CN102496430A - Television signal transmission terminal load - Google Patents
Television signal transmission terminal load Download PDFInfo
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- CN102496430A CN102496430A CN2011103852029A CN201110385202A CN102496430A CN 102496430 A CN102496430 A CN 102496430A CN 2011103852029 A CN2011103852029 A CN 2011103852029A CN 201110385202 A CN201110385202 A CN 201110385202A CN 102496430 A CN102496430 A CN 102496430A
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- signal transmission
- resistance
- load
- transmission terminal
- television signal
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Abstract
The invention relates to a television signal transmission device, and relates to a television signal transmission terminal load. Existing television signal transmission terminal loads are formed by short and thin resistance wires, and inversed standing waves up to -12 to 8dB are still produced in actual application. The television signal transmission terminal load is provided aiming at the problem. A technical scheme provided by the invention is that the television signal transmission terminal load comprises an inner conductor formed by a contact pin, an insulation sealing sleeve sleeved on the peripheral of the inner conductor, a load resistor with one end welded on a rear end of the inner conductor pin, and a connection sleeve sleeved on the peripheral of the insulation sealing sleeve. The television signal transmission terminal load is characterized in that: the load resistor is formed by a resistance wire with a resistance value of 75ohm helically wound on an insulating column; and the material of the insulation sealing sleeve is polycarbonate. An outer diameter d of the 75ohm resistance wire of the load resistor is no smaller than 0.3mm and no larger than 1.2mm. The length L of the resistance wire is increased to a corresponding length with a direct proportion to the selected outer diameter d. As a result of trials, the intensity of the inversed standing wave is greatly reduced from a range of -12 to 8dB to a range of -28 to -24dB. Television signal transmission quality is substantially improved.
Description
Technical field
The present invention relates to a kind of TV signal transmission and use device, the load of particularly a kind of TV signal transmission terminal.
Background technology
According to the rule of high-frequency signal transmission, the transmission line two ends of open circuit are not because there is the load meeting to demonstrate high impedance.The transmission of TV signal is suitable for such rule equally; When the client terminal of TV signal transmission does not insert the user; TV signal forms standing wave being sent to the vacant line end back end that can rebound, and return standing wave can overlap with normal signal, has disturbed normal TV signal to transmit.Therefore, the vacant terminal of TV signal transmission line must the adjunction terminate load.
The TV signal transmission terminal load of existing similar purposes, all adopt 75 ohm of resistance values, the line external diameter is equal to or less than 0.3 millimeter resistance wire helical form and is surrounded on the load resistance that insulated column constitutes, because used resistance wire external diameter is thin; Be that its sectional area is little, according to resistance formula R=ρ L/S, under the prerequisite that guarantees 75 ohm of resistance values; The material that resistance wire adopts is constant; Be electricalresistivity when constant, its length L also must keep constant with sectional area S's than L/S=R/ ρ, and used resistance wire external diameter is thin; Be that its sectional area S is little, the also necessary corresponding shortening of length L; Used resistance wire external diameter is thick, and promptly its sectional area S is big, the also necessary corresponding lengthening of length L, sectional area S and length L relation in direct ratio.
The load resistance of the TV signal transmission terminal load of existing similar purposes, its resistive conductor external diameter is equal to or less than 0.3 millimeter, and length is also corresponding shorter, only can helical form be surrounded on insulated column 3 circles.The load resistance that this not only thin but also short resistance wire constitutes still can produce the return standing wave up to-10 ± 2dB in actual use, and the normal transmission of TV signal is caused bigger influence with using.Secondly; The lightest density is the polypropylene formation of 0.90g/cm3～0.91g/cm3 in the insulated enclosure cover employing plastics of the TV signal transmission terminal load of existing similar purposes; Low-density polypropylene insulation sealing shroud has reduced the insulation degree, is difficult to further reduce the intensity of return standing wave.
This shows, study and design a kind of resistance wire external diameter and length, improve the density of material that insulated enclosure overlaps, thereby the TV signal transmission terminal load that reduces return intensity of standing wave greatly is necessary through the increasing load resistance.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; Research also designs a kind of density of material that overlaps through resistance wire external diameter and length, the raising insulated enclosure of increasing load resistance, thereby reduces the TV signal transmission terminal load of return intensity of standing wave greatly.
The objective of the invention is to realize like this: the load of a kind of TV signal transmission terminal; Comprise the inner wire that contact pin constitutes; Be socketed on the insulated enclosure cover of inner wire contact pin afterbody periphery, an end wire bonds is socketed on the cover in succession of insulated enclosure cover periphery in the load resistance of inner wire contact pin tail end; It is characterized in that described load resistance is that the resistance wire helical form of 75 ohm of resistance values is surrounded on the resistance that insulated column constitutes, the manufacturing materials of described insulated enclosure cover is a Merlon.
Merlon density is 1.18g/cm3～1.20g/cm3, is that the polypropylene of 0.90g/cm3～0.91g/cm3 is compared with density, and density has increased by 31.1～31.8%, and its electrical insulating property performance obviously improves.
The object of the invention can also be with taking following further technical measures to realize:
The resistance wire outside diameter d of the load resistance that said resistance value is 75 ohm is 0.3 millimeter≤d≤1.2 millimeter, and the length L of resistance wire is lengthened to and selectes the directly proportional respective length of outside diameter d.According to resistance formula R=ρ L/S, L=SR/ ρ, in the formula, R must equal 75 ohm, and after the manufacturing materials of resistance wire was confirmed, its electricalresistivity confirmed that also R/ ρ is a constant.For example, d is chosen to be 1.0 millimeters, and also corresponding being lengthened to of L can helical form be surrounded on insulated column 4 circles.
Described load resistance one end lead becomes the contact pin of inner wire, and the bend apical grafting behind crooked 180 degree of other end lead is in the intracavity bottom that overlaps in succession.The technique effect that this load resistance one end lead becomes the contact pin design of inner wire is: the welding sequence of having cancelled existing TV signal transmission terminal load factor resistance and inner wire; Both saved processing cost, reduced the signal transmission attenuation of TV signal transmission course again by way of weld; Bend apical grafting behind crooked 180 degree of other end lead in the technique effect of the intracavity bottom design of cover in succession is: constitute TV signal transmission loop, reach the effect in load resistance incoming television signal transmission loop.
The described leading section inner chamber that overlaps in succession is designed with to connect and uses screw thread; The described periphery of overlapping in succession is designed with the fastening hexagon annular projection of using; Describedly overlap the cup cover shape that rearward end is designed to hold load resistance in succession.Overlap in succession inner chamber be designed with connect with screw thread in case with transmission cable radio frequency (RF) coaxial connector periphery screw thread each other realization be threaded; It is to use when being threaded fastened tools such as spanner to provide convenience that periphery is designed with fastening use hexagon annular projection; Overlap the cup cover shape that rearward end is designed to hold load resistance in succession, both saved and made in succession that the consumptive material of cover reduces cost, beautified the outward appearance of cover in succession again.
The TV signal transmission terminal load that the present invention's enforcement obtains has shown following beneficial effect through trying out:
Compare with the TV signal transmission terminal load of existing similar purposes; The resistance wire external diameter overstriking of load resistance of the present invention and length lengthening; The manufacturing materials of insulated enclosure cover adopts the Merlon that density has increased by 31.1～31.8%, the electrical insulating property performance obviously improves; Through Preliminary detection, TV signal is reduced to-26 ± 2dB by-10 ± 2dB through the return intensity of standing wave of transmission terminal load significantly, and the TV signal transmission quality obviously improves.
Description of drawings
Fig. 1 is the sketch map that meets thematic structure of the present invention; Fig. 2 is a load resistance structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing implementation detail of the present invention has been explained as follows:
Like Fig. 1, shown in 2; The load of a kind of TV signal transmission terminal comprises the inner wire 1 that contact pin constitutes, and is socketed on the insulated enclosure cover 2 of inner wire contact pin afterbody periphery; One end wire bonds is in the load resistance 3 of inner wire contact pin tail end; Be socketed on the cover in succession 4 of insulated enclosure cover periphery, it is characterized in that described load resistance is that resistance wire 31 helical forms of 75 ohm of resistance values are surrounded on the resistance that insulated column 32 constitutes, the manufacturing materials of described insulated enclosure cover is a Merlon.
As shown in Figure 2, resistance wire 31 outside diameter d of the load resistance 3 that said resistance value is 75 ohm are 0.3 millimeter≤d≤1.2 millimeter, and the length of resistance wire 31 is lengthened to and selectes the directly proportional respective length of outside diameter d.
Like Fig. 1, shown in 2, described load resistance 3 one end leads become the contact pin of inner wire 1, and the bend apical grafting behind crooked 180 degree of other end lead is in the intracavity bottom that overlaps 4 in succession.
As shown in Figure 1, the described 4 leading section inner chambers that overlap in succession are designed with connection with screw thread 41.
As shown in Figure 1, described 4 peripheries of overlapping in succession are designed with fastening with hexagon annular projection 42.
As shown in Figure 1, describedly overlap the cup cover shape that 4 rearward end are designed to hold load resistance 3 in succession.
In the practical implementation, all adopt corresponding common process to make.
Claims (6)
1. TV signal transmission terminal load; Comprise the inner wire (1) that contact pin constitutes; Be socketed on the insulated enclosure cover (2) of inner wire contact pin afterbody periphery, an end wire bonds is socketed on the cover in succession (4) of insulated enclosure cover periphery in the load resistance (3) of inner wire contact pin tail end; It is characterized in that described load resistance is that resistance wire (31) helical form of 75 ohm of resistance values is surrounded on the resistance that insulated column (32) constitutes, the manufacturing materials of described insulated enclosure cover is a Merlon.
2. TV signal transmission terminal according to claim 1 load; Resistance wire (31) outside diameter d that it is characterized in that the load resistance (3) of 75 ohm of said resistance values is 0.3 millimeter≤d≤1.2 millimeter, and the length L of resistance wire (31) is lengthened to and selectes the directly proportional respective length of outside diameter d.
3. TV signal transmission terminal according to claim 2 load is characterized in that described load resistance (3) one end leads become the contact pin of inner wire (1), and the bend apical grafting behind crooked 180 degree of other end lead is in the intracavity bottom that overlaps (4) in succession.
4. TV signal transmission terminal according to claim 1 load is characterized in that 5, a kind of radio frequency (RF) coaxial connector according to claim 1, it is characterized in that described (4) leading section inner chamber of cover in succession is designed with to connect with screw thread (41).
5. a kind of radio frequency (RF) coaxial connector according to claim 1 is characterized in that described (4) periphery of cover in succession is designed with fastening with hexagon annular projection (42).
6. a kind of radio frequency (RF) coaxial connector according to claim 1 is characterized in that described (4) rearward end of cover in succession is designed to hold the cup cover shape of load resistance (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103852029A CN102496430A (en) | 2011-11-29 | 2011-11-29 | Television signal transmission terminal load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103852029A CN102496430A (en) | 2011-11-29 | 2011-11-29 | Television signal transmission terminal load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102496430A true CN102496430A (en) | 2012-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103852029A Pending CN102496430A (en) | 2011-11-29 | 2011-11-29 | Television signal transmission terminal load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102496430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953148A (en) * | 2017-05-10 | 2017-07-14 | 江苏明联电子科技有限公司 | A kind of F types load with plum blossom groove |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6234838B1 (en) * | 1999-10-08 | 2001-05-22 | Shen-Chia Wong | Structure for a coaxial cable connector |
| US6334791B1 (en) * | 2000-07-12 | 2002-01-01 | Min-Hua Yeh | Load connector |
| US6491546B1 (en) * | 2000-03-07 | 2002-12-10 | John Mezzalingua Associates, Inc. | Locking F terminator for coaxial cable systems |
| CN101404507A (en) * | 2008-10-14 | 2009-04-08 | 邢红兵 | Terminal load for communication device |
| CN201303170Y (en) * | 2008-11-06 | 2009-09-02 | 镇江天安电信电器有限公司(中外合资） | Coaxial connector |
| CN202394614U (en) * | 2011-11-29 | 2012-08-22 | 镇江市丹徒区佳兴电子有限公司 | Television signal transmission terminal load |
-
2011
- 2011-11-29 CN CN2011103852029A patent/CN102496430A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6234838B1 (en) * | 1999-10-08 | 2001-05-22 | Shen-Chia Wong | Structure for a coaxial cable connector |
| US6491546B1 (en) * | 2000-03-07 | 2002-12-10 | John Mezzalingua Associates, Inc. | Locking F terminator for coaxial cable systems |
| US6334791B1 (en) * | 2000-07-12 | 2002-01-01 | Min-Hua Yeh | Load connector |
| CN101404507A (en) * | 2008-10-14 | 2009-04-08 | 邢红兵 | Terminal load for communication device |
| CN201303170Y (en) * | 2008-11-06 | 2009-09-02 | 镇江天安电信电器有限公司(中外合资） | Coaxial connector |
| CN202394614U (en) * | 2011-11-29 | 2012-08-22 | 镇江市丹徒区佳兴电子有限公司 | Television signal transmission terminal load |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953148A (en) * | 2017-05-10 | 2017-07-14 | 江苏明联电子科技有限公司 | A kind of F types load with plum blossom groove |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120613 |