WO1993010570A1 - Folded strip track type dielectric resonator and laminated type dielectric filter using the same - Google Patents
Folded strip track type dielectric resonator and laminated type dielectric filter using the same Download PDFInfo
- Publication number
- WO1993010570A1 WO1993010570A1 PCT/JP1992/001377 JP9201377W WO9310570A1 WO 1993010570 A1 WO1993010570 A1 WO 1993010570A1 JP 9201377 W JP9201377 W JP 9201377W WO 9310570 A1 WO9310570 A1 WO 9310570A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dielectric
- electrode
- resonator
- outer peripheral
- shaped
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/08—Strip line resonators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
Definitions
- the present invention relates to a dielectric resonator having a three-dimensional strip line formed on a dielectric substrate, and a dielectric filter using the dielectric resonator.
- the resonator is configured as a strip line as a filter for the microphone mouth wave.
- a linear stripline type resonator conductor is provided on the dielectric substrate, one end of which is open, and the other end is short-circuited to the ground electrode.
- the configuration is as follows.
- the length of the resonator conductor is set to an odd multiple of one to four wavelengths of the resonance wavelength.
- the resonator conductors described above are arranged on a dielectric substrate and the short-circuit side is connected in common, and the distance between adjacent resonator conductors is a predetermined value that provides a degree of coupling corresponding to the filter characteristics. Determine the distance.
- a resonator conductor formed on a dielectric substrate is formed into a hairpin structure (Japanese Patent Laid-Open Nos. Sho 62-193332 and 58-103). No. 202)
- a plurality of hairpin-shaped resonator conductors are arranged so as to be parallel-coupled to each other.
- a resonator conductor having a predetermined shape is arranged on the surface of the dielectric substrate. That is, the resonator conductors are arranged in a plane.
- a conductive paste is adhered in a predetermined shape on a dielectric substrate by a screen printing method, or a process of slightly depressing an electrode forming portion on the surface of the dielectric substrate so as to have a predetermined shape is performed. Fill the inside with conductive paste. Thereafter, the dielectric substrate is heated and the conductive paste is baked to form a desired electrode pattern.
- Another example is a striped structure in which a thin conductive plate (resonator conductor) formed into a predetermined shape by punching or etching in advance is sandwiched between two dielectric substrates (see Japanese Patent Application Laid-Open No. H10-139,837). 5 7—2 0 4 6 0 2).
- the resonator conductors are arranged in a plane on the dielectric substrate, so that the area cannot be made very small.
- a filter is configured by connecting resonator conductors in multiple stages, even if the height dimension does not increase, it must inevitably become larger in a plane.
- the shape of the resonator pattern formed by screen printing generally has poor printing accuracy and changes in frequency and coupling, so trimming is required.
- the conductive material adheres to unnecessary portions, and must be removed, which requires a complicated operation. .
- An object of the present invention is to provide the disadvantages of the prior art as described above, namely, the problem of variations in electrode dimensions due to screen printing, the difficulty of applying a conductive paste to recesses, and the use of a conductive plate in a striped structure.
- An object of the present invention is to provide a strip line type dielectric resonator which can solve the problem caused by the thickness of the electrode, is suitable for miniaturization, and is easy to incorporate into a circuit.
- the present invention uses a dielectric substrate having a cut-out portion formed in a part of a flat plate-like substrate and having a substantially U-shaped shape as a whole. Both main surfaces of the dielectric substrate and both ends of the cutout opening are used.
- This is a folded strip-line dielectric resonator in which electrodes are formed on the outer peripheral part except for one near the surface.
- the “principal surfaces” of the dielectric substrate refer to both sides of the dielectric substrate that look almost u-shaped.
- the “cut portion” is not limited to the case where the substrate is actually cut mechanically, but means a state in which a concave portion is formed in a part of the substrate as a result.
- an independent island-shaped electrode is formed on the outer peripheral surface near the non-electrode end surface of both end surfaces of the cut opening,
- the island electrodes are used as input / output coupling electrodes. It is also effective to form the wall surface of the cut portion formed on the dielectric substrate into a corrugated shape, or to fill the cut portion formed on the dielectric substrate with a separate dielectric material.
- stripline dielectric resonator Another example of a stripline dielectric resonator according to the present invention
- dielectric substrates are joined to both main surfaces of a dielectric resonator having the above-mentioned island-shaped electrodes (input / output coupling electrodes) to form a three-layer sandwich structure.
- Both dielectric substrates have a structure in which a ground electrode is provided on the outer peripheral surface except the vicinity of the island-shaped electrode of the dielectric resonator located on the inner side and on the main surface on the outer side.
- providing the above-described electrode structure using a rectangular-shaped dielectric substrate means that the strip line is bent in half. Of both end surfaces of the cutout, the side with the electrode formed is the short-circuit side, and the side without the electrode is the open side. Therefore, the length of the 1/4 wavelength strip line is reduced to less than half by folding, and as a result, the size is greatly reduced.
- this folded strip-line resonator is folded three-dimensionally, not in a plane as in the past, a plurality of resonators are arranged in the main surface direction (a coupling dielectric substrate is interposed between the resonators).
- a coupling dielectric substrate is interposed between the resonators.
- a flat dielectric substrate is used, an outer electrode formed in a ⁇ ⁇ shape on an outer peripheral surface excluding both main surfaces thereof, and a middle portion formed in a ⁇ shape inside the dielectric substrate.
- An electrode and a central electrode formed at the center of the dielectric substrate, and each of the electrodes is short-circuited on only one end on the outer peripheral surface of the dielectric substrate. It is a vessel.
- a u-type resonator part in which electrodes are formed on the outer peripheral part except for either one of the two main surfaces of the dielectric substrate, which has a cut-out part and is substantially u-shaped, and either end face near the both ends of the notch opening, and
- a U-shaped electrode is formed on the outer peripheral surface of a separate dielectric piece, and an internal resonator in which the central partial electrode is connected at only one end is assembled, and the internal resonator portion is the same as the U-shaped resonator portion.
- the electrode-free end face is aligned with the cut-out part and housed and integrated.
- Another object of the present invention is to provide a multilayer dielectric filter that can be downsized as a whole when forming a multi-stage filter, and that can be configured to be easily incorporated into a circuit of a mounting board.
- a folded strip-line type dielectric resonator substrate and a knot adjusting dielectric are alternately stacked in the thickness direction and integrated.
- This is a laminated dielectric filter.
- the dielectric resonator substrate has a structure in which a folded strip line is formed three-dimensionally in a portion except for both main surfaces of the dielectric substrate.
- the coupling adjusting dielectric has an electrode on the outer periphery.
- a plurality of the above-mentioned dielectric resonator substrates are laminated so that a coupling adjusting dielectric is interposed therebetween.
- An outer dielectric is provided further outside the dielectric resonator substrates located on both sides in the thickness direction.
- This outer dielectric has a structure in which an electrode is formed on the outer peripheral portion of the outer main surface. Independent island-shaped electrodes are formed on the outer portions of the dielectric resonator substrates located on both sides, and the island-shaped electrodes are used as input / output coupling electrodes.
- the folded strip-line type dielectric resonator described above has a substantially U-shape by forming a cut portion in a part thereof, for example.
- electrodes are formed on the outer peripheral portion except for either one of both main surfaces of the dielectric substrate and the vicinity of both end surfaces of the cut opening.
- the coupling adjusting dielectric has a structure in which an opening or a cut is formed in a part of the dielectric substrate to adjust the degree of coupling, in addition to a simple flat dielectric substrate.
- a non-conductive adhesive may be used instead of the substrate.
- the dielectric resonator substrate has a shape as if a strip line type electrode is three-dimensionally bent on the outer periphery or on the outer periphery and inside of the dielectric substrate. At one end of the outer peripheral surface, the non-electrode portion (the side where no electrode is formed) is the open side, and the side where the electrode is formed is the short-circuit side. Therefore, the length of the dielectric resonator substrate itself is greatly reduced because the length of the 1Z4 wavelength strip line is turned back to less than half.
- the coupling dielectric between the dielectric resonator substrates adjusts the coupling between the adjacent resonators according to the thickness, the shape and position of the opening and the cutout, and the like.
- the strip line is folded three-dimensionally instead of two-dimensionally as in the conventional case.
- Laminating via a substrate is advantageous in that a desired number of dielectric filters can be easily manufactured and extremely small in size.
- Still another object of the present invention is to provide, among the drawbacks of the prior art described above, the problem of variations in electrode dimensions due to screen printing, the difficulty of applying a conductive paste to recesses, and the problem of conductive properties in a triple plate structure.
- a slit for knot adjustment is formed in a dielectric rest resonator block having a folded strip line
- This is a dielectric break type that is divided into a plurality of folded strip-line dielectric resonators while maintaining the integrated state by this slit.
- the outer dielectric has electrodes on the outer major surface and at the outer periphery. Independent island electrodes are formed outside the dielectric resonators located at both ends, and these island electrodes are used as input / output coupling electrodes.
- the folded strip-line type dielectric resonator block includes, for example, both end faces of a dielectric block having a U-shaped cross section by forming a cut in the longitudinal direction of one side face.
- an electrode is formed in a portion except one of the two sides of the cut opening.
- a U-shaped outer electrode is formed on the outer peripheral surface excluding both end faces of an outer dielectric block having a U-shaped cross section, and a U-shaped electrode is formed inside the outer dielectric block.
- One A structure may be adopted in which a dielectric block is arranged and each of the above-mentioned electrodes is short-circuited on the outer peripheral surface of the dielectric block only on one side.
- the slit formed in the dielectric resonator block may be a gap or another dielectric may be inserted.
- a flat plate-shaped dielectric may be inserted, or an opening or a cut portion may be formed in a part of the dielectric plate and inserted.
- a dielectric material may be filled in place of the dielectric plate.
- FIG. 1 is a perspective view of a folded strip line dielectric resonator according to one embodiment of the present invention.
- FIG. 2 is a perspective view showing a case where an input / output coupling electrode is provided in the resonator shown in FIG.
- FIG. 3 is a perspective view showing a modification of the resonator shown in FIGS. 1 and 2.
- FIGS. 4 and 5 are modified examples of FIGS. 2 and 3, and are perspective views showing a configuration in which a dielectric material as a separate body is filled in a cut portion of the resonator.
- FIGS. 6A and 6B are perspective views of a dielectric resonator having a three-layer sandwich structure according to still another embodiment of the present invention.
- FIG. 7 is a graph showing the results of measuring the filter characteristics of the dielectric resonator having the three-layer sandwich structure shown in FIG. 5B.
- FIG. 8 and 9 are a perspective view and an exploded perspective view, respectively, of a dielectric resonator according to still another embodiment of the present invention.
- FIG. 10 is a perspective view of a modified example of the configuration shown in FIG. 8, in which an input / output coupling electrode is provided.
- FIG. 11 is an explanatory perspective view showing one example of a method for manufacturing a dielectric resonator according to the present invention.
- FIGS. 12A and 12B are perspective views of a three-layer sandwich structure in which separate dielectric substrates are arranged on both sides of the dielectric resonator shown in FIG. 10 respectively. .
- FIG. 13 is a graph showing the filter characteristics of the dielectric resonator having the three-layer sandwich structure shown in FIG. 12B.
- FIG. 14 is a perspective view showing a modified example of the structure shown in FIG. 6B, showing an assembly of a laminated dielectric filter, and is an example of a three-step filter.
- FIGS. 15A and 15B are perspective views showing an embodiment of a coupling adjustment dielectric substrate that can be employed in the present invention.
- FIG. 16 is a perspective view showing another embodiment of the laminated dielectric filter according to the present invention.
- FIG. 17 is an exploded perspective view of an integrated dielectric filter according to still another embodiment of the present invention, which is an example of a five-stage filter.
- FIG. 18 is a modified example of FIG. 17, and is a perspective view of a configuration in which a separate dielectric material is filled in the cut portion and the slit.
- FIG. 19 is a perspective view of an integrated dielectric filter according to still another embodiment, in which slits for coupling adjustment are provided at four locations of a folded strip-line dielectric resonator block. This figure shows a configuration in which a total of five dielectric resonators are formed and divided and connected in the longitudinal direction.
- FIG. 20 is an explanatory view showing a process of manufacturing the dielectric filter shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- a folded strip-line dielectric resonator according to the present invention is provided with a cutout 12 in a part of a dielectric substrate 10 to form a substantially rectangular shape.
- Both main surfaces 14 of dielectric substrate 1-0 (in this case, both upper and lower surfaces of dielectric substrate 10) and either end surface 15a, 15b of the cut opening (15b in the example shown) are attached.
- Electrodes 16 were formed on the entire outer peripheral part (the outer surface and the inner surface of the cut portion) except for the above.
- the dielectric substrate 10 is, for example, a sintered body of a high dielectric constant material for microphone mouth waves, such as a barium titanate-based material, which is usually used for a filter for microphone mouth waves.
- the electrodes 16 are formed by coating and baking a conductive paste.
- the electrode forming portion is shaded, and the non-electrode portion (that is, the portion where the dielectric substrate is exposed) is expressed as a pear-skin shape with fine dots. I have.
- FIG. 2 shows a case where an input / output combined electrode is provided in the folded strip-line dielectric resonator.
- an independent island-shaped electrode 18 is formed on the outer peripheral portion near the electrodeless end face 15b of the opening end faces 15a and 15b.
- an input / output combined electrode can be used as the island-shaped electrode 18.
- Such a folded strip-line dielectric resonator has As a result, it can be considered that a 1 Z 4-wavelength resonator in which a U-shaped electrode is formed on the outer surface of a long and thin rod-like dielectric is folded in half, and the dielectric material is effectively reduced. It is made smaller by using it.
- the above resonator structure is manufactured by first forming a U-shaped dielectric substrate.
- the dielectric substrate may be manufactured by forming an electrode on each one of the dielectric substrates. It is desirable to have a method of facilitating the shaku block, coating and baking an electrode material on a predetermined surface and a predetermined position on the outer periphery thereof, and cutting it at a predetermined thickness. By this method, a large number of dielectric resonators having the same characteristics can be easily mass-produced.
- a method of forming and firing a long block of U-shaped cross section in advance a method of forming a slit in a long block sintered body, There is a method in which a narrow plate is interposed, a wide plate is arranged on both sides, and glass is bonded.
- FIG. 3 shows another embodiment of the dielectric resonator according to the present invention. Except for the shape of the cutouts 12, it is basically the same as FIG. In this embodiment, the wall surface of the cut portion 12 is formed into a corrugated shape. As a result, the length of the electrode is increased by the amount of the waveform, and the size can be further reduced. C Also, as shown in FIG. 4 or 5, a separate body is formed in the cut portion 12. It is also effective to fill the dielectric material 20. This narrows the fractional bandwidth and improves Q. Also, the mechanical strength increases.
- FIG. 4 shows a case where the notch 12 is linear
- FIG. 5 shows a case where the notch 12 has a waveform.
- the separate dielectric material 20 to be filled into the recess 12 may be the same material as the dielectric substrate 10 or may be a different material. Further, it is needless to say that the configuration shown in FIGS. 3, 4, and 5 can be obtained by removing the island-shaped electrode 18.
- FIG. 6A and FIG. 6B show still another embodiment. No.
- another dielectric substrate 24 is disposed on each of the main surfaces of the dielectric resonator 22 having the island-shaped electrode 18 on the dielectric substrate 10, and each of the dielectric resonators 24 is arranged vertically. Joined as shown in Fig. B to form a three-layer sandwich structure.
- the dielectric resonator 22 has the same configuration as that shown in FIG. 2, but may have the configuration shown in FIG. 3 to FIG.
- the outer dielectric substrates 24a and 24b are provided with electrodes on the outer peripheral surface and the outer main surface except for the vicinity of the island electrodes 18 of the dielectric resonator 20 located on the inner side.
- the upper dielectric substrate 24a has an upper surface which is an entire electrode surface and a lower surface which is an electrodeless surface (surface on which the dielectric substrate is exposed), and a lower dielectric substrate 24b which is reverse.
- the upper surface is an electrodeless surface
- the lower surface is an entire electrode.
- FIG. 7 shows the results.
- Each electrode substrate is about 6.5 turns in length and width and about 1 female in thickness. This Yotsute center frequency of about 1.
- the band rejection filter characteristic of about 7 about d B attenuation is obtained. Since this is a prototype, the attenuation outside the band is not sufficient. It can be improved by the pole structure and how to draw out the leads.
- the electrodes were formed on the outer peripheral portion except for one of both main surfaces and the vicinity of both end surfaces of the cutout using a substantially U-shaped dielectric substrate as a result.
- the quarter-wavelength resonator conductor has been folded back to be less than half the length, which is significantly smaller. Since this folded strip line is folded back not three-dimensionally but three-dimensionally as in the past, a plurality of resonators are stacked to form a multi-stage filter. Since the size can be further reduced and the area occupied by the mounting can be reduced, it is advantageous for miniaturization of equipment. Furthermore, since the external electrode and the island-shaped electrode (input / output coupling electrode) can be surface-bonded to the circuit pattern of the mounting board, there is an advantage that the table can be easily set.
- FIG. 8 is a perspective view of a folded stripline type dielectric resonator according to still another embodiment of the present invention.
- a flat dielectric substrate 10 is used, and electrodes are formed on the outer peripheral surface (three surfaces) except for both main surfaces thereof to form a U-shaped outer electrode 16 a and the dielectric substrate 1.
- an intermediate electrode 16b formed in a U-shape in the same direction as the outer electrode 16a and a central electrode portion 17 formed in the center, and the respective electrodes 16a, 16b , And 17 are short-circuited by the short-circuit electrode 19 on the outer peripheral surface of the dielectric substrate at only one end.
- the dielectric substrate 10 is made of, for example, a barium titanate-based material, such as a microwave microwave filter commonly used for a microwave filter or the like. It is a sintered body of an electric conductivity material.
- the electrodes 16a, 16b, and 17 are formed by applying and baking a conductive paste.
- such a dielectric resonator can be manufactured, for example, by a combination of components as shown in FIG.
- a cut-out portion 12 is provided in a part of the dielectric substrate 10 to make the whole substantially ⁇ -shaped, and both main surfaces 14 of the U-shaped dielectric substrate 10 (here, both upper and lower surfaces of the dielectric substrate 10) and Electrodes 16 are formed on the entire outer peripheral portion (outer surface and inner surface of the cut portion) except for either end surface 15a or 15b (in this case, 15b) of both ends of the cut opening.
- Resonator section Prepare two separate dielectric pieces 20a and 20b. They are shaped so as to fit into the cutouts 12 of the dielectric substrate 10 when joined.
- a partial central electrode 17 is formed from one end of the joining surface of the two dielectric pieces 20a and 20b to the vicinity of the other end (not reaching the other end), and one of the dielectric pieces (here, 2 An electrode 32 is formed on the outer peripheral surface excluding one end surface of 0 b) to form an internal resonator. Then, the internal resonator portion is accommodated in the cutout portion 12 of the U-shaped resonance base with the electrode-free end faces aligned and integrated by glass bonding or the like. At this time, the electrode on the end face 15a of the notch opening of the ⁇ -shaped resonator section is electrically connected to the electrode on the end face of the dielectric piece 20a.
- FIG. 10 shows a case where an input / output coupling electrode is provided in the above-described resonator.
- an independent island electrode 18 may be formed on the outer peripheral portion near the electrode-free end face 15b.
- This island electrode 18 is an input / output electrode It can be used as Other configurations may be the same as those in the embodiment shown in FIGS. 8 and 9, and the same reference numerals are given to corresponding portions, and description thereof will be omitted.
- Such a folded strip-line dielectric resonator is a strip-line quarter-wave resonator in which W-shaped electrodes are formed on both the outside and the inside of an elongated rod-shaped dielectric. Can be regarded as being folded back in half, and is made smaller by effectively utilizing the dielectric material.
- the above-mentioned dielectric resonator may be manufactured by first forming a U-shaped dielectric substrate, forming electrodes on each of the substrates, and inserting a separately formed internal resonator.
- a long structure 40 having a cross section of the above-mentioned resonator structure is manufactured in advance, and it is shown at a position a—a indicated by a virtual line so as to have a predetermined thickness. Disconnect.
- the long structure 40 can be manufactured in various ways.
- a long block of U-shaped cross section made of a dielectric material (form a long block of U-shaped cross section in advance and sinter it, or cut and groove a long block sintered body. Etc.), and apply and bake the electrode material on a predetermined surface and a predetermined position on the outer periphery.
- the long block inside apply and bake an electrode material on predetermined positions of two dielectric substrates, and paste them together.
- the long block inside is fitted into a long block with a U-shaped cross section and integrated.
- Still another manufacturing method is to bond five dielectric substrates with a glass adhesive or the like, so that A long structure having a desired cross-sectional shape may be created each time.
- FIG. 12A and 12B show still another embodiment, and as shown in FIG. 12A, a dielectric resonator 22 having island-shaped electrodes 18 (first Separate dielectric substrates 24a and 24b are placed on both main surfaces of the dielectric resonator having the structure shown in Fig. 0, respectively, and are joined as shown in Fig. 12B to form a three-layer sand. Form a switch structure. Electrodes 34 are provided on the outer peripheral surface except for the vicinity of the island-shaped electrode 18 of the dielectric resonator 22 located on the inner side and the outer major surface on the dielectric substrates 24 a and 24 b located on the outer side.
- the upper dielectric substrate 24a has an electrode surface on the entire upper surface and a non-electrode surface on the lower surface where the dielectric substrate is exposed.
- the upper surface is a non-electrode surface and the lower surface is a full electrode o
- a dielectric resonator with the same three-layer sandwich structure as shown in Fig. 12B was prototyped and its filter characteristics were measured.
- Figure 13 shows the results.
- Each dielectric substrate has a length of about 10 crane (vertical direction of ⁇ ), about 2.8 width (width direction), a depth of about 9 ram in ⁇ -shaped notch, and a thickness of about 1 sq.m. It is.
- a band-stop filter characteristic with an attenuation of about 31 dB was obtained at a center frequency of about 576 MHz.
- the U-shaped outer electrode, the U-shaped middle electrode, and the center electrode are formed on the dielectric substrate, and each is short-circuited at one end only.
- the 1Z4 wavelength resonator conductor was folded back to have a length of less than half, and the size could be significantly reduced.
- the folded strip line is folded three-dimensionally instead of two-dimensionally as in the past, it is possible to further reduce the size of the field base, which consists of multiple resonators stacked to form a multi-stage filter. It is possible to reduce the occupied area when mounting, which is advantageous for miniaturization of equipment.
- the outer electrode and the island-shaped electrode input / output coupling electrode
- the table can be easily set.
- FIG. 14 shows another embodiment of the laminated dielectric filter according to the present invention.
- This embodiment shows a configuration example of a three-stage filter.
- This laminated dielectric filter is composed of a folded line dielectric resonator substrate 10a, 10b, 10c and two coupling adjusting dielectric substrates 42a, 42b alternately. This is a type of lamination in the thickness direction.
- the outer dielectric substrates 24a and 24b are arranged outside the dielectric resonator substrates 10a and 10b located on both sides in the thickness direction, and the respective dielectric substrates are positioned and fixed with an adhesive or the like. Combine and integrate.
- Separate island-shaped electrodes 18a and 18b are provided on the periphery of the dielectric resonator substrates 10a and 10b located at both ends near the non-electrode end faces, and these are used as input / output coupling electrodes. .
- Each of the dielectric resonator substrates 10a, 10b, and 10c has a structure in which a folded strip line is formed three-dimensionally in a portion other than both main surfaces.
- a cut 12 is formed in a part of the dielectric substrates 10a, 10b, 10c to make the whole substantially U-shaped, and the two major surfaces (that is, both front and back surfaces) and Notch opening Peripheral portion excluding either one near both end faces (outside face and An electrode 16 is formed on the inner surface of the cutout, and one of the end faces of the opening (the non-electrode side) is the open side, and the other electrode-formed side is the short-circuit side.
- the coupling adjusting dielectric substrates 42a and 42b have a structure in which electrodes 48 are formed on the outer peripheral surface of the dielectric substrate except for both main surfaces (excluding a part thereof). Further, the outer dielectric substrates 24a and 24b are formed by forming electrodes 44 on the outer main surface and the outer peripheral portion (excluding a part) of the dielectric substrate. The electrodes 48, 44 of the coupling adjusting dielectric substrates 42a, 42b and the outer dielectric substrates 42a, 42b are connected to the island electrodes 18a, 18b so as not to be connected thereto. The vicinity is an electrodeless part.
- the cut portions 12 of the template dielectric substrates 10a, 10b, 10c may be filled with a separate dielectric material (not shown) as in the embodiment of FIG. This increases Q and improves mechanical strength.
- FIGS. 15A and 15B show another embodiment of the coupling adjusting dielectric substrate that can be employed in the configuration of FIG.
- the coupling adjusting dielectric substrate 42 shown in FIG. 15A has a cut portion 50 formed in a part of the substrate.
- the coupling adjusting dielectric substrate 42 shown in FIG. 15B has an opening 54 formed in the center of the substrate.
- the electrodes are formed only on the outer peripheral portion of each substrate, and are not formed on the cutouts and openings. By adjusting the shape of these notches 50 and openings 54, the adjacent dielectric
- the degree of coupling between the body resonators is adjusted to control the filter characteristics. Apart from this, the coupling degree can be adjusted by changing the thickness of the dielectric substrate 42.
- FIG. 16 is a modification of FIG. This is also an example of a three-stage finalizer, and is basically the same as the configuration in FIG. 16 except for the dielectric resonator substrate.
- This laminated dielectric filter is composed of a folded strip line dielectric resonator substrate 10a, 10b, 10c and a coupling adjustment dielectric substrate 42a, 42b. b is alternately stacked in the thickness direction.
- outer dielectric substrates 24a and 24b are disposed on the dielectric resonator substrates 10a and 10b on both sides in the thickness direction, and the respective dielectric substrates are positioned and integrated with an adhesive.
- Independent island-shaped electrodes 18a and 18b are provided on the outer periphery of the outer dielectric resonator substrates 10 and 1 • b to provide input / output junction electrodes.
- the dielectric resonator substrates 10 a, 10 b, and 10 c are formed with cutouts in part to protect the whole, and both ends of the cutout opening are formed on both main surfaces of the dielectric substrate.
- An internal resonator portion formed and connected to the central partial electrode 17 only at one end is provided, and the internal resonator portion is accommodated in the cutout portion of the U-shaped resonator portion with the electrode-free end face portions aligned. It is integrated.
- Island electrodes 18a, 18b are provided on the dielectric resonator substrates 10a, 10Ob on both sides.
- the coupling adjustment dielectric substrate has the structure shown in FIGS. 15A and 15B. Good.
- FIG. 17 shows a configuration example of a five-stage filter according to still another embodiment of the present invention.
- This dielectric filter forms coupling adjustment slits 62a, 62b, 62c, 62d at four locations on a folded stripline dielectric resonator block 60.
- a total of five dielectric resonators 22a, 22b, 22c, 22d22e are divided and partially connected.
- the dielectric resonator block 60 has a cut-out portion 12 formed on one side surface (the right front surface in FIG. 17) of a rectangular parallelepiped dielectric, and has a substantially ⁇ -shaped cross section.
- the electrode 16 is formed on the outer peripheral portion (the outer surface and the inner surface of the cutout) except for one of the sides (the upper surface in FIG. 17) near both sides of the opening.
- Each of the slits 62a to 62d is formed from the side of the cut opening to a position beyond the deepest part of the cut 12.
- each of the dielectric resonators 22a to 22e has a structure in which a folded strip line is formed three-dimensionally on the outer peripheral portion, and is connected in the thickness direction.
- one of the end faces of the opening is on the open side, and the other electrode forming section is on the short-circuit side.
- the outer dielectrics 24a and 24b are arranged on both sides of the dielectric resonator prog 60, and are bonded and integrated.
- the outer dielectrics 24a and 24b are formed by forming electrodes 34 on the outer main surface and the outer peripheral portion (excluding a part) of the dielectric substrate. Peripheral parts near the end faces of the electrode-free dielectric resonators 22a and 22b located at both ends Separate island-shaped electrodes 18a and 18b are provided and used as input / output coupling electrodes.
- the electrodes 34 of the outer dielectrics 24a and 24b are not connected to the island electrodes 18a and 18b so that they do not conduct with the island electrodes 18a and 18b. Electrode part.
- the dielectric is a sintered body of a high dielectric constant material for microwaves, such as barium titanate, which is usually used for microwave filters as in the above-described embodiment.
- Each electrode is formed by, for example, applying and baking a conductive paste.
- FIG. 18 shows another embodiment of the present invention.
- the basic configuration is the same as that in FIG. 17, and the corresponding parts are denoted by the same reference numerals and description thereof will be omitted.
- a separate dielectric material 68 is filled in the cut portion and the slit.
- the separate dielectric material 68 may be the same as the material of the dielectric resonator block, or may be a different material.
- Q is increased as described above, and the mechanical strength is improved.
- a configuration in which a separate dielectric plate is inserted only in the slit may be employed. In that case, a structure in which an opening or a notch is formed in a part of the dielectric plate may be employed.
- Fig. 1 In the dielectric resonator block shown in Figs. 17 and 18, one dielectric resonator divided into slits is schematically shown as Fig. 1 which was first explained. become.
- the dielectric plate 10 is provided with a cut-out portion 12 to form a U-shape, and the outer peripheral surface (the outer surface and the cut-out surface) excluding one of both main surfaces and one of the cut end surfaces.
- the electrode 16 is formed on the inner surface of the insertion portion.
- a 1Z 4 wavelength resonator with a U-shaped electrode formed on the outer surface of a long and thin rod-like dielectric is folded in half, and a strip line type dielectric is obtained.
- the coupling between the stages is adjusted according to the width of the slit for adjusting the coupling, the characteristics of the dielectric material filled in the slit, and the like. Filter characteristics can be obtained.
- the degree of coupling between adjacent dielectric resonators is adjusted by adjusting the shape of these cut portions and openings, and a filter is formed. Control characteristics.
- FIG. 19 shows still another embodiment of the integrated dielectric filter.
- This is also a five-stage filter, and is basically the same as the configuration shown in FIG. 17 except for the structure of the dielectric resonator.
- coupling adjustment slits 62a to 62d are formed at four positions of a folded stripline type dielectric resonator block 60, and are formed in the longitudinal direction.
- a total of five dielectric resonators 22a to 22e are divided and connected.
- the dielectric resonator block 60 has a ⁇ -shaped outer electrode 16 formed on the outer peripheral surface excluding both end faces of the outer dielectric block 70 having a 7-shaped cross section.
- An inner dielectric block 20 having an intermediate electrode 16b formed in a mold and a central electrode 17 formed in the center is arranged and integrated, and each electrode is disposed on only one side of the outer surface of the dielectric block. With a short-circuited structure above is there.
- Each of the slits 62a to 62d is formed from the side of the notch opening to a position beyond the deepest part of the notch.
- each of the dielectric resonators 22a to 22e has a structure in which a folded strip line is formed three-dimensionally on the outer peripheral portion, and the dielectric resonators 22a to 22e are connected in the thickness direction.
- the (non-electrode side) is on the open side and the other (electrode formation side) is on the short-circuit side.
- the outer dielectrics 24a to 24b are arranged at both ends of the dielectric resonator block 4 ⁇ and bonded and integrated.
- the outer dielectrics 24a and 24b are formed by forming electrodes 34 on the outer main surface and the outer peripheral portion (except a part) of the dielectric plate.
- Independent peripheral electrodes 18a and 18b are provided on the outer periphery near the electrodeless end faces of the dielectric resonators 22a to 22e located at both ends, and these are connected to the human output coupling electrodes. I do.
- the electrodes 34 of the outer dielectrics 24a and 24b are non-electrode portions near the island-shaped electrodes 18a and 18b so as not to conduct.
- one dielectric resonator divided by a slit is schematically represented as shown in FIG. 8 described above.
- the electrode 16a is formed on the outer peripheral part except for either one of the two major surfaces of the dielectric substrate 10 and the vicinity of both end surfaces of the notch opening, in which a notch is formed in part and the whole is substantially U-shaped.
- the above-described internal resonator section is cut off from the U-shaped resonator section.
- the 1Z4 wavelength resonator can be regarded as a strip-line dielectric resonator folded in half.
- Such a dielectric resonator can be manufactured, for example, by the procedure shown in FIG. First, a long block 80 made of a dielectric material is prepared. In this case, a long block with a U-shaped cross section is formed and fired in advance, or a long block sintered body is cut into grooves, or a plurality of plate- or rod-shaped dielectric long blocks are used. Laminate to form a U-shaped cross section.
- the electrode 81 is applied to a predetermined surface of the outer periphery and at a predetermined position and is baked to obtain an external dielectric block 82.
- a central partial electrode 85 is formed on the opposing surface of the two dielectric plates 84a and 84b of the same shape, and the electrodes are formed on the outer side.
- the internal dielectric block 88 is formed and adhered to form an internal dielectric block 88 having the electrode 86 as a ⁇ -shaped electrode. Then, the internal dielectric block 88 is fitted into the cut portion of the external dielectric resonator block 82 and bonded and integrated. This is slit at a predetermined interval, and cut at a predetermined length corresponding to the dielectric resonator block, whereby dielectric filters can be easily mass-produced.
- Each of the above embodiments is a five-stage filter in which four slits are formed, but the present invention can of course be applied to any number of two or more stages. When a dielectric material is put into the slit, a film of conductive material is formed on the end face of the dielectric material and in contact Conduction with the electrodes of the dielectric resonator substrate is achieved.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/087,744 US5446430A (en) | 1991-11-12 | 1992-10-22 | Folded strip line type dielectric resonator and multilayer dielectric filter using the same |
KR1019930702093A KR930703715A (ko) | 1991-11-12 | 1992-10-22 | 접어진 스트립 선로형 유전체 공진기 및 그것을 사용한 적층형 유전체 필터 |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3/323759 | 1991-11-12 | ||
JP32375991A JPH05136613A (ja) | 1991-11-12 | 1991-11-12 | 折り返しストリツプ線路型誘電体共振器 |
JP3/339789 | 1991-11-28 | ||
JP33978991A JPH05152815A (ja) | 1991-11-28 | 1991-11-28 | 折り返しストリツプ線路型誘電体共振器 |
JP3/350050 | 1991-12-10 | ||
JP35005091A JPH05167307A (ja) | 1991-12-10 | 1991-12-10 | 積層型誘電体フィルタ |
JP35585291A JPH05175702A (ja) | 1991-12-21 | 1991-12-21 | 一体型誘電体フィルタ |
JP3/355852 | 1991-12-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993010570A1 true WO1993010570A1 (en) | 1993-05-27 |
Family
ID=27480309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1992/001377 WO1993010570A1 (en) | 1991-11-12 | 1992-10-22 | Folded strip track type dielectric resonator and laminated type dielectric filter using the same |
Country Status (5)
Country | Link |
---|---|
US (1) | US5446430A (ja) |
EP (1) | EP0566743A1 (ja) |
KR (1) | KR930703715A (ja) |
TW (1) | TW208760B (ja) |
WO (1) | WO1993010570A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU694232B2 (en) * | 1994-05-26 | 1998-07-16 | Immunex Corporation | Receptor for oncostatin M |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI94191C (fi) * | 1993-09-28 | 1995-07-25 | Verdera Oy | Koaksiaaliresonaattorirakenne |
US5621365A (en) * | 1994-02-18 | 1997-04-15 | Fuji Electrochemical Co., Ltd. | Laminated dielectric resonator and filter |
US5621366A (en) * | 1994-08-15 | 1997-04-15 | Motorola, Inc. | High-Q multi-layer ceramic RF transmission line resonator |
JP2897678B2 (ja) * | 1995-03-22 | 1999-05-31 | 株式会社村田製作所 | 誘電体共振器及び高周波帯域通過フィルタ装置 |
DE69729030T2 (de) * | 1996-07-15 | 2004-09-09 | Matsushita Electric Industrial Co., Ltd., Kadoma | Dielektrische Mehrschichtvorrichtung und dazugehöriges Herstellungsverfahren |
US5834994A (en) * | 1997-01-17 | 1998-11-10 | Motorola Inc. | Multilayer lowpass filter with improved ground plane configuration |
US5818313A (en) * | 1997-01-31 | 1998-10-06 | Motorola Inc. | Multilayer lowpass filter with single point ground plane configuration |
US5886597A (en) * | 1997-03-28 | 1999-03-23 | Virginia Tech Intellectual Properties, Inc. | Circuit structure including RF/wideband resonant vias |
SE514630C2 (sv) * | 1999-07-09 | 2001-03-26 | Ericsson Telefon Ab L M | Metod för framställning av mikrovågsfilter, samt mikrovågsfilter framställt enligt denna metod |
US20080272860A1 (en) * | 2007-05-01 | 2008-11-06 | M/A-Com, Inc. | Tunable Dielectric Resonator Circuit |
JP5061794B2 (ja) * | 2007-08-24 | 2012-10-31 | パナソニック株式会社 | 共振器とそれを用いたフィルタおよび電子機器 |
KR101295869B1 (ko) * | 2009-12-21 | 2013-08-12 | 한국전자통신연구원 | 복수의 절연층들에 형성된 선로 필터 |
US8258897B2 (en) | 2010-03-19 | 2012-09-04 | Raytheon Company | Ground structures in resonators for planar and folded distributed electromagnetic wave filters |
TWI499126B (zh) * | 2012-05-11 | 2015-09-01 | Wistron Corp | 可攜式電子裝置及其天線結構以及天線共振體單元 |
CN113839163B (zh) * | 2021-09-28 | 2022-03-25 | 西安理工大学 | 一种采用tsv技术的面对面结构小型化三维发夹滤波器 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60190002A (ja) * | 1984-03-09 | 1985-09-27 | Matsushita Electric Ind Co Ltd | ストリツプ線路共振器 |
JPS62193303A (ja) * | 1986-02-18 | 1987-08-25 | Matsushita Electric Ind Co Ltd | 高周波用共振器 |
JPS63127602A (ja) * | 1986-11-18 | 1988-05-31 | Murata Mfg Co Ltd | ストリツプラインフイルタ |
JPS63212202A (ja) * | 1987-02-27 | 1988-09-05 | Matsushita Electric Ind Co Ltd | 共振器 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57204602A (en) * | 1981-06-10 | 1982-12-15 | Fujitsu Ltd | Dielectric filter |
JPS58103202A (ja) * | 1981-12-16 | 1983-06-20 | Fujitsu Ltd | 誘電体フイルタ |
JPS6128201A (ja) * | 1984-07-18 | 1986-02-07 | Sony Corp | ストリツプ線路フイルタ |
US4812791A (en) * | 1986-02-18 | 1989-03-14 | Matsushita Electric Industrial Co. Ltd. | Dielectric resonator for microwave band |
JPH0290303A (ja) * | 1988-09-28 | 1990-03-29 | Fuji Electric Co Ltd | 時定数可変機能付ロボット制御装置 |
-
1992
- 1992-10-22 US US08/087,744 patent/US5446430A/en not_active Expired - Fee Related
- 1992-10-22 WO PCT/JP1992/001377 patent/WO1993010570A1/ja not_active Application Discontinuation
- 1992-10-22 KR KR1019930702093A patent/KR930703715A/ko not_active Application Discontinuation
- 1992-10-22 EP EP92922419A patent/EP0566743A1/en not_active Withdrawn
- 1992-11-02 TW TW081108707A patent/TW208760B/zh active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60190002A (ja) * | 1984-03-09 | 1985-09-27 | Matsushita Electric Ind Co Ltd | ストリツプ線路共振器 |
JPS62193303A (ja) * | 1986-02-18 | 1987-08-25 | Matsushita Electric Ind Co Ltd | 高周波用共振器 |
JPS63127602A (ja) * | 1986-11-18 | 1988-05-31 | Murata Mfg Co Ltd | ストリツプラインフイルタ |
JPS63212202A (ja) * | 1987-02-27 | 1988-09-05 | Matsushita Electric Ind Co Ltd | 共振器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0566743A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU694232B2 (en) * | 1994-05-26 | 1998-07-16 | Immunex Corporation | Receptor for oncostatin M |
Also Published As
Publication number | Publication date |
---|---|
US5446430A (en) | 1995-08-29 |
TW208760B (ja) | 1993-07-01 |
EP0566743A1 (en) | 1993-10-27 |
KR930703715A (ko) | 1993-11-30 |
EP0566743A4 (ja) | 1994-03-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1993010570A1 (en) | Folded strip track type dielectric resonator and laminated type dielectric filter using the same | |
JP2001168669A (ja) | 積層型デュプレクサ | |
JPH05308201A (ja) | ストリップラインフィルタ | |
JP2000082616A (ja) | 積層型フィルタ | |
EP1083620A2 (en) | Monolithic LC resonator and monolithic LC filter | |
JPH09148802A (ja) | 積層型バンドパスフィルタ | |
US5621365A (en) | Laminated dielectric resonator and filter | |
JP2721626B2 (ja) | 積層型誘電体フィルタ | |
JP2620840B2 (ja) | 同軸型積層誘電体フィルタの製造方法 | |
JPH03108801A (ja) | 誘電体フィルタ | |
JP2673854B2 (ja) | 折り返しストリップ線路型誘電体共振器及び誘電体フィルタ | |
JP3322929B2 (ja) | 積層バンドパスフィルタ | |
JPH05283906A (ja) | 積層型誘電体フィルタ | |
JP2732186B2 (ja) | 積層型誘電体フィルタの製造方法 | |
JPH05175702A (ja) | 一体型誘電体フィルタ | |
JP2762331B2 (ja) | 誘電体フィルタ | |
JP2568149B2 (ja) | 誘電体フィルタ及び誘電体分波器 | |
JP2666101B2 (ja) | 積層型誘電体フィルタ | |
JP2525311B2 (ja) | 誘電体共振器及び誘電体フィルタ | |
JPH05167307A (ja) | 積層型誘電体フィルタ | |
JP2666102B2 (ja) | 積層型誘電体フィルタ | |
JPH05136613A (ja) | 折り返しストリツプ線路型誘電体共振器 | |
JPH05152815A (ja) | 折り返しストリツプ線路型誘電体共振器 | |
JPH11136001A (ja) | 周波数特性が改善された積層型ストリップライン・フィルタ | |
JPH0677705A (ja) | 折り返しストリップ線路型誘電体共振器及び誘電体フィルタ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 08087744 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1992922419 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1992922419 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1992922419 Country of ref document: EP |