CN204361235U - Tubulose harmonics restraint low pass filter - Google Patents
Tubulose harmonics restraint low pass filter Download PDFInfo
- Publication number
- CN204361235U CN204361235U CN201420822525.9U CN201420822525U CN204361235U CN 204361235 U CN204361235 U CN 204361235U CN 201420822525 U CN201420822525 U CN 201420822525U CN 204361235 U CN204361235 U CN 204361235U
- Authority
- CN
- China
- Prior art keywords
- low
- impedance line
- pass filter
- low pass
- tubulose
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- Expired - Fee Related
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- Control Of Motors That Do Not Use Commutators (AREA)
- Filters And Equalizers (AREA)
Abstract
The utility model is tubulose harmonics restraint low pass filter, and solve Conventional filters volume comparatively large, debugging difficulty is large, and the signal suppressing of far-end is inadequate, not by the problem of high-power signal.The low-impedance line (3) having some spaced radials to distribute in teflon tube (2), the two ends of teflon tube (2) have 50 ohmage lines (1) to be connected with the low-impedance line (3) being positioned at port, whole low-impedance line (3) is ganged up by axial high impedance line (4), the diameter of low-impedance line (3) is equal with polytetrafluoroethylene bore, and its length is 0.5mm ~ 2mm; High impedance line (4) is for cylindrical, and length range regulates between 3 ~ 8mm.
Description
technical field:
The utility model is relevant with suppressing the low pass filter of far-end harmonic.
background technology:
Along with the development of mobile communication, communication quality for receive-transmit system interference each other and user has had higher requirement, and the quantity of present frequency segmentation is increased severely day by day, there is the frequency range of various different industries all in work, this just makes, the signal having various different frequencies in same channel transmits simultaneously, if between two or more signal or more the signal of far-end suppresses inadequate mutually, will make interference mutually occurs between different signals.
Also diversified filter on Vehicles Collected from Market, but the frequency multiplication of these Conventional filters suppresses not to be far, and multiple frequence suppresses the conventional structure of low pass filter to be just difficult to realization.Usually realizing low pass filter is all adopt the structures such as same LC, micro-band or general cavity to realize, but the filter of this class formation is only suitable for for the higher type of near-end rejection ratio, and more existing Conventional filters mainly contain following feature:
1. more existing low pass filter suppresses the ability of far-end harmonic poor, generally just there will be to the harmonic wave of far-end when four or five octaves, also to contact again later the low pass of a corresponding frequencies to suppress farther harmonic wave, this mode volume is larger, debugging difficulty is large, for present miniaturized products do not have can be practical advantage.
2. the relatively present this multiple frequence of the index of the low pass filter of general type suppresses low pass filter suppression far short of what is expected, particularly far-end.The low pass filter of some conventional structures, not by high-power, can only bear low power signal.
utility model content:
The purpose of this utility model is to provide a kind of assembling, and easily, volume reduces, and cost is low in debugging, suppresses the ability of far-end harmonic strong, by the tubulose harmonics restraint low pass filter of high-power signal.
The utility model is achieved in that
The low-impedance line 3 having some spaced radials to distribute in teflon tube 2 and high resistant line 4, the two ends of teflon tube 2 have 50 ohmage lines 1 to be connected with the low-impedance line 3 being positioned at port, and whole low-impedance line 3 is ganged up by axial high impedance line 4.
The beneficial effects of the utility model:
The far-end harmonic that the utility model volume is little, can be suppressed to multiple frequence, the power capacity born are large.The utility model is by height impedance transformation signal transmission, and teflon tube mainly supports the effect of high and low impedance piece, and the diameter of high and low impedance piece and length mainly regulate the scope of frequency.This mode just makes whole filter have high q-factor, and the performance of whole tubulose harmonics restraint low pass filter is improved greatly.The utility model process, assembling, debugging is very simple, and volume reduces greatly, has abdicated more space and all large reduction of weight and cost is many on complete machine.Even if volume reduces but other electrical performance indexes does not become, in the process used, index is reliable and stable.The frequency range of passband also can be entered to change one's profession design according to the actual requirements, adopts and one can reduce volume in this way, and two is the harmonic waves after can making to be suppressed to more multi-octave.The utility model compact conformation, all adopt coaxial line be made, so bear in power than other types low pass filter have more advantage.
accompanying drawing illustrates:
Fig. 1 is the principle of lowpass filter figure had the sixth of the twelve Earthly Branches.
Fig. 2 is equivalent circuit diagram of the present utility model.
Fig. 3 is structure chart of the present utility model.
Fig. 4 is the left view of Fig. 3.
embodiment:
The low-impedance line 3 that some spaced radials distribute is had in teflon tube 2, the two ends of teflon tube 2 have 50 ohmage lines 1 to be connected with the low-impedance line 3 being positioned at port, whole low-impedance line 3 is ganged up by axial high impedance line 4, the diameter of low-impedance line 3 is equal with polytetrafluoroethylene bore is 10mm, and low-impedance line 3 length being positioned at port is 1mm; The length of other low-impedance lines 3 is 3mm.High impedance line 4 is cylindrical, and its length is 5mm, and its diameter is 2mm.The diameter of 50 ohmage lines 1 is 4mm, and its length is 4mm.
The utility model is made up of teflon tube, high impedance sheet, Low ESR sheet part, and it is mainly by height impedance transformation signal transmission.Teflon tube mainly supports the effect of high and low impedance line, and the diameter of high and low impedance line and length mainly regulate the scope of frequency.This mode just makes whole filter have high q-factor, and the performance of whole tubulose harmonics restraint low pass filter is improved greatly, is also to press down ripple situation about not suppressing to existing conventional low pass filter to far-end to have breakthrough.Following device description is used in the technical program:
Be connected with the low-impedance line 3 being positioned at port by 50 ohmage lines 1, whole low-impedance line 3 is ganged up by axial high impedance line 4, then the entirety after connecting all is encased in teflon tube 2.
Claims (1)
1. tubulose harmonics restraint low pass filter, it is characterized in that the low-impedance line (3) having some spaced radials to distribute in teflon tube (2), the two ends of teflon tube (2) have 50 ohmage lines (1) to be connected with the low-impedance line (3) being positioned at port, whole low-impedance line (3) is ganged up by axial high impedance line (4), the diameter of low-impedance line (3) is equal with polytetrafluoroethylene bore, and its length is 0.5mm ~ 2mm; High impedance line (4) is for cylindrical, and length range regulates between 3 ~ 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420822525.9U CN204361235U (en) | 2014-12-23 | 2014-12-23 | Tubulose harmonics restraint low pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420822525.9U CN204361235U (en) | 2014-12-23 | 2014-12-23 | Tubulose harmonics restraint low pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204361235U true CN204361235U (en) | 2015-05-27 |
Family
ID=53262687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420822525.9U Expired - Fee Related CN204361235U (en) | 2014-12-23 | 2014-12-23 | Tubulose harmonics restraint low pass filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204361235U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113193315A (en) * | 2021-04-29 | 2021-07-30 | 中航光电科技股份有限公司 | Whole machine solderless low pass filter |
-
2014
- 2014-12-23 CN CN201420822525.9U patent/CN204361235U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113193315A (en) * | 2021-04-29 | 2021-07-30 | 中航光电科技股份有限公司 | Whole machine solderless low pass filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20181223 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |