WO2002067358A1 - Filtre dielectrique - Google Patents

Filtre dielectrique Download PDF

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Publication number
WO2002067358A1
WO2002067358A1 PCT/JP2002/001530 JP0201530W WO02067358A1 WO 2002067358 A1 WO2002067358 A1 WO 2002067358A1 JP 0201530 W JP0201530 W JP 0201530W WO 02067358 A1 WO02067358 A1 WO 02067358A1
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WO
WIPO (PCT)
Prior art keywords
dielectric
input
electrode
output electrode
dielectric filter
Prior art date
Application number
PCT/JP2002/001530
Other languages
English (en)
Japanese (ja)
Inventor
Kouichi Kawamura
Ryuji Oyama
Original Assignee
Ube Industries, Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2001046034A external-priority patent/JP2002246808A/ja
Priority claimed from JP2002022785A external-priority patent/JP3801058B2/ja
Application filed by Ube Industries, Ltd. filed Critical Ube Industries, Ltd.
Publication of WO2002067358A1 publication Critical patent/WO2002067358A1/fr

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Classifications

    • 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
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • H01P1/2088—Integrated in a substrate

Definitions

  • the present invention relates to a small-sized dielectric filter which is suitable for use in a high frequency band of 5 GHz to 30 GHz and is formed by joining a plurality of dielectric resonators.
  • the present invention also relates to a small-sized dielectric filter which is suitable for use in a high frequency band from 5 GHz to 30 GHz and has a structure in which a plurality of dielectric resonators are formed in one dielectric block.
  • FIG. 1OA is a perspective view thereof
  • FIG. 1OB is an exploded perspective view thereof.
  • Each of the plurality of TE-mode dielectric resonators 20 has a rectangular parallelepiped dielectric block with conductor metallized on its surface, and has a metallized surface removed for coupling to other resonators.
  • a connection hole 22 having a circular or rectangular shape is formed.
  • An input / output electrode 26 formed by removing the surrounding metallization is provided on the surface coupled to the input / output terminal.
  • the input / output electrodes 26 provided at both ends of the dielectric filter are connected to the metallized peeling strip provided on the side of the dielectric block, and the upper end of the electrode is electrically connected to the metal coating on the upper surface, and the lower end of the electrode is metallized. It is formed so that it is in the middle of the stripping zone.
  • An L-shaped metal lead electrode 24 is attached to the input / output electrode 26 by soldering or the like.
  • the dielectric filter is coupled to an external circuit via the extraction electrode 24.
  • FIG. 25 shows a perspective view of this filter. This is because a plurality of through holes 80 are formed at predetermined intervals in a substantially rectangular parallelepiped dielectric block, and a required surface of the dielectric block including the inner surface of the through hole 80 is covered with a metal film. This is a dielectric filter that constitutes a TE101 mode dielectric resonator.
  • the input / output electrodes 65 provided at both ends of the dielectric filter 61 are connected to the metallized peeling band 64 provided on the side surface of the dielectric block, and the upper ends of the input / output electrodes are electrically connected to the metal film on the upper surface.
  • the lower end of the input / output electrode is formed in the middle of the metallized peeling strip.
  • An L-shaped metal lead electrode 73 is attached to the input / output electrode 65 by soldering or the like.
  • the dielectric filter 61 is coupled to an external circuit via the extraction electrode 73 and a signal line 71 on a mounting board connected to the extraction electrode 73.
  • the connection between the input / output electrode and the external circuit is made via a metal fitting that is a metal extraction electrode. For this reason, the number of components for external connection increases, and there is a concern that the variation (VSWR) with the external circuit may vary due to the variation in the metal connection.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide excellent substrate mountability, adjust the matching with an external circuit after mounting, and reduce electromagnetic wave leakage.
  • An object of the present invention is to provide a dielectric filter having input / output electrodes having efficient input / output coupling with reduced loss.
  • a dielectric filter having a mounting surface constituted by a surface on which each daland electrode is formed, wherein input and output electrodes are formed on dielectric resonators at both ends of an array of the dielectric resonators.
  • the dielectric resonators at both ends are provided on the surface thereof with input / output electrode constituent parts comprising the input / output electrodes and a dielectric block exposed part in contact with the input / output electrodes, and the input / output electrodes are provided on the mounting surface and the mounting surface.
  • the input / output electrode is formed continuously to one surface of the dielectric resonator at both ends adjacent to the mounting surface, and the input / output electrode is short-circuited to the ground electrode only at a portion most distant from the mounting surface.
  • the one surface on which the input / output electrode is short-circuited to the ground electrode is located at the foremost or rearmost position with respect to the direction of the arrangement of the dielectric resonators, and the direction of the arrangement is changed.
  • a portion of the input / output electrode that is short-circuited to the ground electrode is on an intersection line between the surface of the dielectric resonator opposite to the mounting surface and the one surface.
  • a portion of the input / output electrode that is short-circuited with the ground electrode is a portion of the dielectric resonator, the surface of the dielectric resonator being opposite to the mounting surface and a crossing line between the surface and the mounting surface. It is a position close to.
  • each of the dielectric resonators is configured using a separate dielectric block, and adjacent dielectric resonators have surfaces of the dielectric blocks facing each other. And are joined Are connected to each other via a connection formed on the surface of the opposing dielectric block.
  • the coupling portion is configured by a coupling hole that is a portion where the ground electrode is not formed on the surface of the individual dielectric block.
  • the plurality of dielectric resonators are configured using a common dielectric block, and adjacent ones of the dielectric resonators are connected to the common dielectric block. They are connected to each other via the formed connection.
  • the coupling portion is formed by forming a through hole or a notch in the dielectric block.
  • the dielectric resonator is a TE mode resonator.
  • the dielectric filter is mounted on a mounting substrate having a substrate signal line connected to a portion of the input / output electrode on the mounting surface.
  • the present invention provides:
  • a TE mode dielectric filter having a plurality of dielectric resonators joined in series and having an input / output electrode configuration unit, a ground electrode, and a coupling unit,
  • the input / output electrode component comprises an input / output electrode and a dielectric block exposed portion in contact with the input / output electrode, and the input / output electrode component comprises a dielectric resonator at both ends of the dielectric filter.
  • the coupling part is formed in a joint surface of the dielectric resonators, and the ground electrode is formed on the surface of the dielectric block excluding the input / output electrode constituent part and the coupling part.
  • the input / output electrode is formed continuously over a mounting surface formed by the lower surface of the dielectric resonator and one side surface excluding the bonding surface, and only the upper end of the input / output electrode on the one side surface is the ground.
  • a dielectric filter characterized by being short-circuited to an electrode
  • a short-circuit point between the input / output electrode and the ground electrode is formed at a position lower than an upper end of a side surface of the dielectric resonator.
  • the present invention provides a method for manufacturing a semiconductor device, comprising: mounting the dielectric filter on an insulating substrate; and setting a substrate signal line formed on the insulating substrate and an input / output electrode of the dielectric filter.
  • the pole is electrically connected to the portion on the mounting surface.
  • a TE-mode dielectric filter in which a plurality of dielectric resonators are joined in series, wherein input / output electrodes are provided on the dielectric resonators at both ends of the dielectric filter.
  • the magnetic field coupling of the input / output electrodes on the side of the dielectric resonator and the electric field coupling on the mounting surface enable efficient input / output coupling, reducing the area of the exposed dielectric block and reducing electromagnetic wave
  • a low-loss filter with low leakage can be obtained.
  • the area of the dielectric block exposed part can be further reduced, resulting in a low-loss filter. be able to.
  • the present invention provides:
  • a plurality of resonators are formed in one dielectric block having a substantially rectangular parallelepiped shape, and an input / output electrode configuration unit including an input / output electrode and a dielectric block exposed portion in contact with the input / output electrode is provided.
  • a TE-mode dielectric filter having a ground electrode formed on the surface of the dielectric block excluding, and a coupling part for electromagnetically coupling the resonators to each other,
  • the input / output electrodes are formed continuously over a mounting surface formed by the lower surfaces of the resonators at both ends of the dielectric filter and one side surface adjacent to the mounting surface, and only the upper end of the input / output electrodes on the one side surface is provided. Has a short-circuit point that conducts to the ground electrode.
  • the short-circuit point is formed at a position lower than the upper end of the one side surface of the resonator at both ends of the dielectric filter.
  • the present invention provides a method for manufacturing a semiconductor device, comprising: mounting the dielectric filter on an insulating substrate; and setting a substrate signal line formed on the insulating substrate and an input / output electrode of the dielectric filter.
  • the pole is electrically connected to the portion on the mounting surface.
  • a TE mode dielectric filter in which a plurality of resonators are formed in one dielectric block having a substantially rectangular parallelepiped shape, wherein the dielectric filter is inserted from one side of the resonator at both ends of the dielectric filter to a mounting surface.
  • Adjustment with the external circuit after mounting can also be easily performed by cutting the input / output electrode portions formed on the side surfaces of the resonator. Furthermore, the input / output coupling can be performed efficiently by the magnetic field coupling of the formed input / output electrodes on the side surface of the resonator and the electric field coupling on the mounting surface of the input / output electrodes as well.
  • the area of the exposed portion can be reduced, and a low-loss filter with low electromagnetic wave leakage can be obtained.
  • the short-circuit point between the input / output electrode and the ground electrode below the upper end of the side surface of the dielectric resonator the area of the exposed dielectric block can be further reduced, and a low-loss filter can be obtained. it can.
  • FIG. 1A is an external view showing one embodiment of a dielectric film according to the present invention.
  • FIG. 1B is an exploded view of the dielectric filter of FIG. 1A.
  • FIG. 2 is a characteristic diagram of the dielectric filter of FIGS. 1A and 1B.
  • FIG. 3 is an external view showing another embodiment of the dielectric filter according to the present invention.
  • FIG. 4A is a diagram showing a method for measuring the Q u value of a dielectric resonator.
  • FIG. 4B is an external view of the dielectric resonator to be measured.
  • FIG. 4C is a diagram showing the loss of the dielectric resonator of FIG. 4B.
  • FIG. 4D is an external view of the dielectric resonator to be measured.
  • FIG. 4E is a diagram showing the loss of the dielectric resonator of FIG. 4D.
  • FIG. 5 is a characteristic diagram of one embodiment of the dielectric filter according to the present invention.
  • FIG. 6 is an external view showing a comparative dielectric filter in which input / output electrodes having no short-circuit point with the ground electrode are formed.
  • FIG. 7 is a characteristic diagram of the dielectric filter of FIG.
  • FIG. 8 is an external view showing an embodiment in which the dielectric filter according to the present invention is mounted on a substrate.
  • FIG. 8B is an exploded view of the dielectric filter mounted on the substrate of FIG. 8A.
  • FIG. 9 is a characteristic diagram of the dielectric filter mounted on the substrates of FIGS. 8A and 8B.
  • FIG. 1OA is an external perspective view showing a conventional dielectric filter.
  • FIG. 10B is an exploded view of the dielectric filter of FIG. 10A.
  • FIG. 11 is an external view showing an embodiment of the dielectric filter according to the present invention.
  • FIG. 12 is a characteristic diagram of the dielectric filter of FIG.
  • FIG. 13 is an external view showing another embodiment of the dielectric filter according to the present invention.
  • FIG. 14 is a characteristic diagram of the dielectric filter of FIG.
  • FIG. 15 is an external view showing a comparative dielectric filter in which input / output electrodes having no short-circuit point with the ground electrode are formed.
  • FIG. 16 is a characteristic diagram of the dielectric filter of FIG.
  • FIG. 17A is an external view showing an embodiment in which the dielectric filter according to the present invention is mounted on a substrate.
  • FIG. 17B is an exploded view of the dielectric filter mounted on the substrate of FIG. 17A.
  • FIG. 18 is a characteristic diagram of the dielectric filter mounted on the substrates of FIGS. 17A and 17B.
  • FIG. 19 is an external view showing another embodiment of the dielectric filter according to the present invention. is there.
  • FIG. 2OA is an external view showing another embodiment of the dielectric filter according to the present invention.
  • FIG. 20B is an external view showing another embodiment of the dielectric filter according to the present invention.
  • FIG. 20C is an external view showing another embodiment of the dielectric filter according to the present invention.
  • FIG. 21 is an external view showing another embodiment of the dielectric filter according to the present invention.
  • FIG. 22 is a characteristic diagram of the dielectric filter of FIG.
  • FIG. 23 is an external view showing another embodiment of the dielectric filter according to the present invention.
  • FIG. 24 is a characteristic diagram of the dielectric filter of FIG.
  • FIG. 25 is an external perspective view showing a conventional dielectric filter. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1A is a perspective view of an embodiment of a dielectric film according to the present invention after assembly
  • FIG. 1B is an exploded perspective view before assembly.
  • the dielectric filter 1 according to the present invention is formed in a form in which a plurality of TE mode dielectric resonators 2 are arranged in a line and connected (that is, joined in series).
  • Each of the plurality of TE mode dielectric resonators 2 has a rectangular parallelepiped dielectric block having a predetermined dimension and a conductor metallized on a surface thereof, and has a bonding surface to be bonded to another dielectric resonator.
  • a circular or rectangular coupling hole 3 composed of a non-metallized portion (metallized peeling portion or metallized removed portion) is provided as a coupling portion.
  • the dielectric resonator 2 has a rectangular parallelepiped shape like the dielectric block.
  • the dielectric resonators 2 at both ends are formed on the surface of the dielectric block.
  • the input / output electrode configuration part 6 composed of the input / output electrode 5 and the dielectric block exposed part 4 in contact with it has a mounting surface 9 formed by the lower surface of the dielectric resonator 2 and one side excluding the bonding surface (bonding)
  • the input / output electrode 5 is formed continuously in the input / output electrode configuration portion 6 on the mounting surface 9 and the side surface.
  • the input / output electrode 5 has a short-circuit point (actually a linear shape) 7 at the upper end of the side surface of the dielectric resonator 2 at both ends (ie, the position of the line of intersection with the upper surface of the side surface).
  • the input / output electrode 5 is short-circuited to the ground electrode 8 via only the portion most distant from the mounting surface 9.
  • the input / output electrode 5 is provided on the surface of the dielectric resonator 2 at both ends opposite to the bonding surface (that is, the side surface located at both ends of the array of dielectric resonators and crossing the direction of the array). Is formed.
  • the input / output electrodes 5 can also be formed on other side surfaces (excluding the bonding surface) of the dielectric resonator 2 at both ends other than the surface opposite to the bonding surface.
  • the dielectric filter having such a configuration is mounted on a mounting substrate 10 having a substrate signal line 11 provided on the surface of an insulating substrate, for example, as shown in FIGS.
  • the portion on the mounting surface 9 and the board signal line 11 provided on the board 10 are connected with a conductive adhesive such as solder.
  • a conductive adhesive such as solder.
  • the dielectric film 1 can be easily mounted on the substrate 10 without using a special part such as an L-shaped bracket for mounting.
  • a substrate ground electrode 12 is formed on the substrate 10, and the ground electrode 8 of the dielectric filter 1 is electrically connected to the substrate ground electrode 12 on the substrate 10.
  • the board ground electrode 12 may be formed on the back surface of the board.
  • the board ground electrode 12 and the ground electrode 8 of the dielectric filter 1 are connected to the through-hole or the board provided on the board 10. They are electrically connected through conductors formed on the side surfaces of the substrate 10.
  • the input / output coupling can be adjusted by removing a part of the input / output electrode 5 on the side of the dielectric block of the dielectric resonator.
  • the exposed area of the dielectric block made of dielectric ceramic is reduced to reduce the electromagnetic wave.
  • the magnetic field coupling by the electrode portion on the side surface of the dielectric resonator and the electric field coupling by the electrode portion on the mounting surface can be efficiently operated, and the loss can be reduced.
  • FIG. 3 shows a perspective view of another embodiment of the dielectric filter according to the present invention. Except for the input / output electrode pattern, it has the same configuration as the dielectric filter shown in Fig. 1A.
  • the difference from the embodiment of FIG. 1A is that the short-circuit point 7 between the input / output electrode 5 and the ground electrode 8 is below the upper end of the side surface of the dielectric resonator (that is, the mounting surface 9 (Position close to).
  • the mounting surface 9 Pierisition close to
  • FIG. 11 is a perspective view of one embodiment of the dielectric filter according to the present invention.
  • the dielectric filter 31 includes an input / output electrode 3 formed on a surface of a dielectric block by forming a plurality of resonators 32 in one dielectric block having a substantially rectangular parallelepiped shape.
  • An input / output electrode component 36 comprising a dielectric block exposed portion 34 in contact with the input / output electrode 3, a ground electrode 38 formed on the surface of the dielectric block excluding the input / output electrode component 36,
  • a TE mode dielectric filter having a coupling part 33 for electromagnetically coupling the resonators 32 with each other, wherein the input / output electrode constituent part 36, particularly the input / output electrode 35, is provided at both ends of the dielectric filter.
  • the dielectric filter 31 is the same as the dielectric block. It has a rectangular parallelepiped shape.
  • the dielectric resonator 32 also has a substantially rectangular parallelepiped shape.
  • a method for forming a resonator there is a method in which a notch (groove) or a through hole 50 is formed between the resonators 32 in the dielectric block, and the inner surface thereof is metallized with a conductor.
  • Fig. 11 shows an example in which a through hole 50 of a long hole metalized with a conductor is formed between two resonators 32
  • Fig. 19 shows a plurality of through holes 50 between two resonators 32. Is formed.
  • the structure for forming a plurality of resonators and for forming the electromagnetic field coupling between the resonators is not limited to the above-described through-hole, but may be provided with notches (grooves) as shown in FIGS.
  • FIG. 2OA is a filter having a structure in which a notch (groove) 60 is formed between two resonators 32 from both side surfaces.
  • FIG. 20B is a filter having a structure in which a notch (groove) 60 is formed on one side surface between two resonators 32.
  • FIG. 20C shows a filter having a structure in which notches (grooves) 60 are formed on the upper and lower surfaces of a dielectric block between two resonators 32.
  • the coupling portion 33 is formed as a portion having a reduced sectional area of the dielectric block by forming a through hole 50 or a notch 60 in the dielectric block. Even in a filter having such a structure, a similar effect can be obtained by adopting the electrode configuration of the present invention.
  • the input / output electrode component 36 is connected to the other side parallel to the signal traveling direction adjacent to the mounting surface of the resonator 32 at both ends (ie, FIG. 11, FIG. 1). 9 and in FIGS. 2OA to 20C, the side surface excluding the side surfaces at both ends of the dielectric block where the input / output electrode 35 is formed) and the mounting surface 3.9.
  • the dielectric filter having the above configuration is mounted on a mounting substrate 40 having a substrate signal line 41 provided on the surface of an insulating substrate as shown in FIGS. 17A and 17B, for example.
  • the portion on the mounting surface of the substrate 40 and the substrate signal line 41 provided on the substrate 40 can be connected and used with a conductive adhesive such as solder.
  • a conductive adhesive such as solder.
  • the dielectric film can be easily mounted on the substrate without using special parts such as L-shaped fittings.
  • a substrate ground electrode 42 is formed on the substrate 40, and the ground electrode 38 of the dielectric filter 31 and the substrate 40 are formed.
  • the upper substrate ground electrode 42 is electrically connected.
  • the substrate ground electrode 42 may be formed on the back surface of the substrate 40. In this case, the substrate ground electrode 42 and the ground electrode 38 of the dielectric filter 31 are connected to the through-hole provided on the substrate 40. It is electrically connected through a hole or a conductor formed on the side surface of the substrate 40.
  • the input / output coupling can be adjusted by partially removing the input / output electrode 35 on the side of the dielectric block of the dielectric resonator. Furthermore, the magnetic field coupling by the electrode portion on the side of the dielectric resonator and the electric field coupling by the electrode portion on the mounting surface can be efficiently operated, and an island-like shape having no short-circuit point as shown in FIG. Compared with a dielectric filter having input / output electrodes 35, the exposed area of the dielectric ceramic (dielectric block) for obtaining the same level of input / output coupling can be reduced, thereby reducing electromagnetic wave leakage, Loss can be reduced.
  • FIG. 13 is a perspective view of another embodiment of the dielectric filter according to the present invention. Except for the input / output electrode pattern, the configuration is the same as that of the dielectric filter shown in FIG. The difference from the embodiment of FIG. 11 is that the short-circuit point 37 between the input / output electrode 35 and the ground electrode 38 is located at the upper end of the side face of the dielectric block (that is, the side face of the resonator at both ends of the dielectric filter). It is below (ie, closer to the mounting surface 39 than the line of intersection of the side surface with the upper surface). Thereby, the area of the dielectric block exposed portion 34 formed on one side surface of the resonator can be further reduced, and as a result, the loss of the filter can be further reduced.
  • the short-circuit point 37 between the input / output electrode 35 and the ground electrode 38 is located at the upper end of the side face of the dielectric block (that is, the side face of the resonator at both ends of the dielectric filter). It is below (ie,
  • the cross-sectional area of the coupling portion between the dielectric resonators can be increased, and a wide-band filter can be formed.
  • the position of the short-circuit point 37 between the input / output electrode 35 and the ground electrode 38 on the side of the dielectric block (that is, the side of the resonator at both ends of the dielectric filter) is about 310 to 700 of the side height. This is more preferable because strong input / output coupling can be obtained and the exposed area of the dielectric block can be reduced appropriately.
  • FIG. 1A and FIG. 1B One embodiment of the present invention as shown in FIG. 1A and FIG. 1B. Is a dielectric A filter was manufactured as follows, and the characteristics of the filter were measured.
  • the present embodiment is a three-stage filter having a shape of 6.000 17.7 X 3 mmt. 6.00 X 6.00 X 3.00 mm t
  • Dielectric block is processed into dimensions corresponding to the frequency that forms the filter, and the coupling section, input / output electrode configuration section, and ground electrode are configured as follows.
  • the electrodes were formed in such a way as to form a TE mode resonator.
  • the I / O electrode component 6 with a width of 3 mm is set at the center on the side between the upper and lower sides of the resonator at both ends, and the I / O electrode 5 with a 1.5 mm line width is placed in the I / O electrode component 6. Formed.
  • the input / output electrode 5 having a width of 1.0: 11111 and a depth of Omm was formed in the input / output electrode configuration portion 6 having a width of 2.4 mm and a depth of 2.0 mm on the mounting surface 9.
  • the dielectric block exposed portion 4 was formed in the area other than the input / output electrode 5 in the input / output electrode configuration section 6 except for the upper end of the input / output electrode 5.
  • a 1.2 mm wide x 3 mm high dielectric block exposed part was provided at the center as a coupling part 3 between the upper and lower ends of the bonding surface of the resonator for coupling between the resonators.
  • a ground electrode 8 was formed on the surface of the dielectric film other than the input / output electrode forming part 6 and the coupling part. Finally, these resonators were joined with a conductive adhesive such as solder.
  • the relative dielectric constant ⁇ r of the used dielectric material was 37.
  • Figure 2 shows the characteristics of the fabricated filter.
  • Input / output electrodes are also provided on the filter mounting surface 9 to facilitate mounting on the board, and the input / output electrodes on the side allow fine adjustment after mounting, but a low-loss dielectric filter is used.
  • the reason for this was that the pattern of the input / output electrodes was reduced as in the present invention to reduce the area of the exposed dielectric block, and that the magnetic field coupling due to the electrode on the side surface and the electric field coupling due to the electrode on the mounting surface Seems to have worked efficiently.
  • Fig. 4A is a diagram showing a method of measuring the no-load Q (Clu value) of a dielectric resonator.
  • a sample having a dielectric block exposed portion (metalized peeling portion) formed on the side surface of a conductive plate is placed on a conductive plate.
  • sample A coaxial cable with a loop antenna was installed on both sides of, and high frequency was applied to measure the frequency characteristics, and the apparent no-load Q (lu value) was calculated.
  • Omm TE mode resonator in the 5-GHz band was peeled off at the center in the area of 1.5 mm width x 1.0 mm height
  • An electrode having the same shape as that of the resonator (Fig. 4B) and the electrode on the side of the resonator peeled off in the center area of 1.5 11 111 width and 3.0 mm height (Fig. 4D) was used.
  • Fig. 4C and Fig. 4E show the change and loss of the resonance frequency due to the electromagnetic wave leakage of each sample.
  • the resonance frequency when the electrode on the side of the 5.85 x 5.85 x 3.0 mm TE mode resonator in the 5 GHz band is peeled off at the center in a 1.5 mm wide XI. Is 571 2 MHz, whereas when peeled in the area of 1.5 mm width X 3.Omm height, it becomes 563 1 MHz, about 81 MHz lower, and at this time, the Qu value degrades from 1050 to about 650 did.
  • the apparent no-load Q (Cu value) measured is due to the intrinsic Q of the dielectric and the Q due to the electrode shape, and in this experiment, the same dielectric material was used. And the use of electrodes of the same material, the difference between the above measured values is due to the exposed area of the dielectric.The wider the exposed dielectric block, the greater the leakage of electromagnetic waves and the lower the insertion loss. It shows that it gets bigger.
  • an embodiment of a dielectric filter in which the short-circuit point 7 between the input / output electrode 5 and the ground electrode 8 is set at a position lower than the upper end of the side surface as shown in FIG.
  • the position of the short-circuit point 7 was set at a height of 1 to 3 on the side surface of the dielectric, and a three-stage filter having a size of 5.85 ⁇ 17.7 ⁇ 3 mmt was manufactured. 5.85 x 5.85 x 3 mm t
  • a dielectric block is machined to the dimensions corresponding to the frequency that forms the filter, and the coupling, input / output electrode configuration, and ground electrode are configured as follows. Electrodes were formed to form a TE mode resonator. A 3.3 mm wide XI.Omm height input / output electrode component 6 was set on the side of the resonator at both ends from the lower end of the side, and a 1.5 mm line electrode was formed on the input / output electrode component 6.
  • the dimensions of the mounting surface are 2.4 mm width
  • An input / output electrode 5 having a width of 1.5 mm and a depth of 2.5 mm was formed in the input / output electrode forming section 6 having a depth of 2.0 mm.
  • the dielectric block exposed portion 4 was formed in the area other than the input / output electrode 5 in the input / output electrode configuration section 6 except for the upper end of the input / output electrode 5 on the side surface.
  • a 1.5 mm wide x 3 mm high stripping band was provided at the center between the upper and lower ends of the bonding surface of the resonator as the coupling part 3 for coupling between the resonators.
  • a ground electrode 8 was formed on the surface of the dielectric filter other than the input / output electrode forming part 6 and the coupling part 3. Finally, these resonators were joined with a conductive adhesive such as solder. The relative permittivity & r of the dielectric material used was 37.
  • FIG. 5 shows the characteristics of the dielectric filter manufactured as described above. A center frequency of 5700 MHz, a 3 dB bandwidth of 230 MHz, and a peak insertion loss of 0.97 dB were obtained.
  • the dielectric block exposed part 4 of the input / output electrode configuration part of the dielectric filter of Example 2 has the same area and does not have a short-circuit point with the ground electrode as shown in FIG. A dielectric filter having a pattern of island-like input / output electrodes 5 was formed.
  • This comparative example is a three-stage filter having a size of 5.85 ⁇ 17.7 ⁇ 3 mmt. 5.85 x 5.85 x 3 mm 1
  • Dielectric block is processed into dimensions corresponding to the frequency that forms the filter, and the coupling section, input / output electrode configuration section and ground electrode section are configured as follows
  • the electrodes were formed as described above to form a TE mode resonator.
  • An I / O electrode component 6 with a width of 3.3 mm and a height of 1.0 mm is set on one side of the resonator at both ends from the lower end of the side, and 2.Omn ⁇ x O.
  • the input / output electrode 5 having a height of 75 mm was formed.
  • an I / O electrode 5 having a width of 1.5 mm and a depth of XI 2.5 mm was formed in an input / output electrode configuration section 6 having a dimension of 2.4 mm width ⁇ 2.0 mm depth.
  • An exposed part (coupling part 3) of 1. Omm width x 3 mm height was provided at the center between the upper and lower ends of the coupling surface of the resonator for coupling between the resonators.
  • a ground electrode was formed on the surface of the dielectric filter other than the input / output electrode forming part 6 and the coupling part 3. The exposed area of the dielectric block on the joint surface is The impedance was determined so that the impedance was 50 ⁇ .
  • these resonators were joined with a conductive adhesive such as solder.
  • the specific dielectric constant ⁇ r of the used dielectric material was 37.
  • FIG. 7 shows the characteristics of the dielectric filter shown in FIG. A center frequency of 5710 MHz, a 3 dB bandwidth of 10 OMHz and a peak point insertion loss of 2.06 dB was obtained. '
  • the input / output coupling is larger than that of the input / output electrode structure having no short-circuit point 7, and a dielectric filter having a wide specific bandwidth can be obtained.
  • the electrode structure of the present invention has a small input / output impedance and can have a large area of the coupling portion 3, so that a wide specific bandwidth can be obtained.
  • the insertion loss can be reduced.
  • the coupling portions 3 are configured to have the same area, the area of the exposed dielectric block 4 of the electrode structure of the present invention can be further reduced, and the insertion loss can be further reduced.
  • FIGS. 8A and 8B show an example in which the high-frequency dielectric filter of the present invention is mounted on a substrate, and the input / output electrodes on the filter mounting surface are electrically connected to the extraction electrodes formed on the substrate.
  • FIG. 8A is a diagram showing an embodiment in which a dielectric filter is mounted on a substrate
  • FIG. 8B is a diagram showing a substrate 10 on which a substrate signal line 11 and a substrate ground electrode 12 are formed and a dielectric
  • FIG. 3 is an exploded view showing a filter 1 separately.
  • the substrate 10 is a 10 ⁇ 20 ⁇ 0.4 mm 7-inch Teflon (registered trademark) substrate, on which the input / output electrodes of the dielectric filter 1 are connected as shown in FIG.
  • a substrate signal line 11 of 1.17 mm width serving as an extraction electrode connected to a circuit and a substrate ground electrode 12 connected to a ground electrode of a dielectric filter are formed.
  • a paste-like solder is applied on the substrate 10, and a dielectric filter is placed on the paste. By electrically bonding the poles and the substrate signal line 11 of the substrate with solder, a three-stage 22 GHz band dielectric filter was mounted on the substrate 10.
  • the dielectric filter used in the present example was a three-stage filter having a size of 3.00 ⁇ 8.88 ⁇ 1.5 mm t, and was manufactured as follows.
  • a dielectric block of 3.00 X 3.00 X 1.5 mm t was processed into dimensions corresponding to the frequency that forms the filter, and the coupling, input / output electrode configuration, and ground electrode were processed as follows.
  • the electrodes were formed so as to constitute a TE mode resonator.
  • a 1.5mm wide X O.5mm high I / O electrode component 6 is set from the lower end of the side face on the sides of the resonators at both ends, and the I / O electrode of a 0.9mm width line is set in the I / O electrode component 6. 5 formed.
  • An input / output electrode 5 having a width of 0.911111 and a depth of 0.7 mm was formed in the input / output electrode forming section 6 having a depth of Omm.
  • a 0.5 mm high exposed dielectric block was provided at the center.
  • a ground electrode was formed on the surface of the dielectric filter other than the input / output electrode forming part 6 and the coupling part.
  • these resonators were joined with a conductive adhesive such as solder.
  • the relative dielectric constant s r of the used dielectric material was 9.6.
  • Fig. 9 shows the characteristics of the dielectric filter installed on the substrate shown in Fig. 8 ⁇ .
  • a low input loss dielectric filter with a center frequency of 22200 MHz, a 3 dB bandwidth of 325 MHz, and a peak insertion loss of 1.98 dB was obtained.
  • the dielectric material (resonator) having the input / output electrode pattern of the present invention the input / output electrode portion on the mounting surface side and the substrate signal line are bonded by a conductive adhesive such as solder.
  • a conductive adhesive such as solder.
  • a dielectric filter as one embodiment of the present invention as shown in FIG. 11 was manufactured as follows, and the characteristics of the filter were measured.
  • This embodiment is a two-stage filter having a shape of 12.5 X 6.0 X 3. Omm.
  • a through hole 50 for 1.5 mm X 0.5 mm ⁇ (as shown in Fig. 11)
  • the maximum length in the direction is 1.5 mm, both ends are rounded with 0.5 ⁇ , and the length in the short side direction is 0.5mm.
  • the dimensions of such a shape will be indicated by the same notation method), and the structure has two resonators in one dielectric block.
  • a 2.4 mm wide x 3.0 mm high input / output electrode component 36 is set as shown in Fig. 11 between the upper and lower edges of the sides of both ends of the filter.
  • An input / output electrode 35 having a line width of 2 mm was formed, and exposed dielectric block portions 34 were formed on both left and right sides of the input / output electrode 35.
  • the upper end of the input / output electrode 35 is electrically connected to the ground electrode 38 of the resonator at the short-circuit point 37, and the lower end of the input / output electrode 35 is formed to extend to the mounting surface 39 which is the lower surface of the dielectric block. .
  • an input / output electrode 35 of 0.8 mm width x 0.6 mm depth is formed in the input / output electrode configuration part 36 of 2.4 mm width x 2.0 mm depth.
  • an exposed dielectric block 34 was formed around the input / output electrode 35 formed on the mounting surface 39.
  • the dielectric block exposed portion 34 was formed in the area other than the input / output electrode 35 in the input / output electrode configuration section 36.
  • a ground electrode 38 was formed on the surface of the dielectric filter other than the input / output electrode component 36, including a through hole 50 for forming an electromagnetic field coupling between steps.
  • the specific dielectric constant ⁇ r of the dielectric material (dielectric ceramic) used was 37.
  • Figure 12 shows the characteristics of the fabricated filter.
  • a low insertion loss dielectric filter with a center frequency of 5621 MHz, a 3 dB bandwidth of 175 MHz, and a peak insertion loss of 0.66 dB was obtained. From this, the no-load Q (Qu value) at Phil evening was 700.
  • the insertion loss of the filter is inversely proportional to the no-load Q (Qu value) of each resonator constituting the filter and inversely proportional to the bandwidth, and the insertion loss is evaluated independently of the filter value. Used as a characteristic.
  • a filter with a larger Qu value has a lower insertion loss and is an excellent filter.
  • Input / output electrodes are also provided on the filter mounting surface, facilitating mounting on the board, and low-loss dielectric filters can be constructed despite enabling fine adjustment after mounting using the side electrodes.
  • the reason is that the input / output electrode pattern is This is probably because the magnetic field coupling by the electrode on the side surface and the electric field yarn by the electrode on the mounting surface ; i.e., worked efficiently, and the area of the exposed portion of the dielectric block was kept small.
  • FIG. 13 shows an embodiment of a dielectric filter in which the short-circuit point 37 between the input / output electrode 35 and the ground electrode 38 is set at a position lower than the upper end of the side surface, as shown in FIG.
  • the position of the short-circuit point 37 is set to the height of 1 2 on the side surface of the dielectric block (1.5 mm from the mounting surface), and the size of 12.5 x 6.0 x 3.
  • Om mt A two-stage filter was fabricated.
  • a through hole 50 for forming an electromagnetic field coupling between the steps was formed with a size of 1.5 X 0.5 mm ⁇ .
  • a 2.4 mm wide XI 2.5 mm high I / O electrode component 36 is set on the side face of the resonator at both ends of the filter from the side of the mounting surface, and a 1.2 mm line is placed in the I / O electrode component 36.
  • An input / output electrode 35 having a width was formed.
  • an electrode having a width of 1.2 mm and a depth of 0.2 mm was formed as shown in FIG. 13 in an input / output electrode forming section 36 having a width of 2.4 mm and a depth of 2.0 mm. .
  • the dielectric block exposed portion 34 was formed in the area other than the input / output electrode 35 in the input / output electrode forming section 36.
  • a ground electrode 38 including a penetrated elongated hole 50 for forming an electromagnetic field coupling between steps was formed on the surface of the dielectric filter other than the input / output electrode forming portion 36.
  • the relative dielectric constant s r of the used dielectric material was 37.
  • FIG. 14 shows the characteristics of the dielectric film fabricated in this manner.
  • the center frequency was 5818 MHz
  • the 3 dB bandwidth was 168 MHz
  • the peak point insertion loss was 0.45 dB.
  • the calculated Clu value was 900.
  • the short-circuit point 37 with the ground electrode 38 can be obtained.
  • a filter having less electromagnetic wave leakage and a lower loss than the filter provided at the upper end of the side surface may be used. it can.
  • a filter having a desired bandwidth can be formed. For example, by increasing the through-hole of this embodiment to 2.5 mmX 0.5 ⁇ , the electromagnetic field coupling between the resonators is reduced, and a filter having a center frequency of 5528 MHz and a bandwidth of 56 MHz can be obtained.
  • the configuration of the dielectric filter of Example 5 was the same except for the input / output electrode components, and the input / output electrode components were short-circuited with the ground electrode as shown in FIG. A dielectric filter having a pattern of island-shaped input / output electrodes 35 not provided was formed. At this time, the same input / output impedance was used.
  • the input / output electrode configuration part 36 and the input / output electrode 35 of this comparative example are arranged on one side of the resonator at both ends of the dielectric filter. 36 and in it 1.
  • An input / output electrode 35 having a height of 0.8 mm was formed.
  • the input / output electrode component 36 having a size of 2.4 mm depth X 2.0 mm width and a 1.5 mm depth XI 2.2 mm width were inserted therein.
  • the output electrode 35 was formed.
  • FIG. 16 shows the characteristics of the dielectric filter of the embodiment shown in FIG. A center frequency of 5710 MHz, a 3 dB bandwidth of 100 MHz, and a peak insertion loss of 1.58 dB were obtained. The Qu value obtained from this was 500.
  • a filter can be obtained. That is, when the through-holes between the resonators are made the same and the area of the coupling portion 33 is made the same, the dielectric block exposure of the electrode structure of the present invention is performed.
  • the area of the protrusion 34 can be further reduced, and the insertion loss can be further reduced. Further, when the area of the dielectric block exposed portion of the input / output electrode component is the same, the electrode structure of the present invention has a small input / output impedance, a small through hole between the resonators, and an area of the coupling portion 33. Can be increased, so that a wide fractional bandwidth can be provided, and therefore, insertion loss can be reduced.
  • Example 6 shows that the high-frequency dielectric filter of the present invention is mounted on a substrate, and the input / output electrodes on the dielectric filter mounting surface are connected to the extraction electrodes formed on the mounting substrate. An example of electrical connection is shown.
  • FIG. 17A is a diagram showing an embodiment in which a dielectric filter is mounted on a substrate.
  • FIG. 17B is a diagram showing a substrate 40 on which a substrate signal line 41 and a substrate ground electrode 42 are formed. It is a figure which shows the phil evening 31 separately.
  • a 10mm X 20mm X 0.4mmt Teflon [registered trademark] substrate is used, on which a lead is connected to the input / output electrodes of the dielectric filter and connected to an external circuit as shown in Fig. 17B.
  • a paste-like solder is applied on the board, and a dielectric filter is placed on the paste, and the input / output electrodes on the mounting surface of the dielectric filter and the board signal line 41 of the board are electrically connected by soldering using a riff opening furnace.
  • soldering By bonding, a two-stage dielectric filter of 22 GHz band was mounted on the substrate 40.
  • the dielectric filter used in this embodiment is a two-stage filter having a size of 3.0 OmmX8.88 mmX1.5 mmt, and a dielectric ceramic having a relative dielectric constant of 9.6 is used.
  • the size of the through hole 50 is 0.75 mm X 0.5 ⁇ , and the size of the input / output electrode component 36 on the side surface is 1.5 mm width ⁇ 0.7 mm height.
  • the size of the electrode 35 is 0.5 mm line width, and on the mounting surface, the I / O electrode component 36 has a 1.4 mm width XI.0 mm depth, and the I / O electrode 35 has a 0.8 mm width X It was formed with a size of 0.6 mm depth.
  • Fig. 18 shows the characteristics of the dielectric filter installed on the substrate shown in Fig. 17A. With a center frequency of 2235 OMHz and a 3 dB bandwidth of 450 MHz, The insertion loss at the break point was 1.10 dB. The Qu value obtained from this was 850, and a dielectric filter with small insertion loss was obtained.
  • the dielectric filter can be easily manufactured. It can be seen that a dielectric filter with low insertion loss can be easily obtained even when mounted on a substrate.
  • FIG. 21 shows an embodiment in which the structure shown in FIG. 19 is applied to a three-stage fill.
  • a three-stage filter with the shape of 1 1.73 mmX 4.
  • Ommt is formed.
  • Omm height is set from the side of the mounting surface, and a 0.7 mm line is An input / output electrode 35 having a width was formed.
  • an input / output electrode 35 having a depth of 1.5 mn ⁇ 0.9 mm was formed in an input / output electrode forming section 36 having a width of 2.4 mm and a depth of 1.5 mm.
  • This three-stage filter is mounted on a 1 OmmX 20 mm X 0.4 mm t Teflon (registered trademark) substrate with signal lines and ground electrodes formed on the surface, and a 1.17 mm signal line on the substrate is mounted.
  • the portion of the input / output electrode 35 on the mounting surface of the filter was electrically short-circuited with solder.
  • FIG. 22 shows the characteristics of the dielectric filter manufactured as described above.
  • the center frequency was 1161 OMHz, the 3 dB bandwidth was 78 MHz, and the peak point loss was 2.79 dB.
  • the Qu value obtained from this is 1 050, which is larger than the conventional Qu value of Phil.
  • FIG. 23 shows an embodiment in which the structure of FIG. 13 is applied to a three-stage filter.
  • a material with a relative dielectric constant of 9.6 a three-stage filter with a shape of 10.23 mm X 3.0 Omm 1.5 mm t was formed.
  • an input / output electrode component 36 with a height of 1.5 mn x 0.8 mm is set from the mounting surface side of the side surface.
  • Input / output electrodes 35 having a line width of 55 mm were formed.
  • an input / output electrode 35 having a depth of 0.8 mn ⁇ 0.6 mm was formed in an input / output electrode forming part 36 having a width of 1.4 mm and a depth of 3.0 mm.
  • the three-stage filter is mounted on a 1 Om mx 2 Ommx 0.4 mm teflon (registered trademark) substrate with signal lines and ground electrodes formed on the surface, and a 1.17 mm signal line and filter on the substrate are mounted.
  • the part on the mounting surface of the input / output electrode 35 was electrically short-circuited with solder.
  • FIG. 24 shows the characteristics of the dielectric filter manufactured as described above.
  • the center frequency was 2 1900 MHz, the 3 dB bandwidth was 360 MHz, and the peak point insertion loss was 2.08 dB.
  • the value obtained from this is 850, which is larger than the Qu value of the conventional filter.
  • the input / output electrodes are formed over two surfaces including the mounting surface, special metal fittings are used for the signal lines on the mounting substrate and the input / output electrodes of the dielectric filter. It can be connected with a conductive adhesive such as solder, so it has excellent mountability, there is no variation due to metal connection, and matching with the external circuit (VSWR) after mounting on the mounting board is achieved by using one side electrode. This can be easily performed by modifying the section.
  • the dielectric block exposed part is formed in the input / output electrode configuration part over such two surfaces, one end of the input / output electrode on the side surface of the dielectric block is short-circuited to the ground electrode.
  • the input / output coupling can be strengthened, the electromagnetic wave leakage can be reduced, and a low-loss dielectric filter can be obtained.
  • a filter having a wider bandwidth than an input / output electrode having a structure having no short-circuit point can be formed.
  • the input / output electrodes are formed from one side surface of the resonator at both ends of the dielectric filter to the mounting surface which is the lower surface, and Upper end of input / output electrode is connected to ground electrode
  • input / output coupling can be performed efficiently, so that the area of the exposed dielectric block can be reduced, and a low-loss filter with small electromagnetic wave leakage can be obtained.
  • the short-circuit point between the input / output electrode and the ground electrode below the upper end of the side surface of the dielectric, the area of the exposed portion of the dielectric block can be further reduced, and a low-loss filter can be obtained.
  • the number of steps for bonding the resonators to each other with solder or the like is reduced, which reduces the manufacturing cost and also occurs at the time of bonding. Potential bandwidth variations can be eliminated.

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  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un filtre diélectrique (1) à mode TE qui comprend un pluralité de résonateurs diélectriques (2) reliés en série, un système d'électrode d'entrée-sortie (6), une électrode de terre (8), et des joints. Le système d'électrode d'entrée-sortie (6) comprend une électrode d'entrée-sortie (5) et une partie d'exposition (4) de bloc diélectrique touchant cette électrode, et est formé sur le résonateur diélectrique aux niveau des extrémités opposées du filtre diélectrique (1). Un joint est formé sur la face de connexion des résonateurs diélectriques. L'électrode de terre (8) est formée sur la surface du résonateur diélectrique qui ne comprend pas l'ensemble électrode d'entrée-sortie (6) et le joint. L'électrode d'entrée-sortie (5) est formée de façon continue sur une face latérale qui ne comprend pas une face de montage (9) définie par la surface inférieure du résonateur diélectrique et la face de connexion. Seule l'extrémité supérieure de l'électrode d'entrée-sortie (5) sur une face latérale est court-circuitée avec l'électrode de terre (8).
PCT/JP2002/001530 2001-02-22 2002-02-21 Filtre dielectrique WO2002067358A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2001046034A JP2002246808A (ja) 2001-02-22 2001-02-22 誘電体フィルタ
JP2001-46034 2001-02-22
JP2002022785A JP3801058B2 (ja) 2002-01-31 2002-01-31 誘電体フィルタ
JP2002-22785 2002-01-31

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WO2002067358A1 true WO2002067358A1 (fr) 2002-08-29

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111384510A (zh) * 2018-12-31 2020-07-07 深圳市大富科技股份有限公司 介质滤波器及其制备方法、通信设备
EP3968451A1 (fr) * 2020-09-04 2022-03-16 Knowles Cazenovia, Inc. Guide d'ondes électromagnétiques montable sur substrat
WO2022132888A1 (fr) * 2020-12-17 2022-06-23 Cts Corporation Filtre diélectrique rf à structure d'entrée/sortie de signal rf montée en surface
US11929538B2 (en) 2020-12-17 2024-03-12 Cts Corporation RF dielectric filter with surface mount RF signal input/output structure

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Publication number Priority date Publication date Assignee Title
JPH03270501A (ja) * 1990-03-20 1991-12-02 Fujitsu Ltd 誘導体フィルタ
JPH09312505A (ja) * 1996-05-23 1997-12-02 Murata Mfg Co Ltd 誘電体フィルタ
JPH11195907A (ja) * 1997-12-27 1999-07-21 Toko Inc 誘電体フィルタ
JPH11195905A (ja) * 1997-12-26 1999-07-21 Toko Inc 誘電体フィルタ

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Publication number Priority date Publication date Assignee Title
JPH03270501A (ja) * 1990-03-20 1991-12-02 Fujitsu Ltd 誘導体フィルタ
JPH09312505A (ja) * 1996-05-23 1997-12-02 Murata Mfg Co Ltd 誘電体フィルタ
JPH11195905A (ja) * 1997-12-26 1999-07-21 Toko Inc 誘電体フィルタ
JPH11195907A (ja) * 1997-12-27 1999-07-21 Toko Inc 誘電体フィルタ

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TO'U SATOSHI ET AL.: "Chokketsugata yudentai ceramics BPF no sekkei to seisaku", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, GIJUTSU KENKYU HOKOKU, MW93-35, pages 45 - 52, XP002909458 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111384510A (zh) * 2018-12-31 2020-07-07 深圳市大富科技股份有限公司 介质滤波器及其制备方法、通信设备
EP3968451A1 (fr) * 2020-09-04 2022-03-16 Knowles Cazenovia, Inc. Guide d'ondes électromagnétiques montable sur substrat
WO2022132888A1 (fr) * 2020-12-17 2022-06-23 Cts Corporation Filtre diélectrique rf à structure d'entrée/sortie de signal rf montée en surface
US11929538B2 (en) 2020-12-17 2024-03-12 Cts Corporation RF dielectric filter with surface mount RF signal input/output structure

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