阅读说明：本技术 一种介质谐振器、介质滤波器、收发信机及基站 (Dielectric resonator, dielectric filter, transceiver and base station ) 是由 童恩东 王细冬 于 2020-02-19 设计创作，主要内容包括：本发明涉及介质滤波器技术领域,目的是提供一种介质谐振器、介质滤波器、收发信机及基站,本发明包括介质单腔,所述介质单腔包含有相对的第一表面和第二表面,所述第一表面上设置有第一盲孔,所述第一盲孔底部未设置金属层,本发明具有容性耦合带宽窄、生产调试简易和无短路风险等优点适合大批量生产。(The invention relates to the technical field of dielectric filters, and aims to provide a dielectric resonator, a dielectric filter, a transceiver and a base station.)

1. A dielectric resonator is characterized by comprising a dielectric single cavity, wherein the dielectric single cavity comprises a first surface and a second surface which are opposite, a first blind hole is formed in the first surface, and a metal layer is not arranged at the bottom of the first blind hole.

2. A dielectric resonator as claimed in claim 1, wherein the surface of the dielectric single cavity and the sidewalls of the first blind via are covered with a metal layer.

3. A dielectric resonator as claimed in claim 1, wherein the aperture edge of the first blind hole is rounded.

4. A dielectric filter comprising at least two dielectric resonators according to any one of claims 1 to 3, wherein adjacent dielectric resonators are fixedly connected by a connection surface, a second blind via is disposed at the connection surface, and no metal layer is disposed at the bottom of the second blind via.

5. A dielectric filter as claimed in claim 4, characterized in that the second blind hole is hole-shaped or slot-shaped.

6. A method of adjusting a resonance frequency of a dielectric resonator as set forth in any one of claims 1 to 3, wherein the resonance frequency is adjusted by removing a dielectric at the bottom of the first blind via.

7. The method according to claim 6, wherein an area or a depth of removing the medium at the bottom of the first blind hole is related to an adjustment amount of the frequency.

8. A method of tuning the capacitive coupling of a dielectric filter as recited in claim 5, wherein the capacitive coupling is tuned by removing the dielectric at the bottom of said second blind via.

9. The method of claim 8, wherein an area or depth of removing the dielectric at the bottom of the second blind via is related to an amount of coupling of the capacitor.

10. A transceiver comprising the dielectric filter of claim 4.

11. A base station comprising the transceiver of claim 10.

Technical Field

The invention relates to the field of dielectric filters, in particular to a dielectric resonator, a dielectric filter, a transceiver and a base station.

Background

A filter is a frequency-selective device that passes certain frequency components of a signal while significantly attenuating other frequency components. The waveguide filter is one of filters used in a communication system, while the traditional waveguide filter is of a metal cavity structure, air is arranged in the middle of the traditional waveguide filter, and the edges of metal materials play roles of electromagnetic shielding and structural support. The filter adopting the mode has a higher Q value, but has larger volume and weight, and is not beneficial to installation and transportation. With the development of communication systems, filters are required to have the characteristics of low insertion loss, high rejection, large power, low cost, miniaturization and the like. Therefore, the high dielectric constant dielectric material is used for replacing the air part to play the roles of conducting electromagnetic waves and supporting the structure, and meanwhile, the silver plating is carried out on the surface of the dielectric block to play the role of electromagnetic shielding, so that the size and the cost of the filter can be obviously reduced.

In order to obtain good loss and suppression, the conventional dielectric waveguide filter usually achieves better performance and smaller size by adding cross coupling, so that a capacitive coupling structure needs to be introduced. Conventional dielectric waveguide filters generally take the following two forms for the purpose of achieving capacitive coupling: the method comprises the steps that firstly, a deep hole mode is adopted, the capacitive coupling bandwidth is controlled by adjusting the distance between the inner wall of the hole depth and the surface of a dielectric waveguide filter, and the smaller the distance is, the narrower the capacitive coupling bandwidth is, so that the distance is quite small for realizing adjustment of the narrow capacitive coupling bandwidth, the problem of easy penetration in the production process is solved, and the difficulty in production debugging is increased; and secondly, a through hole is adopted, a closed circular ring concentric with the through hole is arranged in the circumferential direction of the through hole, and the narrower the width is, the narrower the capacitive coupling bandwidth is, by adjusting the width of the circular ring, so that the narrow capacitive coupling bandwidth is realized, the distance between the outer diameter and the inner diameter of the circular ring is quite small, the error in the production debugging process is uncontrollable, and the short circuit risk is increased. Therefore, the capacitive coupling structure of the traditional dielectric waveguide filter has high production and debugging difficulty and is not beneficial to mass production.

Therefore, there is a need for a dielectric filter having advantages of small size and weight.

Disclosure of Invention

The invention aims to provide a dielectric resonator, a dielectric filter, a transceiver and a base station, wherein blind holes are dug in the dielectric filter, so that the weight of part of media is reduced, and the coupling of the dielectric filter is ensured;

in order to achieve the purpose, the technical scheme adopted by the invention is as follows: one aspect is a dielectric resonator, which includes a dielectric single cavity, where the dielectric single cavity includes a first surface and a second surface opposite to the first surface, the first surface is provided with a first blind via, and a metal layer is not disposed at the bottom of the first blind via.

Preferably, the surface of the medium single cavity and the side wall of the first blind hole are covered with metal layers.

Preferably, the edge of the hole of the first blind hole is provided with a rounded corner.

On the other hand, the dielectric filter at least comprises the two dielectric resonators based on the dielectric resonators, the adjacent dielectric resonators are fixedly connected through a connecting surface, a second blind hole is formed in the connecting surface, and a metal layer is not arranged at the bottom of the second blind hole.

Preferably, the second blind hole is hole-shaped or groove-shaped.

On the other hand, the resonant frequency adjusting method of the dielectric resonator adjusts the resonant frequency in a mode of removing the dielectric at the bottom of the first blind hole.

Preferably, the area or depth of the medium at the bottom of the first blind hole is removed is related to the adjustment amount of the frequency.

On the other hand, the capacitive coupling adjusting method of the dielectric filter adjusts the capacitive coupling in a mode of removing the dielectric at the bottom of the second blind hole.

Preferably, the area or depth of the removed dielectric at the bottom of the second blind via is related to the coupling amount of the capacitor.

In another aspect, a transceiver comprises a dielectric filter as described above.

In another aspect, a base station comprises a transceiver as described above.

Compared with the prior art, the invention has the beneficial effects that:

1. the surface is provided with the metal layer, so that the coupling energy of the dielectric filter is improved;

2. through set up the blind hole on the medium body, when reducing the volume of medium monomer, improved the performance of high coupling low loss of dielectric waveguide filter.

Drawings

Fig. 1 is a structural view of a dielectric filter of the present invention;

FIG. 2 is a block diagram of a blind via in an embodiment of the present invention;

fig. 3 is a structural view of a second surface in an embodiment of the present invention.

1, medium single cavity; 2. a first blind hole; 21. a second blind hole; 3. a first surface; 4. a second surface.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to fig. 1 to 3 of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other implementations made by those of ordinary skill in the art based on the embodiments of the present invention are obtained without inventive efforts.

In the description of the present invention, it is to be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description only, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting.

FIG. 1 is a structural view of a dielectric waveguide filter according to the present invention;

referring to fig. 2, the dielectric single cavity 1 includes a first surface 3 and a second surface 4 opposite to each other, the first surface is provided with a first blind via 2, and a metal layer is not disposed at the bottom of the first blind via.

It is worth to be noted that, regarding the method for adjusting the resonant frequency of the dielectric resonator, the resonant frequency is adjusted by removing the bottom dielectric of the first blind via, and the area or depth of removing the bottom dielectric of the first blind via is related to the adjustment amount of the frequency.

It is worth mentioning that, in the method for adjusting capacitive coupling of a dielectric filter, capacitive coupling is adjusted by removing the dielectric at the bottom of the second blind via, and the area or depth of removing the dielectric at the bottom of the second blind via is related to the coupling amount of the capacitor.

It should be noted that the dielectric waveguide filter is formed by coupling a plurality of dielectric resonators, and the main loss of the metal cavity resonator is the loss of the conductor, in this embodiment, a microwave ceramic material is selected to replace a metal conductor, and an electromagnetic field can be limited in a resonant cavity, so that a higher Q value is maintained, and the volume of the conventional filter is further reduced, but the volume of the dielectric waveguide filter is still maintained in a larger range, and the capacitive coupling structure of the conventional waveguide filter is difficult to produce and debug, and by arranging a first blind hole on a single dielectric cavity, please refer to fig. 2, the edge of the first blind hole is provided with a rounded corner, and the depth of the blind hole is smaller than the height of the single dielectric cavity.

It should be noted that, referring to fig. 3, the metal layer (not shown) may be a silver layer, a copper layer, a gold layer, or the like, and the metal layer may be disposed by a process such as electroplating, sputtering, or the like.

It is worth mentioning that the edge of the hole of the blind hole is provided with a rounding, and the rounding is arranged.

It should be noted that, in this embodiment, a transceiver is also provided, which includes the above-mentioned dielectric filter, and a base station includes the above-mentioned transceiver or the above-mentioned dielectric filter.

In summary, the implementation principle of the invention is as follows: through set up first blind hole and second blind hole on dielectric waveguide filter, through the metal level that single chamber surface of medium and blind hole lateral wall all covered, ceramic material is chooseed for use to the medium, reduces the loss of filter, through removing the medium of first blind hole and second blind hole bottom, and then has reduced the volume and the weight of the filter of this embodiment.