CN209374639U - Filter and its low pass piece - Google Patents
Filter and its low pass piece Download PDFInfo
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- CN209374639U CN209374639U CN201822119697.0U CN201822119697U CN209374639U CN 209374639 U CN209374639 U CN 209374639U CN 201822119697 U CN201822119697 U CN 201822119697U CN 209374639 U CN209374639 U CN 209374639U
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- pass piece
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Abstract
This application discloses a kind of filter and its low pass piece, which includes: multiple filtering part being vacantly arranged, multiple filtering part interval settings；Conducting portion is filtered, filtering conducting portion forms micro strip line type structure, be filtered to the signal for being more than preset critical for connecting spaced multiple filtering part, multiple filtering part and filtering conducting portion；Wherein, multiple filtering part are provided with the fixing seat and mounting hole of insulation, to consolidate low pass piece by fixing seat and mounting hole.For the filter and its low pass piece of the application compared with traditional coupling coaxial cavity filter, the low pass chip architecture of micro strip line type is simpler, is suitable for large batch of production, and only need to simply debug after installing can be used, and processing cost and time cost is greatly reduced.In addition, the low pass piece of banded structure is small in size smaller, and has good insertion loss and intermodulation characteristic, filter wave stability is improved.
Description
Technical field
The application and radio-frequency filter technical field more particularly to a kind of low pass piece, and use the filtering of the low pass piece
Device.
Background technique
It is coupling coaxial cavity filter currently used for the most common filter of transceiver communication system.The general reality of low band filter
Existing mode is bandpass filter.Common bandpass filter is as shown in Figure 1, Fig. 1 is coaxial cavity form filter in the prior art
Structural schematic diagram realizes perception or capacitive coupling by increasing window, coupling muscle or winged bar between resonator, passes through control
The length of the size of window, the width height for coupling muscle and winged bar controls the power of coupling to realize performance of filter.
Multiple frequency broad band combiner in-band insertion loss is small, and each frequency range certainly will be required to have high quality factor.But it is real
Now same quality factor, low frequency single-chamber are bigger than the volume of high frequency single-chamber.But under the requirement of volume miniaturization, to reality
Existing identical radio-frequency performance, the Low-frequency Coaxial chamber of large volume is obviously infeasible, so how to accomplish under the premise of retention property
It is small in size just at urgent problem to be solved.
Utility model content
The technical issues of the application solves is to provide a kind of filter and its low pass piece, passes through the low pass piece generation of micro strip line type
For coupling coaxial cavity filter, processing cost is greatly reduced.
To solve the above problems, the application provides a kind of low pass piece, which includes: multiple filtering being vacantly arranged
Portion, multiple filtering part interval settings；Conducting portion is filtered, filtering conducting portion is multiple for connecting spaced multiple filtering part
Filtering part and filtering conducting portion form micro strip line type structure, are filtered to the signal for being more than preset critical；Wherein, multiple filters
Wave portion is provided with the fixing seat and mounting hole of insulation, to consolidate low pass piece by fixing seat and mounting hole.
To solve the above problems, the application also provides a kind of filter, which includes: low pass piece, and low pass piece includes
Multiple filtering part being vacantly arranged, multiple filtering part interval settings；Conducting portion is filtered, filtering conducting portion is for connecting interval setting
Multiple filtering part, multiple filtering part and filtering conducting portion form micro strip line type structure, to be more than preset critical signal into
Row filtering；Wherein, multiple filtering part are provided with the mounting hole of isolation material, to consolidate low pass by fixing seat and mounting hole
Piece；Fixing piece, fixing piece prevent low pass piece from shaking for fixing low pass piece；Metal shell, low pass piece pass through fixing piece and fixation
Seat is fixed in metal shell.
The beneficial effect of the application is: being different from the prior art, the application is replaced coaxial by the low pass piece of micro strip line type
Cavity filter, compared with traditional coupling coaxial cavity filter, the low pass chip architecture of micro strip line type is simpler, is suitable for large batch of
Production, only need to simply debug after installing can be used, and processing cost and time cost is greatly reduced.In addition, banded structure
Low pass piece is small in size smaller, and has good insertion loss and intermodulation characteristic, improves filter wave stability.
[Detailed description of the invention]
Fig. 1 is the structural schematic diagram of coaxial cavity form filter in the prior art；
Fig. 2 is the structural schematic diagram of one embodiment of low pass piece of the application；
Fig. 3 is the partial structural diagram of an embodiment in the filtering part of Fig. 2 low pass piece；
Fig. 4 is the structural schematic diagram of one embodiment of the application filter.
[specific embodiment]
It is clear in order to be more clear the purpose, technical solution and advantageous effects of the application, below in conjunction with this Shen
Please attached drawing in embodiment, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described
Embodiment is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field
Those of ordinary skill's every other embodiment obtained without making creative work belongs to the application protection
Range.
In the present embodiment, low pass behavior is realized by the high low impedance characteristic of suspended mictrostrip type, is realized in low-frequency range
To the substitution of low-pass filter, the signal for being higher than cutoff frequency is filtered, the signal lower than cutoff frequency is only allowed to pass through.
Referring to Fig. 2, Fig. 2 is the structural schematic diagram of one embodiment of low pass piece of the application.As shown, the low pass piece in the present embodiment
In micro strip line type structure, and low pass piece is earth-free, the low pass piece include multiple filtering part 1 being vacantly arranged and filtering conducting portion 2,
The setting of the plurality of interval of filtering part 1, filtering conducting portion 2 face for connecting spaced multiple filtering part 1 more than default
The signal of dividing value is filtered, wherein preset critical value is in the range of being maintained at 500-1500MHZ.In addition, each filtering
Portion 1 is provided with the fixing seat 10 and mounting hole 11 of insulation, consolidates low pass piece by fixing seat 10 and mounting hole 11.In other realities
Applying in example can also realize multiple filtering part 1 admittedly by a fixing seat 10 and mounting hole 11 according to the quantity of filtering part 1
It is fixed, or the fixation by multiple fixing seats 10 and the realization of mounting hole 11 to single filtering part 1.
In the present embodiment, as shown in figure 3, Fig. 3 is the partial structurtes signal of an embodiment in the filtering part of Fig. 2 low pass piece
Figure.Gasket 100 can be used in fixing seat 10, for preventing the loosening of filtering part 1, while being also used to prevent the abrasion of filtering part 1.Peace
Fixing piece 110 is installed, fixing piece 110 penetrates through mounting hole 11 to fix filtering part 1, and gasket 100 passes through fixing piece on dress hole 11
110 are fixed on the side of filtering part 1, and wherein the position of gasket 100 and mounting hole 11 can be adjusted according to demand.It is low to avoid
Logical piece and external contact influence filtration efficiency, and gasket 100 uses hard insulation, such as ceramic gasket, vulcanie gasket, glass
Glass gasket or resin gasket etc., fixing piece 110 use insulated screw, insulated screw can be selected pan head screw, fillister head screw,
Machine screw with oval countersunk fillister head and sunk screw are therein any, it is not limited here.
In the present embodiment, filtering part 1 can be divided into entrance filtering part 12, median filter portion 13 and outlet filtering part 14, entrance
Filtering part 12, median filter portion 13 and outlet filtering part 14 are connected by filtering conducting portion 2.
Wherein entrance filtering part 12 first receives external telecommunications and is filtered, and median filter portion 13 is connect by filtering conducting portion 2
The signal that income mouth filtering part 12 is transmitted is filtered, and outlet filtering part 14 receives median filter portion 13 by filtering conducting portion 2
The signal of transmission is filtered.External electric signal inputs to entrance filtering part 12 by signal input part 15, and signal input part 15 is logical
Filtering wave conducting portion 2 is connect with entrance filtering part 12, and entrance filtering part 12 and 13 connecting pin of median filter portion are in bending, and are entered
At middle part, signal output end 16 is received through the outlet filtered signal of filtering part 14 for the setting of mounting hole 11 of mouth filtering part 12,
Signal output end 16 is connect by filtering conducting portion 2 with outlet filtering part 14.Wherein filter conducting portion 2 size according to its two
The filtering part 1 of end connection adjusts, and guarantees the transmission signal that filtering conducting portion 2 can be intact.
In order to guarantee filtration efficiency, entrance filtering part 62, median filter portion 63 and outlet 64 specification of filtering part are adjustable, and
And median filter portion 13 may also comprise at least two filtering part 1, before comparing according to signal transmission direction the latter median filter portion 13
One 13 specification of median filter portion is big.Certainly in other embodiments, number that can also according to the actual needs to each filtering part 1
It is selected with size.Preferably, size selection can be obtained by low pass piece circuit simulation 3D modeling, and the present embodiment passes through electricity
Road simulation software carries out circuit simulation, is adjusted by size of the simulation result to the number of filtering part 1, first by low pass piece
Rudimentary model is imported into circuit, then is tested by preset a variety of conditions rudimentary model, while according to test result
The rudimentary model built up is optimized, finally according to entrance filtering part 12, median filter in the modelling low pass piece of optimization
The number and size in portion 13 and outlet filtering part 14.By the above-mentioned means, obtained low pass piece its pass band insertion loss can be lower than
0.1dB, return loss can be lower than 16dB.
It is different from the prior art, the low pass piece of the present embodiment uses micro strip line type structure and traditional coupling coaxial cavity filter phase
Than the low pass chip architecture of micro strip line type is simpler, is suitable for large batch of production, only need to simply debug and can make after installing
With processing cost and time cost is greatly reduced.In addition, the low pass piece of banded structure is small in size smaller, and there is good insert
Enter loss and intermodulation characteristic, improves filter wave stability.
Referring to Fig. 4, Fig. 4 is the structural schematic diagram of one embodiment of the application filter.Filter packet in the present embodiment
Low pass piece, metal shell 8 and fixing piece 610 are included, low pass piece 5 is in micro strip line type structure, and low pass piece is earth-free, the low pass piece packet
Multiple filtering part 6 being vacantly arranged and filtering conducting portion 7, the setting of the plurality of interval of filtering part 6 are included, filtering conducting portion 7 is used for
Spaced multiple filtering part 6 are connected, the signal for being more than preset critical are filtered, wherein preset critical value is being protected
It holds in the range of 500-1500MHZ.In addition, each filtering part 6 is provided with the fixing seat 60 and mounting hole 61 of insulation, installation
Fixing piece 610 is installed, fixing piece 610 penetrates through mounting hole 61 to fix filtering part 6, and gasket is solid by fixing piece 610 on hole 61
Due to the side of filtering part 6.Wherein the position of fixing seat 60 and mounting hole 61 can be adjusted according to demand.Low pass piece 5 passes through
Fixing piece 610 and fixing seat 61 are fixed in metal shell 8, consolidate low pass piece 5 by fixing seat 60 and mounting hole 61.At other
Multiple filtering part 6 can also be realized by a fixing seat 60 and mounting hole 61 according to the quantity of filtering part 6 in embodiment
It is fixed, or the fixation by multiple fixing seats 60 and the realization of mounting hole 61 to single filtering part 6.
In the present embodiment, gasket is can be used in fixing seat 60, for preventing the loosening of filtering part 6, while being also used to prevent from filtering
The abrasion in wave portion 6.Specific structure can refer to above-mentioned Fig. 2-3 related text description, and details are not described herein.For avoid low pass piece 5 with
External contact influence filtration efficiency, gasket use hard insulation, as ceramic gasket, vulcanie gasket, glass gasket or
Resin gasket etc., fixing piece 610 use insulated screw, and pan head screw, fillister head screw, machine screw with oval countersunk fillister head can be selected in insulated screw
It is therein any with sunk screw, it is not limited here.
In the present embodiment, filtering part 6 can be divided into entrance filtering part 62, median filter portion 63 and outlet filtering part 64, entrance
Filtering part 62, median filter portion 63 and outlet filtering part 64 are connected by filtering conducting portion 7.
Wherein entrance filtering part 62 first receives external telecommunications and is filtered, and median filter portion 63 is connect by filtering conducting portion 7
The signal that income mouth filtering part 62 is transmitted is filtered；It exports filtering part 64 and median filter portion 63 is received by filtering conducting portion 7
The signal of transmission is filtered.External electric signal inputs to entrance filtering part 62 by signal input part 65, and signal input part 65 is logical
Filtering wave conducting portion 7 connect 62 connections with entrance filtering part, after signal output end connects 66 receptions by the outlet filtering of filtering part 64
Signal, entrance filtering part 62 and 63 connecting pin of median filter portion are in bending, and the mounting hole 61 of entrance filtering part 62 is arranged
At middle part, signal output end connects 66 receipts and passes through the outlet filtered signal of filtering part 64.Wherein filter conducting portion 7 size according to
The filtering part 6 of its both ends connection adjusts, and guarantees the transmission signal that filtering conducting portion 7 can be intact.
In order to guarantee filtration efficiency, entrance filtering part 62, median filter portion 63 and outlet 64 specification of filtering part are adjustable,
And median filter portion 63 may also comprise at least two filtering part 6, compare according to signal transmission direction the latter median filter portion 63
Previous 63 specification of median filter portion is big.It certainly in other embodiments, can also be according to the actual needs to of each filtering part 6
Number is selected with size.Detailed process please refers to above-described embodiment, and details are not described herein.
It is different from the prior art, the filter of the present embodiment, coupling coaxial cavity filter is replaced by the low pass piece of micro strip line type,
Compared with traditional coupling coaxial cavity filter, the low pass chip architecture of micro strip line type is simpler, is suitable for large batch of production, installation
Only need to simply debug after good can be used, and processing cost and time cost is greatly reduced.In addition, the low pass piece volume of banded structure
It is small, and there is good insertion loss and intermodulation characteristic, improve filter wave stability.
The application is not restricted to described in description and embodiments, therefore can for the personnel of familiar field
Easily realize other advantage and modification, therefore in the spirit without departing substantially from universal defined by claim and equivalency range
In the case where range, the application is not limited to specific details, representative equipment and shown and described herein shows
Example.
Claims (10)
1. a kind of low pass piece, which is characterized in that the low pass piece includes:
Multiple filtering part being vacantly arranged, the multiple filtering part interval setting；
Conducting portion is filtered, the filtering conducting portion is for connecting spaced the multiple filtering part, the multiple filtering part
Micro strip line type structure is formed with filtering conducting portion, the signal for being more than preset critical is filtered；
Wherein, the multiple filtering part is provided with the fixing seat and mounting hole of isolation material, to pass through the fixing seat and peace
Dress hole consolidates the low pass piece.
2. low pass piece according to claim 1, which is characterized in that be equipped with fixing piece, the fixation on the mounting hole
Part penetrates through the mounting hole with the fixation filtering part.
3. low pass piece according to claim 2, which is characterized in that the fixing seat is gasket, and the gasket passes through described
Fixing piece is fixed on the filtering part side, for preventing the loosening of the filtering part.
4. low pass piece according to claim 3, which is characterized in that the material of the gasket is hard insulation.
5. low pass piece according to claim 4, which is characterized in that the fixing piece is insulated screw, the insulated screw
It is therein any including pan head screw, fillister head screw, machine screw with oval countersunk fillister head and sunk screw.
6. low pass piece according to claim 1, which is characterized in that the filtering part further include:
Entrance filtering part, the entrance filtering part first receive external telecommunications and are filtered；
Median filter portion, the median filter portion by the filtering conducting portion receive signal that the entrance filtering part is transmitted into
Row filtering；
Export filtering part；The outlet filtering part by the filtering conducting portion receive signal that the median filter portion is transmitted into
Row filtering.
7. low pass piece according to claim 6, which is characterized in that the median filter portion includes at least two filtering
Portion；And it is bigger than previous median filter portion specification according to median filter portion described in signal transmission direction the latter.
8. low pass piece according to claim 6, which is characterized in that the low pass piece further include:
Signal input part, the signal input part are connect by the filtering conducting portion with the entrance filtering part；
Signal output end, the signal output end are connect by the filtering conducting portion with the outlet filtering part.
9. low pass piece according to claim 1, which is characterized in that the low pass piece is earth-free.
10. a kind of filter, which is characterized in that the filter includes:
Any low pass piece of claim 1-9；
Fixing piece, the fixing piece prevent the low pass piece from shaking for fixing the low pass piece；
Metal shell, the low pass piece are fixed in the metal shell by the fixing piece and fixing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822119697.0U CN209374639U (en) | 2018-12-17 | 2018-12-17 | Filter and its low pass piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822119697.0U CN209374639U (en) | 2018-12-17 | 2018-12-17 | Filter and its low pass piece |
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| Publication Number | Publication Date |
|---|---|
| CN209374639U true CN209374639U (en) | 2019-09-10 |
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| CN201822119697.0U Active CN209374639U (en) | 2018-12-17 | 2018-12-17 | Filter and its low pass piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113992176A (en) * | 2020-07-09 | 2022-01-28 | 大富科技(安徽)股份有限公司 | Filter and communication device |
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- 2018-12-17 CN CN201822119697.0U patent/CN209374639U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113992176A (en) * | 2020-07-09 | 2022-01-28 | 大富科技(安徽)股份有限公司 | Filter and communication device |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co., Ltd Address before: 518104, Guangdong, Shenzhen province Baoan District manhole street, oyster Road, manhole Industrial Company Third Industrial Zone, A1, A2, A3 101, A4 first, second, third layers Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |
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