CN104320103A - Filter with high out-of-band rejection - Google Patents
Filter with high out-of-band rejection Download PDFInfo
- Publication number
- CN104320103A CN104320103A CN201410471354.4A CN201410471354A CN104320103A CN 104320103 A CN104320103 A CN 104320103A CN 201410471354 A CN201410471354 A CN 201410471354A CN 104320103 A CN104320103 A CN 104320103A
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- China
- Prior art keywords
- filter
- hole
- circuit
- depressed area
- face
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052709 silver Inorganic materials 0.000 claims abstract description 11
- 239000004332 silver Substances 0.000 claims abstract description 11
- 230000000994 depressogenic effect Effects 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000007639 printing Methods 0.000 abstract description 4
- 239000000919 ceramic Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to a filter with high out-of-band rejection. The filter is characterized by comprising a top surface and a bottom surface, two through holes are formed between the top surface and the bottom surface, and a sunken area is formed at openings of two through holes on the bottom surface. The high rejection of the filter can be realized without adding hole number and product volume, and the design of a circuit face is simplified, the printing of the whole circuit is disposed, and two through holes are directly coupled to form a pass-band; the aims of saving cost and simplifying process are achieved when the silver layer coating is avoided.
Description
Technical field
The present invention relates to a kind of filter, particularly relate to a kind of diplopore Ceramic Dielectric Filter.
Background technology
The design of the holes Ceramic Dielectric Filter above existing market is substantially all: on a ceramic block, offer two through holes, the another side paralleled with it is extended through from the one side of ceramic block, at an end face printing filter circuit of holes, adjacent with circuit while be printed on input and output electrode, form electrode surface, described electrode surface is parallel with the arrangement aspect in hole, except electrode and circuit face peripheral surface, other face and described holes hole inwall are all with silver coating, whole ceramic block six face is all plane, and (specifically reference as shown in Figure 1, wherein, a () figure is the front view of the holes Ceramic Dielectric Filter of prior art, b () figure is the structural representation of filter reverse side.), the hole count of ceramic block directly determines flexibility and the complexity of its circuit design, the requirement regarding to dielectric filter in the market is just trending towards the miniaturization of electrical specifications severization volume, but the design of holes filter is often difficult to accomplish this point at present, the Out-of-band rejection particularly for the flash of filter passband is not generally fine.
Therefore, how to design a kind of filter, make it have at the flash of passband the technical barrier that good Out-of-band rejection performance is this area.
Summary of the invention
The object of this invention is to provide a kind of filter of high out-of-side rejection, this filter solves the low technical problem of traditional holes Ceramic Dielectric Filter Out-of-band rejection performance.
In order to solve the problems of the technologies described above, the invention provides a kind of filter of high out-of-side rejection, comprising: end face and bottom surface, and offer two through hole between described end face and bottom surface, and the two through hole mouth place being positioned at bottom surface is provided with depressed area.
Further, described depressed area is located at the edge, surrounding of two through hole mouth respectively, to form corresponding shoulder hole.
Further, described depressed area is the groove offered between two through hole mouth.
Further, described depressed area all applies silver layer.
Further, in order to simplify the design of circuit face, remove the printing of whole circuit, namely between two through hole, direct-coupling forms passband; The circuit face uncoated of the filter circuit of described filter has silver layer, and filter circuit is opened a way.
Technique scheme of the present invention has the following advantages compared to existing technology: (1) can realize filter height and suppress on the basis not increasing hole count and small product size; (2) simplify the design of circuit face, remove the printing of whole circuit, direct-coupling between two through hole is formed passband, and exempt from coating silver layer and reached and provide cost savings, the object of the technique of simplification.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below basis specific embodiment and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of prior art median filter;
Fig. 2 is the bottom surface structure schematic diagram of the first execution mode of filter;
Fig. 3 is the profile of the filter of the first execution mode of filter;
Fig. 4 is the bottom surface structure schematic diagram of the second execution mode of filter;
Fig. 5 is the profile of the filter of the second execution mode of filter;
Fig. 6 is the passband that the filter not being provided with depressed area is formed;
Fig. 7 is the passband that the filter of described high out-of-side rejection is formed.
Wherein, end face 1, bottom surface 2, silver layer 101, through hole 102, depressed area 201, groove 202.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment also with reference to accompanying drawing, the present invention is described in more detail.Should be appreciated that, these describe just exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present invention.
Fig. 2 shows the bottom surface structure schematic diagram of the first execution mode of filter.
Fig. 3 shows the profile of the filter of the first execution mode of filter.
Fig. 4 shows the bottom surface structure schematic diagram of the second execution mode of filter.
Fig. 5 shows the profile of the filter of the second execution mode of filter.
As shown in Figures 2 to 5, a kind of filter of high out-of-side rejection, comprising: end face 1 and bottom surface 2, and offers two through hole 102 between described end face 1 and bottom surface 2, and the two through hole 102 mouthfuls of places being positioned at bottom surface 2 are provided with depressed area 201.
Described depressed area adopts the following two kinds structure.
As shown in Figures 2 and 3, optionally, described depressed area 201 is located at the edge, surrounding of two through hole 102 mouthfuls respectively, to form corresponding shoulder hole.
As shown in Figure 4 and Figure 5, optionally, described depressed area 201 is the groove 202 offered between two through hole 102 mouthfuls.
Further, described depressed area 201 all applies silver layer.
Further, the circuit face uncoated being arranged in the filter circuit of through hole 102 has silver layer, makes filter circuit be in open-circuit condition, and now, between two through hole 102, direct-coupling forms passband, and exempts from coating silver layer and reached and provide cost savings, the object of the technique of simplification.
Fig. 6 shows the passband that the filter that is not provided with depressed area is formed.
The passband that the filter that Fig. 7 shows described high out-of-side rejection is formed.
Compare from Fig. 6 and Fig. 7, can only about 20DB be reached when showing 910MHZ in Fig. 4, and when Fig. 5 is presented at 910MHZ, create a trap wave point, namely reach 27.311DB, make the better of rejection ratio routine.
Should be understood that, above-mentioned embodiment of the present invention only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore, any amendment made when without departing from the spirit and scope of the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention be intended to contain fall into claims scope and border or this scope and border equivalents in whole change and modification.
Claims (5)
1. a filter for high out-of-side rejection, is characterized in that, comprising: end face and bottom surface, and offers two through hole between described end face and bottom surface, and the two through hole mouth place being positioned at bottom surface is provided with depressed area.
2. filter according to claim 1, is characterized in that, described depressed area is located at the edge, surrounding of two through hole mouth respectively, to form corresponding shoulder hole.
3. filter according to claim 1, is characterized in that, described depressed area is the groove offered between two through hole mouth.
4., according to the arbitrary described filter of claim 1-3, it is characterized in that, described depressed area all applies silver layer.
5. filter according to claim 4, is characterized in that, the circuit face uncoated of the filter circuit of described filter has silver layer, and filter circuit is opened a way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410471354.4A CN104320103A (en) | 2014-09-16 | 2014-09-16 | Filter with high out-of-band rejection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410471354.4A CN104320103A (en) | 2014-09-16 | 2014-09-16 | Filter with high out-of-band rejection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104320103A true CN104320103A (en) | 2015-01-28 |
Family
ID=52375300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410471354.4A Pending CN104320103A (en) | 2014-09-16 | 2014-09-16 | Filter with high out-of-band rejection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104320103A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870550A (en) * | 2016-04-22 | 2016-08-17 | 厦门松元电子有限公司 | Low-insertion loss split filter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05226909A (en) * | 1992-02-12 | 1993-09-03 | Sony Chem Corp | Dielectric filter |
| US5764118A (en) * | 1993-07-23 | 1998-06-09 | Sony Chemicals Corporation | Dielectric coaxial filter with irregular polygon shaped recesses |
| CN1201271A (en) * | 1997-03-31 | 1998-12-09 | 株式会社村田制作所 | Medium filter, medium duplexer and communication equipment using same |
| CN1236197A (en) * | 1998-04-17 | 1999-11-24 | 株式会社村田制作所 | Dielectric filter, dielectric duplexer, mounting structure thereof, and communication device |
| JP2000165106A (en) * | 1998-11-25 | 2000-06-16 | Murata Mfg Co Ltd | Dielectric filter, duplexer and communication equipment |
| CN204168260U (en) * | 2014-09-16 | 2015-02-18 | 张家港保税区灿勤科技有限公司 | A kind of filter of high out-of-side rejection |
-
2014
- 2014-09-16 CN CN201410471354.4A patent/CN104320103A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05226909A (en) * | 1992-02-12 | 1993-09-03 | Sony Chem Corp | Dielectric filter |
| US5764118A (en) * | 1993-07-23 | 1998-06-09 | Sony Chemicals Corporation | Dielectric coaxial filter with irregular polygon shaped recesses |
| CN1201271A (en) * | 1997-03-31 | 1998-12-09 | 株式会社村田制作所 | Medium filter, medium duplexer and communication equipment using same |
| CN1236197A (en) * | 1998-04-17 | 1999-11-24 | 株式会社村田制作所 | Dielectric filter, dielectric duplexer, mounting structure thereof, and communication device |
| JP2000165106A (en) * | 1998-11-25 | 2000-06-16 | Murata Mfg Co Ltd | Dielectric filter, duplexer and communication equipment |
| CN204168260U (en) * | 2014-09-16 | 2015-02-18 | 张家港保税区灿勤科技有限公司 | A kind of filter of high out-of-side rejection |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870550A (en) * | 2016-04-22 | 2016-08-17 | 厦门松元电子有限公司 | Low-insertion loss split filter |
| CN105870550B (en) * | 2016-04-22 | 2019-02-22 | 厦门松元电子有限公司 | A kind of split type filter of filter with low insertion loss |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |
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| WD01 | Invention patent application deemed withdrawn after publication |