CN107370503A - Receiving circuit for the measurement of S-band precipitation particles scattering experiment - Google Patents
Receiving circuit for the measurement of S-band precipitation particles scattering experiment Download PDFInfo
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- CN107370503A CN107370503A CN201710621554.7A CN201710621554A CN107370503A CN 107370503 A CN107370503 A CN 107370503A CN 201710621554 A CN201710621554 A CN 201710621554A CN 107370503 A CN107370503 A CN 107370503A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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Abstract
The invention discloses a kind of receiving circuit for the measurement of S-band precipitation particles scattering experiment, including first order adjustable gain amplification branch road, second level adjustable gain amplification branch road, RF signal gain amplifying circuit, local oscillation signal gain amplifying circuit and mixing and filtering circuit, the first order adjustable gain amplification branch road is connected with second level adjustable gain amplification branch road, second level adjustable gain amplification branch road is connected with RF signal gain amplifying circuit, and RF signal gain amplifying circuit and local oscillation signal gain amplifying circuit are connected with mixing and filtering circuit；The present invention has the characteristics of adjustable gain section, and the Larger Dynamic scope measurement received can be achieved, ensure that the different distance of precipitation particle measurement.
Description
Technical field
The present invention relates to radar detection field, more particularly to a kind of connecing for the measurement of S-band precipitation particles scattering experiment
Receive circuit.
Background technology
S-band precipitation particles scattering experiment measurement receiving circuit is the important composition portion of precipitation particles scatterometry system
Point, its major function is in laboratory, and the small-signal that S-band radar antenna receives is preselected, amplify, become
Frequently, filtering, demodulation digitized processing, while suppress outside interference, clutter and set noise, make echo-signal as far as possible
Target information is kept without distortion, further to carry out signal transacting and data processing.S-band precipitation particles scattering experiment is surveyed
The core for measuring receiving circuit is mixer, and it is according to local oscillator (LO) frequency, and the signal of reception is turned from radio frequency
Change to intermediate frequency.The effective information of reception signal is obtained by the processing to intermediate frequency, detection and analysis, so as to derive surveyed precipitation
The scattered information of particle.When radar emission circuit transmission 3GHz microwave signals run into precipitation particles, the signal of scattering needs to lead to
Cross radar receiving circuit its echo-signal is received and handled, to obtain precipitation target information, so as to be finally inversed by precipitation
The microphysics parameter of particle.Because the signal that radar antenna receives is fainter, it would be desirable to it is amplified, after amplification
Signal be easy to the processing in later stage, and have certain requirement to the level of reception signal in data processing, and believe for receiving
Number the unfixed feature of size, receiving circuit of the prior art can not make different size of signal be satisfied by receive will
Ask, compatibility is relatively low.
The content of the invention
The technical problems to be solved by the invention are to provide one kind for above-mentioned the deficiencies in the prior art to be used for S-band precipitation
The receiving circuit of α-particles scattering experiment measurement, this receiving circuit for being used for the measurement of S-band precipitation particles scattering experiment have gain
Adjustable feature, the Larger Dynamic scope measurement received can be achieved, ensure that the different distance of precipitation particle measurement.
To realize above-mentioned technical purpose, the technical scheme that the present invention takes is：
A kind of receiving circuit for the measurement of S-band precipitation particles scattering experiment, including first order adjustable gain amplification branch road, the
Two level adjustable gain amplification branch road, RF signal gain amplifying circuit, local oscillation signal gain amplifying circuit and mixing and filtering circuit,
The first order adjustable gain amplification branch road is connected with second level adjustable gain amplification branch road, the second level adjustable gain amplification
Branch road is connected with RF signal gain amplifying circuit, the RF signal gain amplifying circuit and local oscillation signal gain amplifying circuit
It is connected with mixing and filtering circuit；
The first order adjustable gain amplification branch road includes the first SP3T switch, the first low-noise amplifier, the second low noise
Acoustic amplifier, the first attenuator, the first gain amplifier, the first bandpass filter, the 3rd low-noise amplifier, the 4th low noise
Amplifier, the second attenuator, the second bandpass filter and the second SP3T switch, the pin of first SP3T switch
1 is connected with reception antenna by SMA connectors, and the pin 2 of first SP3T switch passes sequentially through the first low noise and put
Big device, the second low-noise amplifier, the first attenuator, the first gain amplifier and the first bandpass filter and the second SP3T
The pin 2 of switch is connected, and the pin 3 of first SP3T switch is connected with the pin 3 of second SP3T switch,
The pin 4 of first SP3T switch also passes sequentially through the 3rd low-noise amplifier, the 4th low-noise amplifier, second declined
Subtract device and the second bandpass filter to be connected with the pin 4 of the second SP3T switch；
Second level adjustable gain amplification branch road include the 3rd SP3T switch, the 3rd attenuator, the second gain amplifier,
3rd bandpass filter, the 4th attenuator and the 4th SP3T switch, the pin 1 and second of the 3rd SP3T switch
The pin 1 of SP3T switch connects, and the pin 2 of the 3rd SP3T switch passes sequentially through the 3rd attenuator, the second increasing
The pin 2 of beneficial amplifier and the 3rd bandpass filter the 4th SP3T switch is connected, and the 3rd SP3T switch are drawn
Pin 3 is connected with the pin 3 of the 4th SP3T switch, the pins 4 of the 3rd SP3T switch by the 4th attenuator with
The pin 4 of 4th SP3T switch connects, pin 1 and the RF signal gain amplifying circuit of the 4th SP3T switch
Connection.
As further improved technical scheme of the present invention, the RF signal gain amplifying circuit includes the 5th decay
Device, the 3rd gain amplifier and the 4th bandpass filter, described 5th one end of attenuator and drawing for the 4th SP3T switch
Pin 1 is connected, and the other end of the 5th attenuator is connected with the 3rd gain amplifier, the 3rd gain amplifier and the 4th band
Bandpass filter is connected, and the 4th bandpass filter is connected with mixing and filtering circuit.
As further improved technical scheme of the present invention, the local oscillation signal gain amplifying circuit is opened including single-pole double throw
Pass, the 6th attenuator, the 4th gain amplifier and the 5th bandpass filter, the pin 2 and pin 3 of the single-pole double-throw switch (SPDT) divide
SMA connectors are not connected with, and the pin 1 of the single-pole double-throw switch (SPDT) is connected with the 6th attenuator, the 6th attenuator and
Four gain amplifiers connect, and the 4th gain amplifier is connected with the 5th bandpass filter, the 5th bandpass filter and
Mixing and filtering circuit connects.
As further improved technical scheme of the present invention, the mixing and filtering circuit includes frequency mixer and LPF
Device, the 5th bandpass filter and the 4th bandpass filter are connected with frequency mixer, and the frequency mixer connects with low pass filter
Connect, the low pass filter is connected with SMA connectors.
As further improved technical scheme of the present invention, first low-noise amplifier and the second low-noise amplifier
Value of magnification be 8dB, the pad value of first attenuator is 3dB, and the value of magnification of first gain amplifier is 16dB,
The value of magnification of 3rd low-noise amplifier and the 4th low-noise amplifier is 8dB, the pad value of second attenuator
For 3dB.
As further improved technical scheme of the present invention, the pad value of the 3rd attenuator is 3dB, and described second increases
The value of magnification of beneficial amplifier is 16dB, and the pad value of the 4th attenuator is 8dB.
As further improved technical scheme of the present invention, there is provided the local oscillator to the local oscillation signal gain amplifying circuit is believed
Number it is 3.002GHz, the pad value of the 6th attenuator is 3dB, and the value of magnification of the 4th gain amplifier is 16dB.
As further improved technical scheme of the present invention, the radio frequency reception of the RF signal gain amplifying circuit reception
Signal is 3GHz, and the pad value of the 5th attenuator is 5 dB, and the value of magnification of the 3rd gain amplifier is 16dB.
The present invention compared with prior art, has the following advantages that：The present invention has the characteristics of adjustable gain section, passes through first
Level adjustable gain amplification branch road and second level adjustable gain amplification branch road can realize the Larger Dynamic scope measurement of reception, ensure that drop
The different distance of water particle measurement, different size of signal can be allowed to meet the requirement received, there is certain compatibility.The present invention
All it is to use passive device in terms of attenuator and wave filter, oneself design parameter, greatlys save cost.
Brief description of the drawings
Fig. 1 is the circuit theory schematic diagram of the present invention.
Fig. 2 is that the first order adjustable gain of the present invention amplifies the circuit theory schematic diagram of branch road.
Fig. 3 is that the second level adjustable gain of the present invention amplifies the circuit theory schematic diagram of branch road.
Fig. 4 is the circuit theory schematic diagram of the local oscillation signal gain amplifying circuit of the present invention.
Fig. 5 is the circuit theory schematic diagram of the mixing and filtering circuit of the present invention.
Fig. 6 is that path of the present invention selects control combination figure.
Embodiment
The embodiment of the present invention is further illustrated below according to Fig. 1 to Fig. 6：
When radar emission circuit transmission 3GHz microwave signals run into precipitation particles, the signal of scattering needs to receive electricity by radar
Road is received and handled to its echo-signal, to obtain precipitation target information, so as to be finally inversed by the microcosmic thing of precipitation particles
Manage parameter.The present invention discloses a kind of receiving circuit for the measurement of S-band precipitation particles scattering experiment, including the adjustable increasing of the first order
Benefit amplification branch road, the second level adjustable gain amplification branch road, RF signal gain amplifying circuit, local oscillation signal gain amplifying circuit and
Mixing and filtering circuit, the first order adjustable gain amplification branch road are connected with second level adjustable gain amplification branch road, and described second
Level adjustable gain amplification branch road is connected with RF signal gain amplifying circuit, the RF signal gain amplifying circuit and local oscillator letter
Number gain amplifying circuit is connected with mixing and filtering circuit；Referring to Fig. 1 and Fig. 2, the first order adjustable gain amplifies branch road bag
Include the first SP3T switch 3, the first low-noise amplifier 4, the second low-noise amplifier 5, the first attenuator 6, the first gain
Amplifier 7, the first bandpass filter 8, the 3rd low-noise amplifier 9, the 4th low-noise amplifier 10, the second attenuator 11,
The SP3T switch 13 of two band-pass filter 12 and second, the pin 1 of first SP3T switch 3 pass through SMA connectors 2
It is connected with reception antenna 1, it is low that the pins 2 of first SP3T switch 3 passes sequentially through the first low-noise amplifier 4, second
Noise amplifier 5, the first attenuator 6, the first gain amplifier 7 and the first bandpass filter 8 and the second SP3T switch 13
Pin 2 connect, the pin 3 of first SP3T switch 3 is connected with the pin 3 of second SP3T switch 13,
The pin 4 of first SP3T switch 3 also passes sequentially through the 3rd low-noise amplifier 9, the 4th low-noise amplifier 10,
Two attenuators 11 and the second bandpass filter 12 are connected with the pin 4 of the second SP3T switch 13；It is described referring to Fig. 1 or Fig. 3
Adjustable gain amplification branch road in the second level includes the 3rd SP3T switch 14, the 3rd attenuator 15, the second gain amplifier 16, the
Three bandpass filters 17, the 4th attenuator 18 and the 4th SP3T switch 19, the pin 1 of the 3rd SP3T switch 14
It is connected with the pin 1 of the second SP3T switch 13, the pin 2 of the 3rd SP3T switch 14 passes sequentially through the 3rd decay
The pin 2 of device 15, the second gain amplifier 16 and the SP3T switch 19 of the 3rd bandpass filter 17 the 4th connects, and the described 3rd
The pin 3 of SP3T switch 14 is connected with the pin 3 of the 4th SP3T switch 19, the 3rd SP3T switch 14
Pin 4 is connected by the 4th attenuator 18 with the pin 4 of the 4th SP3T switch 19, the 4th SP3T switch 19
Pin 1 is connected with RF signal gain amplifying circuit.
In the present embodiment, referring to Fig. 1, the RF signal gain amplifying circuit includes the 5th attenuator 20, the 3rd gain
The bandpass filter 22 of amplifier 21 and the 4th, one end of the 5th attenuator 20 and the pin 1 of the 4th SP3T switch 19
Connection, the other end of the 5th attenuator 20 is connected with the 3rd gain amplifier 21, the 3rd gain amplifier 21 and the
Four bandpass filters 22 are connected, and the 4th bandpass filter 22 is connected with mixing and filtering circuit.
In the present embodiment, referring to Fig. 1 or Fig. 4, the local oscillation signal gain amplifying circuit includes single-pole double-throw switch (SPDT) 23, the
Six attenuators 24, the 4th gain amplifier 25 and the 5th bandpass filter 26, the pin 2 and pin of the single-pole double-throw switch (SPDT) 23
3 are connected to SMA connectors 2, and the pin 1 of the single-pole double-throw switch (SPDT) 23 is connected with the 6th attenuator 24, and the described 6th declines
Subtract device 24 to be connected with the 4th gain amplifier 25, the 4th gain amplifier 25 is connected with the 5th bandpass filter 26, described
5th bandpass filter 26 is connected with mixing and filtering circuit.
In the present embodiment, referring to Fig. 1 or Fig. 5, the mixing and filtering circuit includes frequency mixer 27 and low pass filter 28, institute
State the 5th bandpass filter 26 and the 4th bandpass filter 22 is connected with frequency mixer 27, the frequency mixer 27 and low pass filter
28 connections, the low pass filter 28 are connected with SMA connectors 2.
In the present embodiment, the value of magnification of the low-noise amplifier 5 of the first low-noise amplifier 4 and second is 8dB, institute
The pad value for stating the first attenuator 6 is 3dB, and the value of magnification of first gain amplifier 7 is 16dB, and the 3rd low noise is put
The value of magnification of the big low-noise amplifier 10 of device 9 and the 4th is 8dB, and the pad value of second attenuator 11 is 3dB.
In the present embodiment, the pad value of the 3rd attenuator 15 is 3dB, the value of magnification of second gain amplifier 16
For 16dB, the pad value of the 4th attenuator 18 is 8dB.
In the present embodiment, local oscillation signal that the local oscillation signal gain amplifying circuit receives is 3.002GHz, the described 6th
The pad value of attenuator 24 is 3dB, and the value of magnification of the 4th gain amplifier 25 is 16dB.
In the present embodiment, radio frequency receiving signal that the RF signal gain amplifying circuit receives is 3GHz, the described 5th
The pad value of attenuator 20 is 5dB, and the value of magnification of the 3rd gain amplifier 21 is 16dB.
The present invention operation principle be：Signal passes through FPGA control after plank is entered via the input of reception antenna 1
Signal, gating carry out the passage of multistage amplification, may amplify the signal between -20dBm arrives -10dBm and enter frequency mixer 27, local oscillator afterwards
Signal enters frequency mixer 27, the signal after output mixing after being amplified to 10dBm, then by low pass filter 28, obtains required
Intermediate-freuqncy signal.
Specifically, referring to Fig. 2, first order adjustable gain amplification branch road：Because there is provided the first SP3T switch 3 and
Two SP3T switch 13, therefore it is divided into three tunnels, the first via is by the first low-noise amplifier 4 and the second low-noise amplifier 5
Prime, amplify 8dB, then after the first attenuators of 3dB 6 and the first gain amplifiers of 16dB 7, by the first bandpass filter
8 can realize about 26dB gain；Second tunnel is straight-through；3rd tunnel is also by the 3rd low-noise amplifier 9 and the 4th low noise amplification
Device 10 is prime, amplifies 8dB, then after 3dB the second attenuators 11 and the second bandpass filter 12, can be achieved about 9dB's
Gain.
Specifically, referring to Fig. 3, second level adjustable gain amplification branch road：Because there is provided the He of the 3rd SP3T switch 14
4th SP3T switch 19, therefore it is divided into three tunnels, the first via can realize about 9dB gain；Second tunnel is straight-through；3rd tunnel is real
Existing 8dB decay.
Specifically, referring to Fig. 4, local oscillation signal gain amplifying circuit：Local oscillation signal 3.002GHz is 0dBm entering fashionable, first
After 3dB decay and 16dB amplifications, then by the 5th bandpass filter 26 after, then 10dBm enters frequency mixer 27.This local oscillator is defeated
Enter end plus a single-pole double-throw switch (SPDT) 23 for the ease of being debugged to the local oscillation signal of different frequency, also allow in the debugging stage
Directly local oscillation signal is given with signal source to be debugged.
Specifically, mixing and filtering circuit：3.002GHz local oscillation signals are mixed to obtain 2MHz's with 3GHz radio frequency receiving signals
Intermediate-freuqncy signal, then by LPF output circuit, Digital Signal Processing is carried out into next stage.
If Fig. 6 is the path selection control that the receiving circuit that S-band precipitation particles scattering experiment measures corresponds to receiving power
Constitutional diagram.Because each SP3T switch are controlled with inputting 2 bit address code AB, 1A1B is represented first since input in figure
The control bit AB of SP3T switch 3, the like arrive 4A4B（That is the 4th SP3T switch 19）；If the signal received
For -55dBm, secondary series power bracket is selected（- 60, -50] address code, then whole system -10dBm or so is amplified to signal
Into mixing, corresponding different input power, adjustable gain is realized.
Protection scope of the present invention includes but is not limited to embodiment of above, and protection scope of the present invention is with claims
It is defined, any replacement being readily apparent that to those skilled in the art that this technology is made, deformation, improvement each fall within the present invention's
Protection domain.
Claims (8)
- A kind of 1. receiving circuit for the measurement of S-band precipitation particles scattering experiment, it is characterised in that：Including the adjustable increasing of the first order Benefit amplification branch road, the second level adjustable gain amplification branch road, RF signal gain amplifying circuit, local oscillation signal gain amplifying circuit and Mixing and filtering circuit, the first order adjustable gain amplification branch road are connected with second level adjustable gain amplification branch road, and described second Level adjustable gain amplification branch road is connected with RF signal gain amplifying circuit, the RF signal gain amplifying circuit and local oscillator letter Number gain amplifying circuit is connected with mixing and filtering circuit；The first order adjustable gain amplification branch road includes the first SP3T switch, the first low-noise amplifier, the second low noise Acoustic amplifier, the first attenuator, the first gain amplifier, the first bandpass filter, the 3rd low-noise amplifier, the 4th low noise Amplifier, the second attenuator, the second bandpass filter and the second SP3T switch, the pin of first SP3T switch 1 is connected with reception antenna by SMA connectors, and the pin 2 of first SP3T switch passes sequentially through the first low noise and put Big device, the second low-noise amplifier, the first attenuator, the first gain amplifier and the first bandpass filter and the second SP3T The pin 2 of switch is connected, and the pin 3 of first SP3T switch is connected with the pin 3 of second SP3T switch, The pin 4 of first SP3T switch also passes sequentially through the 3rd low-noise amplifier, the 4th low-noise amplifier, second declined Subtract device and the second bandpass filter to be connected with the pin 4 of the second SP3T switch；Second level adjustable gain amplification branch road include the 3rd SP3T switch, the 3rd attenuator, the second gain amplifier, 3rd bandpass filter, the 4th attenuator and the 4th SP3T switch, the pin 1 and second of the 3rd SP3T switch The pin 1 of SP3T switch connects, and the pin 2 of the 3rd SP3T switch passes sequentially through the 3rd attenuator, the second increasing The pin 2 of beneficial amplifier and the 3rd bandpass filter the 4th SP3T switch is connected, and the 3rd SP3T switch are drawn Pin 3 is connected with the pin 3 of the 4th SP3T switch, the pins 4 of the 3rd SP3T switch by the 4th attenuator with The pin 4 of 4th SP3T switch connects, pin 1 and the RF signal gain amplifying circuit of the 4th SP3T switch Connection.
- 2. the receiving circuit according to claim 1 for the measurement of S-band precipitation particles scattering experiment, it is characterised in that： The RF signal gain amplifying circuit includes the 5th attenuator, the 3rd gain amplifier and the 4th bandpass filter, and described One end of five attenuators is connected with the pin 1 of the 4th SP3T switch, the other end of the 5th attenuator and the 3rd gain Amplifier is connected, and the 3rd gain amplifier is connected with the 4th bandpass filter, and the 4th bandpass filter is filtered with mixing Wave circuit connects.
- 3. the receiving circuit according to claim 2 for the measurement of S-band precipitation particles scattering experiment, it is characterised in that： The local oscillation signal gain amplifying circuit includes single-pole double-throw switch (SPDT), the 6th attenuator, the 4th gain amplifier and the 5th band logical Wave filter, the pin 2 and pin 3 of the single-pole double-throw switch (SPDT) are connected to SMA connectors, and the single-pole double-throw switch (SPDT) draws Pin 1 is connected with the 6th attenuator, and the 6th attenuator is connected with the 4th gain amplifier, the 4th gain amplifier and Five bandpass filters are connected, and the 5th bandpass filter is connected with mixing and filtering circuit.
- 4. the receiving circuit according to claim 3 for the measurement of S-band precipitation particles scattering experiment, it is characterised in that： The mixing and filtering circuit includes frequency mixer and low pass filter, the 5th bandpass filter and the 4th bandpass filter with Frequency mixer is connected, and the frequency mixer is connected with low pass filter, and the low pass filter is connected with SMA connectors.
- 5. the receiving circuit according to claim 1 for the measurement of S-band precipitation particles scattering experiment, it is characterised in that： The value of magnification of first low-noise amplifier and the second low-noise amplifier is 8dB, the pad value of first attenuator For 3dB, the value of magnification of first gain amplifier is 16dB, the 3rd low-noise amplifier and the 4th low-noise amplifier Value of magnification be 8dB, the pad value of second attenuator is 3dB.
- 6. the receiving circuit according to claim 1 for the measurement of S-band precipitation particles scattering experiment, it is characterised in that： The pad value of 3rd attenuator is 3dB, and the value of magnification of second gain amplifier is 16dB, the 4th attenuator Pad value is 8dB.
- 7. the receiving circuit according to claim 3 for the measurement of S-band precipitation particles scattering experiment, it is characterised in that： The local oscillation signal for being supplied to the local oscillation signal gain amplifying circuit is 3.002GHz, and the pad value of the 6th attenuator is 3dB, the value of magnification of the 4th gain amplifier is 16dB.
- 8. the receiving circuit according to claim 2 for the measurement of S-band precipitation particles scattering experiment, it is characterised in that： The radio frequency receiving signal that the RF signal gain amplifying circuit receives is 3GHz, and the pad value of the 5th attenuator is 5 DB, the value of magnification of the 3rd gain amplifier is 16dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710621554.7A CN107370503A (en) | 2017-07-27 | 2017-07-27 | Receiving circuit for the measurement of S-band precipitation particles scattering experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710621554.7A CN107370503A (en) | 2017-07-27 | 2017-07-27 | Receiving circuit for the measurement of S-band precipitation particles scattering experiment |
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| Publication Number | Publication Date |
|---|---|
| CN107370503A true CN107370503A (en) | 2017-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710621554.7A Pending CN107370503A (en) | 2017-07-27 | 2017-07-27 | Receiving circuit for the measurement of S-band precipitation particles scattering experiment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109031310A (en) * | 2018-08-16 | 2018-12-18 | 南京信息工程大学 | S-band precipitation particles scatterometry instrument, measuring system and measurement method |
| CN109709522A (en) * | 2019-02-28 | 2019-05-03 | 南京信息工程大学 | A kind of two waveband precipitation particles scattering experiment measurement reception circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024769A (en) * | 2015-06-25 | 2015-11-04 | 大唐移动通信设备有限公司 | Monitoring device |
| CN106788479A (en) * | 2017-03-17 | 2017-05-31 | 成都玖锦科技有限公司 | Mono-channel radio-frequency signal acquisition playback system |
| CN207218679U (en) * | 2017-07-27 | 2018-04-10 | 南京信息工程大学 | Receiving circuit for the measurement of S-band precipitation particles scattering experiment |
-
2017
- 2017-07-27 CN CN201710621554.7A patent/CN107370503A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024769A (en) * | 2015-06-25 | 2015-11-04 | 大唐移动通信设备有限公司 | Monitoring device |
| CN106788479A (en) * | 2017-03-17 | 2017-05-31 | 成都玖锦科技有限公司 | Mono-channel radio-frequency signal acquisition playback system |
| CN207218679U (en) * | 2017-07-27 | 2018-04-10 | 南京信息工程大学 | Receiving circuit for the measurement of S-band precipitation particles scattering experiment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109031310A (en) * | 2018-08-16 | 2018-12-18 | 南京信息工程大学 | S-band precipitation particles scatterometry instrument, measuring system and measurement method |
| CN109709522A (en) * | 2019-02-28 | 2019-05-03 | 南京信息工程大学 | A kind of two waveband precipitation particles scattering experiment measurement reception circuit |
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Address after: 210044 Ning six road, Pukou District, Nanjing, Jiangsu Province, No. 219 Applicant after: Nanjing University of Information Science and Technology Address before: No. 69, Jianye District, Jianye District, Nanjing, Jiangsu Applicant before: Nanjing University of Information Science and Technology |