WO2022001856A1

WO2022001856A1 - Dielectric filter antenna, electronic device, and antenna array

Info

Publication number: WO2022001856A1
Application number: PCT/CN2021/102294
Authority: WO
Inventors: 邹孟; 石晶
Original assignee: 华为技术有限公司
Priority date: 2020-06-29
Filing date: 2021-06-25
Publication date: 2022-01-06
Also published as: KR20230025489A; CN113937481A; EP4170820A1; JP2023532099A; EP4170820A4; CN113937481B

Abstract

Provided are a dielectric filter antenna, an electronic device, and an antenna array. The dielectric filter antenna comprises a dielectric antenna and at least one layer of a dielectric resonant cavity, wherein the dielectric antenna is located at the top layer; the at least one layer of the dielectric resonant cavity is located below the dielectric antenna; and energy coupling is carried out between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna. The dielectric antenna and the dielectric resonant cavity are made of ceramic dielectrics with a high dielectric constant. In the present application, energy coupling is carried out between the dielectric antenna of the dielectric filter antenna and the dielectric resonant cavity adjacent to the dielectric antenna, such that a transmission line or a matching circuit is avoided, insertion loss is avoided, the size thereof is small, and the echo performance is good.

Description

Dielectric Filter Antennas, Electronics and Antenna Arrays

This application claims the priority of the Chinese patent application with the application number 202010602533.2 and the invention title "Dielectric Filter Antenna, Electronic Device and Antenna Array", which was submitted to the State Intellectual Property Office on June 29, 2020, the entire contents of which are incorporated by reference in in this application.

technical field

The present application relates to the field of antennas, and more particularly, to a dielectric filter antenna, an electronic device and an antenna array.

Background technique

With the development of modern wireless communication technology, communication systems are becoming more and more miniaturized, integrated and multifunctional. Correspondingly, communication equipment has higher and higher requirements for RF front-end circuits. Antennas and filters are the two key components of RF front-end circuits. In the existing solution, the antenna and the filter are designed independently, and the two need to be cascaded together through a transmission line or a matching circuit to perform impedance matching, and then work in coordination. Additional transmission lines or matching circuits are bound to increase the size of the overall antenna system, degrade the performance of the overall antenna system, and generate additional transmission losses.

SUMMARY OF THE INVENTION

The present application provides a dielectric filter antenna, an electronic device and an antenna array, which can avoid the use of transmission lines or matching circuits, have no insertion loss, are small in size and have good return performance.

In a first aspect, a dielectric filter antenna is provided, comprising a dielectric antenna and at least one layer of dielectric resonant cavity, the dielectric antenna is located on the top layer, at least one layer of dielectric resonant cavity is located below the dielectric antenna, the dielectric antenna and the dielectric resonator adjacent to the dielectric antenna Energy coupling is performed between the cavities, wherein the materials of the dielectric antenna and the dielectric resonator are high dielectric constant ceramic dielectrics.

The dielectric filter antenna of the first aspect includes a dielectric antenna located on the top layer and at least one layer of dielectric resonant cavities located below the dielectric antenna. Energy coupling is performed between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna, avoiding the use of transmission lines or matching circuits. , no insertion loss, small size and good return performance.

The dielectric antenna of the dielectric filter antenna of the first aspect serves both as an antenna and as the last-stage resonant cavity of the dielectric filter, and forms a dielectric filter together with at least one layer of dielectric resonant cavities. In other words, a dielectric filter antenna is both an antenna and a filter. The dielectric filter antenna of the first aspect can realize the antenna radiation function while realizing the filter function.

In the dielectric filter antenna of the first aspect, the filter structure, the centimeter structure and the radiation structure are co-designed, which can avoid the deterioration of the echo at the input port of the filter due to the cascade effect in the traditional solution.

The dielectric filter antenna of the first aspect may be of a stacked design. Through the stacked design, the transmission line or matching circuit between the filter and the antenna can be avoided, that is, the path of the feeding network can be shortened, thereby reducing the overall insertion loss.

The size of the dielectric antenna in the dielectric filter antenna of the first aspect is greatly reduced. There is no need to use a transmission line or a matching circuit for connection between the dielectric antenna and at least one layer of the dielectric resonant cavity, so as to avoid insertion loss caused by the use of the transmission line or the matching circuit. The integrated design of the filter and the antenna has a compact overall structure, which can effectively reduce the structure of the antenna system and greatly reduce the size of the antenna system, which is more in line with the development requirements of miniaturization, integration and high performance of the antenna system.

In the dielectric filter antenna of the first aspect, both the filter and the antenna are made of high dielectric constant ceramic dielectric, which can effectively reduce the structure size.

In a possible implementation manner of the first aspect, the entire surface of each dielectric resonant cavity in the at least one layer of dielectric resonant cavities has a metal coating. In this possible implementation manner, plating a metal layer on the entire surface of the dielectric resonant cavity can prevent the energy leakage of the resonant cavity and improve the performance of the dielectric resonant cavity.

In a possible implementation manner of the first aspect, a part of the surface of the dielectric antenna has a metal plating layer. In this possible implementation manner, a metal layer is plated on part of the surface of the dielectric antenna, so that the frequency of the dielectric antenna can be adjusted.

In the above possible implementation manners, the metal coating material may be silver, gold or tin, etc., which is not limited in this application.

In a possible implementation manner of the first aspect, a gap, a probe or a surface provided on the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna is passed between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna. The metal layer performs energy coupling. In this possible implementation, according to the shape, size and relative position of the dielectric antenna and the dielectric resonator, one or a combination of the slot, the probe or the surface metal layer can be used to complete the connection between the dielectric antenna and the dielectric resonator. Energy coupling can avoid insertion loss due to the use of transmission lines or matching circuits.

In a possible implementation manner of the first aspect, the bottom surface of the dielectric antenna is provided with a first slot inward, the top surface of the dielectric resonant cavity adjacent to the dielectric antenna is provided with a second slot inward, and the first slot is connected to the second slot. The positions of the slots are aligned, and energy coupling is performed between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna through the first slot and the second slot.

In a possible implementation manner of the first aspect, the bottom surface of the dielectric antenna is provided with a first probe inward, the top surface of the dielectric resonant cavity adjacent to the dielectric antenna is provided with a second probe inward, and the first probe Aligned with the position of the second probe, energy coupling is performed between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna through the first probe and the second probe.

In the previous possible implementation manner, the first probe and the second probe are both metallized through holes, and the first probe and the second probe are connected by a pad.

In a possible implementation manner of the first aspect, the side surface of the dielectric antenna has a surface metal layer, the top surface of the dielectric resonant cavity adjacent to the dielectric antenna is provided with a probe inward, the positions of the surface metal layer and the probe are aligned, and the dielectric The energy coupling between the antenna and the dielectric cavity adjacent to the dielectric antenna is carried out through the surface metal layer and the probe.

In the previous possible implementation manner, the probes are metallized through holes, and the probes and the surface metal layer are connected by pads.

In a possible implementation manner of the first aspect, the dielectric antenna is a dual-polarized antenna. In this way, a dual-polarized dielectric filter antenna can be formed.

In a second aspect, an electronic device is provided, including the first aspect and the dielectric filter antenna of any possible implementation manner of the first aspect.

In a third aspect, an antenna array is provided, including the dielectric filter antenna of the first aspect and any possible implementation manner of the first aspect, and a plurality of dielectric filter antennas form an array according to horizontal and/or vertical directions. In the third aspect, the antenna array has a small particle size and a large degree of freedom of layout.

In a possible implementation manner of the third aspect, the antenna array is applied in a network device, such as a base station.

Description of drawings

Figure 1 is a schematic diagram of the connection between the antenna and the filter using a transmission line.

Figure 2 is a schematic diagram of an antenna and filter.

FIG. 3 is a schematic diagram of a dielectric filter antenna provided by an embodiment of the present application.

FIG. 4 is a schematic diagram of a dielectric filter antenna provided by an embodiment of the present application.

FIG. 5 is a schematic diagram of a dielectric filter antenna provided by an embodiment of the present application.

FIG. 6 is a schematic diagram of a dielectric filter antenna provided by an embodiment of the present application.

FIG. 7 is a schematic diagram of a dual-polarized dielectric filter antenna according to an embodiment of the present application.

FIG. 8 is a comparison diagram of the echo performance of the dielectric filter antenna according to the embodiment of the present application and the existing antenna.

detailed description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

First, the existing antennas and filters are briefly explained.

In the existing solution, the antenna and the filter are independently designed and processed as two components according to the agreed port characteristic impedance. Figure 1 is a schematic diagram of the connection between the antenna and the filter using a transmission line (which may be in a module). As shown in FIG. 1 , the filter 110 has an input port 112 and an output port 114 , the antenna 120 has an input port 122 , one end of the transmission line 130 is connected to the output port 114 of the filter 110 , and the other end is connected to the input port 122 of the antenna 120 . Among them, the transmission line can be replaced with a matching circuit (also known as a feeding circuit). The antenna and filter are independently designed and processed according to the agreed port characteristic impedance, for example, 50 ohms. The port characteristic impedance of the two devices, the filter and the antenna, cannot be completely equal to the agreed port characteristic impedance (50 ohms) within the operating bandwidth. The echo performance at the input port 112 of the filter will be severely degraded when the two are cascaded with a transmission line or a matching circuit. In addition, a transmission line or matching circuit is required between the filter and the antenna, which causes insertion loss, which in turn increases the loss of the antenna system.

Figure 2 is a schematic diagram of an antenna and filter. As shown in FIG. 2, the passive components of the RF front-end circuit in the existing solution are composed of three parts: a filter 210, a transmission line (or a matching circuit) and an antenna 220 (in FIG. 2, the antenna 220 contains a transmission line or a matching circuit). , many components are not conducive to miniaturization. In addition, in the existing solution, the working bandwidth of the filter and the antenna needs to be larger than the working bandwidth of the antenna system. Since the bandwidth of the antenna is proportional to the size of the antenna, it is difficult to miniaturize the antenna.

Based on the above problems, the present application provides a dielectric filter antenna, an electronic device and an antenna array.

FIG. 3 is a schematic diagram of a dielectric filter antenna 300 provided by an embodiment of the present application. In Fig. 3, A is a schematic diagram, and B is a perspective view. As shown in FIG. 3 , the dielectric filter antenna 300 includes a dielectric antenna 310 and at least one layer of dielectric resonant cavity 320. The dielectric antenna 310 is located on the top layer, and at least one layer of dielectric resonant cavity 320 is located under the dielectric antenna 310. Energy coupling is performed between adjacent dielectric resonators 322, wherein the materials of the dielectric antenna 310 and the dielectric resonator 320 are high dielectric constant ceramic dielectrics.

The dielectric filter antenna provided in this embodiment of the present application includes a dielectric antenna located on the top layer and at least one layer of dielectric resonant cavities located below the dielectric antenna. Energy coupling is performed between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna, avoiding the use of transmission lines or Matching circuit, no insertion loss, small size and good return performance.

In the embodiment of the present application, the dielectric antenna serves as both an antenna and a last-stage resonant cavity of a dielectric filter, and forms a dielectric filter together with at least one layer of dielectric resonant cavities. In other words, the dielectric filter antenna of the embodiment of the present application is both an antenna and a filter. The filter is composed of a plurality of resonant cavities (resonators). In the embodiment of the present application, the last stage of the resonant cavity is realized by a dielectric antenna, and the remaining resonant cavities are realized by a dielectric resonant cavity. The dielectric filter antenna of the embodiment of the present application is composed of more than or equal to two layers of dielectric blocks (dielectric antennas or dielectric resonant cavities), the top layer is a dielectric antenna, and the remaining layers are dielectric resonant cavities. The dielectric filter antenna provided by the embodiment of the present application can realize the antenna radiation function while realizing the filter function.

In the embodiments of the present application, the filter structure (filter), the centimeter structure (transmission line or matching circuit), and the radiation structure (antenna) are co-designed, which can avoid the echo deterioration of the input port of the filter caused by the cascade effect in the traditional solution. condition. The S parameters (for example, |S11|) of the dielectric filter antenna of the embodiments of the present application are significantly improved, and the radiated power gain of the antenna system is also significantly increased.

The dielectric filter antenna of the embodiment of the present application may be designed in a stacked manner. Through the stacked design, the transmission line or matching circuit between the filter and the antenna can be avoided, that is, the path of the feeding network can be shortened, thereby reducing the overall insertion loss.

The working bandwidth of the dielectric antenna in the embodiments of the present application may be much lower than the working bandwidth of the antenna system, while the bandwidth of the traditional antenna must be larger than the working bandwidth of the antenna system. Therefore, the size of the dielectric antenna of the embodiment of the present application is greatly reduced. There is no need to use a transmission line or a matching circuit for connection between the dielectric antenna and at least one layer of the dielectric resonant cavity, so as to avoid insertion loss caused by the use of the transmission line or the matching circuit. The integrated design of the filter and the antenna has a compact overall structure, which can effectively reduce the structure of the antenna system and greatly reduce the size of the antenna system, which is more in line with the development needs of miniaturization, integration and high performance of the antenna system.

It should be understood that in this application, high dielectric constant refers to a higher dielectric constant that can be applied to dielectric antennas or dielectric filters. For example, the dielectric constant can be higher than 6 or higher than 8, etc., but this application does not exclude The dielectric constant is less than or equal to 6 or less than or equal to 8, as long as the filtering and antenna radiation requirements can be met.

It should also be understood that in the present application, the high dielectric constant ceramic medium may include, but is not limited to _{, ceramic materials whose main components are barium titanate (BaTiO 3} ), ceramic materials _{whose main components are barium carbonate (BaCO 3} ), BaO-Ln ₂ O ₃ - Ceramic materials such as TiO ₃ series ceramic materials, composite perovskite series ceramic materials or lead-based perovskite series ceramic materials, or other similar ceramic materials, are not limited in this application. In the present application, both the filter and the antenna are made of high dielectric constant ceramic medium, which can effectively reduce the structure size.

In some embodiments of the present application, the dielectric antenna in the dielectric filter antenna may be a square cylinder or a cylinder, and the dielectric resonant cavity may also be a square cylinder or a cylinder. The size of the dielectric antenna may be greater than or equal to the size of the dielectric resonant cavity, or may be smaller than the size of the dielectric resonant cavity, which is not limited in this application.

In some embodiments of the present application, the entire surface of each dielectric resonant cavity in the at least one layer of dielectric resonant cavities may have a metal coating. Coating a metal layer on the entire surface of the dielectric resonant cavity can prevent the energy leakage of the resonant cavity and improve the performance of the dielectric resonant cavity.

In some embodiments of the present application, a part of the surface of the dielectric antenna may have a metal plating layer. The frequency of the dielectric antenna can be adjusted by coating a metal layer on part of the surface of the dielectric antenna. Part of the surface may be the whole or part of the top surface of the dielectric antenna, or the whole or part of all or part of the side surface of the dielectric antenna. For example, a part of the surface of the top surface of the dielectric antenna 310 of the dielectric filter antenna 300 shown in FIG. 3 has a metal plating layer 312 . The surface of the dielectric antenna may also not be provided with a metal plating layer, which is not limited in this application.

In some embodiments of the present application, each layer of the dielectric block may be sintered together by metal plating on the surface. The entire surface of the dielectric resonant cavity may be provided with a metal coating, and the bottom surface of the dielectric antenna may be provided with a metal coating to facilitate sintering.

The metal coating material of each embodiment of the present application may be silver, gold, tin, etc., which is not limited in the present application.

In some embodiments of the present application, energy is carried out between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna through a slot, a probe or a surface metal layer disposed on the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna. coupling. Wherein, according to the shape, size and relative position of the dielectric antenna and the dielectric resonator, one or a combination of the slot, the probe or the surface metal layer can be used to complete the energy coupling between the dielectric antenna and the dielectric resonator.

In some specific embodiments, the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna can perform energy coupling through a slot. FIG. 4 is a schematic diagram of a dielectric filter antenna 400 provided by an embodiment of the present application. As shown in FIG. 4 , the bottom surface of the dielectric antenna 410 is provided with a first slot 414 inward, the top surface of the dielectric resonant cavity 420 adjacent to the dielectric antenna is provided with a second slot 424 inward, the first slot 414 and the second slot 424 The positions of the dielectric antenna 410 and the dielectric resonant cavity 420 adjacent to the dielectric antenna are aligned, and energy coupling is performed through the first slot 414 and the second slot 424 .

In the structure shown in Figure 4, the sintered surface (the bottom surface of the dielectric antenna and the dielectric resonator adjacent to the dielectric antenna (the bottom surface of the dielectric antenna) and the dielectric resonant cavity adjacent to the dielectric antenna (the penultimate dielectric resonant cavity) The top surface of the adjacent dielectric resonator), and an unmetallized slot is set to realize energy coupling. The slits may be elongated slits as shown in FIG. 4 . The first slot 414 may not penetrate the dielectric antenna. The second slot 424 may not penetrate the dielectric resonant cavity adjacent to the dielectric antenna. The specific form of the slot may be a square hole or a round hole, or other shapes, which are not limited in this application.

In some specific embodiments, the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna can be energy coupled through the probe. FIG. 5 is a schematic diagram of a dielectric filter antenna 500 provided by an embodiment of the present application. As shown in FIG. 5 , the bottom surface of the dielectric antenna 510 is provided with a first probe 514, and the top surface of the dielectric resonant cavity 520 adjacent to the dielectric antenna is provided with a second probe 524 inward. The positions of the two probes 524 are aligned, and the first probe 514 and the second probe 524 perform energy coupling between the dielectric antenna 510 and the dielectric resonant cavity 520 adjacent to the dielectric antenna 510 .

The structure shown in Figure 5, on the sintered surface (the bottom surface of the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna) and the dielectric resonant cavity (the penultimate-stage dielectric resonant cavity) adjacent to the dielectric antenna (the bottom surface of the dielectric antenna and the phase opposite to the dielectric antenna) The top surface of the adjacent dielectric resonant cavity), and the probe is set to realize energy coupling. Specifically, the first probes 514 and the second probes 524 may both be metallized through holes, and the first probes 514 and the second probes 524 are connected by pads. The probes may be elongated as shown in FIG. 5 . The first probe 514 may not penetrate the dielectric antenna. The second probe 524 may not penetrate the dielectric cavity adjacent to the dielectric antenna 510 .

In some specific embodiments, the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna may perform energy coupling in the form of probe + surface metal layer. FIG. 6 is a schematic diagram of a dielectric filter antenna 600 provided by an embodiment of the present application. As shown in FIG. 6 , the side surface of the dielectric antenna 610 has a surface metal layer 614, and the top surface of the dielectric resonant cavity 620 adjacent to the dielectric antenna 610 is provided with a probe 624 inward. The positions of the surface metal layer 614 and the probe 624 are aligned, and the dielectric Energy coupling is performed between the antenna 610 and the dielectric resonant cavity 620 adjacent to the dielectric antenna 610 through the surface metal layer 614 and the probe 624 .

In the structure shown in Fig. 6, on the sintered surface (the bottom surface of the dielectric antenna and the dielectric resonator adjacent to the dielectric antenna (the bottom surface of the dielectric antenna) and the dielectric resonant cavity adjacent to the dielectric antenna (the penultimate dielectric resonant cavity) The top surface of the adjacent dielectric resonant cavity) is inward, and the surface metal layer and the probe are arranged to realize energy coupling. Specifically, the probes 624 may be metallized through holes, and the surface metal layer 614 may be a small strip of metal plating layer. The probes may be elongated as shown in FIG. 6 . The probe 624 may not penetrate the dielectric antenna. The probes 624 and the surface metal layer 614 may be connected by pads.

In some embodiments of the present application, the dielectric antenna may be a dual-polarized antenna. In this way, a dual-polarized dielectric filter antenna can be formed. FIG. 7 is a schematic diagram of a dual-polarized dielectric filter antenna 700 according to an embodiment of the present application. A in FIG. 7 is a perspective view of the dual-polarized dielectric filter antenna 700; B in FIG. 7 is a top view of the dual-polarized dielectric filter antenna 700; C in FIG. measurement view. As shown in FIG. 7 , the dual-polarized dielectric filter antenna has two feed ports (connectors), and each feed port corresponds to one channel and one signal. The polarization directions of the two signals may be orthogonal, for example, +45 degrees and -45 degrees. Each signal is filtered by an 8-cavity dielectric resonant cavity, plus a cavity of the dielectric antenna, a total of 9 cavities, that is, 9th order. That is, the dual-polarized dielectric filter antenna shown in FIG. 7 is a dual-polarized ninth-order dielectric filter antenna, and the dual-polarized ninth-order dielectric filter antenna is very common in the antenna system of the base station. The embodiments of the present application also provide dielectric filter antennas of other orders. For example, if an additional 8-cavity dielectric resonator is added, a dual-polarized 17th-order dielectric filter antenna can be formed.

The echo performance of the dielectric filter antenna provided by each embodiment of the present application is greatly improved. FIG. 8 is a comparison diagram of the echo performance of the dielectric filter antenna according to the embodiment of the present application and the existing antenna. FIG. 8 shows the S-parameters of the dielectric filter antenna of the embodiment of the present application and the existing antenna under the condition of the same antenna size. It can be seen from FIG. 8 that taking the S parameter -20dB as an example, the working bandwidth of the dielectric filter antenna of the embodiment of the present application is about 3.50GHz to 3.63GHz; the working bandwidth of the existing antenna is only about 3.54GHz to 3.57GHz. The working bandwidth of the dielectric filter antenna in the embodiment of the present application is obviously widened, so on the one hand, the echo performance is greatly improved, and on the other hand, the working bandwidth is greatly improved, which is conducive to realizing the miniaturization of the antenna system.

For the dielectric filter antenna provided by the embodiments of the present application, the entire structure is formed only by splicing multiple layers of dielectric blocks, and only simple operations such as punching, metal plating, and sintering are required for the dielectric blocks. The dielectric filter antenna has low processing difficulty, low cost and good performance consistency.

The present application also provides an electronic device, which includes the dielectric filter antenna of the embodiments of the present application described above.

The present application also provides an antenna array including a plurality of the dielectric filter antennas of the embodiments of the present application described above. In the antenna array, multiple dielectric filter antennas form an array according to the horizontal and/or vertical directions.

The antenna array of the embodiments of the present application has a small particle size and a large degree of freedom of layout. The dual-polarized dielectric filter antenna unit in this embodiment of the present application may correspond to two channels polarized at ±45 degrees. Multiple dual-polarized dielectric filter antennas can be used to form an antenna array in any horizontal or vertical direction.

The antenna array of the embodiment of the present application may be applied to a network device, for example, a base station.

It should be understood that the various numbers and numbers involved in this document are only for the convenience of description, and are not used to limit the scope of the present application.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A dielectric filter antenna is characterized by comprising a dielectric antenna and at least one layer of dielectric resonant cavity, the dielectric antenna is located on the top layer, the at least one layer of dielectric resonant cavity is located under the dielectric antenna, the dielectric antenna and the Energy coupling is performed between adjacent dielectric resonant cavities of the dielectric antenna, wherein the materials of the dielectric antenna and the dielectric resonant cavity are high dielectric constant ceramic dielectrics.
The dielectric filter antenna according to claim 1, wherein a dielectric provided between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna passes through the dielectric antenna and the dielectric cavity adjacent to the dielectric antenna. Slots, probes, or surface metal layers on the resonator perform energy coupling.
The dielectric filter antenna according to claim 1 or 2, wherein a bottom surface of the dielectric antenna is provided with a first slot inward, and a top surface of a dielectric resonant cavity adjacent to the dielectric antenna is provided with a second slot inward. a slot, the positions of the first slot and the second slot are aligned, and energy coupling is performed between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna through the first slot and the second slot .
The dielectric filter antenna according to claim 1 or 2, wherein a bottom surface of the dielectric antenna is provided with a first probe inward, and a top surface of a dielectric resonant cavity adjacent to the dielectric antenna is provided with a first probe inward. Two probes, the positions of the first probe and the second probe are aligned, and between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna, the first probe is connected to the second probe. Two probes perform energy coupling.
The dielectric filter antenna according to claim 4, wherein the first probe and the second probe are both metallized through holes, and the gap between the first probe and the second probe is connected via pads.
The dielectric filter antenna according to claim 1 or 2, characterized in that, the side surface of the dielectric antenna has a surface metal layer, the top surface of the dielectric resonant cavity adjacent to the dielectric antenna is provided with a probe inward, and the surface is provided with a probe. The positions of the metal layer and the probe are aligned, and energy coupling is performed between the dielectric antenna and the dielectric resonant cavity adjacent to the dielectric antenna through the surface metal layer and the probe.
The dielectric filter antenna according to claim 6, wherein the probe is a metallized through hole, and the probe and the surface metal layer are connected by a pad.
The dielectric filter antenna according to any one of claims 1 to 7, wherein the dielectric antenna is a dual-polarized antenna.
The dielectric filter antenna according to any one of claims 1 to 8, wherein a part of the surface of the dielectric antenna has a metal plating layer.
The dielectric filter antenna according to any one of claims 1 to 9, characterized in that, all surfaces of each dielectric resonant cavity in the at least one layer of dielectric resonant cavity are provided with a metal coating.
An electronic device, characterized by comprising the dielectric filter antenna according to any one of claims 1 to 10.
An antenna array, characterized in that it comprises a plurality of dielectric filter antennas according to any one of claims 1 to 10, wherein the plurality of dielectric filter antennas form an array according to horizontal and/or vertical directions.
The antenna array according to claim 12, wherein the antenna array is applied in network equipment.