CN102916708B - Power adjustment device of radio emitter and radio emitter - Google Patents
Power adjustment device of radio emitter and radio emitter Download PDFInfo
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- CN102916708B CN102916708B CN201210400960.8A CN201210400960A CN102916708B CN 102916708 B CN102916708 B CN 102916708B CN 201210400960 A CN201210400960 A CN 201210400960A CN 102916708 B CN102916708 B CN 102916708B
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Abstract
The embodiment of the invention discloses a power adjustment device of a radio emitter and the radio emitter. The power adjustment device of the radio emitter comprises a control unit, an input numerical control attenuation unit connected with the control unit, an output numerical control attenuation unit connected with the control unit and a power coupling and sampling unit connected with the control unit, wherein the control unit adjusts an attenuation amount of the input numerical control attenuation unit or adjusts an attenuation amount of the input numerical control attenuation unit and the attenuation amount of the output numerical control attenuation unit according to output power and reflection power until the power coupling and sampling unit detects that the output power of a power amplifier meets an output power preset value. By adopting the power adjustment device of the radio emitter and the radio emitter, the power amplifier can automatically and safely reach the output power preset value, and operation and maintenance of equipment are simplified.
Description
Technical field
The embodiment of the present invention relates to technical field of radio, relates in particular to a kind of power adjustment apparatus and radio transmitter of radio transmitter.
Background technology
The power adjustment of existing radio frequency interference equipment (as radio transmitter), be after device power-up, in change interference waveform, the radio frequency input and output attenuation parameter that needs each frequency range of operating personnel's manual adjustments, then open power amplifier, again according to the power output indicated value of power amplifier, regulate step by step attenuation parameter, until the power output of power amplifier reaches desired level, in this process, also need constantly to monitor reflection power, with the power output of regulating power amplifier.
Because equipment generally has a lot of frequency ranges, while changing interference waveform, power adjusting operation is safeguarded and is wasted time and energy, once occur that operate miss also can damage power amplifier at every turn.And, needing veteran operating personnel, maintenance cost is high.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of power adjustment apparatus and radio transmitter, simplifying operation of equipment and maintenance of radio transmitter.
The object of the embodiment of the present invention is achieved through the following technical solutions:
A power adjustment apparatus for radio transmitter, the input numerical control attenuation units that comprise control unit, is connected with described control unit, the output numerical control attenuation units being connected with described control unit and the power coupling sampling unit being connected with described control unit:
The first signal that described input numerical control attenuation units sends for receiving baseband signal source, and obtain secondary signal by the level that the attenuation that described control unit is controlled described input numerical control attenuation units is adjusted described first signal, described secondary signal is transferred to frequency converter, so that described frequency converter carries out up-conversion to described secondary signal, obtains the 3rd signal and transmit described the 3rd signal to described output numerical control attenuation units;
Described output numerical control attenuation units is for receiving described the 3rd signal of described frequency converter transmission, and obtain the 4th signal by the level that the attenuation that described control unit is controlled described output numerical control attenuation units is adjusted described the 3rd signal, described the 4th signal is transferred to power amplifier, so that described power amplifier carries out power amplification to described the 4th signal and exports to described power coupling sampling unit;
Described power coupling sampling unit is for detection of power output and the reflection power of described power amplifier, and the described power output detecting and described reflection power are transferred to described control unit;
Described control unit is used for according to power output predetermined value, reflection power threshold value and described power output and described reflection power, control the attenuation of described output numerical control attenuation units, or control the attenuation of described input numerical control attenuation units and the attenuation of described output numerical control attenuation units, until described power coupling sampling unit detects the power output of described power amplifier, reach described power output predetermined value.
A radio transmitter, comprises the power adjustment apparatus of above-mentioned radio transmitter.
The technical scheme being provided by the invention described above embodiment can be found out, control unit is according to power output predetermined value, reflection power threshold value and power output and reflection power, control the attenuation of output numerical control attenuation units, or the attenuation of the attenuation of control inputs numerical control attenuation units and output numerical control attenuation units, automatically realize power amplifier and reach safely power output predetermined value, simplified the operation and maintenance of equipment.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The formation schematic diagram of the power adjustment apparatus of the radio transmitter that Fig. 1 provides for the embodiment of the present invention.
The formation schematic diagram of the radio transmitter that Fig. 2 provides for the embodiment of the present invention.
Formation schematic diagram under the power adjustment apparatus application scenarios of the radio transmitter that Fig. 3 provides for the embodiment of the present invention.
Formation schematic diagram under the power adjustment apparatus application scenarios of the radio transmitter that Fig. 4 provides for the embodiment of the present invention.
The application flow schematic diagram of the power adjustment apparatus of the radio transmitter that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to protection scope of the present invention.
As shown in Figure 1, the embodiment of the present invention provides a kind of power adjustment apparatus of radio transmitter, the input numerical control attenuation units 12 that comprise control unit 11, is connected with control unit 11, the output numerical control attenuation units 13 being connected with control unit 11 and the power coupling sampling unit 14 being connected with control unit 11:
The first signal that input numerical control attenuation units 12 sends for receiving baseband signal source, and obtain secondary signal by the level that the attenuation of control unit 11 control inputs numerical control attenuation units 12 is adjusted described first signal, described secondary signal is transferred to frequency converter, so that described frequency converter carries out up-conversion to described secondary signal, obtains the 3rd signal and transmit described the 3rd signal to output numerical control attenuation units 13;
Output numerical control attenuation units 13 is for receiving described the 3rd signal of described frequency converter transmission, and obtain the 4th signal by the level that the attenuation that control unit 11 is controlled output numerical control attenuation units 13 is adjusted described the 3rd signal, described the 4th signal is transferred to power amplifier, so that described power amplifier carries out power amplification to described the 4th signal and exports to power coupling sampling unit 14;
Power coupling sampling unit 14 is for detection of power output and the reflection power of described power amplifier, and the described power output detecting and described reflection power are transferred to control unit 11;
Control unit 11 is for according to power output predetermined value, reflection power threshold value and described power output and described reflection power, control the attenuation of output numerical control attenuation units 13, or the attenuation of the attenuation of control inputs numerical control attenuation units 12 and output numerical control attenuation units 13, reaches described power output predetermined value until power coupling sampling unit 14 detects the power output of described power amplifier.
As seen from the above technical solution provided by the invention, control unit is according to power output and reflection power, adjust the attenuation of input numerical control attenuation units and/or the attenuation of output numerical control attenuation units, automatically realize power amplifier and reach safely power output predetermined value, simplify the operation and maintenance of equipment, avoided manual safeguard expensive of operating personnel.
Wherein, the signal that base band sources sends is intermediate-freuqncy signal.Radio transmitter is as radio frequency interference equipment, and the signal that base band sources sends can be thought interference signal.
Wherein, the level unit of signal is dB (decibel).
Wherein, the power output predetermined value of power amplifier can be the specified peak power output value of power amplifier, the specified peak power output value that it will be understood by those skilled in the art that power amplifier is that the device of power amplifier own determines, at this, does not repeat.Reflection power threshold value can be 10% of the specified peak power output value of power amplifier, but is not limited to 10%, and reflection power threshold value can be adjusted according to specific needs.
Can set in advance power output predetermined value and the reflection power threshold value of power amplifier, so that control unit is according to power output predetermined value, reflection power threshold value and power output and reflection power, control the attenuation of output numerical control attenuation units, or the attenuation of the attenuation of control inputs numerical control attenuation units and output numerical control attenuation units.
Wherein, control unit 11 also can be understood as controller, input numerical control attenuation units 12 also can be understood as input numerical-control attenuator, and output numerical control attenuation units 13 also can be understood as output numerical-control attenuator, and power coupling sampling unit 14 also can be understood as power coupling sampling module.
Control unit 11 can be by MCU (Micro Control Unit, microcontroller) form, it adopts microcontroller software technology, from control interface, extract power output and the reflection power of the power amplifier of power coupling sampling unit 14 extractions, and by the control interface corresponding with input numerical control attenuation units 12 and output numerical control attenuation units 13, control the attenuation of adjusting input numerical control attenuation units 12 and/or output numerical control attenuation units 13.Interface standard can be RS422/232, but unrestricted.MCU can be understood referring to prior art, and therefore not to repeat here.
Wherein, power coupling sampling unit 14 can comprise coupler module and wave detector module, and power coupling sampling unit specifically can be understood referring to prior art, and therefore not to repeat here.
Particularly, control unit 11 specifically can be for: the attenuation that the attenuation of controlling output numerical control attenuation units 12 is initially maximum attenuation amount and control inputs numerical control attenuation units 13 is initially maximum attenuation amount, according to described reflection power, be less than described reflection power threshold value and described power output is less than described power output predetermined value, the attenuation of output numerical control attenuation units 13 is turned in stepping down, until described power output reaches described power output predetermined value, wherein, step value is 1dB (decibel) or 0.5dB;
When the attenuation of output numerical control attenuation units 13, turning down is 0, when the power output that power coupling sampling unit 14 detects described power amplifier does not reach described power output predetermined value, the attenuation of input numerical control attenuation units 12 is turned in stepping down, until described power output reaches described power output predetermined value, wherein, step value is 1dB or 0.5dB.
Wherein, maximum attenuation amount is determined by device itself, generally adopts the attenuator of 31.5dB, and the maximum attenuation amount of described output numerical control attenuation units is 31.5dB, and the maximum attenuation amount of described input numerical control attenuation units is 31.5dB.
Particularly, control unit 11 can also be connected with power amplifier, and control unit 11 also specifically can be for: according to described power output, equal described reflection power, send alarm and indicate and control and close described power amplifier.
Wherein, the power output of power amplifier equals reflection power, and the power output and the reflection power that can be understood as power amplifier are almost equal.Namely, if the power output of power amplifier and reflection power are almost equal, illustrate that power amplifier output antenna does not connect (or antenna mismatch), need so to stop the power output of Modulating Power amplifier, as close power amplifier, and sending alarm indication, prompting antenna does not connect (or antenna mismatch).
Or control unit 11 also specifically can be for: equal described reflection power threshold value according to described reflection power, send alarm and indicate and control and close described power amplifier.
Namely, reflection power is crossed conference burns out power amplifier, in order to prevent that power amplifier from burning out, according to reflection power, equals reflection power threshold value, sends alarm and indicates and control and close power amplifier.
Or, control unit 11 also specifically can be for: according to the attenuation of output numerical control attenuation units 13 be 0 and the attenuation of input numerical control attenuation units 12 be 0 o'clock, described power output does not reach described power output predetermined value, sends alarm and indicates and control and close described power amplifier.
Namely, if input numerical control attenuation units and output numerical-control attenuator unit are transferred to 0, but power amplifier output power can't reach peak power output value, control unit sends alarm indication, prompting may baseband signal power output too little or do not have, or the amplifier module of frequency converter has fault, the signal power that causes frequency converter to output to power amplifier diminishes, and causes power amplifier can not exit the power needing.
Optionally, control unit 11 can connect alarm unit (as buzzer, LED lamp), and control unit 11 is controlled buzzer by output low and high level and sent buzzing, LED blinking red lamp, and prompting is reported to the police, and at this, does not repeat.Wherein, the LED that different alarm condition can be corresponding different, to realize differentiation.
The power adjustment apparatus of embodiment radio transmitter for a better understanding of the present invention, the base band sources relating to, frequency converter and power amplifier, can do following understanding: base band sources transmitted signal; Frequency converter carries out frequency conversion adjustment to the received signal, comprises up-conversion or down-conversion, and up-conversion, if the frequency of the signal receiving is 40-240MHz (megahertz), is 800-1000MHz by output frequency after frequency converter; Power amplifier carries out power amplification to the received signal, and can pass through antenna transmission.Correlation technique specifically can be understood referring to prior art, and therefore not to repeat here.
The power adjustment apparatus of radio transmitter of the present invention, after start and change interference waveform, the power output of automatic power adjustment amplifier, can prevent from damaging due to the power amplifier that antenna does not connect or antenna mismatch causes simultaneously, simplify the operation and maintenance of jamming equipment, reduced maintenance cost.
As shown in Figure 2, the embodiment of the present invention provides a kind of radio transmitter 21, comprises the power adjustment apparatus 22 of the radio transmitter of above-described embodiment.
Further, embodiment of the present invention radio transmitter, can also comprise frequency converter and power amplifier.
Optionally, embodiment of the present invention radio transmitter, can also comprise base band sources.
As shown in Figure 3, radio transmitter comprises power adjustment apparatus, base band sources 31, frequency converter 32 and the power amplifier 33 of radio transmitter.Further, the power adjustment apparatus of radio transmitter comprises control unit 34, input numerical control attenuation units 35, output numerical control attenuation units 36 and power coupling sampling unit 37.
Concrete, base band sources 31 connects input numerical control attenuation units 35, input numerical control attenuation units 35 is connected frequency converter 32 with output numerical control attenuation units 36, output numerical control attenuation units 36 is connected power amplifier 33 with power coupling sampling unit 37, power amplifier 33 connects antenna (ANT), and control unit 11 connects power amplifier 33.
Or, input numerical control attenuation units and output numerical control attenuation units are put into frequency converter the inside, the power sampling unit function that is coupled is integrated into power amplifier the inside, control module arranges the input and output numerical control attenuation units in frequency converter by communication interface, obtains power output and the reflection power of power amplifier by control interface.As shown in Figure 4, base band sources 41 connects frequency converter 42, input numerical control attenuation units and output numerical control attenuation units and frequency converter 42 are arranged at one, frequency converter 42 connects power amplifier 43, power coupling sampling unit and power amplifier 43 are arranged at one, power amplifier 43 connects antenna (ANT), and control unit 44 connects power amplifier 43.
As shown in Figure 5, illustrate how the power adjustment apparatus of embodiment of the present invention radio transmitter realizes the power output adjustment of power amplifier:
When radio transmitter is opened, the switch of power amplifier acquiescence is closed.
51, control unit output numerical control attenuation units is set to maximum.
The attenuation of control unit output numerical control attenuation units is set to maximum.
52, control unit input numerical control attenuation units is set to maximum.
The attenuation of control unit input numerical control attenuation units is set to maximum.
Step 51 and 52 does not have strict sequence requirement.
53, control unit is opened power amplifier.
Control unit is opened the switch of power amplifier.
54, whether control unit judgement output numerical control attenuation units is reduced to minimum value.
Whether the attenuation of control unit judgement output numerical control attenuation units is minimum value, as 0, if so, enters 510, if not, enters 55.
55, control unit stepping reduces to export the value of numerical control attenuation units.
Control unit stepping reduces to export the attenuation of numerical control attenuation units, and step value is 1dB.
56, control unit obtains power amplifier parameter.
Control unit obtains power output and the reflection power of power amplifier by the power sampling unit that is coupled.
57, control unit judges whether reflection power is greater than safety value.
Control unit judges whether reflection power is greater than (comprise and equaling) reflection power threshold value (being safety value), if so, enters 59, if not, enters 58.
58, control unit judges whether power output reaches preset value.
Control unit judges whether power output (also can be called transmitting power) reaches power output preset value (as the specified peak power output value of power amplifier), if so, adjusts and finishes, and if not, enters 54.
59, control unit is controlled and is closed power amplifier, and sends alarm indication.
510, whether control unit judgement input numerical control attenuation units is reduced to minimum value.
Whether the attenuation of control unit judgement input numerical control attenuation units is minimum value, as 0, if so, enters 512, if not, enters 511.
511, control unit stepping reduces to input the value of numerical control attenuation units.
Control unit stepping reduces the attenuation of defeated number controlling attenuation unit, and step value is 1dB.
After 511, also enter 56 control units and obtain power amplifier parameter.
512, control unit obtains power amplifier parameter.
Control unit obtains power output and the reflection power of power amplifier by the power sampling unit that is coupled.
513, control unit judges whether reflection power is greater than safety value.
Control unit judges whether reflection power is greater than (comprise and equaling) reflection power threshold value, if so, enters 59, if not, enters 514.
514, control unit judges whether power output reaches preset value.
Control unit judges whether power output reaches power output preset value (as the specified peak power output value of power amplifier), if so, adjusts and finishes, and if not, enters 59.
Visible, when radio transmitter is opened, the switch acquiescence of power amplifier is closed, the attenuation that first MCU of control unit inputs numerical control attenuation units and output numerical control attenuation units is set to maximum, then open power amplifier output, by the power sampling module that is coupled, obtain power output and the reflection power of power amplifier.First reduce to export the attenuation of numerical control attenuation units, the power output of readout power amplifier and reflection power, if the almost equal explanation power amplifier output of power output and reflection power antenna does not connect, stop Modulating Power, close power amplifier, send alarm indication.If there is no total reflection, first see reflection power value, if reflection power reaches or exceeds safety value, stop adjusting, send alarm indication, if reflection power does not exceed safety value, see whether power output reaches maximum power output, if do not reached, continue to reduce to export the attenuation of numerical control attenuation units, so repeatedly, until reach the maximum power output of power amplifier, if the attenuation of output numerical control attenuation units is transferred to minimum value, can't reach the maximum power output of power amplifier, start to adjust the attenuation of input numerical control attenuation units, repeat this process, until the power output of power amplifier reaches maximum.If the attenuation of input numerical control attenuation units and output numerical control attenuation units is transferred to minimum, power amplifier output power can't reach peak power output, prompting may baseband signal power output too little or do not have, or the amplifier module of frequency converter has fault, provide corresponding alarm indication.
The power adjustment apparatus of radio transmitter of the present invention, after start and change interference waveform, the power output of automatic power adjustment amplifier, can prevent from damaging due to the power amplifier that antenna does not connect or antenna mismatch causes simultaneously, simplify the operation and maintenance of jamming equipment, reduced maintenance cost.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Claims (9)
1. the power adjustment apparatus of a radio transmitter, it is characterized in that the input numerical control attenuation units that comprise control unit, is connected with described control unit, the output numerical control attenuation units being connected with described control unit and the power coupling sampling unit being connected with described control unit:
The first signal that described input numerical control attenuation units sends for receiving baseband signal source, and obtain secondary signal by the level that the attenuation that described control unit is controlled described input numerical control attenuation units is adjusted described first signal, described secondary signal is transferred to frequency converter, so that described frequency converter carries out up-conversion to described secondary signal, obtains the 3rd signal and transmit described the 3rd signal to described output numerical control attenuation units;
Described output numerical control attenuation units is for receiving described the 3rd signal of described frequency converter transmission, and obtain the 4th signal by the level that the attenuation that described control unit is controlled described output numerical control attenuation units is adjusted described the 3rd signal, described the 4th signal is transferred to power amplifier, so that described power amplifier carries out power amplification to described the 4th signal and exports to described power coupling sampling unit;
Described power coupling sampling unit is for detection of power output and the reflection power of described power amplifier, and the described power output detecting and described reflection power are transferred to described control unit;
Described control unit is used for according to power output predetermined value, reflection power threshold value and described power output and described reflection power, control the attenuation of described output numerical control attenuation units, or control the attenuation of described input numerical control attenuation units and the attenuation of described output numerical control attenuation units, until described power coupling sampling unit detects the power output of described power amplifier, reach described power output predetermined value.
2. adjusting device according to claim 1, it is characterized in that, the attenuation that described control unit is initially maximum attenuation amount specifically for: the attenuation of controlling described output numerical control attenuation units and controls described input numerical control attenuation units is initially maximum attenuation amount, according to described reflection power, be less than described reflection power threshold value and described power output is less than described power output predetermined value, the attenuation of described output numerical control attenuation units is turned in stepping down, until described power output reaches described power output predetermined value, wherein, step value is 1dB or 0.5dB,
When the attenuation of described output numerical control attenuation units, turning down is 0, when the power output that described power coupling sampling unit detects described power amplifier does not reach described power output predetermined value, the attenuation of described input numerical control attenuation units is turned in stepping down, until described power output reaches described power output predetermined value, wherein, step value is 1dB or 0.5dB.
3. adjusting device according to claim 2, it is characterized in that, described control unit is connected with described power amplifier, described control unit also specifically for: according to described power output, equal described reflection power, send alarm and indicate and control and close described power amplifier;
Or, according to described reflection power, equal described reflection power threshold value, send alarm and indicate and control and close described power amplifier;
Or, according to the attenuation of described output numerical control attenuation units be 0 and the attenuation of described input numerical control attenuation units be 0 o'clock, described power output does not reach described power output predetermined value, sends alarm and indicates and control and close described power amplifier.
4. adjusting device according to claim 1, is characterized in that, the specified peak power output value that described power output predetermined value is described power amplifier, 10% of the specified peak power output value that described reflection power threshold value is described power amplifier.
5. adjusting device according to claim 1, is characterized in that, described first signal is intermediate-freuqncy signal.
6. adjusting device according to claim 1, is characterized in that, described control unit comprises microcontroller.
7. adjusting device according to claim 1, is characterized in that, described power coupling sampling unit comprises coupler module and wave detector module.
8. a radio transmitter, is characterized in that, comprises as the power adjustment apparatus of the radio transmitter as described in arbitrary in claim 1-7.
9. radio transmitter according to claim 8, is characterized in that, also comprises frequency converter and power amplifier:
The output of described input numerical control attenuation units connects the input of described frequency converter, the output of described frequency converter connects the input of described output numerical control attenuation units, the output of described output numerical control attenuation units connects the input of described power amplifier, the output of described power amplifier connects described power coupling sampling unit, and described control unit connects described power amplifier;
Or described input numerical control attenuation units and described output numerical control attenuation units and described frequency converter are arranged at one, described power coupling sampling unit and described power amplifier are arranged at one, and described control unit connects described power amplifier.
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| CN201210400960.8A CN102916708B (en) | 2012-10-19 | 2012-10-19 | Power adjustment device of radio emitter and radio emitter |
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| CN201210400960.8A CN102916708B (en) | 2012-10-19 | 2012-10-19 | Power adjustment device of radio emitter and radio emitter |
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| CN102916708A CN102916708A (en) | 2013-02-06 |
| CN102916708B true CN102916708B (en) | 2014-11-26 |
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| CN109462382B (en) * | 2018-10-26 | 2022-07-29 | 京信网络***股份有限公司 | Power amplification system, power measurement and control method, device and base station equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944958A (en) * | 2010-08-27 | 2011-01-12 | 北京中科飞鸿科技有限公司 | Wideband multicarrier adaptive radio frequency interference system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0837434A (en) * | 1994-07-25 | 1996-02-06 | Oki Electric Ind Co Ltd | Output power control circuit and antenna multicoupler for mobile communication equipment |
| JPH1188084A (en) * | 1997-09-05 | 1999-03-30 | Toshiba Corp | Base station device for simple portable telephone system |
| JP4554969B2 (en) * | 2004-03-26 | 2010-09-29 | 富士通コンポーネント株式会社 | Automatic adjustment system, automatic adjustment device, and gain adjustment method |
| CN101141805B (en) * | 2007-02-27 | 2012-02-08 | 中兴通讯股份有限公司 | Radio frequency signal generating and radio frequency power testing apparatus and power detecting method |
| JP5088131B2 (en) * | 2007-12-28 | 2012-12-05 | 富士通株式会社 | Power control circuit and power control method |
| CN201303322Y (en) * | 2008-09-17 | 2009-09-02 | 三维通信股份有限公司 | Power amplifier protective device for ultra high frequency (UHF) transmitter |
| CN101459955B (en) * | 2009-01-07 | 2010-09-08 | 华为终端有限公司 | Method, system and feedback equipment for terminal power detection |
-
2012
- 2012-10-19 CN CN201210400960.8A patent/CN102916708B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944958A (en) * | 2010-08-27 | 2011-01-12 | 北京中科飞鸿科技有限公司 | Wideband multicarrier adaptive radio frequency interference system |
Non-Patent Citations (2)
| Title |
|---|
| 李丹等.零中频CDMA射频发射机研究及设计实现.《无线通信技术》.2006,(第03期),全文. * |
| 零中频CDMA射频发射机研究及设计实现;李丹等;《无线通信技术》;20060930(第03期);全文 * |
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Denomination of invention: Power adjustment device of radio emitter and radio emitter Effective date of registration: 20150120 Granted publication date: 20141126 Pledgee: Industrial Commercial Bank of China Ltd Zhongguancun Beijing branch Pledgor: Zhongke Feihong Science and Technology Co., Ltd., Beijing Registration number: 2015990000050 |
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