CN103354316A - Tuner isolation input socket - Google Patents
Tuner isolation input socket Download PDFInfo
- Publication number
- CN103354316A CN103354316A CN2012104092249A CN201210409224A CN103354316A CN 103354316 A CN103354316 A CN 103354316A CN 2012104092249 A CN2012104092249 A CN 2012104092249A CN 201210409224 A CN201210409224 A CN 201210409224A CN 103354316 A CN103354316 A CN 103354316A
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- radio frequency
- circuit board
- input socket
- frequency input
- ring pad
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Abstract
The invention relates to an electronic component, and more specifically relates to a radio frequency input socket which can be used to block direct-current signals and low-frequency signals and make radio frequency signals pass through. The tuner isolation input socket is characterized in that the radio frequency input socket is fixed on a main circuit board, the ground plane of the radio frequency input socket and the ground plane of the main circuit board are provided with a capacitor therebetween; or the radio frequency input socket is fixed on a circuit board, the circuit board is provided with wire routing and a capacitor, a shielding case is fixed on the circuit board at the same time, and the ground plane of the radio frequency socket is connected with the shielding case through the wire routing and the capacitor on the circuit board. The tuner isolation input socket provided by the invention has the advantages of low cost, good high-frequency performance, complete shielding and simple assembly process, and solves the technical problem that an existing radio frequency input socket in the prior art is complex in structure and assembly process, high in required accuracy, low in production efficiency and high in cost.
Description
Technical field
The present invention relates to electronic component, more particularly, is a kind of the have direct current of obstruct and low frequency signal, by the radio frequency input socket of radiofrequency signal.
Background technology
Cable TV network links together set-top box or the television set of every household by cable, between each user, between user and the CATV transmission equipment, may exist earthy inconsistent, can in cable, produce earth-return circulation, cause electric cable heating, device damage may cause fire when serious.
Use radiofrequency signal earth-return isolator, can cut off the grounded circuit electric current, Accident prevention occurs.This type of isolator is usually realized by 2 coaxial connectors and several electric capacity, is connected by electric capacity between the ground of two coaxial connectors.Hundreds of electric capacity to thousands of pF are Low ESR to the 48MHz-950MHz cable TV signal, but to direct current and low frequency, especially the signal of 50Hz or 60Hz is high impedance, prevents that the AC network potential difference from producing the earth-return electric current in Transforming of Wire TV Cable.
In existing patent document, have: Chinese patent: " a kind of digital TV set-top box with isolation features (CN202340290U) ", it comprises the RGA socket that is connected with television set and the F head that is connected with coaxial network, the shielding that is input to TV signal on the F head and pairing thereof from coaxial network is connected with respectively capacitor C 3, C4 on the ground, is connected with respectively capacitor C l, C2 on the ground in the shielding of the signal of exporting to TV and pairing thereof.Use the 8-10uF large bulk capacitance, high frequency performance is not good, and if need the above voltage of anti-500V, capacitor size will be very large, high expensive.ZL200920135422.4 uses annular capacitor, and structure is still aobvious complicated, and cost is still higher.
Summary of the invention
The invention provides the present invention and be to provide that a kind of cost is low, high frequency performance good, full-shield, the simple tuner Isolation input of assembly process socket; Solved the complex structure that the radio frequency input socket ground that exists in the prior art and equipment join, assembly process is complicated, and permissible accuracy is high, and production efficiency is low, the technical problem of high expensive.
Above-mentioned technical problem of the present invention solves by following technical proposals: a kind of tuner Isolation input socket, and it is characterized in that: the radio frequency input socket is fixed on the main circuit board, is provided with electric capacity between the ground of radio frequency input socket and the ground level on the main circuit board; Perhaps the radio frequency input socket is fixed on the circuit board, and circuit board is provided with cabling and electric capacity, is fixed with simultaneously shielding case on the circuit board, and the ground of radio frequency socket is connected with shielding case with electric capacity by the cabling on the circuit board.Tuner generally comprises CAN type tuner and present widely used silicon tuner etc.Television set or set-top box are generally used the CAN tuner, are whole high-frequency tuning partial circuit is encapsulated in the metal shielding, and the direct connection of radio frequency input socket and metal shielding becomes as a whole., can not directly be connected between radio frequency input socket and the metal shielding, and need the radio frequency input socket is fixed on the shielding case through a circuit board again in order to realize input isolation in the present invention, between radio frequency input socket ground and the shielding case by several capacitive coupling.By capacitive coupling, can pass through radiofrequency signal, but intercept the 50-60Hz power network current, play the earth-return buffer action.Need the place of radio frequency isolation input for silicon tuner and other, radio frequency socket is not to be fixed on the shielding case, but directly be welded on the main circuit board, then the isolation of radio frequency socket is more simplified, and only needs radio frequency socket and main circuit board interplanar are got final product by capacitive coupling.The installation of radio frequency input socket and circuit board can be adopted the mode of pin and jack, also can adopt surface-pasted mode.Buffer circuit is combined with the radio frequency input socket, not directly to be connected between radio frequency input socket ground and the equipment ground, but connect by the electric capacity of thousands of pF, just can play the effect of isolation electrical network low-frequency ac, and do not need independent external isolator, reduced cost, reduced volume, assembly process is simple.
Circuit board can be individual layer also can be double-deck.As preferably, described circuit board is double-deck, the outer ring pad is connected with the top-level metallic coating, the inner ring pad is connected with the underlying metal coating, inner ring pad and outer ring pad are double-deck pad and levels is communicated with, the through hole of outer ring pad and the pin on the shielding case join, and the pin on the through hole of inner ring pad and the radio frequency input socket joins, and shielding case is that face contacts with metal coating; Be provided with the element position at the bottom circuit board, in the element position high pressure patch capacitor be installed, electric capacity is connected the outer ring pad with the inner ring pad.The double-layered circuit board welding is more firm, and cabling is more convenient, and shield effectiveness is better.Electric capacity namely links to each other with the ground of radio frequency input socket inside and outside pad connection with shielding case, realized capacitive coupling.The insulation distance of upper strata metal coating and inner ring pad, the insulation distance of lower metal coating and outer ring pad can be adjusted according to the isolation requirement of withstand voltage.Metal coating can be to cover copper or cover aluminium or gold-plated, realizes contacting with the face of shielding case.
As preferably, described high pressure patch capacitor is withstand voltage greater than 500V, and capacitance is 470pF ~ 3300pF.Adopt the high pressure patch capacitor, reduced cost, use a plurality of patch capacitors, be distributed in around the input socket, to improve high frequency performance.
As preferably, the number of described outer ring pad and inner ring pad is identical to be distributed on the circuit board, outer ring pad and inner ring pad all have 4 ~ 6, and the quantity of electric capacity is identical with the quantity of inner ring pad, and the radio frequency input socket is identical with number of pads with number of pins on the shielding case.
Outer ring pad and inner ring pad all are uniform as the center of circle take the center of circuit board, and the outer ring pad can align with the inner ring pad, and the angle that also can stagger is conducive to take full advantage of the space, reduces board area.The number of pin can 1-3, has realized the connected sum basic function, just can obtain qualified high frequency performance but adopt pin more than 4 to install.Adopt more pins to assemble to make being connected more near totally enclosed coaxial connected mode between radio frequency socket and the shielding case, can obtain better high frequency performance and shielding properties.
Being connected and fixed between circuit board and the shielding case, except above-mentioned with pin the fixing mode of welding circuit board, also can use the methods such as crimping, riveted joint, as long as satisfy firm in structure and electrically contact well.Be electrically connected the multiple spot UNICOM that should try one's best, perhaps face contacts, and is evenly distributed on around the radio frequency socket, with the high frequency performance that obtains.As preferably, the pin of described radio frequency input socket is connected by welding manner with through hole, and the pin of shielding case also is connected by welding manner with through hole, and the pin of radio frequency input socket is and is distributed in around the radio frequency input socket.Simple in structure, be connected firmly.
As preferably, be provided with pad, element position and metal coating at main circuit board, the quantity of pad is identical with the quantity of element position, be 4 ~ 6, weld electric capacity in the element position, the pin of radio frequency input socket is welded in the pad, passes through capacitive coupling between pad and the main circuit board ground level.Directly is not connected between pad and the main circuit board ground level, but passes through capacitive coupling, realized that radio frequency inputs the earth-return low frequency isolation.Select different mounting structures according to different tuners.The number of pin is identical with the use of the CAN tuner of front, can select 1-3 pin, realizes the connected sum basic function, but adopts 4 above better effects if.The quantity of electric capacity is identical with number of pads.And in the selection of electric capacity, can with thousands of pF large bulk capacitances and tens of to hundreds of pF low capacity capacitor combinations uses, take into account LF-response and high frequency response.
The radio frequency input socket can also be made 90 ° of forms, and the base portion of radio frequency input socket is parallel with main circuit board, and its vertical coupling part joins by the pad of pin and main circuit board.
Radio frequency input socket earth-return low frequency isolation mode of the present invention, all take PAL9.5 type TV socket as example, also can be changed to F head connector socket or other radio frequency connectors to this socket, only need to make the pin that is fit to the circuit board installation at this connector one end and get final product.Also can be without pin, and adopt screw and nut and circuit board to fix, but cost can omit height, and efficiency of assembling can hang down.
Therefore, tuner Isolation input socket of the present invention possesses following advantage: simple in structure, cost is low, and high frequency performance is good, and the high frequency low frequency is taken into account, full-shield, and assembly process is simple.
Description of drawings
Fig. 1 is the profile after radio frequency input socket, shielding case, the circuit board installation.
Fig. 2 is the radio frequency input socket of a pin of installing with 4 suitable circuit boards.
Fig. 3 is the part of the shielding case of a pin of installing with 4 suitable circuit boards.
Fig. 4 is the top layer Copper Foil pattern of circuit board 3.
Fig. 5 is the bottom Copper Foil pattern of circuit board 3.
Fig. 6 is the stagger circuit board bottom Copper Foil pattern of the embodiment that 45 degree install of radio frequency input socket and shielding case.
Fig. 7 is the radio frequency input socket of a pin of installing with 6 suitable circuit boards.
Fig. 8 is the part of the shielding case of a pin of installing with 6 suitable circuit boards.
Fig. 9 is that the radio frequency input socket is directly installed on the profile on the main circuit board.
Figure 10 is that the radio frequency input socket is directly installed on the main circuit board time isolation circuit part circuit board Copper Foil pattern.
Figure 11 is that a kind of circuit board of 90 degree forms is installed radio frequency socket.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical scheme of inventing is described in further detail.
Embodiment 1:
As shown in Figure 1, a kind of tuner Isolation input socket is applied in the CAN tuner that TV or set-top box are generally used.Comprise radio frequency input socket 1, the pad on radio frequency input socket 1 passes through pin 20 and circuit board is connected connects, and is connected with simultaneously shielding case 2 on circuit board 3.As shown in Figure 2, radio frequency input socket 1 comprises a columniform base 22, base 22 be connected with core pin 23 take the center as the center of circle equally distributed four radio frequency input socket pins 20, core pin 23 is plugged in the through hole 24 at circuit board 3 centers.As shown in Figure 3, there is a manhole at the center of shielding case 2, is evenly equipped with four shielding case pins 21 below shielding case 2.Radio frequency input socket pin 20 and shielding case pin 21 are welded in the through hole of circuit board.
Shown in Figure 4 and 5, circuit board 3 comprises two-layer up and down, cabling and electric capacity is arranged on the circuit board 3, and cover copper at the vacant area of circuit board 3, to improve shield effectiveness and high frequency performance.Through hole 24 take the center on circuit board 3 is provided with two lap welding dishes as the center of circle, be respectively outer ring pad 4,5,6,7 and inner ring pad 8,9,10,11, outer ring pad 4,5,6,7 and inner ring pad 8,9,10,11 be double-deck pad namely levels be communicated with. Outer ring pad 4,5,6,7 and 4 shielding case pins 21 welding of shielding case 2,4 radio frequency input socket pins 20 of pad 8-11 and radio frequency input socket 1 weld.Top layer covers copper 12 and is connected with outer ring pad 4,5,6,7, and bottom covers copper 13 and is connected with inner ring pad 8,9,10,11.At bottom element position 14,15,16,17 is arranged, be used for installing electric capacity, be generally the high pressure patch capacitor, withstand voltage greater than 500V, capacitance is usually at 470pF to 3300pF.As seen from Figure 5, electric capacity is connected outer ring pad 4-7 with inner ring pad 8,9,10,11, and the ground that also is about to radio frequency socket 1 is connected with shielding case 2, realizes capacitive coupling, can pass through radiofrequency signal, but intercepts the 50-60Hz power network current, plays the earth-return buffer action.Top layer covers that copper 12 and inner ring pad 8,9,10,11 insulation distance, bottom cover copper 13 and outer ring pad 4,5,6,7 insulation distance can be according to the adjustment of isolation requirement of withstand voltage.In the present embodiment, insulation distance is got 0.5mm, can satisfy direct current 500V requirement of withstand voltage.
Embodiment 2:
As shown in Figure 6, as different from Example 1, outer ring pad 4,5,6,7 and inner ring pad 8,9,10, the 11 45 ° of layouts that staggered, all the other are identical with embodiment 1.
Embodiment 3:
Shown in Fig. 7 and 8, as different from Example 1, the pin 20 of radio frequency input socket has 6, same, the pin 21 of shielding case also has 6, at circuit board minute other inner ring pad 8,9,10,11 and outer ring pad 4,5,6,7, also have element position 14,15,16,17 all to have 6, corresponding coupling capacitance also is increased to 6.Adopt more pins to assemble to make being connected more near totally enclosed coaxial link mode between radio frequency socket and the shielding case, can obtain better high frequency performance and shielding properties.
Embodiment 5:
As shown in Figure 9, for widely used silicon tuner gradually, and other need the place of radio frequency isolation input, radio frequency input socket 1 is not to be fixed on the shielding case 2, but directly be welded on the main circuit board 18, then the isolation of radio frequency input socket 1 is more simplified, and only needs radio frequency input socket 1 and 19 of main circuit board ground levels are got final product by capacitive coupling.Radio frequency input socket 1 is directly installed on the main circuit board 18.As shown in figure 10, at main circuit board 18 pad 25,26,27,28 is arranged, be used for installing the pin 20 of radio frequency input socket, pad 25,26,27,28 with main circuit board ground level 19 between directly be not connected, but by electric capacity 29,30,31,32 couplings, realized radio frequency input earth-return low frequency isolation.
Embodiment 6:
As shown in figure 11, as different from Example 5, radio frequency input socket 1 is 90 ° of forms, and radio frequency input socket base portion is parallel with main circuit, the radio frequency input socket by with the vertical coupling part of base on pin be installed be connected with main circuit board.The isolation coupled modes are identical with embodiment 5 between radio frequency input socket and main circuit board 18 ground levels.
Aforementioned various radio frequency socket earth-return low frequency isolation mode all take PAL9.5 type TV socket as example, also can be changed to F head connector socket or other radio frequency connectors to this socket, only needs to make the pin that is fit to the circuit board installation at this connector one end and gets final product.Also can be without pin, and adopt screw and nut and circuit board to fix, but cost can omit height, and efficiency of assembling can hang down.
The radio frequency socket base has other shapes such as square take circle as example among aforementioned each embodiment in the reality, and rectangle etc. are the high frequency performance that obtains, and also should adopt a plurality of pins, roughly is arranged in equably base end face outer.
Among aforementioned each embodiment, radio frequency socket and circuit board be connected and fixed the mode that has adopted pin and through hole, also can adopt surface-pasted radio frequency socket in the reality.
Claims (6)
1. tuner Isolation input socket, it is characterized in that: the radio frequency input socket is fixed on the main circuit board, is provided with electric capacity between the ground of radio frequency input socket and the ground level on the main circuit board; Perhaps the radio frequency input socket is fixed on the circuit board, and circuit board is provided with cabling and electric capacity, is fixed with simultaneously shielding case on the circuit board, and the ground of radio frequency socket is connected with shielding case with electric capacity by the cabling on the circuit board.
2. tuner Isolation input socket according to claim 1, it is characterized in that: described circuit board is for double-deck, the outer ring pad is connected with the top-level metallic coating, the inner ring pad is connected with the underlying metal coating, inner ring pad and outer ring pad are double-deck pad and levels is communicated with, the through hole of outer ring pad and the pin on the shielding case join, and the pin on the through hole of inner ring pad and the radio frequency input socket joins, and shielding case is that face contacts with metal coating; Be provided with the element position at the bottom circuit board, in the element position high pressure patch capacitor be installed, electric capacity is connected the outer ring pad with the inner ring pad.
3. tuner Isolation input socket according to claim 2, it is characterized in that: described high pressure patch capacitor is withstand voltage greater than 500V, and capacitance is 470pF ~ 3300pF.
4. tuner Isolation input socket according to claim 2, it is characterized in that: identical being distributed on the circuit board of number of described outer ring pad and inner ring pad, outer ring pad and inner ring pad all have 4 ~ 6, the quantity of electric capacity is identical with the quantity of inner ring pad, and the radio frequency input socket is identical with number of pads with number of pins on the shielding case.
5. according to claim 2 to 4 described tuner Isolation input sockets, it is characterized in that: the pin of described radio frequency input socket is connected by welding manner with through hole, the pin of shielding case also is connected by welding manner with through hole, and the pin of radio frequency input socket is and is distributed in around the radio frequency input socket.
6. tuner Isolation input socket according to claim 1, it is characterized in that: be provided with pad, element position and metal coating at main circuit board, the quantity of pad is identical with the quantity of element position, be 4 ~ 6, in the element position, weld electric capacity, the pin of radio frequency input socket is welded in the pad, passes through capacitive coupling between pad and the main circuit board ground level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210409224.9A CN103354316B (en) | 2012-10-24 | 2012-10-24 | Tuner isolation input socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210409224.9A CN103354316B (en) | 2012-10-24 | 2012-10-24 | Tuner isolation input socket |
Publications (2)
| Publication Number | Publication Date |
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| CN103354316A true CN103354316A (en) | 2013-10-16 |
| CN103354316B CN103354316B (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210409224.9A Expired - Fee Related CN103354316B (en) | 2012-10-24 | 2012-10-24 | Tuner isolation input socket |
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| CN (1) | CN103354316B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633991A (en) * | 2013-11-20 | 2014-03-12 | 四川九州电子科技股份有限公司 | Circuit for performing direct current voltage insulation and isolation on wired network antenna coaxial socket |
| CN104269675A (en) * | 2014-09-05 | 2015-01-07 | 江苏东升电子科技有限公司 | Connector female base |
| WO2015101140A1 (en) * | 2013-12-31 | 2015-07-09 | 安徽省大富机电技术有限公司 | Radio-frequency connector and radio-frequency communication device |
| CN107221820A (en) * | 2017-06-29 | 2017-09-29 | 深圳市深台帏翔电子有限公司 | terminal device and its integrated connector |
| CN110011005A (en) * | 2019-05-10 | 2019-07-12 | 常州仁千电气科技股份有限公司 | A kind of miniaturization function applied to circular polarized antenna divides phase shifter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN87212600U (en) * | 1987-12-19 | 1988-11-30 | 张锡富 | Insulation resinfree sealed tv antenna adapter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2413407Y (en) * | 1999-12-08 | 2001-01-03 | 杨继深 | Noninductive isolated interference filter connector |
| CN101728723A (en) * | 2008-10-14 | 2010-06-09 | 江苏银河电子股份有限公司 | Cable television anti-interference isolator |
| CN101950891A (en) * | 2010-08-25 | 2011-01-19 | 贵州航天电器股份有限公司 | Elastic contact pin filter connector socket |
| CN203119234U (en) * | 2012-10-24 | 2013-08-07 | 杭州祺来电子有限公司 | Turner socket |
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- 2012-10-24 CN CN201210409224.9A patent/CN103354316B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87212600U (en) * | 1987-12-19 | 1988-11-30 | 张锡富 | Insulation resinfree sealed tv antenna adapter |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633991A (en) * | 2013-11-20 | 2014-03-12 | 四川九州电子科技股份有限公司 | Circuit for performing direct current voltage insulation and isolation on wired network antenna coaxial socket |
| CN103633991B (en) * | 2013-11-20 | 2016-09-28 | 四川九州电子科技股份有限公司 | Cable network antenna coaxial socket is carried out the circuit of direct current voltage insulation isolation |
| WO2015101140A1 (en) * | 2013-12-31 | 2015-07-09 | 安徽省大富机电技术有限公司 | Radio-frequency connector and radio-frequency communication device |
| CN104269675A (en) * | 2014-09-05 | 2015-01-07 | 江苏东升电子科技有限公司 | Connector female base |
| CN104269675B (en) * | 2014-09-05 | 2017-09-08 | 江苏东升电子科技有限公司 | A kind of connector female seat |
| CN107221820A (en) * | 2017-06-29 | 2017-09-29 | 深圳市深台帏翔电子有限公司 | terminal device and its integrated connector |
| CN107221820B (en) * | 2017-06-29 | 2024-02-27 | 深圳市深台帏翔电子有限公司 | Terminal equipment and integrated connector thereof |
| CN110011005A (en) * | 2019-05-10 | 2019-07-12 | 常州仁千电气科技股份有限公司 | A kind of miniaturization function applied to circular polarized antenna divides phase shifter |
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| CN103354316B (en) | 2016-01-27 |
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