CN203445863U - Audio radio FM transmitter based on module networking - Google Patents
Audio radio FM transmitter based on module networking Download PDFInfo
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- CN203445863U CN203445863U CN201320505917.8U CN201320505917U CN203445863U CN 203445863 U CN203445863 U CN 203445863U CN 201320505917 U CN201320505917 U CN 201320505917U CN 203445863 U CN203445863 U CN 203445863U
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Abstract
The utility model discloses an audio radio FM transmitter based on module networking. The audio radio FM transmitter comprises an analog audio radio FM transmitter, a digital audio radio FM transmitter and a directional coupler. The output ends of the analog audio radio FM transmitter and the digital audio radio FM transmitter are connected with the input end of the directional coupler. The first output end of the directional coupler is connected with a load. The second output end of the directional coupler is connected with a filter. The output end of the filter is connected with an antenna. According to the audio radio FM transmitter, the directional coupler is employed, thus the digital audio radio FM transmitter is integrated into the original analog audio radio system, in this way, the hardware cost of an additional digital audio radio system is not needed, the resources and cost are saved, and the need of the coexistence of analog audio radio and digital audio radio is satisfied at the same time. The audio radio FM transmitter based on module networking in the utility model is widely applied in the field of digital and analog audio radio.
Description
Technical field
The utility model relates to voice communication technology, relates in particular to a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking.
Background technology
Along with the day by day increase of people to amount of information demand, the pressure of traditional analog audio broadcasting frequency modulated transmitter carrying is increasing, simultaneously due to analog fm signal there is antijamming capability a little less than, the inherent shortcoming such as coverage effect is undesirable, therefore in audio broadcasting field, digital audio broadcasting frequency modulated transmitter starts progressively to embody its advantage, as strong in antijamming capability, tonequality is outstanding, coverage effect is good etc.Hence one can see that, digital audio broadcasting frequency modulated transmitter replaces analogue audio frequency broadcast modulation transmitter and will be following trend, and in this replacement process, will inevitably occur the situation that digital audio broadcasting frequency modulated transmitter and analogue audio frequency broadcast modulation transmitter coexist.At present in order to adapt to this situation that coexists, its solution is the independent digital audio broadcasting frequency modulated transmitter of exploitation and sets up its corresponding overlay network, but this solution can greatly have been wasted most hardware resources of original analogue audio frequency broadcast system.Therefore, should work out a kind of audio broadcasting frequency modulated transmitter, thereby digital audio broadcasting frequency modulated transmitter can be incorporated in existing analogue audio frequency broadcast system.
Utility model content
In order to solve the problems of the technologies described above, the purpose of this utility model is to provide a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking.
The technical scheme that the utility model adopts is: a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking, it comprises analogue audio frequency broadcast modulation transmitter, digital audio broadcasting frequency modulated transmitter and directional coupler, the output of described analogue audio frequency broadcast modulation transmitter and the output of digital audio broadcasting frequency modulated transmitter are all connected with the input of directional coupler, the first output of described directional coupler is connected with load, the second output of described directional coupler is connected with filter, and the output of described filter is connected with antenna.
Further, described analogue audio frequency broadcast modulation transmitter comprises analog driver and the first power amplifier, and the output of described analog driver is connected by the first power amplifier and then with the first input end of directional coupler.
Further, described digital audio broadcasting frequency modulated transmitter comprises digit driver and the second power amplifier, and the output of described digit driver is connected by the second power amplifier and then with the second input of directional coupler.
Further, described analogue audio frequency broadcast modulation transmitter also comprises the first power module and the first monitoring module.
Further, described digital audio broadcasting frequency modulated transmitter also comprises second source module and the second monitoring module.
The beneficial effects of the utility model are: the utility model has adopted directional coupler, thereby digital audio broadcasting frequency modulated transmitter is incorporated in original analogue audio frequency broadcast system, so just without the hardware spending of extra digit audio droadcasting system, save resource and cost, met the needs that analogue audio frequency broadcast and digital audio broadcasting coexist simultaneously.In addition, the utility model also have advantages of simple in structure, be easy to realize and the availability of frequency spectrum high.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is the structured flowchart of a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking of the utility model;
Fig. 2 is the wandering direction schematic diagram of penetrating of the signal of directional coupler in a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking of the utility model;
Fig. 3 is the signal output schematic diagram in a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking of the utility model.
Embodiment
Shown in Fig. 1 and Fig. 2, a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking, it comprises analogue audio frequency broadcast modulation transmitter, digital audio broadcasting frequency modulated transmitter and directional coupler, the output of described analogue audio frequency broadcast modulation transmitter and the output of digital audio broadcasting frequency modulated transmitter are all connected with the input of directional coupler, the first output of described directional coupler (the 3rd port) is connected with load, the second output of described directional coupler (the second port) is connected with filter, the output of described filter is connected with antenna.Described directional coupler is mainly used for making transmitting on the guard band of digital audio and video signals modulation signal in analogue audio frequency broadcast frequency modulation signals.
Above-mentioned operation principle of the present utility model is: by utilizing directional coupler, thereby make the guard band of modulation signal in analogue audio frequency broadcast frequency modulation signals carry out digital audio and video signals transmission.Can obtain thus, by utilizing directional coupler, the utility model can make digital audio broadcasting frequency modulated transmitter incorporate in original analogue audio frequency broadcast system, so just without the hardware spending of extra digit audio droadcasting system (as filter, antenna feeder, the expense of radio frequency), greatly saved the input cost of resource and broadcast modulation networking, meet the needs that analogue audio frequency broadcast and digital audio broadcasting coexist simultaneously, but also can make full use of the channel of analogue audio frequency broadcast frequency modulation signals, make digital audio and video signals work in the guard band of existing FM simulation table, do not affect original FM frequency planning.In addition, transmitter of the present utility model also have advantages of simple in structure, be easy to realize.
Be further used as preferred embodiment, described analogue audio frequency broadcast modulation transmitter comprises analog driver and the first power amplifier, and the output of described analog driver passes through the first power amplifier and then is connected with the first input end (the first port) of directional coupler.The input access analog broadcasting audio-source of described analog driver.
Be further used as preferred embodiment, described digital audio broadcasting frequency modulated transmitter comprises digit driver and the second power amplifier, and the output of described digit driver passes through the second power amplifier and then is connected with second input (the 4th port) of directional coupler.The input access digital broadcasting audio-source of described digit driver.
Be further used as preferred embodiment, described analogue audio frequency broadcast modulation transmitter also comprises the first power module and the first monitoring module.The first described power module is respectively analog driver and the power supply of the first power amplifier.
Be further used as preferred embodiment, described digital audio broadcasting frequency modulated transmitter also comprises second source module and the second monitoring module.Described second source module is respectively digit driver and the power supply of the first power amplifier.
According to above-mentioned known, the utility model based on digital-to-analogue networking, its framework is, between the power amplifier of original analogue audio frequency broadcast modulation transmitter and filter, increased directional coupler and load, thereby digital audio broadcasting frequency modulated transmitter is incorporated in original analogue audio frequency broadcast system.The first power amplifier in analogue audio frequency broadcast modulation transmitter of the present utility model, the signal of its output can be first straight-through port by directional coupler most signals is passed to filter (signal of few part can loss on directional coupler or feed back to the output of the second power amplifier), all the other are identical with former network.The signal of the second power amplifier output in digital audio broadcasting frequency modulated transmitter the coupling port by directional coupler by the signal of small part be passed to filter (extremely most signal can be loaded in load, the signal of small part can loss on directional coupler or feed back to the output of the first power amplifier), all the other are identical with simple digital network.Can obtain thus, design core of the present utility model is, in originally single analog channel, to rely on the directional coupler of physical hardware to carry out mixed transfer, thereby digital audio broadcasting frequency modulated transmitter can be incorporated in former simulation audio droadcasting system.
Signal as shown in Figure 2 scatters and penetrates direction, further directional coupler of the present utility model is described in detail.With reference to Fig. 2, solid line represents straight-through signal stream, and dotted line represents the signal stream leaking.And relation between each port of directional coupler is as follows:
1, straight-through (effective output that analogue audio frequency broadcast modulation transmitter is main) between the first port and the second port, signal attenuation 0.6dB(S21).
2, straight-through (the useless power output that digital audio broadcasting frequency modulated transmitter is main) between the 3rd port and the 4th port, signal attenuation 0.6dB(S34).
3, the 3rd port is received the first port (the useless power that digital audio broadcasting frequency modulated transmitter is main, wherein few Partial Power leaks to the output of the first power amplifier), signal attenuation 10dB(S31).
4, the 4th port is received the first port (forward power of analogue audio frequency broadcast modulation transmitter, wherein few Partial Power leaks to the output of the second power amplifier), signal attenuation 30dB(S41).
5, the second port is received the 4th port (effective output that digital audio broadcasting frequency modulated transmitter is main), signal attenuation 10dB(S24).
Known in conjunction with Fig. 2, P2 and P4 are respectively analogue audio frequency broadcast modulation transmitter and the main effective output of digital audio broadcasting frequency modulated transmitter.Simultaneously, from the above, when the power P 1 of the signal of analogue audio frequency broadcast modulation transmitter transmitting is 70dBm(10kW), the power P 5 of the signal of digital audio broadcasting frequency modulated transmitter transmitting is 60dBm(1kW) time, the reverse maximum power P6 of digital audio broadcasting frequency modulated transmitter is P1+S41=70-30=40dBm, the echo power that is digital audio broadcasting frequency modulated transmitter is 40dBm, return loss 20dB, and the output VSWR that now digital audio broadcasting frequency modulated transmitter is read is 1.22, this numerical value is lower than 3.0 standing-wave ratio warning threshold, therefore system can trigger protection mechanism not moved, coupling backward power P6 can not cause damage to digital audio broadcast modulation transmitter, and the reverse maximum power P3 of analogue audio frequency broadcast modulation transmitter is P5+S34+S31=60-0.6-10=49.4 dBm.Can obtain thus; the echo power of simulating transmitting machine is about 50dBm; return loss is 20dB; and the output VSWR of now reading from simulating transmitting machine is 1.22; this numerical value is lower than 3.0 standing-wave ratio alarm thresholding; therefore system can trigger protection mechanism not moved, the backward power that is coupled P3 can not cause damage to simulating transmitting machine.
As shown in Figure 3, the frequency of digital audio broadcasting frequency modulated transmitter output is to use the guard band of analogue audio frequency broadcast modulation transmitter channel inside, be that digital audio and video signals is to transmit on the guard band of modulation signal in analogue audio frequency broadcast frequency modulation signals, that is to say, analogue audio frequency broadcast modulation transmitter and digital audio broadcasting frequency modulated transmitter, both are actually the different sub-bands that take same channel inside, can obtain thus, in fact analogue audio frequency broadcast modulation transmitter and digital audio broadcasting frequency modulated transmitter, the tranmitting frequency that both adopt is inconsistent, therefore, can not cause the mutual interference of signal phase.
More than that better enforcement of the present utility model is illustrated, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to the utility model spirit, and the distortion that these are equal to or replacement are all included in the application's claim limited range.
Claims (5)
1. the audio broadcasting frequency modulated transmitter based on digital-to-analogue networking, it is characterized in that: it comprises analogue audio frequency broadcast modulation transmitter, digital audio broadcasting frequency modulated transmitter and directional coupler, the output of described analogue audio frequency broadcast modulation transmitter and the output of digital audio broadcasting frequency modulated transmitter are all connected with the input of directional coupler, the first output of described directional coupler is connected with load, the second output of described directional coupler is connected with filter, and the output of described filter is connected with antenna.
2. a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking according to claim 1, it is characterized in that: described analogue audio frequency broadcast modulation transmitter comprises analog driver and the first power amplifier, the output of described analog driver is connected by the first power amplifier and then with the first input end of directional coupler.
3. a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking according to claim 2, it is characterized in that: described digital audio broadcasting frequency modulated transmitter comprises digit driver and the second power amplifier, the output of described digit driver is connected by the second power amplifier and then with the second input of directional coupler.
4. a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking according to claim 2, is characterized in that: described analogue audio frequency broadcast modulation transmitter also comprises the first power module and the first monitoring module.
5. a kind of audio broadcasting frequency modulated transmitter based on digital-to-analogue networking according to claim 3, is characterized in that: described digital audio broadcasting frequency modulated transmitter also comprises second source module and the second monitoring module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320505917.8U CN203445863U (en) | 2013-08-16 | 2013-08-16 | Audio radio FM transmitter based on module networking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320505917.8U CN203445863U (en) | 2013-08-16 | 2013-08-16 | Audio radio FM transmitter based on module networking |
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| Publication Number | Publication Date |
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| CN203445863U true CN203445863U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320505917.8U Expired - Fee Related CN203445863U (en) | 2013-08-16 | 2013-08-16 | Audio radio FM transmitter based on module networking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457615A (en) * | 2013-08-16 | 2013-12-18 | 奥维通信股份有限公司 | Audio broadcasting frequency modulation transmitter based on digital-analog networking |
| CN107947884A (en) * | 2017-11-17 | 2018-04-20 | 深圳思凯微电子有限公司 | A kind of digital-to-analogue broadcast singal combining device and method |
-
2013
- 2013-08-16 CN CN201320505917.8U patent/CN203445863U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457615A (en) * | 2013-08-16 | 2013-12-18 | 奥维通信股份有限公司 | Audio broadcasting frequency modulation transmitter based on digital-analog networking |
| CN107947884A (en) * | 2017-11-17 | 2018-04-20 | 深圳思凯微电子有限公司 | A kind of digital-to-analogue broadcast singal combining device and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20210816 |