CN109188371A - A kind of double frequency double reception antenna circuit structure of achievable indoor life detection - Google Patents
A kind of double frequency double reception antenna circuit structure of achievable indoor life detection Download PDFInfo
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- CN109188371A CN109188371A CN201811094566.XA CN201811094566A CN109188371A CN 109188371 A CN109188371 A CN 109188371A CN 201811094566 A CN201811094566 A CN 201811094566A CN 109188371 A CN109188371 A CN 109188371A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
- G01S13/347—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using more than one modulation frequency
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/35—Details of non-pulse systems
- G01S7/352—Receivers
- G01S7/354—Extracting wanted echo-signals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
- G01S7/415—Identification of targets based on measurements of movement associated with the target
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/0507—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves using microwaves or terahertz waves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
- A61B5/1113—Local tracking of patients, e.g. in a hospital or private home
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
- G01S7/034—Duplexers
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a kind of double frequency double reception antenna circuit structures of achievable indoor life detection, receiving antenna I connects power splitter IV, IV output end of power splitter serial band pass filter II, low-noise amplifier I and frequency mixer I all the way, another way serial band pass filter IV, low-noise amplifier II and frequency mixer II；II serial band pass filter VI of receiving antenna, low-noise amplifier III and frequency mixer III；Transmitting antenna Series power amplifier, power splitter III, power splitter III connect power splitter I and power splitter II；I input terminal of power splitter connects local oscillator I, and output end connects power splitter III all the way, and another way connects frequency mixer I through bandpass filter I；II input terminal of power splitter connects local oscillator II, and output end connects power splitter III all the way, and another way connects power splitter V；V output end of power splitter connects frequency mixer II through bandpass filter III all the way, and another way connects frequency mixer III through bandpass filter V.
Description
Technical field
The present invention relates to vital signs detecting, short distance positioning and double frequency circuit fields, and more specifically, it relates to one kind
The double frequency double reception antenna circuit structure of interior life detection can be achieved.
Background technique
Medical monitoring, auxiliary drive and the fields such as robot indoor navigation require to detect the vital sign of detected material
Information (including breathing and heartbeat) and short distance positioning information, its essence is the relative displacement information and distance that detect measured object
Information.In order to realize the two functions, microwave radar has without contacting measured object, high sensitivity, independent of illumination and wears
The saturating strong advantage of power [1].Nevertheless, single-frequency microwave radar still remains deficiency in terms of realizing short distance positioning, for reality
The ability of existing detection range, the signal of transmitting must have certain bandwidth, and the letter of single-frequency non-modulated continuous wave radar transmitting
Number do not have certain bandwidth, therefore, it is difficult to obtain the absolute distance information of measured target.Recently it is proposed that frequency modulation(PFM)
The radar arrangement of continuous wave combination single-frequency non-modulated continuous wave, which can be realized simultaneously vital signs detecting and short distance is fixed
Position, but the radar needs frequency modulation continuous wave and the two different signal sources of single-frequency non-modulated continuous wave, in receiver part
Divide and is also required to handle two different form of signal.This not only adds the design difficulty of radar and structure complexities, also enable letter
Number processing is more complicated.
Deficiency based on existing radar arrangement, it is necessary to propose the radar that a kind of structure is simpler, cost is cheaper
Structure, to realize vital signs detecting and short distance positioning.
[bibliography]
[1]Wang G,Gu C,Inoue T,et al.A Hybrid FMCW-Interferometry Radar for
Indoor Precise Positioning and Versatile Life Activity Monitoring[J].IEEE
Transactions on Microwave Theory&Techniques,2014,62(11):2812-2822.
Summary of the invention
Purpose of the invention is to overcome the shortcomings in the prior art, provides a kind of pair of achievable indoor life detection
Frequency double reception antenna circuit structure, only uses a form of signal source, simplifies while realizing vital signs detecting and short distance
Radar circuit structure from positioning；Two different form of signal and frequency modulation continuous wave are no longer separated in receiver section
Signal and single-frequency continuous wave signal simplify the complexity of signal processing.
The purpose of the present invention is what is be achieved through the following technical solutions.
The double frequency double reception antenna circuit structure of achievable indoor life detection of the invention, including receiving antenna I, reception
Antenna II and transmitting antenna,
The receiving antenna I is connected with power splitter IV, and IV output end of power splitter is divided into two-way, wherein successively going here and there all the way
It is associated with bandpass filter II, low-noise amplifier I and frequency mixer I, has in addition been sequentially connected in series bandpass filter IV, low noise all the way
Amplifier II and frequency mixer II, I output end of frequency mixer is connected separately with analog-digital converter I and analog-digital converter II, described
II output end of frequency mixer is connected separately with analog-digital converter III and analog-digital converter IV；
The receiving antenna II has been sequentially connected in series bandpass filter VI, low-noise amplifier III and frequency mixer III, described mixed
III output end of frequency device is connected separately with analog-digital converter V and analog-digital converter VI；
The transmitting antenna connects power amplifier, and the power amplifier is connected with power splitter III, the power splitter
III input terminal is connected separately with power splitter I and power splitter II；I input terminal of power splitter is connected with local oscillator I, and output end is divided into two
Road, wherein connecting III input terminal of power splitter all the way, another way is connected to I input terminal of frequency mixer through bandpass filter I；The function point
II input terminal of device is connected with local oscillator II, and output end is divided into two-way, wherein connecting III input terminal of power splitter all the way, another way connects function
Divide V input terminal of device；V output end of power splitter is divided into two-way, wherein being connected to frequency mixer II through bandpass filter III all the way
Input terminal, another way are connected to III input terminal of frequency mixer through bandpass filter V.
In receiving end, the frequency f of the generation of local oscillator I1The frequency f generated for 1.67GHz, local oscillator II2For 2.06GHz, generation
Two frequency signals are synthesized using power splitter III, are launched after power amplifier amplifies by transmitting antenna；
In receiving end 1, the reception signal 1 that receiving antenna I receives first passes through power splitter IV and is divided into two-way, passes through all the way
Frequency of heart is the bandpass filter II of 1.67GHz, and another way is the bandpass filter IV of 2.06GHz by centre frequency, later
It receives signal 1 to amplify through low-noise amplifier I and low-noise amplifier II respectively, is respectively 1.67GHz, 2.06GHz with frequency
Local oscillation signal be mixed；The mode that frequency mixer I and frequency mixer II are all made of orthogonal mixing generates the orthogonal base of two-way respectively
Band signal 1 and baseband signal 2；Baseband signal 1 is finally converted into digital letter using analog-digital converter I and analog-digital converter II
Number, baseband signal 2 is converted into digital signal using analog-digital converter III and analog-digital converter IV；
In receiving end 2, the reception signal 2 that receiving antenna II receives first passes through the band logical that centre frequency is 2.06GHz and filters
Wave device VI amplifies by low-noise amplifier III later, then be mixed with the local oscillation signal that frequency is 2.06GHz and generate two-way
Baseband signal 3 is finally converted into digital signal using analog-digital converter V and analog-digital converter VI by orthogonal baseband signal 3.
Compared with prior art, the beneficial effects brought by the technical solution of the present invention are as follows:
(1) signal of two frequencies of transmitter section of the present invention is all continuous wave, therefore can be produced using identical local oscillator
Raw signal, therefore can simplify the structure of transmitter section；In receiver section, without using two kinds of different forms of hardware separation
Signal, therefore also can simplify the structure of receiver, can so simplify the overall structure of radar.
(2) present invention is due to also reducing the complexity of signal processing without separating two different form of signal.
(3) present invention realizes that the core ideas of the radar is the signal for utilizing two local oscillators while generating two frequencies, and
The signal of two frequencies is launched simultaneously by transmitting antenna.Receive the signal of two frequencies simultaneously using receiving antenna I,
In order to which the signal to two frequencies is respectively processed, the signal of two frequencies is separated using filter and is mixed respectively,
Finally obtained baseband signal is handled, and then obtains vital sign parameter signals and range information.Simultaneously using receiving antenna II
Frequency f is received by bandpass filter2, by calculating the phase difference of baseband signal 2 and baseband signal 3, calculate the side of measured object
Parallactic angle.
Detailed description of the invention
Fig. 1 is the double frequency double reception antenna circuit structure schematic diagram that indoor life detection can be achieved in the present invention.
Specific embodiment
Illustrate technical solution of the present invention in order to clearer, the present invention will be further explained below with reference to the attached drawings.It is right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
His attached drawing.
The double frequency double reception antenna circuit structure of achievable indoor life detection of the invention, as shown in Figure 1, including receiving
Antenna I, receiving antenna II and transmitting antenna.
The receiving antenna I is connected with power splitter IV, and IV output end of power splitter is divided into two-way, wherein successively going here and there all the way
It is associated with bandpass filter II, low-noise amplifier I and frequency mixer I, has in addition been sequentially connected in series bandpass filter IV, low noise all the way
Amplifier II and frequency mixer II.The output end I of the frequency mixer I is connected with analog-digital converter I, and output end Q is connected with modulus and turns
Parallel operation II；The output end I of the frequency mixer II is connected with analog-digital converter III, and output end Q is connected with analog-digital converter IV.
The receiving antenna II has been sequentially connected in series bandpass filter VI, low-noise amplifier III and frequency mixer III, described mixed
The output end I of frequency device III is connected with analog-digital converter V, and output end Q is connected with analog-digital converter VI.
The transmitting antenna connects power amplifier, and the power amplifier input connects III output end of power splitter,
III input terminal of power splitter is connected separately with power splitter I and power splitter II.I input terminal of power splitter is connected with local oscillator I, defeated
Outlet is divided into two-way, wherein output terminals A connects III input terminal E of power splitter all the way, another output end B connects through bandpass filter I
It is connected to I input terminal J of frequency mixer.II input terminal of power splitter is connected with local oscillator II, and output end is divided into two-way, wherein exporting all the way
Hold III input terminal F of C connection power splitter, V input terminal of another output end D connection power splitter.V output end of power splitter is divided into
Two-way, wherein output end H through bandpass filter III is connected to II input terminal L of frequency mixer all the way, another output end G is filtered through band logical
Wave device V is connected to III input terminal N of frequency mixer.
In receiving end, the frequency f of the generation of local oscillator I1The frequency f generated for 1.67GHz, local oscillator II2For 2.06GHz, in order to the greatest extent
Amount reduces the residual phase noise of baseband signal after mixing, drives two signal sources using same crystal oscillator.Two frequencies generated
Rate signal is synthesized using power splitter III, is launched after power amplifier amplifies by transmitting antenna.In receiving end 1, connect
The reception signal 1 that receipts antenna I receives first passes through power splitter IV and divides the signal into two-way, is by centre frequency all the way
The bandpass filter II of 1.67GHz, the bandpass filter IV that another way is 2.06GHz by centre frequency lead to each receive
The signal of a frequency is contained only in road.Signal 1 is received later to put through low-noise amplifier I and low-noise amplifier II respectively
Greatly, it is mixed respectively with the local oscillation signal that frequency is 1.67GHz, 2.06GHz.In order to solve Zeroes, frequency mixer I and mixed
The mode that frequency device II is all made of orthogonal mixing generates the orthogonal baseband signal 1 and baseband signal 2 of two-way respectively.Finally utilize modulus
Baseband signal 1 is converted into digital signal by converter I and analog-digital converter II, utilizes analog-digital converter III and analog-digital converter IV
Baseband signal 2 is converted into digital signal.In receiving end 2, the reception signal 2 that receiving antenna II receives first passes through centre frequency
For the bandpass filter VI of 2.06GHz, amplify later by low-noise amplifier III, then believes with frequency for the local oscillator of 2.06GHz
It number carries out mixing and generates the orthogonal baseband signal 3 of two-way, finally believed base band using analog-digital converter V and analog-digital converter VI
Numbers 3 are converted into digital signal.
The present invention realizes that the core ideas of the radar is the signal for utilizing two local oscillators while generating two frequencies, and passes through
Transmitting antenna launches the signal of two frequencies simultaneously.Receive the signal of two frequencies simultaneously using receiving antenna I, in order to
The signal of two frequencies is respectively processed, separate the signal of two frequencies using filter and is mixed respectively, finally
Obtained baseband signal is handled, and then obtains vital sign parameter signals and range information.Using receiving antenna II and by
Bandpass filter receives frequency f2, by calculating the phase difference of baseband signal 2 and baseband signal 3, calculate the azimuth of measured object.
The mode that vital signs detecting is realized is specific as follows.Ignore amplitude variation, if transmitting signal T (t) such as formula (1) institute
Show:
T (t)=cos (2 π ft+ φ (t)) (1)
In formula (1), f is the frequency for emitting signal, and t is the time, and φ (t) is initial phase.The chest cavity movement of people can be right
Emit signal and generate modulating action, and makes to emit signal generation reflection.The reflection letter that receiving antenna I and receiving antenna II receive
Number R (t) (i.e. reception signal 1 and receive signal 2) is as shown in formula (2):
In formula (2), d0For the distance between radar and measured object, x (t) is the chest cavity movement of human body, and c is signal propagation
Speed, λ=c/f be emit signal wavelength, φ (t-2d0/ c) it is residual phase.
After reflecting signal R (t) mixing orthogonal with local oscillation signal, the baseband signal B in the obtained channel I and QI(t) and BQ(t)
As shown in formula (3):
In formula (3), (4), Δ φ (t) is residual phase.
Vital sign parameter signals are extracted using complex signal demodulation method, the complex signal S (t) of reconstruction is as shown in formula (5):
The implementation of short distance positioning is as follows.When the working frequency of the dual-frequency radar is f1And f2When, enable baseband signal 1
Phase with baseband signal 2 is respectivelyWithThe range information D (t) of calculating is as shown in formula (6):
In formula (6), m be to apart from relevant integer, RmaxIt is maximum fuzzy distance.
The phase for enabling baseband signal 2 and 3 is respectivelyWithSince the frequency of the two is identical, wavelength is set as λ, is received
The horizontal distance of antenna I and receiving antenna II is d, then shown in azimuthal calculation formula such as formula (7):
Embodiment:
The model of specifically used component is described below in the present invention, and local oscillator I and local oscillator II are all made of Analog
The LTC6948IUFD of Devices company generates two frequencies of 1.67GHz and 2.06GHz using the local oscillator；Power splitter I, function point
Device II, power splitter III, power splitter IV are all made of the PD0922J5050S2HF of Anaren company；The bandpass filter I of 1.67GHz
The TQQ7303 of TriQuint company is all made of with bandpass filter II；The bandpass filter III of 2.06GHz, bandpass filter IV,
Bandpass filter V and bandpass filter VI are all made of the 856738 of TriQuint company；Low-noise amplifier I, low noise amplification
Device II, low-noise amplifier III are all made of the HMC618ALP3ETR of Analog Devices company；Frequency mixer I, II and of frequency mixer
Frequency mixer III is all made of the LT5575EUF of Analog Devices company.
Although function and the course of work of the invention are described above in conjunction with attached drawing, the invention is not limited to
Above-mentioned concrete function and the course of work, the above mentioned embodiment is only schematical, rather than restrictive, ability
The those of ordinary skill in domain under the inspiration of the present invention, is not departing from present inventive concept and scope of the claimed protection situation
Under, many forms can also be made, all of these belong to the protection of the present invention.
Claims (2)
1. a kind of double frequency double reception antenna circuit structure of achievable indoor life detection, which is characterized in that including receiving antenna
I, receiving antenna II and transmitting antenna,
The receiving antenna I is connected with power splitter IV, and IV output end of power splitter is divided into two-way, wherein being sequentially connected in series all the way
Bandpass filter II, low-noise amplifier I and frequency mixer I, have in addition been sequentially connected in series bandpass filter IV, low noise amplification all the way
Device II and frequency mixer II, I output end of frequency mixer are connected separately with analog-digital converter I and analog-digital converter II, the mixing
II output end of device is connected separately with analog-digital converter III and analog-digital converter IV；
The receiving antenna II has been sequentially connected in series bandpass filter VI, low-noise amplifier III and frequency mixer III, the frequency mixer
III output end is connected separately with analog-digital converter V and analog-digital converter VI；
The transmitting antenna connects power amplifier, and the power amplifier is connected with power splitter III, and the power splitter III is defeated
Enter end and is connected separately with power splitter I and power splitter II；I input terminal of power splitter is connected with local oscillator I, and output end is divided into two-way,
III input terminal of power splitter is wherein connected all the way, and another way is connected to I input terminal of frequency mixer through bandpass filter I；The power splitter
II input terminal is connected with local oscillator II, and output end is divided into two-way, wherein connecting III input terminal of power splitter all the way, another way connects function point
V input terminal of device；V output end of power splitter is divided into two-way, wherein it is defeated to be connected to frequency mixer II through bandpass filter III all the way
Enter end, another way is connected to III input terminal of frequency mixer through bandpass filter V.
2. the double frequency double reception antenna circuit structure of achievable indoor life detection according to claim 1, feature exist
In, in receiving end, the frequency f of the generation of local oscillator I1The frequency f generated for 1.67GHz, local oscillator II2For 2.06GHz, two of generation
Frequency signal is synthesized using power splitter III, is launched after power amplifier amplifies by transmitting antenna；
In receiving end 1, the reception signal 1 that receiving antenna I receives first passes through power splitter IV and is divided into two-way, all the way by center frequency
Rate is the bandpass filter II of 1.67GHz, and the bandpass filter IV that another way is 2.06GHz by centre frequency receives later
Signal 1 amplifies through low-noise amplifier I and low-noise amplifier II respectively, is respectively the sheet of 1.67GHz, 2.06GHz with frequency
Vibration signal is mixed；The mode that frequency mixer I and frequency mixer II are all made of orthogonal mixing generates the orthogonal base band letter of two-way respectively
Number 1 and baseband signal 2；Baseband signal 1 is finally converted into digital signal using analog-digital converter I and analog-digital converter II, benefit
Baseband signal 2 is converted into digital signal with analog-digital converter III and analog-digital converter IV；
In receiving end 2, the reception signal 2 that receiving antenna II receives first passes through the bandpass filter that centre frequency is 2.06GHz
VI, later by low-noise amplifier III amplify, then with frequency be 2.06GHz local oscillation signal carry out mixing generate two-way it is orthogonal
Baseband signal 3, baseband signal 3 is finally converted into digital signal using analog-digital converter V and analog-digital converter VI.
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| CN201811094566.XA CN109188371A (en) | 2018-09-19 | 2018-09-19 | A kind of double frequency double reception antenna circuit structure of achievable indoor life detection |
| LU101015A LU101015B1 (en) | 2018-09-19 | 2018-11-23 | A double-frequency double-receiving antenna circuit structure capable of implementing indoor life detection |
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| CN201811094566.XA CN109188371A (en) | 2018-09-19 | 2018-09-19 | A kind of double frequency double reception antenna circuit structure of achievable indoor life detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4513748A (en) * | 1983-08-30 | 1985-04-30 | Rca Corporation | Dual frequency heart rate monitor utilizing doppler radar |
| KR20080072424A (en) * | 2007-02-02 | 2008-08-06 | 한국과학기술원 | Radar sensor for remote vital signal detection using two frequency |
| US20160022145A1 (en) * | 2013-03-15 | 2016-01-28 | Kirill Mostov | Apparatus and methods for remote monitoring of physiological parameters |
| CN107358776A (en) * | 2017-08-23 | 2017-11-17 | 苏州豪米波技术有限公司 | Heartbeat detection radar system |
-
2018
- 2018-09-19 CN CN201811094566.XA patent/CN109188371A/en active Pending
- 2018-11-23 LU LU101015A patent/LU101015B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4513748A (en) * | 1983-08-30 | 1985-04-30 | Rca Corporation | Dual frequency heart rate monitor utilizing doppler radar |
| KR20080072424A (en) * | 2007-02-02 | 2008-08-06 | 한국과학기술원 | Radar sensor for remote vital signal detection using two frequency |
| US20160022145A1 (en) * | 2013-03-15 | 2016-01-28 | Kirill Mostov | Apparatus and methods for remote monitoring of physiological parameters |
| CN107358776A (en) * | 2017-08-23 | 2017-11-17 | 苏州豪米波技术有限公司 | Heartbeat detection radar system |
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Application publication date: 20190111 |