CN101800348A - TM membrane dielectric resonator - Google Patents
TM membrane dielectric resonator Download PDFInfo
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- CN101800348A CN101800348A CN 201010147482 CN201010147482A CN101800348A CN 101800348 A CN101800348 A CN 101800348A CN 201010147482 CN201010147482 CN 201010147482 CN 201010147482 A CN201010147482 A CN 201010147482A CN 101800348 A CN101800348 A CN 101800348A
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- dielectric resonator
- mould
- titanium dioxide
- calcium carbonate
- resonator
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Abstract
The invention relates to a TM membrane dielectric resonator which is a cylindrical ring structure dielectric resonator with a through hole, wherein one end of a cylindrical ring is coated with a metal layer or two ends of the cylindrical ring are coated with metal layers, and the cylindrical ring is made of microwave medium ceramics materials which comprise calcium carbonate, alumina, neodymium oxide, titanium dioxide, rare-earth element samarium Sm and rare-earth element yttrium Y. The invention provides the dielectric resonator with high quality factor and low frequency temperature coefficient, and solves the technical problems of large volume, low Q value and high temperature coefficient of the dielectric resonator in the prior art.
Description
Technical field
The present invention relates to a kind of microwave dielectric resonator, belong to reciprocity microwave device field.
Background technology
Following 4G development is leading the upsurge in construction of a telecommunications industry new round.Wherein, radio communication base station is subjected to the extensive concern of industry as the important part of radio communication.For China, since the develop rapidly of modern communications industry, the announcement of China's 3G standard, the deployment of new round wireless communication infrastructure is fully under way, wherein, base station deployment will be one of important problem, and present GSM and cdma base station are about to face comprehensive upgrading.Realize high-quality mobile communication, it is very crucial that the control interference signal enters communication channel.On the one hand, control the influence of the outer interference of communication channel to communication channel, for example, thunder and lightning disturbs and the influence of other communication system (as the gsm communication signal to the influence of CDMA etc.).On the other hand, the phase mutual interference of controlling between the same communication system channel is also very crucial.For this reason, the radio frequency part in the mobile communication base station needs to realize above-mentioned functions with filter and duplexer.The filter and the duplexer of base station radio-frequency part mostly adopt silver-plated metal coaxial cavity with resonator at present, because the quality factor of this coaxial cavity are Q value limited (Qu is about 3500), and, owing to adopted the wire chamber of intrinsic big thermal coefficient of expansion, thereby cause the resonance frequency temperature stability of resonator very poor, in order to make its frequency not produce bigger drift with the variation of ambient temperature, whole base station must be operated in isoperibol, cause the base station bulky, energy consumption is high, the requirement of incompatibility low-carbon economy.Therefore, how to develop a kind ofly have high quality factor, frequency-temperature coefficient is low and the dielectric resonator of low Insertion Loss becomes the direction that those skilled in the art make great efforts.
Summary of the invention
The object of the invention provides a kind of have high quality factor, dielectric resonator that frequency-temperature coefficient is low, solves the technical problem of the low and frequency stability of temperature difference of resonator quality factor in the prior art.
For achieving the above object, the technical solution used in the present invention is:
A kind of TM mould dielectric resonator, this dielectric resonator is the cylinder ring structured media resonator with through hole, one end of this cylinder ring is coated with metal level or two ends are coated with metal level, described cylinder ring adopts microwave dielectric ceramic materials, and the prescription of this microwave dielectric ceramic materials is made up of the material of following quality percentage composition:
Calcium carbonate 25～35%;
Aluminium oxide 6～12%;
Neodymia 15～25%;
Titanium dioxide 30～40%;
Samarium oxide 1～5%;
Yittrium oxide 1～5%.
Related content in the technique scheme is explained as follows:
1, in the such scheme, described calcium carbonate, aluminium oxide, neodymia, titanium dioxide quality percentage composition are specially:
Calcium carbonate 30%;
Aluminium oxide 10%;
Neodymia 20%;
Titanium dioxide 35%.
2, in the such scheme, described metal level is a silver layer.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
The present invention is owing to adopt the TM mould, thereby the field is more concentrated in dielectric resonator, thereby the Q value is more much higher than metal resonators, make with the TM mould to be that the filter loss of main mould is low, frequency characteristic is more precipitous, particularly be applied to the oscillator of TM mould, have very wide tuning range, good temp characteristic, volume is little, reliability is high.Secondly, it is 45 that the present invention adopts dielectric constant, Q
fTM mould dielectric resonator for the ceramic material of 45000GHZ is made by adding a small amount of rare earth element, reduces frequency-temperature coefficient in material prescription greatly, has changed the single nonadjustable state of development of temperature coefficient.Once more, in prescription,, the consistency of temperature coefficient of resonance frequency also is greatly improved by rare earth element samarium Sm, the compound interpolation of yttrium Y.In prescription, pass through samarium oxide Sm
2O
3, yittrium oxide Y
2O
3Compound interpolation, by part Sm
3+, Y
3+Replace Nd
3+, Sm
3+Ionic radius (0.096nm) and Y
3+Ionic radius (0.089nm) is less than Nd
3+Ionic radius (0.127nm), easier filling also occupies Nd
3+The crystal boundary enrichment is reduced in space around the ion, makes composition more even, improves CaCO
3-Al
2O
3-Nd
2O
3-TiO
2The density of pottery causes the Q value to rise, and has reduced frequency-temperature coefficient.
Description of drawings
Accompanying drawing 1 is a cylindrical hole structure TM dielectric resonator schematic diagram;
Accompanying drawing 2 is the field distribution schematic diagram of TM mould;
Accompanying drawing 3A is the 3D distribution map of the electric field in the Ansoft three-dimensional finite element simulation software;
Accompanying drawing 3B is the 3D Distribution of Magnetic Field figure in the Ansoft three-dimensional finite element simulation software.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment: a kind of TM mould dielectric resonator
In 4G (TD-LTE) mobile communication base station, volume and weight to the base station has very strict control, for this reason, must reduce the volume and weight of filter, but can not reduce the performance of filter, in order to obtain higher Q value, better pattern, wideer tuning range and better temperature stability, adopted with TM be main mould cylinder annular through-hole structure dielectric resonator as shown in Figure 1.
This dielectric resonator is the cylinder ring structured media resonator with through hole, and an end of this cylinder ring is coated with metal level or two ends are coated with metal level, adopts that dielectric constant is 45, Q
fThe TM mould dielectric resonator of making for the ceramic material of 45000GHZ.In material prescription,, frequency-temperature coefficient is reduced greatly, thereby changed the single nonadjustable state of development of temperature coefficient by adding a small amount of rare earth element, specific as follows:
The described cylinder ring that constitutes dielectric filter adopts microwave dielectric ceramic materials, and the prescription of this microwave dielectric ceramic materials is made up of the material of following quality percentage composition:
Calcium carbonate 25～35%;
Aluminium oxide 6～12%;
Neodymia 15～25%;
Titanium dioxide 30～40%;
Samarium oxide 1～5%;
Yittrium oxide 1～5%.
Wherein, described calcium carbonate, aluminium oxide, neodymia, titanium dioxide quality percentage composition adopt following mass percent optimum:
Calcium carbonate 30%;
Aluminium oxide 10%;
Neodymia 20%;
Titanium dioxide 35%.
Above-mentioned raw materials by rare earth element samarium Sm, the compound interpolation of yttrium Y, also is greatly improved the consistency of temperature coefficient of resonance frequency in prescription.In prescription, pass through samarium oxide Sm
2O
3, yittrium oxide Y
2O
3Compound interpolation, by part Sm
3+, y
3+Replace Nd
3+, Sm
3+Ionic radius (0.096nm) and Y
3+Ionic radius (0.089nm) is less than Nd
3+Ionic radius (0.127nm), easier filling also occupies Nd
3+The crystal boundary enrichment is reduced in space around the ion, makes composition more even, improves CaCO
3-Al
2O
3-Nd
2O
3-TiO
2The density of pottery causes the Q value to rise, and has reduced frequency-temperature coefficient.
As shown in Figure 2, the electric field and the Distribution of Magnetic Field of present embodiment TM mould have been provided, the 3D electromagnetism distribution map that has provided simultaneously in Ansoft three-dimensional finite element simulation software is given and checking, as shown in Figure 3, color is deepened along with the increasing of distribution density, in other words, color is dense more, and the distribution density of field is big more.As can be seen, with the TM mould is the dielectric resonator of main mould, magnetic field is that the central shaft with dielectric resonator is the concentric circles in the center of circle, its electric field is the parallel lines that are parallel to dielectric resonator, compare with the resonator of metal material, the magnetic field of TM mould is more concentrated in medium, and electric field is stronger in top of media and bottom, and is also quite strong at the center of medium.In other words, because the field of TM mould is more concentrated in medium, thereby the Q value is more much higher than metal resonators, with TM is that the filter loss of main mould is low, frequency characteristic is more precipitous, particularly is applied to the oscillator of TM mould, has very wide tuning range, good temp characteristic, volume is little, reliability is high.
This example by the mould field of dielectric resonator is selected, the mould frequency characteristic of TM mould and the architectural characteristic of resonator own be to the properties influence research of TM mould, and uses Theoretical Calculation with the method for designing that the emulation of Ansoft three-dimensional finite element combines key technology to be set up the 3D electromagnetic model.Predicted the Electric Field Distribution form of resonator, determined to influence dielectric resonator mould field and selected that a series of key factors of frequency characteristic have adopted the annulus through-hole structure, the bottom is silver-plated, with the cavity welded and installed.Successfully obtain centre frequency 2350MHZ, Q:6500min, TM mould dielectric resonator.The test cavity
As Fig. 3.Than the TE mould dielectric resonator volume of same frequency little nearly half, tuning range is big one times, mode separation is better, does not have parasitic mode in the stopband of octave.The last centre frequency 2350MHZ that has successfully obtained small size, low-loss, high Q value, Q:6500min is applicable to the TM mould dielectric resonator of 4G (TD-LTE) communication base station emission usefulness filter index request.
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. TM mould dielectric resonator, this dielectric resonator is the cylinder ring structured media resonator with through hole, one end of this cylinder ring is coated with metal level or two ends are coated with metal level, it is characterized in that: described cylinder ring adopts microwave dielectric ceramic materials, and the prescription of this microwave dielectric ceramic materials is made up of the material of following quality percentage composition:
Calcium carbonate 25～35%;
Aluminium oxide 6～12%;
Neodymia 15～25%;
Titanium dioxide 30～40%;
Samarium oxide 1～5%;
Yittrium oxide 1～5%.
2. dielectric resonator according to claim 1 is characterized in that: described calcium carbonate, aluminium oxide, neodymia, titanium dioxide quality percentage composition are specially:
Calcium carbonate 30%;
Aluminium oxide 10%;
Neodymia 20%;
Titanium dioxide 35%.
3. dielectric resonator according to claim 1 and 2 is characterized in that: described metal level is a silver layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010147482 CN101800348A (en) | 2010-04-01 | 2010-04-01 | TM membrane dielectric resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010147482 CN101800348A (en) | 2010-04-01 | 2010-04-01 | TM membrane dielectric resonator |
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|---|---|
| CN101800348A true CN101800348A (en) | 2010-08-11 |
Family
ID=42595911
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| CN 201010147482 Pending CN101800348A (en) | 2010-04-01 | 2010-04-01 | TM membrane dielectric resonator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173849A (en) * | 2011-02-18 | 2011-09-07 | 成都泰格微波技术股份有限公司 | Reliable welding method of microwave medium ceramic and metal |
| CN102969549A (en) * | 2012-11-27 | 2013-03-13 | 张家港保税区灿勤科技有限公司 | Novel medium cavity filter with cavity |
| CN103022626A (en) * | 2012-11-20 | 2013-04-03 | 深圳光启创新技术有限公司 | Harmonic oscillator, resonant cavity, filter device and electromagnetic wave equipment |
| CN104157951A (en) * | 2012-11-27 | 2014-11-19 | 张家港保税区灿勤科技有限公司 | Manufacturing method for communication base station waveguide filter |
| CN104270116A (en) * | 2014-09-16 | 2015-01-07 | 张家港保税区灿勤科技有限公司 | Tuning screw, manufacturing technology thereof and L-waveband LC tunable filter with tuning screw |
| CN105552509A (en) * | 2016-01-04 | 2016-05-04 | 张家港保税区灿勤科技有限公司 | Tm dielectric resonator |
| CN105870569A (en) * | 2016-05-04 | 2016-08-17 | 成都天奥电子股份有限公司 | Method for stable installation of dielectric resonator in metal cavity |
Citations (4)
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| CN87103352A (en) * | 1986-05-08 | 1988-03-30 | 兰克西敦技术公司 | Method for manufacturing shaped ceramic composite body by using shielding piece |
| JP2625074B2 (en) * | 1992-06-24 | 1997-06-25 | 京セラ株式会社 | Dielectric ceramic composition and dielectric resonator |
| CN1362941A (en) * | 2000-01-31 | 2002-08-07 | 日本特殊陶业株式会社 | Dielectric porcelain composition and dielectric resonator using the same |
| CN101555135A (en) * | 2009-05-05 | 2009-10-14 | 张家港保税区灿勤科技有限公司 | Microwave medium ceramic material with ultrahigh Q-value middle dielectric constant |
-
2010
- 2010-04-01 CN CN 201010147482 patent/CN101800348A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103352A (en) * | 1986-05-08 | 1988-03-30 | 兰克西敦技术公司 | Method for manufacturing shaped ceramic composite body by using shielding piece |
| JP2625074B2 (en) * | 1992-06-24 | 1997-06-25 | 京セラ株式会社 | Dielectric ceramic composition and dielectric resonator |
| CN1362941A (en) * | 2000-01-31 | 2002-08-07 | 日本特殊陶业株式会社 | Dielectric porcelain composition and dielectric resonator using the same |
| CN101555135A (en) * | 2009-05-05 | 2009-10-14 | 张家港保税区灿勤科技有限公司 | Microwave medium ceramic material with ultrahigh Q-value middle dielectric constant |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173849A (en) * | 2011-02-18 | 2011-09-07 | 成都泰格微波技术股份有限公司 | Reliable welding method of microwave medium ceramic and metal |
| CN103022626A (en) * | 2012-11-20 | 2013-04-03 | 深圳光启创新技术有限公司 | Harmonic oscillator, resonant cavity, filter device and electromagnetic wave equipment |
| CN102969549A (en) * | 2012-11-27 | 2013-03-13 | 张家港保税区灿勤科技有限公司 | Novel medium cavity filter with cavity |
| CN104157951A (en) * | 2012-11-27 | 2014-11-19 | 张家港保税区灿勤科技有限公司 | Manufacturing method for communication base station waveguide filter |
| CN104270116A (en) * | 2014-09-16 | 2015-01-07 | 张家港保税区灿勤科技有限公司 | Tuning screw, manufacturing technology thereof and L-waveband LC tunable filter with tuning screw |
| CN105552509A (en) * | 2016-01-04 | 2016-05-04 | 张家港保税区灿勤科技有限公司 | Tm dielectric resonator |
| CN105870569A (en) * | 2016-05-04 | 2016-08-17 | 成都天奥电子股份有限公司 | Method for stable installation of dielectric resonator in metal cavity |
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Application publication date: 20100811 |