CN206947482U - Multistage point wave filter based on quasi-elliptic function - Google Patents
Multistage point wave filter based on quasi-elliptic function Download PDFInfo
- Publication number
- CN206947482U CN206947482U CN201720721443.9U CN201720721443U CN206947482U CN 206947482 U CN206947482 U CN 206947482U CN 201720721443 U CN201720721443 U CN 201720721443U CN 206947482 U CN206947482 U CN 206947482U
- Authority
- CN
- China
- Prior art keywords
- section
- high impedance
- impedance section
- resonator
- low esr
- 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
Abstract
The utility model discloses set two and above resonator between multistage the point wave filter, including input and output end, including input and output end based on quasi-elliptic function；The quantity of resonator is even number；Resonator includes the first high impedance section, the first Low ESR section, the second high impedance section, the second Low ESR section and the 3rd high impedance section being sequentially connected；First high impedance section, the first Low ESR section, the second high impedance section, the second Low ESR section and the 3rd high impedance section form the loop configuration with an opening, and opening, between the first high impedance section and the 3rd high impedance section, the first high impedance section, the first Low ESR section, the second high impedance section, the total length of the second Low ESR section and the 3rd high impedance section use microwave wavelength.Multistage point wave filter of the utility model based on quasi-elliptic function, makes said structure by resonator, realizes and do not need ground hole, while coupling effect is fabulous, and then forms and be easily integrated and the wave filter of high out-of-side rejection.
Description
Technical field
It the utility model is related to field of microwave communication, and in particular to the multistage point wave filter based on quasi-elliptic function.
Background technology
Microwave filter, for filtering or separating the element of different microwave frequency signals.Microwave filter divides low pass, height
Logical, band logical and with four types of resistance (high pass commonly uses wide band bandpass filter replacement), their structure, parameter and design side
Method has marked difference because of indexs such as different working frequencies, frequency bandwidth, power capacities.In microwave circuit system, filtering
The performance of device has a great impact to the performance indications of circuit, therefore how to design one and have high performance wave filter, right
Design microwave circuit system tool has very important significance.Microstrip circuit has a small volume, many advantages, such as in light weight, bandwidth,
Be widely used in recent years in microwave circuit system, wherein with micro-strip do wave filter be its mainly using one of.
But existing microstrip filter, when using ground hole, micro-strip cabling is unfavorable for integrating, without using ground hole
When, coupling effect is very poor, so as to cause Out-of-band rejection effect bad.
Utility model content
Technical problem to be solved in the utility model is existing microstrip filter, and when using ground hole, micro-strip is walked
Line is unfavorable for integrating, without using ground hole when, coupling effect is very poor, so as to cause Out-of-band rejection effect bad, it is therefore intended that
Multistage point wave filter based on quasi-elliptic function is provided, solved the above problems.
The utility model is achieved through the following technical solutions：
Multistage point wave filter based on quasi-elliptic function, including input and output end, it is described including input and output
Two and above resonator are set between end；The quantity of the resonator is even number；The resonator includes the be sequentially connected
One high impedance section, the first Low ESR section, the second high impedance section, the second Low ESR section and the 3rd high impedance section；First high resistant
Anti- section, the first Low ESR section, the second high impedance section, the second Low ESR section and the 3rd high impedance section form the ring with an opening
Shape structure, and be open between the first high impedance section and the 3rd high impedance section, the first high impedance section, the first Low ESR
The total length of section, the second high impedance section, the second Low ESR section and the 3rd high impedance section uses microwave wavelength.
In the prior art, microstrip filter, when using ground hole, micro-strip cabling is unfavorable for integrating, without using ground connection
Kong Shi, coupling effect is very poor, so as to cause Out-of-band rejection effect bad.When the utility model is applied, the first high impedance section, first
Low ESR section, the second high impedance section, the second Low ESR section and the 3rd high impedance section constitute an all-wave length stepped impedance resonance
Device, coupling can be achieved without ground hole, and the coupling effect between adjacent resonator is than common resonator
It is substantially improved, and due to being open on the resonator, not with the resonator adjacent other theoretical according to quasi-elliptic function
Resonator can also be realized with the resonator and coupled, and limit is formed at each resonator, so as to further increase coupling
Effect, and then improve Out-of-band rejection.Resonator is made said structure by the utility model, is realized and is not needed ground hole,
Coupling effect is fabulous simultaneously, and then forms and be easily integrated and the wave filter of high out-of-side rejection.
Further, the loop configuration of the adjacent resonator, opening direction are opposite；Between the adjacent resonator
Distance be 0.3~0.4mm.
When the utility model is applied, inventor is had found the loop configuration of adjacent resonator, and opening direction will be on the contrary, and will
When the distance between adjacent resonator is 0.3~0.4mm, wave filter reaches highest Out-of-band rejection.
Further, the width of the first high impedance section, the second high impedance section and the 3rd high impedance section is equal, and is
0.1~0.3mm.
Further, the width of the first Low ESR section and the second Low ESR section is equal, and is 0.6~0.8mm.
Further, the input is connected to the resonator nearest with input；The output end is connected to and exported
Hold nearest resonator.
The utility model compared with prior art, has the following advantages and advantages：
Multistage point wave filter of the utility model based on quasi-elliptic function, makes said structure by resonator, realizes i.e.
Ground hole is not needed, while coupling effect is fabulous, and then form and be easily integrated and the wave filter of high out-of-side rejection.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, the restriction to the utility model embodiment is not formed.In the accompanying drawings：
Fig. 1 is the utility model structure diagram.
Mark and corresponding parts title in accompanying drawing：
1- inputs, 2- output ends, 3- resonators, 31- the first high impedance sections, 32- the first Low ESR sections, 33- second are high
Impedance section, 34- the second Low ESR sections, the high impedance sections of 35- the 3rd.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, it is not intended as to restriction of the present utility model.
Embodiment
As shown in figure 1, multistage point wave filter of the utility model based on quasi-elliptic function, including input 1 and output end
2, it is described including setting two and above resonator 3 between input 1 and output end 2；The quantity of the resonator 3 is even number；
The first high impedance section 31, the first Low ESR section 32, the second high impedance section 33, second that the resonator 3 includes being sequentially connected are low
The high impedance section 35 of impedance section 34 and the 3rd；The first high impedance section 31, the first Low ESR section 32, the second high impedance section 33,
Two Low ESR sections 34 and the 3rd high impedance section 35 form the loop configuration with an opening, and opening is located at the first high impedance section
31 and the 3rd between high impedance section 35；The first high impedance section 31, the first Low ESR section 32, the second high impedance section 33, second
The total length of the high impedance section 35 of Low ESR section 34 and the 3rd uses microwave wavelength.The loop configuration of the adjacent resonator 3, is opened
Mouth is in opposite direction；The distance between described adjacent resonator 3 is 0.3~0.4mm.The first high impedance section 31, second is high
The width of the high impedance section 35 of impedance section 33 and the 3rd is equal, and is 0.1~0.3mm.The first Low ESR section 32 and second
The width of Low ESR section 34 is equal, and is 0.6~0.8mm.The input 1 is connected to the resonator 3 nearest with input 1；
The output end 2 is connected to the resonator 3 nearest with output end 2.
When the present embodiment is implemented, the first high impedance section 31, the first Low ESR section 32, the second high impedance section 33, the second low-resistance
Anti- section 34 and the 3rd high impedance section 35 constitute an all-wave length step electric impedance resonator, can be achieved without ground hole
Coupling, and the coupling effect between adjacent resonator 3 is substantially improved than common resonator, and due to the resonator 3
On be open, theoretical according to quasi-elliptic function, other not adjacent with the resonator 3 resonators 3 can also be with the resonator 3
Coupling is realized, and limit is formed at each resonator 3, so as to further increase coupling effect, and then is improved with outer suppression
System.Resonator is made said structure by the utility model, is realized and is not needed ground hole, while coupling effect is fabulous, and then
Form and be easily integrated and the wave filter of high out-of-side rejection.Inventor is had found the loop configuration of adjacent resonator 3, opening
When being in the opposite direction, and by the distance between adjacent resonator 3 0.3~0.4mm, wave filter reaches highest Out-of-band rejection.
Above-described embodiment, the purpose of this utility model, technical scheme and beneficial effect are entered
One step describes in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, it is all within the spirit and principles of the utility model, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of the utility model.
Claims (5)
1. the multistage point wave filter based on quasi-elliptic function, including input (1) and output end (2), it is characterised in that the bag
Include two and above resonator (3) of setting between input (1) and output end (2)；The quantity of the resonator (3) is even number；
The resonator (3) includes the first high impedance section (31), the first Low ESR section (32), the second high impedance section being sequentially connected
(33), the second Low ESR section (34) and the 3rd high impedance section (35)；The first high impedance section (31), the first Low ESR section
(32), the second high impedance section (33), the second Low ESR section (34) and the 3rd high impedance section (35) form the ring with an opening
Shape structure, and be open between the first high impedance section (31) and the 3rd high impedance section (35)；The first high impedance section (31),
First Low ESR section (32), the second high impedance section (33), the total length of the second Low ESR section (34) and the 3rd high impedance section (35)
Using microwave wavelength.
2. the multistage point wave filter according to claim 1 based on quasi-elliptic function, it is characterised in that described adjacent humorous
Shake the loop configuration of device (3), opening direction is opposite；The distance between described adjacent resonator (3) is 0.3~0.4mm.
3. the multistage point wave filter according to claim 1 based on quasi-elliptic function, it is characterised in that first high resistant
The width of anti-section (31), the second high impedance section (33) and the 3rd high impedance section (35) is equal, and is 0.1~0.3mm.
4. the multistage point wave filter according to claim 1 based on quasi-elliptic function, it is characterised in that first low-resistance
The width of anti-section (32) and the second Low ESR section (34) is equal, and is 0.6~0.8mm.
5. the multistage point wave filter according to claim 1 based on quasi-elliptic function, it is characterised in that the input
(1) it is connected to and the nearest resonator (3) of input (1)；The output end (2) is connected to and the nearest resonance of output end (2)
Device (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720721443.9U CN206947482U (en) | 2017-06-20 | 2017-06-20 | Multistage point wave filter based on quasi-elliptic function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720721443.9U CN206947482U (en) | 2017-06-20 | 2017-06-20 | Multistage point wave filter based on quasi-elliptic function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206947482U true CN206947482U (en) | 2018-01-30 |
Family
ID=61365512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720721443.9U Active CN206947482U (en) | 2017-06-20 | 2017-06-20 | Multistage point wave filter based on quasi-elliptic function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206947482U (en) |
-
2017
- 2017-06-20 CN CN201720721443.9U patent/CN206947482U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209374645U (en) | Anti-interference filter and communication equipment | |
| CN201063353Y (en) | Cavity filter with naught cavity | |
| CN105552494B (en) | A kind of adjustable plane bandpass and band-rejection filter | |
| CN205680768U (en) | Micro-strip open loop wave filter | |
| CN201528031U (en) | L-type coupled-structure dual-mode microstrip bandpass filter | |
| CN110429363A (en) | A kind of three passband function filter-dividers based on multimode fork-shaped resonator | |
| CN206602160U (en) | Bandpass filter based on toroidal cavity resonator and double minor matters open-circuited loads | |
| CN108287937A (en) | Highly selective compact bandpass filter and its design method | |
| CN101635383A (en) | Micro-strip dual-mode filter with intensified coupling and harmonic suppression characteristics | |
| CN109088134B (en) | Microstrip band-pass filter | |
| CN103972615B (en) | Novel low pass filtering access and adopt its communication cavity device | |
| CN204927460U (en) | Improve out of band rejection's broad band filter | |
| CN206893772U (en) | A kind of ceramic waveguide wave filter | |
| CN206947482U (en) | Multistage point wave filter based on quasi-elliptic function | |
| CN104282970B (en) | A kind of DBR filters and DBR duplexers | |
| CN104143675B (en) | Cross-linked bandpass filter and its design method | |
| CN107425240A (en) | A kind of wave filter with multiple loop configuration | |
| CN210723304U (en) | Filter and topology | |
| CN203300775U (en) | Weak coupling cavity filter | |
| CN106532204B (en) | A kind of micro-strip puppet comb tape pass filter structure | |
| CN208655855U (en) | A kind of novel medium interdigital filter | |
| CN207303310U (en) | Cable | |
| CN103326090B (en) | Tee joint band high-temperature superconducting filter | |
| CN207282679U (en) | A kind of compact-sized bimodule band-pass filter | |
| CN204947044U (en) | Micro-band parallel coupling filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |