CN1145696A - Dielectric resonator, dielectric filter using the resonator, and prodn. method of the dielectric filter - Google Patents
Dielectric resonator, dielectric filter using the resonator, and prodn. method of the dielectric filter Download PDFInfo
- Publication number
- CN1145696A CN1145696A CN 96190071 CN96190071A CN1145696A CN 1145696 A CN1145696 A CN 1145696A CN 96190071 CN96190071 CN 96190071 CN 96190071 A CN96190071 A CN 96190071A CN 1145696 A CN1145696 A CN 1145696A
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- electrode
- face
- formed body
- grounding electrode
- hole
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- 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
- H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
- H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
-
- 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
- H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
- H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/04—Coaxial resonators
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
Abstract
The present invention provides a compact and high-performance dielectric resonator. In order to achieve the object, the invention including a molded body (1) made of a dielectric material, a through hole (2), first and second earth electrodes (3a, 3b), and an inner conductor (4). The molded body has an open end (5) and a terminated end (6) provided with the second earth electrode (3b). The through hole (2) has a larger diameter (15) at the open end (5), and an island-like electrode (8) is disposed on the side surface of the larger diameter (15) toward the open end (5).
Description
The dielectric filter that to the present invention relates to mainly be the dielectric resonator used such as high frequency radio equipment, constitute with its and the manufacture method of this dielectric filter.
Below existing dielectric resonator such as Fig. 8, shown in Figure 9, has the formed body 30 that dielectric substance is made, connect through hole 31 by the open end face 35 of this formed body 30 to end face 36, side at formed body 30 is covered first grounding electrode 32 that forms by conductor, cover the inner wire 34 that conductor forms at the inner peripheral surface of through hole 31, on the end face 36 of formed body 30, cover second grounding electrode 33 that conductor forms and that be connected with inner wire 34 with above-mentioned first grounding electrode 32.Open end face 35 1 sides in formed body 30 sides are provided with non-electrode formation portion 37, and are provided with island electrode 38 in this non-electrode formation portion 37.And, by as above constituting, constituted LC antiresonant circuit 40 as shown in figure 10.
In the above-mentioned formation, by the trap electric capacity 39 as shown in figure 10 that island electrode 38 and inner wire 34 constitute, its capacity is directly proportional with island electrode 38 sizes.Thereby, in order to constitute bigger trap electric capacity 39, need to strengthen island electrode 38, but trap electric capacity 39 is subjected to the restriction of dielectric resonator size, can't obtain the trap electric capacity 39 of the needed size of some occasion.Therefore and then high frequency waves characteristic problem fully inadequately arranged.
The object of the invention is to address this is that, and a kind of high-performance dielectric resonator is provided.
In order to reach this purpose, the present invention is provided with the through hole that is located on the dielectric resonator, open end face one side large-diameter portion and end face one side minor diameter, the part relative with the inner wire of described large-diameter portion is provided with the island electrode of isolating with first grounding electrode in the dielectric resonator side.
By such formation, dielectric resonator of the present invention just becomes to the inner wire relative with the island electrode is arranged on the large-diameter portion, thereby the distance of inner wire and island electrode is approaching, needn't strengthen the island electrode, just can guarantee bigger trap electric capacity.And then obtain the high-performance dielectric resonator thus.
Fig. 1 is the oblique view of first embodiment of the invention dielectric resonator.
Fig. 2 is the sectional view of this dielectric resonator.
Fig. 3 is the equivalent circuit diagram of this dielectric resonator.
Fig. 4 is the sectional view when on installation base plate this dielectric resonator being installed.
Fig. 5 is the oblique view of second embodiment of the invention dielectric filter.
Fig. 6 is the equivalent circuit diagram of this dielectric filter.
Fig. 7 is the detailed exploded perspective view that shows this dielectric filter.
Fig. 8 is the sectional view of existing dielectric resonator.
Fig. 9 is the sectional view of this dielectric resonator.
Figure 10 is the equivalent circuit diagram of this dielectric resonator.
(embodiment 1)
Among Fig. 1, Fig. 2, dielectric resonator comprises following composition: have 6 through holes 2 that connect from open end face 5 to end face, the formed body of being made by dielectric 1; Be located at the first grounding electrode 3a of this formed body 1 circumferential lateral surface; Be located at the inner wire 4 in the above-mentioned through hole 2; Be located at the end face 6 of above-mentioned formed body 1, and the second grounding electrode 3b that is connected with inner wire 4 with the above-mentioned first grounding electrode 3a.Above-mentioned through hole 2 has the large-diameter portion 15 of open end face 5 one sides and the minor diameter 16 of end face 6 one sides, be provided with non-electrode formation portion 7 in a certain side of above-mentioned formed body 1 and above-mentioned large-diameter portion 15 relative parts, and in this non-electrode formation portion 7, be provided with the island electrode 8 of isolating with the above-mentioned first grounding electrode 3a.
The dielectric resonator of Gou Chenging as shown in Figure 3 like this, be by making the first grounding electrode 3a ground connection, constitute LC antiresonant circuit 10, and island electrode 8 constitutes the trap electric capacity 11 by the dielectric formation with inner wire 4, and this trap electric capacity 11 is the devices that are connected in series with above-mentioned LC antiresonant circuit 10.
Above-mentioned through hole 2 is made of the large-diameter portion 15 of open end face 5 one sides and the minor diameter 16 of end face 6 one sides, and the impedance of dielectric resonator changes in through hole 2, thereby it is long to shorten dielectric resonator.In addition, the position relative with above-mentioned large-diameter portion 15 constitutes island electrode 8, thereby inner wire 4 is approaching with the distance of island electrode 8, thereby needn't strengthen island electrode 8, just can guarantee big trap electric capacity 11.
Comprise in the non-electrode formation portion 7 of island electrode 8 and utilize glassivation that electrode protective membrane 9 is set, and on above-mentioned island electrode 8, except that peripheral part, be provided with not formation portion 27 of electrode protective membrane.Electrode protective membrane 9 is set like this; can improve the intensity of connecting airtight of island electrode 8 relative formed bodys 1; and welding island electrode 8 time; because the end of this island electrode 8 is covered by electrode protective membrane 9; thereby there is not scolding tin to flow into; be not easy to cause stripping electrode etc., can provide reliability high dielectric resonator.
In addition; in island electrode 8 and non-electrode formation portion 7, establish electrode protective membrane 9 in the present embodiment; but this electrode protective membrane 9 is set to the words of the first grounding electrode 3a end that is positioned at island electrode 8 peripheries always; can also prevent that the first grounding electrode 3a tip electrodes from peeling off, and then can provide reliability higher dielectric resonator.
Fig. 4 is installed in the occasion that constitutes dielectric filter on the installation base plate 14 with Fig. 1-dielectric resonator shown in Figure 3.
This occasion; installation base plate 14 is provided with ground connection Copper Foil 12a and is connected Copper Foil 12b; connect the first grounding electrode 3a of ground connection Copper Foil 12a and dielectric resonator simultaneously with soft heat scolding tin 13, and the electrode protective membrane that connects Copper Foil 12b and island electrode 8 formation portion 27 not.
(embodiment 2)
Following with reference to the description of drawings second embodiment of the invention.
Among second embodiment, as shown in Figure 5, dielectric resonator 21a, 21b are installed on installation base plate 22, constitute band stop filter shown in Figure 6.
Above-mentioned installation base plate 22 is provided with and connects Copper Foil 23a, 23b and ground connection Copper Foil 25, and above-mentioned connection Copper Foil 23a, 23b are linked to each other by air core coil 24.And as shown in Figure 7, above-mentioned installation base plate 22 surfaces are provided with protective layer pattern 26, and this protective layer pattern 26 is provided with not formation portion 28,29 of protective layer with above-mentioned connection Copper Foil 23a, 23b and ground connection Copper Foil 25 corresponding parts.
The identical formation of dielectric resonator that illustrates among above-mentioned dielectric resonator 21a, 21b and first embodiment.
The occasion of dielectric resonator 21a, 21b is installed on installation base plate 22 as shown in Figure 7; the first grounding electrode 3a that makes dielectric resonator 21a, 21b with the soft heat scolder and the protective layer of installation base plate 22 not formation portion 29 are connected, and the electrode protective membrane that makes dielectric resonator 21a, 21b with the soft heat scolder not formation portion 27 and installation base plate 22 protective layer not formation portion 28 be connected.At this moment; by make above-mentioned electrode protective membrane not formation portion 27 formation portion 28 is not identical shaped with protective layer, when on installation base plate 22, dielectric resonator 21a, 21b being installed, even if utilize the soft heat assembling; also can prevent dielectric resonator 21a, 21b displacement, can assembled with high precision.
In sum, according to the present invention, be arranged on the large-diameter portion with island electrode inner wire in opposite directions, thereby the distance of inner wire and island electrode is approaching, needn't strengthen the island electrode, just can guarantee bigger trap electric capacity, and in the dielectric resonator through hole, the impedance of dielectric resonator changes in through hole 2, thereby it is long to shorten dielectric resonator, thereby the high-performance dielectric resonator can be provided.
Claims (7)
1. a dielectric resonator is characterized in that, comprises following composition: the formed body that has the through hole that connects from open end face to end face, made by dielectric; Be located at first grounding electrode of this formed body circumferential lateral surface; Be located at the inner wire in the described through hole; Be located at described formed body end face and connect second grounding electrode of described first grounding electrode and inner wire, described through hole has the large-diameter portion of open end face one side and the minor diameter of end face one side, the island electrode that part setting relative with described large-diameter portion and described first grounding electrode are isolated in a certain side of described formed body.
2. a dielectric resonator is characterized in that, comprises following composition: the formed body that has the through hole that connects from open end face to end face, made by dielectric; Be located at first grounding electrode of this formed body circumferential lateral surface; Be located at the inner wire in the described through hole; Be located at described formed body end face and connect second grounding electrode of described first grounding electrode and inner wire; described through hole has the large-diameter portion of open end face one side and the minor diameter of end face one side; the island electrode that part setting relative with described large-diameter portion and described first grounding electrode are isolated in a certain side of described formed body, the electrode protective membrane of being made by insulator covers this island electrode peripheral end.
3. a dielectric resonator is characterized in that, comprises following composition: the formed body that has the through hole that connects from open end face to end face, made by dielectric; Be located at first grounding electrode of this formed body circumferential lateral surface; Be located at the inner wire in the described through hole; Be located at described formed body end face and connect second grounding electrode of described first grounding electrode and inner wire; described through hole has the large-diameter portion of open end face one side and the minor diameter of end face one side; the island electrode that part setting relative with described large-diameter portion and described first grounding electrode are isolated in a certain side of described formed body, the electrode protective membrane of being made by insulator cover this island electrode peripheral end and are positioned at the first grounding electrode end of this island electrode outside.
4. dielectric filter, it is characterized in that, comprise installation base plate and be installed in dielectric resonator on this installation base plate, described dielectric resonator comprises following composition: the formed body that has the through hole that connects to end face from open end face, made by dielectric; Be located at first grounding electrode of this formed body circumferential lateral surface; Be located at the inner wire in the described through hole; Be located at described formed body end face; and connect second grounding electrode of described first grounding electrode and inner wire; described through hole has the large-diameter portion of open end face one side and the minor diameter of end face one side; the island electrode that part setting relative with described large-diameter portion and described first grounding electrode are isolated in a certain side of described formed body; described installation base plate has the connection Copper Foil from the teeth outwards; ground connection Copper Foil and cover the described electrode protective membrane that is connected Copper Foil, on the described connection Copper Foil with the electrode protective membrane of corresponding part setting of described dielectric resonator island electrode and the roughly the same shape of island electrode exposed division formation portion not.
5. dielectric filter as claimed in claim 4 is characterized in that, the electrode protective membrane of being made by insulator covers the peripheral end of being located at the island electrode on the dielectric resonator.
6. dielectric filter as claimed in claim 5 is characterized in that, the electrode protective membrane of being made by insulator covers the end of first grounding electrode that is positioned at island electrode outside set on the dielectric resonator.
7. dielectric filter manufacture method, it is characterized in that, described dielectric filter comprises installation base plate and is installed in dielectric resonator on this installation base plate that described dielectric resonator comprises following composition: the formed body that has the through hole that connects to end face from open end face, made by dielectric; Be located at first grounding electrode of this formed body circumferential lateral surface; Be located at the inner wire in the described through hole; Be located at described formed body end face; and connect second grounding electrode of described first grounding electrode and inner wire; described through hole has the large-diameter portion of open end face one side and the minor diameter of end face one side; the island electrode that part setting relative with described large-diameter portion and described first grounding electrode are isolated in a certain side of described formed body; described installation base plate has the connection Copper Foil from the teeth outwards; ground connection Copper Foil and the described electrode protective membrane that is connected Copper Foil of covering; on the described connection Copper Foil with the electrode protective membrane of corresponding part setting of described dielectric resonator island electrode and the roughly the same shape of island electrode exposed division formation portion not; utilize the soft heat scolder to carry out first grounding electrode of described dielectric resonator and being connected of described installation base plate ground connection Copper Foil simultaneously, be connected the not connection of formation portion of electrode protective membrane of Copper Foil with described installation base plate with the exposed division of described dielectric resonator island electrode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16850/95 | 1995-02-03 | ||
| JP1685095A JPH08213810A (en) | 1995-02-03 | 1995-02-03 | Dielectric resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1145696A true CN1145696A (en) | 1997-03-19 |
Family
ID=11927696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96190071 Pending CN1145696A (en) | 1995-02-03 | 1996-02-02 | Dielectric resonator, dielectric filter using the resonator, and prodn. method of the dielectric filter |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0756350A4 (en) |
| JP (1) | JPH08213810A (en) |
| CN (1) | CN1145696A (en) |
| WO (1) | WO1996024171A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305751C (en) * | 2003-05-13 | 2007-03-21 | 索尼株式会社 | Micromachine and method of fabricating the same |
| CN1331727C (en) * | 2003-06-10 | 2007-08-15 | 索尼株式会社 | Micromachine production method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2836536B2 (en) * | 1995-08-25 | 1998-12-14 | 松下電器産業株式会社 | Dielectric filter and package mounting the same |
| WO2018012294A1 (en) * | 2016-07-13 | 2018-01-18 | 株式会社村田製作所 | Waveguide filter circuit, mounting substrate for waveguide filters and waveguide filter |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5916403A (en) * | 1982-07-19 | 1984-01-27 | Matsushita Electric Ind Co Ltd | Oscillating circuit |
| JPS63187901A (en) * | 1987-01-30 | 1988-08-03 | Murata Mfg Co Ltd | Dielectric filter |
| JPH01227501A (en) * | 1988-03-07 | 1989-09-11 | Matsushita Electric Ind Co Ltd | Dielectric coaxial resonator |
| JPH0220102A (en) * | 1988-07-07 | 1990-01-23 | Matsushita Electric Ind Co Ltd | Coaxial type dielectric resonator |
| JPH02130103U (en) * | 1988-11-16 | 1990-10-26 | ||
| JPH04103202A (en) * | 1990-08-22 | 1992-04-06 | Murata Mfg Co Ltd | Dielectric filter |
| JP2811382B2 (en) * | 1991-12-11 | 1998-10-15 | 富士電気化学株式会社 | Dielectric filter |
| JP3344428B2 (en) * | 1992-07-24 | 2002-11-11 | 株式会社村田製作所 | Dielectric resonator and dielectric resonator component |
| JP2780591B2 (en) * | 1993-03-12 | 1998-07-30 | 松下電器産業株式会社 | Dielectric filter |
| JPH06310911A (en) * | 1993-04-27 | 1994-11-04 | Murata Mfg Co Ltd | Dielectric resonator component |
| JP3211547B2 (en) * | 1994-01-25 | 2001-09-25 | 株式会社村田製作所 | Dielectric filter |
-
1995
- 1995-02-03 JP JP1685095A patent/JPH08213810A/en active Pending
-
1996
- 1996-02-02 WO PCT/JP1996/000223 patent/WO1996024171A1/en not_active Application Discontinuation
- 1996-02-02 CN CN 96190071 patent/CN1145696A/en active Pending
- 1996-02-02 EP EP96901530A patent/EP0756350A4/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305751C (en) * | 2003-05-13 | 2007-03-21 | 索尼株式会社 | Micromachine and method of fabricating the same |
| CN1331727C (en) * | 2003-06-10 | 2007-08-15 | 索尼株式会社 | Micromachine production method |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0756350A4 (en) | 1998-04-15 |
| EP0756350A1 (en) | 1997-01-29 |
| WO1996024171A1 (en) | 1996-08-08 |
| JPH08213810A (en) | 1996-08-20 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |