CN201341140Y - Shortwave multi-frequency transmission system - Google Patents
Shortwave multi-frequency transmission system Download PDFInfo
- Publication number
- CN201341140Y CN201341140Y CNU2009200501601U CN200920050160U CN201341140Y CN 201341140 Y CN201341140 Y CN 201341140Y CN U2009200501601 U CNU2009200501601 U CN U2009200501601U CN 200920050160 U CN200920050160 U CN 200920050160U CN 201341140 Y CN201341140 Y CN 201341140Y
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- shortwave
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- exciter
- unit
- power amplifier
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Abstract
The utility model discloses a shortwave multi-frequency transmission system, which comprises stimulators, a power amplifier and a harmonic filter, wherein two or more than two stimulators are connected with a radio-frequency controller; the radio-frequency controller is connected with the power amplifier and the harmonic filter respectively; and the power amplifier is connected with the harmonic filter. In the utility model, the shortwave multi-frequency transmission system achieves the function of simultaneously antagonizing a plurality of shortwave signal channels; the time-division technology is adopted, so as to interfere the frequencies of a plurality of virtual antagonizing objects in a time-slot way, reduce the sentence relativity of the antagonized signal channels and interfere the speech intelligibility of the sentences obtained by a receiver; therefore, the aim of multi-frequency antagonizing is achieved, and one device and one antenna can be used for antagonizing a plurality of shortwave signal channels simultaneously.
Description
Technical field
The utility model relates to shortwave electronic countermeasures radio communication device, relates in particular to a kind of shortwave multifrequency emission system.
Background technology
See also Fig. 1, existing shortwave countermeasures set mainly is made up of exciter, power amplifier and a harmonic filter.The short-wave signal of exciter output is delivered to after power amplifier carries out power amplification and is fed to antenna after the harmonic filter unit leaches harmonic wave signal is launched.Prior art is used an exciter, can only export one road frequency signal simultaneously, and promptly this countermeasures set can only be suppressed a short wave channel simultaneously.
Because existing shortwave countermeasures set exists an equipment can only resist the shortcoming of a short wave channel simultaneously, when needing to resist a plurality of object frequency simultaneously, just must use many countermeasures sets to work simultaneously, there is following shortcoming in this mode:
(1) electric power resource waste.Countermeasures set is generally powerful transmitter, uses the power supply of tens KVA even tens KVA during its work, and many transmitters are worked simultaneously and certainly will be caused the serious waste of electric power resource like this
(2) the site area demand is excessive, increases land expropriation cost, reduces the place and selects flexibility.Resisting a plurality of frequencies needs many transmitters, thereby need set up many antennas.(generally require spacing between the short-wave antenna) because the specification requirement of guard band between the transmitter antenna greater than antenna 2 times of arbitrary operation wavelength in service band; this will cause setting up more large tracts of land place of more equipment needs; thereby the increase land expropriation cost also reduces the place simultaneously and selects flexibility.
(3) phase mutual interference between the antenna reduces equipment work efficient.The restriction between a plurality of antennas because place, the spacing deficiency will cause phase mutual interference between the antenna between the antenna, thereby cause equipment work efficient to reduce.
(4) increase the equipment purchase expense.Resisting the required multiple devices of a plurality of frequencies will need to purchase many transmitters, and this will cause the increase of equipment purchase expense.
(5) reliability reduces countermeasures set needs long-time large power uninterrupted work, separate between the prior art transmitter, unrelated, can not back up the forming device redundant technique mutually, like this when an equipment causes fault because of working long hours, can cause equipment to work, this will cause the reduction of system works reliability.
Summary of the invention
Shortcoming at prior art, the purpose of this utility model provides a kind of shortwave multifrequency emission system, has solved that a plurality of frequencies of original technical antagonism need a plurality of transmitters and the phase mutual interference causes transmitter frequency to reduce between the antenna that brings, required site area is excessive, the wasting of resources and the low problem of equipment dependability.
To achieve these goals, the technical solution of the utility model is: a kind of shortwave multifrequency emission system, it comprises exciter, power amplifier and harmonic filter, two or more exciters are connected with a rf control unit, this rf control unit is connected with power amplifier, harmonic filter respectively, and power amplifier is connected with harmonic filter.
Described rf control unit comprises channel switch unit, control unit, keyboard unit and display unit, the channel switch unit is connected with control unit, control unit is connected with keyboard unit, display unit respectively, and described exciter is connected with channel switch unit, control unit respectively.
Described channel switch unit comprises the switching circuit of a plurality of independent switchings, and the number of switching circuit equates with the number of described exciter, each exciter and corresponding switching circuit connection.
Described control unit comprises microprocessor, the complicated programmable logic device that is connected with this microprocessor, and microprocessor is connected with described exciter, channel switch unit respectively, and complicated programmable logic device is connected with keyboard unit, display unit respectively.
Described keyboard unit comprises button and control circuit, and button is connected on the control circuit.
Each switching circuit is made up of two pin type diodes.
Compared with prior art, the utility model is finished the function that a plurality of short wave channels are resisted simultaneously, adopt time division technique, a plurality of plan antagonism object frequencies are carried out the branch time slot to be disturbed, reduce by the statement correlation of antagonism channel, interference receiver can obtain the intelligibility of speech of statement, realizes the purpose of multifrequency antagonism, makes and only uses an equipment common antenna can resist a plurality of short wave channels simultaneously.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is existing shortwave countermeasures set circuit block diagram.
Fig. 2 is a circuit system block diagram of the present utility model.
Fig. 3 is a rf control unit circuit block diagram of the present utility model.
Fig. 4 is a channel switch unit circuit block diagram of the present utility model.
Fig. 5 is a control unit circuit block diagram of the present utility model.
Fig. 6 is a display unit circuit block diagram of the present utility model.
Fig. 7 is a channel switch unit output schematic diagram of the present utility model.
Fig. 8 is a channel switch unit control signal sequential chart of the present utility model.
Embodiment
See also Fig. 2, the shortwave multifrequency emission system of present embodiment comprises power subsystem (not shown), three exciters (A, B, C), power amplifier, rf control unit, harmonic filter and antenna, and wherein exciter can be not limited to three.Three exciters are exported the white noise signal of 3 different frequencies in the shortwave frequency range respectively, and its frequency is provided with by rf control unit.Rf control unit mainly comprises channel switch unit, control unit, keyboard and display unit etc.; Rf control unit is mainly finished exciter frequency configuration, channel and is provided with, suppresses simultaneously functions such as frequency number setting and harmonic filter band setting switching time at interval, after the rf control unit setting is finished, at different time-gap the output signal of different exciters is connected to power amplifier, power amplifier is finished the exciter output signal is carried out the power amplification function, its small-signal with rf control unit output is amplified to be sent into harmonic filter behind the 2KW and carries out the filtering harmonic wave, be fed to broad-band antenna through feeder line and radiate, disturb when finishing three frequency channels.Exciter is the signal source of transmitter, 3.2 in the 26.1MHz scope desired all frequencies all produce by digital frequency synthesizer.The exciter job category is FM, and modulation signal is a white noise.
See also Fig. 3, rf control unit comprises channel switch unit, control unit, keyboard unit and display unit.The channel switch unit is finished three exciter radio frequency outputs and is switched, and control unit is finished time slot control, display unit control and the setting of exciter operating state of channel switch unit under keyboard unit control.
See also Fig. 4, crosstalk mutually and be coupled between the signal when guaranteeing that a plurality of signals switch, the channel switch unit adopts the three-way switch circuit to switch separately, two pin types of every route diode is formed, to guarantee when a certain fixedly time slot one tunnel is opened, two-way is strict in addition turn-offs, thereby avoids crosstalking mutually between the signal and being coupled.Use+12V voltage is as the control voltage of opening and turn-offing of pin type diode in the circuit, and+12V voltage signal control switch triode under the time slot signal control of control board is opened and turn-offed, thereby makes the pin pipe open or turn-off.Corresponding radio frequency output will export power amplifier to by the channel switch unit when the pin pipe is opened, and corresponding radio frequency output will be turned off when the pin pipe turn-offs.Adopt the frequency response index is good in the shortwave frequency range pin type diode as main radiofrequency signal control switch, can guarantee exciter output stream channel switch unit after decay little, frequency response characteristic is good.
See also Fig. 5, control unit adds complicated programmable logic device (Complex ProgrammableLogic Device) by single-chip microcomputer and forms, control unit is finished generation, keyboard response, display unit control and the setting of exciter operating state of channel switch unit switching sequence signal by the RS232 serial communication.
See also Fig. 6, keyboard unit comprises button and control circuit, and button comprises channel key, operating key, jumping figure key and space key etc. and is connected on the control circuit, is used to the setting of the mode of finishing the work.Channel key is used for being provided with the exciter operating state, operating key is used for the continuous compacting of the system that is provided with or frequency hopping time-division compacting pattern, can suppress simultaneously when the jumping figure key is used for being provided with frequency hopping time-division compacting pattern the number of channel, the slot time of every channel under merotype when space key is used for being provided with.
See also Fig. 7, suppose the short-wave signal of exciter 1 output 6MHz, exciter 2 output 9MHz, exciter 3 output 12MHz signals.Suppose that the slot time that is provided with is 10ms, the 6MHz signal of its output signal output driver 1 in the 10ms of 0-10ms so, the 9MHz signal of output driver 2 in the 10ms of 10-20ms, the 12MHz signal of output driver 3 in the 10ms of 20-30ms.The ensuing time circulates in this way.
See also Fig. 8, the sequential of channel switch unit control signal, supposing the system disturbs 3 the tunnel simultaneously, and each channel time is set to 10ms.
The utility model is under the constant situation of transmitter power, adopt time division technique, a plurality of plan antagonism object frequencies are carried out the branch time slot do antagonism, by reducing the statement correlation, the interference receiver intelligibility of speech, realize the purpose of multifrequency antagonism, so technology is than prior art conservation of power resource more when resisting the object frequency of as much; Can effectively overcome antenna of present jammer configuration, satisfy the excessive shortcoming in work-yard that minimum spacing causes between antenna, realize a plurality of frequency sharing common antennas, reduce the antenna installation site requirements, reduce the antenna farm land expropriation cost, increase the place and select flexibility, have obvious social and economic benefit; Realize a machine multifrequency, effectively reduce number of devices, reduce the outfit of equipment purchase cost, economic and practical, reasonable; A plurality of frequencies use an antenna can overcome phase mutual interference between the existing transmitter simultaneously, improve the equipment service efficiency; Adopt a plurality of exciter concurrent workings, separate, backup mutually increases device redundancy and flexibility, has improved system's use reliability.
Claims (6)
1, a kind of shortwave multifrequency emission system, it comprises exciter, power amplifier and harmonic filter, it is characterized in that, two or more exciters are connected with a rf control unit, this rf control unit is connected with power amplifier, harmonic filter respectively, and power amplifier is connected with harmonic filter.
2, shortwave multifrequency emission system according to claim 1, it is characterized in that, described rf control unit comprises channel switch unit, control unit, keyboard unit and display unit, the channel switch unit is connected with control unit, control unit is connected with keyboard unit, display unit respectively, and described exciter is connected with channel switch unit, control unit respectively.
3, shortwave multifrequency emission system according to claim 2, it is characterized in that, described channel switch unit comprises the switching circuit of a plurality of independent switchings, and the number of switching circuit equates with the number of described exciter, each exciter and corresponding switching circuit connection.
4, shortwave multifrequency emission system according to claim 2, it is characterized in that, described control unit comprises microprocessor, the complicated programmable logic device that is connected with this microprocessor, microprocessor is connected with described exciter, channel switch unit respectively, and complicated programmable logic device is connected with keyboard unit, display unit respectively.
5, shortwave multifrequency emission system according to claim 2 is characterized in that described keyboard unit comprises button and control circuit, and button is connected on the control circuit.
6, shortwave multifrequency emission system according to claim 3 is characterized in that, each switching circuit is made up of two pin type diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200501601U CN201341140Y (en) | 2009-01-15 | 2009-01-15 | Shortwave multi-frequency transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200501601U CN201341140Y (en) | 2009-01-15 | 2009-01-15 | Shortwave multi-frequency transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201341140Y true CN201341140Y (en) | 2009-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200501601U Expired - Fee Related CN201341140Y (en) | 2009-01-15 | 2009-01-15 | Shortwave multi-frequency transmission system |
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| Country | Link |
|---|---|
| CN (1) | CN201341140Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420618A (en) * | 2011-12-28 | 2012-04-18 | 熊猫电子集团有限公司 | Short-wave four-channel transmitter based on space-time coding |
| CN103746765A (en) * | 2013-12-25 | 2014-04-23 | 北京长峰广播通讯设备有限责任公司 | Shortwave experiment broadcast electronic countermeasure signal source device and voice signal interference method |
-
2009
- 2009-01-15 CN CNU2009200501601U patent/CN201341140Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420618A (en) * | 2011-12-28 | 2012-04-18 | 熊猫电子集团有限公司 | Short-wave four-channel transmitter based on space-time coding |
| CN103746765A (en) * | 2013-12-25 | 2014-04-23 | 北京长峰广播通讯设备有限责任公司 | Shortwave experiment broadcast electronic countermeasure signal source device and voice signal interference method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091104 Termination date: 20180115 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |