CN202931293U - Transmitter double-machine switcher - Google Patents
Transmitter double-machine switcher Download PDFInfo
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- CN202931293U CN202931293U CN 201220651073 CN201220651073U CN202931293U CN 202931293 U CN202931293 U CN 202931293U CN 201220651073 CN201220651073 CN 201220651073 CN 201220651073 U CN201220651073 U CN 201220651073U CN 202931293 U CN202931293 U CN 202931293U
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Abstract
Disclosed is a transmitter double-machine switcher, comprising a power divider and a power combiner which are based on a 3dB coupler, four coaxial switches, and four absorption loads, wherein the power divider is respectively connected with two power amplification systems, with the isolation terminal of the power divider being connected with a first absorption load; two input terminals of the power combiner are respectively connected with the first coaxial switch and the third coaxial switch; one output terminal of the power combiner is connected with the fourth coaxial switch, with the other output terminal of the power combiner being connected with the second absorption load; the first coaxial switch is also respectively connected with the output terminal of the first power amplification system and the second coaxial switch; the second coaxial switch is respectively connected with the third absorption load, the third coaxial switch, and the fourth coaxial switch; the third coaxial switch is also connected with the output terminal of the second power amplification system; and the fourth coaxial switch is also connected with the fourth absorption load and the antenna feeder. Besides avoiding the waste of resources, the transmitter double-machine switcher avoids the problem that the whole machine output power is substantially decreased.
Description
Technical field
The utility model relates to lift-off technology, particularly relates to a kind of transmitter Double-unit switching device.
Background technology
In existing emission system (as the emission system of radio station), for the reliability that guarantees to broadcast, usually can adopt following dual mode:
One, the mode of dual-host backup.
Concrete, two transmitters are set, one is primary transmitter, another is the standby transmitter that carries out cold standby, when primary transmitter breaks down, carries out the switching of active and standby transmitter by coaxial switch, to guarantee the reliable broadcast of program.
Two, the synthetic mode of solid-state power amplifier.
Concrete, transmitter disposes powerful power combiner and N(N usually〉1) individual solid-state power amplifier (can referred to as power amplifier), when certain power amplifier goes wrong, although can adopt the mode that reduces output power of transmitter to proceed program broadcasts, but, due to the synthetic characteristics of power synthesizer self, the relation that can cause the total quantity of the total quantity of the power amplifier that amplitude that output power of transmitter reduces and complete machine configure and remaining normal power amplifier to be generally square.
A concrete example, setting transmitter is made of two parts power amplification system, can think that the total quantity of power amplifier is 2, when one of them power amplification system goes wrong, only has (2-1)=1 a power amplification system normal operation, be that the remaining power amplifier quantity that can work is 1, thereby the power output of transmitter is reduced to normal power output (1/2)
2=1/4, that is to say, in this case, the power output of complete machine is 25% of normal power output.
The inventor finds in realizing the utility model process: in mode one, the cold standby of transmitter easily forms resources idle, causes the wasting of resources; And in mode two, due to the particularity of the synthetic characteristics of powerful power combiner, can cause the decrease of complete machine power output.
Because the technical problem that existing emission system exists, the inventor is based on being engaged in this type of product design manufacturing abundant practical experience and professional knowledge for many years, and the utilization of cooperation scientific principle, positive research and innovation in addition, to founding a kind of transmitter Double-unit switching device of new structure, can overcome the problem that existing emission system exists, make it have more practicality.Through continuous research and design, and through repeatedly studying sample and improvement, finally create the utility model that has practical value.
The utility model content
Main purpose of the present utility model is, overcome the problem that existing emission system exists, and a kind of transmitter Double-unit switching device of new structure is provided, technical problem to be solved is, when avoiding the wasting of resources, avoid occurring the problem of complete machine power output decrease.
The purpose of this utility model and solve its technical problem and can realize by the following technical solutions.
A kind of transmitter Double-unit switching device according to the utility model proposes comprises: based on the power divider of three-dB coupler, the power combiner based on three-dB coupler, four coaxial switches and four absorbing loads; Described power divider all is connected with two power amplifying systems, and the isolation end of power divider is connected with the first absorbing load; An input of power combiner is connected with the first coaxial switch, and another input is connected with the 3rd coaxial switch, and an output of power combiner is connected with the 4th coaxial switch, and another output of power combiner is connected with the second absorbing load; The first coaxial switch also is connected respectively with output and second coaxial switch of the first power amplifying system; The second coaxial switch also is connected respectively with the 3rd absorbing load, the 3rd coaxial switch and the 4th coaxial switch; The 3rd coaxial switch also is connected with the output of the second power amplifying system; The 4th coaxial switch also with the antenna feeder line of the 4th absorbing load and emission system.
Better, aforesaid transmitter Double-unit switching device, when wherein said the first power amplifying system and the second power amplifying system parallel operation emission, the output of described the first power amplifying system is communicated with an input of described power combiner by the first coaxial switch, the output of described the second power amplifying system is communicated with another input of described power combiner by the 3rd coaxial switch, and the output of described power combiner is communicated with described antenna feeder by the 4th coaxial switch.
Better, aforesaid transmitter Double-unit switching device, when wherein said the first power amplifying system and the second power amplifying system and machine overhauling, the output of described the first power amplifying system is communicated with an input of described power combiner by the first coaxial switch, the output of described the second power amplifying system and being communicated with another input of described power combiner by the 3rd coaxial switch, and the output of described power combiner is communicated with described the 4th absorbing load by described the 4th coaxial switch.
Better, aforesaid transmitter Double-unit switching device, when wherein said the first power amplifying system maintenance and the normal operation of the second power amplifying system, the output of described the first power amplifying system is communicated with the 3rd absorbing load by described the first coaxial switch and the second coaxial switch, and the output of described the second power amplifying system is communicated with by described the 3rd coaxial switch, the second coaxial switch and the 4th coaxial switch and described antenna feeder.
Better, aforesaid transmitter Double-unit switching device, when wherein said the first power amplifying system normal operation and the maintenance of the second power amplifying system, the output of described the first power amplifying system is communicated with by described the first coaxial switch, the second coaxial switch and the 4th coaxial switch and described antenna feeder, and the output of described the second power amplifying system is communicated with the 3rd absorbing load by described the 3rd coaxial switch and the second coaxial switch.
Better, aforesaid transmitter Double-unit switching device, wherein said power divider comprises: the power divider of microstrip line form or strip line form or the linear formula of sling.
Better, aforesaid transmitter Double-unit switching device, input port and/or the output port of wherein said power divider comprise: SMA type interface, SMB type interface, BNC type interface, TNC type interface or N-type interface.
Better, aforesaid transmitter Double-unit switching device, wherein said power combiner comprises: the power divider of microstrip line form or the linear formula of sling.
Better, aforesaid transmitter Double-unit switching device, input port and/or the output port of wherein said power combiner comprise: N-type interface, L27 type interface, L29 type interface, BNC type interface, TNC type interface, 15/8 type are directly presented interface, 31/8 type is directly presented interface or flange form interface.
Better, aforesaid transmitter Double-unit switching device, wherein said power divider comprises: adopt the power divider of cross-couplings mode or adopt the power divider of non-cross-couplings mode; Described power combiner comprises: adopt the power divider of cross-couplings mode or adopt the power combiner of non-cross-couplings mode.
By technique scheme, transmitter Double-unit switching device of the present utility model has advantages of following advantages and beneficial effect at least: transmitter Double-unit switching device of the present utility model combines existing two-unit standby system and solid-state power amplifier synthesis mode separately, simultaneously and solved effectively that the standby usage transmitter has high input and the solid-state power amplifier problem that the complete machine power output significantly descends when breaking down; Under normal operation, the two-shipper parallel operation is broadcasted, and has guaranteed complete machine transmitting power and coverage, takes full advantage of station resource, and has improved capacity utilization, and reduced cost of equipment maintenance; And in unit maintenance situation, the phenomenon of decrease can not appear in the complete machine power output; In addition, that switch of the present utility model also has is simple to operate, dependable performance, switch speed are fast, the connection reliability advantages of higher, thereby has simplified operation sequence, has improved the useful life of switch.
In sum, the utility model has significant progress technically, and has significantly positive technique effect, is really a new and innovative, progressive, practical new design.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of specification, and for above and other purpose of the present utility model, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and the cooperation Figure of description, be described in detail as follows.
Description of drawings
Fig. 1 is the schematic diagram of transmitter Double-unit switching device of the present utility model;
Fig. 2 is the schematic diagram based on the power divider of three-dB coupler;
Fig. 3 is the schematic diagram based on the power combiner of three-dB coupler;
Fig. 4 is the schematic diagram of transmitter Double-unit switching device of the present utility model under two-shipper parallel operation working condition;
Fig. 5 is the schematic diagram of transmitter Double-unit switching device of the present utility model in two-shipper and machine overhauling situation;
Fig. 6 is the schematic diagram of transmitter Double-unit switching device of the present utility model under the first power amplifying system maintenance and the second power amplifying system working condition;
Fig. 7 is the schematic diagram of power amplifying system Double-unit switching device of the present utility model in the first power amplifying system work and the first power amplifying system maintenance situation.
Embodiment
Be to reach technological means and the effect that predetermined utility model purpose is taked for further setting forth the utility model, below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and actual effect to according to the transmitter Double-unit switching device that the utility model proposes are described in detail as follows.
The structure of transmitter Double-unit switching device of the present utility model as shown in Figure 1.
Transmitter Double-unit switching device in Fig. 1 mainly comprises: the power divider C1(based on three-dB coupler is the power divider based on three-dB coupler of small-signal), be powerful power combiner based on three-dB coupler based on the power combiner C2(of three-dB coupler), four coaxial switches (being S1, S2, S3 and S4) and four absorbing loads (R1, R2, R3 and R4 as shown in Figure 1).
Power divider C1 and two power amplifying systems (are the transmitter 1 shown in Fig. 1 and transmitter 2, these two power amplifying systems can be specially two solid-state power amplifiers) all connect, this power divider C1 also is connected with an absorbing load (being the R1 in Fig. 1).This power divider C1 answers strict conformance to the electrical length of the two paths of signals of two-way power amplifying system, is not more than 5 degree to guarantee phase difference between the two.
When as shown in Figure 2 situation of power divider C1,4 ports that this power divider C1 has are respectively E port, F port, G port and H port, wherein, the E port is input port, the F port is the isolated port that is connected with absorbing load R1, the G port is coupling port, and the H port is straight-through port; At this moment, G port and H port are got separately a half-power of input port (being the E port) (namely-3dB), still, the vector angle of two power are different, wherein G port and E port homophase, and H port hysteresis E port 90 degree (being designated as-90 spends).That is to say, in the situation that according to the mode of input shown in Figure 2, output and isolation load, the E port is as input (being connected with the input of transmitter 1), the F port is as isolation end (R1 is connected with absorbing load), and H port (being connected with the input of transmitter 2) hysteresis G port (being connected with the input of transmitter 1) 90 is spent; In the situation that not according to the mode of input shown in Figure 2, output and isolation load, if the F port as input, the E port is as isolation end, G port hysteresis H port 90 degree.
Power divider C1 of the present utility model can be the power divider of microstrip line form, also can be the power divider of strip line form, can also be the power divider of the linear formula of sling.This power divider C1 can adopt the cross-couplings mode, also can adopt non-cross-couplings mode.In addition, the input port of power divider C1 can be the high frequency interface of the various ways such as SMA type interface, SMB type interface, BNC type interface, TNC type interface or N-type interface, simultaneously, the output port of this power divider C1 can be the high frequency interface of the various ways such as SMA type interface, SMB type interface, BNC type interface, TNC type interface or N-type interface equally.
The input of power combiner C2 is connected with the first coaxial switch S1, thereby this input of power combiner C2 can be communicated with the output of transmitter 1 by the first coaxial switch S1; Another input of power combiner C2 is connected with the 3rd coaxial switch S3, thereby this input of power combiner C2 can be communicated with the output of transmitter 2 by the 3rd coaxial switch S3.The output of this power combiner C2 is connected with the 4th coaxial switch S4, thereby this output of power combiner C2 can be communicated with the antenna feeder of emission system by the 4th coaxial switch S4.In addition, another output of this power combiner C2 is connected with an absorbing load (being the R2 in Fig. 1).
Power combiner C2 is arranged between antenna feeder, absorbing load and power amplifying system, in actual applications, can look the difference of the status requirement between antenna feeder and two power amplifying systems, the installation site of choose reasonable power combiner C2.When its installation site is set, guarantee the electrical length strict conformance of the two-way radio frequency output line from power amplifying system to power combiner C2, guarantee that both phase differences are not more than 5 degree, to avoid increasing power loss when power is synthetic.
When as shown in Figure 3 situation of power combiner C2,4 ports that this power combiner C2 has are respectively I port, J port, K port and L port, wherein, I port and J port are input port, K port and L port are synthetic output port, and wherein, input phase is poor respectively is the two-way power signals of 90 degree for I port and J port, when I port hysteresis J port 90 degree (being designated as-90 degree), the two-way input power signal is synthetic at the K port; And when J port hysteresis I port 90 degree (being designated as-90 degree), the two-way input power signal is synthetic at the L port.
Power combiner C2 of the present utility model can be the power combiner of microstrip line form, also can be the power combiner of the linear formula of sling.This power combiner C2 can adopt the cross-couplings mode, also can adopt non-cross-couplings mode.In addition, the input port of this power combiner C2 can be for N-type interface, L27 type interface, L29 type interface, BNC type interface, TNC type interface, 15/8 type be directly presented interface, 31/8 type is directly presented the radio frequency interface of the various ways such as interface or flange form interface, and the output port of this power combiner C2 can be the high frequency interface of the various ways such as SMA type interface, SMB type interface, BNC type interface, TNC type interface or N-type interface equally.
The first coaxial switch S1 also is connected respectively with output and the second coaxial switch S2 of transmitter 1 except with the input of power combiner C2 is connected.Like this, the output of transmitter 1 can be communicated with the input of power combiner C2 by the first coaxial switch S1, perhaps is communicated with the second coaxial switch S2 by the first coaxial switch S1.
The second coaxial switch S2 is except with the first coaxial switch S1 is connected, also be connected respectively with an absorbing load (being the R3 shown in Fig. 1), the 3rd coaxial switch S3 and the 4th coaxial switch S4, thereby the second coaxial switch S2 can be communicated with the output of transmitter 1 or transmitter 2 with absorbing load R3, perhaps be communicated with the 4th coaxial switch S4.
The 3rd coaxial switch S3 is except with another input of power combiner C2 is connected, and also the output with transmitter 2 is connected.Like this, the output of transmitter 2 can be communicated with another input of power combiner C2 by the 3rd coaxial switch S3, perhaps is communicated with the second coaxial switch S2 by the 3rd coaxial switch S3.
The 4th coaxial switch S4 is except with the output of power combiner C2 and the second coaxial switch S2 are connected, also with the antenna feeder line of absorbing load R4 and emission system.Like this, in the situation that not via power combiner C2, the output of transmitter 1 can be communicated with the antenna feeder of emission system by the second coaxial switch S2 and the 4th coaxial switch S4, and perhaps the output of transmitter 2 can be communicated with the antenna feeder of emission system by the second coaxial switch S2 and the 4th coaxial switch S4.
Absorbing load R1 is the matched load that is used for isolation of power divider C1, absorbing load R2 is the matched load of power combiner C2, and absorbing load R3 and the R4 high-power absorbing load when to be single power amplifying system maintenance (being the unit maintenance) and two power amplifying systems overhaul simultaneously (namely also machine overhauling).
Under transmitter 1 and transmitter 2 parallel operation emission states, the operating state of transmitter Double-unit switching device of the present utility model as shown in Figure 4.
In Fig. 4, the output of transmitter 1 is communicated with the input of power combiner C2 by the first coaxial switch S1, is in off-state by the first coaxial switch S1 and the second coaxial switch S2 between transmitter 1 and absorbing load 3; The output of transmitter 2 is communicated with another input of power combiner C2 by the 3rd coaxial switch S3, is in off-state by the 3rd coaxial switch S3 and the second coaxial switch S2 between the output of transmitter 2 and absorbing load R3; The output of power combiner C2 is communicated with antenna feeder by the 4th coaxial switch S4.Like this, the output signal of transmitter 1 and transmitter 2 is carried out power at power combiner C2 place synthetic, and synthetic signal exports by antenna feeder, thereby transmitter 1 and transmitter 2 form the parallel operation emission states.
Under transmitter 1 and transmitter 2 parallel operation inspecting states, the operating state of transmitter Double-unit switching device of the present utility model as shown in Figure 5.
In Fig. 5, the output of transmitter 1 is communicated with the input of power combiner C2 by the first coaxial switch S1, is in off-state by the first coaxial switch S1 and the second coaxial switch S2 between transmitter 1 and absorbing load 3; The output of transmitter 2 is communicated with another input of power combiner C2 by the 3rd coaxial switch S3, is in off-state by the 3rd coaxial switch S3 and the second coaxial switch S2 between the output of transmitter 2 and absorbing load R3; The output of power combiner C2 is communicated with absorption resistance R4 by the 4th coaxial switch S4, and no longer is communicated with antenna feeder.Like this, the output signal of transmitter 1 and transmitter 2 is carried out power at power combiner C2 place synthetic, and synthetic signal export by antenna feeder, but by absorbing load R4 absorption, thereby transmitter 1 and transmitter 2 formation parallel operation inspecting states.
Under transmitter 1 maintenance and transmitter 2 normal operating conditionss, the operating state of transmitter Double-unit switching device of the present utility model as shown in Figure 6.
In Fig. 6, the output of transmitter 1 no longer is communicated with the input of power combiner C2 by the first coaxial switch S1, but is communicated with absorbing load 3 by the first coaxial switch S1 and the second coaxial switch S2; The output of transmitter 2 no longer is communicated with another input of power combiner C2 by the 3rd coaxial switch S3, but be communicated with the 4th coaxial switch S4 by the 3rd coaxial switch S3 and the second coaxial switch S2, and be communicated with antenna feeder by the 4th coaxial switch S4; The output of power combiner C2 is communicated with absorption resistance R4 by the 4th coaxial switch S4, and no longer is communicated with antenna feeder.Like this, it is synthetic that the signal of transmitter 1 output no longer carries out power, absorb but be absorbed load R3, and the output signal of transmitter 2 also no longer to carry out power synthetic, but directly export by antenna feeder, transmitter 1 overhauls and the state of transmitter 2 normal operations thereby form.
Under transmitter 1 normal operation and transmitter 2 inspecting states, the operating state of transmitter Double-unit switching device of the present utility model as shown in Figure 7.
In Fig. 7, the output of transmitter 1 no longer is communicated with the input of power combiner C2 by the first coaxial switch S1, but be communicated with the 4th coaxial switch S4 by the first coaxial switch S1 and the second coaxial switch S2, and directly be communicated with antenna feeder by the 4th coaxial switch S4; The output of transmitter 2 no longer is communicated with another input of power combiner C2 by the 3rd coaxial switch S3, but is communicated with absorbing load R3 by the 3rd coaxial switch S3 and the second coaxial switch S2; The output of power combiner C2 is communicated with absorption resistance R4 by the 4th coaxial switch S4, and no longer is communicated with antenna feeder.Like this, it is synthetic that the signal of transmitter 1 output no longer carries out power, but directly export by antenna feeder, and the output signal of transmitter 2 is also no longer carried out power and synthesized, absorb but be absorbed load R3, transmitter 1 works and the state of transmitter 2 maintenance thereby form.
the above is only preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, although the utility model discloses as above with preferred embodiment, yet be not to limit technology of the present utility model, any those skilled in the art are not within breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, any simple modification that foundation technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (10)
1. a transmitter Double-unit switching device, is characterized in that, this device comprises: based on the power divider of three-dB coupler, the power combiner based on three-dB coupler, four coaxial switches and four absorbing loads;
Described power divider all is connected with two power amplifying systems, and the isolation end of described power divider is connected with the first absorbing load;
An input of described power combiner is connected with the first coaxial switch, another input is connected with the 3rd coaxial switch, an output of power combiner is connected with the 4th coaxial switch, and another output of power combiner is connected with the second absorbing load;
The first coaxial switch also is connected respectively with output and second coaxial switch of the first power amplifying system;
The second coaxial switch also is connected respectively with the 3rd absorbing load, the 3rd coaxial switch and the 4th coaxial switch;
The 3rd coaxial switch also is connected with the output of the second power amplifying system;
The 4th coaxial switch also with the antenna feeder line of the 4th absorbing load and emission system.
2. transmitter Double-unit switching device as claimed in claim 1, it is characterized in that, when described the first power amplifying system and the second power amplifying system parallel operation emission, the output of described the first power amplifying system is communicated with an input of described power combiner by the first coaxial switch, the output of described the second power amplifying system is communicated with another input of described power combiner by the 3rd coaxial switch, and the output of described power combiner is communicated with described antenna feeder by the 4th coaxial switch.
3. transmitter Double-unit switching device as claimed in claim 1, it is characterized in that, when described the first power amplifying system and the second power amplifying system and machine overhauling, the output of described the first power amplifying system is communicated with an input of described power combiner by the first coaxial switch, the output of described the second power amplifying system and being communicated with another input of described power combiner by the 3rd coaxial switch, and the output of described power combiner is communicated with described the 4th absorbing load by described the 4th coaxial switch.
4. transmitter Double-unit switching device as claimed in claim 1, it is characterized in that, when described the first power amplifying system maintenance and the normal operation of the second power amplifying system, the output of described the first power amplifying system is communicated with the 3rd absorbing load by described the first coaxial switch and the second coaxial switch, and the output of described the second power amplifying system is communicated with by described the 3rd coaxial switch, the second coaxial switch and the 4th coaxial switch and described antenna feeder.
5. transmitter Double-unit switching device as claimed in claim 1, it is characterized in that, when described the first power amplifying system normal operation and the maintenance of the second power amplifying system, the output of described the first power amplifying system is communicated with by described the first coaxial switch, the second coaxial switch and the 4th coaxial switch and described antenna feeder, and the output of described the second power amplifying system is communicated with the 3rd absorbing load by described the 3rd coaxial switch and the second coaxial switch.
6. transmitter Double-unit switching device as claimed in claim 1, is characterized in that, described power divider comprises: the power divider of microstrip line form or strip line form or the linear formula of sling.
7. transmitter Double-unit switching device as claimed in claim 6, is characterized in that, input port and/or the output port of described power divider comprise: SMA type interface, SMB type interface, BNC type interface, TNC type interface or N-type interface.
8. transmitter Double-unit switching device as claimed in claim 1, is characterized in that, described power combiner comprises: the power divider of microstrip line form or the linear formula of sling.
9. transmitter Double-unit switching device as described in arbitrary claim in claim 1 to 7, it is characterized in that, input port and/or the output port of described power combiner comprise: N-type interface, L27 type interface, L29 type interface, BNC type interface, TNC type interface, 15/8 type are directly presented interface, 31/8 type is directly presented interface or flange form interface.
10. transmitter Double-unit switching device as described in arbitrary claim in claim 1 to 7, is characterized in that, described power divider comprises: adopt the power divider of cross-couplings mode or adopt the power divider of non-cross-couplings mode; Described power combiner comprises: adopt the power divider of cross-couplings mode or adopt the power combiner of non-cross-couplings mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220651073 CN202931293U (en) | 2012-11-30 | 2012-11-30 | Transmitter double-machine switcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220651073 CN202931293U (en) | 2012-11-30 | 2012-11-30 | Transmitter double-machine switcher |
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| Publication Number | Publication Date |
|---|---|
| CN202931293U true CN202931293U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220651073 Expired - Lifetime CN202931293U (en) | 2012-11-30 | 2012-11-30 | Transmitter double-machine switcher |
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| CN (1) | CN202931293U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347497A (en) * | 2018-11-30 | 2019-02-15 | 四川九洲电器集团有限责任公司 | A kind of dual-channel transmitter based on combiner |
| CN109818632A (en) * | 2019-03-21 | 2019-05-28 | 北京贝尔德科技有限责任公司 | A kind of novel broadcast transmitter switching system |
| CN110620593A (en) * | 2019-09-27 | 2019-12-27 | 北京北广科技股份有限公司 | Signalling equipment based on double-channel resource allocation |
| CN115378464A (en) * | 2022-08-12 | 2022-11-22 | 江苏德是和通信科技有限公司 | Synthetic switched systems of transmitter owner spare machine |
-
2012
- 2012-11-30 CN CN 201220651073 patent/CN202931293U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347497A (en) * | 2018-11-30 | 2019-02-15 | 四川九洲电器集团有限责任公司 | A kind of dual-channel transmitter based on combiner |
| CN109818632A (en) * | 2019-03-21 | 2019-05-28 | 北京贝尔德科技有限责任公司 | A kind of novel broadcast transmitter switching system |
| CN109818632B (en) * | 2019-03-21 | 2024-01-30 | 北京贝尔德科技有限责任公司 | Novel broadcast transmitter switching system |
| CN110620593A (en) * | 2019-09-27 | 2019-12-27 | 北京北广科技股份有限公司 | Signalling equipment based on double-channel resource allocation |
| CN110620593B (en) * | 2019-09-27 | 2021-04-06 | 北京北广科技股份有限公司 | Signalling equipment based on double-channel resource allocation |
| CN115378464A (en) * | 2022-08-12 | 2022-11-22 | 江苏德是和通信科技有限公司 | Synthetic switched systems of transmitter owner spare machine |
| CN115378464B (en) * | 2022-08-12 | 2023-08-15 | 江苏德是和通信科技有限公司 | Main and standby machine synthesis switching system of transmitter |
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