CN205211898U - Novel medium bimodulus band pass filter - Google Patents
Novel medium bimodulus band pass filter Download PDFInfo
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- CN205211898U CN205211898U CN201521041543.4U CN201521041543U CN205211898U CN 205211898 U CN205211898 U CN 205211898U CN 201521041543 U CN201521041543 U CN 201521041543U CN 205211898 U CN205211898 U CN 205211898U
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Abstract
The utility model discloses a novel medium bimodulus band pass filter, a dielectric resonator is placed to the center of cavity, dielectric resonator's upper and lower both ends and cavity meet, insert first metal screw and second metal screw around the dielectric resonator, the horizontal central line of first metal screw is perpendicular with the horizontal central line of second metal screw, first metal screw and second metal screw are used for controlling the resonant frequency of two mode of resonances of dielectric resonator, the magnetic field distribution department of accompanying each other of two mode of resonances of dielectric resonator is provided with closed becket, closed becket is used for controlling the coupling strength between two mode of resonances of dielectric resonator. The utility model discloses a medium bimodulus band pass filter simple structure, realization convenience are inserted the metal screw and are set up closed becket around a dielectric resonator, can utilize metal screw and closed becket to realize frequency and coupling control.
Description
Technical field
The utility model relates to a kind of dielectric filter, and especially a kind of novel medium bimodule band-pass filter, belongs to technical field of micro communication.
Background technology
Dielectric filter due to the performance of its small and exquisite volume, good thermal stability, low insertion loss and high q-factor, in satellite and honeycomb base station device extensive use.Its medium single mode filter is because of the feature for ease of manufacturing and easily design coupled structure, be widely used in wireless communication industry, and medium multi-mode filter utilizes multiple modes of resonance of same dielectric resonator, can provide more miniaturized advantage, this is of crucial importance for satellite system.In practical application, manufacture the technical barrier that processing is medium multi-mode filter.Traditional medium multi-mode filter, in order to realize coupling, needs to carry out borehole corner cut to medium block, too increases processing cost while bringing technical difficulty to processing.
According to investigations with understanding, disclosed prior art is as follows:
1) people such as Ke-LiWu in 2013 has delivered " ADual-ModeDielectricResonatorFilterWithPlanarCouplingCon figuration " on IEEETrans.Microwave.TheoryTech, and article adopts two TM of disc dielectric resonator
11degenerate mode, inserts metallic screw by borehole in dielectric resonator, realize to the control of two mode frequencies and and pattern between the control of stiffness of coupling, thus design medium dual mode filter.The advantage of this structure is that structure is simply clear, is easy to utilize planar topologies to design multi-stage filter; Shortcoming is that the processing of borehole to dielectric resonator brings difficulty.
2) 2009, foreign scholar MohammadMemarian and RaafatR.Mansour has delivered " Quad-ModeandDual-ModeDielectricResonatorFilters " at IEEETrans.Microwave.TheoryTech, two groups of degenerate mode designs are utilized to achieve the dielectric filter of single chamber four mould in document, in addition also dielectric resonator to hemisection, realize medium dual mode filter; In the publication, according to the difference of the mode of resonance adopted, screw control frequency and coupling is utilized.
3) people such as foreign scholar M.M.Rahman and WeiliWang has delivered " ACompactTriple-modePlatedCeramicBlockBasedHybridFilterfo rBase-stationApplication " on 34thMicrowaveConference, article utilizes medium block beveling technique, realize the coupling of rectangular cavity three degenerate modes, utilize screw to control the resonance frequency of each pattern simultaneously, finally silver-plated operation is carried out to medium block.Article also adopts coaxial filter to suppress higher mode simultaneously.The advantage of this structure is the employing of multi-cavity structure and coaxial cavity, improve Out-of-band rejection and inhibit higher mode, return loss is also fine simultaneously, and shortcoming is no matter corner cut or insert screw, all need first to carry out the operation of corner cut borehole to medium block, difficulty of processing is high.
In sum, more published medium multi-mode filter article or patent documentation relate to and carry out corner cut or borehole to medium block, the method and structure process technology difficulty carried is large, cost is high, and published medium multi-mode filter article or patent documentation relate to single chamber medium multi-mode filter more, structure is more complicated, is not suitable for the design of multistage multi-cavity high performance filter, the limited capacity that institute's extracting method and structure realize.
Utility model content
The purpose of this utility model is the defect in order to solve above-mentioned prior art, provide a kind of novel medium bimodule band-pass filter, this filter construction is simple, realization is convenient, metallic screw and closed becket can be utilized to realize frequency and coupling control, and Topology Structure Design can be utilized to become multi-cavity, high performance filter.
The purpose of this utility model can reach by taking following technical scheme:
A kind of novel medium bimodule band-pass filter, comprise cavity, a dielectric resonator is placed in the center of described cavity, and the upper/lower terminal of described dielectric resonator connects with cavity;
Insertion first metallic screw and the second metallic screw around described dielectric resonator, the cross central line of described first metallic screw is vertical with the cross central line of the second metallic screw, and described first metallic screw and the second metallic screw are used for the resonance frequency of control medium resonator two modes of resonance;
The Distribution of Magnetic Field place of accompanying each other of described dielectric resonator two modes of resonance is provided with closed becket, and described closed becket is used for the stiffness of coupling between control medium resonator two modes of resonance.
As a kind of embodiment, described cavity is provided with the first port on the position relative with the first metallic screw, described first port is provided with the first coaxial line, and be provided with the first becket between the first port and dielectric resonator, the inner wire of one termination first coaxial line of described first becket, the bottom surface of another termination cavity; Described first becket is for controlling the stiffness of coupling between the first port and the mode of resonance of excitation;
Described cavity is provided with the second port on the position relative with the second metallic screw, described second port is provided with the second coaxial line, and be provided with the second becket between the second port and dielectric resonator, the inner wire of one termination second coaxial line of described second becket, the bottom surface of another termination cavity; Described second becket is for controlling the stiffness of coupling between the second port and the mode of resonance of excitation.
As a kind of embodiment, described first becket and the second becket are annulus or straight-flanked ring.
As a kind of embodiment, described cavity is cylindrical cavity or polygon cavity.
As a kind of embodiment, described dielectric resonator is disc shape media resonator, cylindrical di resonator or polygonal medium resonator.
As a kind of embodiment, described polygonal medium resonator is Rectangular Enclosure with Participating Media resonator; When described dielectric resonator is Rectangular Enclosure with Participating Media resonator, described first metallic screw and the second metallic screw are inserted on two adjacent lateral surfaces of Rectangular Enclosure with Participating Media resonator respectively.
The utility model has following beneficial effect relative to prior art:
1, medium bimodule band-pass filter of the present utility model inserts metallic screw and arranges closed becket around a dielectric resonator, metallic screw and closed becket can be utilized to realize frequency and coupling control, instead of tradition to operate the borehole corner cut of medium block, thus solve the processing problems of medium block, high degree reduces difficulty of processing and the processing cost of dielectric resonator, utilize the medium dual mode filter of this Technology design possessing high performance while, structure is also fairly simple, and realizes conveniently.
2, metallic screw is inserted in the position that medium bimodule band-pass filter of the present utility model is suitable around a dielectric resonator, realizes the FREQUENCY CONTROL to mode of resonance by the length of adjustment metallic screw; Same at the Distribution of Magnetic Field place of accompanying each other of dielectric resonator two modes of resonance closed becket, the control realizing being coupled between mode of resonance by regulating the size of closed becket (height or width); Between the port and dielectric resonator of cavity, becket is set, can control end stiffness of coupling by the area changing becket, the stiffness of coupling namely between port and the mode of resonance of excitation.
3, the single chamber medium dual mode filter designed by the utility model due to structure simple, thus planar topologies can be utilized to design multistage multi-cavity band pass filter, more high out-of-side rejection can be realized, more upper passband rectangular degree contour performance band pass filter index, facilitate the introduction of transmission zero simultaneously, the performance of filter can be improved further, solve existing single chamber medium multi-mode filter complex structure, be not suitable for the design of multistage multi-cavity high performance filter, the problem of the limited capacity realized.
Accompanying drawing explanation
Fig. 1 is the medium bimodule band-pass filter three-dimensional structure diagram of the utility model embodiment 1.
Fig. 2 is the structure chart of the cavity placement dielectric resonator of the utility model embodiment 1.
Fig. 3 is the TM of the utility model embodiment 1
120the Distribution of Magnetic Field figure of pattern.
Fig. 4 is the TM of the utility model embodiment 1
210the Distribution of Magnetic Field figure of pattern.
Fig. 5 is the structure chart of the trailing flank insertion metallic screw of the dielectric resonator of the utility model embodiment 1.
Fig. 6 is the TM of the utility model embodiment 1
120the resonance frequency controlling curve figure of pattern.
Fig. 7 is the dielectric resonator of the utility model embodiment 1 arranges closed becket structure chart at the Distribution of Magnetic Field place of accompanying each other of two resonance frequencys.
Fig. 8 is the TM of the utility model embodiment 1
120pattern and TM
210stiffness of coupling controlling curve figure between pattern.
Fig. 9 is the structure chart arranging becket between the first port of the utility model embodiment 1 and dielectric resonator.
Figure 10 is the end stiffness of coupling controlling curve figure of the utility model embodiment 1.
Figure 11 is the Fourth Order Linear topology diagram of the utility model embodiment 2.
Figure 12 is the three-dimensional structure diagram of the two-chamber medium bimodule band-pass filter based on Rectangular Enclosure with Participating Media resonator of the utility model embodiment 2.
Figure 13 is that the two-chamber medium bimodule band-pass filter based on Rectangular Enclosure with Participating Media resonator of the utility model embodiment 2 adopts closed becket to realize the controlling curve figure that is coupled between chamber.
Figure 14 is the S parameter response curve of the two-chamber medium bimodule band-pass filter based on Rectangular Enclosure with Participating Media resonator of the utility model embodiment 2.
Figure 15 is eight rank linear topology structure charts of the utility model embodiment 3.
Figure 16 is the three-dimensional structure diagram of the four chamber medium bimodule band-pass filters based on Rectangular Enclosure with Participating Media resonator of the utility model embodiment 3.
Figure 17 is the S parameter response curve of the four chamber medium bimodule band-pass filters based on Rectangular Enclosure with Participating Media resonator of the utility model embodiment 3.
Figure 18 is the Fourth Order Linear topology diagram of the utility model embodiment 5.
Figure 19 is the front three-dimensional structure diagram of the horizontal model of the two-chamber medium bimodule band-pass filter based on disc shape media resonator of the utility model embodiment 5.
Figure 20 is the back side three-dimensional structure diagram of the horizontal model of the two-chamber medium bimodule band-pass filter based on disc shape media resonator of the utility model embodiment 5.
Figure 21 is the S parameter response curve of the horizontal model of the two-chamber medium bimodule band-pass filter based on disc shape media resonator of the utility model embodiment 5.
Figure 22 is the front three-dimensional structure diagram of the vertical mould of the two-chamber medium bimodule band-pass filter based on disc shape media resonator of the utility model embodiment 6.
Figure 23 is the back side three-dimensional structure diagram of the vertical mould of the two-chamber medium bimodule band-pass filter based on disc shape media resonator of the utility model embodiment 6.
Figure 24 is that the vertical mould of the two-chamber medium bimodule band-pass filter based on disc shape media resonator of the utility model embodiment 6 adopts closed becket to realize the controlling curve figure that is coupled between chamber.
Figure 25 is the S parameter response curve of the vertical mould of the two-chamber medium bimodule band-pass filter based on disc shape media resonator of the utility model embodiment 6.
Wherein, 1-cavity, 2-dielectric resonator, 3-first metallic screw, 4-second metallic screw, 5-closes becket, 6-first coaxial line, 7-first becket, 8-second coaxial line, 9-second becket.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment 1:
As shown in Figure 1, the medium bimodule band-pass filter of the present embodiment comprises cavity 1, described cavity 1 is rectangular cavities, it is of a size of 30mm*30mm*10mm, a dielectric resonator 2 is placed in the center of cavity 1, the upper/lower terminal of described dielectric resonator 2 connects with cavity 1, and two degenerate modes (i.e. mode of resonance) that dielectric resonator 2 adopts are called TM
120pattern and TM
210pattern;
Described dielectric resonator 2 is Rectangular Enclosure with Participating Media resonator, it is of a size of 20mm*20mm*10mm, medium relative dielectric constant is 21.4, be applicable to 2.6GHz frequency range, at adjacent two lateral surfaces of dielectric resonator 2 (in the present embodiment, two lateral surfaces are trailing flank and left surface) go up insertion first metallic screw 3 and the second metallic screw 4, can find out that the cross central line of the first metallic screw 3 is vertical with the cross central line of the second metallic screw 4, described first metallic screw 3 and the second metallic screw 4 are for the resonance frequency of control medium resonator 2 two modes of resonance, that wherein the first metallic screw 3 controls is TM
120the resonance frequency of pattern, that the second metallic screw 4 controls is TM
210the resonance frequency of pattern,
At described dielectric resonator 2 two mode of resonance (TM
120pattern and TM
210pattern) the Distribution of Magnetic Field place of accompanying each other be provided with closed becket 5; The leading flank of dielectric resonator 2 and the trailing flank of right flank intersection and dielectric resonator 2 and left surface intersection are all that the Distribution of Magnetic Field of two modes of resonance is accompanied each other place, the first metallic screw 3 due to the present embodiment is positioned at the trailing flank of dielectric resonator 2, second metallic screw 4 is positioned at the left surface of dielectric resonator 2, therefore closed becket 5 is arranged on leading flank and the right flank intersection of dielectric resonator 2, described closed becket 5 to establish for control medium resonator 2 two modes of resonance between stiffness of coupling;
Described cavity 1 is provided with the first port on the position relative with the first metallic screw 3, described first port is provided with the first coaxial line 6, and between the first port and dielectric resonator 2, be provided with the first becket 7, the inner wire of one termination first coaxial line 6 of described first becket 7, the bottom surface of another termination cavity 1; Described first becket 7 is for controlling the mode of resonance (TM of the first port and excitation
120pattern) between stiffness of coupling, namely hold stiffness of coupling;
Described cavity 1 is provided with the second port on the position relative with the second metallic screw 4, described second port is provided with the second coaxial line 8, and between the second port and dielectric resonator 2, be provided with the second becket 9, the inner wire of one termination second coaxial line 8 of described second becket 9, the bottom surface of another termination cavity 1; Described second becket 9 is for controlling the mode of resonance (TM of the second port and excitation
210pattern) between stiffness of coupling, namely hold stiffness of coupling.
Described first port and the second port can as input ports, also can as output port.
The analytic process of the medium bimodule band-pass filter design of the present embodiment is as follows:
1) place a dielectric resonator 2 in the center of cavity 1, and the upper/lower terminal of dielectric resonator 2 all directly connects with cavity 1, as shown in Figure 2; Two degenerate modes adopted are called TM
120pattern and TM
210pattern, the Distribution of Magnetic Field of two modes of resonance as shown in Figure 3 and Figure 4.
2) insert metallic screw by position suitable around dielectric resonator 2, can realize controlling the resonance frequency of mode of resonance, the present embodiment is selected at TM
120the position that mode of resonance electric field is larger is inserted metallic screw and is realized perturbation, namely inserts the first metallic screw 3 at the trailing flank of dielectric resonator 2, as shown in Figure 5; Length (the TM of screw
120_ 1) determine the size of disturbance, and then affect this mode of resonance, the length of screw is longer, TM
120resonance frequency is less, and TM
210resonance frequency is almost constant, as shown in Figure 6; According to the symmetry of structure, if inserted in adjacent plane by metallic screw, the present embodiment inserts the second metallic screw 4 at the left surface of dielectric resonator 2, then can control TM
210the resonance frequency of pattern;
3) by place of accompanying each other in the Distribution of Magnetic Field of two modes of resonance, arrange closed becket 5, as shown in Figure 7, the area of closed becket 5 determines the size of coupled magnetic flux, thus the stiffness of coupling of control medium resonator 2 two modes of resonance; The height (inner-ring_h) of closed becket increases (area increase), TM
120pattern and TM
210the stiffness of coupling (i.e. coupling coefficient, couplingcoefficient) of pattern increases thereupon, as shown in Figure 8;
4) in order to realize end coupling, motivate first pattern, the method adopted here is becket coupling, i.e. magnetic coupling; Magnetic-coupled method, becket must perpendicular to the Distribution of Magnetic Field of the mode of resonance wanting to have encouraged, and becket can be annulus or straight-flanked ring, and the present embodiment is described with straight-flanked ring; As shown in Figure 9, between the first port and dielectric resonator 2, arrange the inner wire of termination first coaxial line 6 of the first becket 7, first becket 7, the other end is connected on the bottom surface of cavity 1, and the pattern that the first becket 7 encourages out is TM
120pattern, the area control end stiffness of coupling of the first becket 7, here External Q (quality factor) is used to embody, along with the increase of the first becket 7 area, here be presented as that the width (port_w) of the first becket 7 increases, External Q is along with reduction, as shown in Figure 10 (figure in figure eliminates the inner wire of the first coaxial line 6 and the thickness of the first becket 7), the area which illustrating the first becket 7 is larger, end coupling is stronger, and the pass band width that can realize is wider.
In like manner, in order to motivate second pattern, between the first port and dielectric resonator 2, arrange the inner wire of termination second coaxial line 8 of the second becket 9, second becket 9, the other end is connected on the bottom surface of cavity 1, and the pattern that the second becket 9 encourages out is TM
210pattern, the control of end stiffness of coupling is with the first becket 7.
5) above-mentioned 1) ~ 4) analysis under, the resonance frequency of mode of resonance can be controlled by metallic screw, the coupling coefficient of closed becket mode of resonance, utilize becket to be coupled simultaneously and control External Q, so the medium bimodule band-pass filter of the present embodiment can be designed, as shown in Figure 1.
Embodiment 2:
The present embodiment is based on the medium bimodule band-pass filter of two above-described embodiments 1, as Figure 11, (in figure, S represents source in utilization, L represents load end, 1 ~ 4 respectively intermediate scheme 1 ~ 4) shown in Fourth Order Linear topological structure, the two-chamber medium bimodule band-pass filter based on Rectangular Enclosure with Participating Media resonator can be designed, as shown in figure 12, wherein the coupled modes of pattern 2 and mode 3 are by closed becket implementation pattern coupling, the size (width inter-ring_w, height inter-ring_h) of closed becket controls the size of coupling coefficient, as shown in figure 13; S parameter based on the two-chamber medium bimodule band-pass filter of Rectangular Enclosure with Participating Media resonator responds as shown in figure 14, and as we can see from the figure, at bandwidth 2624MHz-2692MHz, passband return loss is below-15.6dB.
Embodiment 3:
The present embodiment is based on the medium bimodule band-pass filter of four above-described embodiments 1, as Figure 15, (in figure, S represents source in utilization, L represents load end, 1 ~ 8 respectively intermediate scheme 1 ~ 8) shown in eight rank linear topology structures, the four chamber medium bimodule band-pass filters based on Rectangular Enclosure with Participating Media resonator can be designed, as shown in figure 16, wherein pattern 2 and mode 3, pattern 4 and pattern 5, the coupled modes of pattern 6 and mode 7 are by closed becket implementation pattern coupling, the size of the size Control coupling coefficient of closed becket, S parameter based on four chamber medium bimodule band-pass filters of Rectangular Enclosure with Participating Media resonator responds as shown in figure 17, as we can see from the figure, at bandwidth 2634MHz-2691MHz, passband return loss is below-12.2dB.
Embodiment 4:
The main feature of the present embodiment is: described dielectric resonator is disc shape media resonator, and now rectangular cavities is of a size of 50mm*50mm*14.5mm, disc shape media resonator internal diameter 3.0mm, external diameter 14.0mm, height 14.5mm, medium relative dielectric constant is 38, is applicable to 1.5GHz frequency range.
Embodiment 5:
The present embodiment is based on the medium bimodule band-pass filter of two above-described embodiments 4, as Figure 18, (in figure, S represents source in utilization, L represents load end, 1 ~ 4 respectively intermediate scheme 1 ~ 4) shown in Fourth Order Linear topological structure, the horizontal model of the two-chamber medium bimodule band-pass filter based on disc shape media resonator can be designed, as illustrated in figures 19 and 20, wherein the coupled modes of pattern 2 and mode 3 are by closed becket implementation pattern coupling, the size of the size Control coupling coefficient of closed becket; S parameter based on the horizontal model of the two-chamber medium bimodule band-pass filter of disc shape media resonator responds as shown in figure 21, and as we can see from the figure, at bandwidth 1426MHz-1485MHz, passband return loss is below-10.0dB.
Embodiment 6:
Because horizontal model occupies larger horizontal space, in order to save space, the present embodiment is based on the medium bimodule band-pass filter of two above-described embodiments 4, utilize Fourth Order Linear topological structure similarly to Example 5, the vertical mould of the two-chamber medium bimodule band-pass filter based on disc shape media resonator can be designed, as shown in Figure 22 and Figure 23, wherein the coupling of pattern 2 and mode 3 be by window and a through cavities metal column form, the metal column run through is same with cavity constitutes a closed becket, the size (width ring_w) of closed becket controls the intensity of coupling, as shown in figure 24, S parameter based on the vertical mould of the two-chamber medium bimodule band-pass filter of disc shape media resonator responds as shown in figure 25, and as we can see from the figure, at bandwidth 1424MHz-1485MHz, passband return loss is below-16.6dB.
Embodiment 7:
The main feature of the present embodiment is: described dielectric resonator can also be cylindrical di resonator or the polygonal medium resonator except rectangle; Described cavity can also be cylindrical cavity or the polygon cavity except rectangle.
In sum, the utility model proposes to utilize the principle that metallic screw realizes FREQUENCY CONTROL, closed becket implementation pattern coupling controls innovatively, this technology has filled up the partial blank of current medium multi-mode filter technical research, and high degree reduces difficulty of processing and the processing cost of dielectric resonator; This Technology design is utilized to combine with planar topologies technology, design many moneys and possess high performance medium dual mode filter, above-described embodiment 2,3,5 and 6 gives the design ap-plication of Rectangular Enclosure with Participating Media resonator and disc shape media resonator, distinguish the design ap-plication band pass filters such as two-chamber, four chambeies, horizontal model, vertical mould, meet existing wireless communications systematic difference well.
The above; be only the utility model patent preferred embodiment; but the protection range of the utility model patent is not limited thereto; anyly be familiar with those skilled in the art in the scope disclosed in the utility model patent; be equal to according to the technical scheme of the utility model patent and utility model design thereof and replaced or change, all belonged to the protection range of the utility model patent.
Claims (6)
1. a novel medium bimodule band-pass filter, comprises cavity, it is characterized in that: a dielectric resonator is placed in the center of described cavity, and the upper/lower terminal of described dielectric resonator connects with cavity;
Insertion first metallic screw and the second metallic screw around described dielectric resonator, the cross central line of described first metallic screw is vertical with the cross central line of the second metallic screw, and described first metallic screw and the second metallic screw are used for the resonance frequency of control medium resonator two modes of resonance;
The Distribution of Magnetic Field place of accompanying each other of described dielectric resonator two modes of resonance is provided with closed becket, and described closed becket is used for the stiffness of coupling between control medium resonator two modes of resonance.
2. a kind of novel medium bimodule band-pass filter according to claim 1, is characterized in that:
Described cavity is provided with the first port on the position relative with the first metallic screw, described first port is provided with the first coaxial line, and be provided with the first becket between the first port and dielectric resonator, the inner wire of one termination first coaxial line of described first becket, the bottom surface of another termination cavity; Described first becket is for controlling the stiffness of coupling between the first port and the mode of resonance of excitation;
Described cavity is provided with the second port on the position relative with the second metallic screw, described second port is provided with the second coaxial line, and be provided with the second becket between the second port and dielectric resonator, the inner wire of one termination second coaxial line of described second becket, the bottom surface of another termination cavity; Described second becket is for controlling the stiffness of coupling between the second port and the mode of resonance of excitation.
3. a kind of novel medium bimodule band-pass filter according to claim 2, is characterized in that: described first becket and the second becket are annulus or straight-flanked ring.
4. a kind of novel medium bimodule band-pass filter according to claim 1 and 2, is characterized in that: described cavity is cylindrical cavity or polygon cavity.
5. a kind of novel medium bimodule band-pass filter according to claim 1 and 2, is characterized in that: described dielectric resonator is disc shape media resonator, cylindrical di resonator or polygonal medium resonator.
6. a kind of novel medium bimodule band-pass filter according to claim 5, is characterized in that: described polygonal medium resonator is Rectangular Enclosure with Participating Media resonator; When described dielectric resonator is Rectangular Enclosure with Participating Media resonator, described first metallic screw and the second metallic screw are inserted on two adjacent lateral surfaces of Rectangular Enclosure with Participating Media resonator respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521041543.4U CN205211898U (en) | 2015-12-14 | 2015-12-14 | Novel medium bimodulus band pass filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105390780A (en) * | 2015-12-14 | 2016-03-09 | 华南理工大学 | Novel dielectric dual-mode band-pass filter |
| CN111740194A (en) * | 2020-07-30 | 2020-10-02 | 江苏贝孚德通讯科技股份有限公司 | Small-sized medium double-mode filter without outer shell |
-
2015
- 2015-12-14 CN CN201521041543.4U patent/CN205211898U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105390780A (en) * | 2015-12-14 | 2016-03-09 | 华南理工大学 | Novel dielectric dual-mode band-pass filter |
| CN105390780B (en) * | 2015-12-14 | 2018-07-20 | 华南理工大学 | A kind of novel medium bimodule band-pass filter |
| CN111740194A (en) * | 2020-07-30 | 2020-10-02 | 江苏贝孚德通讯科技股份有限公司 | Small-sized medium double-mode filter without outer shell |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20160504 Termination date: 20181214 |