CN204376886U - Broadband receiver - Google Patents
Broadband receiver Download PDFInfo
- Publication number
- CN204376886U CN204376886U CN201520121053.9U CN201520121053U CN204376886U CN 204376886 U CN204376886 U CN 204376886U CN 201520121053 U CN201520121053 U CN 201520121053U CN 204376886 U CN204376886 U CN 204376886U
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- attenuator
- stage amplifier
- local oscillator
- frequency
- preselector
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Abstract
The utility model discloses broadband receiver, comprise controller, local oscillator and frequency mixer, described controller connects pre-attenuator, preselector, local oscillator, first stage amplifier and rearmounted attenuator simultaneously, pre-attenuator is wherein connected with preselector, first stage amplifier is connected with rearmounted attenuator, local oscillator is connected with frequency mixer, between preselector and first stage amplifier, also connect frequency mixer and prefilter successively, rearmounted attenuator also connects two-stage amplifier and postfilter successively.The utility model is by above-mentioned principle, and this broadband receiver operating frequency coverage is wide, and comprise medium wave, shortwave, ultrashort wave and part microwave, highly sensitive, measure error is little.
Description
Technical field
The utility model relates to twireless radio-frequency communication field, particularly, relates to broadband receiver.
Background technology
Radio-frequency technique has widely at wireless communication field, irreplaceable effect.Cable television system adopts radio frequency transmission mode.When wave frequency is lower than 100khz, electromagnetic wave can be absorbed by earth's surface, effective transmission can not be formed, but wave frequency higher than 100khz time, electromagnetic wave can be propagated in atmosphere, and through the ionospheric reflection of atmosphere outer rim, form long-distance transmissions ability, we become radio frequency the frequency electromagnetic waves with long-distance transmissions ability, are modulated by electric information source high-frequency current, form radiofrequency signal, through antenna transmission to aerial; Carry out counter modulation by after rf signal reception at a distance, be reduced into electric information source, this process is called wireless transmission.At present, it is 30 ~ 3000M that the ultra-short wave receiver frequency coverage of producing is insulted in common meeting, contains ultrashortly to involve part microwave; GSM-R receiver on railway, its frequency range is 885 ~ 889M, 930 ~ 934M; Wireless receive frequency is 88 ~ 108M; The frequency range of GSM, CDMA, 3G communication and bluetooth is all fixing little bandwidth frequency.These common receivers above, it is too narrow, too single all to sink into working frequency range, can only at the band operation of correspondence.
Utility model content
Technical problem to be solved in the utility model is to provide broadband receiver, and this broadband receiver operating frequency coverage is wide, and comprise medium wave, shortwave, ultrashort wave and part microwave, highly sensitive, measure error is little.
The technical scheme in the invention for solving the above technical problem is: broadband receiver, comprise controller, local oscillator and frequency mixer, described controller connects pre-attenuator, preselector, local oscillator, first stage amplifier and rearmounted attenuator simultaneously, pre-attenuator is wherein connected with preselector, first stage amplifier is connected with rearmounted attenuator, local oscillator is connected with frequency mixer, between preselector and first stage amplifier, also connect frequency mixer and prefilter successively, rearmounted attenuator also connects two-stage amplifier and postfilter successively.First stage amplifier wherein and two-stage amplifier are the roomy radio frequency amplifier of cover tape, local oscillator can cover large-scale frequency, phase-locked chip belt on controller is roomy, phase noise is high, volume is little, can receive bandwidth cover medium wave, shortwave, ultrashort wave and part microwave, avoid existing receiver occur working frequency range too narrow, too single, can only in the defect of the band operation of correspondence.The signal that this broadband receiver receives after treatment, after postfilter exports, also can connect A/D converter by signal digital, facilitate the later stage to carry out the real-time monitoring of signal.
In order to make the vibration bandwidth of broadband receiver larger, noise is little, and flatness is good, and described local oscillator is VCO oscillator.
Further, described local oscillator produces the scope of local oscillated signal between 300KHz-3GHz.Better can realize and radio frequency mixing, meet this reception mobile phone and the monitoring of medium wave, shortwave, ultrashort wave and part microwave is received.
Further, described prefilter is intermediate-frequency filter.The ripple received due to this receiver involves the wave band of below medium wave in being, be jamming incoherent signal, affect the definition of receiver Received signal strength for wave band more than medium wave, by its filtering, improves receiver to the sensitivity of receiving wave range.
Further, described pre-attenuator receives RF radiofrequency signal, frequency range is between 300KHz-3GHz.
To sum up, the beneficial effects of the utility model are:
1, the frequency coverage of this receiver is between 300KHz ~ 3000MHz, wherein contains medium wave, shortwave, ultrashort wave and part microwave, and receive frequency range is wider compared with existing receiver coverage, and working frequency range is more diversified.
2, this receiver full frequency band receiving sensitivity≤-130dBm, highly sensitive, and full frequency band level measurement error is within ± 3dB, and measure error is little.
3, the local oscillator of this receiver is VCO oscillator, and the vibration bandwidth of this oscillator is larger, noise is little, and flatness is good.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but execution mode of the present utility model is not limited thereto.
Embodiment 1:
As shown in Figure 1, the utility model comprises controller, local oscillator and frequency mixer, described controller connects pre-attenuator, preselector, local oscillator, first stage amplifier and rearmounted attenuator simultaneously, pre-attenuator is wherein connected with preselector, first stage amplifier is connected with rearmounted attenuator, local oscillator is connected with frequency mixer, between preselector and first stage amplifier, also connect frequency mixer and prefilter successively, rearmounted attenuator also connects two-stage amplifier and postfilter successively.
The local oscillated signal that local oscillator produces and pre-attenuator receive the signal of radiofrequency signal RF after preselector preliminary election of coming and carry out mixing, adopt prefilter filtering spurious signal, again the intermediate-freuqncy signal obtained is amplified by first stage amplifier, double conversion is carried out again by rearmounted attenuator, and carry out filter and amplification by two-stage amplifier and postfilter, be fixed intermediate-freuqncy signal and export.
First stage amplifier wherein and two-stage amplifier are the roomy radio frequency amplifier of cover tape, local oscillator can cover large-scale frequency, phase-locked chip belt on controller is roomy, phase noise is high, volume is little, this receiver can receive bandwidth cover medium wave, shortwave, ultrashort wave and part microwave, avoid existing receiver occur working frequency range too narrow, too single, can only in the defect of the band operation of correspondence.The signal that this broadband receiver receives after treatment, after postfilter exports, also can connect A/D converter by signal digital, facilitate the later stage to carry out the real-time monitoring of signal.In addition, draw through a large amount of result of the tests, this receiver full frequency band receiving sensitivity≤-130dBm, highly sensitive, full frequency band level measurement error is within ± 3dB, and measure error is little.
Embodiment 2:
The present embodiment is preferably as follows on the basis of embodiment 1: local oscillator is VCO oscillator.This oscillator vibrates bandwidth is larger, and noise is little, and flatness is good.
Local oscillator produces the scope of local oscillated signal between 300KHz-3GHz.This scope is best coverage.Prefilter is intermediate-frequency filter, and pre-attenuator receives RF radiofrequency signal, frequency range is between 300KHz-3GHz.
Local oscillator produces and covers the signal that the local oscillated signal of 300KHz ~ 3GHz and pre-attenuator receive 300KHz ~ 3GHz that the radiofrequency signal RF that comes obtains after preselector preliminary election and carry out mixing, adopt the intermediate-frequency filter filtering spurious signal of high squareness factor, again the intermediate-freuqncy signal obtained is amplified by first stage amplifier, double conversion is carried out again by rearmounted attenuator, and carry out filter and amplification by two-stage amplifier and postfilter, be fixed intermediate-freuqncy signal to export, coordinate AD by intermediate-freuqncy signal digitized processing again, to realize carrying out Real-Time Monitoring to the radiofrequency signal of 300KHz ~ 3GHz.
The above; it is only preferred embodiment of the present utility model; not do any pro forma restriction to the utility model, every any simple modification, equivalent variations done above embodiment according to technical spirit of the present utility model, all falls within protection range of the present utility model.
Claims (5)
1. broadband receiver, it is characterized in that, comprise controller, local oscillator and frequency mixer, described controller connects pre-attenuator, preselector, local oscillator, first stage amplifier and rearmounted attenuator simultaneously, pre-attenuator is wherein connected with preselector, first stage amplifier is connected with rearmounted attenuator, local oscillator is connected with frequency mixer, between preselector and first stage amplifier, also connect frequency mixer and prefilter successively, rearmounted attenuator also connects two-stage amplifier and postfilter successively.
2. broadband receiver according to claim 1, is characterized in that, described local oscillator is VCO oscillator.
3. broadband receiver according to claim 1, is characterized in that, described local oscillator produces the scope of local oscillated signal between 300KHz-3GHz.
4. broadband receiver according to claim 1, is characterized in that, described prefilter is intermediate-frequency filter.
5. broadband receiver according to claim 1, is characterized in that, described pre-attenuator receives RF radiofrequency signal, frequency range is between 300KHz-3GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520121053.9U CN204376886U (en) | 2015-03-02 | 2015-03-02 | Broadband receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520121053.9U CN204376886U (en) | 2015-03-02 | 2015-03-02 | Broadband receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204376886U true CN204376886U (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520121053.9U Active CN204376886U (en) | 2015-03-02 | 2015-03-02 | Broadband receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204376886U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896269A (en) * | 2015-12-18 | 2017-06-27 | 苏州普源精电科技有限公司 | A kind of spectrum analyzer for improving sensitivity |
-
2015
- 2015-03-02 CN CN201520121053.9U patent/CN204376886U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896269A (en) * | 2015-12-18 | 2017-06-27 | 苏州普源精电科技有限公司 | A kind of spectrum analyzer for improving sensitivity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |