CN206774649U - A kind of new lowpass structures for cavity body filter - Google Patents
A kind of new lowpass structures for cavity body filter Download PDFInfo
- Publication number
- CN206774649U CN206774649U CN201720479604.8U CN201720479604U CN206774649U CN 206774649 U CN206774649 U CN 206774649U CN 201720479604 U CN201720479604 U CN 201720479604U CN 206774649 U CN206774649 U CN 206774649U
- Authority
- CN
- China
- Prior art keywords
- transmission line
- low
- chopped
- resistance
- final stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
It the utility model is related to a kind of new lowpass structures for cavity body filter, the multistage high resistant transmission line alternately connected successively and multistage low-resistance transmission line including two impedance matching portions positioned at both ends and between two impedance matching portions, in multistage high resistant transmission line, chopped-off head high resistant transmission line, final stage high resistant transmission line connects with the impedance matching portion of corresponding one end respectively, also include set respectively and be set to chopped-off head high resistant transmission line, the chopped-off head low-resistance transmission line and final stage low-resistance transmission line of final stage high resistant transmission line, chopped-off head low-resistance transmission line, final stage low-resistance transmission line connects with the impedance matching portion of corresponding one end and is respectively equipped with annular through groove so that set is set to chopped-off head high resistant transmission line respectively, final stage high resistant transmission line；Chopped-off head low-resistance transmission line does not contact with chopped-off head high resistant transmission line, and final stage low-resistance transmission line does not contact with final stage high resistant transmission line.The utility model is remarkably improved the frequency inhibition outside waveform free transmission range, reduces the series of low pass.
Description
【Technical field】
Technology for radio frequency field is the utility model is related to, is related particularly to a kind of for the new low of cavity body filter
Logical structure.
【Background technology】
With the continuous progressive and development of the communication technology, Primary Component of the wave filter as microwave radio field, people couple
While its performance indications requires more and more stricter, more and more harsh requirement is also it is also proposed to its outward appearance, it is desirable to its weight
Increasingly lighter, volume is increasingly come small.So how wave filter lightweight, miniaturization to be become all designers and need to think
The new problem examined.
In wave filter industry, traditional lowpass structures form is：As shown in figure 1, biography of the both ends for 50 ohmages of matching
Defeated line, centre are high resistant and low resistance portions, wherein high resistant line part using the thinner copper cash of diameter, with air and polyethylene as
Medium；And low-resistance line part uses the copper cash being relatively large in diameter, with polyethylene as medium, low pass is in integrally after design is completed
" calabash bunch " type structure.This lowpass structures are simple, and design method is also more ripe, but designs the series of low pass after completion
It is more, cause the overall dimensions of low pass bigger than normal；And to suppress index preferable for this low pass distal end, but close to filter passband model
The suppression index enclosed is poor.
Therefore, need badly and traditional lowpass structures are improved, obtain that a kind of structure is compacter, the suppression outside passband is bent
Line more precipitous low pass solves the defects of above-mentioned conventional filter low pass.
【Utility model content】
The purpose of this utility model is to overcome the shortcomings of above-mentioned technology, there is provided a kind of for the new low of cavity body filter
Logical structure.
A kind of new lowpass structures for cavity body filter provided by the utility model, including two resistances positioned at both ends
Anti- compatible portion and between two impedance matching portions successively alternately connection multistage high resistant transmission line and multistage it is low
Transmission line is hindered, in the multistage high resistant transmission line, chopped-off head high resistant transmission line, final stage high resistant the transmission line institute with corresponding one end respectively
Impedance matching portion connection is stated, includes covering that to be set to the chopped-off head high resistant transmission line, the chopped-off head of final stage high resistant transmission line low respectively
Hinder transmission line and final stage low-resistance transmission line, the chopped-off head low-resistance transmission line, final stage the low-resistance transmission line institute with corresponding one end respectively
State impedance matching portion connection and be respectively equipped with annular through groove so that set is set to chopped-off head high resistant transmission line, final stage high resistant transmission line；
The chopped-off head low-resistance transmission line does not contact with the chopped-off head high resistant transmission line, the final stage low-resistance transmission line and the final stage high resistant
Transmission line does not contact.
Further, the impedance matching portion includes impedance matching transmission line and formed in impedance matching transmission line one
The L-type fine rule at end, the chopped-off head high resistant transmission line, final stage high resistant transmission line, chopped-off head low-resistance transmission line, final stage low-resistance transmission line point
Do not connected with the L-type fine rule of corresponding one end.
Further, the L-type fine rule includes vertical portion and formation in the horizontal part on vertical portion top, the vertical portion
Formed in one end of the impedance matching transmission line, the chopped-off head high resistant transmission line, final stage high resistant transmission line are respectively with corresponding one
The vertical portion connection at end, the chopped-off head low-resistance transmission line, final stage the low-resistance transmission line level with corresponding one end respectively
Portion connects.
Further, the top surface of the chopped-off head low-resistance transmission line, final stage low-resistance transmission line top surface respectively with corresponding one end
The horizontal part either flush.
Further, the center of the annular through groove of the chopped-off head low-resistance transmission line with the vertical portion of corresponding one end
The heart is located on same horizontal line and the diameter of annular through groove and the height of vertical portion are equal, the ring of the final stage low-resistance transmission line
The center of shape groove be centrally located at the vertical portion of corresponding one end on same horizontal line and the diameter of annular through groove with
The height of vertical portion is equal.
Further, the thickness of the L-type fine rule is not less than 1.5 millimeters and outer no more than the impedance matching transmission line
Footpath.
Further, the annular through groove of the chopped-off head low-resistance transmission line is centrally located at the axle of the chopped-off head high resistant transmission line
On line, the annular through groove of the final stage low-resistance transmission line is centrally located on the axis of the final stage high resistant transmission line.
Further, the chopped-off head low-resistance transmission line, final stage low-resistance transmission line are thin with the L-type of corresponding one end respectively
Line, impedance matching transmission line are formed in one.
Further, the chopped-off head low-resistance transmission line, final stage low-resistance transmission line are thin with the L-type of corresponding one end respectively
Line, impedance matching transmission line are molded for split.
Further, the chopped-off head low-resistance transmission line and final stage low-resistance transmission line are identical structure.
Implement the utility model, frequency suppress scope it is identical when, the frequency that is remarkably improved outside waveform free transmission range
Rate inhibition, reduce the series of low pass, low pass number of poles may decrease to 1/4-1/3 compared with the prior art, thus can be by low pass
That designs is smaller, has been advantageously implemented lightweight, the Miniaturization Design of wave filter.
【Brief description of the drawings】
Fig. 1 is the schematic diagram of the lowpass structures of prior art；
Fig. 2 is a kind of schematic diagram of new lowpass structures for cavity body filter provided by the utility model；
Fig. 3 is the frequency suppression curve schematic diagram of lowpass structures shown in Fig. 1；
Fig. 4 is the frequency suppression curve schematic diagram of lowpass structures shown in Fig. 2.
【Embodiment】
The utility model will be further described with reference to the accompanying drawings and examples.
With reference to figure 2, a kind of new lowpass structures provided by the utility model, it is mainly used in cavity body filter.This is new
Type lowpass structures include positioned at both ends two impedance matching portions 10 and between two impedance matching portions 10 according to
The secondary alternately multistage high resistant transmission line of connection and multistage low-resistance transmission line.High resistant transmission line uses the less copper cash of diameter, low-resistance
Transmission line is using the copper cash being relatively large in diameter.Low-resistance transmission line is square structure.In the present embodiment, impedance matching portion 10 be used for
With 50 ohmages.High resistant transmission line includes chopped-off head high resistant transmission line 31, first order high resistant transmission line 32, the transmission of second level high resistant
Line 33 and final stage high resistant transmission line 34.Chopped-off head high resistant transmission line 31, first order high resistant transmission line 32, second level high resistant transmission line 33
It is identical structure with final stage high resistant transmission line 34.Low-resistance transmission line includes first order low-resistance transmission line 52, second level low-resistance passes
Defeated line 53 and third level low-resistance transmission line 54.First order low-resistance transmission line 52 and third level low-resistance transmission line 54 are identical knot
Structure.The size of second level low-resistance transmission line 53 is more than first order low-resistance transmission line 52, the size of third level low-resistance transmission line 54.
The new lowpass structures also include set respectively and are set to chopped-off head high resistant transmission line 31, the chopped-off head of final stage high resistant transmission line 34
Low-resistance transmission line 51 and final stage low-resistance transmission line 55.Chopped-off head low-resistance transmission line 51, final stage low-resistance transmission line 55 are respectively with corresponding one
The impedance matching portion 10 at end connects and is respectively equipped with annular through groove 511,551 so that set is set to chopped-off head high resistant transmission line 31, end
Level high resistant transmission line 34.Chopped-off head low-resistance transmission line 51 does not contact with chopped-off head high resistant transmission line 31, final stage low-resistance transmission line 55 and end
Level high resistant transmission line 34 does not contact.The annular through groove 511,551 that chopped-off head low-resistance transmission line 51, final stage low-resistance transmission line 55 are set,
The matching impedance of corresponding one end low-resistance can be changed, the frequency inhibition being remarkably improved outside waveform free transmission range, reduced
The series of low pass, compared with the prior art low pass number of poles may decrease to 1/4-1/3, so as to being advantageously implemented the lightweight of wave filter
And Miniaturization Design.
In the present embodiment, chopped-off head low-resistance transmission line 51 and final stage low-resistance transmission line 55 are identical structure, are easy to manufacture.It is first
The annular through groove 511 of level low-resistance transmission line 51 is centrally located on the axis of chopped-off head high resistant transmission line 31, final stage low-resistance transmission line
55 annular through groove 551 is centrally located on the axis of final stage high resistant transmission line 34, is further improved close to waveform free transmission range
Outer frequency inhibition.
Further, impedance matching portion 10 includes impedance matching transmission line 11 and formed in impedance matching transmission line 11
The L-type fine rule 12 of one end.Impedance matching transmission line 11 and L-type fine rule 12 are all made up of copper cash.Impedance matching transmission line 11 is circle
Column construction.Chopped-off head high resistant transmission line 31, final stage high resistant transmission line 34, chopped-off head low-resistance transmission line 51, final stage low-resistance transmission line 55
Connected respectively with the L-type fine rule 12 of corresponding one end.The thickness of L-type fine rule 12 passes not less than 1.5 millimeters and no more than impedance matching
The external diameter of defeated line 10, it on the one hand can ensure to connect chopped-off head low-resistance transmission line 51, the rigidity of final stage low-resistance transmission line 55, the opposing party
Face can ensure not influenceing the filtering index of low pass.
Specifically, L-type fine rule 12 includes the horizontal part 122 of vertical portion 121 and formation on the top of vertical portion 121.Vertically
Portion 121 and horizontal part 122 are formed in one.Vertical portion 121 is formed in one end of impedance matching transmission line 10.Chopped-off head high resistant transmits
Line 31, final stage high resistant transmission line 34 connect with the vertical portion 121 of corresponding one end respectively.Chopped-off head low-resistance transmission line 51, final stage low-resistance
Transmission line 55 connects with the horizontal part 122 of corresponding one end respectively.Top surface, the final stage low-resistance transmission line 55 of chopped-off head low-resistance transmission line 51
The top surface either flush with the horizontal part 122 of corresponding one end respectively.The center of the annular through groove 511 of chopped-off head low-resistance transmission line 51
It is centrally located at the vertical portion 121 of corresponding one end on same horizontal line and the diameter of annular through groove 511 and vertical portion 121
Highly equal, the center of the annular through groove 551 of final stage low-resistance transmission line 55 is centrally located at together with the vertical portion 121 of corresponding one end
On one horizontal line and annular through groove 551 diameter it is equal with the height of vertical portion 121.It is compact-sized, it ensure that frequency suppresses
Effect.
The L-type fine rule 12 with corresponding one end, impedance matching pass respectively for chopped-off head low-resistance transmission line 51, final stage low-resistance transmission line 55
Defeated line 11 is formed in one, and is easy to manufacture.It should be understood that chopped-off head low-resistance transmission line 51, final stage low-resistance transmission line 55 respectively with
The L-type fine rule 12, impedance matching transmission line 11 of corresponding one end can also be that split is molded.
Fig. 3 is the frequency suppression curve schematic diagram of lowpass structures shown in Fig. 1, and Fig. 4 is the frequency suppression of lowpass structures shown in Fig. 2
Curve synoptic diagram processed.Suppress scope under the same conditions in frequency, shown from Fig. 3 simulation result as can be seen that in passband model
The suppression enclosed at the 2.5GHz frequencies at outer m5 points is only 37.3db, and is shown from Fig. 4 simulation result as can be seen that in passband
The suppression at 2.5GHz frequencies at the outer m4 points of scope has just reached 63.8db, and with respect to Fig. 3, frequency at this point suppresses to improve
71%, inhibition is notable, and the curve of m3 points to m4 points is more precipitous, the inhibition of frequency is more preferable.It follows that
When frequency suppression scope is identical, frequency inhibition is become apparent using structure of the present utility model, effect is more preferable, and can have
Effect reduces the series of low pass, smaller so as to which low pass is designed, and is advantageously implemented lightweight, the Miniaturization Design of wave filter.
Above example only expresses preferred embodiment of the present utility model, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the utility model patent scope can not be interpreted as.It should be pointed out that the ordinary skill for this area
For personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, such as to each implementation
Different characteristic in example is combined, and these belong to the scope of protection of the utility model.
Claims (10)
1. a kind of new lowpass structures for cavity body filter, including two impedance matching portions positioned at both ends and it is located at
The multistage high resistant transmission line alternately connected successively and multistage low-resistance transmission line between two impedance matching portions are described multistage high
Hindering in transmission line, chopped-off head high resistant transmission line, final stage high resistant transmission line connect with the impedance matching portion of corresponding one end respectively,
It is characterized in that：Also include set respectively and be set to the chopped-off head high resistant transmission line, the chopped-off head low-resistance transmission line of final stage high resistant transmission line
With final stage low-resistance transmission line, the impedance with corresponding one end respectively of the chopped-off head low-resistance transmission line, final stage low-resistance transmission line
With partly connecting and being respectively equipped with annular through groove chopped-off head high resistant transmission line, final stage high resistant transmission line are set to for covering；The chopped-off head
Low-resistance transmission line does not contact with the chopped-off head high resistant transmission line, and the final stage low-resistance transmission line and the final stage high resistant transmission line are not
Contact.
2. the new lowpass structures according to claim 1 for cavity body filter, it is characterised in that：The impedance matching
Part includes the L-type fine rule of impedance matching transmission line and formation in impedance matching transmission line one end, the chopped-off head high resistant transmission
Line, final stage high resistant transmission line, chopped-off head low-resistance transmission line, final stage low-resistance transmission line connect with the L-type fine rule of corresponding one end respectively
Connect.
3. the new lowpass structures according to claim 2 for cavity body filter, it is characterised in that：The L-type fine rule
Including vertical portion and horizontal part on vertical portion top is formed, the vertical portion is formed the one of the impedance matching transmission line
End, the chopped-off head high resistant transmission line, final stage high resistant transmission line connect with the vertical portion of corresponding one end respectively, and the chopped-off head is low
Transmission line, final stage low-resistance transmission line is hindered to connect with the horizontal part of corresponding one end respectively.
4. the new lowpass structures according to claim 3 for cavity body filter, it is characterised in that：The chopped-off head low-resistance
The top surface of transmission line, the top surface of final stage the low-resistance transmission line either flush with the horizontal part of corresponding one end respectively.
5. the new lowpass structures according to claim 3 for cavity body filter, it is characterised in that：The chopped-off head low-resistance
The center of the annular through groove of transmission line is centrally located on same horizontal line with the vertical portion of corresponding one end and annular is logical
The diameter of groove is equal with the height of vertical portion, and the center of the annular through groove of the final stage low-resistance transmission line is described with corresponding one end
Vertical portion is centrally located on same horizontal line and the diameter of annular through groove and the height of vertical portion are equal.
6. the new lowpass structures according to claim 2 for cavity body filter, it is characterised in that：The L-type fine rule
Thickness not less than 1.5 millimeters and no more than the impedance matching transmission line external diameter.
7. the new lowpass structures according to claim 1 for cavity body filter, it is characterised in that：The chopped-off head low-resistance
The annular through groove of transmission line is centrally located on the axis of the chopped-off head high resistant transmission line, the annular of the final stage low-resistance transmission line
Groove is centrally located on the axis of the final stage high resistant transmission line.
8. the new lowpass structures according to claim 2 for cavity body filter, it is characterised in that：The chopped-off head low-resistance
Transmission line, final stage low-resistance transmission line are formed in one with the L-type fine rule, impedance matching transmission line of corresponding one end respectively.
9. the new lowpass structures according to claim 2 for cavity body filter, it is characterised in that：The chopped-off head low-resistance
The L-type fine rule with corresponding one end, impedance matching transmission line are molded for split respectively for transmission line, final stage low-resistance transmission line.
10. the new lowpass structures according to claim 1 for cavity body filter, it is characterised in that：The chopped-off head is low
It is identical structure to hinder transmission line and final stage low-resistance transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720479604.8U CN206774649U (en) | 2017-05-03 | 2017-05-03 | A kind of new lowpass structures for cavity body filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720479604.8U CN206774649U (en) | 2017-05-03 | 2017-05-03 | A kind of new lowpass structures for cavity body filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206774649U true CN206774649U (en) | 2017-12-19 |
Family
ID=60649260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720479604.8U Active CN206774649U (en) | 2017-05-03 | 2017-05-03 | A kind of new lowpass structures for cavity body filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206774649U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953147A (en) * | 2017-05-03 | 2017-07-14 | 深圳市国人射频通信有限公司 | A kind of new lowpass structures for cavity body filter |
| US20230018912A1 (en) * | 2018-06-12 | 2023-01-19 | Kmw Inc. | Cavity filter and connecting structure included therein |
-
2017
- 2017-05-03 CN CN201720479604.8U patent/CN206774649U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953147A (en) * | 2017-05-03 | 2017-07-14 | 深圳市国人射频通信有限公司 | A kind of new lowpass structures for cavity body filter |
| CN106953147B (en) * | 2017-05-03 | 2019-11-05 | 深圳市国人射频通信有限公司 | A kind of novel lowpass structures for cavity body filter |
| US20230018912A1 (en) * | 2018-06-12 | 2023-01-19 | Kmw Inc. | Cavity filter and connecting structure included therein |
| US11817643B2 (en) * | 2018-06-12 | 2023-11-14 | Kmw Inc. | Cavity filter and connecting structure included therein |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206774649U (en) | A kind of new lowpass structures for cavity body filter | |
| WO2021068670A1 (en) | Filter circuit and method for improving performance of filter circuit, and signal processing device | |
| CN206098636U (en) | Wide band three routes combiner | |
| WO2021068668A1 (en) | Filter circuit, method for improving performance of filter circuit, and signal processing device | |
| CN207587939U (en) | A kind of four passband microstrip filters | |
| CN103281046A (en) | Implementation method for band-pass filter with double out-of-band transmission zeros | |
| CN106953147B (en) | A kind of novel lowpass structures for cavity body filter | |
| CN108023150A (en) | Balanced-unbalanced transformer | |
| CN201689958U (en) | Microwave filter | |
| CN209843916U (en) | Dielectric waveguide filter | |
| CN106454190B (en) | Band-pass filter with broadband high out-of-band rejection | |
| CN207967263U (en) | A kind of cross-linked coaxial low-pass filter of band | |
| CN206135846U (en) | There is high suppression degree of outband just to require high pass filter of in -band flatness | |
| CN110729978A (en) | High-frequency common mode rejection circuit and electrical apparatus | |
| CN206272584U (en) | A kind of SAW filter with interior match circuit | |
| CN104332683B (en) | A kind of dual-passband hexagon wave filter for being applied to PCS ＆ WiMAX frequency ranges | |
| CN109217836A (en) | Four port low-reflection type duplexer filters | |
| CN201725859U (en) | Open-loop coupling bandpass filter based on micro-strip interdigital capacitor | |
| CN108347230A (en) | A kind of miniaturization orthogonal type LTCC couplers using new topological structure | |
| CN101794926A (en) | Band-pass filter based on pentagon closed loop resonator | |
| CN208298986U (en) | A kind of image-reject filter | |
| CN208045660U (en) | A kind of multichannel duplexer | |
| CN205595430U (en) | Triplexer | |
| CN206259470U (en) | A kind of three port combiners of seven frequency | |
| CN111430854A (en) | Single-block three-mode dielectric filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 5th floor, building 1, Guoren science and Technology Park, the intersection of Jinxiu middle road and Cuijing Road, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Guoren Technology Co., Ltd Address before: 518000. B building 1F, three national building, science and technology, Shizhong District, Nanshan District hi tech Zone, Guangdong, Shenzhen Patentee before: Shenzhen GrenTech Corporation |