Resonator, filter and electronic device

Abstract

A resonator, a filter and an electronic device. The resonator comprises: a metal cavity, and a dielectric body and a metal step which are arranged in the metal cavity, wherein the dielectric body comprises a vertically penetrating dielectric through hole, the metal step comprises a vertically penetrating step through hole, a metal layer covers each surface of the dielectric body, a non-metal layer is arranged in the metal layer at the bottom of the dielectric body to serve as an open-circuit surface, another non-metal layer is arranged on the metal layer on an outer surface of the dielectric body to serve as a coupling window, and the metal layer thus divides the resonator into an inner part and an outer part. In the outer part, the metal cavity, the metal step and the metal layers together constitute a metal coaxial resonator; and in the inner part, the dielectric body, the dielectric through hole, the open-circuit surface and the metal layers together constitute a dielectric transverse electromagnetic mode resonator, thereby achieving one cavity with two modes, and the space utilization rate of the resonant cavity is doubled by means of the coupling of the coupling window, so as to reduce the required number of resonators and facilitate the cavity arrangement of the filter.

Description

Resonator, filter and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 24, 2023, with application number 202311587271.7 and application name “A Resonator, Filter and Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the technical field of electronic devices, and specifically to a resonator, a filter, and an electronic device. Background Art

[0003] With the development of wireless communication technology, filters are increasingly used. For example, in radio frequency systems, filters are used to filter out signals of unwanted frequencies.

[0004] The mainstream solution currently used in filters is the metal coaxial cavity solution. When the signal enters the filter from the input end, an electromagnetic field is excited inside the filter. Multiple metal coaxial resonators inside the filter resonate at a specific frequency. Energy is coupled between the resonators through a coupling window, allowing only signals near the resonant frequency of the resonator to pass through, while signals at other frequencies cannot pass through, thereby achieving a filtering effect.

[0005] However, with the update and upgrade of the RF system, the number of resonators required has also increased, resulting in a larger arrangement area of ​​the resonator cavity of the filter. The demand for miniaturization has also made the layout increasingly restricted, and may even exceed the limited area.

[0006] Summary of the Invention

[0007] The present invention provides a resonator for improving the space utilization of a resonant cavity, reducing the number of resonators required, and facilitating the arrangement of a filter cavity. The present invention also provides a corresponding filter and electronic device.

[0008] According to a first aspect of the present application, a resonator is provided, which includes a metal cavity, a dielectric body and a metal step embedded in the metal cavity, the dielectric body including a dielectric through-hole extending vertically therethrough, and the metal step including a step through-hole extending vertically therethrough, wherein the bottom surface of the dielectric body includes a first region and a second region, the first region being in contact with the top surface of the metal step, the second region being a region where the step through-hole is projected onto the bottom surface of the dielectric body, the second region being connected at both ends, the first region being covered with a first metal layer, the second region being covered with a second metal layer, the second metal layer including a first non-metallic region; the surface of the dielectric body includes a third region, the third region being a region of the surface of the dielectric body excluding the first and second regions, the third region being covered with a third metal layer, the third metal layer including the second non-metallic region; the surface of the dielectric through-hole includes a fourth region and a fifth region, the fourth region being connected to the second region, the fifth region being a region of the surface of the dielectric through-hole excluding the fourth region, the fourth region being covered with the second metal layer, and the fifth region being covered with the fourth metal layer.

[0009] The metal cavity in the present application can be understood as a metal shell, which forms a hollow cavity inside the metal cavity. The dielectric body and the metal step are both located inside the metal cavity, that is, in the hollow cavity.

[0010] The metal step in the present application is located at the bottom of the metal cavity. The metal step includes a step through-hole that runs through the top and bottom, and the step through-hole runs through a first distance from the bottom of the metal cavity. The step through-hole makes the metal shell of the metal cavity incompletely closed. The first distance is also the height of the metal step, and the specific value of the first distance can be determined according to actual needs. The dielectric body can be made of non-metallic materials such as ceramics. The dielectric body does not contact the metal cavity, but only contacts the metal step. The dielectric body includes a dielectric through-hole that runs through the top and bottom, and the dielectric through-hole is enclosed inside the step through-hole, that is, when viewed from the bottom of the step through-hole upwards, the complete dielectric through-hole can be seen.

[0011] In this application, the entire surface of the dielectric body and the surface of the dielectric through-hole are covered with a metal layer. The surface of the dielectric body is divided into a first region, a second region, and a third region, and the surface of the dielectric through-hole is divided into a fourth region and a fifth region. In this application, the first non-metallic region is an open road surface, and the second non-metallic region is a coupling window.

[0012] In the present application, there is an area on the bottom surface of the dielectric body that is in contact with the top surface of the metal step, indicating that the dielectric body is placed on the metal step. The dielectric body and the metal step may be fixedly connected or not fixedly connected.

[0013] In the present application, the entire surface of the dielectric body and the metal layer covering the surface of the dielectric through-hole divide the resonator into two parts, inner and outer. On the outside of the resonator, the metal cavity, metal steps and various metal layers together constitute a metal coaxial resonator. Inside the resonator, the dielectric body, dielectric through-holes, various metal layers and the first non-metallic area together constitute a dielectric transverse electromagnetic mode (TEM) resonator.

[0014] In the first aspect, the resonator includes a metal cavity and a dielectric body and a metal step built into the metal cavity. The dielectric body includes a dielectric through-hole extending upward and downward, and the metal step includes a step through-hole extending upward and downward. Each surface of the dielectric body is covered with a metal layer, and a non-metallic layer is provided in the metal layer at the bottom of the dielectric body as an open road surface. Another non-metallic layer is provided in the metal layer on the outer surface of the dielectric body as a coupling window, whereby the metal layer divides the resonator into two parts, an inner part and an outer part. On the outside, the metal cavity, the metal step, and the metal layer together form a metal coaxial resonator. On the inside, the dielectric body, the dielectric through-hole, the open road surface, and the metal layer together form a dielectric transverse electromagnetic mode resonator, achieving dual modes in one cavity. Energy transfer between the inner and outer resonators is achieved through the coupling window, doubling the spatial utilization of the resonant cavity, thereby reducing the required number of resonators and facilitating the cavity arrangement of the filter.

[0015] In a possible implementation manner of the first aspect, the first non-metallic region is located in at least one region at the bottom of the second region or the fourth region.

[0016] In this possible implementation, the number of open surfaces can be multiple, and it is only necessary to ensure that there is an open surface at the bottom of the dielectric TEM mode resonator, which improves the feasibility of the solution.

[0017] In a possible implementation of the first aspect, the dielectric body further includes a dielectric boss extending into the stepped through-hole, the dielectric through-hole penetrates the dielectric boss, and a side surface of the dielectric boss is covered with a second metal layer.

[0018] In this possible implementation, an additional medium boss may be provided in the medium body, thereby improving the feasibility of the solution.

[0019] In a possible implementation of the first aspect, the first non-metallic region is located in at least one of the bottom surface, side surface, bottom of the fourth region, or the sixth region of the dielectric boss, where the sixth region is the region of the second region excluding the bottom surface of the dielectric boss.

[0020] In this possible implementation, when the medium body further includes a medium boss, the number of positions where the open road surface can be arranged increases, thereby improving the feasibility of the solution.

[0021] In a possible implementation manner of the first aspect, the second non-metallic region is located in at least one region of a top surface, a side surface, or a bottom surface of the dielectric body.

[0022] In this possible implementation, there can be multiple coupling windows, which improves the feasibility of the solution.

[0023] In a possible implementation of the first aspect, the resonator further includes a dielectric sheet, the bottom surface of the dielectric sheet is covered with a fifth metal layer, the fifth metal layer is bonded to the third metal layer on the top surface of the dielectric body, and the dielectric through hole penetrates the dielectric sheet.

[0024] In this possible implementation, since the relative dielectric constant of the dielectric sheet is large (greater than the original air), the dielectric sheet can increase the capacitance between the resonant disk and the resonant cavity of the external metal coaxial resonator, thereby reducing the resonant frequency of the metal coaxial resonator, so that the resonant cavity of the metal coaxial resonator can be further reduced, realizing the miniaturization of the metal coaxial resonator, and thus realizing the overall miniaturization of the resonator.

[0025] In a possible implementation manner of the first aspect, the top surface of the dielectric sheet is covered with a sixth metal layer, and the sixth metal layer is in contact with the top surface of the metal cavity.

[0026] In this possible implementation, when the dielectric sheet contacts the top surface of the metal cavity, the sixth metal layer and the top surface of the metal cavity may be in contact by compression, which can further reduce process difficulty.

[0027] In a possible implementation manner of the first aspect, a distance between a top surface of the dielectric sheet and a top surface of the metal cavity is a first preset value, and the first preset value is greater than zero.

[0028] In this possible implementation, the top surface of the dielectric sheet may not be in contact with the top surface of the metal cavity, thereby improving the feasibility of the solution.

[0029] In a possible implementation of the first aspect, the bottom surface of the stepped through hole is closed, and the metal cavity further includes a first screw hole extending into the stepped through hole, and the first screw hole is located on the bottom surface of the stepped through hole.

[0030] In this possible implementation, the first screw hole can support the penetration of the first screw, thereby adjusting the resonant frequency of the dielectric TEM mode resonator.

[0031] In a possible implementation manner of the first aspect, the resonator further includes a first screw, the first screw cooperates with the first screw hole, and the first screw is used to move in the first screw hole.

[0032] In this possible implementation, the resonator is already provided with a first screw that matches the first screw hole, thereby reducing assembly errors that may occur in subsequent matching of the first screw.

[0033] In a possible implementation manner of the first aspect, the metal cavity further includes a second screw hole, and the second screw hole is located on the top surface of the metal cavity.

[0034] In this possible implementation, the second screw hole can support the penetration of the second screw, thereby adjusting the resonant frequency of the metal coaxial resonator.

[0035] In a possible implementation manner of the first aspect, the resonator further includes a second screw, the second screw cooperates with the second screw hole, and the second screw is used to move in the second screw hole.

[0036] In this possible implementation, the resonator is already provided with a second screw that matches the second screw hole, thereby reducing assembly errors that may occur when subsequently matching the second screw.

[0037] In a possible implementation manner of the first aspect, the second screw hole extends into the medium through hole.

[0038] In this possible implementation, the length of the second screw hole is increased, which also increases the tuning range for adjusting the resonant frequency of the metal coaxial resonator.

[0039] In a possible implementation of the first aspect, the cross-section of the dielectric body is a polygon, or the sides of the cross-section of the dielectric body are curves.

[0040] In this possible implementation, the medium body includes at least a top surface, a bottom surface, and a side surface, and its specific shape can be cylindrical, regular prism, irregular prism, trapezoidal prism, etc., which improves the feasibility of the solution.

[0041] According to a second aspect of the present application, a resonator is provided, which includes a metal cavity, a dielectric body and a metal step embedded in the metal cavity, the metal step including a step through-hole extending upward and downward, wherein the bottom surface of the dielectric body includes a first region and a second region, the first region is in contact with the top surface of the metal step, the second region is the region where the step through-hole is projected onto the bottom surface of the dielectric body, the first region is covered with a first metal layer, and the second region is covered with a second metal layer; the surface of the dielectric body includes a third region, which is the region of the surface of the dielectric body other than the first region and the second region, the third region is covered with a third metal layer, and the third metal layer includes a second non-metallic region.

[0042] In this second aspect, the metal layer covering the entire surface of the dielectric body divides the resonator into two parts, the inner and outer parts. On the outside of the resonator, the metal cavity, metal steps, and various metal layers together form a metal coaxial resonator. Inside the resonator, the dielectric body and various metal layers together form a dielectric waveguide resonator. This achieves dual-mode in one cavity, and the second non-metallic region acts as a coupling window to couple the metal coaxial resonator and the dielectric waveguide resonator, achieving energy transfer between the inner and outer resonators, doubling the efficiency of the resonator, which is equivalent to doubling the spatial utilization of the resonant cavity, thereby reducing the number of resonators required and facilitating the arrangement of the filter cavity.

[0043] In a possible implementation of the second aspect, the dielectric body includes a dielectric top hole and / or a dielectric bottom hole; the dielectric top hole is located at the top of the dielectric body, and the bottom surface of the dielectric top hole is closed; the dielectric bottom hole is located at the bottom surface of the dielectric body, and the top surface of the dielectric bottom hole is closed; the surfaces of the dielectric top hole and the dielectric bottom hole are covered with a fourth metal layer.

[0044] In this possible implementation, the dielectric body may be provided with only a dielectric top hole, a dielectric bottom hole, or both dielectric top and dielectric bottom holes. Both the dielectric top and dielectric bottom holes may reduce the resonant frequency of the dielectric waveguide resonator.

[0045] In a possible implementation manner of the second aspect, the dielectric body further includes a dielectric boss extending into the stepped through hole.

[0046] In a possible implementation manner of the second aspect, the second non-metallic region is located in at least one region of a top surface, a side surface, or a bottom surface of the dielectric body.

[0047] In a possible implementation of the second aspect, the resonator further includes a dielectric sheet, a bottom surface of the dielectric sheet is covered with a fifth metal layer, and the fifth metal layer is bonded to the third metal layer on the top surface of the dielectric body.

[0048] In a possible implementation manner of the second aspect, the top surface of the dielectric sheet is covered with a sixth metal layer, and the sixth metal layer is in contact with the top surface of the metal cavity.

[0049] In a possible implementation manner of the second aspect, a distance between a top surface of the dielectric sheet and a top surface of the metal cavity is a first preset value, and the first preset value is greater than zero.

[0050] In a possible implementation manner of the second aspect, the metal cavity further includes a second screw hole, and the second screw hole is located on the top surface of the metal cavity.

[0051] In a possible implementation manner of the second aspect, the resonator further includes a second screw, the second screw cooperates with the second screw hole, and the second screw is used to move in the second screw hole.

[0052] In a possible implementation manner of the second aspect, the bottom surface of the stepped through hole is closed.

[0053] In a possible implementation of the second aspect, the cross-section of the dielectric body is a polygon, or the sides of the cross-section of the dielectric body are curves.

[0054] A third aspect of the present application provides a filter, which includes at least one resonator as described in the first aspect or any possible implementation of the first aspect, and an input port and / or an output port.

[0055] A fourth aspect of the present application provides a filter, which includes at least one resonator as described in the second aspect or any possible implementation of the second aspect, and an input port and / or an output port.

[0056] A fifth aspect of the present application provides an electronic device, which includes at least one resonator as described in the first aspect or any possible implementation of the first aspect.

[0057] In a sixth aspect, the present application provides an electronic device comprising at least one resonator according to the second aspect or any possible implementation of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 is a schematic diagram of the transmitter architecture;

[0059] FIG2 is a schematic diagram of the filter architecture;

[0060] FIG3 is a schematic diagram of an embodiment of a resonator provided in an embodiment of the present application;

[0061] FIG4A is a schematic diagram of a first region in a resonator provided in an embodiment of the present application;

[0062] FIG4B is a schematic diagram of a second region in a resonator provided in an embodiment of the present application;

[0063] FIG4C is a schematic diagram of a third region in a resonator provided in an embodiment of the present application;

[0064] FIG4D is a schematic diagram of a fourth region in a resonator provided in an embodiment of the present application;

[0065] FIG4E is a schematic diagram of a fifth region in a resonator provided in an embodiment of the present application;

[0066] FIG5 is a schematic diagram of an embodiment of a resonator provided in an embodiment of the present application;

[0067] 6A-6E are schematic diagrams of embodiments of a first non-metallic region in a resonator provided in an embodiment of the present application;

[0068] 7A and 7B are schematic diagrams of embodiments of a second non-metallic region in a resonator provided in an embodiment of the present application;

[0069] 8 to 11 are schematic diagrams of embodiments of the resonator provided in the embodiments of the present application;

[0070] 12A-12F are three-dimensional schematic diagrams of an embodiment of a resonator provided in an embodiment of the present application;

[0071] FIG13 is a schematic diagram of another embodiment of a resonator provided in an embodiment of the present application;

[0072] FIG14A is a schematic diagram of a first region in another resonator provided in an embodiment of the present application;

[0073] FIG14B is a schematic diagram of a second region in another resonator provided in an embodiment of the present application;

[0074] FIG14C is a schematic diagram of a third region in another resonator provided in an embodiment of the present application;

[0075] 15 and 16 are schematic diagrams of another embodiment of a resonator provided in an embodiment of the present application;

[0076] 17A and 17B are schematic diagrams of an embodiment of a second non-metallic region in another resonator provided in an embodiment of the present application;

[0077] 18-20 are schematic diagrams of another embodiment of a resonator provided in an embodiment of the present application;

[0078] 21A-21H are three-dimensional schematic diagrams of another resonator embodiment provided in an embodiment of the present application;

[0079] FIG22 is a schematic diagram of a filter provided in an embodiment of the present application;

[0080] FIG23 is a schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0081] The following describes the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present application, rather than all the embodiments. Those skilled in the art will appreciate that with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0082] The terms "first," "second," and the like in the specification and claims of this application and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatus.

[0083] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0084] In addition, numerous specific details are provided in the detailed description below to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0085] The following examples illustrate the application scenarios involved in the embodiments of the present application.

[0086] With the development of wireless communication technology, filters are increasingly used. For example, in radio frequency systems, filters are used to filter out signals of unwanted frequencies.

[0087] In a base station system, the RF system generally consists of a transmitter and a receiver. Taking the transmitter as an example, as shown in Figure 1, the transmitter includes a modulator, an upconverter, a power amplifier module, a filter, and an antenna. Oscillator 1 is coupled to the modulator, and oscillator 2 is coupled to the upconverter. The baseband signal is modulated and upconverted to an RF signal. After amplification by the power amplifier module and filtering by the filter, it is transmitted to the antenna and radiated into free space.

[0088] The mainstream resonator solution currently used in filters is the metal coaxial cavity solution. When the signal enters the filter from the input end, an electromagnetic field is excited inside the filter. Multiple metal coaxial resonators inside the filter resonate at a specific frequency. Energy is coupled between the resonators through a coupling window, allowing only signals near the resonant frequency of the resonator to pass through, while signals at other frequencies cannot pass through, thereby achieving a filtering effect.

[0089] However, as radio frequency systems are updated and upgraded, the number of resonators required also increases. As shown in Figure 2, this results in a larger arrangement area of ​​the resonator cavity of the filter. The demand for miniaturization also makes the layout increasingly restricted, and may even exceed the limited area. Based on this, an embodiment of the present application provides a resonator for improving the space utilization of the resonant cavity, reducing the required number of resonators, and facilitating the cavity arrangement of the filter. An embodiment of the present application also provides corresponding filters and electronic devices. Each of these is described in detail below.

[0090] The resonator provided in the embodiment of the present application is described below in conjunction with the above application scenarios.

[0091] As shown in FIG. 3 , an embodiment of the present application provides a resonator. An embodiment of the resonator includes a metal cavity 110 , and a dielectric body 120 and a metal step 130 built into the metal cavity 110 .

[0092] The metal cavity 110 can be understood as a metal shell, which forms a hollow cavity inside the metal cavity 110 . The dielectric body 120 and the metal step 130 are both located inside the metal cavity 110 , that is, in the hollow cavity.

[0093] A metal step 130 is located at the bottom of the metal cavity 110. This metal step 130 is also made of metal and includes a step through-hole 131 extending vertically therethrough. This step through-hole 131 extends a first distance from the bottom of the metal cavity 110, preventing the metal shell of the metal cavity 110 from being completely sealed. This first distance is also the height of the metal step 130, and the specific value of the first distance can be determined based on actual needs.

[0094] The dielectric body 120 can be made of a non-metallic material such as ceramic. It does not contact the metal cavity 110 but only contacts the metal step 130. The dielectric body 120 includes a dielectric through-hole 121 extending vertically therethrough. This dielectric through-hole 121 is enclosed within the stepped through-hole 131. That is, the entire dielectric through-hole 121 is visible when viewed from the bottom of the stepped through-hole 131.

[0095] Specifically, as shown in Figures 4A-4E (corresponding to the first to fifth regions), the entire surface of the dielectric body 120 and the surface of the dielectric through-hole 121 are covered with a metal layer. In this embodiment of the present application, the surface of the dielectric body 120 is divided into a first region, a second region, and a third region, and the surface of the dielectric through-hole 121 is divided into a fourth region and a fifth region. The surface of the dielectric body 120 can also be divided into a top surface, an outer side surface, and a bottom surface, and the surface of the dielectric through-hole 121 can also be understood as the inner side surface of the dielectric body 120.

[0096] It should be understood that Figures 4A-4E are cross-sectional views, and therefore the darkened lines in Figures 4A-4E indicate the corresponding surfaces as the first to fifth regions, respectively. It should be noted that Figure 4B represents the second region, where the first non-metallic region 140 is obscured by the second region, and that the second non-metallic region 150 in Figure 4C also belongs to the third region.

[0097] The bottom surface of the dielectric body 120 includes a first region and a second region. The first region aligns with the top surface of the metal step 130, meaning that a region on the bottom surface of the dielectric body 120 aligns with the top surface of the metal step 130. This indicates that the dielectric body 120 is placed on the metal step 130. The dielectric body 120 and the metal step 130 may or may not be fixedly connected. The second region is the area projected onto the bottom surface of the dielectric body 120 by the step through-hole 131. The second region is connected at both ends, forming a circular area. This also indicates that the dielectric through-hole 121 is enclosed within the step through-hole 131. Otherwise, the step through-hole 131 would not project a circular area on the bottom surface of the dielectric body 120. It should be noted that the first non-metallic region 140 is also a region connected at both ends, meaning that the first non-metallic region 140 also forms a circular area.

[0098] The surface of the dielectric body 120 includes a third region, which is the region of the surface of the dielectric body 120 excluding the first region and the second region. That is, the entire surface of the dielectric body 120 excluding the first region and the second region is the third region. The third region involves the entire top surface, the entire outer side surface, and a portion of the bottom surface of the dielectric body 120. The portion of the bottom surface is the bottom surface that is not associated with the metal step 130.

[0099] Furthermore, the first region is covered with a first metal layer, the second region is covered with a second metal layer, and the third region is covered with a third metal layer. The second metal layer includes a first non-metal region 140, and the third metal layer includes a second non-metal region 150. First non-metal region 140 is an open road surface, and second non-metal region 150 is a coupling window. The open road surface and coupling window will be described in detail later.

[0100] The surface of dielectric via 121 includes a fourth region and a fifth region. The fourth region is connected to the second region, indicating that the fourth region is located at the bottom of dielectric via 121. The fifth region is the surface of dielectric via 121 excluding the fourth region. The fourth region is covered with a second metal layer, that is, the second metal layer on the fourth region is coupled with the second metal layer on the second region. The first non-metallic region 140 can be located on the second region, and the first non-metallic region can also be located on the fourth region. The fifth region is covered with a fourth metal layer.

[0101] In the embodiment of the present application, the first metal layer, the second metal layer, the third metal layer and the fourth metal layer can be understood as the same metal layers coupled together, and their different names are only for distinguishing the different regions to which they belong.

[0102] It should be understood that the various regions covered by the metal layer in the embodiments of the present application specifically mean that the region completely covers the metal layer. For example, the second region covered by the second metal layer means that the entire second region is covered by the second metal layer. The non-metallic regions referred to in the embodiments of the present application can completely cover the metal layer or only exist in a portion of the metal layer. For example, the first non-metallic region 140 completely covers the second metal layer, and the second non-metallic region 150 is only located in a small portion of the third metal layer.

[0103] In the embodiment of the present application, the metal cavity 110 , the dielectric body 120 , the metal step 130 , the dielectric through hole 121 and the step through hole 131 are all cylindrical for illustration, but the embodiment of the present application does not limit the specific shapes of the above structures.

[0104] The metal layer covering the entire surface of the dielectric body 120 and the surface of the dielectric through-hole 121 divides the resonator into two parts, the inner and outer parts. On the outside of the resonator, the metal cavity 110, the metal step 130 and the various metal layers together constitute a metal coaxial resonator. Inside the resonator, the dielectric body 120, the dielectric through-hole 121, the various metal layers and the first non-metallic region 140 together constitute a dielectric transverse electromagnetic mode (TEM) resonator.

[0105] For the metal coaxial resonator formed outside the resonator, it is similar to the conventional metal coaxial resonator, and the embodiments of the present application will not be repeated here. For the dielectric TEM mode resonator formed inside the resonator, the dielectric through hole 121 can be regarded as a resonant rod, and the top area of ​​the resonant rod, that is, the fifth area, is covered with a fourth metal layer, and the third area located at the top of the dielectric body 120 is also covered with a third metal layer, and the contact of the two metal layers forms a short-circuit surface. The bottom area of ​​the resonant rod, that is, the second area or the fourth area, is covered with a second metal layer, and a first non-metallic area 140 is provided on the second metal layer, and the first non-metallic area 140 forms an open surface. The top of the resonant rod is a short-circuit surface (the strongest magnetic field), which is equivalent to L, and the bottom is an open surface (the strongest electric field), which is equivalent to C. Therefore, the resonant cavity composed of the resonant rod forms a dielectric TEM mode resonator of LC resonance. In this way, dual-mode is achieved in one cavity, and the metal coaxial resonator and the dielectric TEM mode resonator are coupled by using the second non-metallic area 150 as a coupling window, doubling the efficiency of the resonator, which is equivalent to doubling the spatial utilization of the resonant cavity, thereby reducing the required number of resonators and facilitating the cavity arrangement of the filter.

[0106] Optionally, the first non-metallic region 140 is located in at least one region at the bottom of the second region or the fourth region, that is, the number of the first non-metallic regions 140 can be multiple, as long as an open surface is ensured at the bottom of the dielectric TEM mode resonator.

[0107] Optionally, as shown in FIG5 , the dielectric body 120 further includes a dielectric boss 160 extending into the stepped through-hole 131. The dielectric through-hole 121 penetrates the dielectric boss 160, i.e., the dielectric through-hole 121 extends throughout the entire dielectric body 120. The side surfaces of the dielectric boss 160 are covered with a second metal layer, i.e., the first non-metallic region 140 may also be located on the side surfaces of the dielectric boss 160. In this case, the first non-metallic region 140 may be located on at least one of the bottom surface, side surfaces, bottom of the fourth region, or the sixth region of the dielectric boss 160. The sixth region (indicated by the darkened lines in FIG5 ) is the area of ​​the second region excluding the bottom surface of the dielectric boss 160.

[0108] As shown in Figures 6A to 6E, various possible locations of the first non-metallic region 140 are shown. As shown in Figure 6A, when the dielectric body 120 does not include the dielectric boss 160, the first non-metallic region 140 is located at the bottom of the fourth region. As shown in Figure 6B, when the dielectric body 120 includes the dielectric boss 160, the first non-metallic region 140 is located at the bottom of the fourth region. As shown in Figure 6C, the first non-metallic region 140 is located on the bottom surface of the dielectric boss 160. As shown in Figure 6D, the first non-metallic region 140 is located on the side of the dielectric boss 160. As shown in Figure 6E, the first non-metallic region 140 is located in the sixth region.

[0109] It should be understood that the possible locations of the first non-metallic region 140 can be combined with each other, that is, there are multiple first non-metallic regions 140, and the embodiment of the present application is not limited to this.

[0110] Optionally, the second non-metallic region 150 is located on at least one of the top, side, or bottom surfaces of the dielectric body 120. Specifically, the coupling window is located on the top, side, or bottom surface of the dielectric body 120, or on two or more of these surfaces simultaneously. Specifically, at least one second non-metallic region 150 is provided on at least one of the top, side, or bottom surfaces of the dielectric body 120 to achieve energy coupling between the inner and outer resonant modes. The coupling window can be square, circular, annular, or other irregular shapes, as long as it forms a closed area and is non-metallized.

[0111] 7A , the second non-metallic region 150 is located on the top surface of the dielectric body 120 . As shown in FIG7B , the second non-metallic region 150 is located on the bottom surface of the dielectric body 120 .

[0112] Optionally, as shown in FIG8 , the resonator further includes a dielectric sheet 170. The bottom surface of the dielectric sheet 170 is covered with a fifth metal layer. The fifth metal layer is bonded to the third metal layer on the top surface of the dielectric body 120. The bonding method may be welding or co-firing, etc., as long as effective contact between the third metal layer and the fifth metal layer is maintained. The dielectric through hole 121 penetrates the dielectric sheet 170, that is, the dielectric through hole 121 not only penetrates the entire dielectric body 120, but also penetrates the dielectric sheet 170.

[0113] Since the relative dielectric constant of the dielectric sheet 170 is large (greater than the original air), the dielectric sheet 170 can increase the capacitance between the resonant disk and the resonant cavity of the external metal coaxial resonator, thereby reducing the resonant frequency of the metal coaxial resonator, so that the resonant cavity of the metal coaxial resonator can be further reduced, thereby achieving miniaturization of the metal coaxial resonator and thus achieving overall miniaturization of the resonator.

[0114] Optionally, when the dielectric sheet 170 is present, the dielectric sheet 170 may or may not be in contact with the top surface of the metal cavity 110 .

[0115] As shown in Figure 9, when the dielectric sheet 170 is in contact with the top surface of the metal cavity 110, the top surface of the dielectric sheet 170 is covered with a sixth metal layer, and the sixth metal layer is in contact with the top surface of the metal cavity 110. The contact method can be welding or crimping. The embodiment of the present application does not limit the contact method between the sixth metal layer and the top surface of the metal cavity 110, and it is only necessary to ensure effective contact between the two.

[0116] It should be understood that, when the dielectric sheet 170 contacts the top surface of the metal cavity 110 , using a press-fitting method can further reduce the difficulty of the process.

[0117] 8 , when the dielectric sheet 170 is not in contact with the top surface of the metal cavity 110 , the distance between the top surface of the dielectric sheet 170 and the top surface of the metal cavity 110 is a first preset value, which is greater than zero. The specific value of the first preset value can be determined according to actual needs, and the embodiment of the present application does not impose any restrictions on this.

[0118] Optionally, as shown in FIG10 , the bottom surface of the step through hole 131 of the metal step 130 is closed, that is, the entire metal cavity 110 is closed. In this case, the metal cavity 110 may further include a first screw hole 180 extending into the step through hole 131, and the first screw hole 180 is located on the bottom surface of the step through hole 131. The resonator may further include a first screw (not shown in the figure), which cooperates with the first screw hole 180 and is used to move within the first screw hole 180. In this case, the first screw can serve as a tuning screw, which moves within the first screw hole 180 and penetrates into the step through hole 131. By changing the penetration depth of the first screw, the electric field distribution near the open surface of the dielectric TEM mode resonator can be changed, thereby changing the equivalent capacitance to adjust the resonant frequency of the dielectric TEM mode resonator.

[0119] In addition, a grinding rod or a grinding head can be used to penetrate from the stepped through hole 131 into the dielectric through hole 121 to grind the bottom or surface of the dielectric through hole 121 to adjust the resonant frequency of the dielectric TEM mode resonator. In this case, the metal cavity 110 can also be provided with the first screw hole 180.

[0120] Optionally, as shown in FIG11 , the metal cavity 110 further includes a second screw hole 190, which is located on the top surface of the metal cavity 110. In this case, the resonator may further include a second screw (not shown in the figure), which cooperates with the second screw hole 190, and is used to move within the second screw hole 190. In this case, the second screw can be used as a tuning screw, which moves within the second screw hole 190 and penetrates into the metal cavity 110 or the dielectric through-hole 121. By changing the penetration depth of the second screw, the electric field distribution near the open surface of the metal coaxial resonator can be changed, thereby changing the equivalent capacitance to adjust the resonant frequency of the metal coaxial resonator.

[0121] It should be noted that the second screw hole 190 may extend into the medium through hole 121 or may not extend into the medium through hole 121. The length of the second screw hole 190 is related to the tuning range. The longer the length, the larger the tuning range. The length of the second screw hole 190 can be determined based on actual needs, and the embodiments of the present application do not limit this.

[0122] Optionally, the cross-sectional shape of the dielectric body 120 is polygonal. For example, when the cross-sectional shape of the dielectric body 120 is square, the dielectric body 120 is a regular quadrangular prism. Optionally, the sides of the cross-sectional shape of the dielectric body 120 are curved. For example, when the cross-sectional shape of the dielectric body 120 is circular, the dielectric body 120 is a cylinder. Specifically, the dielectric body 120 may be cylindrical, regular prism, irregular prism, trapezoidal prism, etc. The dielectric body 120 only needs to include a top surface, a bottom surface, and side surfaces. The specific shape of the dielectric body 120 is not limited in this embodiment of the present application.

[0123] It should be understood that the above-mentioned Figures 3 to 11 are all cross-sectional views of the resonator provided in the embodiments of the present application, and are described below with reference to several three-dimensional views of the resonator for illustration.

[0124] As shown in FIG12A , the resonator may correspond to the resonator shown in FIG3 , as shown in FIG12B , the resonator may correspond to the resonator shown in FIG7A , as shown in FIG12C , the resonator may correspond to the resonator shown in FIG7B , as shown in FIG12D , the resonator may correspond to the resonator shown in FIG5 , as shown in FIG12E , the resonator may correspond to the resonator shown in FIG8 , and as shown in FIG12F , the resonator is a regular quadrangular prism, and the cross-sectional shape of its dielectric body 120 is a square. It should be understood that the resonators of FIG12A-FIG12F all include a first screw hole 180 and a second screw hole 190.

[0125] As shown in FIG. 13 , another embodiment of the resonator provided in an embodiment of the present application includes a metal cavity 210 , and a dielectric body 220 and a metal step 230 built into the metal cavity 210 .

[0126] The metal cavity 210 can be understood as a metal shell, which forms a hollow cavity inside the metal cavity 210 . The dielectric body 220 and the metal step 230 are both located inside the metal cavity 210 , that is, in the hollow cavity.

[0127] A metal step 230 is located at the bottom of the metal cavity 210. The metal step 230 includes a step through-hole 231 extending vertically therethrough. The step through-hole 231 extends a first distance from the bottom of the metal cavity 210, preventing the metal shell of the metal cavity 210 from being completely sealed. The first distance, also known as the height of the metal step 230, can be determined based on actual needs.

[0128] The dielectric body 220 can be made of a non-metallic material such as ceramic. The dielectric body 220 does not contact the metal cavity 210, but only contacts the metal step 230. The entire surface of the dielectric body 220 is covered with a metal layer. In this embodiment of the present application, the surface of the dielectric body 220 is divided into a first region, a second region, and a third region. The surface of the dielectric body 220 can also be divided into a top surface, an outer side surface, and a bottom surface.

[0129] As shown in Figures 14A-14C (corresponding to the first to third regions), the bottom surface of the dielectric body 220 includes a first region and a second region. The first region aligns with the top surface of the metal step 230. Specifically, a region on the bottom surface of the dielectric body 220 aligns with the top surface of the metal step 230, indicating that the dielectric body 220 is placed on the metal step 230. The dielectric body 220 and the metal step 230 may or may not be fixedly connected. The second region is the projection of the step through-hole 231 onto the bottom surface of the dielectric body 220.

[0130] The surface of the dielectric body 220 includes a third region, which is the region of the surface of the dielectric body 220 excluding the first region and the second region. That is, the entire surface of the dielectric body 220 excluding the first region and the second region is the third region. The third region involves the entire top surface, the entire outer side surface, and a portion of the bottom surface of the dielectric body 220. The portion of the bottom surface is the bottom surface that is not associated with the metal step 230.

[0131] It should be understood that Figures 14A-14C are cross-sectional views, and therefore the darkened lines in Figures 14A-14C indicate that the corresponding surfaces are the first to third regions, respectively. It should be noted that the second non-metallic region 240 in Figure 14C also belongs to the third region.

[0132] Furthermore, the first region is covered with a first metal layer, the second region is covered with a second metal layer, and the third region is covered with a third metal layer. The third metal layer includes a second non-metal region 240. The second non-metal region 240 is a coupling window, which will be described in detail later.

[0133] In the embodiment of the present application, the first metal layer, the second metal layer and the third metal layer can be understood as the same metal layers coupled together, and their different names are only for distinguishing the different regions to which they belong.

[0134] It should be understood that the various areas referred to in the embodiments of the present application as being covered by a metal layer specifically mean that the area is completely covered by the metal layer. For example, the second area being covered by the second metal layer means that the entire second area is covered by the second metal layer.

[0135] In the embodiment of the present application, the metal cavity 210 , the dielectric body 220 , the metal step 230 and the step through hole 231 are all cylindrical for illustration, but the embodiment of the present application does not limit the specific shapes of the above structures.

[0136] The metal layer covering the entire surface of dielectric body 220 divides the resonator into two parts, inner and outer. On the outside of the resonator, the metal cavity 210, metal step 230, and various metal layers together form a metal coaxial resonator. Inside the resonator, dielectric body 220 and various metal layers together form a dielectric waveguide resonator. Both ends of the waveguide transmission direction are closed by the metal layer, and the closed cavity is filled with dielectric body 220. Due to the high relative dielectric constant of dielectric body 220, the resonant frequency can be reduced. After the electromagnetic field of a specific frequency is incident on the closed cavity, it is reflected by the various metal layers and forms a standing wave distribution, forming a dielectric waveguide resonator. This achieves dual-mode in one cavity. The second non-metallic region 240 acts as a coupling window to couple the metal coaxial resonator and the dielectric waveguide resonator, doubling the efficiency of the resonator, which is equivalent to doubling the spatial utilization of the resonant cavity. This reduces the number of resonators required and facilitates the arrangement of the filter cavity.

[0137] Optionally, as shown in FIG15 , dielectric body 220 includes dielectric top hole 250 and / or dielectric bottom hole 260. Dielectric top hole 250 is located at the top of dielectric body 220, with its bottom surface sealed. Dielectric bottom hole 260 is located at the bottom of dielectric body 220, with its top surface sealed. The surfaces of dielectric top hole 250 and dielectric bottom hole 260 are covered with a fourth metal layer.

[0138] The dielectric body 220 may be provided with only the dielectric top hole 250, only the dielectric bottom hole 260, or both the dielectric top hole 250 and the dielectric bottom hole 260. Both the dielectric top hole 250 and the dielectric bottom hole 260 can reduce the resonant frequency of the dielectric waveguide resonator. The surfaces of the dielectric top hole 250 and the dielectric bottom hole 260 can also be understood as the inner side surface of the dielectric body 220.

[0139] Optionally, as shown in FIG. 16 , the dielectric body 220 further includes a dielectric boss 270 extending into the stepped through hole 231 .

[0140] Optionally, the second non-metallic region 240 is located on at least one of the top, side, or bottom surfaces of the dielectric body 220. Specifically, the coupling window is located on the top, side, or bottom surface of the dielectric body 220, or on two or more of these surfaces simultaneously. Specifically, at least one second non-metallic region 240 is provided on at least one of the top, side, or bottom surfaces of the dielectric body 220 to achieve energy coupling between the inner and outer resonant modes. The coupling window can be square, circular, annular, or other irregular shapes, as long as it forms a closed area and is non-metallized.

[0141] 17A , the second non-metallic region 240 is located on the top surface of the dielectric body 220 . As shown in FIG17B , the second non-metallic region 240 is located on the bottom surface of the dielectric body 220 .

[0142] Optionally, as shown in FIG18 , the resonator further includes a dielectric sheet 280. The bottom surface of the dielectric sheet 280 is covered with a fifth metal layer. The fifth metal layer is coupled to the third metal layer on the top surface of the dielectric body 220. The coupling method may be welding or co-firing, as long as effective contact between the third and fifth metal layers is maintained. The dielectric vias penetrate the dielectric sheet 280, that is, the dielectric vias penetrate not only the entire dielectric body 220 but also the dielectric sheet 280.

[0143] Since the relative dielectric constant of the dielectric sheet 280 is large (greater than the original air), the dielectric sheet 280 can increase the capacitance between the resonant disk and the resonant cavity of the external metal coaxial resonator, thereby reducing the resonant frequency of the metal coaxial resonator, so that the resonant cavity of the metal coaxial resonator can be further reduced, thereby achieving miniaturization of the metal coaxial resonator and thus achieving overall miniaturization of the resonator.

[0144] Optionally, when the dielectric sheet 280 is present, the dielectric sheet 280 may or may not be in contact with the top surface of the metal cavity 210 .

[0145] As shown in Figure 19, when the dielectric sheet 280 is in contact with the top surface of the metal cavity 210, the top surface of the dielectric sheet 280 is covered with a sixth metal layer, and the sixth metal layer is in contact with the top surface of the metal cavity 210. The contact method can be welding or crimping. The embodiment of the present application does not limit the contact method between the sixth metal layer and the top surface of the metal cavity 210, and it is only necessary to ensure effective contact between the two.

[0146] It should be understood that, when the dielectric sheet 280 contacts the top surface of the metal cavity 210 , using a press-fitting method can further reduce the difficulty of the process.

[0147] 18 , when the dielectric sheet 280 is not in contact with the top surface of the metal cavity 210 , the distance between the top surface of the dielectric sheet 280 and the top surface of the metal cavity 210 is a first preset value, which is greater than zero. The specific value of the first preset value can be determined according to actual needs, and the embodiment of the present application does not impose any restrictions on this.

[0148] Optionally, as shown in FIG20 , the metal cavity 210 further includes a second screw hole 290, which is located on the top surface of the metal cavity 210. In this case, the resonator may further include a second screw (not shown in the figure), which cooperates with the second screw hole 290 and is used to move within the second screw hole 290. In this case, the second screw can serve as a tuning screw, which moves within the second screw hole 290 and penetrates into the metal cavity 210 or the dielectric through-hole to adjust the resonant frequency of the metal coaxial resonator.

[0149] When dielectric body 220 includes dielectric top hole 250 and dielectric bottom hole 260, the second screw can penetrate into the resonator, i.e., into dielectric top hole 250, through second screw hole 290. This increases the adjustment range of the resonant frequency of the metal coaxial resonator. Specifically, the surface (sidewall) of dielectric top hole 250 is a short-circuited surface, while the top is an open surface. By adjusting the penetration depth of the second screw, capacitance C can be reduced, thereby increasing the resonant frequency. Alternatively, the current path can be improved, thereby increasing inductance L and reducing the resonant frequency.

[0150] In addition, a grinding rod or a grinding head may be used to penetrate from the step through hole 231 to the dielectric bottom hole 260 to grind the bottom or surface of the dielectric bottom hole 260 to adjust the resonant frequency of the dielectric waveguide resonator.

[0151] It should be understood that the dielectric body 220 can be provided with only a step top hole, or only a step bottom hole, or both a step top hole and a step bottom hole, or neither of them can be provided. In either case, the resonant cavity can generate a dielectric waveguide resonant mode inside the dielectric, and whether or not a step top hole or a step bottom hole is provided only affects the adjustment range of the resonator's resonant frequency.

[0152] Optionally, when the resonant frequency of the resonator does not need to be adjusted, the bottom surface of the stepped through hole 231 is closed.

[0153] It should be noted that the second screw hole 290 may extend into the medium through hole or may not extend into the medium through hole. The length of the second screw hole 290 is related to the tuning range. The longer the length, the larger the tuning range. The length of the second screw hole 290 can be determined based on actual needs, and the embodiment of the present application does not limit this.

[0154] Optionally, the cross-sectional shape of the dielectric body 220 is polygonal. For example, when the cross-sectional shape of the dielectric body 220 is square, the dielectric body 220 is a regular quadrangular prism. Optionally, the sides of the cross-sectional shape of the dielectric body 220 are curved. For example, when the cross-sectional shape of the dielectric body 220 is circular, the dielectric body 220 is a cylinder. Specifically, the dielectric body 220 can be cylindrical, regular prism, irregular prism, trapezoidal prism, etc. The dielectric body 220 only needs to include a top surface, a bottom surface, and side surfaces. The specific shape of the dielectric body 220 is not limited in this embodiment of the present application.

[0155] It should be understood that the above Figures 13 to 20 are all cross-sectional views of the resonator provided in the embodiments of the present application, and are described below with reference to several three-dimensional views of the resonator for illustration.

[0156] As shown in Figures 21A and 21B, the resonator may correspond to the resonant cavity shown in Figure 15. As shown in Figure 21C, the resonator may also correspond to the resonator shown in Figure 15, but the resonator does not have dielectric bottom hole 260. As shown in Figure 21D, the resonant cavity may correspond to Figure 17A. As shown in Figure 21E, the resonator may correspond to Figure 17B. As shown in Figure 21F, the resonator may correspond to Figure 16. As shown in Figure 21G, the resonator may correspond to Figure 18. As shown in Figure 21H, the resonator is a regular quadrangular prism with a square cross-sectional shape of its dielectric body 220. It should be understood that the resonators of Figures 21A-21H all include second screw holes 290.

[0157] Summarizing the above two embodiments, it can be seen that compared with the existing metal coaxial resonator, the resonator provided in the embodiment of the present application realizes a dielectric TEM mode resonator or a dielectric waveguide resonator inside the metal coaxial resonator without increasing the size, thereby realizing a dual-mode cavity, doubling the efficiency of the resonator, which is equivalent to doubling the space utilization of the resonant cavity, thereby reducing the required number of resonators and facilitating the cavity arrangement of the filter.

[0158] It should be understood that there are multiple possible implementations of the resonator provided in the embodiments of the present application, and the above-mentioned multiple possible implementations can be combined with each other, which is not limited by the embodiments of the present application.

[0159] The resonator provided in the embodiments of the present application is introduced above. The filter and electronic device provided in the embodiments of the present application are introduced below with reference to the accompanying drawings.

[0160] The filter shown in Figure 22 uses the resonator provided in the embodiment of the present application, that is, the three resonators shown in Figure 22 are the resonators provided in the embodiment of the present application. The filter can produce the same effect as the filter shown in Figure 2, but the filter shown in Figure 22 can realize a linear cavity arrangement, which reduces the difficulty of the cavity arrangement design of the filter and facilitates the design and manufacture of the filter. When the number of resonators required for the same filter remains unchanged, the cavity arrangement area of ​​the resonator is greatly saved, thereby realizing the miniaturization of the filter.

[0161] As shown in FIG23 , an embodiment of the present application provides an electronic device, which includes a filter. The filter includes at least one resonator, and an input port and / or an output port.

[0162] The electronic device is any device that requires a filter, such as a transmitter or receiver in a communication device, or an electronic device such as a sensor, an audio and video processor, etc.

[0163] The filter includes at least one resonator. Exemplarily, the filter includes resonators 1, 2, and 3. After an input signal enters resonator 1 from an input port, it is output from an output port of resonator 3.

[0164] Optionally, resonators 1 to 3 are all the resonators described in FIG. 3 to FIG. 12F in the above embodiments.

[0165] Optionally, resonators 1 to 3 are all the resonators described in FIG. 13 to FIG. 21H in the above embodiments.

[0166] Optionally, resonator 1 is the resonator described in Figures 3-12F of the above embodiment, and resonant cavity 2 and resonator 3 are the resonators described in Figures 13-21H of the above embodiment. Alternatively, resonator 1 and resonant cavity 2 are the resonators described in Figures 3-12F of the above embodiment, and resonator 3 is the resonator described in Figures 13-21H of the above embodiment. It should be understood that the embodiments of the present application do not limit the type and number of resonators provided in the filter.

[0167] Optionally, the input port and / or output port can be coupled to the resonator provided in the embodiment of the present application, or can be coupled to other types of resonators, and the other types of resonators can be coupled to the resonator provided in the embodiment of the present application. For example, resonator 1 and resonator 3 are the metal coaxial resonators shown in Figure 2, and resonator 2 is the resonator described in Figures 3 to 12F in the above embodiments or the resonator described in Figures 13 to 21H in the above embodiments.

[0168] Those skilled in the art will appreciate that the structural units of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of this application.

[0169] In the several embodiments provided in this application, it should be understood that the disclosed structure can be implemented in other ways. For example, the embodiments described above are merely schematic. For example, the division of the structure can be divided in other ways in actual implementation, such as multiple units or components can be combined or integrated into another structure, or some features can be ignored. Some or all of the structures can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, structures or units, which can be electrical, mechanical or other forms.

[0170] In addition, the various structures in the embodiments of the present application may be integrated into one structure, or each structure may exist physically separately, or two or more structures may be integrated into one structure.

[0171] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A resonator, characterized in that: It includes a metal cavity, and a dielectric body and a metal step built into the metal cavity, wherein the dielectric body includes a dielectric through hole penetrating up and down, and the metal step includes a step through hole penetrating up and down, wherein: The bottom surface of the dielectric body includes a first area and a second area, the first area is in contact with the top surface of the metal step, the second area is an area where the step through hole is projected onto the bottom surface of the dielectric body, the second area is connected at both ends, the first area is covered with a first metal layer, the second area is covered with a second metal layer, and the second metal layer includes a first non-metal area; The surface of the dielectric body includes a third region, the third region is a region of the surface of the dielectric body except the first region and the second region, the third region is covered with a third metal layer, and the third metal layer includes a second non-metal region; The surface of the dielectric through hole includes a fourth area and a fifth area, the fourth area is connected to the second area, the fifth area is the area of ​​the surface of the dielectric through hole except the fourth area, the fourth area is covered with the second metal layer, and the fifth area is covered with a fourth metal layer.

2. The resonator according to claim 1, characterized in that The first non-metallic region is located at at least one of a bottom of the second region or the fourth region.

3. The resonator according to claim 1 or 2, characterized in that The dielectric body further includes a dielectric boss extending into the stepped through hole, the dielectric through hole penetrates the dielectric boss, and a side surface of the dielectric boss is covered with the second metal layer.

4. The resonator according to claim 3, characterized in that The first non-metallic region is located at least one of the bottom surface, the side surface, the bottom of the fourth region or the sixth region of the dielectric boss, and the sixth region is the region of the second region excluding the bottom surface of the dielectric boss.

5. The resonator according to any one of claims 1 to 4, characterized in that: The second non-metallic region is located at least one of the top surface, the side surface or the bottom surface of the dielectric body.

6. The resonator according to any one of claims 1 to 5, characterized in that: The resonator further comprises a dielectric sheet, the bottom surface of the dielectric sheet is covered with a fifth metal layer, the fifth metal layer is bonded to the third metal layer on the top surface of the dielectric body, and the dielectric through hole penetrates the dielectric sheet.

7. The resonator according to claim 6, characterized in that The top surface of the dielectric sheet is covered with a sixth metal layer, and the sixth metal layer is in contact with the top surface of the metal cavity.

8. The resonator according to claim 6, characterized in that The distance between the top surface of the dielectric sheet and the top surface of the metal cavity is a first preset value, and the first preset value is greater than zero.

9. The resonator according to any one of claims 1 to 8, characterized in that: The bottom surface of the stepped through hole is closed, and the metal cavity further includes a first screw hole extending into the stepped through hole, and the first screw hole is located on the bottom surface of the stepped through hole.

10. The resonator according to claim 9, characterized in that The resonator further includes a first screw, the first screw cooperates with the first screw hole, and the first screw is used to move in the first screw hole.

11. The resonator according to any one of claims 1 to 10, characterized in that The metal cavity further includes a second screw hole, and the second screw hole is located on the top surface of the metal cavity.

12. The resonator according to claim 11, characterized in that The resonator further includes a second screw, the second screw cooperates with the second screw hole, and the second screw is used to move in the second screw hole.

13. The resonator according to claim 11 or 12, characterized in that The second screw hole extends into the medium through hole.

14. The resonator according to any one of claims 1 to 13, characterized in that The cross-sectional shape of the medium body is a polygon, or the side of the cross-sectional shape of the medium body is a curve.

15. A resonator, characterized in that: It includes a metal cavity, a dielectric body and a metal step built into the metal cavity, wherein the metal step includes a step through hole penetrating up and down, wherein: The bottom surface of the dielectric body includes a first area and a second area, the first area is in contact with the top surface of the metal step, the second area is the area where the step through hole is projected onto the bottom surface of the dielectric body, the first area is covered with a first metal layer, and the second area is covered with a second metal layer; The surface of the dielectric body includes a third region, which is a region of the surface of the dielectric body excluding the first region and the second region. The third region is covered with a third metal layer, and the third metal layer includes a second non-metal region.

16. The resonator according to claim 15, characterized in that The medium body comprises a medium top hole and / or a medium bottom hole; The medium top hole is located at the top of the medium body, and the bottom surface of the medium top hole is closed; the medium bottom hole is located at the bottom surface of the medium body, and the top surface of the medium bottom hole is closed; The surfaces of the dielectric top hole and the dielectric bottom hole are covered with a fourth metal layer.

17. The resonator according to claim 15 or 16, characterized in that The medium body further includes a medium boss extending into the stepped through hole.

18. The resonator according to any one of claims 15 to 17, characterized in that The second non-metallic region is located at least one of the top surface, the side surface or the bottom surface of the dielectric body.

19. The resonator according to any one of claims 15 to 18, characterized in that The resonator further comprises a dielectric sheet, the bottom surface of which is covered with a fifth metal layer, and the fifth metal layer is bonded to the third metal layer on the top surface of the dielectric body.

20. The resonator according to claim 19, characterized in that The top surface of the dielectric sheet is covered with a sixth metal layer, and the sixth metal layer is in contact with the top surface of the metal cavity.

21. The resonator according to claim 19, characterized in that The distance between the top surface of the dielectric sheet and the top surface of the metal cavity is a first preset value, and the first preset value is greater than zero.

22. The resonator according to any one of claims 15 to 21, characterized in that The metal cavity further includes a second screw hole, and the second screw hole is located on the top surface of the metal cavity.

23. The resonator according to claim 22, characterized in that The resonator further includes a second screw, the second screw cooperates with the second screw hole, and the second screw is used to move in the second screw hole.

24. The resonator according to any one of claims 15 to 23, characterized in that The bottom surface of the step through hole is closed.

25. The resonator according to any one of claims 15 to 24, characterized in that The cross-sectional shape of the medium body is a polygon, or the side of the cross-sectional shape of the medium body is a curve.

26. A filter, characterized in that: The filter comprises at least one resonator according to any one of claims 1 to 25, and an input port and / or an output port.

27. An electronic device, characterized in that: The electronic device comprises the resonator according to any one of claims 1-25.

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