CN205105200U - Portable sonde receiver radio frequency front end circuit - Google Patents
Portable sonde receiver radio frequency front end circuit Download PDFInfo
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- CN205105200U CN205105200U CN201520805916.4U CN201520805916U CN205105200U CN 205105200 U CN205105200 U CN 205105200U CN 201520805916 U CN201520805916 U CN 201520805916U CN 205105200 U CN205105200 U CN 205105200U
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- portable
- sonde
- radio frequency
- end circuit
- frequency front
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- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The utility model provides a portable sonde receiver radio frequency front end circuit, include: the low -noise amplifier, radio frequency filter, first detector, IF filter, controllable gain amplifier, wave detector and the operational amplifier that connect of electricity in proper order. The utility model discloses improved the consumption of sonde receiver, sensitivity is higher, and the more weak meteorological signal of ability receiving process, detection range obtain improving, the integrated level is high, small light in weight, and suitable personnel carry, use with the cooperation of up -to -date style GPS sonde, and are portable good.
Description
Technical field
The present invention relates to the reception process of receiver radio frequency front-end circuit field, particularly superfrequency (UHF) meteorological frequency range sonde signal.
Background technology
In recent years, also with the environmental problem that some merit attention while rapid economic development, wherein the problem of Climate and Environment Variation causes each side and pays close attention to widely.The weather conditions such as global warming, anti-season weather, local burst fire-disaster bring tremendous influence to people's life at ordinary times, not only cause serious economic loss, also threaten the security of the lives and property of the mankind.In order to reduce the impact of meteorological disaster, the measure of properly protecting in advance is very important, and this just requires to carry out weather forecast accurately.And the data message of aerological sounding, not only affect daily weather forecast and climatic analysis, and in national defense and military and the development of the national economy, also take on important role.Nowadays the ground location equipment of China is mainly based on fixed station standing posture and vehicular, and equipment is mostly the main equipment such as meteorological radar, radio theodolite, and it is much bigger that the development of this kind equipment and the cost of update compare sonde.The development of sonde technology, has higher requirement to the performance of ground receiving equipment.Can the performance quality of receiving system, be related to and effectively receive meteorological data, and the accuracy of meteorological data data directly can affect the quality of related application service.Compare station formula and vehicular equipment, portable receiver development tolls is relatively little, and applicable personnel carry, there are station formula and the incomparable mobility of vehicular, are applicable to some special occasions such as transmitting and the mountain area disaster relief of rain making, guided missile.
Existing portable sonde receiver and L-band the digital meteorological sounding meter with the use of, detection range is far away not, and precision is not high.Along with domestic GPS sonde successful development and progressively promote the use of, adopt GPS location after, it is farther that detection range also becomes, and the performance such as sensitivity, power consumption, gain of receiver also needs further improvement.
Summary of the invention
The object of this invention is to provide that a kind of integrated level is high, volume is little, the better radio-frequency (RF) front-end circuit system of performance such as sensitivity and power consumption, can with up-to-date domestic GPS sonde with the use of, the farther precision of detection range is higher.
The invention provides following technical scheme:
A kind of portable sonde receiver radio frequency front-end circuit, comprising: comprising: the low noise amplifier be electrically connected successively, radio-frequency filter, frequency mixer, intermediate-frequency filter, controllable gain amplifier, wave detector and operational amplifier.
The noise factor of described low noise amplifier is less than 1.5dB, and gain reaches 22dB.
Described radio-frequency filter is the band pass filter of high q-factor.
Frequency mixer is active mixer, can provide the gain of 10dB.
Described intermediate-frequency filter is if bandpas filter.
Described controllable gain control amplifier, wave detector and operational amplifier constitute automatic gain control circuit, and for faint incoming signal level, automatic gain control circuit can provide the gain of 35dB.
The invention has the beneficial effects as follows: the power consumption improving sonde receiver, sensitivity is higher, and can receive the meteorologic signal that process is fainter, detection range is improved; Integrated level is high, small in volume, and applicable personnel carry, with up-to-date GPS sonde with the use of, good portability.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is structure of radio-frequency front end figure;
Fig. 2 is radio-frequency front-end gain noise performance map; .
Fig. 3 is third order intermodulation Test input signal;
Fig. 4 is third order intermodulation test output signal;
Fig. 5 is high order harmonic component analysis result.
Embodiment
As Figure 1-5, the present invention discloses a kind of portable sonde receiver radio frequency front-end circuit, comprising: the low noise amplifier 1, radio-frequency filter 2, frequency mixer 3, intermediate-frequency filter 4, controllable gain amplifier 5, wave detector 6 and the operational amplifier 7 that are connected successively.
In the present embodiment, in receiver radio frequency front end, the noise factor of low noise amplifier 1 is less than 1.5dB, and gain reaches 22dB.Radio-frequency filter 2 is the band pass filter of high q-factor, requires that insertion loss is little, and the precipitous Out-of-band rejection in edge is large, can play enough inhibitory action to image frequency.Frequency mixer 3 plays the effect of down-conversion, is active mixer, can provides the gain of 10dB.Intermediate-frequency filter 4 is if bandpas filter, and insertion loss is little, and Out-of-band rejection performance is good.
Automatic gain control amplifier 5, wave detector 6 and operational amplifier 7 constitute automatic gain control circuit.For faint incoming signal level, automatic gain control circuit can provide the gain of 35dB, and when incoming signal level is higher, in order to the rated value making output level be no more than back-end circuit, automatic gain control circuit plays certain compression to gain.The gain size of controllable gain amplifier 5 is subject to the output voltage control of operational amplifier 7, the output signal of wave detector 6 pairs of controllable gain amplifiers 5 carries out detection, export a direct voltage, output voltage and the reference voltage of operational amplifier 7 pairs of wave detectors 6 compare, the gain size of the output voltage control controllable gain amplifier of operational amplifier 7.The automatic gain control circuit of automatic gain control amplifier 5, wave detector 6 and operational amplifier 7 composition, makes intermediate frequency power output remain in a stable scope.
Inventive receiver radio-frequency front-end, the signal received first is undertaken amplifying and noise reduction by low noise amplifier 1, carry out filtering process through radio-frequency filter 2 again, frequency mixer 3 pairs of signals carry out down-converted and provide fractionated gain, then obtain intermediate-freuqncy signal via intermediate-frequency filter 4 filtering.When the output signal of intermediate-frequency filter 4 is less, automatic control gain control section provides the gain of full-amount 35dB, and when intermediate-frequency filter 4 outputs signal larger, the gain of last automatic gain control circuit is compressed, and makes intermediate frequency stable output power at about 0dBm.
As shown in Figure 2, show radio-frequency front-end path, under varying input signal power situation, the gain of each several part circuit, power output and noise factor.
As shown in Figure 3, for testing input signal situation during whole front-end circuit third order intermodulation characteristic.
As shown in Figure 4, for testing input signal situation during whole front-end circuit third order intermodulation characteristic.
As shown in Fig. 5 five, be the analysis result of front-end circuit high order harmonic component, can find out except required IF-FRE, the suppression situation of other each harmonics is all very good.
To sum up, present invention improves the power consumption of sonde receiver, sensitivity is higher, and can receive the meteorologic signal that process is fainter, detection range is improved; Integrated level is high, small in volume, and applicable personnel carry, with up-to-date GPS sonde with the use of, good portability.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a portable sonde receiver radio frequency front-end circuit, is characterized in that, comprising: the low noise amplifier be electrically connected successively, radio-frequency filter, frequency mixer, intermediate-frequency filter, controllable gain amplifier, wave detector and operational amplifier.
2. portable sonde receiver radio frequency front-end circuit according to claim 1, it is characterized in that, the noise factor of described low noise amplifier is less than 1.5dB, and gain reaches 22dB.
3. portable sonde receiver radio frequency front-end circuit according to claim 1, it is characterized in that, described radio-frequency filter is the band pass filter of high q-factor.
4. portable sonde receiver radio frequency front-end circuit according to claim 1, it is characterized in that, frequency mixer is active mixer, can provide the gain of 10dB.
5. portable sonde receiver radio frequency front-end circuit according to claim 1, it is characterized in that, described intermediate-frequency filter is if bandpas filter.
6. portable sonde receiver radio frequency front-end circuit according to claim 1, it is characterized in that, described controllable gain control amplifier, wave detector and operational amplifier constitute automatic gain control circuit, for faint incoming signal level, automatic gain control circuit can provide the gain of 35dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805916.4U CN205105200U (en) | 2015-10-15 | 2015-10-15 | Portable sonde receiver radio frequency front end circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805916.4U CN205105200U (en) | 2015-10-15 | 2015-10-15 | Portable sonde receiver radio frequency front end circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205105200U true CN205105200U (en) | 2016-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520805916.4U Expired - Fee Related CN205105200U (en) | 2015-10-15 | 2015-10-15 | Portable sonde receiver radio frequency front end circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205105200U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105227196A (en) * | 2015-10-15 | 2016-01-06 | 南京信息工程大学 | Portable sonde receiver radio frequency front-end circuit |
-
2015
- 2015-10-15 CN CN201520805916.4U patent/CN205105200U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105227196A (en) * | 2015-10-15 | 2016-01-06 | 南京信息工程大学 | Portable sonde receiver radio frequency front-end circuit |
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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: 20160323 Termination date: 20171015 |
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| CF01 | Termination of patent right due to non-payment of annual fee |