JP2024501799A - Dielectric filters, transceivers, and base stations - Google Patents

Abstract

This application solves the problem that the arrangement of dielectric filter topology is limited and the out-of-band rejection performance is insufficient, and further realizes flexible arrangement of filter topology and improves the out-of-band rejection performance of dielectric filter. A dielectric filter, a transceiver, and a base station are provided. A dielectric filter includes a dielectric, an input port, an output port, an internal dielectric resonator, and an external dielectric resonator arranged on the dielectric, and a plurality of internal dielectric resonators between the input port and the output port. A dielectric resonator is arranged to form a cascade-coupled resonator of the main coupling channel, and two external dielectric resonators are arranged on one side of the input port, and the external dielectric resonator and the input port The amount of coupling with the external dielectric resonator is greater than the amount of coupling with either the external dielectric resonator or the internal dielectric resonator, and/or two external dielectric resonators are placed on one side of the output port, and the external dielectric resonator The amount of coupling between the body resonator and the output port is greater than the amount of coupling between either the external dielectric resonator or the internal dielectric resonator.

Description

TECHNICAL FIELD This application relates to the field of communication device components, and more particularly to dielectric filters, transceivers, and base stations.

With the rapid development of wireless communication base station equipment, and in particular the wide range of applications for base stations using 5G Massive Multiple-Input Multiple-Output (Massive MIMO, Massive Multiple-Input Multiple-Output) technology, miniaturization and better integration are becoming increasingly common. As a mounting form, dielectric waveguide filters are attracting more attention and are being increasingly researched in the industry.

A dielectric filter is usually composed of a plurality of resonators, and these resonators are coupled together. Coupling between resonators is classified based on polarity into inductive coupling (which may be referred to as positive coupling) and capacitive coupling (which may be referred to as negative coupling). A transmission zero point may be generated based on the polarity of the coupling between the resonators. A transmission zero point, also called an attenuation pole or notch point, is a frequency outside the filter's passband at which the rejection applied by the filter to a signal at a frequency is theoretically infinite.

For prior art dielectric filters, the transmission zero function of the dielectric filter is typically implemented by adding cross-coupling to the main transmission channel of the dielectric filter. However, this increases the complexity of the structure and may result in out-of-band rejection.

Embodiments of the present application provide a dielectric filter, a transceiver, and a base station to solve the problem of insufficient out-of-band rejection performance of a dielectric filter and improve the out-of-band rejection performance of a dielectric filter. I will provide a.

To achieve the above objective, the following technical solutions are used in this application.

According to a first aspect, a dielectric filter is provided. A dielectric filter includes a dielectric, an input port, an output port, an internal dielectric resonator, and an external dielectric resonator arranged on the dielectric. A plurality of internal dielectric resonators are disposed between the input port and the output port to form a cascade coupled resonator of the main coupling channel. Two external dielectric resonators are arranged on one side of the input port, and the amount of coupling between the external dielectric resonator and the input port is greater than the amount of coupling between the external dielectric resonator and either of the internal dielectric resonators. is large and/or two external dielectric resonators are placed on one side of the output port, and the amount of coupling between the external dielectric resonator and the output port is the same as that of the external dielectric resonator and the internal dielectric resonator. It is larger than the amount of binding with either.

The internal dielectric resonator is configured to transmit high frequency signals. Multiple internal dielectric resonators may be arranged. The specific number of internal dielectric resonators to be placed depends on factors such as high frequency signal transmission requirements and the size of the dielectric filter. A plurality of internal dielectric resonators disposed between the input port and the output port are coupled to form a main coupling channel along which a high frequency signal is transmitted. Two external dielectric resonators are arranged on one side of the input port, and the amount of coupling between the external dielectric resonator and the input port is greater than the amount of coupling between the external dielectric resonator and either of the internal dielectric resonators. It's also big. Alternatively, two external dielectric resonators are placed on one side of the output port, and the amount of coupling between the external dielectric resonator and the output port is equal to the coupling amount between the external dielectric resonator and the internal dielectric resonator. greater than quantity. In this way, a pair of transmission zeros may be obtained, the two transmission zeros being respectively placed on either side of the passband of the dielectric filter. If the aforementioned conditions are met and two external dielectric resonators are placed on one side of the input port and one side of the output port, two pairs of transmission zero points may be obtained. One side of the input or output port in some embodiments is either side of the input or output port. The amount of coupling between the external dielectric resonator and the input or output port must be greater than the amount of coupling between the external dielectric resonator and either the internal dielectric resonator, so Preferably, a dielectric resonator is arranged on each side of the input port or the output port. Two transmission zero points can be implemented by adding two external dielectric resonators outside the input or output ports, thereby improving the out-of-band rejection performance of the dielectric filter. In addition, both cascade-coupled resonators with a staggered topology structure and cascade-coupled resonators with a linear topology structure can be used, so the internal arrangement of the dielectric filter can be flexibly set. Therefore, dielectric filters have a simple structure, good reliability and cost effectiveness, are moldable, and are convenient for mass production.

In one possible implementation of the first aspect, the included angle between the first line and the second line is greater than or equal to 90° and/or between the third line and the fourth line. The included angle is 90° or more.

The first line is a line between the center of the external dielectric resonator and the center of the input port. The second line is the line between the center of the internal dielectric resonator closest to the input port and the center of the input port. The third line is a line between the center of the external dielectric resonator and the center of the output port. The fourth line is the line between the center of the internal dielectric resonator closest to the output port and the center of the output port.

In this case, the position of the external dielectric resonator can be adjusted by setting the included angle between the first line and the second line and the included angle between the third line and the fourth line. The amount of coupling between the external dielectric resonator and the input port or the output port can be made larger than the amount of coupling between the external dielectric resonator and any internal dielectric resonator. In this way, one pair of transmission zero points or two pairs of transmission zero points may be obtained.

In one possible implementation of the first aspect, two external dielectric resonators are coupled, one of the external dielectric resonators proximate to the input or output port being connected to the first external dielectric resonator. the other external dielectric resonator is a second external dielectric resonator, and the first external dielectric resonator is coupled to the input port or the output port. In this case, the first external dielectric resonator is coupled to the input or output port in a cascade manner, and the second external dielectric resonator is coupled to the first external dielectric resonator. This contributes to implementing a flexible arrangement of external dielectric resonators, and such a design allows the transmission zero point to be easily obtained.

In one possible implementation of the first aspect, the cascaded resonators of the main coupling channel include cascaded resonators of linear topology and cascaded resonators of staggered topology. In this case, the structural design of the dielectric filter can be simplified by using a cascade-coupled resonator with a linear topology structure in which a plurality of dielectric resonators can be arranged in a straight line. The structure is simple, and the dielectric filter can be easily arranged. Cross-coupling may be created between adjacent internal dielectric resonators in a cascade-coupled resonator in a staggered topology structure. Cross-coupling is useful for implementing the transmission zero function of dielectric filters, and the out-of-band rejection performance of dielectric filters is improved by the creation of transmission zeros by placing external dielectric resonators. .

If the cascade coupled resonator of the main coupling channel is a nonlinear cascade coupled resonator, the first coupling groove is arranged between two adjacent internal dielectric resonators. In this case, the amount of dielectric between two adjacent internal dielectric resonators may be controlled by arranging the first coupling groove. The amount of dielectric can be controlled by controlling the size of the first coupling groove, where the amount of coupling between the two internal dielectric resonators can be controlled. By controlling the amount of coupling between the internal dielectric resonators, the formation of the main coupling channel is controlled. The cascade coupled resonators of the main coupling channel may be of different forms. In practical applications, the arrangement of the cascade-coupled resonators in the main coupling channel may be flexibly adjusted, making it easier overall to arrange the dielectric filter.

In one possible implementation of the first aspect, the external dielectric resonator includes a resonator body defined by a portion of the dielectric and a debug hole located in the resonator body. A debug hole is a blind hole or a through hole. In this case, by making the debug hole a blind hole or a through hole, the degree of freedom in designing the external dielectric resonator can be maintained.

In embodiments of the present application, the shape of the first coupling groove is related to the amount of coupling between internal dielectric resonators in a cascade coupled resonator of a staggered topology structure. The first coupling groove may be used to control the amount of coupling between two internal dielectric resonators by controlling the amount of dielectric between the two internal dielectric resonators. The amount of dielectric between the dielectric resonators may be determined by setting the amount of coupling between the two internal dielectric resonators, whereby the corresponding shape of the first coupling groove is determined. Good too.

In one possible implementation of the first aspect, the second external dielectric resonator is coupled to the internal dielectric resonator near the port, and the internal dielectric resonator near the port is coupled to the second external dielectric resonator. The internal dielectric resonator is adjacent to the port on the side where the external dielectric resonator is arranged. In this case, the first external dielectric resonator is coupled to an input port or an output port, the input port is coupled to an adjacent internal dielectric resonator, and the output port is coupled to an adjacent internal dielectric resonator. A second external dielectric resonator is further coupled to the internal dielectric resonator near the port. Therefore, the arrangement of the filter topology may be a staggered arrangement if the external dielectric resonator is further coupled to the internal dielectric resonator near the port. Specifically, the two external dielectric resonators and the internal dielectric resonator near the port are arranged in a triangular shape. With this arrangement, cross-coupling is more likely to occur between the two external dielectric resonators and the internal dielectric resonator near the port, resulting in better out-of-band rejection.

In one possible implementation of the first aspect, coupling holes and/or coupling grooves are arranged between the external dielectric resonator and the internal dielectric resonator near the port, and the coupling holes and/or coupling grooves are arranged between the external dielectric resonator and the internal dielectric resonator near the port. The resonator is an internal dielectric resonator adjacent to the port on the side where the external dielectric resonator is located.

In this case, by arranging the coupling hole or the second coupling groove, the input port and the internal dielectric resonator arranged on both sides of the input port can be connected using the arranged coupling hole or the second coupling groove. The amount of coupling with the external dielectric resonator, or the amount of coupling between the output port and the internal dielectric resonator and external dielectric resonator arranged on both sides of the output port may be adjusted. The coupling hole and the second coupling groove adjust the amount of coupling between the input port and the internal dielectric resonator and the external dielectric resonator, and adjust the amount of coupling between the output port and the internal dielectric resonator and external dielectric resonator. These are different forms of mechanisms for adjusting. In actual application, the corresponding coupling hole or second coupling groove may be designed according to the requirements of the coupling amount between the input port or the output port and the internal dielectric resonator and the external dielectric resonator. By using the coupling hole and the second coupling groove together, various designs and flexible adjustments to the amount of coupling between the internal dielectric resonator and the external dielectric resonator may be implemented.

In one possible implementation of the first aspect, the coupling hole is a blind hole or a through hole and the second coupling groove is a blind groove. In this case, the coupling hole is set as a through hole or a blind hole, and the effect of adjusting the amount of coupling between the input port or output port and the dielectric resonator of the corresponding port by using the through hole is that the blind hole It is different from the effect brought about by using it. Whether through-holes or blind holes are used depends on the requirements for controlling the amount of bonding. In this way, the amount of coupling between the input port or output port and each dielectric resonator can be adjusted more easily. This simple adjustment method facilitates manufacturing and processing of dielectric filters.

In one possible implementation of the first aspect, the second coupling groove is arranged between the internal dielectric resonator and the external dielectric resonator adjacent the input port or the output port, and the second coupling groove The coupling groove does not communicate with either the internal dielectric resonator disposed at one end of the second coupling groove or the external dielectric resonator disposed at the other end of the second coupling groove.

In this case, the inner dielectric resonator and the outer dielectric resonator are both adjacent to the input port or both are adjacent to the output port. Since the second coupling groove is designed so that it does not communicate with either the internal dielectric resonator or the external dielectric resonator, the amount of coupling between the input port and the internal dielectric resonator and the amount of coupling between the input port and the external dielectric resonator are The amount of coupling with the resonator may be reduced, and/or the amount of coupling between the output port and the internal dielectric resonator and the amount of coupling between the output port and the external dielectric resonator may be reduced.

In one possible implementation of the first aspect, the second coupling groove is arranged between the internal dielectric resonator and the external dielectric resonator adjacent the input port or the output port, and the second coupling groove One end of the coupling groove communicates with an internal dielectric resonator disposed at one end of the second coupling groove or an external dielectric resonator disposed at the other end of the second coupling groove.

In this case, both the internal dielectric resonator and the external dielectric resonator are adjacent to the input or output port. configured to communicate one end of the second coupling groove with an internal dielectric resonator disposed at one end of the second coupling groove or an external dielectric resonator disposed at one end of the second coupling groove By doing so, the amount of coupling between the input port or the output port and the internal dielectric resonator or external dielectric resonator that communicates with one end of the second coupling groove may be increased. , the amount of coupling with an internal dielectric resonator or an external dielectric resonator that does not communicate with the second coupling groove becomes small. In this way, by using a dielectric resonator, the amount of coupling between the input port or output port and the internal dielectric resonator or external dielectric resonator is adjusted.

In one possible implementation of the first aspect, the second coupling groove is arranged between the internal dielectric resonator and the external dielectric resonator adjacent the input port or the output port, and the second coupling groove The two ends of the coupling groove each communicate with an internal dielectric resonator disposed at one end of the second coupling groove or an external dielectric resonator disposed at the other end of the second coupling groove. ing.

In this case, the inner dielectric resonator and the outer dielectric resonator are both adjacent to the input port or both are adjacent to the output port. The two ends of the second coupling groove each include an internal dielectric resonator disposed at one end of the second coupling groove and an external dielectric resonator disposed at the other end of the second coupling groove. Because of the communication, the amount of coupling between the input port and the internal dielectric resonator and the amount of coupling between the input port and the external dielectric resonator may be large, and/or the amount of coupling between the input port and the internal dielectric resonator may be large. The amount of coupling between the output port and the external dielectric resonator can become large.

In one possible implementation of the first aspect, the coupling hole is arranged between the inner dielectric resonator and the outer dielectric resonator adjacent the input port or the output port, and the coupling hole is arranged between an axis of the coupling hole and an outer dielectric resonator. , the axis of the internal dielectric resonator and the axis of the external dielectric resonator are parallel to each other.

In this case, manufacturing and processing may be facilitated by making the axis of the coupling hole parallel to the axis of the internal dielectric resonator and the axis of the external dielectric resonator. Furthermore, the amount of coupling between the input port or the output port and the internal dielectric resonator may be adjusted by adjusting the distance between the axis of the coupling hole and the axis of the internal dielectric resonator. The distance between the axis and the axis of the external dielectric resonator may be adjusted to adjust the amount of coupling between the input port or the output port and the external dielectric resonator.

In one possible implementation of the first aspect, both the outer and inner surfaces of the dielectric are metallized. The inner surface of the dielectric includes all the inner surfaces of the through-hole, the inner surface and bottom surface of the blind hole, and the inner surface and bottom surface of the blind groove provided in the dielectric. Metal walls can be formed on the outer and inner surfaces of the dielectric by metallizing the outer and inner surfaces of the dielectric. In this way, a resonant system can be formed in the dielectric.

According to a second aspect, a transceiver comprising a receiver, a transmitter, an amplification unit and a dielectric filter as provided in the first aspect or in any one of the possible implementations of the first aspect. is provided. The transceiver and dielectric filter provided in the previous embodiments have the same technical effect, so the details will not be described again here.

According to a third aspect, a base station is provided that includes an antenna feeder component, a control component, and a transceiver as provided in the second aspect. The base station and transceiver provided in the previous embodiments have the same technical effect, so the details will not be described again here.

1 is a first schematic diagram of a dielectric filter according to an embodiment of the present application; FIG. 3 is a second schematic diagram of a dielectric filter according to an embodiment of the present application; FIG. 3 is a schematic diagram of the topological structure of the dielectric filter shown in FIGS. 1 and 2. FIG. 2 is a response curve of the dielectric filter shown in FIG. 1. 1 is a schematic diagram of a topological structure according to an embodiment of the present application; FIG. 6 is a diagram of an equivalent circuit having an input impedance of the topological structure shown in FIG. 5; FIG. 3 is a third schematic diagram of a dielectric filter according to an embodiment of the present application; FIG. 8 is a schematic diagram of the topological structure of the dielectric filter shown in FIG. 7. FIG. 8 is a response curve of the dielectric filter shown in FIG. 7. FIG. 3 is a first schematic diagram showing coupling of an input port to an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. 11 is a cross-sectional view of a first schematic diagram showing the coupling of the port of FIG. 10 to an internal dielectric resonator and an external dielectric resonator; FIG. FIG. 3 is a second schematic diagram showing coupling between an input port and an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. 13 is a cross-sectional view of a second schematic diagram showing the coupling of the port of FIG. 12 to an internal dielectric resonator and an external dielectric resonator; FIG. FIG. 3 is a third schematic diagram illustrating coupling between an input port and an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. FIG. 15 is a cross-sectional view of a third schematic diagram showing the coupling of the port of FIG. 14 to an internal dielectric resonator and an external dielectric resonator; FIG. 4 is a fourth schematic diagram showing coupling between an input port and an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. FIG. 5 is a fifth schematic diagram showing coupling between an input port and an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. FIG. 7 is a sixth schematic diagram showing coupling between an input port and an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. 19 is a cross-sectional view of a sixth schematic diagram showing the coupling of the port of FIG. 18 to an internal dielectric resonator and an external dielectric resonator; FIG. FIG. 4 is a fourth schematic diagram of a dielectric filter according to an embodiment of the present application; 21 is a schematic diagram of the topological structure of the dielectric filter shown in FIG. 20. FIG. FIG. 5 is a fifth schematic diagram of a dielectric filter according to an embodiment of the present application; 23 is a schematic diagram of the topological structure of the dielectric filter shown in FIG. 22. FIG.

The technical solution in this application will be described below with reference to the accompanying drawings.

In embodiments of this application, words such as "example" and "for example" are used to provide an example, illustration, or explanation. Any embodiment or design solution described using "example" or "for example" in the embodiments of this application is preferred or more advantageous over another embodiment or design solution. It is not to be interpreted. Rather, the use of words such as "example" and "for example" is intended to present related concepts in a concrete manner.

In embodiments of the present application, subscripts such as W ₁ may be incorrectly written in a non-subscript format such as W1. When the difference is not emphasized, _W1 and W1 have the same meaning.

In embodiments of the present application, the terms "first," "second," "third," and "fourth" are used solely for descriptive purposes, relative importance or technical features indicated. cannot be understood as implying or suggesting the amount of. Thus, a feature defined by "first," "second," "third," or "fourth" may explicitly or implicitly include one or more features.

It is to be understood that the terminology used to describe the various examples of this application is intended to describe specific examples only and not to be limiting. As used in the description of the various examples and the appended claims, the singular forms "a," "an," and "the" refer to Plural forms are intended to be included unless otherwise specified.

In this application, "at least one" refers to one or more, and "plurality" refers to two or more. "At least one of the following items (parts)" or similar expressions refers to any of these items (parts), including a single item (part) or any combination of multiple items (parts). Refers to any combination. For example, at least one of a, b, or c may represent a, b, or c, a and b, a and c, b and c, or a, b, and c, where , a, b, and c may be singular or plural.

It is also to be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items. The term "and/or" indicates an associative relationship that describes associated objects and indicates that three relationships may exist. For example, A and/or B may indicate the presence of only A, the presence of both A and B, and the presence of only B. In addition, the character "/" herein generally indicates that the associated subject is in an "or" relationship.

It should be understood that determining B based on A does not mean that B is determined based only on A, but that B may be determined based on A and/or other information.

As used herein, the term "include" (also used as "includes," "including," "comprise," and/or "comprising") refers to the described feature, an integer, Indicates that a step, action, element, and/or component is present, but excludes the presence or addition of one or more other features, integers, steps, actions, elements, components, and/or collections thereof I also want people to understand that I haven't done it.

As used throughout this specification, "one embodiment," "one embodiment," and "one possible implementation" refer to the terms "one embodiment", "one embodiment", and "one possible implementation" when a particular feature, structure, or characteristic of the embodiment or implementations is present. to be understood as meaning included in at least one embodiment of the application. Thus, as used throughout this specification, "one embodiment," "an embodiment of the present application," or "one possible implementation" do not necessarily refer to the same embodiment. Moreover, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Please refer to FIG. FIG. 1 is one of the schematic diagrams of a dielectric filter, according to an embodiment of the present application. As shown in FIG. 1, the dielectric filter includes a dielectric, an input port 10, an output port 20, an internal dielectric resonator, and an external dielectric resonator arranged on the dielectric. A plurality of internal dielectric resonators are arranged between input port 10 and output port 20 to form a cascade coupled resonator of the main coupling channel. Two external dielectric resonators are arranged outside the input port 10 and/or arranged outside the output port 20.

In embodiments of the present application, the outside of the input port 10 is the side opposite the side of the input port 10 facing the output port 20, and the outside of the output port 20 is the side opposite the side facing the input port 10. It is. The cascade-coupled resonator of the main coupling channel includes a plurality of cascade-coupled internal dielectric resonators. Among the plurality of internal dielectric resonators, a channel formed by consecutively coupling channels with a strong coupling effect between two adjacent internal dielectric resonators is a main coupling channel. As shown in FIG. 7, the main coupling channel between the internal dielectric resonator 11, the internal dielectric resonator 12, the internal dielectric resonator 13, and the internal dielectric resonator 14 is indicated by the dashed line in FIG. is shown using.

Based on this, the internal dielectric resonator is arranged between the input port 10 and the output port 20. The internal dielectric resonator is configured to transmit high frequency signals. Multiple internal dielectric resonators may be arranged. The specific number of internal dielectric resonators to be placed depends on factors such as high frequency signal transmission requirements and the size of the dielectric filter. A plurality of internal dielectric resonators disposed between input port 10 and output port 20 are coupled to form a main coupling channel along which a high frequency signal is transmitted. By placing two external dielectric resonators outside the input port 10 or output port 20, a pair of transmission zeros can be obtained, the two transmission zeros being placed respectively on either side of the passband of the present filter. be done. If two external dielectric resonators are placed outside both the input port 10 and the output port 20, two pairs of transmission zero points may be obtained.

The two transmission zero points can be implemented by adding two external dielectric resonators outside the input port 10 or the output port 20 without being affected by the arrangement of the filter topology of the internal dielectric resonators; Thereby, the out-of-band rejection performance of the dielectric filter can be improved. In addition, both cascaded resonators with a staggered topology structure and cascaded resonators with a linear topology structure can be used, allowing a flexible arrangement of the internal dielectric resonators inside the dielectric filter. . Therefore, dielectric filters have a simple structure, good reliability and cost effectiveness, are moldable, and are convenient for mass production.

The specific number of internal dielectric resonators to be arranged depends on the actual functional requirements of the dielectric filter. See, for example, FIGS. 1 and 3. FIG. 1 is a first schematic diagram of a dielectric filter according to an embodiment of the present application. FIG. 3 is a schematic diagram of the topological structure of the dielectric filter shown in FIG. As shown in FIGS. 1 and 3, four internal dielectric resonators, internal dielectric resonator 11, internal dielectric resonator 12, internal dielectric resonator 13, and internal dielectric resonator 14, are arranged. There is. Internal dielectric resonator 11 is coupled to input port 10 . Internal dielectric resonator 12 is coupled to internal dielectric resonator 11 . Internal dielectric resonator 13 is coupled to internal dielectric resonator 12 . Internal dielectric resonator 14 is coupled to internal dielectric resonator 13 . Output port 20 is coupled to internal dielectric resonator 14 . In this case, the high frequency signal is transmitted via the internal dielectric resonator 11, the internal dielectric resonator 12, the internal dielectric resonator 13, and the internal dielectric resonator 14, that is, in the direction shown by the arrow in FIG. Ru. This path is the main coupling channel.

In the following description, the principle of creating a transmission zero point by placing two external dielectric resonators outside the input port 10 and/or outside the output port 20 will be explained. This embodiment will be described using an example in which two external dielectric resonators are arranged outside the input port 10.

See FIGS. 5 and 6. FIG. 5 is a schematic diagram of a topology structure, according to an embodiment of the present application. FIG. 6 is a diagram of an equivalent circuit having an input impedance of the topology shown in FIG. In the circuit topology shown in FIG. 5, external dielectric resonator 1 and external dielectric resonator 2 in the figure form a series-coupled removal resonator, providing a transmission zero point across the entire link. For conventional out-of-band zero cavity resonators, non-resonant nodes, and rejection resonators, the resonant frequency of the conventional NRN redundant resonator is located at the transmission zero point. On the other hand, the resonant frequency of external dielectric resonator 1 and external dielectric resonator 2 coupled in series in the circuit topology shown in FIG. 5 is located at the center of the pass band of the filter. To analyze the mechanism that generates the transmission zero point, the input admittance Y _in is first calculated.

Here, the input impedance Z _in is as follows.

When Y _in approaches infinity, that is, when Z _in approaches 0 (Z _in =0), a transmission zero point is generated. If Y _in is equal to 0, a reflection zero point is generated. In this case, the acquired transmission zero point _Sz is
And the reflection zero point S _p is,
S _p =-jb ₂ .

In the above formula, b ₁ is the frequency coefficient of external dielectric resonator 1, b ₂ is the frequency coefficient of external dielectric resonator 2, j is the imaginary unit of complex number, and J ₁ is the frequency coefficient of external dielectric resonator 2. J2 is the coupling coefficient between the resonator 1 and the input port 10, and _J2 is the coupling coefficient between the external dielectric resonator 1 and the external dielectric resonator 2.

Therefore, when the transmission zero points are distributed symmetrically, both external dielectric resonator 1 and external dielectric resonator 2 resonate at the center frequency, and b ₁ =b ₂ =0. In this case, S _z =±jJ ₂ and S _p =0.

Based on the above analysis, the following conclusions can be drawn.

(1) A pair of out-of-band transmission zeros may be implemented for the topology structure, where the pair of out-of-band transmission zeros may be symmetrical transmission zeros distributed symmetrically on either side of the passband, or symmetrical transmission zeros on either side of the passband. It may also be an asymmetric transmission zero point located.

(2) _J2 can affect the location of the transmission zero point.

(3) _J1 only provides coupling and does not affect the location of the transmission zero point.

If the transmission zero points are symmetrically distributed on both sides of the passband, external dielectric resonator 1 and external dielectric resonator 2 result in two reflection zero points located at the center frequency.

In this embodiment of the present application, the included angle between the first line and the second line is greater than or equal to 90°, and/or the included angle between the third line and the fourth line is 90°. ° or more.

The first line is a line connecting the center of the external dielectric resonator and the center of the input port. The second line is a line connecting the center of the input port and the center of the internal dielectric resonator closest to the input port. The third line is a line connecting the center of the output port and the center of the external dielectric resonator. The fourth line is a line connecting the center of the output port and the center of the internal dielectric resonator closest to the output port.

By setting the included angle between the first line and the second line to 90° or more, the internal dielectric resonator and the external dielectric resonator are respectively arranged on both sides of the input port. Become. In this embodiment of the present application, the side on which the internal dielectric resonator is arranged is defined as the inside of the input port, and the other side is defined as the outside of the input port. The boundary line between the inside and outside of the input port is a straight line passing through the center of the input port and perpendicular to the second line. The center of the external dielectric resonator may be located on the boundary line or outside the input port. By configuring the position of the external dielectric resonator, the external dielectric resonator will always pass through the input port when directly coupled to the internal dielectric resonator, and the cascade-coupled resonator in the main coupling channel will Become a part. In this way, the wave transmission path passes through the input port and reaches the external dielectric resonator, where a transmission zero point is generated.

By setting the included angle between the third line and the fourth line to 90° or more, the internal dielectric resonator and the external dielectric resonator are arranged on both sides of the output port, respectively. Become. In this embodiment of the present application, the side on which the internal dielectric resonator is arranged is defined as the inside of the output port, and the other side is defined as the outside of the output port. The boundary line between the inside and outside of the output port is a straight line passing through the center of the output port and perpendicular to the fourth line. The center of the external dielectric resonator may be located on the boundary line or outside the output port. By configuring the position of the external dielectric resonator, the external dielectric resonator will always pass through the output port when directly coupled to the internal dielectric resonator, and the cascade-coupled resonator in the main coupling channel will Become a part. In this way, the wave transmission path passes through the output port and reaches the external dielectric resonator, where a transmission zero point is created.

In this embodiment of the present application, two external dielectric resonators are coupled, an external dielectric resonator proximate to input port 10 or output port 20 being coupled to input port 10 or output port 20. . It will be appreciated that one of the external dielectric resonators is coupled to the input port 10 or the output port 20 via a cascade coupling. Such a design follows the rationale for obtaining the transmission zero point described above and facilitates the acquisition of the transmission zero point.

In this embodiment, an external dielectric resonator and an external dielectric resonator are arranged outside the input port 10, and an external dielectric resonator and an external dielectric resonator are arranged outside the output port 20. There is. Therefore, for ease of description and identification, the external dielectric resonator that is close to and outside the input port 10 will be referred to as external dielectric resonator A31; The other external dielectric resonator is referred to as an external dielectric resonator A32, the external dielectric resonator outside the output port 20 and close to the output port 20 is referred to as an external dielectric resonator B21, The other external dielectric resonator outside the output port 20 and close to the output port 20 is referred to as external dielectric resonator B22.

In this embodiment of the present application, the cascaded resonators of the main coupling channel include a cascaded resonator with a linear topology structure and a cascaded resonator with a staggered topology structure. When using a cascade-coupled resonator with a linear topology structure, the structural design of the dielectric filter can be simplified by arranging multiple internal dielectric resonators in a straight line, making the structure simple and making the dielectric filter easier to place. When using cascade-coupled resonators with a staggered topology structure, cross-coupling formed by adjacent inner dielectric resonators results in cross-coupling, which facilitates the implementation of the transmission zero point function in the dielectric filter. become. In addition, the transmission zero point obtained by arranging the external dielectric resonator contributes to improving the out-of-band rejection performance of the dielectric filter.

Next, specific arrangements of the cascade coupled resonators having a linear topology structure and the cascade coupling resonators having a staggered topology structure will be individually explained.

Example 1
In this embodiment, reference is made to FIGS. 2 and 3. FIG. 2 is a second schematic diagram of a dielectric filter according to an embodiment of the present application. FIG. 3 is a schematic diagram of the topological structure of the dielectric filter shown in FIG. 2. As shown in FIGS. 2 and 3, a plurality of internal dielectric resonators are arranged between the input port 10 and the output port 20. The plurality of internal dielectric resonators are arranged in a straight line, and the input port 10 and the output port 20 are also arranged in a straight line. In this embodiment, a total of four internal dielectric resonators are arranged. An internal dielectric resonator 11 is coupled to input port 10 . An internal dielectric resonator 12 is coupled to internal dielectric resonator 11 . An internal dielectric resonator 13 is coupled to internal dielectric resonator 12 . An internal dielectric resonator 14 is coupled to internal dielectric resonator 13 . Output port 20 is coupled to internal dielectric resonator 14 . In this case, a linear main coupling channel is formed. A high frequency signal is transmitted from input port 10 to output port 20 along the main coupling channel. As shown in FIG. 2, two external dielectric resonators, an external dielectric resonator B21 and an external dielectric resonator B22, are arranged outside the output port 20. External dielectric resonator B21 is coupled to output port 20. External dielectric resonator B22 is coupled to external dielectric resonator B21. The external dielectric resonator B21 and the external dielectric resonator B22 may be arranged on the straight line on which the four internal dielectric resonators are arranged. In this arrangement, cross-coupling between the internal dielectric resonators is not taken into account, so the structure of the dielectric filter is simple, which facilitates manufacturing and is convenient for mass production.

Example 2
In this embodiment, reference is made to FIGS. 1 and 3. FIG. 1 is a first schematic diagram of a dielectric filter according to an embodiment of the present application. FIG. 3 is a schematic diagram of the topological structure of the dielectric filter shown in FIG. As shown in FIGS. 1 and 3, a plurality of internal dielectric resonators may be arranged between the input port 10 and the output port 20, and the plurality of internal dielectric resonators are arranged in a plurality of rows. Good too. By applying this arrangement, it becomes easy to arrange the dielectric filter, and the space in the longitudinal direction of the dielectric filter can be utilized to the maximum. On the other hand, the plurality of internal dielectric resonators form only one main coupling channel. In this embodiment, a total of four internal dielectric resonators are arranged in two rows, and each row includes two internal dielectric resonators. As shown in FIG. 1, four internal dielectric resonators are arranged at each of the four corners of a rectangle. Naturally, the arrangement of the plurality of internal dielectric resonators is not limited to this. An internal dielectric resonator 11 is coupled to input port 10 . An internal dielectric resonator 12 is coupled to internal dielectric resonator 11 . An internal dielectric resonator 13 is coupled to internal dielectric resonator 12 . An internal dielectric resonator 14 is coupled to internal dielectric resonator 13 . Output port 20 is coupled to internal dielectric resonator 14 . In this case, a "U" shaped main coupling channel is formed. A high frequency signal is transmitted from input port 10 to output port 20 along the main coupling channel. As shown in FIG. 1, two external dielectric resonators, an external dielectric resonator B21 and an external dielectric resonator B22, are arranged outside the output port 20. External dielectric resonator B21 is coupled to output port 20. External dielectric resonator B22 is coupled to external dielectric resonator B21. The arrangement of the external dielectric resonator B21 and the external dielectric resonator B22 may be based on the structure of the dielectric filter. In this example, the arrangement of the two external dielectric resonators is similar to the longitudinal arrangement of the internal dielectric resonators. The arrangement of this embodiment makes maximum use of the space of the dielectric filter.

The two external dielectric resonators are placed outside the output port 20 so that two transmission zero points are generated, resulting in a good out-of-band rejection effect. Please refer to FIG. 4. FIG. 4 is a response curve of the dielectric filter shown in FIG. As shown in FIG. 4, there are a total of two curves in the diagram. The curve S11 is a signal reflection curve for signal transmission in the dielectric filter in this embodiment, and the curve S21 is a signal transmission curve for signal transmission in the dielectric filter in this embodiment. In this example, the central part of the curve S11 with relatively small fluctuations represents the passband of the cascade coupled resonator of the main coupling channel in the dielectric filter. The two breakpoints on S21 represent two transmission zeros, and these two transmission zeros are distributed on either side of the passband.

Example 3
In this embodiment, reference is made to FIGS. 7 and 8. FIG. 7 is a third schematic diagram of a dielectric filter according to an embodiment of the present application. FIG. 8 is a schematic diagram of the topological structure of the dielectric filter shown in FIG. 7. As shown in FIGS. 7 and 8, a plurality of internal dielectric resonators may be arranged between the input port 10 and the output port 20. The arrangement of the plurality of internal dielectric resonators in this example is similar to the arrangement of the internal dielectric resonators in Example 2, so the details will not be described again here. For details, please refer to the explanation regarding the arrangement of the internal dielectric resonators in Example 2. The four internal dielectric resonators form a "U" shaped main coupling channel along which a high frequency signal is transmitted from input port 10 to output port 20. As shown in FIGS. 7 and 8, two external dielectric resonators, an external dielectric resonator A31 and an external dielectric resonator A32, are arranged outside the input port 10. External dielectric resonator A31 is coupled to input port 10, and external dielectric resonator A32 is coupled to external dielectric resonator A31. Two external dielectric resonators, an external dielectric resonator B21 and an external dielectric resonator B22, are arranged outside the output port 20. External dielectric resonator B21 is coupled to output port 20, and external dielectric resonator B22 is coupled to external dielectric resonator B21. The arrangement of the two external dielectric resonators at the input port 10 may be the same as the arrangement of the two external dielectric resonators at the output port 20. For details, please refer to the arrangement of two external dielectric resonators outside the output port 20 in Example 2.

Two external dielectric resonators are placed outside the input port 10 and two external dielectric resonators are placed outside the output port 20, so that four transmission zero points are generated, A good out-of-band removal effect can be obtained. Please refer to FIG. 9. FIG. 9 is a response curve of the dielectric filter shown in FIG. As shown in FIG. 9, there are a total of two curves in the diagram. The curve S11 is a reflection curve of signal transmission in the dielectric filter in this embodiment, and the curve S21 is a transmission curve of signal transmission in the dielectric filter in this embodiment. In this example, the central part of the curve S11 with relatively small fluctuations represents the passband of the cascade coupled resonator of the main coupling channel in the dielectric filter. S21 has a total of four breakpoints, each of which represents a transmission zero point. The four breakpoints are generally symmetrically distributed on either side of the passband.

Example 4
In this example, FIG. 20 and FIG. 21 are referred to. FIG. 20 is a fourth schematic diagram of a dielectric filter according to an embodiment of the present application. FIG. 21 is a schematic diagram of the topological structure of the dielectric filter shown in FIG. 20. As shown in FIGS. 20 and 21, a plurality of internal dielectric resonators are arranged between the input port 10 and the output port 20, and the plurality of internal dielectric resonators are arranged in a staggered manner. Note that the solid line between the internal dielectric resonators in FIG. 21 represents the main coupling channel, and the broken line indicates that the internal dielectric resonators at both ends of the broken line are coupled, or The dielectric resonator is also shown coupled to an external dielectric resonator at the other end. An explanation will be given using the internal dielectric resonator 11, the internal dielectric resonator 12, and the internal dielectric resonator 13 as examples.

The coupling path between the internal dielectric resonator 11 and the internal dielectric resonator 12 and the coupling path between the internal dielectric resonator 12 and the internal dielectric resonator 13 are part of the main coupling channel. be. In FIG. 21, the aforementioned coupling paths are shown as solid lines. Internal dielectric resonator 11 and internal dielectric resonator 13 are also coupled. The coupling path between the internal dielectric resonator 11 and the internal dielectric resonator 13 is not part of the main coupling channel and is therefore shown as a dashed line. In this way, internal dielectric resonator 11, internal dielectric resonator 12, and internal dielectric resonator 13 are cross-coupled.

In this embodiment, a total of five internal dielectric resonators are arranged. Internal dielectric resonator 11 is coupled to input port 10 . Internal dielectric resonator 12 is coupled to internal dielectric resonator 11 . Internal dielectric resonator 13 is coupled to internal dielectric resonator 12 . An internal dielectric resonator 14 is coupled to internal dielectric resonator 13 . An internal dielectric resonator 15 is coupled to internal dielectric resonator 14 . Output port 20 is coupled to internal dielectric resonator 15 . Five internal dielectric resonators are staggered to form a polyline main coupling channel. The path of the main binding channel may be the curve of FIG. 20. The arrow at the end of the curve indicates the transmission path of the high frequency signal. A high frequency signal is transmitted from input port 10 to output port 20 along the main coupling channel.

As shown in FIG. 20, two external dielectric resonators, an external dielectric resonator B21 and an external dielectric resonator B22, are arranged outside the output port 20. External dielectric resonator B21 is coupled to output port 20. External dielectric resonator B22 is coupled to external dielectric resonator B21. External dielectric resonator B22 may be further coupled to internal dielectric resonator 15. The placement design of the two external dielectric resonators depends on the design requirements of the dielectric filter. In this embodiment, the two external dielectric resonators are arranged based on the arrangement of the internal dielectric resonator, and the arrangement of the two external dielectric resonators is such that the internal dielectric resonator 14 and the internal dielectric resonator The arrangement is the same as that of the container 15. If a staggered topology structure of cascade-coupled resonators is used, cross-coupling may be created when the internal dielectric resonators form the main coupling channel. Cross-coupling is useful in implementing the transmission zero function of a dielectric filter, and the out-of-band rejection performance of the dielectric filter is enhanced by the transmission zero created by two external dielectric resonators.

Example 5
In this embodiment, reference is made to FIGS. 22 and 23. FIG. 22 is a fifth schematic diagram of a dielectric filter according to an embodiment of the present application. FIG. 23 is a schematic diagram of the topological structure of the dielectric filter shown in FIG. 22. As shown in FIGS. 22 and 23, a plurality of internal dielectric resonators are arranged between the input port 10 and the output port 20, and these plural internal dielectric resonators are arranged in a staggered manner.

In this embodiment, a total of three internal dielectric resonators are arranged. An internal dielectric resonator 11 is coupled to input port 10 . An internal dielectric resonator 12 is coupled to internal dielectric resonator 11 . An internal dielectric resonator 13 is coupled to internal dielectric resonator 12 . Output port 20 is coupled to internal dielectric resonator 13 . In this case, three internal dielectric resonators are staggered to form a polyline main coupling channel. A high frequency signal is transmitted from input port 10 to output port 20 along the main coupling channel.

As shown in FIG. 22, two external dielectric resonators, an external dielectric resonator A31 and an external dielectric resonator A32, are arranged outside the input port 10. External dielectric resonator A31 is coupled to output port 20. External dielectric resonator A32 is coupled to external dielectric resonator A31. The external dielectric resonator A32 may be further coupled to the internal dielectric resonator 11. Two external dielectric resonators, an external dielectric resonator B21 and an external dielectric resonator B22, are arranged outside the output port 20. External dielectric resonator B21 is coupled to output port 20. External dielectric resonator B22 is coupled to external dielectric resonator B21. External dielectric resonator B22 may be further coupled to internal dielectric resonator 13.

The placement design of the two external dielectric resonators outside each port depends on the design requirements of the dielectric filter. In this embodiment, the external dielectric resonator A31 and the external dielectric resonator A32 are arranged based on the arrangement of the internal dielectric resonator 11 and the internal dielectric resonator 12. The external dielectric resonator B21 and the external dielectric resonator B22 are arranged based on the arrangement of the internal dielectric resonator 13 and the internal dielectric resonator 12. In this embodiment, two external dielectric resonators are placed at both the outer end of the input port 10 and the outer end of the output port 20, so that four transmission zero points can be generated, which provides a better Out-of-band rejection performance is provided.

When the cascade coupled resonators of the main coupling channel are arranged non-linearly, a coupling groove 30 is arranged between two adjacent internal dielectric resonators. As shown in FIGS. 1, 7, 20, and 22, by arranging coupling grooves 30, the amount of dielectric between two adjacent internal dielectric resonators may be controlled. The amount of dielectric can be controlled by controlling the size of the coupling groove 30, where the amount of coupling between the two internal dielectric resonators can be controlled. By controlling the amount of coupling between the internal dielectric resonators, the formation of the main coupling channel is controlled. The cascade coupled resonators of the main coupling channel may be of different forms. In practical applications, the arrangement of the cascade-coupled resonators in the main coupling channel may be flexibly adjusted, making it easier overall to arrange the dielectric filter.

The shape of the coupling groove 30 is related to the amount of coupling between internal dielectric resonators in the cascade coupled resonator of the staggered topology structure. The coupling groove 30 may be used to control the amount of coupling between two internal dielectric resonators by controlling the amount of dielectric between the two internal dielectric resonators, so that the individual internal dielectric The amount of dielectric between the resonators may be determined by setting the amount of coupling between the two internal dielectric resonators, and thereby the corresponding shape of the coupling groove 30 may be determined.

In this embodiment of the present application, the external dielectric resonator includes a resonator body formed by a portion of the dielectric and a debug hole located in the resonator body. A debug hole is a blind hole or a through hole. The resonator main body of this embodiment is a part of a dielectric material, and the debug hole is set as a blind hole or a through hole. By setting the depth of the debug hole, the frequency of the external dielectric resonator may be adjusted. Specifically, whether the external dielectric resonator is a blind hole or a through hole is flexibly determined by the design requirements of the dielectric filter. In this way, design freedom can be maintained.

In this embodiment of the present application, external dielectric resonator A32 or external dielectric resonator B22 is coupled to an internal dielectric resonator near the port. The internal dielectric resonator near the port is an internal dielectric resonator adjacent to the port on the side where the external dielectric resonator A32 or the external dielectric resonator B22 is arranged. The port on the side where the external dielectric resonator A32 or the external dielectric resonator B22 is arranged may be the input port 10 or the output port 20, and this is specifically at the position of the external dielectric resonator. Dependent. For example, when the external dielectric resonator A32 is arranged only on the input port 10 side, that port is the input port 10. When the external dielectric resonator B22 is arranged only on the output port 20 side, that port is the output port 20. When external dielectric resonator A32 and external dielectric resonator B22 are arranged at both input port 10 and output port 20, the ports include input port 10 and output port 20.

External dielectric resonator A32 or external dielectric resonator B22 is coupled to input port 10 or output port 20. The input port 10 is coupled to an internal dielectric resonator adjacent to the input port 10 (the first internal dielectric resonator in the cascade coupled resonator of the main coupling channel). Output port 20 is coupled to an internal dielectric resonator adjacent to output port 20 (the last internal dielectric resonator in the cascade coupled resonator of the main coupling channel). Therefore, the arrangement of the filter topology may be a staggered arrangement. Specifically, the two external dielectric resonators and the internal dielectric resonator near the port are arranged in a triangular shape. With this arrangement, cross-coupling is more likely to occur between the two external dielectric resonators and the internal dielectric resonator near the port, resulting in better out-of-band rejection.

Example 1
As shown in FIG. 20, two external dielectric resonators are arranged outside the output port 20. External dielectric resonator B21 is coupled to output port 20. External dielectric resonator B22 is coupled to external dielectric resonator B21. Output port 20 is coupled to internal dielectric resonator 15 . In this case, the internal dielectric resonator 15 is an internal dielectric resonator near the port. External dielectric resonator B22 is coupled to internal dielectric resonator 15. Cross-coupling may be generated between the external dielectric resonator B21, the external dielectric resonator B22, and the internal dielectric resonator 15, thereby providing a better out-of-band rejection effect.

Example 2
As shown in FIG. 22, two external dielectric resonators are arranged on both sides of the input port 10 and the output port 20. An external dielectric resonator A31 outside the input port 10 is coupled to the input port 10. External dielectric resonator A32 is coupled to external dielectric resonator A31. Input port 10 is coupled to internal dielectric resonator 11 . Internal dielectric resonator 11 is an internal dielectric resonator near the input port 10 . An external dielectric resonator B21 outside the output port 20 is coupled to the output port 20. External dielectric resonator B22 is coupled to external dielectric resonator B21. Output port 20 is coupled to internal dielectric resonator 13 . In this case, the internal dielectric resonator 13 is an internal dielectric resonator near the output port 20 . Cross-coupling is generated between the external dielectric resonator A31, the external dielectric resonator A32, and the internal dielectric resonator 11. Cross-coupling is generated between the external dielectric resonator B21, the external dielectric resonator B22, and the internal dielectric resonator 13. Since cross-coupling is generated on both ports, better out-of-band rejection is obtained.

In this embodiment of the present application, the coupling hole 50 and/or the coupling groove 40 are arranged between the internal dielectric resonator adjacent to the input port 10 and the external dielectric resonator A31 adjacent to the input port 10. The coupling hole 50 and/or the coupling groove 40 are arranged between the internal dielectric resonator B21 adjacent to the output port 20 and the external dielectric resonator B21 adjacent to the output port 20.

When the coupling hole 50 or coupling groove 40 is arranged, the arranged coupling hole 50 or coupling groove 40 is used to connect the input port 10 and the internal dielectric resonator and external dielectric resonator arranged on both sides of the input port 10. The amount of coupling with the body resonator A31 may be adjusted, or the amount of coupling between the output port 20 and the internal dielectric resonator and external dielectric resonator B21 arranged on both sides of the output port 20 may be adjusted. Good too. The coupling hole 50 and the coupling groove 40 are different types of mechanisms for adjusting the amount of coupling between the input port 10 or the output port 20 and the internal dielectric resonator and the external dielectric resonator. In actual application, the corresponding coupling hole 50 or coupling groove 40 may be designed according to the requirements of the coupling amount between the input port 10 or the output port 20 and the internal dielectric resonator and the external dielectric resonator. By using the coupling hole 50 and the coupling groove 40 together, various designs and flexible adjustments to the amount of coupling between the internal dielectric resonator and the external dielectric resonator may be implemented.

In this embodiment of the present application, the coupling hole 50 is a blind hole or a through hole, and the coupling groove 40 is a blind groove. The coupling hole 50 is configured as a through hole or a blind hole. The effect of adjusting the amount of coupling between the input port 10 or the output port 20 and the dielectric resonator of the corresponding port by using a through hole is different from the effect brought about by using a blind hole. Whether the coupling hole 50 is a through hole or a blind hole depends on the requirements for adjusting the amount of coupling. In this way, the amount of coupling between the input port 10 or output port 20 and each dielectric resonator can be adjusted more easily. This simple adjustment method facilitates manufacturing and processing of dielectric filters.

Next, the arrangement and combination of the coupling hole 50 and the coupling groove 40 will be described with reference to FIGS. 10 to 18.

Example 1
Coupling groove 40 is disposed between an internal dielectric resonator adjacent to input port 10 and an external dielectric resonator, or coupling groove 40 is disposed between an internal dielectric resonator adjacent to output port 20 and an external dielectric resonator. It is placed between the dielectric resonator and the dielectric resonator. The coupling groove 40 does not communicate with either the internal dielectric resonator disposed at one end of the coupling groove 40 or the external dielectric resonator disposed at the other end of the coupling groove 40 .

The inner dielectric resonator and the outer dielectric resonator are both adjacent to input port 10 or both are adjacent to output port 20. Since the coupling groove 40 is designed so as not to communicate with either the internal dielectric resonator or the external dielectric resonator, the amount of coupling between the input port 10 and the internal dielectric resonator and the amount of coupling between the input port 10 and the external dielectric resonator are The amount of coupling with the resonator may be reduced, and/or the amount of coupling between the output port 20 and the internal dielectric resonator and the amount of coupling between the output port 20 and the external dielectric resonator may be reduced.

An example in which a coupling groove 40 is disposed between an internal dielectric resonator and an external dielectric resonator adjacent to the input port 10 will be explained. See FIGS. 10 and 11. FIG. 10 is a first schematic diagram showing coupling of an input port to an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. FIG. 11 is a cross-sectional view of a first schematic diagram showing the coupling of the port of FIG. 10 to an internal dielectric resonator and an external dielectric resonator. As shown in FIGS. 10 and 11, the internal dielectric resonator adjacent to the input port 10 is the internal dielectric resonator 11, and the external dielectric resonator adjacent to the input port 10 is the external dielectric resonator A31. Yes, the coupling groove 40 is arranged between the internal dielectric resonator 11 and the external dielectric resonator A31, and the coupling groove 40, the internal dielectric resonator 11, and the external dielectric resonator A31 are in communication. I haven't. By adjusting the size of the coupling groove 40, for example, by adjusting the depth, length, or width of the coupling groove 40, the amount of coupling between the input port 10 and the internal dielectric resonator 11 and the input port 10 can be adjusted. and the amount of coupling between the external dielectric resonator and the external dielectric resonator may be adjusted.

Example 2
Coupling groove 40 is disposed between an internal dielectric resonator adjacent to input port 10 and an external dielectric resonator, or coupling groove 40 is disposed between an internal dielectric resonator adjacent to output port 20 and an external dielectric resonator. one end of the coupling groove 40 is in communication with the internal dielectric resonator disposed at one end of the coupling groove 40, or is disposed at the other end of the coupling groove 40. It communicates with an external dielectric resonator.

An example in which a coupling groove 40 is disposed between an internal dielectric resonator and an external dielectric resonator adjacent to the input port 10 will be explained. See FIGS. 12 and 13. FIG. 12 is a second schematic diagram showing coupling of an input port to an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. FIG. 13 is a cross-sectional view of a second schematic diagram showing the coupling of the port of FIG. 12 to an internal dielectric resonator and an external dielectric resonator. As shown in FIGS. 12 and 13, the internal dielectric resonator adjacent to the input port 10 is the internal dielectric resonator 11, and the external dielectric resonator adjacent to the input port 10 is the external dielectric resonator A31. The coupling groove 40 is arranged between the internal dielectric resonator 11 and the external dielectric resonator A31. The coupling groove 40 does not communicate with the internal dielectric resonator 11, while the coupling groove 40 communicates with the external dielectric resonator A31. Alternatively, the coupling groove 40 communicates with the internal dielectric resonator 11, while the coupling groove 40 does not communicate with the external dielectric resonator A31 (not shown in this case). In actual application, the communication relationship between the coupling groove 40 and the internal dielectric resonator 11 and the external dielectric resonator A31 is determined by the amount of coupling between the input port 10 and the internal dielectric resonator 11 and the external dielectric resonator A31. may be adjusted according to specific requirements, such as adjusting the In the example shown in FIG. 12, the coupling groove 40 does not communicate with the internal dielectric resonator 11, while the coupling groove 40 communicates with the external dielectric resonator A31. When the distance between the input port 10 and the internal dielectric resonator 11 is equal to the distance between the input port 10 and the external dielectric resonator A31, the amount of coupling between the input port 10 and the external dielectric resonator A31 is , is larger than the amount of coupling between the input port 10 and the internal dielectric resonator 11. Furthermore, by adjusting the distance between the coupling groove 40 and the internal dielectric resonator 11, the amount of coupling between the input port 10 and the internal dielectric resonator 11 may be adjusted. Alternatively, by adjusting the depth and width of the coupling groove 40, the amount of coupling between the input port 10 and the internal dielectric resonator 11 and the amount of coupling between the input port 10 and the external dielectric resonator A31 can be adjusted. You can. Adjusting the amount of coupling between a port and a corresponding dielectric resonator by adjusting the size of the coupling groove 40 belongs to the prior art and will not be described in detail here.

Both the internal dielectric resonator 11 and the external dielectric resonator A31 are adjacent to the input port 10, and one end of the coupling groove 40 is set to communicate with the dielectric resonator 11, so that the input port 10 The amount of coupling between the internal dielectric resonator 11 and the internal dielectric resonator 11 may become large. Alternatively, by setting one end of the coupling groove 40 to communicate with the external dielectric resonator A31, the amount of coupling between the input port 10 and the external dielectric resonator A31 can be increased. In this way, the amount of coupling between the input port 10 on the dielectric resonator and the internal dielectric resonator 11 or the external dielectric resonator can be adjusted. In this embodiment, input port 10 is used only as an illustrative example. Input ports 10 may be replaced by corresponding output ports 20. In this case, internal dielectric resonator 11 corresponds to the internal dielectric resonator adjacent to output port 20 . External dielectric resonator A31 corresponds to an external dielectric resonator adjacent to output port 20.

Example 3
Coupling groove 40 is disposed between an internal dielectric resonator adjacent to input port 10 and an external dielectric resonator, or coupling groove 40 is disposed between an internal dielectric resonator adjacent to output port 20 and an external dielectric resonator. Both ends of the coupling groove 40 are arranged between an internal dielectric resonator disposed at one end of the coupling groove 40 and an external dielectric disposed at the other end of the coupling groove 40. It communicates with the resonator.

An example in which a coupling groove 40 is disposed between an internal dielectric resonator and an external dielectric resonator adjacent to the input port 10 will be explained. Please refer to FIGS. 14 and 15. FIG. 14 is a third schematic diagram showing coupling of an input port to an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. FIG. 15 is a cross-sectional view of a third schematic diagram illustrating the coupling of the port of FIG. 14 to an internal dielectric resonator and an external dielectric resonator. As shown in FIGS. 14 and 15, the internal dielectric resonator adjacent to the input port 10 is the internal dielectric resonator 11, and the external dielectric resonator adjacent to the input port 10 is the external dielectric resonator A31. The coupling groove 40 is arranged between the internal dielectric resonator 11 and the external dielectric resonator A31. The coupling groove 40 communicates with both the internal dielectric resonator 11 and the external dielectric resonator A31. If the same arrangement of input port 10, internal dielectric resonator 11 and external dielectric resonator A31 is applied, and coupling groove 40 communicates with both internal dielectric resonator 11 and external dielectric resonator A31. , the amount of coupling between the input port 10, the internal dielectric resonator 11, and the external dielectric resonator A31 is greater than the amount of coupling performed when the coupling groove 40 is not communicating with either the internal dielectric resonator 11 or the external dielectric resonator A31. The amount of binding with A31 increases. That is, the amount of coupling between input port 10, internal dielectric resonator 11, and external dielectric resonator A31 in the case shown in FIG. This is larger than the amount of coupling with the body resonator A31. In this embodiment, by adjusting the depth and width of the coupling groove 40, the amount of coupling between the input port 10 and the internal dielectric resonator 11 and the amount of coupling between the input port 10 and the external dielectric resonator A31 can be adjusted. may be adjusted.

Both ends of the coupling groove 40 are set to communicate with the internal dielectric resonator 11 and the external dielectric resonator A31. In this case, the amount of coupling between the input port 10 and the internal dielectric resonator 11 and the amount of coupling between the input port 10 and the external dielectric resonator A31 may become large.

In addition, a coupling hole 50 may further be disposed between the internal dielectric resonator and the external dielectric resonator adjacent to the input port 10 or the output port 20, and the axis of the coupling hole 50 and the internal dielectric resonance The axis of the device and the axis of the external dielectric resonator are parallel to each other.

Example 4
Please refer to FIG. 16. FIG. 16 is a fourth schematic diagram showing coupling of an input port to an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. As shown in FIG. 16, the internal dielectric resonator adjacent to the input port 10 is the internal dielectric resonator 11, the external dielectric resonator adjacent to the input port 10 is the external dielectric resonator A31, and the internal dielectric resonator is the internal dielectric resonator A31. A coupling hole 50 is arranged between the dielectric resonator 11 and the external dielectric resonator A31. In this embodiment, two coupling holes 50 are arranged. The axes of the two coupling holes 50 are parallel to the axis of the internal dielectric resonator 11 and the axis of the external dielectric resonator A31. Alternatively, the axes of the two coupling holes 50, the axis of the internal dielectric resonator 11, and the axis of the external dielectric resonator A31 may be arranged in the same plane. The two coupling holes 50 are arranged on both sides of the input port 10, respectively. The coupling hole 50 may be a through hole or a blind hole, or a combination of a through hole and a blind hole. By adjusting the position of the coupling hole 50 between the input port 10 and the internal dielectric resonator 11, the amount of coupling between the input port 10 and the internal dielectric resonator 11 may be adjusted. Further, the amount of coupling between the input port 10 and the external dielectric resonator A31 may be adjusted by adjusting the position of the coupling hole 50 between the input port 10 and the external dielectric resonator A31.

Please refer to FIG. 17. For example, FIG. 17 is a fifth schematic diagram illustrating coupling of an input port to an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. As shown in FIG. 17, the axes of the two coupling holes 50 are parallel to the axis of the internal dielectric resonator 11 and the axis of the external dielectric resonator A31. However, the plane where the axis of the internal dielectric resonator 11 and the axis of the external dielectric resonator A31 are located is perpendicular to the plane where the axes of the two coupling holes 50 are located, and the two coupling holes 50 are They are arranged on both sides of the plane in which the axis of the internal dielectric resonator 11 and the axis of the external dielectric resonator A31 are located. In actual application, the specific position of the coupling hole 50 depends on the amount of coupling between the input port 10 and the internal dielectric resonator 11, and the amount of coupling between the input port 10 and the external dielectric resonator A31. .

Further, the positions of the two coupling holes 50 are set as shown in FIG. are placed on both sides of the plane where they are located. Unlike the state shown in FIG. 16 in which the axes of the two coupling holes 50 are located within the plane in which the axis of the internal dielectric resonator 11 and the axis of the external dielectric resonator A31 are located, the coupling holes are located on both sides of the plane. 50, parasitic coupling occurring between the internal dielectric resonator 11 and the external dielectric resonator A31 can be suppressed. In this way, interference caused by coupling parasitic to the implementation of the transmission zero point may be reduced.

In this case, manufacturing and processing may be facilitated by setting the axis of the coupling hole 50 parallel to the axis of the internal dielectric resonator and the axis of the external dielectric resonator. In this embodiment, the coupling hole 50 may be a through hole or a blind hole, and the amount of coupling between the input port 10 and the internal dielectric resonator 11 and the amount of coupling between the input port 10 and the external dielectric resonator A31 are It may be configured to adjust.

Example 5
In addition to the cases shown in the previous embodiments, both the coupling groove 40 and the coupling hole 50 are arranged between the inner dielectric resonator and the outer dielectric resonator adjacent the input port 10 or the output port 20. may be done.

An example will be described in which both the coupling groove 40 and the coupling hole 50 are arranged between the internal dielectric resonator and the external dielectric resonator adjacent to the input port 10. See FIGS. 18 and 19. FIG. 18 is a sixth schematic diagram showing coupling of an input port to an internal dielectric resonator and an external dielectric resonator in a dielectric filter according to an embodiment of the present application. FIG. 19 is a cross-sectional view of a sixth schematic diagram showing the coupling of the port of FIG. 18 to an internal dielectric resonator and an external dielectric resonator. As shown in FIGS. 18 and 19, the internal dielectric resonator adjacent to the input port 10 is the internal dielectric resonator 11, and the external dielectric resonator adjacent to the input port 10 is the external dielectric resonator A31. Both the coupling groove 40 and the coupling hole 50 are arranged between the internal dielectric resonator 11 and the external dielectric resonator A31. In this embodiment, the coupling groove 40 is arranged on the side close to the external dielectric resonator A31, and the coupling hole 50 is arranged on the side close to the internal dielectric resonator 11. Note that the positions of the coupling groove 40 and the coupling hole 50 are not limited to this. It may be adjusted based on the amount of coupling between the input port 10 and the external dielectric resonator A31 and the amount of coupling between the input port 10 and the internal dielectric resonator 11. In this embodiment, a configuration is used in which the coupling groove 40 communicates with the external dielectric resonator A31. Alternatively, the coupling groove 40 may be set not to communicate with the external dielectric resonator A31 based on the amount of coupling between the input port 10 and the external dielectric resonator A31. For ease of manufacturing and processing, the axes of the coupling holes 50 may be set vertically, and one or more coupling holes 50 may be configured based on the amount of coupling between the input port 10 and the internal dielectric resonator 11. may be configured.

In this embodiment, the input port 10 includes a connector 101 and a through hole 100. The connector 101 is coupled to a dielectric, and the through hole 100 is a through hole that passes through the connector 101 and the dielectric. When the connector 101 has a uniform shape, the axis of the through hole 100 may pass through the center of the connector 101 when the through hole 100 is arranged. In a situation where the coupling groove 40 is disposed between the internal dielectric resonator and the external dielectric resonator adjacent to the input port 10, the through hole 100 communicates with the coupling groove 40 when the through hole 100 is disposed. You can.

In the above embodiment, only the case where the coupling groove 40 and/or the coupling hole 50 are arranged between the internal dielectric resonator 11 and the external dielectric resonator A31 in the input port 10 has been described. In practical applications, the corresponding internal dielectric resonator and the corresponding external dielectric resonator may be placed at either the input port 10 or the output port 20, and the coupling groove 40 and/or the coupling hole 50 are , disposed between the internal dielectric resonator and the external dielectric resonator. The coupling groove 40 and/or the coupling hole 50 may be arranged in the form shown in the embodiments described above. If the coupling groove 40 and/or the coupling hole 50 are arranged at the input port 10 and the coupling groove 40 and/or the coupling hole 50 are arranged at the output port 20, the arrangements of the embodiments described above may be combined. For example, only the coupling groove 40 is disposed at the input port 10, and the position of the coupling groove 40 is the position shown in Example 1, and only the coupling groove 40 is disposed at the output port 20, and the position of the coupling groove 40 is as shown in Example 1. is the position shown in Example 2. In another example, only the coupling hole 50 is arranged at the input port 10, the position of the coupling hole 50 is as shown in Example 4, and both the coupling groove 40 and the coupling hole 50 are arranged at the output port 20. The positions of the coupling groove 40 and the coupling hole 50 are as shown in Example 5. Not all combinations are described herein by way of example.

In this embodiment of the present application, both the outer and inner surfaces of the dielectric are metallized. The inner surface of the dielectric includes all the inner surfaces of the through-hole, the inner surface and bottom surface of the blind hole, and the inner surface and bottom surface of the blind groove provided in the dielectric. Metal walls are formed on the outer and inner surfaces of the dielectric by metallizing both the outer and inner surfaces of the dielectric. By using a metal wall to completely enclose the dielectric, a resonant system is created in the dielectric.

Based on the same inventive concept, one embodiment of the present application provides a transceiver. The transceiver comprises a receiver, a transmitter, an amplification unit and a dielectric filter as provided in any one of the previous embodiments. The technical effect of the transceiver is the same as that of the dielectric filter provided in the previous embodiment, so the details will not be described again here.

Based on the same inventive concept, one embodiment of the present application provides a base station. The base station comprises an antenna feeder component, a control component, and a transceiver as provided in the previous embodiments. The technical effect of the base station is the same as that of the transceiver provided in the previous embodiments, so the details will not be described again here.

The foregoing descriptions are only specific embodiments of the present application and are not intended to limit the protection scope of the present application. Any variations or substitutions that are easily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

All embodiments herein are described step-by-step. Each embodiment focuses on differences from other embodiments. Cross-references may be made for the same or similar parts of the embodiments.

Although preferred embodiments of the embodiments of the present application have been described, those skilled in the art can make changes and modifications to these embodiments once they understand the basic inventive concept. Therefore, it is intended that the appended claims be construed to cover the preferred embodiments as well as all changes and modifications that fall within the scope of the embodiments of this application.

The dielectric filter, transceiver, and base station provided in this application have been described above in detail. This specification uses examples to explain the principles and implementations of the present application. The description of the foregoing embodiments is only used to help understand the methods and core concepts of the present application. In addition, those skilled in the art may make changes to the specific implementation and scope in accordance with the concepts of the present application. Accordingly, nothing herein should be construed as limiting the present application.

10 Input port 11, 12, 13, 14, 15 Internal dielectric resonator 20 Output port 21, 22 External dielectric resonator B
31, 32 External dielectric resonator A
30, 40 coupling groove 50 coupling hole 100 through hole 101 connector

Claims (16)

A dielectric filter comprising a dielectric, an input port, an output port, an internal dielectric resonator, and an external dielectric resonator arranged on the dielectric, between the input port and the output port. a plurality of internal dielectric resonators are arranged on one side of the input port to form a cascade-coupled resonator of the main coupling channel; two external dielectric resonators are arranged on one side of the input port; The amount of coupling between the body resonator and the input port is greater than the amount of coupling between the external dielectric resonator and either of the internal dielectric resonators, and/or two external dielectrics are provided on one side of the output port. a dielectric filter in which a resonator is arranged, the amount of coupling between the external dielectric resonator and the output port is greater than the amount of coupling between the external dielectric resonator and either of the internal dielectric resonators; . The included angle between the first line and the second line is 90° or more, and/or the included angle between the third line and the fourth line is 90° or more,
The first line is a line between the center of the external dielectric resonator and the center of the input port, and the second line is a line between the center of the internal dielectric resonator closest to the input port. a line between the center and the center of the input port;
The third line is a line between the center of the external dielectric resonator and the center of the output port, and the fourth line is a line between the center of the internal dielectric resonator closest to the output port. The dielectric filter according to claim 1, wherein the dielectric filter is a line between the center and the center of the output port. the two external dielectric resonators are coupled, one of the external dielectric resonators proximate to the input port or the output port being a first external dielectric resonator; The dielectric according to claim 1 or 2, wherein the external dielectric resonator is a second external dielectric resonator, and the first external dielectric resonator is coupled to the input port or the output port. filter. 4. A dielectric filter according to claim 1, wherein the cascaded resonators of the main coupling channel include cascaded resonators with a linear topology structure or cascaded resonators with a staggered topology structure. the external dielectric resonator includes a resonator body defined by a portion of the dielectric, and a debug hole disposed in the resonator body, the debug hole being a blind hole or a through hole; The dielectric filter according to claim 4. The second external dielectric resonator is coupled to an internal dielectric resonator near a port, and the internal dielectric resonator near the port is arranged with the second external dielectric resonator. 4. The dielectric filter of claim 3, wherein the dielectric filter is an internal dielectric resonator adjacent to the side port. A coupling hole and/or a coupling groove is arranged between the external dielectric resonator and the internal dielectric resonator near the port, and the internal dielectric resonator near the port is connected to the external dielectric resonator. 7. The dielectric filter according to claim 1, wherein the dielectric filter is an internal dielectric resonator adjacent to the port on which the filter is disposed. The dielectric filter according to claim 7, wherein the coupling hole is a blind hole or a through hole. The dielectric filter according to claim 7, wherein the coupling groove is a blind groove. The coupling groove is disposed between the internal dielectric resonator and the external dielectric resonator adjacent to the input port or the output port, and the coupling groove is disposed at one end of the coupling groove. The dielectric filter according to claim 7 , wherein the dielectric filter does not communicate with any of the internal dielectric resonator located at the other end of the coupling groove and the external dielectric resonator located at the other end of the coupling groove. . The coupling groove is disposed between the internal dielectric resonator and the external dielectric resonator adjacent to the input port or the output port, and one end of the coupling groove is connected to one end of the coupling groove. The dielectric filter according to any one of claims 7 to 9, communicating with the internal dielectric resonator located at the other end of the coupling groove or the external dielectric resonator located at the other end of the coupling groove. . A coupling groove is disposed between the inner dielectric resonator and the outer dielectric resonator adjacent to the input port or the output port, and two ends of the coupling groove are respectively connected to the inner dielectric resonator and the outer dielectric resonator. The dielectric according to any one of claims 7 to 9, communicating with the internal dielectric resonator located at one end or the external dielectric resonator located at the other end of the coupling groove. body filter. The coupling hole is arranged between the internal dielectric resonator and the external dielectric resonator adjacent to the input port or the output port, and the axis of the coupling hole and the internal dielectric resonator The dielectric filter according to any one of claims 7 to 12, wherein an axis of the external dielectric resonator and an axis of the external dielectric resonator are parallel to each other. 14. A dielectric filter according to any preceding claim, wherein both the outer and inner surfaces of the dielectric are metallized. A transceiver comprising a receiver, a transmitter, an amplification unit, and the dielectric filter according to any one of claims 1 to 14. A base station comprising an antenna feeder component, a control component, and a transceiver according to claim 15.

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