CN104410802A - Digital television emission system - Google Patents
Digital television emission system Download PDFInfo
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- CN104410802A CN104410802A CN201410765177.0A CN201410765177A CN104410802A CN 104410802 A CN104410802 A CN 104410802A CN 201410765177 A CN201410765177 A CN 201410765177A CN 104410802 A CN104410802 A CN 104410802A
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- digital television
- pass filter
- amplifier
- signal
- antenna
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Abstract
The invention relates to the technical field of communication, in particular to a digital television emission system. The digital television emission system comprises a receiving antenna, a low-pass filter, a main amplifier, an auxiliary amplifier and an emitting antenna, wherein the receiving antenna is used for receiving a terrestrial digital television radio frequency signal; a power distributor is arranged on the receiving antenna; the receiving antenna is connected with the main amplifier and the auxiliary amplifier through the low-pass filter; the power distributor is used for distributing the power of the received terrestrial digital television radio frequency signal; the distributed power signal is filtered through the low-pass filter and transmitted to the main amplifier and the auxiliary amplifier; terrestrial digital signals output by the main amplifier and the auxiliary amplifier are emitted through the emitting antenna. Therefore, the technical problem of relatively weak received terrestrial digital television signal in the prior art is solved and the technical effect of improving terrestrial digital television signal coverage is achieved.
Description
Technical field
The present invention relates to broadcasting television technology field, particularly relate to a kind of digital television transmissions system.
Background technology
TV has been popularized for most of family, the requirement of people to TV signal also gets more and more, because signal will be decayed when terrestrial digital signal penetrates barrier, make the coverage condition of existing ground digital television signal poor, cause terrestrial DTV to receive very difficult.
And prior art is launched after amplifying the digital television signal received again, and makes the bandwidth of band pass filter not too large again, is not suitable for home-use.
Summary of the invention
The embodiment of the present invention, by providing a kind of digital television transmissions system, solves the technical problem that the ground digital television signal that receives in prior art is poor, and then achieves the technique effect improving ground digital television signal and cover.
The invention provides a kind of digital television transmissions system, comprising: reception antenna, low pass filter, main amplifier and auxiliary amplifier, transmitting antenna;
Reception antenna receives terrestrial DTV radiofrequency signal, at reception antenna, power divider is set, reception antenna connects main amplifier and auxiliary amplifier by low pass filter, distributed by the power of power divider to the terrestrial DTV radiofrequency signal received, the power signal of distribution is first carried out filtering by low pass filter and is sent to main amplifier and auxiliary amplifier more respectively; The terrestrial digital signal exported by main amplifier and auxiliary amplifier is gone out through transmission antennas transmit.
Further, reception antenna is plate type antenna.
Further, transmitting antenna is sucker antenna.
Further, low pass filter comprises two electric capacity and an inductance, carries out filtering to the interference signal in the ground digital television signal received.
The one or more technical schemes provided in the embodiment of the present invention, at least have following technique effect or advantage:
Owing to adopting, reception antenna is set in digital television transmissions system, low pass filter, main amplifier and auxiliary amplifier, transmitting antenna, reception antenna receives terrestrial DTV radiofrequency signal, at reception antenna, power divider is set, reception antenna connects main amplifier and auxiliary amplifier by low pass filter, distributed by the power of power divider to the terrestrial DTV radiofrequency signal received, the power signal of distribution is first carried out filtering by low pass filter and is sent to main amplifier and auxiliary amplifier more respectively; The terrestrial digital signal exported by main amplifier and auxiliary amplifier is gone out through transmission antennas transmit, by low pass filter and main amplifier and auxiliary amplifier to the amplification of ground digital television signal, export efficient digital television signal, solve the technical problem that the ground digital television signal that receives in prior art is poor, thus improve the technique effect that ground digital television signal covers.
Accompanying drawing explanation
Fig. 1 is the module diagram of digital television transmissions system in the embodiment of the present invention.
Embodiment
The embodiment of the present invention, by providing a kind of digital television transmissions system, solves the technical problem that the ground digital television signal that receives in prior art is poor, and then achieves the technique effect improving ground digital television signal and cover.
In order to solve the poor technical problem of the ground digital television signal that receives in above-mentioned prior art, below in conjunction with Figure of description and concrete execution mode, technique scheme is described in detail.
The embodiment of the present invention provides a kind of digital television transmissions system, comprising: reception antenna 101, low pass filter 102, main amplifier 1031 and auxiliary amplifier 1032, transmitting antenna 104;
Reception antenna 101 receives terrestrial DTV radiofrequency signal, at reception antenna 101, power divider 105 is set, reception antenna 101 connects main amplifier 1031 and auxiliary amplifier 1032 by low pass filter 102, distributed by the power of power divider 105 to the terrestrial DTV radiofrequency signal received, the power signal of distribution is first carried out filtering by low pass filter 102 and is sent to main amplifier 1031 and auxiliary amplifier 1032 more respectively; The terrestrial digital signal exported by main amplifier 1031 and auxiliary amplifier 1032 is launched through transmitting antenna 104.
In a particular embodiment, ground digital television signal is received by reception antenna 101, this reception antenna 101 is specially plate type antenna, this reception antenna 101 place is provided with power divider 105, this power divider 105 distributes the ground digital television signal received, after distribution, filtering is carried out by low pass filter 102, this low pass filter 102 comprises two electric capacity and an inductance, filtering is carried out to the interference signal in the ground digital television signal after distribution, ground digital television signal after filtering interference signals is sent into main amplifier 1031 and auxiliary amplifier 1032, through main amplifier 1031, a part of signal wherein distributed is amplified, auxiliary amplifier 1032 pairs of another part signals amplify, finally the signal that main amplifier 1031 and auxiliary amplifier 1032 export is launched through transmitting antenna 104.This transmitting antenna 104 is sucker antenna.
Due to the effect of main amplifier 1031 and auxiliary amplifier 1032, make this digital television transmissions system linearity degree better, thus improve the overall linearity.
Due to the filtering of low pass filter 102 pairs of interference signals, thus improve the performance of the digital television signal received.Thus improve the covering of ground digital television signal.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (4)
1. a digital television transmissions system, is characterized in that, comprising: reception antenna, low pass filter, main amplifier and auxiliary amplifier, transmitting antenna;
Reception antenna receives terrestrial DTV radiofrequency signal, at reception antenna, power divider is set, reception antenna connects main amplifier and auxiliary amplifier by low pass filter, distributed by the power of power divider to the terrestrial DTV radiofrequency signal received, the power signal of distribution is first carried out filtering by low pass filter and is sent to main amplifier and auxiliary amplifier more respectively; The terrestrial digital signal exported by main amplifier and auxiliary amplifier is gone out through transmission antennas transmit.
2. digital television transmissions system according to claim 1, is characterized in that, reception antenna is plate type antenna.
3. digital television transmissions system according to claim 1, is characterized in that, transmitting antenna is sucker antenna.
4. digital television transmissions system according to claim 1, is characterized in that, low pass filter comprises two electric capacity and an inductance, carries out filtering to the interference signal in the ground digital television signal received.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765177.0A CN104410802A (en) | 2014-12-11 | 2014-12-11 | Digital television emission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765177.0A CN104410802A (en) | 2014-12-11 | 2014-12-11 | Digital television emission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104410802A true CN104410802A (en) | 2015-03-11 |
Family
ID=52648389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410765177.0A Pending CN104410802A (en) | 2014-12-11 | 2014-12-11 | Digital television emission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104410802A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874555A (en) * | 2005-05-31 | 2006-12-06 | 华为技术有限公司 | Method and device for raising output power of base station system |
| CN101588460A (en) * | 2008-05-21 | 2009-11-25 | 无锡科尔华电子有限公司 | Digital tuner |
| CN201655977U (en) * | 2010-02-11 | 2010-11-24 | 成都伟洪电子科技有限公司 | Relay antenna of terrestrial digital television |
| CN203136068U (en) * | 2013-03-01 | 2013-08-14 | 广州易迩达电子有限公司 | Multi-channel satellite digital television signal matrix receiving device |
| CN203675100U (en) * | 2013-12-31 | 2014-06-25 | 四川九洲电器集团有限责任公司 | Novel ADS-B antenna amplifier |
| CN104092965A (en) * | 2014-06-26 | 2014-10-08 | 北京数字电视国家工程实验室有限公司 | System and method for improving indoor coverage rate of terrestrial digital television signals |
-
2014
- 2014-12-11 CN CN201410765177.0A patent/CN104410802A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874555A (en) * | 2005-05-31 | 2006-12-06 | 华为技术有限公司 | Method and device for raising output power of base station system |
| CN101588460A (en) * | 2008-05-21 | 2009-11-25 | 无锡科尔华电子有限公司 | Digital tuner |
| CN201655977U (en) * | 2010-02-11 | 2010-11-24 | 成都伟洪电子科技有限公司 | Relay antenna of terrestrial digital television |
| CN203136068U (en) * | 2013-03-01 | 2013-08-14 | 广州易迩达电子有限公司 | Multi-channel satellite digital television signal matrix receiving device |
| CN203675100U (en) * | 2013-12-31 | 2014-06-25 | 四川九洲电器集团有限责任公司 | Novel ADS-B antenna amplifier |
| CN104092965A (en) * | 2014-06-26 | 2014-10-08 | 北京数字电视国家工程实验室有限公司 | System and method for improving indoor coverage rate of terrestrial digital television signals |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150311 |
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| RJ01 | Rejection of invention patent application after publication |