CN201435726Y - Portable wireless transmitting multi-frequency interferometer - Google Patents
Portable wireless transmitting multi-frequency interferometer Download PDFInfo
- Publication number
- CN201435726Y CN201435726Y CN2009201425107U CN200920142510U CN201435726Y CN 201435726 Y CN201435726 Y CN 201435726Y CN 2009201425107 U CN2009201425107 U CN 2009201425107U CN 200920142510 U CN200920142510 U CN 200920142510U CN 201435726 Y CN201435726 Y CN 201435726Y
- Authority
- CN
- China
- Prior art keywords
- frequency
- capacitor
- locked loop
- processing unit
- central processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Transmitters (AREA)
- Transceivers (AREA)
Abstract
A portable wireless transmitting multi-frequency interferometer comprises a signal gathering portion and a transmitting portion. The actual and effective working frequency points and frequency of a cell phone are swept and gathered in a known working bandwidth, thereby saving radio frequency energy, a center processor analyzes and controls the working frequency points and the frequency, and otherfrequency points and frequency bands which do not accord with requirements are not disturbed. The portable wireless transmitting multi-frequency interferometer greatly reduces the radiation of microwave to human bodies in the same distance when guaranteeing the disturbance effect, lightens the electromagnetic radiation pollution to periphery, lowers power consumption, lightens weight, reduces thedesign of volume, and lightens instrument, thereby widening the use range of instruments.
Description
Technical field
The utility model belongs to communication technique field, is specifically related to the method for wireless transmission multifrequency interferometer and shielding cell phone signal.
Background technology
At present, departments such as public security use to all kinds of mobile phone signal shielding modes, be whole frequency bands interval at known operating handset, adopt the continuous sweep mode to disturb, this mode needs powerful radio-frequency (RF) energy, and volume is big, Heavy Weight, in explosion-proof explosive environment, move inconvenient, restricted the scope of application of instrument, long time continuous working, strong microwave radiation human body, be harmful to health and periphery is produced electromagnetic radiation pollution, also can produce and disturb some civilian broadcast band.
Summary of the invention;
The purpose of this utility model provides a kind of new method and a kind of portable mobile wireless emission multifrequency interferometer that shields the cell phone signal.
The utility model signal shielding method is as follows: at first to the frequency-swept in the mobile phone service area, gather true useful effective frequency and the frequency band of mobile phone,, only gather the useful effective Frequency point in the service area GSM standard mobile phone, frequency acquisition section 930MHZ-960MHZ, 1800MHZ-1880MHZ.By central processing unit analysis and control, all the other undesirable Frequency points are not disturbed, can save a large amount of radio-frequency (RF) energy like this.Equally, to IS-95CDMA, W-CDMA among the 3G, CDMA 2000, SD-CDMA type mobile phone, same 869MHZ-894MHZ in present stage known bandwidth of operation, the 1880MHZ-2400MHZ frequency sweep is gathered the mobile phone actual operating frequency, carries out specific aim and disturbs, to save radio-frequency (RF) energy, by central processing unit analysis and control, all the other undesirable frequency bands are not disturbed.
The utility model signal shielding method specifically adopts following steps:
1, central processing unit U3 sets the frequency that receives local oscillator phase-locked loop U4 by data/address bus, receive local oscillator phase-locked loop U4 by resistance R 3 control reference oscillator VCO1 output reference frequencies, arrive DDS direct synthesizer U5 as reference frequency by capacitor C 5, output to front-end processor U1 by C6 simultaneously, as the down-conversion benchmark.
2, central processing unit U3 according to program setting send needs and gather the IF-FRE control data of frequency correspondence of frequency sweep to the direct frequency changer U5 of DDS, the direct frequency changer U5 output of DDS receiving intermediate frequency signal is to front-end processor U1, the signal that reception antenna ANT1 receives enters front-end processor U1 through traffic filter BPF1, front-end processor UI exports intermediate-freuqncy signal to capacitor C 1 according to the reference frequency of reference oscillator VC01 and local oscillator intermediate-freuqncy signal and the antenna input signal of the direct frequency changer U5 of DDS, the intermediate-freuqncy signal of capacitor C 1 output outputs to if demodulator U2 through intermediate frequency filtering BPF2 and capacitor C 2, if demodulator U2 carries out automatic gain control through resistance R 2 to front-end processor U1 according to intermediate-freuqncy signal intensity output AGC automatic gaining controling signal, and if demodulator U2 demodulates the RSSI field intensity signal simultaneously, I, the Q modulation signal is to central processing unit U3.
3, central processing unit U3 calculates current signal and record according to the intermediate-freuqncy signal of the current RSSI field intensity signal that obtains, I, Q modulation signal and the direct frequency changer U5 output of the DDS that sets.
4, repeat 1～3 process and finish frequency and the collection of bandwidth frequency sweep that sets up to central processing unit U3.
5, central processing unit U3 finishes by the collection of interface unit U9 notice external equipment frequency sweep, and waits for that external equipment provides enabling signal.
6, after external equipment begins emission by interface unit U9 notice central processing unit U3, central processing unit U3 is provided with the local frequency of up-conversion phase-locked loop U8 by data/address bus, up-conversion phase-locked loop U8 exports the up-conversion local oscillators to upconverter U6 through resistance R 4 control up-conversion local oscillator VC02, upconverter U6 is by capacitor C 8 feedback U8, and central processing unit U3 is provided with the direct frequency changer U5 output of DDS up-conversion intermediate-freuqncy signal to upconverter U6 according to the signal of signal that is write down or setting simultaneously.Signal after upconverter U6 output up-conversion is synthetic outputs to traffic filter BPF3 through capacitor C 9, signal enters power amplifier U7 and amplifies after filter BPF3 filtering, the power signal after the amplification outputs to transmitting antenna ANT2 emission by isolator BPF4.
Portable mobile wireless emission multifrequency interferometer of the present utility model is made up of signals collecting part and radiating portion, signals collecting mainly comprises antenna ANT1, traffic filter BPF1, signal front-end processing device U1, reference oscillator VCO1, reception local oscillator phase-locked loop U4, direct synthesizer U5, intermediate-frequency filter BPF2, intermediate frequency demodulation U2, central processing unit U3;
Central processing unit U3 is connected with local oscillator phase-locked loop U4 by data/address bus, receiving local oscillator phase-locked loop U4 is connected with reference oscillator VCO1 by resistance R 3, the output reference frequency, be connected with direct synthesizer (DDS) U5 by capacitor C 5, be connected to front-end processor U1 by capacitor C 6 simultaneously, front-end processor U1 is connected with reception antenna ANT1 by traffic filter BPF1.Front-end processor U1 is connected with filter BPF2 by capacitor C 1 and earth resistance R1, front-end processor U1 also and be provided with resistance R 2 and capacitor C 3 between the if demodulator U2, if demodulator U2 demodulates RSSI field intensity signal, I, Q modulation signal and is connected with central processing unit U3 simultaneously.Central processing unit U3 also is connected with interface unit U9.
Radiating portion comprises up-conversion local oscillator VCO2, up-conversion phase-locked loop U8, upconverter U6, output signal filtering BPF3, power amplifier U7, output isolator BPF4, transmitting antenna ANT2, central processing unit U3 is connected with frequency conversion phase-locked loop U8 by data/address bus, up-conversion phase-locked loop U8 connects up-conversion local oscillator VC02 through resistance R 4 and capacitor C 10, upconverter U6 connects frequency conversion phase-locked loop U8 by capacitor C 8 feedbacks, up-conversion local oscillator VC02 is connected the back with upconverter U6 and is connected with power amplifier U7 and transmitting antenna ANT2 with filter BPF 3 by capacitor C 9.
The utility model is in known bandwidth of operation, and frequency sweep is gathered mobile phone actual effectively working frequency points and frequency, saving radio-frequency (RF) energy, by central processing unit analysis and control all the other undesirable frequencies and frequency band is not disturbed.In guaranteeing interference effect same equidistant, significantly reduced the radiation of microwave to human body, alleviate peripheral electromagnetic radiation pollution, reduce power consumption like this, weight reduction, the design of reduced volume can make the instrument lightness, thereby has expanded the scope of application of instrument.
Description of drawings
Accompanying drawing is the utility model circuit diagram.
Embodiment
The utility model portable mobile wireless emission multifrequency interferometer concrete structure as shown in drawings, form by signals collecting part and radiating portion, signals collecting mainly comprises antenna ANT1, traffic filter BPF1, signal front-end processing device U1, reference oscillator VCO1, reception local oscillator phase-locked loop U4, direct synthesizer U5, intermediate-frequency filter BPF2, intermediate frequency demodulation U2, central processing unit U3;
Central processing unit U3 is connected with local oscillator phase-locked loop U4 by data/address bus, receiving local oscillator phase-locked loop U4 is connected with reference oscillator VCO1 by R3, the output reference frequency, be connected with direct synthesizer (DDS) U5 by capacitor C 5, be connected to front-end processor U1 by capacitor C 6 simultaneously, front-end processor U1 is connected with reception antenna ANT1 by traffic filter BPF1.Front-end processor U1 is connected with filter BPF2 by capacitor C 1 and earth resistance R1, front-end processor U1 also and be provided with resistance R 2 and capacitor C 3 between the if demodulator U2, if demodulator U2 demodulates RSSI field intensity signal, I, Q modulation signal and is connected with central processing unit U3 simultaneously.Central processing unit U3 also is connected with interface unit U9.
Radiating portion comprises up-conversion local oscillator VCO2, up-conversion phase-locked loop U8, upconverter U6, output signal filtering BPF3, power amplifier U7, output isolator BPF4, transmitting antenna ANT2, central processing unit U3 is connected with frequency conversion phase-locked loop U8 by data/address bus, up-conversion phase-locked loop U8 connects up-conversion local oscillator VC02 through resistance R 4 and capacitor C 10, upconverter U6 connects frequency conversion phase-locked loop U8 by capacitor C 8 feedbacks, up-conversion local oscillator VC02 is connected the back with upconverter U6 and is connected with power amplifier U7 and transmitting antenna ANT2 with filter BPF3 by capacitor C 9.
The utility model signal shielding method is as follows: at first to the frequency-swept in the mobile phone service area, gather true useful effective frequency and the frequency band of mobile phone, to GSM standard mobile phone, only gather the useful effective frequency in the service area, the frequency acquisition section is 930MHZ-960MHZ, and 1800MHZ-1880MHZ is by central processing unit analysis and control, all the other undesirable frequencies are not disturbed, can save a large amount of radio-frequency (RF) energy like this.Equally, to IS-95CDMA, W-CDMA among the 3G, CDMA2000, SD-CDMA type mobile phone, same 869MHZ-894MHZ in present stage known bandwidth of operation, the 1880MHZ-2400MHZ frequency sweep is gathered the mobile phone actual operating frequency, to save radio-frequency (RF) energy,, all the other undesirable frequency bands are not disturbed by central processing unit analysis and control.
Claims (1)
1, a kind of portable mobile wireless emission multifrequency interferometer, it is characterized in that: form by signals collecting part and radiating portion, signals collecting mainly comprises antenna ANT1, traffic filter BEP1, signal front-end processing device U1, reference oscillator VCO1, reception local oscillator phase-locked loop U4, direct synthesizer U5, traffic filter BPF2, intermediate frequency demodulation U2, central processing unit U3; Central processing unit U3 is connected with local oscillator phase-locked loop U4 by data/address bus, receiving local oscillator phase-locked loop U4 is connected with reference oscillator VCO1 by resistance R 3, the output reference frequency, be connected with direct synthesizer U5 by capacitor C 5, be connected to front-end processor U1 by capacitor C 6 simultaneously, front-end processor U1 is connected with reception antenna ANT1 by traffic filter BPF1.Front-end processor U1 is connected with filter BPF2 by capacitor C 1 and earth resistance R1, front-end processor U1 also and be provided with resistance R 2 and capacitor C 3 between the if demodulator U2, simultaneously if demodulator U2 demodulates RSSI field intensity signal, I, Q modulation signal and is connected with central processing unit U3, and central processing unit U3 also is connected with interface unit U9; Radiating portion comprises up-conversion local oscillator VCO2, up-conversion phase-locked loop U8, upconverter U6, output signal filtering BPF3, power amplifier U7, output isolator BPF4, transmitting antenna ANT2, central processing unit U3 is connected with frequency conversion phase-locked loop U8 by data/address bus, up-conversion phase-locked loop U8 connects up-conversion local oscillator VCO2 through resistance R 4 and capacitor C 10, upconverter U6 connects frequency conversion phase-locked loop U8 by capacitor C 8 feedbacks, up-conversion local oscillator VC02 is connected the back with upconverter U6 and is connected with power amplifier U7 and transmitting antenna ANT2 with filter BPF3 by capacitor C 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201425107U CN201435726Y (en) | 2009-04-22 | 2009-04-22 | Portable wireless transmitting multi-frequency interferometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201425107U CN201435726Y (en) | 2009-04-22 | 2009-04-22 | Portable wireless transmitting multi-frequency interferometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201435726Y true CN201435726Y (en) | 2010-03-31 |
Family
ID=42054540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201425107U Expired - Fee Related CN201435726Y (en) | 2009-04-22 | 2009-04-22 | Portable wireless transmitting multi-frequency interferometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201435726Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540615B (en) * | 2009-04-22 | 2013-05-22 | 陆贻东 | Method for shielding signals of mobile phone and portable wireless instrument for emitting multitone jamming |
| CN113055044A (en) * | 2021-03-30 | 2021-06-29 | 武汉深蓝电波电子科技有限公司 | Multi-band electronic countermeasure radio frequency transceiving method |
-
2009
- 2009-04-22 CN CN2009201425107U patent/CN201435726Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540615B (en) * | 2009-04-22 | 2013-05-22 | 陆贻东 | Method for shielding signals of mobile phone and portable wireless instrument for emitting multitone jamming |
| CN113055044A (en) * | 2021-03-30 | 2021-06-29 | 武汉深蓝电波电子科技有限公司 | Multi-band electronic countermeasure radio frequency transceiving method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203135865U (en) | Mobile terminal for alleviating interference of LTE (Long Term Evolution) emission in GPS (Global Position System) | |
| CN101540615B (en) | Method for shielding signals of mobile phone and portable wireless instrument for emitting multitone jamming | |
| CN205232209U (en) | Signal reception circuit, phased array antenna and trackside unit based on zero intermediate frequency | |
| RU2009139083A (en) | SECOND ORDER DISTORTION REDUCED BY SEARCHING THE SENDED SIGNAL | |
| DE602004008656D1 (en) | SUPERREGENERATIVE Q-QUENCHING RECEIVER | |
| CN112865832B (en) | Ground observation whistle ultrashort wave over-the-horizon information transmission equipment and transmission method | |
| CN205356695U (en) | GSM network MR measurement system | |
| CN201435726Y (en) | Portable wireless transmitting multi-frequency interferometer | |
| CN104202101A (en) | Short wave/ultra-short wave instant dynamic spectrum sensing system and method | |
| CN101431826A (en) | Cell carrier wave tracing method and system for GSM system | |
| CN104253628B (en) | Device is selected in a kind of shortwave prognosis | |
| CN214480596U (en) | Radio frequency assembly | |
| CN202334510U (en) | Transceiver for millimeter wave active personnel safety inspection device | |
| CN204272098U (en) | Shortwave frequency conversion channel | |
| CN103582103A (en) | Communication system and control circuit | |
| CN202364204U (en) | Examination room wireless signals shielding device | |
| CN205490529U (en) | Anti -interference digit transmission device of VHF | |
| CN109257056A (en) | A kind of digital if receiver | |
| CN205195658U (en) | Up -conversion circuit | |
| CN213461730U (en) | Miniaturized low-power consumption receiver | |
| CN212785350U (en) | High-sensitivity 5GHz wireless transceiving module | |
| CN1959697A (en) | Long-range card read head for ID cards in mid frequency and in radio frequency | |
| CN201766580U (en) | Device and equipment for improving efficiency of built-in antenna | |
| CN206835067U (en) | A kind of Miniaturized multiband RDSS radio-frequency modules | |
| CN106301445B (en) | A kind of aviation UHF band reception circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100331 Termination date: 20130422 |