CN214153142U

CN214153142U - Ceramic dielectric filter

Info

Publication number: CN214153142U
Application number: CN202022775400.3U
Authority: CN
Inventors: 方万里; 李昂昂; 李大旗; 梁德华
Original assignee: Shunluo Shanghai Electronics Co Ltd
Current assignee: Shunluo Shanghai Electronics Co Ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-09-07
Anticipated expiration: 2030-11-26
Also published as: WO2022028630A2; WO2022028630A3

Abstract

The utility model discloses a ceramic dielectric filter, which comprises a main body and a metal layer made of conductive materials, wherein the main body comprises a top surface, a bottom surface, a front surface, a back surface, a left side surface and a right side surface, and an edge formed by two adjacent planes, and the edge is provided with a transition surface; the metal layer covers the outer surface of the main body. The utility model discloses a set up the transition face on each arris of ceramic dielectric filter, increase effective use area, improved product service reliability, and anti falling ageing resistance improves, has prolonged life.

Description

Ceramic dielectric filter

Technical Field

The utility model relates to a wave filter technical field especially relates to a ceramic dielectric wave filter.

Background

With the rapid development of the communication industry, the fifth generation mobile communication network era, i.e. the 5G era, is coming, because the 5G communication needs a higher working frequency band, and the CTE of the ceramic dielectric filter is close to zero, the ceramic dielectric filter has the characteristics of high dielectric constant and low loss, the volume of the traditional cavity filter can be reduced, and the demand on the ceramic dielectric filter is sharply increased. However, the ceramic dielectric filter has low production yield, unstable use process and higher cost, and cannot meet the requirements of times and customers.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is poor in order to solve current ceramic dielectric filter operational reliability under the high frequency band, and the short problem of life provides a ceramic dielectric filter.

The utility model provides a ceramic dielectric filter, ceramic dielectric filter includes the metal level that main part and conducting material constitute, the main part includes top surface, bottom surface, front, back, left surface and right flank, and the edge that two adjacent planes formed, the edge is equipped with the transition face; the metal layer covers the outer surface of the main body.

Preferably, the transition surface is a round angle structure and a step surface, the size of the round angle structure is R0.05mm-R5mm, the length of the step surface is the same as that of the edge where the step surface is located, and the width of the step surface is 0.02mm-5 mm.

Preferably, the transition surface is a chamfer structure and a step surface, the size of the chamfer structure is C0.05mm-C5mm, the length of the step surface is the same as that of the edge where the step surface is located, and the width of the step surface is 0.02mm-5 mm.

Preferably, the transition surface is a fillet structure and a chamfer structure, the size of the fillet structure is R0.05mm-R5mm, and the size of the chamfer structure is C0.05mm-C5 mm.

Preferably, the transition surface is a rounded corner structure, and the size of the rounded corner structure is R0.05mm-R5 mm.

Preferably, the transition surface is a chamfer structure, and the size of the chamfer structure is C0.05mm-C5 mm.

Preferably, when the length of the longer edge of the ceramic dielectric filter is greater than or equal to one time of the length of the shorter edge, the accuracy of the transition surface provided on the longer edge is greater than the accuracy of the transition surface provided on the shorter edge.

The beneficial effects of the utility model include: the transition surfaces are arranged on the edges of the ceramic dielectric filter, so that the effective use area is increased, the use reliability of the product is improved, the anti-falling and anti-aging capabilities are improved, and the service life is prolonged.

Drawings

Fig. 1 is a schematic diagram of a ceramic dielectric filter according to the prior art.

Fig. 2 is a schematic structural diagram of the ceramic dielectric filter according to the present invention, in which the transition surface is a fillet structure and a step surface.

Fig. 3 is a schematic structural diagram of the transition surface of the ceramic dielectric filter of the present invention being a chamfer structure and a step surface.

Fig. 4 is a schematic structural diagram of the ceramic dielectric filter according to the present invention, in which the transition surface is a fillet structure and a chamfer structure.

Fig. 5 is a schematic structural diagram of the ceramic dielectric filter according to the present invention, in which the transition surface is a fillet structure.

Fig. 6 is a schematic structural diagram of the ceramic dielectric filter according to the present invention, in which the transition surface is a chamfer structure.

Fig. 7 is a schematic diagram of the combined structure of the ceramic dielectric filter of fig. 2.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.

Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts, unless otherwise specified.

Example 1:

as shown in fig. 2 to 6, the ceramic dielectric filter according to the present embodiment includes a main body and a metal layer made of a conductive material, the main body includes a top surface, a bottom surface, a front surface, a back surface, a left side surface and a right side surface, and edges formed by two adjacent planes, all the edges are provided with transition surfaces, and the metal layer covers the entire outer surface of the main body. The edge of the ceramic dielectric filter is provided with the transition surface, so that the edge has a streamline structure, the reliability and the stability of the ceramic dielectric filter under severe working conditions of high frequency band, high temperature and the like are improved, and the ceramic dielectric filter is resistant to falling and ageing and good in thermal vibration stability.

Specifically, in the embodiment, the transition surface is a round angle structure and a step surface, the size range of the round angle structure is R0.05mm-R5mm, the length of the step surface is the same as the length of the edge where the step surface is located, and the width range of the step surface is 0.02mm-5 mm. All do the transition face at each edge of main part and handle, can effectively avoid sharper edge under the exogenic action, the problem that the edge emergence point atress appears collapsing and lacks and lead to the electrical cracking effectively improves its stability of using in other adverse circumstances such as high frequency, low frequency and high temperature. After the blank of the main body is sintered, the blank can be processed by a grinding machine single-side or double-side grinding machine, the processed flatness of the main body is less than 0.02mm, the surface roughness Ra is less than 3um, then a transition surface is processed by a high-speed grinding head, and finally the metal layer is printed or sprayed on the surface of the main body. The utility model discloses a ceramic dielectric filter also can assemble and use, as shown in fig. 7, when two or more ceramic dielectric filters assemble, the junction of two transition faces forms a slot, can be used to fill the solder, increases welding reliability, makes ceramic dielectric filter's mechanical reliability reinforcing, the whole yield of increase of service life and product processing equipment.

The size and the precision of the transition surface of the edge of the ceramic dielectric filter are related to the size of the transition surface, if the length of the longer edge of the ceramic dielectric filter is greater than or equal to one time of the length of the shorter edge, the precision of the transition surface arranged on the longer edge is greater than that of the transition surface arranged on the shorter edge, the size of the chamfer or the fillet on the longer edge is greater than that of the chamfer or the fillet on the shorter edge, and the size difference caused by uneven stress during the processing of the longer edge can be reduced.

In order to demonstrate the difference in performance between the ceramic dielectric filter with the transition surface arranged at each edge and the ceramic dielectric filter without the treated edge under the dropping and high and low temperature impact, the inventor carries out a comparative experiment.

(1) The ceramic dielectric filters with the transition surfaces have good anti-drop performance as shown by experiments comparing the structural changes of the ceramic dielectric filters with the two structures by enabling the two ceramic dielectric filters to freely drop at the same height. (2) The two ceramic filters are subjected to high and low temperature impact tests simultaneously, and experiments show that the number of impact resistant wheels of the ceramic dielectric filter with the transition surface is about 1.25 times of that of a product with untreated edges.

Example 2

The difference between the embodiment and the embodiment 1 is that the transition surface of the ceramic dielectric filter is a chamfer structure and a step surface, the size of the chamfer structure is C0.05mm-C5mm, the length of the step surface is the same as the length of the edge where the step surface is located, and the width range of the step surface is 0.02mm-5 mm.

Example 3

The difference between the embodiment and the embodiment 1 is that the transition surface of the ceramic dielectric filter is in a fillet structure and a chamfer structure, the size of the fillet structure is R0.05mm-R5mm, and the size of the chamfer structure is C0.05mm-C5 mm.

Example 4

The difference between the embodiment and the embodiment 1 is that the transition surface of the ceramic dielectric filter is in a round corner structure, and the size of the round corner structure is R0.05mm-R5 mm.

Example 5

The difference between the embodiment and the embodiment 1 is that the transition surface of the ceramic dielectric filter is in a chamfer structure, and the size of the chamfer structure is C0.05mm-C5 mm.

Those skilled in the art will recognize that numerous variations are possible in light of the above description, and therefore the examples and drawings are merely intended to describe one or more specific embodiments.

While there has been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions can be made therein without departing from the spirit of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents falling within the scope of the present invention.

Claims

1. A ceramic dielectric filter is characterized by comprising a main body and a metal layer made of conductive materials, wherein the main body comprises a top surface, a bottom surface, a front surface, a back surface, a left side surface, a right side surface and an edge formed by two adjacent planes, and the edge is provided with a transition surface; the metal layer covers the outer surface of the main body.

2. A ceramic dielectric filter as claimed in claim 1 wherein the transition surfaces are rounded structures and step surfaces, the rounded structures have dimensions R0.05mm-R5mm, the step surfaces have the same length as the edges on which they are located and have a width of 0.02mm-5 mm.

3. A ceramic dielectric filter as claimed in claim 1 wherein the transition surfaces are chamfered and stepped, the chamfered dimension being C0.05mm to C5mm, and the stepped surface having the same length as the edge on which it is located and a width of 0.02mm to 5 mm.

4. A ceramic dielectric filter as claimed in claim 1 wherein the transition surfaces are rounded structures and chamfered structures, the rounded structures having a size R0.05mm-R5mm and the chamfered structures having a size C0.05mm-C5 mm.

5. A ceramic dielectric filter as claimed in claim 1 wherein said transition surface is a fillet configuration having a dimension R0.05mm-R5 mm.

6. A ceramic dielectric filter as claimed in claim 1 wherein said transition surface is a chamfered configuration having a dimension C0.05mm-C5 mm.

7. A ceramic dielectric filter as claimed in claim 1 wherein the accuracy of the transition surface provided on the longer edge is greater than the accuracy of the transition surface provided on the shorter edge when the length of the longer edge of the ceramic dielectric filter is greater than or equal to one time the length of the shorter edge.