CN214848975U - Dielectric filter containing mixed dielectric resonator - Google Patents

Abstract

The utility model discloses a dielectric filter who contains mixed dielectric resonator has solved the big problem that changes with main resonant frequency is difficult for of dielectric filter insertion loss. The dielectric filter body is provided with a dielectric block, a coupling hole and a coupling dielectric block, and the dielectric block and the surrounding space form a mixed dielectric resonant cavity; the dielectric blocks or single-layer or multi-layer in the mixed dielectric resonant cavity have different dielectric constants and are combined in any geometric structure; the coupling hole and the coupling medium block are positioned between the two mixed medium resonant cavities; the outer surface of the dielectric filter is either a hard metal coating film or an arbitrary metal plating film. The utility model discloses need high-quality filtering in can being used for the communication. The dielectric resonators may have a combination of two or more different dielectric constants in various geometrical configurations. The utility model discloses can control main resonant frequency in a flexible way, improve the no-load quality factor of medium resonant cavity, reduce the cavity loss. The frequency selection of the transmitting and receiving signals is realized by the communication of a base station or a satellite.

Description

Dielectric filter containing mixed dielectric resonator

Technical Field

The utility model belongs to the technical field of mobile communication, satellite communication, radar communication equipment subassembly, in particular to dielectric filter among the radio frequency microwave receiving and dispatching system specifically is a dielectric filter who contains mixed dielectric resonator, can be used to in the receiving and dispatching passageway of wireless communication and radar system radio frequency front end.

Background

In recent years, with the rapid development of wireless technologies such as a new-generation mobile communication, a satellite communication, an internet of things, and a new-generation integrated radar system, the overall communication device is rapidly developed in the direction of miniaturization, high density, low cost, high performance, low delay, and low power consumption, and with the wide application of a large-scale MIMO technology, the microwave filter in the wireless communication system is also developed in the direction of miniaturization, high performance, and low cost. The dielectric filter can be filled with materials with high dielectric constants, so that the size of the whole filter can be miniaturized, and the dielectric filter is suitable for mass production by means of a mature process line, so that the cost is lower compared with other filter forms. Under the large background of the new generation communication system, the dielectric filter with the advantages of low cost and miniaturization has wider application prospect.

Although there have been many efforts in the development of dielectric filters, one industry pain point problem that is currently important is: dielectric filters have poor insertion loss relative to conventional metal cavity filters. The high insertion loss affects the system noise figure of the receiver, while for the transmitter, the power of the power amplifier is attenuated to the filter, thereby affecting the transmission power and energy consumption of the transmitter. The large insertion loss of the dielectric filter causes high overall power consumption of a base station, a satellite, a radar and other systems applying the dielectric filter, and the large-area use of a new generation of base station, a satellite and an integrated radar is greatly influenced.

Disclosure of Invention

The utility model discloses to above-mentioned prior art not enough, provided a high order mode and adjustable and the low dielectric filter who contains mixed dielectric resonator of loss of main resonant frequency.

The utility model relates to a dielectric filter who contains mixed medium syntonizer, include medium body, resonant cavity, coupling window, outside metallic conduction layer and through the input, output joint that the resonant cavity was drawn forth in the body, the body surface is the metallic conduction layer, be provided with at least three resonant cavity on the body, connect through the coupling window between two liang of resonant cavities, in normal work, there is electromagnetic field distribution in the resonant cavity, its characterized in that, still be provided with medium piece, coupling hole and coupling medium piece on the body, constitute mixed medium resonant cavity by medium piece and the body space around self place jointly, medium piece and body are two kinds of different media; in the dielectric filter body, the dielectric block in the mixed dielectric resonant cavity is in a single-layer or multi-layer combination mode, wherein the structure of the multi-layer combined dielectric block is the combination of two or more media with different dielectric constants; the coupling hole and the coupling medium block are positioned between the two mixed medium resonant cavities and are in negative coupling, so that the filter response with or without cross coupling is realized; the metal conducting layer outside the mixed dielectric filter is a hard metal coating film or any metal plating film.

The utility model discloses still a dielectric filter's that contains mixed dielectric resonator usage, its characterized in that for among the receiving and dispatching passageway among the communication system, connect in the receiving and dispatching passageway radio frequency front end filter circuit among the communication system, realize the selection of receiving and dispatching signal frequency.

The utility model provides a can control main resonant frequency and higher mode in a flexible way, improve dielectric resonator's no load quality factor, reduce the loss of cavity.

Compared with the prior art, the utility model has the technical advantages that:

the dielectric filter is composed of mixed dielectric resonators with two or more than two media: the mixed dielectric resonator is composed of a dielectric block and a peripheral body space, the dielectric block is in a single layer or multiple layers, and the dielectric block and the peripheral body are in a wrapping state or a laminated state; in the two media, one of the media can be in the shape of a cylinder, a cuboid, a cube, an ellipsoid, a boss, a double boss and an abnormity, the other media wraps the media in the other media, and the media can also be in the shape of a cylinder, a cuboid, a cube, an ellipsoid and an abnormity.

The unloaded quality factor of the dielectric resonator is improved: the two dielectric constants are usually different by more than multiple times, so that an electromagnetic field is bound in a medium with a high dielectric constant, the no-load quality factor of the dielectric resonator is effectively improved, the loss of the cavity is reduced, and the low-loss performance of the filter is realized.

Can control main resonant frequency and higher order mode in a flexible way: the filter of the mixed dielectric resonator adopts a plurality of mixed dielectric resonant cavities which are mutually connected, and the debugging blind hole is arranged above the mixed dielectric resonant cavities, so that the main resonant frequency and the higher order mode can be flexibly controlled.

The utility model discloses a dielectric filter has adopted a plurality of interconnect's novel dielectric waveguide resonant cavity, in the dielectric filter design, one of the advantages of the utility model is that control main resonant frequency and higher mode that can be nimble, and the second is the no-load quality factor who improves the dielectric resonator, reduces the loss of cavity to improve dielectric waveguide filter's performance. The dielectric filter can realize low-loss performance, has the characteristics of low cost, high reliability and the like, and can be used in a modern communication system.

Drawings

Fig. 1 is a side view of a three-layer dielectric resonator provided by the present invention;

fig. 2 is a side view of a dielectric resonator composed of two dielectrics with different dielectric constants according to the present invention;

FIG. 3 is a top view of the dielectric resonator of FIG. 2;

fig. 4 is a cross-sectional view of the dielectric resonator AA' of fig. 2 and 3, as seen in cross-section;

fig. 5 is a perspective view of a dielectric resonator with tuned blind holes, which is composed of two dielectrics with different dielectric constants;

FIG. 6 is a top view of the dielectric resonator of FIG. 5;

fig. 7 is a cross-sectional view of the dielectric resonator AA' of fig. 5 and 6;

fig. 8 is a side view of a dielectric resonator with tuned blind holes and loading made of two dielectrics with different dielectric constants according to the present invention;

FIG. 9 is a top view of the dielectric resonator of FIG. 8;

fig. 10 is a cross-sectional view of the dielectric resonator AA' of fig. 8 and 9;

fig. 11 is a schematic structural diagram of the present invention, and is a perspective view of a low-loss sixth-order dielectric filter provided by the present invention;

fig. 12 is a frequency response curve of a low-loss sixth-order dielectric filter according to the present invention;

fig. 13 is a perspective view of a low loss, band tuned and loaded sixth order dielectric filter according to the present invention;

fig. 14 is a frequency response curve of a low loss, band tuned and loaded sixth order dielectric filter according to the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Example 1

With the rapid development of wireless technologies such as a new-generation mobile communication technology, a satellite communication technology, an internet of things technology, a new-generation integrated radar system technology and the like, the overall communication equipment is rapidly developed in the direction of miniaturization, high density, low cost, high performance, low delay and low power consumption. The dielectric filter is beneficial to realizing miniaturization because the inside of the dielectric filter is filled with the medium with higher dielectric constant; meanwhile, the process production flow is mature, and low cost can be realized. The dielectric filter is in line with the development trend of the current communication system, and has a large amount of engineering application requirements. However, the existing dielectric filter has a large insertion loss problem, which causes high overall power consumption of systems such as base stations, satellites and radars in use, and this greatly affects the large-area use of new generation base stations, satellites and integrated radars. To above problem, the utility model discloses through research provide a dielectric filter who contains mixed dielectric resonator.

The utility model relates to a medium filter with mixed medium resonator, referring to fig. 11, the medium filter with mixed medium resonator of the utility model comprises a medium body, resonant cavities, coupling windows, an external metal conductive layer, an input 7 and an output joint 8 which are led out through the resonant cavity in the body, the outer surface of the body is the metal conductive layer, at least three resonant cavities are arranged on the body 6, in the prior art, three resonant cavities are the resonant cavities of a medium, two resonant cavities are connected through the coupling windows 3, in normal work, electromagnetic field distribution exists in the resonant cavities, five coupling windows in fig. 11, the coupling windows 3-12 are positioned between the resonant cavities of the medium block 2-1 and the medium block 2-2, the coupling windows 3-23 are positioned between the resonant cavities of the medium block 2-2 and the medium block 2-3, the coupling window 3-34 is located between the resonant cavities of the dielectric blocks 2-3 and 2-4, the coupling window 3-56 is located between the resonant cavities of the dielectric blocks 2-5 and 2-6, the coupling window 3-36 is located between the resonant cavities of the dielectric blocks 2-3 and 2-6, the coupling window is a coupling window for connecting two resonators when the dielectric filter works, namely under the electromagnetic field distribution environment, the utility model discloses in also be the medium part of connecting the mixed medium resonant cavity. Fig. 11 is the structural schematic diagram of the utility model discloses a also is the utility model provides a pair of six rank dielectric filter perspectives of low-loss, the utility model discloses a dielectric filter who contains mixed dielectric resonator still is provided with dielectric block 2, coupling hole 4 and coupling dielectric block 5 on body 6, the utility model discloses in constitute mixed dielectric resonator jointly by dielectric block 2 and the dielectric body space 1 around self place, this is equal to mixed dielectric resonator, and dielectric block 2 and body space 1 are the medium of two kinds of differences. In a magnetic field environment, each dielectric block has its own body space 1 around it.

Referring again to fig. 13, when the dielectric block is a single dielectric, the dielectric block 2 and the body 6 are also two different dielectrics. In the dielectric filter body, the dielectric block 2 in the mixed dielectric resonant cavity is either single-layer or multi-layer. Referring again to fig. 2 and 1, where the dielectric block 2 of fig. 2 is a single layer, the dielectric block 2 and the surrounding bulk space 1 constitute a resonant cavity. The dielectric block 2 in fig. 1 is a multilayer, the dielectric block in fig. 1 is composed of two dielectrics with different dielectric constants, wherein the middle layer 2.2 is one dielectric, and the top layer 2.1 and the bottom layer 2.1 are both the other dielectric. The utility model discloses the medium block structure of multilayer combination is two kinds or the different medium of more than two kinds of dielectric constant among the well mixed medium resonant cavity.

Referring to fig. 11, the utility model provides a coupling hole 4 is located between two mixed medium resonant cavities with coupling medium piece 5, coupling medium piece or the bottom that is located the coupling hole or parallel with 4 vertical center lines of coupling hole, be platform form when two coupling medium pieces one, another is for erectting the installation, 5-1 tops of platform form coupling medium piece are equipped with coupling hole 4, and above-mentioned two coupling medium pieces all are in between two mixed medium chambeies, erect the vertical center line of laying 5-2 coupling medium pieces and platform form coupling medium piece and be parallel to each other. When coupling dielectric blocks are present at both locations, stronger negative coupling can be generated, and filter responses with or without cross-coupling can be achieved. The utility model discloses in the outside metal conducting layer of dielectric filter by mixing the medium resonant cavity and constitute or for having hardness metal coating film or for arbitrary metal plating film, choose for use arbitrary conductive metal all can be used to the utility model discloses. The conductive hard metal coating mainly prevents deformation and damage in an environment which is easy to be extruded and collided, and the metal coating mainly comprises aluminum, silver, gold and the like.

The utility model has the advantages that the insertion loss is large and the main resonance frequency is not easy to change in the prior art, the utility model has the conception that the loss of the cavity is reduced and the insertion loss of the dielectric filter can be reduced by improving the no-load quality factor of the dielectric resonator; in the concrete implementation, the filter of the mixed medium resonator adopts a plurality of mixed medium resonant cavities which are mutually connected, and the mixed medium resonant cavities are two or more than two media with different dielectric constants. By changing the dielectric constant ratio of the medium, the no-load quality factor of the medium resonator can be improved, and the main resonant frequency and the higher-order mode of the resonator can be flexibly controlled.

Example 2

The whole that contains the dielectric filter who mixes the dielectric resonator constitutes with embodiment 1, the utility model discloses all resonant cavities at the body, including non-mixed medium resonant cavity and mixed medium resonant cavity top all can be through setting up the debugging blind hole, change the resonant frequency of syntonizer.

In this embodiment, in order to illustrate clearly the utility model discloses the structure of the dielectric resonator that two kinds of different medium are constituteed, can refer to fig. 5, fig. 5 does the utility model discloses in provide a constitute by the medium of two kinds of different dielectric constants, the perspective view of the dielectric resonator of area tuning blind hole, this syntonizer is by the dielectric block 2 for the cylinder, debugging blind hole 3 and the peripheral cuboid space medium 1 of dielectric block 2 that the top set up constitute, body space 1 is the different medium of two kinds of dielectric constants around dielectric block 2 and the dielectric block 2, make the dielectric constant of body space 1 be higher than dielectric block 2 around the dielectric block 2 usually, the surface of the whole dielectric resonator of formation is exactly that to wrap up by metal level coating film on the body. Because the dielectric constant of body space 1 is higher around dielectric block 2, the electromagnetic field ties in body space 1 around dielectric block 2 more for whole dielectric resonator's loss is less, also consequently the utility model discloses the loss has been reduced from the device structure. The utility model discloses set up the resonant frequency that the 3 degree of depth of debugging blind hole can control the resonant cavity in a flexible way.

The utility model discloses well coupling hole is located between two mixed medium chambeies with the coupling medium piece, and the setting of coupling medium piece can be more than one, when the coupling medium piece of two different shapes, also should be located in the middle of two adjacent mixed medium chambeies. When two coupling dielectric blocks are arranged vertically, one coupling dielectric block is in a platform shape, a coupling hole is formed above the platform-shaped coupling dielectric block, the two coupling dielectric blocks are positioned between the two mixed dielectric cavities, and the vertical center lines of the structures are parallel to each other, stronger negative coupling can be generated, and filter response with or without cross coupling is realized.

Referring to fig. 13, fig. 13 is a perspective view of a low-loss, tuned and loaded sixth-order dielectric filter, in order to implement negative coupling, in addition to six resonant cavities, five inductive couplings formed by coupling windows, and six blind tuning holes, two coupling dielectric blocks of different shapes are disposed between two mixed dielectric cavities in the solution of fig. 13, the coupling dielectric block 5-1 is platform-shaped, or square, cylindrical, etc., in this example, it is circular platform-shaped, the coupling dielectric block 5-2 is a cuboid vertically installed, a coupling hole 4 is disposed above the platform-shaped coupling dielectric block 5-1, the coupling hole 4 and two coupling dielectric blocks 5-1, 5-2, together implement negative coupling between the resonant cavities 2-5 and 2-6, the coupling dielectric block 5-2 is added on the left side of the coupling hole 4, the negative coupling is enhanced, so that the dielectric filter realizes two transmission zeros, the filter response with cross coupling is realized, and the selectivity of the dielectric filter is improved.

Example 3

The overall structure of the dielectric filter including the hybrid dielectric resonator is the same as that of embodiments 1-2, the dielectric block in the hybrid dielectric resonator of the present invention is composed of two or more media with different dielectric constants, and the two media of the present invention are combined or in a wrapped state, as shown in fig. 2; or in a stacked state, see fig. 1.

In this embodiment, the parcel state of medium combination refers to fig. 2, fig. 2 is the utility model provides a pair of dielectric resonator's that medium composition by two kinds of different dielectric constants side view, this syntonizer is by the medium piece 2 for the cylinder, debugging blind hole 3 and the peripheral cuboid space 1 of medium piece 2 that the top set up constitute, the peripheral cuboid space 1 of medium piece 2 and medium piece 2 are the different medium of two kinds of dielectric constants, the dielectric constant that makes 2 peripheral cuboid spaces 1 of medium piece is higher than medium piece 2 usually, whole dielectric resonator is wrapped up by metal level coating film, because the dielectric constant of 2 peripheral cuboid spaces 1 of medium piece is higher, the electromagnetic field is retrained in 2 peripheral cuboid spaces 1 of medium piece more, make whole dielectric resonator's loss less. The stromatolite state can be seen in fig. 1, fig. 1 is a pair of the utility model provides a three-layer dielectric resonator's side view, dielectric resonator has three-layer medium 2.1,2.2,2.1 constitutes, middle dielectric layer 2.2 is covered by two-layer medium 2.1, the dielectric constant of two kinds of media is different, make medium 2.2's dielectric constant be higher than medium 2.1 usually, the surface of the dielectric filter who comprises mixed medium resonant cavity is the metallic coating parcel, because medium 2.2's dielectric constant is higher, the electromagnetic field ties in medium 2.2 more, the utility model discloses the loss of having guaranteed whole dielectric resonator is less from structural.

Example 4

The dielectric filter with the mixed dielectric resonator is the same as the dielectric filter of the embodiments 1 to 3, and the wrapped state in different dielectric combinations of the invention is concentric wrapping, or the inner dielectric is at any position in the outer dielectric. In the two media, one of the media can be in the shape of a cylinder, a cuboid, a cube, an ellipsoid, a boss, a double boss and an abnormity, the other media can be in the same shape or wrapped in other shapes to wrap the media, and the shape of the media resonator can also be in the shape of a cylinder, a cuboid, a cube, an ellipsoid and an abnormity along with the shape of the wrapped media, which is shown in fig. 2. The shape of the dielectric resonator itself may not follow the shape of the encased dielectric.

In this embodiment, refer to fig. 2, fig. 2 is the utility model provides a pair of dielectric resonator's that medium by two kinds of different dielectric constants constitutes side view, dielectric resonator in fig. 2 is by the dielectric resonator who constitutes jointly for the dielectric block 2 of cylinder and the peripheral cuboid space 1 of dielectric block 2, the peripheral cuboid space 1 of dielectric block 2 and dielectric block 2 are the different medium of two kinds of dielectric constants, it is higher than dielectric block 2 to make the dielectric constant of the peripheral cuboid space 1 of dielectric block 2 usually, the surface of the dielectric filter who comprises mixed dielectric resonator is the metallic coating parcel, because the dielectric constant of the peripheral cuboid space 1 of dielectric block 2 is higher, the electromagnetic field is restrainted in the peripheral cuboid space 1 of dielectric block 2 more, make whole dielectric resonator's loss less.

The shape of the package between the media of the present invention can be combined in various ways, and only one example is given here for illustration, and no other combinations are listed.

Example 5

The dielectric filter including the hybrid dielectric resonator is, as in embodiments 1 to 4, of the present invention, a laminated state in different dielectric combinations, or an upper-lower layer structure, or a left-right layer structure, or a front-rear layer structure. The utility model discloses an among two kinds of media, wherein if the shape of a medium is for the cuboid that has the boss, then the shape of another kind of medium just should be for the cuboid that has the shrinkage pool, and two kinds of medium cooperation splices together, forms the stromatolite state. The laminated state is a laminated structure with interpenetration, the specific lug boss and the concave hole can be in the shapes of a cylinder, a cuboid, a cube, an ellipsoid and a special shape, and the interpenetration laminated structure can enable the dielectric resonator to be more stable.

In this embodiment, referring to fig. 1, fig. 1 is a side view of a three-layer dielectric resonator provided by the present invention, the dielectric resonator has three layers of dielectrics 2.1,2.2,2.1, wherein the dielectric 2.1 can be regarded as a cuboid space dielectric wrapped in a dielectric block 2.2, the middle dielectric layer 2.2 is covered by two layers of dielectrics 2.1, the dielectric constants of the two types of dielectrics are different, and the dielectric constant of the dielectric 2.2 is generally higher than that of the dielectric 2.1. The outer surface of the dielectric filter composed of the mixed dielectric resonant cavity is wrapped by the metal coating, and the dielectric constant of the medium 2.2 is high, so that the electromagnetic field is mostly bound in the medium 2.2, and the loss of the whole dielectric resonator is small.

The shape of the laminated layer in the present invention can be combined in various ways, and only one example is given here for illustration, and no other combinations are listed.

Example 6

The overall structure of the dielectric filter with the mixed dielectric resonator is the same as that of embodiments 1-5, the utility model discloses a three-layer laminated state about still containing two kinds of media in the laminated state of the multi-media combination, one of them the medium is two-layer about being located, and the shape presents has a cylinder, cuboid, cube, ellipsoid, opposite sex etc. another the medium is located the intermediate level, and the shape presents a cylinder, cuboid, cube, ellipsoid, opposite sex, two kinds of medium combinations splice together.

In this embodiment, refer to fig. 1, fig. 1 is a side view of a three-layer dielectric resonator provided by the present invention, the dielectric resonator in fig. 1 has three layers of dielectric, the dielectric of the uppermost layer is 2.1, the dielectric of the middle layer is 2.2, the dielectric of the bottommost layer is 2.1, wherein the dielectric 2.1 can be regarded as a cuboid space dielectric wrapped in the dielectric block 2.2, the middle dielectric layer 2.2 is covered by two layers of dielectric 2.1, the dielectric constants of the two media are different, and the dielectric constant of the dielectric 2.2 is usually higher than that of the dielectric 2.1. The outer surface of the dielectric filter composed of the mixed dielectric resonant cavity is wrapped by the metal coating, and the dielectric constant of the medium 2.2 is high, so that the electromagnetic field is mostly bound in the medium 2.2, and the loss of the whole dielectric resonator is small.

The shape of the three-layer laminated layer in the utility model can be combined in various ways, and only one example is given here for explanation, and other combinations are not listed.

The utility model provides a dielectric filter has adopted a plurality of interconnect's novel dielectric waveguide resonant cavity, and this dielectric waveguide resonant cavity key feature is formed by the medium combination of two kinds or two kinds of different dielectric constants more than, through the form that adopts the different shape combinations of high low dielectric constant medium for the electromagnetic field mainly ties in high dielectric constant's medium, thereby reduces dielectric filter's loss. The utility model discloses can realize low-loss performance, have simultaneously with low costs concurrently, characteristics such as reliability height for among the modern communication system.

Example 7

Contain mixed dielectric resonator's dielectric filter with embodiment 1-6, the utility model discloses in through changing the ratio and the shape of the dielectric constant of the inside multiple medium of mixed medium resonant cavity can let the electromagnetic field concentrate in the high dielectric constant medium in the mixed medium resonant cavity, reduce the current strength of superficial layer, reduce ohmic loss, improve the no-load quality factor of medium resonant cavity reduces dielectric filter's insertion loss.

In the present embodiment, referring to fig. 5, fig. 5 is a perspective view of a dielectric resonator with tuning blind holes, which is composed of two dielectrics with different dielectric constants, in FIG. 5, the rectangular space 1 and the medium 2 surrounding the medium block 2 are two mediums with different dielectric constants, the dielectric constant of the rectangular space 1 surrounding the medium block 2 is usually higher than that of the medium 2, the outer surface of the medium filter composed of the mixed medium resonant cavity is wrapped by a metal coating, the ratio and the shape of the cuboid space 1 at the periphery of the dielectric block 2 and the dielectric block 2 are changed, so that an electromagnetic field in the mixed dielectric resonant cavity can be concentrated in the cuboid space 1 at the periphery of the dielectric block 2 with high dielectric constant, the current intensity of the surface layer is reduced, the no-load quality factor of the medium resonant cavity is improved, and the loss of the medium resonant cavity is reduced.

Example 8

In the same manner as in embodiments 1 to 7, the tuning blind hole is provided above the resonant cavity, and the resonant frequency of the resonant cavity can be flexibly controlled by changing the depth of the tuning blind hole.

In this embodiment, referring to fig. 5, fig. 5 is a side view of a dielectric resonator with tuning blind holes, which is composed of two media with different dielectric constants, provided by the present invention, the dielectric resonator is composed of a cylindrical dielectric block 2, a rectangular solid space 1 at the periphery of the dielectric block 2 and a tuning blind hole above the dielectric block 2, the rectangular solid space 1 and the dielectric block 2 at the periphery of the dielectric block 2 are two media with different dielectric constants, the dielectric constant of the rectangular solid space 1 at the periphery of the dielectric block 2 is usually higher than that of the dielectric block 2, the outer surface of the dielectric filter composed of the mixed dielectric resonant cavity is wrapped by a metal coating, as the dielectric constant of the cuboid space medium 1 at the periphery of the dielectric block 2 is higher, the electromagnetic field is mostly bound in the cuboid space 1 at the periphery of the dielectric block 2, so that the loss of the whole dielectric resonator is smaller. By controlling the depth of the debugging blind hole 3, the main resonant frequency of the dielectric resonator can be flexibly controlled, wherein the deeper the debugging blind hole is, the lower the main resonant frequency of the dielectric filter is.

Example 9

The utility model discloses still a dielectric filter's that contains mixed dielectric resonator use, dielectric filter that contains mixed dielectric resonator with embodiment 1-8 for among the receiving and dispatching passageway among the communication system, connect in the receiving and dispatching passageway radio frequency front end filter circuit among the communication system, realize the selection of receiving and dispatching signal frequency, can see fig. 11 and fig. 12.

In this embodiment, referring to fig. 11, fig. 11 is a top side view of a six-cavity cross-coupled dielectric filter provided by the present invention. The cross-coupling dielectric filter with six cavities in fig. 11 comprises a dielectric body 6 comprising two input connectors 7 and an output connector 8, six dielectric blocks are arranged clockwise in sequence as a first dielectric block 2-1, a second dielectric block 2-2, a third dielectric block 2-3, a fourth dielectric block 2-4, a fifth dielectric block 2-5 and a sixth dielectric block 2-6, a first coupling window 3-12, a second coupling window 3-23, a third coupling window 3-34, a fourth coupling window 3-56 and a fifth coupling window 3-36 are arranged between every two resonant cavities connected by the five coupling windows, a coupling hole 4 is positioned between the dielectric blocks 2-4 and 2-5, and the outer surface of the dielectric filter is wrapped by a metal coating conducting layer. In this example, six dielectric blocks are all contained in the dielectric body 6, the six dielectric blocks and the dielectric body 6 together form six resonant cavities of the filter, the dielectric constants of the six dielectric blocks are different from that of the dielectric body 6, and the dielectric constants of the six dielectric blocks are generally greater than that of the dielectric body 6. The coupling windows 3-12 are located between the dielectric blocks 2-1 and 2-2, the coupling windows 3-23 are located between the dielectric blocks 2-2 and 2-3, the coupling windows 3-34 are located between the dielectric blocks 2-3 and 2-4, the coupling windows 3-56 are located between the dielectric blocks 2-5 and 2-6, and the coupling windows 3-36 are located between the dielectric blocks 2-3 and 2-6, and in normal operation, the electromagnetic field distribution in the dielectric filter will show coupling windows, which are all inductive coupling. A coupling medium block 5-1 is added below the coupling hole 4, so that negative coupling is realized. Referring to fig. 12, fig. 12 is a frequency response curve of a low-loss sixth-order dielectric filter according to the present invention, it can be seen from the figure that a low-sideband transmission zero is added to the low-sideband, and the present invention finally forms two transmission zeros in the left and right sidebands of the dielectric filter, thereby improving the selectivity of the dielectric filter. Fig. 12 is a frequency response curve of a low-loss sixth-order dielectric filter obtained through simulation experiments, and it can be seen that the dielectric filter has a small insertion loss in a band. The cross-coupled dielectric filter with six cavities in the embodiment not only can realize better selection performance and realize the basic requirements of a filter circuit, but also realizes low power consumption and effectively reduces the loss of the whole transceiving channel.

Will the utility model discloses use in the transmitter, compare in traditional wave filter, reduced the transmission loss of transmitter. The dielectric filter has smaller insertion loss, so that the overall power consumption of the base station, the satellite, the radar and other systems applying the dielectric filter is reduced, and the positive promotion effect is generated on the large-area use of the new generation base station, the satellite and the integrated radar.

Example 10

The overall structure of the dielectric filter including the hybrid dielectric resonator is similar to that of embodiments 1 to 9, and this embodiment is also an example of the use of the dielectric filter, and the present invention can be used for communication of a base station or a satellite, and is connected to a radio frequency front end filter circuit of a transmission/reception channel in a communication system, so as to realize selection of a frequency of a transmission/reception signal, see fig. 13 and 14.

In this embodiment, fig. 13 is a top side view of a cross-coupled dielectric filter with tuned blind holes and loaded six cavities according to the present invention, the dielectric filter in fig. 13 comprises two input and output connectors 7 and 8, and comprises a dielectric body 6, six dielectric blocks are sequentially arranged clockwise to form a first dielectric block 2-1, a second dielectric block 2-2, a third dielectric block 2-3, a fourth dielectric block 2-4, a fifth dielectric block 2-5, a sixth dielectric block 2-6, five coupling windows are connected between every two resonant cavities and sequentially form a first coupling window 3-12, a second coupling window 3-23, a third coupling window 3-34, a fourth coupling window 3-56 and a fifth coupling window 3-36, a coupling hole 4 is located between the dielectric blocks 2-4 and 2-5, and a metal coating conducting layer wraps the outer surface of the dielectric filter. In this example, six dielectric blocks are included in the dielectric body 6, the six dielectric blocks and the dielectric body 6 together form six resonant cavities of the filter, the dielectric constants of the six dielectric blocks are different from that of the dielectric body 6, and the dielectric constants of the six dielectric blocks are generally larger than that of the dielectric body 6. In this example, the 6 resonator blocks each contain a tuning blind hole for adjusting the resonant frequency. The coupling window 3-12 is located between the dielectric blocks 2-1 and 2-2, the coupling window 3-23 is located between the dielectric block 2-2 and the dielectric block 2-3, the coupling window 3-34 is located between the dielectric blocks 2-3 and 2-4, the coupling window 3-56 is located between the dielectric blocks 2-5 and 2-6, the coupling window 3-36 is located between the dielectric blocks 2-3 and 2-6 and is inductive coupling, the coupling hole 4 is added with the coupling dielectric block 5-1 below to realize negative coupling, a low side band transmission zero can be added to a low side band, two transmission zeros are formed at the left side band and the right side band of the dielectric filter finally, and the selectivity of the dielectric filter is improved. Fig. 14 is a simulated experimental frequency response curve of a low-loss, band-tuned and loaded sixth-order dielectric filter according to the present invention, which can be seen to have a small insertion loss in the band. The utility model discloses not only can realize better selectivity, realize filter circuit's basic requirement, realize the low-power consumption moreover, effectively reduce basic station and satellite communication's complete machine loss, increase the loading moreover, further reduced dielectric filter's size, can let dielectric filter satisfy the requirement of the miniaturation in basic station and satellite communication system.

The utility model provides a pair of new dielectric filter contains multiple mixed medium resonant cavity form among this dielectric filter, improvement dielectric filter's that can be very big whole electrical property. The utility model discloses a dielectric filter contains: the dielectric waveguide resonant cavities are formed by combining two or more than two media with different dielectric constants, the media with different dielectric constants of the formed dielectric resonant cavities can be combined in any geometric structure, one of the advantages of the design is that the main resonant frequency and the higher-order mode can be flexibly controlled, and the other is that the no-load quality factor of the dielectric resonant cavities is improved, the loss of the cavities is reduced, and therefore the performance of the dielectric waveguide filter is improved; coupling windows are arranged between the medium resonant cavities and have capacitive property and inductive property; coupling holes can be arranged between the medium resonant cavities, and the depth of the coupling holes can change the coupling property; the outer surface of the whole dielectric filter is a metal coating. The dielectric filter can realize low-loss performance, has the characteristics of low cost, high reliability and the like, and can be used in a modern communication system.

The present invention will be further described with reference to various forms of the mixed medium chamber of the present invention.

Example 11

The overall structure of the dielectric filter including the hybrid dielectric resonators is the same as that of embodiments 1 to 10, and fig. 1 to 4 show several forms of the hybrid dielectric resonators in the dielectric filter according to the present invention. Fig. 1 is a side perspective view of a dielectric resonator provided by the present invention, as shown in fig. 1, the dielectric resonator has three layers of dielectric to form 2.1,2.2,2.1, the middle dielectric layer 2.2 is covered by two layers of dielectric 2.1, the dielectric constants of the two media are different, the dielectric constant of the dielectric 2.2 is usually higher than that of the dielectric 2.1, the whole dielectric resonator is wrapped by a metal layer, because the dielectric constant of the dielectric block 2.2 is higher, the electromagnetic field is bound in the dielectric 2.2 more, so that the loss of the whole dielectric resonator is smaller. Fig. 2 to 4 are a dielectric resonator of a combination of a cylindrical shape and a rectangular parallelepiped, fig. 2 is a side perspective view of the dielectric resonator, fig. 3 is a plan view of the resonator, and fig. 4 is a sectional view of the resonator as viewed from a-a' section in fig. 2 and 3. This syntonizer is by the dielectric block 2 for the cylinder, debugging blind hole 3 and the peripheral cuboid space medium 1 of dielectric block 2 that the top set up constitute, and medium 1 and dielectric block 2 are two kinds of dielectric constant different mediums, make medium 1's dielectric constant be higher than dielectric block 2 usually, and whole dielectric syntonizer is wrapped up by metal level coating film, because medium 1's dielectric constant is higher, and the electromagnetic field is restrainted in medium 1 more for whole dielectric syntonizer's loss is less.

The shapes of the medium 2.1 and the medium 2.2 in the mixed dielectric resonator fig. 1 and the medium 2 in fig. 2 in this embodiment may be a cylinder, a cuboid, a cube, an ellipsoid, an irregular shape, etc., which is not limited in the embodiment of the present invention.

Example 12

The overall structure of the dielectric filter including the hybrid dielectric resonator is the same as that of embodiments 1 to 11, and in order to improve the ease of tuning the dielectric resonator, fig. 5 is a perspective view of a dielectric resonator with tuning blind holes, which is composed of two dielectrics with different dielectric constants, according to the present invention, fig. 6 is a plan view of the dielectric resonator of fig. 5, and fig. 7 is a sectional view of the dielectric resonator AA' of fig. 5 and 6. As shown in fig. 5, the dielectric resonator in fig. 5 is composed of two dielectrics 1 and 2 with dielectric constants, the dielectric 2 is in a cylindrical form, a tuning blind hole 3 is added on the dielectric 2, the surrounding body space dielectric 1 is a cuboid, and the surrounding body space dielectric 1 wraps the dielectric 2. Fig. 7 clearly shows the form of the blind hole 3, by means of which blind hole 3 an adjustment of the resonance frequency of the resonator can be accomplished. The whole dielectric resonator is wrapped by a metal layer, the dielectric constants of the dielectric 2 and the surrounding body space dielectric 1 are usually different by more than multiple times, and the dielectric 2 is usually made of a material with a high dielectric constant, so that an electromagnetic field is mostly bound in the dielectric 2, and the loss of the dielectric resonator is reduced.

The shape of the surrounding body space medium 1 and medium 2 in the mixed dielectric resonator figure 5 in this embodiment can be a cylinder, a cuboid, a cube, an ellipsoid, a special shape, etc., which is not limited in the embodiment of the present invention.

Example 13

The overall construction of the dielectric filter including the hybrid dielectric resonator is the same as that of embodiments 1 to 12, and in order to simultaneously consider tuning and miniaturization of the dielectric resonator, the present invention is designed as a dielectric resonator loaded as shown in fig. 8 to 10, fig. 8 is a side perspective view of the dielectric resonator, fig. 9 is a top view of the dielectric resonator, and fig. 10 is a side view of the dielectric resonator as seen from a-a' section in fig. 8 and 9. As shown in fig. 8, the dielectric resonator is composed of two dielectric constants, namely, a dielectric 2 and a surrounding body space 1, the dielectric 2 is in a two-layer cylinder form, loading can be increased due to the use of the two layers of cylinders, the size of the resonator is reduced, a debugging blind hole 3 is additionally arranged on the dielectric 2, the dielectric 2 is a cuboid, the dielectric 2 is wrapped in the surrounding body space dielectric 1, fig. 10 clearly shows the two-layer cylinder composition of the dielectric 2 and the form of the blind hole 3, and the resonant frequency of the resonator can be adjusted through the blind hole 3. The whole dielectric resonator is wrapped by a metal layer, the dielectric constants of the dielectric 2 and the surrounding body space dielectric 1 are usually different by more than multiple times, and the dielectric 2 is usually made of a material with a high dielectric constant, so that an electromagnetic field is mostly bound in the dielectric 2, and the loss of the dielectric resonator is reduced.

The shape of the surrounding body space medium 1 and medium 2 in the mixed dielectric resonator figure 8 in this embodiment can be a cylinder, a cuboid, a cube, an ellipsoid, a special shape, etc., which is not limited in the embodiment of the present invention.

Example 14

The overall construction of the dielectric filter containing the hybrid dielectric resonators is the same as in examples 1-13, fig. 11 is a top side view of a six-cavity cross-coupled dielectric filter, and fig. 12 is the actual response of the filter. As shown in fig. 11, the dielectric filter comprises two input and output connectors 7,8, a dielectric body 6, six dielectric blocks 2-1,2-2,2-3,2-4,2-5,2-6, five coupling windows 3-12,3-23,3-34,3-56,3-36, a coupling hole 4, and a conductive layer attached to the surface of the dielectric filter. In this example, six dielectric blocks 2-1,2-2,2-3,2-4,2-5,2-6 are included in the dielectric body 6, the six dielectric blocks 2-1,2-2,2-3,2-4,2-5,2-6 and the dielectric body 6 work together to form six resonant cavities of the filter, the six dielectric blocks 2-1,2-2,2-3,2-4,2-5,2-6 have different dielectric constants from the dielectric body 6, and the dielectric constants of the six dielectric blocks 2-1,2-2,2-3,2-4,2-5,2-6 are usually larger than the dielectric body 6. The coupling windows 3-12,3-23,3-34,3-56 and 3-36 are inductive coupling, and a dielectric block is added below the coupling hole 4 to realize negative coupling, so that the dielectric filter realizes two transmission zeros and the selectivity of the dielectric filter is improved. Fig. 12 is a response of the dielectric filter, and it can be seen that the dielectric filter has a small insertion loss in the band.

The shape of dielectric resonator's the dielectric block and the dielectric body 6 in this embodiment can be for cylinder, cuboid, square, ellipsoid, dysmorphism etc. the embodiment of the utility model provides an it does not prescribe a limit to.

Example 15

The overall construction of the dielectric filter containing the hybrid dielectric resonators is the same as in examples 1-14, fig. 13 is a top side view of a cross-coupled dielectric filter with tuned blind holes and loaded six cavities, and fig. 14 is the actual response of the filter. As shown in fig. 13, the dielectric filter comprises two input and output connectors 7,8, a dielectric body 6, six dielectric blocks 2-1,2-2,2-3,2-4,2-5,2-6, five coupling windows 3-12,3-23,3-34,3-56,3-36, six tuning holes 6, coupling holes 4, and a conductive layer attached to the surface of the dielectric filter. In this example, six dielectric blocks are included in the dielectric body 6, the six dielectric blocks and the dielectric body 6 together form six resonant cavities of the filter, the dielectric constants of the six dielectric blocks are different from that of the dielectric body 6, and the dielectric constants of the six dielectric blocks are generally larger than that of the dielectric body 6. In this example, the 6 resonator blocks each contain a tuning blind hole for adjusting the resonant frequency. The coupling windows 3-12,3-23,3-34,3-56 and 3-36 are in inductive coupling, a coupling dielectric block is added below the coupling hole 4 to realize negative coupling, and the coupling dielectric block 7 is added on the left side of the coupling hole to enhance the negative coupling, so that the dielectric filter realizes two transmission zeros and the selectivity of the dielectric filter is improved. Fig. 14 is a graph showing a response of a simulation experiment of the dielectric filter, and it can be seen that the dielectric filter has a small insertion loss in a band.

The shape of dielectric resonator's the dielectric block and the dielectric body 6 in this embodiment can be for cylinder, cuboid, square, ellipsoid, dysmorphism etc. the embodiment of the utility model provides an it does not prescribe a limit to.

All figures of the present invention show some, but not all embodiments of the present invention. The invention may be embodied in many different forms and is not limited to the embodiments described above. Rather, these embodiments are provided so that this disclosure will be thorough and complete. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the scope of the protection of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

To sum up, the utility model provides a pair of dielectric filter who contains mixed dielectric resonator has solved dielectric filter's insertion loss big with main resonant frequency, the difficult problem that changes of higher mode. The body of the dielectric filter of the utility model is provided with a dielectric block, a coupling hole and a coupling dielectric block, the dielectric block and the body space around the self position jointly form a mixed dielectric resonant cavity, and the dielectric block and the body are two different media; in the dielectric filter, the dielectric block in the mixed dielectric resonant cavity is either single-layer or multi-layer, wherein the multi-layer dielectric block structure is two or more media with different dielectric constants, and can be combined in any geometric structure; the coupling hole and the coupling medium block are positioned between the two mixed medium resonant cavities and are in negative coupling, so that the filter response with or without cross coupling is realized; the outer surface of the dielectric filter is either a hard metal coating film or an arbitrary metal plating film. The utility model discloses need high-quality filtering in can being used for the communication. The dielectric resonator of the present invention contains two or more different dielectric constants, or is provided in a wrapped form or stacked layer, and can be combined by a plurality of geometric structures. The utility model discloses a nimble control main resonant frequency and higher order mode still improve the no-load quality factor of medium resonant cavity, reduce the loss of cavity. The frequency selection circuit is used for communication of a base station or a satellite, is connected in a receiving and transmitting channel radio frequency front end filter circuit in a communication system, and realizes the selection of receiving and transmitting signal frequencies.

The embodiment of the utility model provides an in the dielectric resonator mainly used dielectric filter design, the dielectric filter who provides is arranged in the radio frequency front end of high-power wireless communication basic station radio frequency front end, little communication radio frequency front end, leidi equipment.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the patent. It should be noted that, for those skilled in the art, without departing from the patent concept, several changes and modifications can be made, which are within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (8)

1. A dielectric filter containing a mixed dielectric resonator comprises a dielectric body, resonant cavities, coupling windows, external metal conducting layers, input connectors and output connectors, wherein the input connectors and the output connectors are led out from the resonant cavities in the body; in the dielectric filter body, the dielectric block in the mixed dielectric resonant cavity is in a single-layer or multi-layer combination mode, wherein the structure of the multi-layer combined dielectric block is the combination of two or more media with different dielectric constants; the coupling hole and the coupling medium block are positioned between the two mixed medium resonant cavities and are in negative coupling, so that the filter response with or without cross coupling is realized; the metal conducting layer outside the mixed dielectric filter is a hard metal coating film or any metal plating film.

2. The dielectric filter with the mixed dielectric resonator according to claim 1, wherein the resonant frequency of the resonator is changed by arranging a tuning blind hole above all the resonant cavities of the body, specifically by adjusting the depth of the blind hole; the coupling hole and the coupling medium block are positioned between the two mixed medium cavities, and when two coupling medium blocks with different shapes exist, the coupling hole and the coupling medium block are also positioned between the two adjacent mixed medium cavities; when two coupling dielectric blocks are arranged, one coupling dielectric block is platform-shaped, the other coupling dielectric block is vertically arranged, a coupling hole is formed above the platform-shaped coupling dielectric block, the two coupling dielectric blocks are positioned between the two mixed dielectric cavities, the vertical central lines of the structures of the two coupling dielectric blocks are parallel to each other, stronger negative coupling can be generated, and filter response with cross coupling or without cross coupling is realized.

3. The dielectric filter having the hybrid dielectric resonator according to claim 2, wherein the dielectric block structure of the multilayer combination in the hybrid dielectric resonator is either in a wrapped state or in a stacked state.

4. The dielectric filter having a hybrid dielectric resonator according to claim 3, wherein said wrapped state is one of two media, one of which is in the shape of a cylinder, a rectangular parallelepiped, a cube, an ellipsoid, a boss, a double boss, a profile, and the other of which is wrapped in said medium and is in the shape of a cylinder, a rectangular parallelepiped, a cube, an ellipsoid, a profile.

5. A dielectric filter having a hybrid dielectric resonator according to claim 3, wherein in the stacked state, one of the two dielectric layers has a shape of a rectangular parallelepiped with a convex projection, and the other of the two dielectric layers has a shape of a rectangular parallelepiped with a concave hole, and the two dielectric layers are joined together; the shape of the boss and the concave hole can be a cylinder, a cuboid, a cube, an ellipsoid or a special shape.

6. The dielectric filter having a hybrid dielectric resonator according to claim 5, wherein said stacked state further comprises two kinds of dielectric layers of upper, middle and lower layers, one of said dielectric layers being located in upper and lower layers and having a cylindrical, rectangular, cubic, ellipsoidal, irregular shape, and the other of said dielectric layers being located in an intermediate layer and having a cylindrical, rectangular, cubic, ellipsoidal, irregular shape, said two kinds of dielectric layers being combined together.

7. The dielectric filter having the mixed dielectric resonator according to any of claims 1 to 6, wherein the ratio and the shape of the dielectric constants of the plurality of media inside the mixed dielectric resonator are changed to concentrate the electromagnetic field in the mixed dielectric resonator in the high dielectric constant medium, thereby reducing the current intensity of the surface layer and the ohmic loss.

8. The dielectric filter with the mixed dielectric resonator as claimed in claim 1,2, 3, 4, 5 or 6, wherein a tuning blind hole is provided above the resonant cavity, and the resonant frequency of the resonant cavity can be flexibly controlled by changing the depth of the tuning blind hole.

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