CN107579319B - Based on TM010Cubic 4G base station filter of dielectric resonant cavity - Google Patents
Based on TM010Cubic 4G base station filter of dielectric resonant cavity Download PDFInfo
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Abstract
The invention discloses a TM-based method010Cubic 4G base station filter of dielectric resonator, which can be realized by using multiple TM010The medium resonant cavity filters a signal input through an input tap of the filter; TM010Dielectric resonator and TE01The quality factor of the mode cylindrical dielectric resonant cavity can reach tens of thousands to meet the filtering requirement of the filter, but TM010The size and the volume of the medium resonant cavity are smaller, so that the volume of the filter is reduced, and the base station is miniaturized; multiple TM010The medium resonant cavities form a filter in a three-dimensional layout, and each resonant cavity can be coupled with more adjacent resonant cavities, so that the filtering performance is improved, the requirements of a 4G base station filter are met, and the shape of the base station filter is diversified.
Description
Technical Field
The invention relates to the field of radar communication, in particular to a communication method based on TM010Cubic 4G base station filter of dielectric resonator.
Background
With the continuous progress of technology in recent years, people have completely entered the era of mobile networks.
In recent years, with the increasing popularization of 4G technology, 4G base station filters are also widely used. Since the filter of the 4G base station has high requirements on out-of-band rejection and needs a high-Q resonant unit, that is, the resonant unit used for filtering has a high quality factor, and the number of the quality factors is usually tens of thousands, at the present stage, most of the resonant units used by the base station are TE01A mode cylindrical dielectric resonator, wherein TE01The dielectric cylinder in the mode cylindrical dielectric resonator needs to have a high dielectric constant.
Referring to FIG. 1, FIG. 2 and FIG. 3, FIG. 1 shows a TE in the prior art01A top view of a mode cylindrical dielectric resonant cavity; FIG. 2 shows TE in the prior art01A front view of a mode cylinder dielectric resonator; FIG. 3 shows TE in the prior art01The structural schematic diagram of the mode cylindrical medium resonant cavity.
In the prior art, the used resonant cavity is a TE mode resonant cavity, wherein the waveform of the propagated signal is a transverse electric wave, as shown in fig. 1, the electric field has no component along the wave propagation direction, but only has a component perpendicular to the wave propagation direction; as shown in fig. 2, the magnetic field has a component in the direction of propagation of the wave. As shown in FIG. 3, TE01The upper and lower ends of a dielectric column 1 in the mode cylindrical dielectric resonant cavity are in an open circuit state, namely the upper and lower ends of the dielectric column 1 are not in contact with TE01The upper and lower cavity walls of the cylindrical dielectric resonant cavity are mutually connectedAnd contacting, wherein a low dielectric constant material 2 is placed under the dielectric column 1 to pad up the dielectric column 1.
TE used in accordance with the prior art01The volume of a mode cylindrical dielectric resonator is usually large and several of said TEs are usually arranged in one base station filter01The mode cylindrical dielectric resonant cavities are mutually coupled to filter 4G signals, and the size of the whole filter is usually large at the moment, so that the miniaturization of a base station is not facilitated. Secondly, in the prior art, the dielectric resonator is usually selected to be a planar layout, which is not favorable for the shape diversification of the base station filter.
Disclosure of Invention
The invention aims to provide a TM-based method010The cubic 4G base station filter of the dielectric resonator can effectively reduce the volume of the filter.
To solve the above technical problems, the present invention provides a TM-based communication system010Cubic 4G base station filter of dielectric resonator, the filter comprising a plurality of TMs010Dielectric resonator, said TM010The medium resonant cavity comprises a hollow cylindrical cavity and a cylindrical medium column matched with the cavity, and the medium column is vertically arranged in the cavity and is mutually contacted with the upper cavity wall and the lower cavity wall of the cavity; a plurality of adjacent said TMs010An air window is arranged between the dielectric resonant cavities, and a plurality of TM010The medium resonant cavities are in three-dimensional layout; first said TM in the propagation direction of the electromagnetic wave010The dielectric resonant cavity is connected with a filter input tap, and the last TM010The medium resonant cavity is connected with a filter output tap.
Optionally, the filter comprises eight of the TMs010Dielectric resonator, eight said TMs010The medium resonant cavity is respectively provided with two TM in the transverse direction, the longitudinal direction and the height direction010A dielectric resonant cavity to form a cube-like structure; two TM arbitrarily adjacent in horizontal direction010The air window is arranged between the medium resonant cavities, and two adjacent TM in one group in the vertical direction010The medium resonant cavities are arranged betweenAn air window.
Optionally, the filter input tap and the filter output tap are respectively connected to any TM not provided with an air window in the vertical direction010Dielectric resonator, TM connected to input tap of said filter010Dielectric resonator and TM connected to output tap of said filter010The dielectric resonators are distributed along the body diagonal of the filter.
Optionally, the filter includes a flying bar, and the flying bar is connected to two TM's diagonally distributed in the horizontal direction by a clamp010A dielectric resonant cavity; wherein one end of the flying rod is connected with the same TM as the input tap of the filter010A dielectric resonator is provided.
Optionally, the filter comprises a coupling loop connecting two TM's diagonally distributed in the horizontal direction010A dielectric resonant cavity; wherein one end of the coupling loop is connected to the same TM as the filter output tap010A dielectric resonator is provided.
Optionally, tuning screws are respectively arranged on the upper surface and the lower surface of the dielectric column and the upper surface of the air window, and correspondingly, circular deep holes matched with the tuning screws are arranged on the upper surface and the lower surface of the dielectric column.
The invention provides a TM-based method010Cubic 4G base station filter of dielectric resonator, which can be realized by using multiple TM010The medium resonant cavity filters a signal input through an input tap of the filter; TM010Dielectric resonator and TE01The quality factor of the mode cylindrical dielectric resonant cavity can reach tens of thousands to meet the filtering requirement of the filter, but TM010The size and the volume of the medium resonant cavity are smaller, so that the volume of the filter is reduced, and the base station is miniaturized; multiple TM010The medium resonant cavities form a filter in a three-dimensional layout, and each resonant cavity can be coupled with more adjacent resonant cavities, so that the filtering performance is improved, the requirements of a 4G base station filter are met, and the shape of the base station filter is diversified.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 shows a prior art TE01A top view of a mode cylindrical dielectric resonant cavity;
FIG. 2 shows TE in the prior art01A front view of a mode cylinder dielectric resonator;
FIG. 3 shows TE in the prior art01The structural schematic diagram of the mode cylindrical dielectric resonant cavity;
FIG. 4 shows a filter TM according to an embodiment of the present invention010A top view of the dielectric resonator;
FIG. 5 shows a filter TM according to an embodiment of the present invention010A front view of the dielectric resonator;
FIG. 6 shows a filter TM according to an embodiment of the present invention010The structural schematic diagram of the medium resonant cavity;
fig. 7 is a topology structure diagram of a filter according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a filter according to an embodiment of the present invention;
fig. 9 is a diagram illustrating a result of an analysis of insertion loss and return loss of a filter according to an embodiment of the present invention;
fig. 10 is a diagram of a three-dimensional simulation result of insertion loss and return loss of a filter according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a TM-based010Cubic 4G base station filter of dielectric resonator. In the prior art, the 4G base station filter is usually passed through multiple TEs01The mode cylindrical dielectric resonant cavity filters the input signal due to TE01Mode cylindrical dielectric resonanceThe volume of the cavity is usually relatively large, which necessarily makes the overall filter relatively bulky; in the prior art, each resonant cavity in the filter is usually arranged in a plane, that is, each resonant cavity is distributed on the same plane, which inevitably causes the transverse area of the whole filter to be large, and the structure of the whole filter is not compact enough. For example, 8 of said TEs are provided in one filter01The cavity is a cylindrical medium cavity, and the cavity is distributed in a plane, so that the volume of the whole filter can reach 217mm × 74mm × 28mm, and the filter is not beneficial to miniaturization of a base station.
The invention provides a TM-based method010Cubic 4G base station filter of dielectric resonator, which can be realized by using multiple TM010The dielectric resonator 100 filters a signal input through a filter input tap 201; TM010 Dielectric resonator 100 and TE01The quality factor of the mode cylindrical dielectric resonant cavity can reach tens of thousands to meet the filtering requirement of the filter, but TM010The size and the volume of the dielectric resonant cavity 100 are smaller, which is beneficial to reducing the volume of a filter, thereby miniaturizing the base station; multiple TM010The dielectric resonators 100 are arranged in a three-dimensional manner to form a filter, so that each resonator has more adjacent resonators coupled thereto, thereby improving the filtering performance to meet the requirements of a 4G base station filter, and also diversifying the shape of the base station filter.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 4, fig. 5 and fig. 6, fig. 4 is a TM in filter according to an embodiment of the present invention010A top view of the dielectric resonator; FIG. 5 shows a filter TM according to an embodiment of the present invention010Dielectric resonanceA front view of the cavity; FIG. 6 shows a filter TM according to an embodiment of the present invention010The structure of the medium resonant cavity is shown schematically.
In an embodiment of the invention, the filter comprises a plurality of TMs010 Dielectric resonator 100, said TM010The medium resonant cavity 100 comprises a hollow cylindrical cavity 101 and a cylindrical medium column 102 matched with the cavity 101, wherein the medium column 102 is vertically arranged inside the cavity 101 and is in contact with the upper cavity wall and the lower cavity wall of the cavity 101.
Referring to FIGS. 4 and 5, in the present invention, the resonator used in the filter is TM010A dielectric resonator 100, which is a TM mode resonator, in which the waveform of the propagated signal is a transverse magnetic wave, as shown in fig. 4, the magnetic field has no component in the wave propagation direction, but only a component perpendicular to the wave propagation direction; as shown in FIG. 5, there is a component of the electric field along the propagation direction of the wave, and the electric field is mainly concentrated and distributed in the TM010Around the dielectric post 102 in the dielectric resonator 100.
In the embodiment of the present invention, TM is used010The dielectric resonator 100 is a cylindrical resonator in which TM is010Represents a transverse magnetic resonance mode, and 0 located at the first bit represents that the electromagnetic field is uniformly distributed in the circumferential direction; a 1 in the second place means that there is only one amplitude in the radial direction of the cylinder, and the amplitude is generally at the center of the media column 102; a 0 in the third position indicates that the electromagnetic field is uniformly distributed along the axial direction of the cylinder.
Since in the embodiment of the present invention, the fundamental mode of the resonant cavity is TM010The mode is very pure, the frequency interval between the mode and the adjacent higher mode is about 1GHz, and the interference caused by the higher mode can be effectively avoided.
Referring to FIG. 6, in the embodiment of the present invention, TM010The dielectric resonator 100 includes a hollow cylindrical cavity 101 and a cylindrical dielectric column 102 matching with the cavity 101, where the dielectric column 102 is made of a material with a high dielectric constant, and is usually made of a ceramic material with a high dielectric constant. The chamber 101 is usually made of a common metal materialAnd is made of metal material such as copper, iron, etc. The cavity 101 is generally a closed cavity, and has an upper wall, a lower wall and a side wall, the electromagnetic wave needs to be confined in the cavity 101, when the average electric energy of an electric field in the electromagnetic wave is equal to the average magnetic energy of a magnetic field, the electromagnetic wave resonates, and the frequency of the electromagnetic wave is the resonant frequency when the electromagnetic wave resonates, the resonant cavity filters by the resonance of the electromagnetic wave, and the frequency is the operating frequency of the filter.
The radius of the dielectric cylinder 102 is typically much smaller than the radius of the cavity 101 because of the space required in the resonant cavity to allow the electromagnetic waves to resonate. In the embodiment of the present invention, the medium column 102 is vertically disposed inside the cavity 101, and is in contact with the upper and lower cavity walls of the cavity 101, that is, the height of the medium column 102 needs to be equal to the height of the cavity 101; the media column 102 is typically centrally disposed within the lumen.
As shown in fig. 6, the middle of the dielectric column 102 is a hollow channel, and the purpose of the hollow channel is to provide a tuning screw 500, and the tuning screw 500 can adjust the resonant frequency of the resonant cavity. Of course, instead of providing a hollow channel, two corresponding grooves may be provided at the upper and lower ends of the dielectric cylinder 102 to mate with the tuning screw 500, i.e., the channel may be positioned with one hollow end at the upper and lower ends and a solid portion in the middle. Details regarding tuning screw 500 will be described in greater detail in subsequent sections.
The filter provided by the invention is applied to a 4G base station, the working frequency band of the filter is required to be 2570MHz to 2620MHz, the pass band insertion loss is required to be more than-0.7 dB, and the out-of-band rejection which is reduced by 40dB in 5M is required to be realized, and the TM is required to be010The Q of the dielectric resonator 100 is sufficiently large to be at least 12000. Therefore, in the present embodiment, the TM010The height of the cavity 101 of the dielectric resonator 100 is 15mm, and the radius of the cross section inside the cavity 101 is 15 mm; accordingly, the height of the dielectric pillar 102 disposed inside the inner cavity is also 15mm, the radius of the cross section of the dielectric pillar 102 is 4mm, the dielectric constant of the ceramic material used for the dielectric pillar 102 needs to be 35, and the loss is also lowThe tan delta was 0.0002. At this time TM010The resonant frequency of the dielectric resonant cavity 100 reaches 2585MHz, and the quality factor Q reaches 14000, thereby meeting the design requirements of the resonant cavity.
Because in the actual production process, it is usually impossible to precisely manufacture the TM meeting the above requirements010The radius and height of the dielectric resonant cavity 100, such as the cavity 101, and the radius and height of the dielectric column 102, cannot precisely meet the preset requirements, so a tuning screw 500 needs to be respectively arranged on the upper and lower surfaces of the dielectric column 102, and the resonant frequency of the entire resonant cavity is adjusted by the tuning screw 500, so as to compensate for engineering errors; accordingly, it is necessary to provide deep holes corresponding to the tuning screws 500 at the upper and lower ends of the dielectric cylinder 102, respectively, the deep holes are usually provided at the center of the end of the dielectric cylinder 102, the radius of the deep holes is usually 3mm, and the depth of the deep holes is usually 5 mm. If the deep holes arranged at the upper end and the lower end of the same medium column 102 are communicated to form a channel, the radius of the channel is 3 mm.
In an embodiment of the present invention, a plurality of adjacent said TMs010An air window is arranged between the dielectric resonant cavities 100, and a plurality of TM's are arranged010The dielectric resonant cavity 100 is in a three-dimensional layout; first said TM in the propagation direction of the electromagnetic wave010The dielectric resonator 100 is connected to a filter input tap 201, the last said TM010A filter output tap 202 is connected to the dielectric resonator 100.
The filter of the invention is connected with an external microwave system through the filter input tap 201 and the filter output tap 202, a signal required to be filtered is input through the filter input tap 201, and after the signal is filtered by the filter provided by the invention, the filtered signal is input to the external microwave system through the filter output tap 202.
Detailed description of the air Window and multiple TMs010The coupling between the dielectric resonators 100 will be described in detail in the following embodiments.
In an embodiment of the present invention, a plurality of said TMs010The dielectric resonator 100 is in a three-dimensional layout, compared with the prior artThe planar layout of the prior art can make the structure of the whole filter more compact, and also can diversify the shape of the base station filter. The specific three-dimensional layout of the filter will be described in detail in the following embodiments.
The invention provides a TM-based method010Cubic 4G base station filter of dielectric resonator, which can be realized by using multiple TM010The dielectric resonator 100 filters a signal input through a filter input tap 201; TM010 Dielectric resonator 100 and TE01The quality factor of the mode cylindrical dielectric resonant cavity can reach tens of thousands to meet the filtering requirement of the filter, but TM010The size and the volume of the medium resonant cavity are smaller, so that the volume of the filter is reduced, and the base station is miniaturized; multiple TM010The medium resonant cavities form a filter in a three-dimensional layout, and each resonant cavity can be coupled with more adjacent resonant cavities, so that the filtering performance is improved, the requirements of a 4G base station filter are met, and the shape of the base station filter is diversified.
Please refer to fig. 7, fig. 8, fig. 9 and fig. 10; fig. 7 is a topology structure diagram of a filter according to an embodiment of the present invention; fig. 8 is a schematic structural diagram of a filter according to an embodiment of the present invention; fig. 9 is a diagram illustrating a result of an analysis of insertion loss and return loss of a filter according to an embodiment of the present invention; fig. 10 is a diagram of a three-dimensional simulation result of insertion loss and return loss of a filter according to an embodiment of the present invention.
In the embodiment of the invention, the filter provided by the invention comprises eight TM010Dielectric resonator 100, eight of said TM010The dielectric resonator 100 is provided with two TM in the transverse direction, the longitudinal direction and the height direction010A dielectric resonator 100 to form a cuboidal structure. I.e., eight TMs in the present embodiment010The dielectric resonator 100 is laid out in two layers to form a cube-like structure of 2 × 2 × 2.
As shown in FIG. 7, wherein 1 to 8 represent TM from No. 1 in the embodiment of the present invention, respectively010Dielectric resonator to No. 8TM0108 resonant cavities of the dielectric resonant cavity; s represents the filter input tap 201; l represents the filter output tap 202.
In the embodiment of the invention, two TMs which are arbitrarily adjacent in the horizontal direction010An air window is arranged between the dielectric resonant cavities 100, and a group of two adjacent TM in the vertical direction010An air window is provided between the dielectric resonators 100. The air window is a section of hollow channel and is connected with two TM (transverse magnetic) modules which are adjacent to each other in the horizontal direction010 Dielectric resonator 100, equivalent to TM010A window is formed on the side wall of the dielectric resonator 100, and the space between the two resonators is connected through the air window, so that the electromagnetic waves distributed in the two resonators can be coupled through the air window.
Since in the working state, TM010The electromagnetic waves in the dielectric resonator 100 are transverse magnetic waves, so in an embodiment of the present invention, two adjacent TMs010The transmission between the dielectric resonant cavities 100 is performed by means of magnetic coupling.
In an embodiment of the invention, adjacent TMs disposed in the same layer010The dielectric resonators 100 are magnetically coupled through an air window and there will be a pair of adjacent TM's above and below010Since the dielectric resonators 100 are magnetically coupled to each other through the air window in a manner equivalent to inductive coupling, in the topology of fig. 7, TM010 dielectric resonators 100 are connected to each other through an inductor, and TM dielectric resonators 100 are connected to each other through an inductor010The air windows are provided between the dielectric resonators 100 for magnetic coupling.
As shown in FIG. 8, since the filter input tap 201 is set at No. 1 TM010The filter output tap 202 is set at # 8 TM in the dielectric resonator010 Filter input tap 201 and # 1 TM in dielectric resonator010Between dielectric resonators, and filter output taps 202 and # 8 TM010The transmission between the dielectric resonators is performed by magnetic coupling, so in FIG. 7, the filter input tap 201 is connected with No. 1 TM by inductance010A dielectric resonant cavity is arranged on the substrate,and connecting the filter output tap 202 with # 8 TM via an inductor010A dielectric resonator is provided.
In the embodiment of the present invention, the filter input tap 201 and the filter output tap 202 are respectively connected to any TM not provided with an air window in the vertical direction010 Dielectric resonator 100, TM connected to input tap 201 of said filter010Dielectric resonator 100 and TM connected to the filter output tap 202010The dielectric resonators 100 are distributed along the body diagonal of the filter. That is, in FIG. 7, there is only TM # 5 in the vertical direction010Dielectric resonator and # 4 TM010The medium resonant cavities are mutually connected through inductors, and an input tap S of the filter is connected with No. 1 TM010The output tap L of the dielectric resonator and the filter is connected with the No. 8 TM010A dielectric resonator is provided.
In the embodiment of the invention, the filter comprises a flying bar 300, and the flying bar 300 is connected with two TM's which are distributed diagonally in the horizontal direction through a clamp010A dielectric resonant cavity 100; wherein one end of the flying bar 300 is connected to the same TM as the filter input tap 201010A dielectric resonator 100.
Due to the flying bar 300 and the two TMs010The dielectric resonator 100 is not in direct contact, but is isolated by the clamp, so the flybar 300 is in contact with both TM' s010The transmission of signals between the dielectric resonators 100 is by way of electrical coupling, which corresponds to capacitive coupling, so in FIG. 7, the number 1 TM010Dielectric resonator and # 3 TM010The dielectric resonant cavities are connected with each other through capacitors.
The clamp is typically a Teflon clamp, and the Teflon material has a dielectric constant of typically 2.1, which is effective for coupling the fly rod 300 to the TM010The dielectric resonator 100 is isolated to isolate the fly rod 300 from the TM010The dielectric resonator 100 becomes electrically coupled and ultimately forms a capacitor. After the fly rod 300 is added, two zeros may be generated in the low frequency band of the pass band.
In the embodiment of the present invention, the filter includes a coupling loop 400, and the coupling loop 400 is connected toTwo TMs diagonally distributed in horizontal direction010A dielectric resonant cavity 100; wherein one end of the coupling loop 400 is connected to the same TM as the filter output tap 202010A dielectric resonator 100.
Due to the coupling ring 400 and the two TMs010There is direct contact between the dielectric resonator 100, so the coupling ring 400 is in contact with both TMs010The transmission of signals between the dielectric resonators 100 is performed by magnetic coupling, which corresponds to inductive coupling, so that in fig. 7, No. 6 TM010Dielectric resonator and No. 8 TM010The medium resonant cavities are connected with each other through inductors.
At No. 6 TM010Dielectric resonator and No. 8 TM010 A coupling ring 400 is added between the medium resonant cavities, the coupling ring 400 is directly contacted with the metal wall of the cavity body and forms a closed circular ring with the metal wall, and non-adjacent TM can be enhanced010The inductive coupling between the dielectric resonators 100, in turn, may create two transmission zeroes in the high frequency band of the pass band.
By the flying bar 300 and the coupling ring 400, a sufficiently large out-of-band rejection can be obtained, so that the requirement of the filter in the embodiment of the invention is met, and the out-of-band rejection reduced by 40dB in 5M is realized.
Further, in the embodiment of the present invention, a tuning screw 500 may be provided on an upper surface of each air window, and the TM may be adjusted by the tuning screw 500 provided on the air window010The coefficient of coupling between the dielectric resonators 100.
In the embodiment of the invention, the filter is provided with 8 TMs in total010 Dielectric resonator 100, 8 of said TM010The dielectric resonators 100 are arranged in a cube-like configuration of 2 × 2 × 2, each TM010The radius of the inside of the cavity 101 of the dielectric resonator 100 is 15mm, the height is 15mm, the wall thickness of the cavity 101 of the resonator is 4mm to 5mm, the appearance size of the finally formed filter is 74mm × 74mm × 40mm, and compared with the filter with the volume of 217mm × 74mm × 28mm in the prior art, the volume of the filter provided by the embodiment of the invention is smaller than that of the filter provided by the prior artHalf of the volume. In addition, in the embodiment of the invention, only one flying bar 300 and one coupling ring 400 are provided, which is very convenient for the processing and manufacturing of the filter.
Referring to fig. 9 and 10, fig. 9 and 10 show a TM provided by an embodiment of the present invention010The working frequency of the cubic 4G base station filter of the dielectric resonant cavity is 2570MHz to 2620MHz (+ -0.5 MHz), and the working frequency is in a 4G communication frequency band; the return loss is less than-20 dB, the insertion loss is more than-1 dB, the out-of-band rejection is less than-40 dB at 2500 MHz-2565 MHz and 2625 MHz-2695 MHz, and the out-of-band rejection is less than 60dB at 1880 MHz-1920 MHz (mobile 3G communication frequency band).
The embodiment of the invention provides a TM-based device010The cubic 4G base station filter of the medium resonant cavity adopts a three-dimensional layout mode among a plurality of resonant cavities, so that the structure of the whole filter is more compact, and the shape of the base station filter is diversified. The filter has excellent performance in the aspects of return loss, insertion loss and out-of-band rejection, and can completely meet the requirements of a 4G base station filter.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The TM-based system provided by the invention010The cubic 4G base station filter of the dielectric resonator is described in detail. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (3)
1. Based on TM010A cubic 4G base station filter for a dielectric resonator, said filter comprising a plurality of TMs010Dielectric resonator, said TM010The medium resonant cavity comprises a hollow cylindrical cavity and a cylindrical medium column matched with the cavity, and the medium column is vertically arranged in the cavity and is mutually contacted with the upper cavity wall and the lower cavity wall of the cavity; a plurality of adjacent said TMs010An air window is arranged between the dielectric resonant cavities, and a plurality of TM010The medium resonant cavities are in three-dimensional layout; first said TM in the propagation direction of the electromagnetic wave010The dielectric resonant cavity is connected with a filter input tap, and the last TM010The medium resonant cavity is connected with a filter output tap;
the filter input tap and the filter output tap are respectively connected with any TM which is not provided with an air window in the vertical direction010Dielectric resonator, TM connected to input tap of said filter010Dielectric resonator and TM connected to output tap of said filter010The dielectric resonant cavities are distributed along the diagonal line of the filter body;
the filter comprises a flying rod, and the flying rod is connected with two TMs which are distributed in a diagonal manner in the horizontal direction through a clamp010A dielectric resonant cavity; wherein one end of the flying rod is connected with the same TM as the input tap of the filter010A dielectric resonant cavity;
the filter comprises a coupling ring connected with two TMs diagonally distributed in horizontal direction010A dielectric resonant cavity; wherein one end of the coupling loop is connected to the same TM as the filter output tap010A dielectric resonant cavity;
a plurality of said TMs010The medium resonant cavity forms a cube-like structure; the air window is a section of hollow channel; the coupling ring and the TM010The metal wall of the dielectric resonant cavity is in direct contact with the metal wall to form a closed circular ring.
2. The filter according to claim 1, wherein the filter is a linear filter,wherein said filter comprises eight of said TMs010Dielectric resonator, eight said TMs010The medium resonant cavity is respectively provided with two TM in the transverse direction, the longitudinal direction and the height direction010A dielectric resonant cavity to form a cube-like structure; two TM arbitrarily adjacent in horizontal direction010The air window is arranged between the medium resonant cavities, and two adjacent TM in one group in the vertical direction010The air window is arranged between the medium resonant cavities.
3. The filter according to claim 1 or 2, wherein the upper and lower surfaces of the dielectric cylinder and the upper surface of the air window are provided with tuning screws, and correspondingly, the upper and lower surfaces of the dielectric cylinder are provided with circular deep holes matched with the tuning screws.
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| CN201710795938.0A CN107579319B (en) | 2017-09-06 | 2017-09-06 | Based on TM010Cubic 4G base station filter of dielectric resonant cavity |
| PCT/CN2017/114946 WO2019047403A1 (en) | 2017-09-06 | 2017-12-07 | Cubic 4g base station filter based on tm010 medium resonance cavities |
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| CN201710795938.0A CN107579319B (en) | 2017-09-06 | 2017-09-06 | Based on TM010Cubic 4G base station filter of dielectric resonant cavity |
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| CN102324599B (en) * | 2011-05-27 | 2014-02-26 | 华南理工大学 | Balanced type radio frequency voltage tunable bandpass filter with constant absolute bandwidth |
| CN102509826A (en) * | 2011-11-17 | 2012-06-20 | 摩比天线技术（深圳）有限公司 | TM mode dielectric filter |
| WO2014024349A1 (en) * | 2012-08-09 | 2014-02-13 | 日本特殊陶業株式会社 | Tm010 mode dielectric resonator, resonator element, and dielectric filter |
| CN103151581B (en) * | 2012-11-30 | 2016-03-30 | 摩比天线技术（深圳）有限公司 | TM mould dielectric filter |
| CN207149673U (en) * | 2017-09-06 | 2018-03-27 | 广东工业大学 | One kind is based on TM010The cube 4G base station filters of dielectric resonant chamber |
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2017
- 2017-09-06 CN CN201710795938.0A patent/CN107579319B/en active Active
- 2017-12-07 WO PCT/CN2017/114946 patent/WO2019047403A1/en active Application Filing
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| CN102544649A (en) * | 2012-01-04 | 2012-07-04 | 西安电子科技大学 | One-cavity three-mode filter |
| CN103855448A (en) * | 2012-12-03 | 2014-06-11 | 武汉凡谷电子技术股份有限公司 | TM mode dielectric filter |
| CN205921061U (en) * | 2016-07-08 | 2017-02-01 | 京信通信技术(广州)有限公司 | Dielectric filter |
| CN205944361U (en) * | 2016-07-08 | 2017-02-08 | 广东通宇通讯股份有限公司 | TM mould bi -polar short circuit wave filter |
| CN106654476A (en) * | 2017-01-12 | 2017-05-10 | 华南理工大学 | Novel four-mode dielectric band-pass filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107579319A (en) | 2018-01-12 |
| WO2019047403A1 (en) | 2019-03-14 |
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