CN206211086U - Chain connection π type filtering contact pin components - Google Patents
Chain connection π type filtering contact pin components Download PDFInfo
- Publication number
- CN206211086U CN206211086U CN201621292714.5U CN201621292714U CN206211086U CN 206211086 U CN206211086 U CN 206211086U CN 201621292714 U CN201621292714 U CN 201621292714U CN 206211086 U CN206211086 U CN 206211086U
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- CN
- China
- Prior art keywords
- contact pin
- ferrite
- ceramic condenser
- adapter sleeve
- 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.)
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Abstract
The utility model gives a kind of chain connection π types filtering contact pin component, including contact pin and wiring pin, and contact pin tail end is connected with wiring pin；Also include some ferrite tubes, some ceramic condenser pipes and at least one adapter sleeve, the ferrite tube and the ceramic condenser pipe are one-to-one corresponding, some ferrite tubes are sleeved on contact pin outside successively, the ceramic condenser pipe sleeve is mounted in corresponding ferrite tube outside, the adapter sleeve is equally sleeved on contact pin outside, and each adapter sleeve is between two ferrite tubes of arbitrary neighborhood and corresponding two neighboring ceramic condenser pipe.Compared with existing low pass single-unit π types filtering pin layout, two pitch chains connection π types filter the application of contact pin so that product has obtained obvious improvement in the decay indices of low-frequency range, substantially increases the antijamming capability of product.
Description
Technical field
The utility model is related to the contact pin component that a kind of filter connector is used, and more particularly to a kind of chain connection π type filtering is inserted
Needle assemblies.
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 types.As schemed
Shown in 1, single-unit π types filter contact pin by contact pin 11a, coaxial ferrite tube 13a, coaxial ceramic condenser pipe 14a and wiring pin 12a etc.
Part is constituted.Wherein ferrite tube 13a plays inductor in filter connector, and " π " type is constituted with ceramic condenser pipe 14a
Tubulose wave filter；As shown in Fig. 2 being a kind of electric by input by the single-unit π type filter circuits that single-unit π types filtering contact pin is constituted
Hold, (R is resistance to three low-pass filter circuits of elements composition of inductance and output capacitance, L is inductance, C is electric capacity, U1 is to be input into
Voltage, U2 are output voltage).
After by the single-unit π types filtering integrated loading connector of contact pin of prior art, its attenuation requirement is minimum in 10MHz to decline
It is kept to 15dB (measured value is 20dB), minimum attenuation is 50dB during 100MHz (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
Minimum attenuation is 50dB when 15dB, 100MHz.But it is directed in some equipment and new requirement is proposed in R＆D process, it is minimum
Decay indices rise to：It is 40dB in 10MHz, is 90dB in 100MHz, but cut-off frequency should meet the rule of GJB1308
It is fixed, it is seen that the low-pass wave filtering connector researched and developed before cannot meet new anti-interference requirement.
Utility model content
Technical problem to be solved in the utility model is to provide the cutoff frequency of a kind of cut-off frequency and single-unit pi type filter
Rate is identical, meet the chain connection π type filtering contact pin components of attenuation requirement.
In order to solve the above technical problems, the utility model provides a kind of chain connection π types filtering contact pin component, including contact pin and
Wiring pin, contact pin tail end is connected with wiring pin；
Also include some ferrite tubes, some ceramic condenser pipes and at least one adapter sleeve, the ferrite tube and described
To correspond, some ferrite tubes are sleeved on contact pin outside to ceramic condenser pipe successively, and the ceramic condenser pipe sleeve is mounted in correspondence
Ferrite tube outside, the adapter sleeve be equally sleeved on contact pin outside, each adapter sleeve be in two ferrites of arbitrary neighborhood
Between pipe and corresponding two neighboring ceramic condenser pipe.
After using such structure, compared with existing low pass single-unit π types filtering pin layout, the connection π type filtering of two pitch chains
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.
Understand technology contents of the present utility model in order to clearer, below by this chain connection π type filtering contact pin component referred to as
For this contact pin component.
This contact pin component includes two ferrite tubes, two ceramic condenser pipes and an adapter sleeves, 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 optimal
The implementation method of change.
The adapter sleeve of this contact pin component includes that inner side intercepts the first spacer ring portion and the outside obstruct of 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 can not only intercept adjacent
Two ferrite tubes and two neighboring ceramic condenser pipe, and the width difference in the width in the first spacer ring portion and the second spacer ring portion can
To produce staggered floor, and then by ferrite tube and the position of ceramic condenser pipe limitation adapter sleeve, the probability that reduction comes off.
Brief description of the drawings
Fig. 1 is the structural representation that prior art single-unit π types filter contact pin.
Fig. 2 is the π type filter circuit schematic diagrams that prior art single-unit π types filter 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 attenuations 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 tubes 13 of adapter sleeve and two ceramic condenser pipes
14。
The tail end of contact pin 11 is welded and fixed with wiring pin 12, and wiring pin 12 is used to be fixed with outer lead.
Two ferrite tubes 13 and two ceramic condenser pipes 14 are one-to-one relationship, and two ferrite tubes 13 are sleeved on successively
The outside of contact pin 11, two ceramic condenser pipes 14 are sleeved on the outside of 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 two the first spacer ring portion 15a of ferrite tube 13, and the second spacer ring portion 15b intercepts two ceramics
Capacitance tube 14, the first spacer ring portion 15a is more than the second spacer ring portion 15b in the axial direction of contact pin 11 in the width of the axial direction of contact pin 11
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 on filter cutoff frequency and pad value
Computing formula, calculated come the size to capacitance：
Fc=1/ π RC (1)
β=arcch [2 (f/fc) 2-1]
=8.7ln [4 (f/fc) 2-2] (2)
In formula：(f is 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 indicator of contract requirement is substituted into formula (2), can be obtained：
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 electric signal by with cut
Critical point only, cut-off frequency only has more than certain numerical value, allows useful signal to pass through, and just can guarantee that 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 the product)；
The position of minimum capacitance for choosing single-unit π type filtering tubes is 8000pF, for the filter circuit that two assistant wardens join：
Series arm impedance Z 1=2j ω L；
Parallel arm impedance Z 2=-j/2 ω C；
In formulaIt is the angular frequency of low pass filter.
According to formula：
Formula (3) is substituted into formula (4), can be obtained：
β=arcch [8 (f/fc) 2-1]
=8.7ln [16 (f/fc) 2-2] (5)
Formula (5) is compared with formula (2) and is understood, two pitch chains join the cut-off frequency of pi type filter and cutting for single-unit pi type filter
Only frequency is identical, but decay has obvious change, and (1 is single-unit pi type filter in Fig. 6, and 2 is two assistant wardens as a result to refer to Fig. 6
Connection pi type filter, 3 is that three assistant wardens join pi type filter).
It is according to the algorithm value that formula (4.5) calculates each frequency：
As f=1M, β=35dB ＞ 4dB；
As f=10M, β=76dB ＞ 40dB；
As f=100M, β=116dB ＞ 90dB
Calculated more than as can be seen that the filter element of filtering contact pin can be expired using two pitch chains connection π types low pass filter
Sufficient attenuation requirement.
According to above-mentioned calculating and result of the test, the structure design by the filtering contact pin is：In the appearance surface cover of metal ferrule
Upper two coaxial ferrite tubes, ferrite tube plays inductor in filter connector.In the appearance surface cover of ferrite tube
Upper two coaxial ceramic condenser pipes, ceramic condenser pipe and ferrite tube composition " π " type tubulose wave filter." π " type low pass is saved two
Metal sleeve is designed between wave filter, its effect is π types low pass filter is contacted reliability, stable performance.This tubulose
Filter element just constitutes filtering contact pin together with common contact pin
The product filtering performance is tested according to new research and development requirement, filtering performance is shown in Table 1, decays at 25 DEG C
Test curve (relation curve of minimum attenuation and frequency) is shown in Fig. 7.
The filtering performance of table 1
The analysis more than is as can be seen that join the integrated loading connector of filtering contact pin of π type low pass filters using two pitch chains
Afterwards, various functions such as shielding, ground connection and filtering are realized, the use requirement of whole machine is met.
Above-described is only a kind of implementation method of the present utility model, it is noted that for the ordinary skill of this area
For personnel, on the premise of the utility model principle is not departed from, some variations and modifications can also be made, these also should be regarded as
Belong to protection domain of the present utility model.
Claims (3)
1. a kind of chain connection π types filter contact pin component, including contact pin and wiring pin, and contact pin tail end is connected with wiring pin；
It is characterized by：
Also include some ferrite tubes, some ceramic condenser pipes and at least one adapter sleeve, the ferrite tube and the ceramics
To correspond, some ferrite tubes are sleeved on contact pin outside to capacitance tube successively, and the ceramic condenser pipe sleeve is mounted in corresponding iron
Oxysome pipe outside, the adapter sleeve be equally sleeved on contact pin outside, each adapter sleeve be in two ferrite tubes of arbitrary neighborhood and
Between corresponding two neighboring ceramic condenser pipe.
2. chain connection π types according to claim 1 filter contact pin component, it is characterized in that：
Including two ferrite tubes, two ceramic condenser pipes and an adapter sleeve, adapter sleeve is in two ferrite tubes and two
Between ceramic condenser pipe.
3. chain connection π types according to claim 1 filter contact pin component, it is characterized in that：
The adapter sleeve includes that inner side intercepts the two neighboring ceramics of the first spacer ring portion and outside obstruct of 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 |
|---|---|---|---|
| CN201621292714.5U CN206211086U (en) | 2016-11-29 | 2016-11-29 | Chain connection π type filtering contact pin components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621292714.5U CN206211086U (en) | 2016-11-29 | 2016-11-29 | Chain connection π type filtering contact pin components |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206211086U true CN206211086U (en) | 2017-05-31 |
Family
ID=58750794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621292714.5U Expired - Fee Related CN206211086U (en) | 2016-11-29 | 2016-11-29 | Chain connection π type filtering contact pin components |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206211086U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410468A (en) * | 2016-11-29 | 2017-02-15 | 中国电子科技集团公司第四十研究所 | Chain pi-type filter pin assembly |
-
2016
- 2016-11-29 CN CN201621292714.5U patent/CN206211086U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410468A (en) * | 2016-11-29 | 2017-02-15 | 中国电子科技集团公司第四十研究所 | Chain pi-type filter pin assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20191129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |