CN218731703U

CN218731703U - Dielectric filter

Info

Publication number: CN218731703U
Application number: CN202222004316.0U
Authority: CN
Inventors: 吴飞甲; 张元元; 邵国云; 林迪卿; 吴腾杰
Original assignee: Jiaxing Glead Electronics Co ltd
Current assignee: Jiaxing Glead Electronics Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2023-03-24
Anticipated expiration: 2032-08-01

Abstract

The utility model relates to a dielectric filter, including the dielectric block, be equipped with the metal pattern layer on the open circuit terminal surface of dielectric block, this metal pattern layer includes a plurality of metal blocks and many metal sidelines, input electrode, output electrode respectively with open circuit terminal surface on metal sideline A, metal sideline B electric connection, and metal sideline A, metal sideline B extend to respectively between two corresponding metal blocks; coating metal sidelines C on the left side, the right side and the upper side of the open end face, wherein the metal sidelines C are respectively connected with the left side, the right side and the upper surface; the lower side of the open end face is provided with a metal sideline E between the metal sideline A and the metal sideline B, the metal sideline E is connected with the lower surface, and at least one metal sideline D extending downwards on the metal sideline C is connected to the metal sideline E. The utility model discloses a structure has been simplified to the wave filter, improves the electrical property index to provide low insertion loss, the external two zeros in wave filter both ends improve the attenuation ratio effect outside the near-end outband.

Description

Dielectric filter

Technical Field

The utility model relates to a wave filter technical field, concretely relates to dielectric filter.

Background

In general, a dielectric filter is composed of a dielectric block made of a ceramic material and a plurality of coaxial resonance holes penetrating the dielectric block. The dielectric filter requires a minimum insertion loss in a pass band and a minimum attenuation ratio outside the pass band, and ensures the quality of signal transmission of the communication system. The open side of the dielectric filter is coated with metal patterns, the design of the patterns can be different according to the working frequency spectrum required by the communication system, and if the design of the patterns on the surface of the filter is not reasonable, the characteristics of the filter can be influenced, and the quality of communication signals can be further influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a dielectric filter that terminal surface pattern reasonable in design, performance is good.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a dielectric filter comprises a dielectric block, wherein an open end face, a short circuit face, a lower face, an upper face, a left side face and a right side face are arranged on the dielectric block, the open end face and the short circuit face are arranged oppositely, metal layers are coated on the short circuit face, the lower face, the upper face, the left side face and the right side face, and the lower face is also provided with a signal input electrode and a signal output electrode; a row of through holes are arranged between the open end surface and the short circuit surface of the dielectric block at intervals, a conductive metal layer is coated in each through hole, and the conductive metal layer in each through hole is electrically connected with the metal layer of the short circuit surface; the open circuit end face is provided with a metal pattern layer, the metal pattern layer comprises a plurality of metal blocks and a plurality of metal side lines, each metal block is arranged around the corresponding through hole and is electrically connected with the conductive metal layer in the through hole, the input electrode is electrically connected with the metal side line A on the open circuit end face, the output electrode is electrically connected with the metal side line B on the open circuit end face, and the metal side line A and the metal side line B respectively extend to positions between the two corresponding metal blocks; the left side, the right side and the upper side of the open end surface are coated with metal sidelines C, and the metal sidelines C are respectively connected with the left side, the right side and the upper surface; and a metal sideline E is arranged on the lower side edge of the open end face and between the metal sideline A and the metal sideline B, the metal sideline E is connected with the lower surface, and at least one metal sideline D extending downwards on the metal sideline C is connected to the metal sideline E.

As a preferable scheme: the through holes are eight and respectively include a resonance hole A, a resonance hole B, a resonance hole C, a resonance hole D, a resonance hole E, a resonance hole F, a resonance hole G and a resonance hole H from left to right.

As a preferable scheme: the periphery of resonance hole A is equipped with metal block A, the periphery of resonance hole B is equipped with metal block B, two peripheral metal block interconnect of resonance hole C, resonance hole D form metal block C, the periphery of resonance hole E is equipped with metal block D, the periphery of resonance hole F is equipped with metal block E, the periphery of resonance hole G is equipped with metal block F, the periphery of resonance hole H is equipped with metal block G.

As a preferable scheme: the metal borderline D is located in a gap between the metal block D (118) and the metal block E.

As a preferable scheme: the metal sideline A is positioned in a gap between the metal block A (115) and the metal block B.

As a preferable scheme: the metal borderline B is located in a gap between the metal block F (120) and the metal block G.

As a preferable scheme: and a gap A is reserved between the metal block B and the metal block C to form coupling, a gap B is reserved between the metal block C and the metal block D to form coupling, and a gap C is reserved between the metal block E and the metal block F to form coupling.

As a preferable scheme: the diameter of the through holes is at least one specification.

As a preferable scheme: the upper surface of the mass block is also provided with a metal shielding cover, and the metal shielding cover extends to the open end face of the dielectric block and is separated from the dielectric block by a gap.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a wave filter has optimized the wave filter structural characteristic, and the metallic pattern is external on the open face of wave filter, and coupling capacitance and coupling inductance through adjusting on the metallic pattern reach the wide band width that needs, through two resonance holes of terminal surface pattern electric connection, have simplified the structure, improve the electrical property index to provide low insertion loss, the wave filter both ends are external two zeros, improve the attenuation ratio effect outside the near-end zone.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic diagram of the overall structure of the filter (without the shielding case) according to the present invention;

fig. 2 is a schematic structural view of the filter of the present invention from the bottom;

fig. 3 is a schematic structural diagram of a rear view angle of the filter of the present invention;

fig. 4 is a schematic diagram of the overall structure of the filter (with shielding case) according to the present invention;

fig. 5 is a measurement curve of the filter of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

In order to explain the technical implementation of the present invention in more detail, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 5, a dielectric filter includes a dielectric block 100, the dielectric block 100 is provided with an open end face 101, a short-circuit face 102, a lower face 103, an upper face 104, a left side face 105, and a right side face 106, the open end face 101 is disposed opposite to the short-circuit face 102, the lower face 103, the upper face 104, the left side face 105, and the right side face 106 are all coated with metal layers, and the lower face 103 is further provided with a signal input electrode 103a and a signal output electrode 103b.

A row of through holes are arranged between the open end face 101 and the short circuit face 102 of the dielectric block 100 at intervals, a conductive metal layer 129 is coated inside each through hole, and the conductive metal layer 129 in each through hole is electrically connected with the metal layer of the short circuit face 102; the open end face 101 is provided with a metal pattern layer, the metal pattern layer comprises a plurality of metal blocks and a plurality of metal sidelines, each metal block is arranged around a corresponding through hole, the metal block is electrically connected with the conductive metal layer 129 in the through hole, the input electrode 103a is electrically connected with the metal sideline A127 on the open end face 101, the output electrode 103B is electrically connected with the metal sideline B128 on the open end face 101, and the metal sidelines A127 and the metal sidelines B128 extend to positions between the two corresponding metal blocks.

The left side, the right side and the upper side of the open end face 101 are coated with metal sidelines C131, and the metal sidelines C131 are respectively connected with the left side 105, the right side 106 and the upper surface 104; two short metal sidelines are also arranged at two ends of the lower side edge of the open end face, the two short metal sidelines are respectively connected with two ends of a metal sideline C131, the two short metal sidelines are connected with the lower surface 103, a metal sideline E132 is further arranged between a metal sideline A127 and a metal sideline B128 on the lower side edge of the open end face 101, the metal sideline E132 is connected with the lower surface 103, and at least one metal sideline D125 extending downwards on the metal sideline C131 is connected to the metal sideline E132.

The diameter of the through holes is at least one specification. The number of the through holes is eight, and the through holes are respectively a resonance hole A107, a resonance hole B108, a resonance hole C109, a resonance hole D110, a resonance hole E111, a resonance hole F112, a resonance hole G113 and a resonance hole H114 from left to right. The diameters of the resonance hole B108 and the resonance hole G113 are the same, the diameters of the other six resonance holes are the same, and the diameters of the resonance hole B108 and the resonance hole G113 are larger than the diameters of the other six resonance holes.

The periphery of resonance hole A107 is equipped with metal piece A115, the periphery of resonance hole B108 is equipped with metal piece B116, two metal pieces on the periphery of resonance hole C109, resonance hole D110 interconnect and form metal piece C117, the periphery of resonance hole E111 is equipped with metal piece D118, the periphery of resonance hole F112 is equipped with metal piece E119, the periphery of resonance hole G113 is equipped with metal piece F120, the periphery of resonance hole H114 is equipped with metal piece G121.

The metal borderline D125 is located in the gap between the metal block D118 and the metal block E119. The metal sideline A127 is L-shaped, the metal sideline B128 is arranged in a mirror image mode with the metal sideline A127, the metal sideline A127 extends into a gap between the metal block A115 and the metal block B116, and the metal sideline B128 extends into a gap between the metal block F120 and the metal block G121.

The input electrode 103a connects the signal to the resonance hole B108 while forming an external zero point with the resonance hole a 107. Similarly, the signal output electrode 103b connects the signal to the resonant hole G113 and forms an external zero point with the resonant hole H114.

The metal block B116 and the metal block C117 are coupled with a gap A123 left therebetween, the metal block C117 and the metal block D118 are coupled with a gap B124 left therebetween, and the metal block E119 and the metal block F120 are coupled with a gap C126 left therebetween.

The upper surface 104 of the dielectric block 100 is further provided with a metal shielding case 150, and the metal shielding case 150 extends to the open end face 101 of the dielectric block 100 and leaves a gap with the dielectric block 100.

The utility model discloses a technical scheme main objective improves filter structural characteristic, and on dielectric filter's the terminal surface of opening a way was located to metal pattern, the structural coupling that increases the wave filter on the one hand was in order to reach required service frequency range, and on the other hand passes through outband decay zero point, improves outband decay ratio.

The above description is a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment. Based on the embodiments of the present invention, those skilled in the art should also be able to make other embodiments based on any modifications, equivalent replacements, and improvements of the present invention without creative efforts, and all such embodiments should be included in the protection scope of the claims.

Claims

1. A dielectric filter comprises a dielectric block (100), wherein an open end face (101), a short circuit face (102), a lower face (103), an upper face (104), a left side face (105) and a right side face (106) are arranged on the dielectric block (100), the open end face (101) and the short circuit face (102) are arranged oppositely, metal layers are coated on the short circuit face (102), the lower face (103), the upper face (104), the left side face (105) and the right side face (106), and the lower face (103) is further provided with a signal input electrode (103 a) and a signal output electrode (103 b); a row of through holes are arranged between the open end face (101) and the short circuit face (102) of the dielectric block (100) at intervals, a conductive metal layer (129) is coated inside each through hole, and the conductive metal layer (129) in each through hole is electrically connected with the metal layer of the short circuit face (102); the method is characterized in that: the open circuit end face (101) is provided with a metal pattern layer, the metal pattern layer comprises a plurality of metal blocks and a plurality of metal sidelines, each metal block is arranged around the corresponding through hole and is electrically connected with the conductive metal layer (129) in the through hole, the input electrode (103 a) is electrically connected with the metal sideline A (127) on the open circuit end face (101), the output electrode (103B) is electrically connected with the metal sideline B (128) on the open circuit end face (101), and the metal sideline A (127) and the metal sideline B (128) respectively extend to the space between the corresponding two metal blocks; the left side, the right side and the upper side of the open end face (101) are coated with metal sidelines C (131), and the metal sidelines C (131) are respectively connected with the left side face (105), the right side face (106) and the upper surface (104); and a metal sideline E (132) is further arranged on the lower side of the open end face (101) and between the metal sideline A (127) and the metal sideline B (128), the metal sideline E (132) is connected with the lower surface (103), and at least one metal sideline D (125) extends downwards from the metal sideline C (131) and is connected to the metal sideline E (132).

2. A dielectric filter according to claim 1, wherein: the number of the through holes is eight, and the through holes are respectively a resonance hole A (107), a resonance hole B (108), a resonance hole C (109), a resonance hole D (110), a resonance hole E (111), a resonance hole F (112), a resonance hole G (113) and a resonance hole H (114) from left to right.

3. A dielectric filter according to claim 2, wherein: the periphery of resonance hole A (107) is equipped with metal block A (115), the periphery of resonance hole B (108) is equipped with metal block B (116), two metal block interconnect of the periphery of resonance hole C (109), resonance hole D (110) form metal block C (117), the periphery of resonance hole E (111) is equipped with metal block D (118), the periphery of resonance hole F (112) is equipped with metal block E (119), the periphery of resonance hole G (113) is equipped with metal block F (120), the periphery of resonance hole H (114) is equipped with metal block G (121).

4. A dielectric filter according to claim 3, wherein: the metal borderline D (125) is located in the gap between the metal block D (118) and the metal block E (119).

5. A dielectric filter according to claim 3, wherein: the metal borderline A (127) is located in a gap between the metal block A (115) and the metal block B (116).

6. A dielectric filter according to claim 3, wherein: the metal border line B (128) is located in the gap between the metal block F (120) and the metal block G (121).

7. A dielectric filter according to claim 3, wherein: the metal block B (116) and the metal block C (117) are coupled by a gap A (123) at intervals, the metal block C (117) and the metal block D (118) are coupled by a gap B (124) at intervals, and the metal block E (119) and the metal block F (120) are coupled by a gap C (126) at intervals.

8. A dielectric filter according to claim 1, characterized in that: the diameter of the through holes is at least one specification.

9. A dielectric filter according to claim 1, characterized in that: the upper surface (104) of the dielectric block (100) is further provided with a metal shielding cover (150), and the metal shielding cover (150) extends to the open-circuit end face (101) of the dielectric block (100) and is spaced from the dielectric block (100).