the dielectric waveguide of claim 2 or 4,
the plurality of resonance regions are coupled by the narrowing,
among the plurality of resonance regions, a region located at an end of the dielectric member and adjacent to the resonance region where the input/output electrode is formed is a trap resonator.
10. The dielectric waveguide filter of claim 9 wherein:
the plurality of dielectric waveguide resonators are arranged in 2 rows, and of the plurality of regions, regions farthest from the region where the input-output electrode is formed are coupled to each other by a conductor non-formation portion.
11. A massive multiple-input multiple-output system, comprising:
the dielectric waveguide filter of claim 8; and
an antenna including a plurality of patch antennas arranged in a row and a column.
12. A massive multiple-input multiple-output system, comprising:
the dielectric waveguide filter of claim 9 or 10; and
an antenna including a plurality of patch antennas arranged in a row and a column.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-050462 | 2015-03-13 | ||
| JP2015050462 | 2015-03-13 | ||
| JP2015213250A JP6330784B2 (en) | 2015-03-13 | 2015-10-29 | Dielectric Waveguide, Dielectric Waveguide Mounting Structure, Dielectric Waveguide Filter, and Massive MIMO System |
| JP2015-213250 | 2015-10-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105977593A CN105977593A (en) | 2016-09-28 |
| CN105977593B true CN105977593B (en) | 2020-06-02 |
Family
ID=56984264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610139910.7A Active CN105977593B (en) | 2015-03-13 | 2016-03-11 | Input/output structure of dielectric waveguide and mounting structure of dielectric waveguide |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6330784B2 (en) |
| CN (1) | CN105977593B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018092453A1 (en) * | 2016-11-18 | 2018-05-24 | 株式会社村田製作所 | DIELECTRIC COMPOSITE FILTER, HIGH-FREQUENCY MODULE, HIGH-FREQUENCY FRONT-END CIRCUIT, COMMUNICATION DEVICE, AND Massive MIMO SYSTEM |
| WO2018096731A1 (en) * | 2016-11-22 | 2018-05-31 | 株式会社村田製作所 | Dielectric waveguide filter, high-frequency front-end circuit, communication device, massive mimo system, and adjustment method for dielectric waveguide filter |
| WO2018139321A1 (en) * | 2017-01-27 | 2018-08-02 | 株式会社村田製作所 | Dielectric waveguide filter, high-frequency front-end circuit, and communication device |
| CN109449546B (en) * | 2018-11-08 | 2023-09-29 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter and input/output structure thereof |
| KR102363472B1 (en) * | 2020-06-15 | 2022-02-16 | (주)파트론 | Waveguide Filter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002135003A (en) * | 2000-10-27 | 2002-05-10 | Toko Inc | Waveguide-type dielectric filter |
| CN2684389Y (en) * | 2004-03-23 | 2005-03-09 | 严盛喜 | Ultrahigh frequency conjoined multi-cavity patch filter |
| CN1969422A (en) * | 2005-01-18 | 2007-05-23 | 株式会社村田制作所 | Dielectric filter, dielectric duplexer, and communication apparatus |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000286606A (en) * | 1999-03-30 | 2000-10-13 | Toko Inc | Dielectric filter |
| JP2002043807A (en) * | 2000-07-31 | 2002-02-08 | Sharp Corp | Waveguide-type dielectric filter |
| JP3852598B2 (en) * | 2001-03-19 | 2006-11-29 | 宇部興産株式会社 | Dielectric filter and branching filter |
| JP3891918B2 (en) * | 2002-10-29 | 2007-03-14 | Ｔｄｋ株式会社 | High frequency module |
| WO2004045018A1 (en) * | 2002-11-07 | 2004-05-27 | Sophia Wireless, Inc. | Coupled resonator filters formed by micromachining |
| JP4105017B2 (en) * | 2003-04-04 | 2008-06-18 | 東光株式会社 | Waveguide type dielectric filter |
| US8823470B2 (en) * | 2010-05-17 | 2014-09-02 | Cts Corporation | Dielectric waveguide filter with structure and method for adjusting bandwidth |
-
2015
- 2015-10-29 JP JP2015213250A patent/JP6330784B2/en active Active
-
2016
- 2016-03-11 CN CN201610139910.7A patent/CN105977593B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002135003A (en) * | 2000-10-27 | 2002-05-10 | Toko Inc | Waveguide-type dielectric filter |
| CN2684389Y (en) * | 2004-03-23 | 2005-03-09 | 严盛喜 | Ultrahigh frequency conjoined multi-cavity patch filter |
| CN1969422A (en) * | 2005-01-18 | 2007-05-23 | 株式会社村田制作所 | Dielectric filter, dielectric duplexer, and communication apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6330784B2 (en) | 2018-05-30 |
| CN105977593A (en) | 2016-09-28 |
| JP2016171557A (en) | 2016-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105977593B (en) | Input/output structure of dielectric waveguide and mounting structure of dielectric waveguide | |
| US6577211B1 (en) | Transmission line, filter, duplexer and communication device | |
| KR20040036540A (en) | Dielectric mono-block triple-mode microwave delay filter | |
| CN112768908B (en) | Integrated structure of differential dielectric resonator antenna and independent controllable dual-passband filter | |
| CN109768357A (en) | A kind of substrate integral wave guide filter that transmission zero is controllable | |
| CN108448211A (en) | Slab Dielectric Waveguide terahertz filter | |
| JP5222952B2 (en) | Longitudinal radiation antenna system | |
| WO2017203918A1 (en) | Dielectric waveguide filter, high frequency front end circuit, and massive mimo system | |
| Mehrshahi et al. | Substrate integrated waveguide filters with stopband performance improvement | |
| KR100706532B1 (en) | DUAL BANDPASS FILTER USING lambda;/2 TYPE SIR RESONATOR | |
| Tang et al. | Differentially SIW TE 20-mode Fed substrate integrated filtering dielectric resonator antenna for 5G millimeter wave application | |
| CN111541018A (en) | High-gain steep filtering fusion duplex integrated antenna | |
| KR100521895B1 (en) | Lowpass Filter Using CPW Structure with Inductive Etched Hole | |
| JP4498297B2 (en) | Filter circuit | |
| CN114389002A (en) | SIW filtering power divider loaded with complementary step-folded split ring and design method | |
| US10651524B2 (en) | Planar orthomode transducer | |
| JP7360764B2 (en) | Bandpass filter and high frequency device equipped with the same | |
| EP1143552A1 (en) | Sheet-metal filter | |
| KR20070034316A (en) | Bandstop Filter Using Dual Lattice Structure | |
| US10270147B2 (en) | Dielectric waveguide, mounting structure for a dielectric waveguide, dielectric waveguide filter and massive MIMO system | |
| Ziboon et al. | Compact quad-band BPF design with fractal stepped-impedance ring resonator | |
| JP2000082902A (en) | Dielectric filter, dielectric duplexer and communication device | |
| Yang et al. | 60 GHz compact integrated cross-coupled SIR-MH bandpass filter on bulk CMOS | |
| US6326867B1 (en) | Dielectric filter having resonators arranged in series | |
| JP3750420B2 (en) | Planar filter, duplexer using the same, high frequency module using them, and communication device using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170224 Address after: Kyoto Japan Applicant after: Murata Manufacturing Co., Ltd. Address before: Saitama Prefecture, Japan Applicant before: Kochi Aki Co., Ltd. |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |