CN101908666A - Dielectric filter for improving secondary harmonic waves - Google Patents
Dielectric filter for improving secondary harmonic waves Download PDFInfo
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- CN101908666A CN101908666A CN2010102371559A CN201010237155A CN101908666A CN 101908666 A CN101908666 A CN 101908666A CN 2010102371559 A CN2010102371559 A CN 2010102371559A CN 201010237155 A CN201010237155 A CN 201010237155A CN 101908666 A CN101908666 A CN 101908666A
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Abstract
The invention relates to a dielectric filter for improving secondary harmonic waves. The dielectric filter is provided with a dielectric block which is made from a ceramic material and provided with an upper surface as an opening surface and an electrode surface provided with a signal input attenuator and a signal output attenuator, wherein a row of through holes are arranged between the upper surface and the lower surface of the dielectric block, the axes of the through holes are mutually parallel side by side, a partial conductive layer is respectively coated on the periphery of each through hole on the upper surface, a non-coating area is formed around each partial conductive layer, a non-coating area is arranged on the periphery of partial through holes on the lower surface, a conductive layer is formed around the non-coating area, and a conductive layer is arranged on the periphery of the rest through holes on the lower surface. The invention has relatively favorable restraint to a frequency band far from a passband and particularly has favorable restraint to a double frequency band.
Description
Technical field
The present invention relates to a kind of dielectric filter, be specifically related to the dielectric filter on a kind of communicator that is equipped in mobile communication apparatus etc.
Background technology
The dielectric filter of prior art as Figure 1-3.This dielectric filter is the medium block of being made by dielectric material.This medium block has upper surface, lower surface, electrode surface, ground plane and resonance hole.The medium block surface has electric conducting material to form outer conductor.Medium block comprises coaxial resonance hole, at least two λ/4.The resonance hole extends to lower surface from upper surface, and inwall forms inner wire by electric conducting material.The regional coated with conductive material that upper surface links to each other with ground plane, electrode surface, and upper surface makes each resonance hole inner wire not be connected with the medium block outer conductor around the no electric conducting material of resonance bore region.Lower surface makes resonance hole inner wire be connected with outer conductor by electric conducting material.Electrode surface is by two input/output ports of drawing from upper surface.Other three faces are ground plane.
Dielectric filter can form a passband allows the signal of frequency range that need to use pass through.The signal of the frequency range that do not need to use formed suppress, to allow its nonpassage of signal mistake.The traditional sucrose filter has inhibition preferably in the nearer frequency of distance passband.But all can form second harmonic, so that suppress very poor, even form second passband and pass through by unwanted signal at centre frequency doubled frequency place.Shown in Figure 3 is the performance diagram of traditional sucrose filter second harmonic, relatively poor than the frequency range inhibition effect of far-end at the distance passband.
Summary of the invention
The object of the invention provides a kind of dielectric filter that improves second harmonic, and this dielectric filter passband of adjusting the distance also has relatively preferably than the frequency range of far-end and suppresses, and is better to the inhibition of passband twice frequency range especially.
For achieving the above object, the technical solution used in the present invention is:
A kind of dielectric filter that improves second harmonic, have a medium block that is made of ceramic material, this medium block has the trailing flank of the upper surface as open surface, the electrode surface that is provided with signal input attenuator and signal output pad, coated conductive layer, the left surface of coated conductive layer, the right flank of coated conductive layer; Be provided with row's through hole between the upper surface of this medium block and the lower surface, the axis of described through hole is parallel to each other, arranged side by side, and each through hole coated inner wall inner conducting layer constitutes row's resonance hole with this;
Periphery around each through hole on the described upper surface is coated with a local conductive layer respectively, is no coating area around the every local conductive layer, and these no coating areas connect mutually;
Periphery around the part through hole on the described lower surface is no coating area, is conductive layer around this no coating area, is conductive layer around all the other through holes on the described lower surface.
Related content in the technique scheme is explained as follows:
In the such scheme, the left side of described upper surface, right side and posterior edges place are provided with peripheral conductive layer, and this periphery conductive layer is connected with conductive layer on being coated on left surface, right flank and trailing flank.
In the such scheme, the no coating area that centers on the periphery of part through hole on the described lower surface is an annular.
Because the technique scheme utilization the invention has the beneficial effects as follows:
The present invention's passband of can adjusting the distance forms relatively preferably than the frequency range of far-end and suppresses.Better to the inhibition of passband twice frequency range especially.The traditional sucrose filter has inhibition preferably in the nearer frequency of distance passband.But all can form second harmonic, so that suppress very poor, even form second passband and pass through by unwanted signal at centre frequency doubled frequency place.
Description of drawings
Accompanying drawing 1 is a traditional sucrose filter perspective view;
Accompanying drawing 2 is a traditional sucrose filter lower surface vertical view;
Accompanying drawing 4 is dielectric duplexer perspective view of the present invention;
Accompanying drawing 5 is dielectric filter lower surface vertical view of the present invention;
Accompanying drawing 6 is dielectric filter characteristic curve of the present invention.
In the above accompanying drawing: 1, medium block, 2, upper surface, 3, the signal input attenuator, 4, signal output pad, 5, electrode surface, 6, trailing flank, 7, left surface, 8, right flank, 9, lower surface, 10, through hole, 11, local conductive layer, 12, no coating area, 13, conductive layer, 14, peripheral conductive layer.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment: a kind of dielectric filter that improves second harmonic,
Have a medium block 1 that is made of ceramic material, this medium block 1 has the trailing flank 6 of the upper surface 2 as open surface, the electrode surface 5 that is provided with signal input attenuator 3 and signal output pad 4, coated conductive layer, the left surface 7 of coated conductive layer, the right flank 8 of coated conductive layer; Be provided with row's through hole 10 between the upper surface 2 of this medium block 1 and the lower surface 9, the axis of described through hole 10 is parallel to each other, arranged side by side, and each through hole 10 coated inner wall inner conducting layer constitutes row's resonance hole 10 with this;
Periphery around each through hole 10 on the described upper surface 2 is coated with a local conductive layer 11 respectively, is no coating area 12 around the every local conductive layer 11, and these no coating areas 12 connect mutually;
Periphery around the part through hole on the described lower surface 9 is no coating area 12, is conductive layer 13 around this no coating area 12, is conductive layer 13 around all the other through holes on the described lower surface 9.
The left side of described upper surface 2, right side and posterior edges place are provided with peripheral conductive layer 14, and this periphery conductive layer 14 is connected with conductive layer 13 on being coated on left surface, right flank and trailing flank.
The no coating area 12 that centers on the periphery of part through hole on the described lower surface 9 is an annular.
λ/4 resonance holes, computing formula is as follows in the medium:
λ=c/f draws: fo=c/ λ,
L=λ/4 draw: λ=4*L,
Finally draw
So:
Coaxial resonance hole, λ/4
Coaxial resonance hole, λ/2.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (3)
1. dielectric filter that improves second harmonic, have a medium block that is made of ceramic material (1), this medium block (1) has the trailing flank (6) of the upper surface (2) as open surface, the electrode surface (5) that is provided with signal input attenuator (3) and signal output pad (4), coated conductive layer, the left surface (7) of coated conductive layer, the right flank (8) of coated conductive layer; Be provided with row's through hole (10) between upper surface (2) of this medium block (1) and the lower surface (9), the axis of described through hole (10) is parallel to each other, arranged side by side, and each through hole (10) coated inner wall inner conducting layer constitutes a row resonance hole (10) with this; It is characterized in that:
Described upper surface (2) is gone up around the periphery of each through hole (10) and is coated with a local conductive layer (11) respectively, and every local conductive layer (11) is no coating area (12) all around, and these no coating areas (12) connect mutually;
It is no coating area (12) that described lower surface (9) is gone up around the periphery of part through hole, and this no coating area (12) is conductive layer (13) all around, and it is conductive layer (13) that described lower surface (9) is gone up around all the other through holes.
2. dielectric filter according to claim 1 is characterized in that: it is annular that described lower surface (9) is gone up around the no coating area (12) of the periphery of part through hole.
3. dielectric filter according to claim 1, it is characterized in that: the left side of described upper surface (2), right side and posterior edges place are provided with peripheral conductive layer (14), and this periphery conductive layer (14) is connected with conductive layer (13) on being coated on left surface, right flank and trailing flank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102371559A CN101908666A (en) | 2010-07-27 | 2010-07-27 | Dielectric filter for improving secondary harmonic waves |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102371559A CN101908666A (en) | 2010-07-27 | 2010-07-27 | Dielectric filter for improving secondary harmonic waves |
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| CN101908666A true CN101908666A (en) | 2010-12-08 |
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| CN2010102371559A Pending CN101908666A (en) | 2010-07-27 | 2010-07-27 | Dielectric filter for improving secondary harmonic waves |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742766A (en) * | 2016-03-04 | 2016-07-06 | 嘉兴佳利电子有限公司 | Combined filter employing ceramic resonator grooving and coupling mode |
| CN107690727A (en) * | 2015-06-17 | 2018-02-13 | Cts公司 | Multi-band rf monoblock filter |
| CN107959094A (en) * | 2016-10-17 | 2018-04-24 | 太盟光电科技股份有限公司 | The improved wave filter of structure |
| CN109461995A (en) * | 2018-12-27 | 2019-03-12 | 苏州艾福电子通讯有限公司 | A kind of waveguide filter using ceramic dielectric |
| CN110120571A (en) * | 2019-06-05 | 2019-08-13 | 江苏灿勤科技股份有限公司 | The dielectric filter of harmonics restraint can be optimized |
| WO2020087378A1 (en) * | 2018-10-31 | 2020-05-07 | 华为技术有限公司 | Dielectric filter and communication device |
| WO2020132973A1 (en) * | 2018-12-26 | 2020-07-02 | 华为技术有限公司 | Dielectric filter, duplexer, and communication device |
| WO2020143070A1 (en) * | 2019-01-11 | 2020-07-16 | 苏州艾福电子通讯有限公司 | Filter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237005A (en) * | 1998-05-21 | 1999-12-01 | 株式会社村田制作所 | Medium filter, medium antenna diplexer and communicator apparatus |
| WO2001011711A1 (en) * | 1999-08-06 | 2001-02-15 | Ube Electronics, Ltd. | Dielectric filter with a transmission line |
| CN1469505A (en) * | 2002-06-12 | 2004-01-21 | 三洋电机株式会社 | Dielectric duplexer |
| CN101714683A (en) * | 2009-11-26 | 2010-05-26 | 苏州艾福电子通讯有限公司 | Dielectric filter with trap graphs and duplexer |
-
2010
- 2010-07-27 CN CN2010102371559A patent/CN101908666A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237005A (en) * | 1998-05-21 | 1999-12-01 | 株式会社村田制作所 | Medium filter, medium antenna diplexer and communicator apparatus |
| WO2001011711A1 (en) * | 1999-08-06 | 2001-02-15 | Ube Electronics, Ltd. | Dielectric filter with a transmission line |
| CN1469505A (en) * | 2002-06-12 | 2004-01-21 | 三洋电机株式会社 | Dielectric duplexer |
| CN101714683A (en) * | 2009-11-26 | 2010-05-26 | 苏州艾福电子通讯有限公司 | Dielectric filter with trap graphs and duplexer |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107690727A (en) * | 2015-06-17 | 2018-02-13 | Cts公司 | Multi-band rf monoblock filter |
| CN107690727B (en) * | 2015-06-17 | 2020-03-17 | Cts公司 | Multiband RF monoblock filter |
| CN105742766A (en) * | 2016-03-04 | 2016-07-06 | 嘉兴佳利电子有限公司 | Combined filter employing ceramic resonator grooving and coupling mode |
| CN107959094A (en) * | 2016-10-17 | 2018-04-24 | 太盟光电科技股份有限公司 | The improved wave filter of structure |
| CN107959094B (en) * | 2016-10-17 | 2020-10-30 | 太盟光电科技股份有限公司 | Filter with improved structure |
| WO2020087378A1 (en) * | 2018-10-31 | 2020-05-07 | 华为技术有限公司 | Dielectric filter and communication device |
| US11509030B2 (en) | 2018-10-31 | 2022-11-22 | Huawei Technologies Co., Ltd. | Dielectric filter and communications device |
| WO2020132973A1 (en) * | 2018-12-26 | 2020-07-02 | 华为技术有限公司 | Dielectric filter, duplexer, and communication device |
| US11909086B2 (en) | 2018-12-26 | 2024-02-20 | Huawei Technologies Co., Ltd. | Dielectric filter, duplexer, and communications device |
| CN109461995A (en) * | 2018-12-27 | 2019-03-12 | 苏州艾福电子通讯有限公司 | A kind of waveguide filter using ceramic dielectric |
| WO2020143070A1 (en) * | 2019-01-11 | 2020-07-16 | 苏州艾福电子通讯有限公司 | Filter |
| CN110120571A (en) * | 2019-06-05 | 2019-08-13 | 江苏灿勤科技股份有限公司 | The dielectric filter of harmonics restraint can be optimized |
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Application publication date: 20101208 |