CN210468057U - All-dielectric waveguide filter convenient for adjusting coupling amount - Google Patents
All-dielectric waveguide filter convenient for adjusting coupling amount Download PDFInfo
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- CN210468057U CN210468057U CN201922146019.8U CN201922146019U CN210468057U CN 210468057 U CN210468057 U CN 210468057U CN 201922146019 U CN201922146019 U CN 201922146019U CN 210468057 U CN210468057 U CN 210468057U
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Abstract
The utility model discloses an all-dielectric waveguide filter convenient for adjusting coupling amount, which comprises a metal sheet (3) and two symmetrical dielectric blocks relative to the metal sheet (3), wherein one dielectric block is welded above the metal sheet (3), and the other dielectric block is welded below the metal sheet (3); each dielectric block comprises a plurality of dielectric waveguide monomers (5) which are sequentially arranged from left to right, and two adjacent dielectric waveguide monomers (5) are connected through a coupling window (4); at least one metal shielding layer (7) is arranged on the connecting surface of each dielectric waveguide monomer (5) and the metal thin plate (3). The utility model provides a full dielectric waveguide filter convenient to adjust coupling volume, the dielectric filter mass production of being convenient for and the regulation help improving dielectric filter's straight rate.
Description
Technical Field
The utility model relates to a microwave technology field especially relates to a full dielectric waveguide filter convenient to adjust coupling amount.
Background
A filter is a frequency-selective device that passes certain frequency components of a signal while significantly attenuating other frequency components. By using the frequency selection function of the filter, interference noise can be filtered out or spectrum analysis can be carried out.
In the 5G era, the requirement of Massive antenna Massive MIMO on the integration of radio frequency devices is limited, filters need to be more miniaturized and integrated, and under the condition of limiting the size of a cavity, due to the loss of materials of the filters, metal coaxial cavities and dielectric resonator filters used in the 3G and 4G era cannot obtain very high Q values, so that various performance indexes are limited. Therefore, all-dielectric waveguide filters become the mainstream solution to meet the size and performance requirements of 5G base station filters. The electric wave resonance in the all-dielectric waveguide filter occurs in the dielectric material without a metal cavity, so that the volume of the all-dielectric waveguide filter is smaller than that of the two filters. Similar to the advantages of dielectric resonator filters, all-dielectric waveguide filters also have the advantages of high Q value, good frequency-selective characteristics, good stability of operating frequency, low insertion loss, and the like. Therefore, compared with the conventional cavity filter, the dielectric filter has more excellent product performance, smaller size, lower power consumption and lower cost once mass production is realized. Based on the advantages, the all-dielectric waveguide filter is a mainstream choice for the 5G era SUB 6G frequency band.
The conventional mode of adjusting the coupling quantity of the all-dielectric waveguide filter by using a dental drill has no regularity and repeatability, is not beneficial to mass production and debugging, and has low through rate of the filter.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provides a full dielectric waveguide filter convenient to adjust the coupling volume, and the dielectric filter mass production of being convenient for helps improving dielectric filter's direct rate with adjusting.
The purpose of the utility model is realized through the following technical scheme: an all-dielectric waveguide filter convenient for adjusting coupling quantity comprises a metal sheet and two dielectric blocks which are symmetrical about the metal sheet, wherein one dielectric block is welded above the metal sheet, and the other dielectric block is welded below the metal sheet;
each dielectric block comprises a plurality of dielectric waveguide monomers which are sequentially arranged from left to right, and two adjacent dielectric waveguide monomers are connected through a coupling window; at least one metal shielding layer is arranged on the connecting surface of each dielectric waveguide monomer and the metal thin plate.
Preferably, the dielectric block welded above the metal sheet is an upper dielectric block, and the dielectric block welded below the metal sheet is a lower dielectric block; the number of the dielectric waveguide monomers contained in the upper dielectric block is the same as that of the dielectric waveguide monomers contained in the lower dielectric block, and the dielectric waveguide monomers are in one-to-one correspondence; one dielectric waveguide monomer in the upper dielectric block and a dielectric waveguide monomer corresponding to the lower dielectric block form a dielectric waveguide monomer group;
preferably, the width of the coupling window is smaller than the width of the dielectric waveguide monomer; the metal shielding layer is rectangular, square or circular.
Preferably, a plurality of cavity groups penetrating through the metal sheet are arranged on the metal sheet; each cavity group corresponds to a dielectric waveguide monomer group; each cavity group contains at least one cavity.
For each dielectric waveguide monomer group, the number of the metal shielding layers of the dielectric waveguide monomers in the upper dielectric block is the same as that of the cavities in the corresponding cavity group, and the metal shielding layers correspond to the cavities in the corresponding cavity group one by one; and the size of the cavity is smaller than the size of the corresponding metal shielding layer.
For each dielectric waveguide monomer group, the number of the metal shielding layers of the dielectric waveguide monomers in the lower dielectric block is the same as that of the cavities in the corresponding cavity group, and the metal shielding layers correspond to the cavities in the corresponding cavity group one by one; and the size of the cavity is smaller than the size of the corresponding metal shielding layer.
The utility model has the advantages that: the utility model discloses the size decision of cavity on the sheet metal goes up the dielectric block and the coupling volume between the dielectric block down, and the cavity is the regulation structure of wave filter coupling volume promptly, through the size of accurate processing cavity, can realize the coupling volume in the wave filter course of working and adjust, and the medium filter mass production of being convenient for helps improving medium filter's through rate with adjusting.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 is a side view of embodiment 1 of the present invention;
fig. 3 is a schematic view of a connection surface of a dielectric waveguide monomer according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a metal sheet according to embodiment 1 of the present invention;
fig. 5 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 6 is a performance diagram of an all-dielectric waveguide filter according to embodiment 2 of the present invention;
in the figure, 1-upper dielectric block, 2-lower dielectric block, 3-metal sheet, 4-coupling window, 5-dielectric waveguide monomer, 6-connecting surface, 7-metal shielding layer and 8-cavity.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in fig. 1 to 3, in embodiment 1 of the present application, an all-dielectric waveguide filter facilitating adjustment of a coupling amount is characterized in that: the device comprises a metal sheet 3 and two dielectric blocks which are symmetrical about the metal sheet 3, wherein one dielectric block is welded above the metal sheet 3, and the other dielectric block is welded below the metal sheet 3; each dielectric block contains two dielectric waveguide monomers 5.
Each dielectric block comprises a plurality of dielectric waveguide monomers 5 which are sequentially arranged from left to right, and two adjacent dielectric waveguide monomers 5 are connected through a coupling window 4; at least one metal shielding layer 7 is arranged on the connecting surface 6 of each dielectric waveguide monomer 5 and the metal thin plate 3.
In this embodiment, the metal shielding layer 7 is rectangular, square or circular, and may be located at the central axis of the connecting surface 6 to provide capacitive coupling for the dielectric filter; or at the edges of two sides of the symmetrical axis which is the central axis of the connecting surface 6, providing inductive coupling for the dielectric filter; the metal shielding layer 7 is a non-silver region, the surface of the dielectric waveguide monomer 5 at the position where the metal shielding layer 7 is arranged is not silver, the size and the position of the non-silver region are consistent with those of the metal shielding layer 7, and the rest surfaces of the dielectric waveguide monomer 5 except the position of the metal shielding layer 7 are subjected to silver treatment;
in embodiment 1, each dielectric waveguide monomer 5 is an entity made of a dielectric material, the coupling window 4 and the dielectric waveguide monomer 5 are entities made of the same dielectric material, the dielectric constant of the material can be 9.8, 21 or 36 and other common dielectric materials, and the sizes of the entities made of dielectric materials with different dielectric constants are different; the width of the coupling window 4 is smaller than that of the dielectric waveguide monomer 5;
in embodiment 1, the dielectric block welded above the metal thin plate 3 is an upper dielectric block 1, and the dielectric block welded below the metal thin plate 3 is a lower dielectric block 2; the number of the dielectric waveguide monomers 5 contained in the upper dielectric block 1 is the same as that of the dielectric waveguide monomers 5 contained in the lower dielectric block 2, and the dielectric waveguide monomers 5 correspond to each other one by one. One dielectric waveguide monomer 5 in the upper dielectric block 1 and the dielectric waveguide monomer 5 corresponding to the lower dielectric block 2 form a dielectric waveguide monomer group;
as shown in fig. 4, in example 1, a plurality of cavity groups penetrating through the thin metal plate 3 are provided on the thin metal plate 3; each cavity group corresponds to a dielectric waveguide monomer group; each cavity group contains at least one cavity 8.
For each dielectric waveguide monomer group, the number of the metal shielding layers 7 of the dielectric waveguide monomers 5 in the upper dielectric block 1 is the same as that of the cavities 8 in the corresponding cavity group, and the metal shielding layers correspond to the cavities one by one; and the size of the cavity 8 is smaller than the size of the corresponding metallic shield layer 7.
For each dielectric waveguide monomer group, the number of the metal shielding layers 7 of the dielectric waveguide monomers 5 in the lower dielectric block 2 is the same as that of the cavities 8 in the corresponding cavity group, and the metal shielding layers correspond to the cavities one by one; and the size of the cavity 8 is smaller than the size of the corresponding metallic shield layer 7. The center position of a metal shielding layer 7 on a connecting surface 6 of a dielectric waveguide monomer 5 of an upper dielectric block 1 and a lower dielectric block 2 is aligned with the center position of a cavity 8 on a metal sheet 3, and then the dielectric blocks 1 and 2 are welded with the metal sheet 3 to form a coupling cavity among the upper dielectric block 1, the lower dielectric block 2 and the metal sheet 3.
In this embodiment 1, the coupling windows 4 on the upper dielectric block 1 and the lower dielectric block 2 are filter coupling bandwidth adjusting structures, and the coupling amount between the dielectric waveguide monomers 5 can be finely adjusted by changing the width of the coupling window 4 or destroying the partial back silver layer on the outer surface of the coupling window 4; because the size of the cavity 8 is smaller than that of the metal shielding layer 7, the coupling amount between the upper dielectric block 1 and the lower dielectric block 2 is determined by the size of the cavity 8 on the metal sheet 3, namely the cavity 8 is an adjusting structure of inductive coupling or capacitive coupling of the filter, the size of the cavity 8 can be accurately processed by a milling cutter, the batch production and adjustment of the dielectric filter are facilitated, and the through rate of the dielectric filter is improved.
As shown in fig. 5, in example 2 of the present application, each dielectric block contains 4 dielectric waveguide monomers 5, and the rest of the structure is the same as that of example 1; fig. 6 is a performance diagram of the all-dielectric waveguide filter of example 2, and it can be seen from fig. 6 that the all-dielectric waveguide filter has an operating frequency of 3400MHz-3600MHz and has two symmetrical transmission zeros.
Those skilled in the art will appreciate that the examples described herein are intended to assist the reader in understanding the principles of the present invention, and that, based on the above-described structural design, those skilled in the art can make various modifications and combinations without departing from the scope of the invention.
Claims (7)
1. An all-dielectric waveguide filter convenient for adjusting coupling amount is characterized in that: the device comprises a metal thin plate (3) and two dielectric blocks which are symmetrical about the metal thin plate (3), wherein one dielectric block is welded above the metal thin plate (3), and the other dielectric block is welded below the metal thin plate (3);
each dielectric block comprises a plurality of dielectric waveguide monomers (5) which are sequentially arranged from left to right, and two adjacent dielectric waveguide monomers (5) are connected through a coupling window (4); at least one metal shielding layer (7) is arranged on the connecting surface (6) of each dielectric waveguide monomer (5) and the metal thin plate (3).
2. An all-dielectric waveguide filter facilitating the adjustment of the amount of coupling according to claim 1, wherein: the dielectric block welded above the metal sheet (3) is an upper dielectric block (1), and the dielectric block welded below the metal sheet (3) is a lower dielectric block (2); the number of the dielectric waveguide monomers (5) contained in the upper dielectric block (1) is the same as that of the dielectric waveguide monomers (5) contained in the lower dielectric block (2), and the dielectric waveguide monomers (5) in the upper dielectric block (1) and the dielectric waveguide monomers (5) corresponding to the lower dielectric block (2) form a dielectric waveguide monomer group.
3. An all-dielectric waveguide filter facilitating the adjustment of the amount of coupling according to claim 1, wherein: the width of the coupling window (4) is smaller than that of the dielectric waveguide monomer (5).
4. An all-dielectric waveguide filter facilitating the adjustment of the amount of coupling according to claim 1, wherein: the metal shielding layer (7) is rectangular, square or circular.
5. An all-dielectric waveguide filter facilitating the adjustment of the amount of coupling according to claim 2, wherein: the metal thin plate (3) is provided with a plurality of cavity groups penetrating through the metal thin plate (3); each cavity group corresponds to a dielectric waveguide monomer group; each cavity group comprises at least one cavity (8).
6. An all-dielectric waveguide filter facilitating the adjustment of the amount of coupling according to claim 5, wherein: for each dielectric waveguide monomer group, the number of the metal shielding layers (7) of the dielectric waveguide monomers (5) in the upper dielectric block (1) is the same as that of the cavities (8) in the corresponding cavity group, and the metal shielding layers correspond to the cavities one by one; and the size of the cavity (8) is smaller than the size of the corresponding metal shielding layer (7).
7. An all-dielectric waveguide filter facilitating the adjustment of the amount of coupling according to claim 5, wherein: for each dielectric waveguide monomer group, the number of the metal shielding layers (7) of the dielectric waveguide monomers (5) in the lower dielectric block (2) is the same as that of the cavities (8) in the corresponding cavity group, and the metal shielding layers correspond to the cavities one by one; and the size of the cavity (8) is smaller than the size of the corresponding metal shielding layer (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922146019.8U CN210468057U (en) | 2019-12-04 | 2019-12-04 | All-dielectric waveguide filter convenient for adjusting coupling amount |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110867631A (en) * | 2019-12-04 | 2020-03-06 | 成都泰格微波技术股份有限公司 | All-dielectric waveguide filter convenient for adjusting coupling amount |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110867631A (en) * | 2019-12-04 | 2020-03-06 | 成都泰格微波技术股份有限公司 | All-dielectric waveguide filter convenient for adjusting coupling amount |
| CN110867631B (en) * | 2019-12-04 | 2024-08-16 | 成都泰格微波技术股份有限公司 | All-dielectric waveguide filter convenient for adjusting coupling quantity |
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