Resonator, filter and electronic equipment

Abstract

The invention discloses a resonator, a filter and electronic equipment, the resonator comprises a metal cavity, and a dielectric body and a metal step which are arranged in the metal cavity, the dielectric body comprises a dielectric through hole which is through up and down, the metal step comprises a step through hole which is through up and down, each surface of the dielectric body is covered with a metal layer, and the metal layer is arranged on the metal cavity. A non-metal layer is arranged in the metal layer at the bottom of the dielectric body to serve as an open-circuit surface, and another non-metal layer is arranged on the metal layer on the outer surface of the dielectric body to serve as a coupling window, so that the resonator is divided into an inner part and an outer part by the metal layers. The metal cavity, the metal step and the metal layer jointly form a metal coaxial resonator outside, the dielectric body, the dielectric through hole, the open-circuit surface and the metal layer jointly form a dielectric transverse electromagnetic mode resonator inside, one-cavity dual-mode is achieved, the space utilization rate of the resonant cavity is doubled through coupling of the coupling window, and therefore the number of needed resonators is reduced, and the cost is reduced. And the cavity arrangement of the filter is facilitated.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic devices, and in particular, to a resonator, a filter, and an electronic device. Background Art

[0002] With the development of wireless communication technology, the application of filters has become more and more extensive. For example, in a radio frequency system, a filter is used to filter signals of useless frequencies.

[0003] The current mainstream solution adopted by filters is the metal coaxial cavity solution. When a 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 coupling is carried out between the resonators through a coupling window. Only signals near the resonant frequency of the resonator can pass through, and signals of other frequencies cannot pass through, thereby achieving the filtering effect.

[0004] However, with the update and upgrade of the radio frequency system, the number of required resonators has also increased accordingly, resulting in an increase in the arrangement area of the resonator cavities of the filter. The demand for miniaturization has also led to more and more limited layouts, and even exceeding the limited area. Summary of the Invention

[0005] The embodiments of the present application provide a resonator, which is used to improve the space utilization rate of the resonant cavity, reduce the required number of resonators, and facilitate the arrangement of the cavities of the filter. The embodiments of the present application also provide a corresponding filter and an electronic device.

[0006] In the first aspect of the present application, a resonator is provided. The resonator includes a metal cavity, and a dielectric body and a metal step built in the metal cavity. 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 region and a second region. The first region is attached to the top surface of the metal step, and the second region is the region where the projection of the step through hole on the bottom surface of the dielectric body is located. The head and tail ends of the second region are connected. The first region is covered with a first metal layer, the second region is covered with a second metal layer, and the second metal layer includes a first non-metal region. The surface of the dielectric body includes a third region, which is the region on 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 region and a fifth region. The fourth region is connected to the second region, and the fifth region is the region on the surface of the dielectric through hole except the fourth region. The fourth region is covered with a second metal layer, and the fifth region is covered with a fourth metal layer.

[0007] 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.

[0008] In this application, the metal step is located at the bottom of the metal cavity. The metal step includes a step through-hole that penetrates up and down. The step through-hole penetrates a first distance from the bottom of the metal cavity, and the step through-hole makes the metal shell of the metal cavity not completely enclosed. 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 requirements. The dielectric body can be a non-metallic material such as ceramic. The dielectric body does not contact the metal cavity and only contacts the metal step. The dielectric body includes a dielectric through-hole that penetrates up and down. The dielectric through-hole is enclosed inside the step through-hole, that is, when viewed from the bottom of the step through-hole upwards, a complete dielectric through-hole can be seen.

[0009] 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. The first non-metallic region in this application is an open circuit surface, and the second non-metallic region is a coupling window.

[0010] In this application, there is a region on the bottom surface of the dielectric body that fits 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 can be fixedly connected or not.

[0011] In this 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, the inside and the outside. Outside the resonator, the metal cavity, the metal step, and each metal layer together form a metal coaxial resonator. Inside the resonator, the dielectric body, the dielectric through-hole, each metal layer, and the first non-metallic region together form a dielectric transverse electromagnetic mode (TEM) resonator.

[0012] In this first aspect, the resonator includes a metal cavity and a dielectric body and a metal step built inside the metal cavity. The dielectric body includes a dielectric through-hole that penetrates up and down, and the metal step includes a step through-hole that penetrates up and down. Among them, the surfaces of the dielectric body are all covered with a metal layer, and a non-metallic layer is set as an open circuit surface in the metal layer at the bottom of the dielectric body, and another non-metallic layer is set as a coupling window on the metal layer on the outer surface of the dielectric body. Thus, the metal layer divides the resonator into two parts, the inside and the outside. Outside, the metal cavity, the metal step, and the metal layer together form a metal coaxial resonator. Inside, the dielectric body, the dielectric through-hole, the open circuit surface, and the metal layer together form a dielectric transverse electromagnetic mode resonator, realizing a dual-mode in one cavity, and achieving energy transfer between the two resonators inside and outside through the coupling window, doubling the space utilization rate of the resonant cavity, thereby reducing the required number of resonators and facilitating the cavity arrangement of the filter.

[0013] In a possible implementation of the first aspect, the first non-metallic region is located in at least one of the bottom of the second region or the fourth region.

[0014] In this possible implementation, the number of open surfaces can be multiple, as long as there is an open surface at the bottom of the dielectric TEM mode resonator, which improves the feasibility of the solution.

[0015] 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 the side surface of the dielectric boss is covered with a second metal layer.

[0016] In this possible implementation, a dielectric boss can be additionally provided in the dielectric body, which improves the feasibility of the solution.

[0017] 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, and the sixth region is the region in the second region except the bottom surface of the dielectric boss.

[0018] In this possible implementation, when the dielectric body further includes a dielectric boss, the number of possible arrangement positions of the open surface increases, which improves the feasibility of the solution.

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

[0020] In this possible implementation, the number of coupling windows can be multiple, which improves the feasibility of the solution.

[0021] 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 attached to the third metal layer on the top surface of the dielectric body, and the dielectric through-hole penetrates the dielectric sheet.

[0022] In this possible implementation, since the relative permittivity of the dielectric sheet is relatively 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, enabling the resonant cavity of the metal coaxial resonator to be further reduced, realizing the miniaturization of the metal coaxial resonator, and thus realizing the overall miniaturization of the resonator.

[0023] In a possible implementation of the first aspect, the top surface of the dielectric sheet is covered with a sixth metal layer, and the sixth metal layer contacts the top surface of the metal cavity.

[0024] In this possible implementation, when the dielectric sheet is in contact with the top surface of the metal cavity, the sixth metal layer and the top surface of the metal cavity can adopt a crimping contact method, and adopting the crimping method for contact can further reduce the process difficulty.

[0025] In a possible implementation of the first aspect, 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.

[0026] In this possible implementation, the top surface of the dielectric sheet and the top surface of the metal cavity may not be in contact, which improves the feasibility of the solution.

[0027] 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 at the bottom surface of the stepped through-hole.

[0028] In this possible implementation, the first screw hole can support the insertion of the first screw, and the resonant frequency of the dielectric TEM mode resonator can be adjusted.

[0029] In a possible implementation of the first aspect, the resonator further includes a first screw, and the first screw cooperates with the first screw hole, and the first screw is used for displacement within the first screw hole.

[0030] In this possible implementation, the first screw that cooperates with the first screw hole has been set in the resonator, reducing the assembly error in subsequent matching of the first screw.

[0031] In a possible implementation 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.

[0032] In this possible implementation, the second screw hole can support the insertion of the second screw, and the resonant frequency of the metal coaxial resonator can be adjusted.

[0033] In a possible implementation of the first aspect, the resonator further includes a second screw, and the second screw cooperates with the second screw hole, and the second screw is used for displacement within the second screw hole.

[0034] In this possible implementation, the second screw that cooperates with the second screw hole has been set in the resonator, reducing the assembly error in subsequent matching of the second screw.

[0035] In a possible implementation of the first aspect, the second screw hole extends into the dielectric through-hole.

[0036] In this possible implementation, the length of the second screw hole is increased, and the tuning range for adjusting the resonant frequency of the metal coaxial resonator is also increased.

[0037] In a possible implementation of the first aspect, the cross-sectional shape of the dielectric body is a polygon, or the edges of the cross-section of the dielectric body are curves.

[0038] In this possible implementation, the dielectric body includes at least a top surface, a bottom surface, and side surfaces, and its specific shape can be cylindrical, regular prismatic, irregular prismatic, trapezoidal prismatic, etc., which improves the feasibility of the solution.

[0039] The second aspect of the present application provides a resonator. The resonator cavity includes a metal cavity, and a dielectric body and a metal step disposed inside the metal cavity. The metal step includes a step through hole penetrating up and down. Among them, 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, and the second region is the region where the projection of the step through hole on the bottom surface of the dielectric body is located. 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, and the third region is the 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.

[0040] In this second aspect, the metal layers covering the entire surface of the dielectric body divide the resonator into two parts, the inside and the outside. Outside the resonator, the metal cavity, the metal step, and each metal layer together form a metal coaxial resonator. Inside the resonator, the dielectric body and each metal layer together form a dielectric waveguide resonator. Thus, a single cavity with two modes is realized, and through the second non-metal region as a coupling window, the metal coaxial resonator and the dielectric waveguide resonator are coupled to realize the energy transfer between the two resonators inside and outside, doubling the efficiency of the resonator, which is also equivalent to doubling the space utilization rate of the resonator cavity, thereby reducing the required number of resonators and facilitating the cavity arrangement of the filter.

[0041] 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 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.

[0042] In this possible implementation, the dielectric body can be provided with only the dielectric top hole, or the dielectric bottom hole, or both the dielectric top hole and the dielectric bottom hole at the same time. Both the dielectric top hole and the dielectric bottom hole can reduce the resonance frequency of the dielectric waveguide resonator.

[0043] In a possible implementation of the second aspect, the dielectric body further includes a dielectric boss extending into the step through hole.

[0044] In a possible implementation of the second aspect, the second non-metallic region is located in at least one of the top surface, side surface, or bottom surface of the dielectric body.

[0045] In a possible implementation of the second aspect, the resonator further includes a dielectric sheet, the bottom surface of the dielectric sheet is covered with a fifth metal layer, and the fifth metal layer is attached to the third metal layer on the top surface of the dielectric body.

[0046] In a possible implementation 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.

[0047] In a possible implementation of the second aspect, 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.

[0048] In a possible implementation 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.

[0049] In a possible implementation 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 for displacement within the second screw hole.

[0050] In a possible implementation of the second aspect, the bottom surface of the stepped through hole is closed.

[0051] In a possible implementation of the second aspect, the cross-sectional shape of the dielectric body is a polygon, or the sides of the cross-section of the dielectric body are curves.

[0052] The third aspect of the present application provides a filter, which includes at least one resonator as described in the above first aspect or any possible implementation of the first aspect, and an input port and / or an output port.

[0053] The fourth aspect of the present application provides a filter, which includes at least one resonator as described in the above second aspect or any possible implementation of the second aspect, and an input port and / or an output port.

[0054] The fifth aspect of the present application provides an electronic device, which includes at least one resonator as described in the above first aspect or any possible implementation of the first aspect.

[0055] The sixth aspect of the present application provides an electronic device, which includes at least one resonator as described in the above second aspect or any possible implementation of the second aspect. Description of the Drawings

[0056] Figure 1 It is a schematic diagram of the architecture of the transmitter;

[0057] Figure 2 Schematic diagram of the architecture of the filter;

[0058] Figure 3 Schematic diagram of an embodiment of the resonator provided by the embodiment of the present application;

[0059] Figure 4A Schematic diagram of the first region in the resonator provided by the embodiment of the present application;

[0060] Figure 4B Schematic diagram of the second region in the resonator provided by the embodiment of the present application;

[0061] Figure 4C Schematic diagram of the third region in the resonator provided by the embodiment of the present application;

[0062] Figure 4D Schematic diagram of the fourth region in the resonator provided by the embodiment of the present application;

[0063] Figure 4E Schematic diagram of the fifth region in the resonator provided by the embodiment of the present application;

[0064] Figure 5 Schematic diagram of an embodiment of the resonator provided by the embodiment of the present application;

[0065] Figures 6A - 6E Schematic diagram of an embodiment of the first non-metal region in the resonator provided by the embodiment of the present application;

[0066] Figure 7A and Figure 7B Schematic diagram of an embodiment of the second non-metal region in the resonator provided by the embodiment of the present application;

[0067] Figures 8 - 11 Schematic diagram of an embodiment of the resonator provided by the embodiment of the present application;

[0068] Figures 12A - 12F Three-dimensional schematic diagram of an embodiment of the resonator provided by the embodiment of the present application;

[0069] Figure 13 Schematic diagram of an embodiment of another resonator provided by the embodiment of the present application;

[0070] Figure 14A Schematic diagram of the first region in another resonator provided by the embodiment of the present application;

[0071] Figure 14B Schematic diagram of the second region in another resonator provided by the embodiment of the present application;

[0072] Figure 14C Schematic diagram of the third region in another resonator provided by the embodiment of the present application;

[0073] Figure 15 and Figure 16 is a schematic diagram of another embodiment of a resonator provided by an embodiment of the present application;

[0074] Figure 17A and Figure 17B is a schematic diagram of a second non-metallic region in another resonator provided by an embodiment of the present application;

[0075] Figures 18 - 20 is a schematic diagram of another embodiment of a resonator provided by an embodiment of the present application;

[0076] Figures 21A - 21H is a three-dimensional schematic diagram of another embodiment of a resonator provided by an embodiment of the present application;

[0077] Figure 22 is a schematic diagram of a filter provided by an embodiment of the present application;

[0078] Figure 23 is a schematic diagram of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0079] The embodiments of the present application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Those of ordinary skill in the art can know that with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0080] The terms "first", "second", etc. in the specification, claims and above-mentioned drawings of the present application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments described here can be implemented in an order different from that shown or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0081] The special term "exemplary" here means "serving as an example, embodiment or illustrative". Any embodiment described here as "exemplary" does not have to be construed as superior to or better than other embodiments.

[0082] In addition, for a better illustration of the present application, numerous specific details are provided in the following detailed implementation manners. Those skilled in the art should understand that the present application can also be implemented without some specific details. In some instances, methods, means, elements, and circuits well-known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0083] The application scenarios related to the embodiments of the present application will be illustrated by way of example below.

[0084] With the development of wireless communication technology, the application of filters has become more and more extensive. For example, in a radio frequency system, a filter is used to filter signals of useless frequencies.

[0085] In a base station system, a radio frequency system generally consists of a transmitter and a receiver. Taking the transmitter as an example, as Figure 1 shown, the transmitter includes a modulator, an upconverter, a power amplifier module, a filter, and an antenna, as well as an oscillator 1 coupled to the modulator and an oscillator 2 coupled to the upconverter. The baseband signal is modulated and upconverted into a radio frequency signal, which is amplified by the power amplifier module and filtered by the filter, and then transmitted to the antenna to be radiated into free space.

[0086] The mainstream solution of the resonator currently adopted by the filter is the metal coaxial cavity solution. When a 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 coupling is carried out between the resonators through coupling windows, and only signals near the resonant frequency of the resonator can pass through, while signals of other frequencies cannot pass through, thereby achieving the filtering effect.

[0087] However, with the update and upgrade of the radio frequency system, the number of required resonators also increases accordingly. As Figure 2 shown, this results in an increase in the arranged area of the resonator cavities of the filter. The demand for miniaturization also leads to more and more limited layout, and even exceeds the defined area. Based on this, the embodiments of the present application provide a resonator for improving the space utilization rate of the resonant cavity, reducing the required number of resonators, and facilitating the arrangement of the cavities of the filter. The embodiments of the present application also provide corresponding filters and electronic devices. The following will be described in detail respectively.

[0088] The resonator provided by the embodiments of the present application will be described below in combination with the above application scenarios.

[0089] As Figure 3 shown, the embodiments of the present application provide a resonator. An embodiment of the resonator includes a metal cavity 110, and a dielectric body 120 and a metal step 130 built in the metal cavity 110.

[0090] Among them, the metal cavity 110 can be understood as a metal shell, which forms a hollow cavity inside the metal cavity 110. Both the dielectric body 120 and the metal step 130 are located inside the metal cavity 110, that is, in the hollow cavity.

[0091] The metal step 130 is located at the bottom of the metal cavity 110. The metal step 130 is also made of metal. The metal step 130 includes a step through-hole 131 that penetrates up and down. The step through-hole 131 penetrates a first distance from the bottom of the metal cavity 110. The step through-hole 131 makes the metal shell of the metal cavity 110 not completely enclosed. The first distance is also the height of the metal step 130, and the specific value of the first distance can be determined according to actual needs.

[0092] The dielectric body 120 can be a non-metal material such as ceramic. The dielectric body 120 does not contact the metal cavity 110 and only contacts the metal step 130. The dielectric body 120 includes a dielectric through-hole 121 that penetrates up and down. The dielectric through-hole 121 is enclosed inside the step through-hole 131. That is, when viewed from the bottom of the step through-hole 131 upwards, the complete dielectric through-hole 121 can be seen.

[0093] Specifically, as Figures 4A - 4E (corresponding to showing the first region to the fifth region) shown, the entire surface of the dielectric body 120 and the surface of the dielectric through-hole 121 are both covered with a metal layer. In the 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.

[0094] It should be understood that Figures 4A - 4E is a cross-sectional view. Therefore Figures 4A - 4E the corresponding surfaces are respectively represented by thickened lines in as the first region to the fifth region. It should be noted that Figure 4B is used to represent the second region, and the first non-metal region 140 therein is blocked by the second region. Figure 4C The second non-metal region 150 in also belongs to the third region.

[0095] Among them, the bottom surface of the dielectric body 120 includes a first region and a second region. The first region is in contact with the top surface of the metal step 130, that is, there is a region on the bottom surface of the dielectric body 120 that is in contact with the top surface of the metal step 130, indicating that the dielectric body 120 is placed on the metal step 130. The dielectric body 120 and the metal step 130 can be fixedly connected or not. The second region is the region where the step through hole 131 projects onto the bottom surface of the dielectric body 120, and the head and tail ends of the second region are connected, that is, the second region surrounds / forms an annular region, which also indicates that the dielectric through hole 121 is enclosed inside the step through hole 131, otherwise the step through hole 131 cannot project an annular region on the bottom surface of the dielectric body 120. It should be noted that the first non-metal region 140 is also a region with its head and tail ends connected, that is, the first non-metal region 140 also surrounds / forms an annular region.

[0096] The surface of the dielectric body 120 includes a third region, and the third region is the region on the surface of the dielectric body 120 except for the first region and the second region. That is, in the entire surface of the dielectric body 120, except for the first region and the second region, the rest is the third region. The third region involves the entire top surface, the entire outer side surface, and a part of the bottom surface of the dielectric body 120, and this part of the bottom surface is the bottom surface that has no connection with the metal step 130.

[0097] 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 the first non-metal region 140, and the third metal layer includes the second non-metal region 150. The first non-metal region 140 is an open circuit surface, and the second non-metal region 150 is a coupling window. The open circuit surface and the coupling window will be described in detail later.

[0098] The surface of the dielectric through hole 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 the dielectric through hole 121. The fifth region is the region on the surface of the dielectric through hole 121 except for the fourth region. The fourth region is covered with the 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-metal region 140 can be located on the second region or on the fourth region. The fifth region is covered with a fourth metal layer.

[0099] 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 and coupled metal layers, and their different names are only for distinguishing the regions to which they belong.

[0100] It should be understood that each region referred to in the embodiments of the present application covers the metal layer, and its specific meaning is that the region completely covers the metal layer. For example, the meaning that the second region covers the second metal layer is that the entire second region is covered by the second metal layer. The non-metal regions referred to in the embodiments of the present application may completely cover the metal layer or may only exist in a partial region of the metal layer. For example, the first non-metal region 140 completely covers the second metal layer, and for another example, the second non-metal region 150 only lies in a small part of the third metal layer.

[0101] In the embodiments 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 taken as cylindrical for illustration, but the embodiments of the present application do not limit the specific shapes of the above-mentioned respective structures.

[0102] The entire surface of the dielectric body 120 and the metal layer covering the surface of the dielectric through-hole 121 divide the resonator into an inner part and an outer part. Outside the resonator, the metal cavity 110, the metal step 130, and each metal layer together form a metal coaxial resonator. Inside the resonator, the dielectric body 120, the dielectric through-hole 121, each metal layer, and the first non-metal region 140 together form a dielectric transverse electromagnetic mode (TEM) resonator.

[0103] For the metal coaxial resonator formed outside the resonator, it is similar to a conventional metal coaxial resonator, and the embodiments of the present application will not elaborate on it here. For the dielectric TEM mode resonator formed inside the resonator, the dielectric through-hole 121 can be regarded as a resonant rod. The top region of this resonant rod, that is, the fifth region, covers the fourth metal layer, and the third region located at the top of the dielectric body 120 also covers the third metal layer. The contact of the two metal layers forms a short circuit surface. And the bottom region of this resonant rod, that is, the second region or the fourth region, both cover the second metal layer, and the first non-metal region 140 is arranged on the second metal layer. This first non-metal region 140 forms an open circuit surface. The top of this resonant rod is a short circuit surface (where the magnetic field is the strongest), equivalent to L, and the bottom is an open circuit surface (where the electric field is the strongest), equivalent to C. Therefore, the resonant cavity formed by this resonant rod forms a dielectric TEM mode resonator with LC resonance. Thus, a dual-mode in one cavity is achieved, and through the second non-metal region 150 as a coupling window, the metal coaxial resonator and the dielectric TEM mode resonator are coupled, doubling the efficiency of the resonator, which is also equivalent to doubling the space utilization rate of the resonant cavity, thereby reducing the required number of resonators and facilitating the cavity arrangement of the filter.

[0104] Optionally, the first non-metal region 140 is located in at least one of the bottom of the second region or the fourth region, that is, the number of the first non-metal regions 140 can be multiple, and it is only necessary to ensure that there is an open circuit surface at the bottom of the dielectric TEM mode resonator.

[0105] Optionally, as Figure 5 shown, the dielectric body 120 further includes a dielectric boss 160 extending into the stepped through hole 131, and the dielectric through hole 121 penetrates the dielectric boss 160, that is, the dielectric through hole 121 always penetrates the entire dielectric body 120. The side surface of the dielectric boss 160 is covered with a second metal layer, that is, the first non-metal region 140 can also be located on the side surface of the dielectric boss 160. At this time, the first non-metal region 140 can be located in at least one of the bottom surface, side surface, bottom of the fourth region or the sixth region of the dielectric boss 160. The sixth region ( Figure 5 indicated by the deepened line in) is the region in the second region except the bottom surface of the dielectric boss 160.

[0106] As Figures 6A - 6E shown, various possible positions of the first non-metal region 140 are shown. As Figure 6A shown, when the dielectric body 120 does not include the dielectric boss 160, the first non-metal region 140 is located at the bottom of the fourth region. As Figure 6B shown, when the dielectric body 120 includes the dielectric boss 160, the first non-metal region 140 is located at the bottom of the fourth region. As Figure 6C shown, the first non-metal region 140 is located on the bottom surface of the dielectric boss 160. As Figure 6D shown, the first non-metal region 140 is located on the side surface of the dielectric boss 160. As Figure 6E shown, the first non-metal region 140 is located in the sixth region.

[0107] It should be understood that the above-mentioned various possible positions of the first non-metal region 140 can be combined with each other, that is, there are multiple first non-metal regions 140, and the embodiments of the present application do not limit this.

[0108] Optionally, the second non-metal region 150 is located in at least one of the top surface, side surface or bottom surface of the dielectric body 120. That is, the position of the coupling window is on the top surface, side surface or bottom surface of the dielectric body 120, or is located on two or more of them at the same time. That is, on at least one of the top surface, side surface or bottom surface of the dielectric body 120, at least one region is provided with at least one second non-metal region 150 to realize the energy coupling of the internal and external two resonance modes. The shape of the coupling window can be square, circular, annular or other irregular shapes, as long as a closed region is formed and non-metallized treatment is performed.

[0109] Exemplarily, as Figure 7AAs shown, the second non-metal region 150 is located on the top surface of the dielectric body 120. As Figure 7B shown, the second non-metal region 150 is located on the bottom surface of the dielectric body 120.

[0110] Optionally, as Figure 8 shown, the resonator further includes a dielectric sheet 170. The bottom surface of the dielectric sheet 170 is covered with a fifth metal layer, and the fifth metal layer is attached to the third metal layer on the top surface of the dielectric body 120. The attachment method can 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.

[0111] Since the relative permittivity of the dielectric sheet 170 is relatively large (greater than that of 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, enabling the resonant cavity of the metal coaxial resonator to be further reduced, realizing the miniaturization of the metal coaxial resonator, and thus realizing the overall miniaturization of the resonator.

[0112] Optionally, in the case where the dielectric sheet 170 exists, the dielectric sheet 170 may or may not be in contact with the top surface of the metal cavity 110.

[0113] As Figure 9 shown, 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 embodiments of the present application do not limit the contact method between the sixth metal layer and the top surface of the metal cavity 110, as long as effective contact between the two is ensured.

[0114] It should be understood that when the dielectric sheet 170 is in contact with the top surface of the metal cavity 110, using the crimping method for contact can further reduce the process difficulty.

[0115] Referring together to Figure 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, the first preset value is greater than zero, and the specific value of the first preset value can be determined according to actual needs. The embodiments of the present application do not limit this.

[0116] Optionally, as Figure 10As shown, the bottom surface of the stepped through-hole 131 of the metal step 130 is closed, that is, the entire metal cavity 110 is closed. At this time, the metal cavity 110 may further include a first screw hole 180 extending into the stepped through-hole 131, and the first screw hole 180 is located at the bottom surface of the stepped through-hole 131. And the resonator may further include a first screw (not shown in the figure), the first screw cooperates with the first screw hole 180, and the first screw is used for displacement within the first screw hole 180. At this time, the first screw can be used as a tuning screw. By displacing within the first screw hole 180 and extending into the stepped through-hole 131, the electric field distribution near the open surface of the dielectric TEM mode resonator can be changed by changing the penetration depth of the first screw, thereby changing the equivalent capacitance to adjust the resonant frequency of the dielectric TEM mode resonator.

[0117] In addition, the resonant frequency of the dielectric TEM mode resonator can also be adjusted by using a grinding rod or a grinding head to extend from the stepped through-hole 131 into the dielectric through-hole 121 and grinding the bottom or surface of the dielectric through-hole 121. At this time, the metal cavity 110 may not be provided with the first screw hole 180.

[0118] Optionally, as Figure 11 shown, the metal cavity 110 further includes a second screw hole 190, and the second screw hole 190 is located on the top surface of the metal cavity 110. At this time, the resonator may further include a second screw (not shown in the figure), the second screw cooperates with the second screw hole 190, and the second screw is used for displacement within the second screw hole 190. At this time, the second screw can be used as a tuning screw. By displacing within the second screw hole 190 and extending into the metal cavity 110 or the dielectric through-hole 121, the electric field distribution near the open surface of the metal coaxial resonator can be changed by changing the penetration depth of the second screw, thereby changing the equivalent capacitance to adjust the resonant frequency of the metal coaxial resonator.

[0119] It should be noted that the second screw hole 190 may extend into the dielectric through-hole 121 or may not extend into the dielectric 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.

[0120] Optionally, the cross-sectional shape of the dielectric body 120 is a polygon. Exemplarily, when the cross-sectional shape of the dielectric body 120 is a square, the dielectric body 120 is a regular quadrangular prism at this time. Optionally, the sides of the cross-section of the dielectric body 120 are curves. Exemplarily, when the cross-sectional shape of the dielectric body 120 is a circle, the dielectric body 120 is a cylinder at this time. That is, the dielectric body 120 can be a cylinder, a regular prism, an irregular prism, a trapezoidal prism, etc. The dielectric body 120 only needs to include at least a top surface, a bottom surface, and a side surface. The embodiments of the present application do not limit the specific shape of the dielectric body 120.

[0121] It should be understood that the above Figures 3 - 11 are all cross-sectional views of the resonator provided by the embodiments of the present application. Next, several three-dimensional views of the resonator will be used for illustrative purposes.

[0122] As Figure 12A shown, this resonator can correspond to the resonator shown in Figure 3 As Figure 12B shown, this resonator can correspond to the resonator shown in Figure 7A As Figure 12C shown, this resonator can correspond to the resonator shown in Figure 7B As Figure 12D shown, this resonator can correspond to the resonator shown in Figure 5 As Figure 12E shown, this resonator can correspond to the resonator shown in Figure 8 As Figure 12F shown, this resonator is a regular quadrangular prism, and the cross-sectional shape of its dielectric body 120 is a square. It should be understood that Figures 12A - 12F all resonators include a first screw hole 180 and a second screw hole 190.

[0123] As Figure 13 shown, another embodiment of the resonator provided by the embodiments of the present application includes a metal cavity 210, and a dielectric body 220 and a metal step 230 disposed inside the metal cavity 210.

[0124] Among them, the metal cavity 210 can be understood as a metal shell, and the metal shell 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.

[0125] The metal step 230 is located at the bottom of the metal cavity 210. The metal step 230 includes a step through hole 231 that penetrates up and down. The step through hole 231 penetrates a first distance from the bottom of the metal cavity 210, and the step through hole 231 makes the metal shell of the metal cavity 210 not completely closed. The first distance is also the height of the metal step 230, and the specific value of the first distance can be determined according to actual needs.

[0126] The dielectric body 220 can be a non-metallic material such as ceramic. The dielectric body 220 does not contact the metal cavity 210 and only contacts the metal step 230. The entire surface of the dielectric body 220 is covered with a metal layer. In the embodiments of the present application, the surface of the dielectric body 220 is divided into a first region, a second region, and a third region, and the surface of the dielectric body 220 can also be divided into a top surface, an outer side surface, and a bottom surface.

[0127] Among them, as Figures 14A - 14CAs shown (corresponding to the display of the first region to the third region), the bottom surface of the dielectric body 220 includes a first region and a second region. The first region is in contact with the top surface of the metal step 230, that is, there is a region on the bottom surface of the dielectric body 220 that is in contact 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 can be fixedly connected or not. The second region is the region where the step through hole 231 projects onto the bottom surface of the dielectric body 220.

[0128] The surface of the dielectric body 220 includes a third region. The third region is the region on the surface of the dielectric body 220 other than the first region and the second region, that is, in the entire surface of the dielectric body 220, except for the first region and the second region, the rest is the third region. The third region involves the entire top surface, the entire outer side surface, and a part of the bottom surface of the dielectric body 220. This part of the bottom surface is the bottom surface that has no connection with the metal step 230.

[0129] It should be understood that Figures 14A - 14C is a cross-sectional view. Therefore Figures 14A - 14C in, the corresponding surfaces are represented by thickened lines as the first region to the third region respectively. It should be noted that Figure 14C in, the second non-metal region 240 also belongs to the third region.

[0130] 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 the second non-metal region 240. The second non-metal region 240 is a coupling window, which will be described in detail later.

[0131] In the embodiments of the present application, the first metal layer, the second metal layer, and the third metal layer can be understood as the same and coupled metal layers, and their different names are only for distinguishing the regions to which they belong.

[0132] It should be understood that each region referred to in the embodiments of the present application covers a metal layer, and its specific meaning is that this region completely covers this metal layer. For example, the meaning that the second region is covered with the second metal layer is that the entire second region is covered by the second metal layer.

[0133] In the embodiments of the present application, the metal cavity 210, the dielectric body 220, the metal step 230, and the step through hole 231 are all taken as cylindrical for illustration, but the embodiments of the present application do not limit the specific shapes of the above-mentioned various structures.

[0134] A metal layer covering the entire surface of the dielectric body 220 divides the resonator into an inner and an outer part. Outside the resonator, the metal cavity 210, the metal step 230, and the various metal layers together form a metal coaxial resonator. Inside the resonator, the dielectric body 220 and the various metal layers together form a dielectric waveguide resonator. The two ends in the waveguide transmission direction are closed by metal layers, and the closed cavity is filled with the dielectric body 220. Because the relative dielectric constant of the dielectric body 220 is relatively high, the resonance frequency can be reduced. After the electromagnetic field of a specific frequency is incident in the closed cavity, it forms a standing wave distribution after being reflected by the various metal layers, thus forming a dielectric waveguide resonator. Thus, a single cavity with two modes is realized, and through the second non-metal region 240 as a coupling window, the metal coaxial resonator and the dielectric waveguide resonator are coupled, doubling the efficiency of the resonator, which is also equivalent to doubling the space utilization rate of the resonance cavity, thereby reducing the required number of resonators and facilitating the cavity arrangement of the filter.

[0135] Optionally, as Figure 15 shown, the dielectric body 220 includes a dielectric top hole 250 and / or a dielectric bottom hole 260. The dielectric top hole 250 is located at the top of the dielectric body 220, and the bottom surface of the dielectric top hole 250 is closed. The dielectric bottom hole 260 is located at the bottom of the dielectric body 220, and the top surface of the dielectric bottom hole 260 is closed. The surfaces of the dielectric top hole 250 and the dielectric bottom hole 260 are covered with a fourth metal layer.

[0136] Among them, the dielectric body 220 can be provided with only the dielectric top hole 250, or only the dielectric bottom hole 260, or both the dielectric top hole 250 and the dielectric bottom hole 260 can be provided. Both the dielectric top hole 250 and the dielectric bottom hole 260 can reduce the resonance 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 surfaces of the dielectric body 220.

[0137] Optionally, as Figure 16 shown, the dielectric body 220 further includes a dielectric boss 270 extending into the step through hole 231.

[0138] Optionally, the second non-metal region 240 is located in at least one of the top surface, side surface, or bottom surface of the dielectric body 220. That is, the position of the coupling window is on the top surface, side surface, or bottom surface of the dielectric body 220, or simultaneously on two or more of these surfaces. That is, on at least one of the top surface, side surface, or bottom surface of the dielectric body 220, at least one second non-metal region 240 is provided to achieve the energy coupling of the two internal and external resonance modes. The shape of the coupling window can be square, circular, annular, or other irregular shapes, as long as it forms a closed area and is non-metallized.

[0139] Exemplarily, as Figure 17AAs shown, the second non-metal region 240 is located on the top surface of the dielectric body 220. As Figure 17B shown, the second non-metal region 240 is located on the bottom surface of the dielectric body 220.

[0140] Optionally, as Figure 18 shown, the resonator further includes a dielectric sheet 280. The bottom surface of the dielectric sheet 280 is covered with a fifth metal layer, and the fifth metal layer is coupled to the third metal layer on the top surface of the dielectric body 220. The coupling method can be welding or co-firing, etc., as long as an effective contact is maintained between the third metal layer and the fifth metal layer. The dielectric through-hole penetrates the dielectric sheet 280, that is, the dielectric through-hole not only penetrates the entire dielectric body 220 but also penetrates the dielectric sheet 280.

[0141] Since the relative dielectric constant of the dielectric sheet 280 is relatively 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, enabling the resonant cavity of the metal coaxial resonator to be further reduced, realizing the miniaturization of the metal coaxial resonator, and thus realizing the overall miniaturization of the resonator.

[0142] Optionally, in the presence of the dielectric sheet 280, the dielectric sheet 280 may or may not be in contact with the top surface of the metal cavity 210.

[0143] As Figure 19 shown, 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 embodiments of the present application do not limit the contact method between the sixth metal layer and the top surface of the metal cavity 210, as long as an effective contact between the two is ensured.

[0144] It should be understood that when the dielectric sheet 280 is in contact with the top surface of the metal cavity 210, using the crimping method for contact can further reduce the process difficulty.

[0145] With reference to Figure 18 collectively, 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. The first preset value is greater than zero, and the specific value of the first preset value can be determined according to actual needs. The embodiments of the present application do not limit this.

[0146] Optionally, as Figure 20As shown, the metal cavity 210 further includes a second screw hole 290 located on the top surface of the metal cavity 210. At this time, the resonator may further include a second screw (not shown in the figure). The second screw cooperates with the second screw hole 290 and is used for displacement within the second screw hole 290. At this time, the second screw can be used as a tuning screw. By displacing within the second screw hole 290 and penetrating into the metal cavity 210 or the dielectric through hole, the resonant frequency of the metal coaxial resonator can be adjusted.

[0147] When the dielectric body 220 includes a dielectric top hole 250 and a dielectric bottom hole 260, the second screw can penetrate from the second screw hole 290 into the interior of the resonator, that is, into the dielectric top hole 250, increasing the debugging range of the resonant frequency of the metal coaxial resonator. Specifically, the surface (sidewall) of the dielectric top hole 250 is a short-circuit surface, and the top is an open-circuit surface. By changing the penetration depth of the second screw, the capacitance C can be reduced to increase the resonant frequency, or the current path can be increased to increase the inductance L and reduce the resonant frequency.

[0148] In addition, the bottom or surface of the dielectric bottom hole 260 can be polished by a grinding rod or a grinding head penetrating from the stepped through hole 231 into the dielectric bottom hole 260 to realize the debugging of the resonant frequency of the dielectric waveguide resonator.

[0149] It should be understood that the dielectric body 220 can be provided with only a stepped top hole, or only a stepped bottom hole, or both a stepped top hole and a stepped bottom hole can be provided, or neither can be provided. In any of the above cases, the resonant cavity can generate a dielectric waveguide resonance mode inside the dielectric. Whether to provide a stepped top hole or a stepped bottom hole only affects the debugging range of the resonant frequency of the resonator.

[0150] 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.

[0151] It should be noted that the second screw hole 290 can extend into the dielectric through hole or not. 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 embodiments of the present application do not limit this.

[0152] Optionally, the cross-sectional shape of the dielectric body 220 is a polygon. Exemplarily, when the cross-sectional shape of the dielectric body 220 is a square, the dielectric body 220 is a regular quadrangular prism. Optionally, the sides of the cross-section of the dielectric body 220 are curves. Exemplarily, when the cross-sectional shape of the dielectric body 220 is a circle, the dielectric body 220 is a cylinder. That is, the dielectric body 220 can be cylindrical, regular prismatic, irregular prismatic, trapezoidal prismatic, etc. The dielectric body 220 only needs to include at least a top surface, a bottom surface, and a side surface. The specific shape of the dielectric body 220 is not limited in the embodiments of the present application.

[0153] It should be understood that the above Figures 13 - 20 are all cross-sectional views of the resonator provided by the embodiments of the present application. Next, several three-dimensional views of the resonator will be used for illustration.

[0154] As Figure 21A and Figure 21B shown, the resonator can correspond to the Figure 15 shown resonant cavity. As Figure 21C shown, the resonator can also correspond to the Figure 15 shown resonator, but the dielectric bottom hole 260 is not provided in this resonator. As Figure 21D shown, the resonant cavity can correspond to Figure 17A As Figure 21E shown, the resonator can correspond to Figure 17B As Figure 21F shown, the resonator can correspond to Figure 16 As Figure 21G shown, the resonator can correspond to Figure 18 As Figure 21H shown, the resonator is a regular quadrangular prism, and the cross-sectional shape of its dielectric body 220 is a square. It should be understood that Figures 21A - 21H all the resonators include the second screw hole 290.

[0155] Summarizing the above two embodiments, it can be seen that compared with the existing metal coaxial resonator, the resonator provided by the embodiments of the present application realizes a dielectric TEM mode resonator or a dielectric waveguide resonator inside the metal coaxial resonator without increasing the size, achieving a dual-mode in one cavity, doubling the efficiency of the resonator, and also doubling the space utilization rate of the resonant cavity, thereby reducing the required number of resonators and facilitating the cavity arrangement of the filter.

[0156] It should be understood that there are various possible implementation manners for the resonator provided by the embodiments of the present application, and the above various possible implementation manners can be combined with each other. The embodiments of the present application do not limit this.

[0157] The resonator provided by the embodiments of the present application has been introduced above. Next, the filter and the electronic device provided by the embodiments of the present application will be introduced with reference to the drawings.

[0158] As shown in Figure 22 the filter, the filter uses the resonator provided by the embodiment of the present application, that is Figure 22 the three resonators shown in Figure 2 are the resonators provided by the embodiment of the present application. The filter can produce the same effect as Figure 22 the filter shown in

[0159] As shown in Figure 23 the embodiment of the present application provides an electronic device, the electronic device includes a filter, the filter includes at least one resonator, and an input port and / or an output port.

[0160] The electronic device is any device that requires a filter, such as a transmitter or a receiver in a communication device, or an electronic device such as a sensor, an audio-video processor, etc.

[0161] The filter includes at least one resonator. Exemplarily, the filter includes resonator 1, resonator 2, and resonator 3. After the input signal enters resonator 1 from the input port, it is output from the output port of resonator 3.

[0162] Optionally, resonator 1 to resonator 3 are all the resonators Figures 3 - 12F described in the above embodiments.

[0163] Optionally, resonator 1 to resonator 3 are all the resonators Figures 13 - 21H described in the above embodiments.

[0164] Optionally, resonator 1 is the resonator Figures 3 - 12F described in the above embodiments, resonator 2 and resonator 3 are the resonators Figures 13 - 21H described in the above embodiments. Or resonator 1 and resonator 2 are the resonators Figures 3 - 12F described in the above embodiments, resonator 3 is the resonator Figures 13 - 21H described in the above embodiments. It should be understood that the embodiments of the present application do not limit the types and quantities of the resonators provided in the filter.

[0165] Optionally, the input port and / or the output port can be coupled to the resonator provided by the embodiment of the present application, or can be coupled to other types of resonators, and the other types of resonators are then coupled to the resonator provided by the embodiment of the present application. For example, resonator 1 and resonator 3 are Figure 2 the metal coaxial resonators shown in Figures 3 - 12FThe described resonator or in the above embodiments Figures 13 - 21H The described resonator.

[0166] Those of ordinary skill in the art will recognize that the structural units of each example described in connection with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the embodiments of this application.

[0167] In several embodiments provided in this application, it should be understood that the disclosed structure can be implemented in other ways. For example, the above-described embodiments are merely illustrative. For example, the division of the structure may have other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another structure, or some features can be ignored. One can select some or all of the structures according to actual needs to achieve the purpose of the solution of this embodiment. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, indirect couplings or communication connections of structures or units, and can be in electrical, mechanical or other forms.

[0168] In addition, the various structures in the embodiments of this application can be integrated into one structure, or each structure can exist physically alone, or two or more structures can be integrated into one structure.

[0169] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and 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 this application.

Claims

1. A resonator, characterized in that, it includes a metal cavity, and a dielectric body and a metal step built in the metal cavity. 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. Among them, 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 on the bottom surface of the dielectric body. The head and tail ends of the second region are connected. The first region is covered with a first metal layer, the second region is covered with a second metal layer, and the second metal layer includes a first non-metal region; the surface of the dielectric body includes a third region, which is the region on 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-metal region; the surface of the dielectric through-hole includes a fourth region and a fifth region. The fourth region is connected to the second region. The fifth region is the region on the surface of the dielectric through-hole other than the fourth region. The fourth region is covered with the second metal layer, and the fifth region is covered with a fourth metal layer.

2. The resonator according to claim 1, characterized in that, the first non-metal region is located in at least one of the 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 step through-hole. The dielectric through-hole penetrates the dielectric boss, and the 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-metal region is located in at least one of the bottom surface, side surface, the bottom of the fourth region or a sixth region of the dielectric boss. The sixth region is the region in the second region other than the bottom surface of the dielectric boss.

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

6. The resonator according to any one of claims 1-5, characterized in that, the resonator further includes a dielectric sheet. The bottom surface of the dielectric sheet is covered with a fifth metal layer, and the fifth metal layer is in contact with the third metal layer on the top surface of the dielectric body. 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 1-8, 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 at the bottom surface of the stepped through-hole.

10. The resonator according to claim 9, wherein, the resonator further includes a first screw, the first screw is engaged with the first screw hole, and the first screw is configured to displace within the first screw hole.

11. The resonator according to any one of claims 1-10, wherein, the metal cavity further includes a second screw hole, and the second screw hole is located at the top surface of the metal cavity.

12. The resonator according to claim 11, wherein, the resonator further includes a second screw, the second screw is engaged with the second screw hole, and the second screw is configured to displace within the second screw hole.

13. The resonator according to claim 11 or 12, wherein, the second screw hole extends into the dielectric through-hole.

14. The resonator according to any one of claims 1-13, wherein, the cross-sectional shape of the dielectric body is polygonal, or the edges of the cross-section of the dielectric body are curved.

15. A resonator, wherein, it includes a metal cavity, and a dielectric body and a metal step disposed within the metal cavity. The metal step includes a stepped through-hole that penetrates up and down. Among them, 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, and the second region is the region where the projection of the stepped through-hole on the bottom surface of the dielectric body is located. 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, and the third region is the region on 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-metal region.

16. The resonator according to claim 15, wherein, 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 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.

17. The resonator according to claim 15 or 16, wherein, the dielectric body further includes a dielectric boss extending into the stepped through-hole.

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

19. The resonator according to any one of claims 15-18, wherein, the resonator further includes a dielectric sheet, and the bottom surface of the dielectric sheet is covered with a fifth metal layer, and the fifth metal layer is in contact with the third metal layer on the top surface of the dielectric body.

20. The resonator according to claim 19, wherein, 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, wherein, 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 15-21, wherein, the metal cavity further includes a second screw hole located on the top surface of the metal cavity.

23. The resonator according to claim 22, wherein, the resonator further includes a second screw, and the second screw is engaged with the second screw hole and is used for displacement within the second screw hole.

24. The resonator according to any one of claims 15-23, wherein, the bottom surface of the stepped through hole is closed.

25. The resonator according to any one of claims 15-24, wherein, the cross-sectional shape of the dielectric body is a polygon, or the edges of the cross-section of the dielectric body are curves.

26. A filter, wherein, the filter includes at least one resonator according to any one of claims 1-25, and an input port and / or an output port.

27. An electronic device, wherein, the electronic device includes a resonator according to any one of claims 1-25.

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