CN106410468A - Chain pi-type filter pin assembly - Google Patents
Chain pi-type filter pin assembly Download PDFInfo
- Publication number
- CN106410468A CN106410468A CN201611071592.1A CN201611071592A CN106410468A CN 106410468 A CN106410468 A CN 106410468A CN 201611071592 A CN201611071592 A CN 201611071592A CN 106410468 A CN106410468 A CN 106410468A
- Authority
- CN
- China
- Prior art keywords
- contact pin
- ferrite
- adapter sleeve
- pin
- tubes
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/04—Pins or blades for co-operation with sockets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters
- H01R13/7193—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters with ferrite filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0153—Electrical filters; Controlling thereof
Abstract
The invention provides a chain pi-type filter pin assembly, which comprises a pin and a wiring end. The tail end of the pin is connected with the wiring end. The chain pi-type filter pin assembly also comprises a plurality of ferrite tubes, a plurality of ceramic capacitor tubes and at least one connection sleeve. The ferrite tubes are in one-to-one correspondence with the ceramic capacitor tubes; the plurality of ferrite tubes are arranged at the outer sides of the pin in sequence; the ceramic capacitor tubes are arranged at the outer sides of the corresponding ferrite tubes respectively; the at least one connection sleeve is also sleeved on the outer sides of the pin; and each connection sleeve is arranged between any two adjacent ferrite tubes and the corresponding two adjacent ceramic capacitor tubes. Compared with an existing low-pass single-section pi-type filter pin, two-section chained pi-type filter pin enables the attenuation index of the product in low frequency band to be improved obviously, thereby greatly improving anti-interference capability of the product.
Description
Technical field
The present invention relates to the contact pin component that a kind of filter connector uses, particularly to a kind of chain connection π type filtering pin groups
Part.
Background technology
At present, the filtered version of the filtering contact pin used in low-pass wave filtering connector is mainly the filtering of single-unit π type.As figure
Shown in 1, single-unit π type filtering contact pin is by contact pin 11a, coaxial ferrite tube 13a, coaxial ceramic condenser pipe 14a and wiring pin 12a etc.
Part forms.Wherein ferrite tube 13a plays the effect of inducer in filter connector, forms " π " type with ceramic condenser pipe 14a
Tubulose wave filter；As shown in Fig. 2 being a kind of by input electricity by the single-unit π type filter circuit that single-unit π type filtering contact pin is constituted
(R is resistance to the low-pass filter circuit that appearance, inductance and three elements of output capacitance are constituted, L is inductance, C is electric capacity, U1 is input
Voltage, U2 are output voltage).
After the single-unit π type filtering contact pin integrated loading adapter of prior art, its attenuation requirement is minimum in 10MHz to decline
It is kept to 15dB (measured value is 20dB), during 100MHz, minimum attenuation is 50dB (measured value is 60dB)；Although its attenuation requirement is equal
Meet GJB1308《Filter connector test method》Regulation, cut-off frequency be 0.5～1MHz, in 10MHz, minimum attenuation is
When 15dB, 100MHz, minimum attenuation is 50dB.But propose new requirement in R＆D process in some equipment, minimum
Decay indices rise to：It is 40dB in 10MHz, be 90dB in 100MHz, but cut-off frequency should meet the rule of GJB1308
Determine it is seen that the low-pass wave filtering connector researched and developed before cannot meet new anti-interference requirement.
Content of the invention
The technical problem to be solved is the cut-off frequency phase providing a kind of cut-off frequency and single-unit pi type filter
Chain connection π type filtering contact pin component that is same, meeting attenuation requirement.
For solving above-mentioned technical problem, the invention provides a kind of chain connection π type filtering contact pin component, including contact pin and wiring
Foot, contact pin tail end is connected with wiring pin；
Also include some ferrite tube, some ceramic condenser pipes and at least one adapter sleeve, described ferrite tube and described
Ceramic condenser pipe is to correspond, and some ferrite tube are sleeved on outside contact pin successively, and described ceramic condenser pipe box is contained in correspondence
Ferrite tube outside, described adapter sleeve is equally sleeved on outside contact pin, and each adapter sleeve is in two ferrites of arbitrary neighborhood
Between pipe and corresponding two neighboring ceramic condenser pipe.
After such structure, compared with existing low pass single-unit π type filtering pin layout, two pitch chain connection π type filtering
The application of contact pin, so that product has obtained obvious improvement in the decay indices of low-frequency range, substantially increases the anti-interference of product
Ability.
For the clearer technology contents understanding the present invention, below this chain connection π type filtering contact pin component is referred to as this
Contact pin component.
This contact pin component includes two ferrite tube, two ceramic condenser pipes and an adapter sleeve, and adapter sleeve is in two
Between ferrite tube and two ceramic condenser pipes；After such structure, the structure of this contact pin component is more reasonable, is optimum
The embodiment changed.
The adapter sleeve of this contact pin component includes the first spacer ring portion and the outside obstruct that inner side intercepts two neighboring ferrite tube
Second spacer ring portion of two neighboring ceramic condenser pipe, the first spacer ring portion is inserting in the width of contact pin axial direction and the second spacer ring portion
The width of pin axial direction is different；After such structure, the first spacer ring portion and the second spacer ring portion not only can intercept adjacent
Two ferrite tube and two neighboring ceramic condenser pipe, and the width in the first spacer ring portion is different from the width in the second spacer ring portion can
To produce staggered floor, and then the position by ferrite tube and ceramic condenser pipe restriction adapter sleeve, reduce the probability coming off.
Brief description
Fig. 1 is the structural representation that prior art single-unit π type filters contact pin.
Fig. 2 is the π type filter circuit schematic diagram that prior art single-unit π type filters contact pin.
Fig. 3 is the structural representation of this contact pin component embodiment.
Fig. 4 is the schematic diagram of this contact pin component embodiment adapter sleeve.
Fig. 5 is the circuit theory diagrams of this contact pin component embodiment adapter sleeve.
Fig. 6 is the algorithm performance schematic diagram of each pi type filter in this contact pin component embodiment.
Fig. 7 is the relation curve of 25 DEG C of minimum attenuation of this contact pin component embodiment and frequency.
Specific embodiment
As shown in Figs. 3-4
This contact pin component includes contact pin 11, wiring pin 12,15, two ferrite tube 13 of adapter sleeve and two ceramic condenser pipes
14.
Contact pin 11 tail end and wiring pin 12 are welded and fixed, and wiring pin 12 is used for fixing with outer lead.
Two ferrite tube 13 and two ceramic condenser pipes 14 are one-to-one relationship, and two ferrite tube 13 are sleeved on successively
Outside contact pin 11, two ceramic condenser pipes 14 are sleeved on outside corresponding ferrite tube 13, and adapter sleeve 15 is in two ferrites
Between pipe 13 and two ceramic condenser pipes 14；Adapter sleeve 15 includes the first spacer ring portion 15a and outside the second spacer ring portion of inner side
15b, the first spacer ring portion 15a intercept the first spacer ring portion 15a of two ferrite tube 13, and the second spacer ring portion 15b intercepts two potteries
Capacitance tube 14, the first spacer ring portion 15a is more than the second spacer ring portion 15b in contact pin 11 axial direction in the width of contact pin 11 axial direction
Width.
The circuit theory of this contact pin component is shown in Fig. 5.
In filter circuit, the size of cut-off frequency and the quality of fade performance depend greatly on capacitance
Size, therefore, the selection of capacitance size is the key in whole filter circuit design.
Below, we according to《Radiotechnics basis》Middle chapter 4 be given with regard to filter cutoff frequency and pad value
Computing formula, the size of capacitance is calculated：
Fc=1/ π RC (1)
β=arcch [2 (f/fc) 2-1]
=8.7ln [4 (f/fc) 2-2] (2)
In formula：(f be frequency, Hz), (fc is cut-off frequency, Hz), (R is characteristic impedance, Ω), (C is electric capacity, F), (β is
Pad value, dB).
The technical specification of contract requirement is substituted into formula (2), can obtain：
β ＞ 4dB fc ＜ 1MHz during f=1MHz
F=10MHz β ＞ 40dB fc ＜ 2MHz
F=100MHz β ＞ 90dB fc ＜ 1.1MHz
Therefore, only fc ＜ 1MHz could meet contracted pad value requirement.Meanwhile, as the signal of telecommunication by with cut
Critical point only, cut-off frequency is only more than certain numerical value, allows useful signal to pass through, guarantee product electrical property
Reliability.Based on contract require, 0.5MHz ＜ fc ＜ 1MHz, substitute into formula (1), can obtain：
6400pF ＜ C ＜ 12000pF (the load impedance R=50 Ω of this product)；
The position of minimum capacitance choosing single-unit π type filtering tube is 8000pF, for the filter circuit of two assistant warden connection：
Series arm impedance Z 1=2j ω L；
Parallel arm impedance Z 2=-j/2 ω C；
In formulaAngular frequency for low pass filter.
According to formula：
Formula (3) is substituted into formula (4), can obtain：
β=arcch [8 (f/fc) 2-1]
=8.7ln [16 (f/fc) 2-2] (5)
Formula (5) is compared with formula (2) and understands, two pitch chains join the cut-off frequency of pi type filter and cutting of single-unit pi type filter
Only frequency is identical, but decay has obvious change, and result refers to Fig. 6, and (in Fig. 6,1 is single-unit pi type filter, and 2 is two assistant wardens
Connection pi type filter, 3 is three assistant warden connection pi type filters).
According to the algorithm value that formula (4.5) calculates each frequency it is：
As f=1M, β=35dB ＞ 4dB；
As f=10M, β=76dB ＞ 40dB；
As f=100M, β=116dB ＞ 90dB
Calculated as can be seen that the filter element of filtering contact pin joins π type low pass filter using two pitch chains and can expire by above
Sufficient attenuation requirement.
According to above-mentioned calculating and result of the test, the structure design by this filtering contact pin is：Appearance surface cover in metal ferrule
Upper two coaxial ferrite tube, ferrite tube plays the effect of inducer in filter connector.Appearance surface cover in ferrite tube
Upper two coaxial ceramic condenser pipes, ceramic condenser pipe and ferrite tube composition " π " type tubulose wave filter.Save " π " type low pass two
It is designed with metal canula, its effect is to make π type low pass filter contact reliability, stable performance between wave filter.This tubulose
Filter element just constitutes filtering contact pin together with common contact pin
Require this product filtering performance is tested according to new research and development, filtering performance is shown in Table 1, decay when 25 DEG C
Test curve (relation curve of minimum attenuation and frequency) is shown in Fig. 7.
Table 1 filtering performance
By above analysis as can be seen that join the filtering contact pin integrated loading adapter of π type low pass filter using two pitch chains
Afterwards it is achieved that the several functions such as shielding, ground connection and filtering, meet the use requirement of whole machine.
Above-described is only one embodiment of the present invention it is noted that for those of ordinary skill in the art
For, under the premise without departing from the principles of the invention, some modifications and improvement can also be made, these also should be regarded as belonging to this
Bright protection domain.
Claims (3)
1. a kind of chain connection π type filtering contact pin component, including contact pin and wiring pin, contact pin tail end is connected with wiring pin；
It is characterized by：
Also include some ferrite tube, some ceramic condenser pipes and at least one adapter sleeve, described ferrite tube and described pottery
Capacitance tube is to correspond, and some ferrite tube are sleeved on outside contact pin successively, and described ceramic condenser pipe box is contained in corresponding ferrum
Outside oxysome pipe, described adapter sleeve is equally sleeved on outside contact pin, each adapter sleeve be in two ferrite tube of arbitrary neighborhood and
Between corresponding two neighboring ceramic condenser pipe.
2. chain connection π type filtering contact pin component according to claim 1, is characterized in that：
Including two ferrite tube, two ceramic condenser pipes and an adapter sleeve, adapter sleeve is in two ferrite tube and two
Between ceramic condenser pipe.
3. chain connection π type filtering contact pin component according to claim 1, is characterized in that：
Described adapter sleeve includes the first spacer ring portion and the two neighboring pottery of outside obstruct that inner side intercepts two neighboring ferrite tube
Second spacer ring portion of capacitance tube, the first spacer ring portion is in the width of contact pin axial direction and the second spacer ring portion in contact pin axial direction
Width is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611071592.1A CN106410468A (en) | 2016-11-29 | 2016-11-29 | Chain pi-type filter pin assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611071592.1A CN106410468A (en) | 2016-11-29 | 2016-11-29 | Chain pi-type filter pin assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106410468A true CN106410468A (en) | 2017-02-15 |
Family
ID=58082391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611071592.1A Pending CN106410468A (en) | 2016-11-29 | 2016-11-29 | Chain pi-type filter pin assembly |
Country Status (1)
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|---|---|
| CN (1) | CN106410468A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113612462A (en) * | 2021-07-21 | 2021-11-05 | 杭州电子科技大学 | Full-adjustable band-pass filter based on tubular filter structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599599A (en) * | 2008-06-02 | 2009-12-09 | 中航光电科技股份有限公司 | A kind of π type filtering electrical connector and π type filtering member thereof |
| EP2529790A1 (en) * | 2011-06-03 | 2012-12-05 | Greatbatch Ltd. | Feedthrough wire connector for use in a medical device |
| CN102891381A (en) * | 2011-07-20 | 2013-01-23 | 贵州航天电器股份有限公司 | Filtering electric connector contact |
| CN206211086U (en) * | 2016-11-29 | 2017-05-31 | 中国电子科技集团公司第四十研究所 | Chain connection π type filtering contact pin components |
-
2016
- 2016-11-29 CN CN201611071592.1A patent/CN106410468A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599599A (en) * | 2008-06-02 | 2009-12-09 | 中航光电科技股份有限公司 | A kind of π type filtering electrical connector and π type filtering member thereof |
| EP2529790A1 (en) * | 2011-06-03 | 2012-12-05 | Greatbatch Ltd. | Feedthrough wire connector for use in a medical device |
| CN102891381A (en) * | 2011-07-20 | 2013-01-23 | 贵州航天电器股份有限公司 | Filtering electric connector contact |
| CN206211086U (en) * | 2016-11-29 | 2017-05-31 | 中国电子科技集团公司第四十研究所 | Chain connection π type filtering contact pin components |
Non-Patent Citations (1)
| Title |
|---|
| 肖颖等: ""QMZ型滤波电连接器的滤波结构设计"", 《机电元件》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113612462A (en) * | 2021-07-21 | 2021-11-05 | 杭州电子科技大学 | Full-adjustable band-pass filter based on tubular filter structure |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20170215 |