45results about How to "Near zero temperature coefficient" patented technology

The invention discloses a dielectric filter, communication equipment, a method for preparing a dielectric block and a method for preparing the dielectric filter. The dielectric filter comprises: a dielectric block which forms at least two resonant cavities, wherein the at least two resonant cavities are connected; at least a first coupling hole and a second coupling hole, wherein the first coupling hole is arranged on the first surface of the dielectric block, the second coupling hole is arranged on the second surface of the dielectric block, and the first surface and the second surface are arranged oppositely; and a metal layer which covers the surface of the dielectric block, the surface of the first coupling hole and the surface of the second coupling hole, wherein materials of the dielectric filter at least comprise zinc oxide, silicon dioxide and magnesium oxide. In this way, the accuracy of debugging the transmission zero point can be improved; and the dielectric constant is low,the loss is low, the temperature coefficient is close to zero, and the dielectric property of the dielectric filter can be improved.

The invention discloses a preparation method of a microwave dielectric ceramic material and a dielectric ceramic block. The method for preparing the microwave dielectric ceramic material comprises thefollowing steps of: providing raw materials corresponding to calcium carbonate, samarium sesquioxide, aluminum oxide and titanium dioxide; adding an organic solvent and grinding balls, and carrying out primary ball milling; drying the slurry obtained by the primary ball milling, and calcining to obtain a ceramic body; crushing the ceramic body, adding an organic solvent and grinding balls, and carrying out secondary ball milling; drying the slurry obtained by the secondary ball milling; mixing the obtained powder with a binder to form slurry, and granulating; carrying out dry pressing moldingin a mold; and removing the binder and sintering again. The microwave dielectric ceramic material prepared by the method is mainly composed of calcium carbonate, samarium sesquioxide, aluminum oxideand titanium dioxide, and has the advantages of low dielectric constant, low loss and near-zero temperature coefficient. Therefore, the microwave dielectric ceramic material provided by the inventionhas improved microwave dielectric properties.

The invention provides a dielectric filter, a method for preparing the dielectric filter and communication equipment. The dielectric filter comprises a plurality of dielectric blocks and at least twofirst dielectric plates, the plurality of dielectric blocks are arranged at intervals, and the at least two first dielectric plates are sequentially arranged between two spatially adjacent dielectricblocks to form a main coupling path sequentially passing through the plurality of dielectric blocks, wherein the dielectric block and the first dielectric plate are integrally sintered and molded; andcompared with a mode of splicing and forming a plurality of dielectric blocks in the prior art, the method is advantageous in that a positioning process and a secondary sintering process required ina splicing process are cancelled, the process complexity is reduced, the structure is simple, the dielectric filter is suitable for mass production, the problem of low splicing precision of coupling windows of a plurality of dielectric blocks caused by size errors in the positioning process is eliminated, and the stability and consistency of the dielectric filter are improved.

The invention discloses a filter, communication equipment, a method for preparing a dielectric block and a method for preparing a filter. The filter comprises a dielectric block which is provided withN cascaded hollow resonant cavities, and a first window is arranged between the two cascaded hollow resonant cavities, wherein N is a natural number greater than 1, and materials of the filter at least comprise zinc oxide, silicon dioxide and magnesium oxide. By means of the mode, far-end out-of-band rejection can be greatly improved, clutters are pushed to a higher frequency, near-frequency-bandinterference is reduced, and the stability of the performance of the filter is improved; and the filter has a low dielectric constant, low loss and a near-zero temperature coefficient, so that the dielectric property of the filter can be improved.

The invention provides a dielectric resonator, a dielectric filter, communication equipment and a method for preparing a dielectric block. A hollowed-out groove is formed in an area adjacent to a first end face through a dielectric block, the dielectric block is equally divided into two parts in the direction perpendicular to the length direction, then the geometric center of the part where the first end face is located is located in the hollowed-out groove, and materials of the resonator at least comprise strontium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. By implementing the invention, the ratio of the secondary resonant frequency to the fundamental mode resonant frequency of the dielectric resonator can be improved, so that after the dielectric resonator is applied to the dielectric filter, the out-of-band harmonic characteristic of the dielectric filter is improved, and the dielectric resonator is simple in structure, easy to form and suitable for mass production.

The invention discloses a preparation method of a dielectric ceramic material, and relates to the field of ceramic materials. The preparation method comprises the steps of S1, weighing the following raw materials in percentage by weight: 38-45% of zinc oxide, 48-56% of aluminum oxide, 6-12% of titanium dioxide and 0.1-1% of manganese oxide; S2, carrying out primary treatment on the weighed powder to obtain primary powder, wherein the primary treatment process comprises primary mixing, filter pressing, drying and presintering treatment; S3, carrying out secondary treatment on the primary powder to obtain secondary powder, wherein the secondary treatment process comprises secondary mixing and granulation treatment; and S4, enabling the secondary powder to be subjected to forming treatment, and obtaining a blank, and after the blank is subjected to plastic removal treatment, sending the blank to a sintering furnace for sintering treatment, wherein the sintering temperature ranges from 1260 DEG C to 1300 DEG C, the sintering time ranges from 2 h to 4 h, and finally the dielectric ceramic material is obtained. The dielectric ceramic material disclosed by the invention has relatively high Qf, has a temperature coefficient close to 0 and is low in sintering temperature.

The invention discloses a dielectric filter, a method for preparing the dielectric filter and communication equipment. The dielectric filter provided by the embodiment of the invention at least comprises: two layers of dielectric blocks which are arranged at intervals and respectively comprise at least two dielectric resonance units which are cascaded in sequence; a first dielectric coupling piecewhich is arranged between the two layers of dielectric blocks; and a second dielectric coupling piece which is arranged between the two layers of dielectric blocks and is used to couple the two dielectric resonance units which are arranged adjacent to each other in space, but are not arranged adjacent to each other along the main coupling path. The second dielectric coupling piece couples the other two dielectric resonance units, except the two dielectric resonance units coupled by the first dielectric coupling piece, of the two layers of dielectric blocks to form a CQ cross coupling path; and materials of the dielectric filter at least comprise zinc oxide, silicon dioxide and magnesium oxide. In this way, the structure of the dielectric filter with CQ cross coupling can be simplified, and the size of the dielectric filter is reduced.

The invention discloses a dielectric filter, communication equipment, a method for preparing a dielectric block and a method for preparing the dielectric filter. The dielectric filter comprises: a first dielectric resonator which at least comprises a first dielectric block; a second dielectric resonator which at least comprises a second dielectric block; and a dielectric coupling plate which is arranged between the first dielectric block and the second dielectric block and connected with the first dielectric block and the second dielectric block, wherein the dielectric coupling plate is used for realizing coupling between the first dielectric resonator and the second dielectric resonator, and materials of the dielectric filter at least comprise magnesium oxide, calcium oxide, titanium dioxide and zinc oxide. According to the embodiment of the invention, the electromagnetic signal coupling effect of the dielectric filter can be improved, interference is reduced, and the performance canbe optimized; and the dielectric constant is low, the loss is low, the temperature coefficient is close to zero, and the dielectric property of the dielectric filter can be improved.

The invention discloses a dielectric filter, communication equipment, a method for preparing a dielectric block and a method for preparing the dielectric filter. The dielectric filter comprises: a dielectric block which forms at least two resonant cavities, wherein the at least two resonant cavities are connected; at least a first coupling hole and a second coupling hole, wherein the first coupling hole is arranged on the first surface of the dielectric block, the second coupling hole is arranged on the second surface of the dielectric block, and the first surface and the second surface are arranged oppositely; and a metal layer which covers the surface of the dielectric block, the surface of the first coupling hole and the surface of the second coupling hole, wherein materials of the dielectric filter at least comprise calcium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. In this way, the accuracy of debugging the transmission zero point can be improved; and the dielectric constant is low, the loss is low, the temperature coefficient is close to zero, and the dielectric property of the dielectric filter can be improved.

The invention discloses a filter, communication equipment, a method for preparing a dielectric block and method for preparing a filter. The filter comprises a dielectric block which is provided with Ncascaded hollow resonant cavities, and a first window is arranged between the two cascaded hollow resonant cavities, wherein N is a natural number greater than 1, and materials of the filter at leastcomprise calcium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. By means of the mode, far-end out-of-band rejection can be greatly improved, clutters are pushed to a higher frequency, near-frequency-band interference is reduced, and the stability of the performance of the filter is improved; and the filter has a low dielectric constant, low loss and a near-zero temperature coefficient, so that the dielectric property of the filter can be improved.

The invention discloses a temperature-stable microwave dielectric ceramic, which is prepared by sintering a main material and an auxiliary material. The chemical structural formula of the main material is Mg2Al4Si5O18, the chemical structural formula of the auxiliary material is Zr0.6Sn0.4TiO4, and the chemical expression of the microwave dielectric ceramic is (100-x) wt% Mg2Al4Si5O18-x wt% Zr0.6Sn0.4TiO4, relative to the total amount of the main material and the auxiliary material, the mass percent of the auxiliary material is x wt%, and x is greater than or equal to 1 and less than or equal to 10. The invention also discloses a preparation method and application of the temperature-stable microwave dielectric ceramic. The microwave dielectric ceramic provided by the invention has excellent microwave dielectric properties, not only improves the quality factor to a certain extent, but also has better temperature stability at high temperature and low temperature, has a lower dielectric constant, and has wide application prospects.

The invention provides a dielectric resonator, a dielectric filter, communication equipment and a method for preparing a dielectric block. A first hollowed-out groove and a second hollowed-out grooveare formed in an area adjacent to a first end face and an area adjacent to a second end face through a dielectric block respectively; and after the dielectric block is equally divided into two parts in the direction perpendicular to the length direction, the geometric center of the part where the first end face is located is located in the first hollowed-out groove, the geometric center of the part where the second end face is located is located in the second hollowed-out groove, and materials of the dielectric resonator at least comprise magnesium oxide, calcium oxide, titanium dioxide and zinc oxide. By implementing the invention, the ratio of the secondary resonant frequency to the fundamental mode resonant frequency of the dielectric resonator can be improved, so that after the dielectric resonator is applied to the dielectric filter, the out-of-band harmonic characteristic of the dielectric filter is improved, and the dielectric resonator is simple in structure, easy to form and suitable for mass production.

The invention discloses a dielectric filter, communication equipment, a dielectric resonator and a preparation method thereof. The dielectric resonator comprises: a dielectric body which is provided with at least one blind hole; a metal layer which covers the surface of the dielectric body; a first nut which is arranged in the blind hole; and a first adjusting screw rod which is arranged in the blind hole through a first nut, wherein materials of the dielectric resonator at least comprise zinc oxide, silicon dioxide and magnesium oxide. The thickness of the dielectric resonator can be reduced,and then the size of the dielectric resonator is reduced.

The invention provides a dielectric resonator, a dielectric filter, communication equipment and a method for preparing a dielectric block. A hollowed-out groove is formed in an area adjacent to a first end face through a dielectric block, the dielectric block is equally divided into two parts in the direction perpendicular to the length direction, then the geometric center of the part where the first end face is located is located in the hollowed-out groove, and materials of the resonator at least comprise calcium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. By implementing the invention, the ratio of the secondary resonant frequency to the fundamental mode resonant frequency of the dielectric resonator can be improved, so that after the dielectric resonator is applied to the dielectric filter, the out-of-band harmonic characteristic of the dielectric filter is improved, and the dielectric resonator is simple in structure, easy to form and suitable for mass production.

The invention discloses a dielectric filter, a method for preparing the dielectric filter and communication equipment. The dielectric filter provided by the embodiment of the invention at least comprises: two layers of dielectric blocks which are arranged at intervals and respectively comprise at least two dielectric resonance units which are cascaded in sequence; a first dielectric coupling piecewhich is arranged between the two layers of dielectric blocks; and a second dielectric coupling piece which is arranged between the two layers of dielectric blocks and is used to couple the two dielectric resonance units are arranged adjacent to each other in space, but are not arranged adjacent to each other along the main coupling path. The second dielectric coupling piece couples the other twodielectric resonance units, except the two dielectric resonance units coupled by the first dielectric coupling piece, of the two layers of dielectric blocks to form a CQ cross coupling path; and materials of the dielectric filter at least comprise strontium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. In this way, the structure of the dielectric filter with CQ cross couplingcan be simplified, and the size of the dielectric filter is reduced.

The invention provides a dielectric filter, a preparation method thereof and communication equipment. According to the dielectric filter, at least two dielectric blocks are arranged side by side to form the dielectric filter, the length required by the dielectric block when the dielectric filter is formed by only one dielectric block is reduced, the application range of the dielectric filter is expanded, the risk of bending deformation of the dielectric block in the sintering process is reduced or even eliminated, the yield is improved, and the dielectric filter is simple in structure, easy toform and suitable for mass production.

The invention discloses a filter, communication equipment and methods for preparing a dielectric block and a filter. The filter comprises a dielectric block which is provided with N cascaded hollow resonant cavities, and a first window is arranged between the two cascaded hollow resonant cavities, wherein N is a natural number greater than 1, and materials of the filter at least comprise strontiumcarbonate, samarium trioxide, aluminum oxide and titanium dioxide. By means of the mode, far-end out-of-band rejection can be greatly improved, clutters are pushed to a higher frequency, near-frequency-band interference is reduced, and the stability of the performance of the filter is improved; and the filter has a low dielectric constant, low loss and a near-zero temperature coefficient, so thatthe dielectric property of the filter can be improved.

The invention discloses a dielectric filter, communication equipment, a method for preparing a dielectric block and a method for preparing the dielectric filter. The dielectric filter comprises: a dielectric block which forms at least two resonant cavities, wherein the at least two resonant cavities are connected; at least a first coupling hole and a second coupling hole, wherein the first coupling hole is arranged on the first surface of the dielectric block, the second coupling hole is arranged on the second surface of the dielectric block, and the first surface and the second surface are arranged oppositely; and a metal layer which covers the surface of the dielectric block, the surface of the first coupling hole and the surface of the second coupling hole, wherein materials of the dielectric filter at least comprise magnesium oxide, calcium oxide, titanium dioxide and zinc oxide. In this way, the accuracy of debugging the transmission zero point can be improved; and the dielectricconstant is low, the loss is low, the temperature coefficient is close to zero, and the dielectric property of the dielectric filter can be improved.

The invention discloses a microwave dielectric ceramic material, a dielectric ceramic block and microwave communication equipment. The microwave dielectric ceramic material comprises magnesium oxide,calcium oxide, titanium dioxide and zinc oxide. The microwave dielectric ceramic material provided by the invention is mainly composed of magnesium oxide, calcium oxide, titanium dioxide and zinc oxide, and has the advantages of low dielectric constant, low loss and near-zero temperature coefficient. Therefore, the microwave dielectric ceramic material provided by the invention has improved microwave dielectric properties.

The invention discloses a dielectric filter, communication equipment, a dielectric resonator and a preparation method thereof. The dielectric resonator comprises: a dielectric body which is provided with at least one blind hole; a metal layer which covers the surface of the dielectric body; a first nut which is arranged in the blind hole; and a first adjusting screw rod which is arranged in the blind hole through a first nut, wherein materials of the dielectric resonator at least comprise strontium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. The thickness of the dielectric resonator can be reduced, and then the size of the dielectric resonator is reduced.

The invention provides a dielectric filter, a method for preparing the dielectric filter and communication equipment. The dielectric filter comprises a plurality of dielectric blocks and at least twofirst dielectric plates, the plurality of dielectric blocks are arranged at intervals, and the at least two first dielectric plates are sequentially arranged between two spatially adjacent dielectricblocks to form a main coupling path sequentially passing through the plurality of dielectric blocks, wherein the dielectric block and the first dielectric plate are integrally sintered and molded; andcompared with a mode of splicing and forming a plurality of dielectric blocks in the prior art, the method is advantageous in that a positioning process and a secondary sintering process required ina splicing process are cancelled, the process complexity is reduced, the structure is simple, the dielectric filter is suitable for mass production, the problem of low splicing precision of coupling windows of a plurality of dielectric blocks caused by size errors in the positioning process is eliminated, and the stability and consistency of the dielectric filter are improved.

The invention discloses a dielectric filter, communication equipment, a method for preparing a dielectric block and a method for preparing the dielectric filter. The dielectric filter comprises a first dielectric resonator which at least comprises a first dielectric block; a second dielectric resonator which at least comprises a second dielectric block; a dielectric coupling plate which is arranged between the first dielectric block and the second dielectric block and connected with the first dielectric block and the second dielectric block, wherein the dielectric coupling plate is used for realizing coupling between the first dielectric resonator and the second dielectric resonator, and materials of the dielectric filter at least comprise strontium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. According to the embodiment of the invention, the electromagnetic signal coupling effect of the dielectric filter can be improved, interference is reduced, and the performance can be optimized; and the dielectric filter provided by the embodiment of the invention has improved microwave dielectric properties.

The invention provides a dielectric resonator, a dielectric filter, communication equipment and a method for preparing a dielectric block. A first hollowed-out groove and a second hollowed-out grooveare formed in an area adjacent to a first end face and an area adjacent to a second end face through a dielectric block respectively; and after the dielectric block is equally divided into two parts in the direction perpendicular to the length direction, the geometric center of the part where the first end face is located is located in the first hollowed-out groove, the geometric center of the part where the second end face is located is located in the second hollowed-out groove, and materials of the dielectric resonator at least comprise zinc oxide, silicon dioxide and magnesium oxide. By implementing the invention, the ratio of the secondary resonant frequency to the fundamental mode resonant frequency of the dielectric resonator can be improved, so that after the dielectric resonator isapplied to the dielectric filter, the out-of-band harmonic characteristic of the dielectric filter is improved, and the dielectric resonator is simple in structure, easy to form and suitable for massproduction.

The invention discloses a dielectric filter applied to a 5G communication system, communication equipment, a method for preparing a dielectric block and a method for preparing the dielectric filter. The dielectric filter comprises: a first dielectric block, a second dielectric block, a third dielectric block, a coupling structure and a metal layer. A coupling structure is arranged on the contactsurface of the first dielectric block and the third dielectric block, a coupling structure is arranged on the contact surface of the second dielectric block and the third dielectric block, the first dielectric block, the second dielectric block, the third dielectric block and the coupling structure are integrally formed to obtain the dielectric block, and the metal layer covers the surface of thedielectric block, wherein materials of the dielectric filter at least comprise calcium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. According to the invention, a gap at the jointof the first dielectric block and the third dielectric block or the joint of the second dielectric block and the third dielectric block can be avoided, signal leakage is prevented, and the performance of the dielectric filter is improved.

The invention provides a dielectric resonator, a dielectric filter, communication equipment and a method for preparing a dielectric block. A first hollowed-out groove and a second hollowed-out grooveare formed in an area adjacent to a first end face and an area adjacent to a second end face through a dielectric block respectively; and after the dielectric block is equally divided into two parts in the direction perpendicular to the length direction, the geometric center of the part where the first end face is located is located in the first hollowed-out groove, the geometric center of the part where the second end face is located is located in the second hollowed-out groove, and materials of the resonator at least comprise strontium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. By implementing the invention, the ratio of the secondary resonant frequency to the fundamental mode resonant frequency of the dielectric resonator can be improved, so that after the dielectric resonator is applied to the dielectric filter, the out-of-band harmonic characteristic of the dielectric filter is improved, and the dielectric resonator is simple in structure, easy to form andsuitable for mass production.

The invention discloses a preparation method of a microwave dielectric ceramic material and a dielectric ceramic block. The method for preparing the microwave dielectric ceramic comprises the following steps of: providing raw materials corresponding to zinc oxide, silicon dioxide and magnesium oxide; adding an organic solvent and grinding balls, and carrying out primary ball milling; drying the slurry obtained by the primary ball milling, and calcining to obtain a ceramic body; crushing the ceramic body, adding an organic solvent and grinding balls, and carrying out secondary ball milling; drying the slurry obtained by the secondary ball milling; mixing the obtained powder with a binder to form slurry, and granulating; carrying out dry pressing molding in a mold; and removing the binder and sintering again. The microwave dielectric ceramic prepared by the method is mainly composed of zinc oxide, silicon dioxide and magnesium oxide, and has the advantages of low dielectric constant, lowloss and near-zero temperature coefficient. Therefore, the microwave dielectric ceramic material provided by the invention has improved microwave dielectric properties.

The invention discloses a dielectric filter, a method for preparing the dielectric filter and communication equipment. The dielectric filter provided by the embodiment of the invention at least comprises: two layers of dielectric blocks which are arranged at intervals and respectively comprise at least two dielectric resonance units which are cascaded in sequence; a first dielectric coupling piecewhich is arranged between the two layers of dielectric blocks; and a second dielectric coupling piece which is arranged between the two layers of dielectric blocks and is used to couple the two dielectric resonance units are arranged adjacent to each other in space, but are not arranged adjacent to each other along the main coupling path. The second dielectric coupling piece couples the other twodielectric resonance units, except the two dielectric resonance units coupled by the first dielectric coupling piece, of the two layers of dielectric blocks to form a CQ cross coupling path; and materials of the dielectric filter at least comprise calcium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. In this way, the structure of the dielectric filter with CQ cross coupling can be simplified, and the size of the dielectric filter is reduced.

The invention discloses a preparation method of a microwave dielectric ceramic material and a dielectric ceramic block. The method for preparing the microwave dielectric ceramic material comprises thefollowing steps of: providing raw materials corresponding to strontium carbonate, samarium sesquioxide, aluminum oxide and titanium dioxide; adding an organic solvent and grinding balls, and carryingout primary ball milling; drying the slurry obtained by the primary ball milling, and calcining to obtain a ceramic body; crushing the ceramic body, adding an organic solvent and grinding balls, andcarrying out secondary ball milling; drying the slurry obtained by the secondary ball milling; mixing the obtained powder with a binder to form slurry, and granulating; carrying out dry pressing molding in a mold; and removing the binder and sintering again. The microwave dielectric ceramic material prepared by the method is mainly composed of strontium carbonate, samarium sesquioxide, aluminum oxide and titanium dioxide, and has the advantages of low dielectric constant, low loss and near-zero temperature coefficient. Therefore, the microwave dielectric ceramic material provided by the invention has improved microwave dielectric properties.

The invention discloses a dielectric filter, communication equipment, a method for preparing a dielectric block and a method for preparing the dielectric filter. The dielectric filter comprises a first dielectric resonator which at least comprises a first dielectric block; a second dielectric resonator which at least comprises a second dielectric block; and a dielectric coupling plate which is arranged between the first dielectric block and the second dielectric block and connected with the first dielectric block and the second dielectric block, wherein the dielectric coupling plate is used for realizing coupling between the first dielectric resonator and the second dielectric resonator, and materials of the dielectric filter at least comprise calcium carbonate, samarium trioxide, aluminumoxide and titanium dioxide. According to the embodiment of the invention, the electromagnetic signal coupling effect of the dielectric filter can be improved, interference is reduced, and the performance can be optimized; and the dielectric filter provided by the embodiment of the invention has improved microwave dielectric properties.

The invention discloses a dielectric filter, a method for preparing the dielectric filter and communication equipment. According to the embodiment of the invention, the dielectric filter comprises: atleast two dielectric block combinations which are arranged side by side at intervals and respectively comprise at least two dielectric blocks which are arranged in a coplanar manner at intervals; a first dielectric coupling piece which is arranged between the at least two dielectric block combinations; and a second dielectric coupling piece which is arranged between at least two dielectric blockswhich are combined by the same dielectric block and are arranged adjacently in space so as to form a cross coupling path, wherein the at least two dielectric block combinations, the first dielectriccoupling piece and the second dielectric coupling piece are integrally sintered and formed, and materials of the dielectric filter at least comprise magnesium oxide, calcium oxide, titanium dioxide and zinc oxide. In this way, the production efficiency can be improved, the cost is saved, and mass production is facilitated; and the size can be reduced while the characteristics such as out-of-band rejection are improved.