CN203069780U - Short-range probing imaging device with high resolution - Google Patents
Short-range probing imaging device with high resolution Download PDFInfo
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- CN203069780U CN203069780U CN 201320109742 CN201320109742U CN203069780U CN 203069780 U CN203069780 U CN 203069780U CN 201320109742 CN201320109742 CN 201320109742 CN 201320109742 U CN201320109742 U CN 201320109742U CN 203069780 U CN203069780 U CN 203069780U
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Abstract
The utility model discloses a short-range probing imaging device with high resolution. In the device, a linear frequency modulating source 7 outputs a broadband linear frequency modulating signal to a transmitting antenna array 6 as a transmitting signal, and meanwhile outputs to a mixer array 3 as a local oscillating signal. A receiving antenna array 5 receives a target echo signal which is then amplified by an LNA (Low-Noise Amplifier) array 4 and output to the mixer array 3. The mixer array 3 mixes the target echo signal with the local oscillating signal to obtain an intermediate frequency signal, AD (Analog to Digital) conversion is performed through a multi-path data collecting module 2, and the signal is output to a signal processing and imaging module 1. According to the utility model, the broadband linear frequency modulating signal is used as a probing signal, and a measure of mixing by delaying the local oscillating signal is performed for longer range probing, so that the imaging resolution of the whole probing area is ensured, and the probing range is not limited by the maximum unambiguous distance. Data is just collected for the intermediate frequency signal without a broadband high speed sampling system, so that the realizing difficulty of the data collecting part is reduced.
Description
Technical field
The utility model relates to a kind of detecting and imaging device, relates in particular to a kind of short range high resolving power detecting and imaging device.
Background technology
The short-range detecting imaging device can be used for penetrating purposes such as search and rescue in target following location, the prospecting of spy ground, the ruins of barrier, warning safety check.Improve its imaging resolution and image taking speed, increase its investigative range, reduce its cost and realize difficulty, be the main difficult point problem that faces in the design always.The imaging resolution of device depends on the effective bandwidth of detectable signal, and effective bandwidth is more big, and resolution is more high.Therefore, adopt broadband signal to carry out imaging as detectable signal, can obtain higher resolution.At present, the implementation of Chinese scholars proposition mainly contains following several mode:
Transmit and adopt broadband shock pulse signal, instrumentation logic is simple in structure, realize the miniaturization design easily, but the signal transient bandwidth is very big, receiving end need adopt the broadband High Speed Sampling System that the ultra-narrow pulse signal is carried out the AD conversion, realizes that difficulty is big, cost is higher.
Transmit and adopt step frequency signal to obtain big effective bandwidth, the signal transient bandwidth is less, receiving end need not adopt the broadband high-speed sampling system, significantly reduced the requirement to hardware, but it exists the maximum that is inversely proportional to frequency step length Δ f not have fuzzy distance, and investigative range is subjected to bigger restriction.
The employing linear FM signal transmits, receiving end uses correlation receiver to carry out the big time wide bandwidth of time domain pulse compression acquisition and amasss, can solve the contradiction that increases between detection range and the raising range resolution, realization is to the accurate detecting and tracking of remote object such as aircraft etc., but its receiving end hardware system still must have bigger instant bandwidth, also needs the broadband High Speed Sampling System that signal is carried out the AD conversion.The range resolution that the short range imaging device requires is higher usually, and the instant bandwidth of receiving end can be bigger, even reach several GHz, if directly adopt this scheme, realizes that difficulty will be bigger, and cost is also higher.
The utility model content
The purpose of this utility model is exactly in order to address the above problem, provide a kind of short range high resolving power to survey formation method and device, it has on the basis that guarantees imaging resolution and investigative range, improves its image taking speed, reduces the advantage that it realizes difficulty and cost.
To achieve these goals, the utility model adopts following technical scheme:
A kind of short range high resolving power detecting and imaging device, it comprises the linear frequency modulation source, the linear frequency modulation source links to each other with the frequency mixer array with transmitting antenna array respectively, described transmitting antenna array matches with receiving antenna array, described receiving antenna array links to each other with the frequency mixer array by the low noise amplifier array, described frequency mixer array links to each other with the multi-channel data acquisition module, and described multi-channel data acquisition module is handled with signal and linked to each other with image-forming module.
Also be provided with delay unit between described linear frequency modulation source and frequency mixer.
Described transmitting antenna array and receiving antenna array adopt 1 aerial array of overcharging.
A kind of detection formation method based on short range high resolving power detecting and imaging device, concrete steps are:
Step 1: determine search coverage, the specific inductive capacity of propagation medium and imaging resolution, linear frequency modulation source output two-way FM signal, the one tunnel as transmitting through the transmitting antenna array radiation, and another road is used as local oscillation signal and exports the frequency mixer array to;
Step 2: determine that i group dual-mode antenna is to the travel path l of corresponding respective point
i(A) and search coverage every bit every group of signal propagation time t that dual-mode antenna is right relatively
i(A), with t
i(A) store high-speed memory into;
Step 3: receiving antenna array receives the echoed signal of detection of a target reflection, exports the frequency mixer array to, obtains intermediate-freuqncy signal with the local oscillation signal described in the step 1 through the mixing of frequency mixer array;
Step 4: the intermediate-freuqncy signal processing to each the frequency mixer output in the frequency mixer array obtains its frequency spectrum, and the frequency spectrum of i frequency mixer is designated as S
i(Δ f), and obtain the delay profile S of target scattering signal according to the frequency spectrum of frequency mixer output intermediate-freuqncy signal
i(Δ t);
Step 5: judge whether environmental parameter and imaging resolution are adjusted, if environmental parameter and imaging resolution change then return step 1, judging whether if environmental parameter and imaging resolution do not change need be to the environmental background imaging, if desired to background imaging execution in step six then, if desired to echo signal imaging execution in step seven then;
Step 6: remove echo signal, keep background signal, calculate S then
iThe backscatter signal range value that (Δ t) is corresponding calculates the range value of the right backscatter signal of L dual-mode antenna, and carries out coherence stack and obtain PBG
Total(A), it is stored to high-speed memory;
Step 7: extract echo signal, calculate S then
iThe backscatter signal range value that (Δ t) is corresponding calculates the range value of the right backscatter signal of L dual-mode antenna, carries out obtaining P after the coherence stack
Total(A), again with deposit to the PBG of high speed storer
Total(A) obtain the imaging of final search coverage after the stack, obtain the positional information of the detection of a target.
The concrete steps of described step 2 are:
(2-1) determine that i group dual-mode antenna is to the travel path l of corresponding M*N point
i(A), search coverage is long to be the M point, and wide is the N point, and the right number of dual-mode antenna is L, then needs the computing of M*N*L group, and any 1 A of search coverage is designated as l with respect to the right travel path of i group dual-mode antenna
i(A);
(2-2) according to the travel path in the step (2-1), determine search coverage every bit every group of signal propagation time that dual-mode antenna is right relatively, and with every group of signal propagation time t that dual-mode antenna is right
i(A) store high-speed memory into;
t
i(A)＝l
i(A)/v
The concrete steps of described step 4 are:
Frequency spectrum S according to frequency mixer output intermediate-freuqncy signal
i(Δ f), and utilize formula:
Δt-td
i＝(Δf/B)·T
0＝(T
0/B)·Δf
Δf＝(B/T
0)·(Δt-td
i)
Obtain the delay profile S of target scattering signal
i(Δ t), wherein, B is the bandwidth of wide-band linearity FM signal, td
iBe the time delay of delay unit between linear frequency modulation source and i frequency mixer.
The calculation procedure of imaging resolution is in the described step 5:
According to the difference of detection range, segmentation is calculated the effective bandwidth of detectable signal and is determined the imaging resolution of different search coverages, and target echo signal is as follows with respect to the relation of the effective bandwidth of Δ t time delay, the target range R that transmit and detectable signal:
B
e＝B(1-（Δt-td
i）/T
0)，td
i≠0
Δt＝2R/v
Described detectable signal effective bandwidth B
eAs follows with the relation of target range resolution ax/r:
Δr＝v/2B
e。
The concrete steps of described step 6 are:
(6-1) removing echo signal only keeps the environmental background signal and obtains delay profile S
I, BG(Δ t) reads the signal propagation time t that is stored in high-speed memory then
i(A), with each t
i(A) S of time point correspondence
I, BG(Δ t) amplitude is composed to P
I, BG(A);
(6-2) with L the P that dual-mode antenna is right
I, BG(A) coherence stack obtains PBG
Total(A), be stored to high-speed memory.
The concrete steps of described step 7 are:
(7-1) according to the scattered signal of point target at delay profile S
iPulse characteristic on (Δ t) is extracted echo signal and is obtained delay profile S
I, Tget(Δ t), and read the signal propagation time t that is stored in high-speed memory
i(A), with each t
i(A) S of time point correspondence
I, Tget(Δ t) amplitude is composed to P
I, Tget(A);
(7-2) to L P that dual-mode antenna is right in the step (7-1)
I, Tget(A) coherence stack obtains P
Total(A);
(7-3) with the P in the step (7-2)
Total(A) be superimposed with PBG in step (6-2) the high speed storer
Total(A) obtain new P
Total(A), obtain the imaging of final search coverage and the positional information of the detection of a target.
Receiving antenna array is sent into the frequency mixer array through low noise amplifier after receiving echoed signal in the described step 3.
Wherein: c is the light velocity, ε
rBe the relative dielectric constant of propagation medium, v is the velocity of propagation of electromagnetic wave in propagation medium, and B is the bandwidth of wide-band linearity FM signal, T
0Be sweep time, Δ t be target echo signal with respect to the time delay that transmits, Δ f also is the difference frequency of local oscillation signal and echoed signal for the intermediate-freuqncy signal frequency of frequency mixer array output.
The beneficial effects of the utility model:
(1) adopts the wide-band linearity FM signal as detectable signal, and longer-distance detection is taked to postpone the measure that local oscillation signal carries out mixing, guaranteed the imaging resolution of whole search coverage, and investigative range is not subjected to the restriction of maximum no fuzzy distance.
(2) need only carry out data acquisition to intermediate-freuqncy signal, need not the broadband High Speed Sampling System, reduced the realization difficulty of part of data acquisition.
(3) imaging resolution apart from far and near self-adaptation adjustment, has reduced the imaging operand with search coverage, has improved image taking speed.
(4) adopt the dual-mode antenna array, the scanning of need not moving of device and antenna has improved the real-time of imaging, and can realize three-dimensional imaging.
(5) survey with the wide-band microwave signal, can penetrate barrier and realize high-resolution imaging.
(6) different acquisition environments, different-waveband can be set in the linear frequency modulation source, and selects the different dual-mode antennas in the dual-mode antenna array for use, and the timesharing emission receives detectable signal, improves image quality.
Description of drawings
Fig. 1 is detecting and imaging device basic block diagram of the present utility model;
Fig. 2 (a) is detectable signal effective bandwidth, echoed signal time delay, frequency mixer array output intermediate-freuqncy signal frequency, detection of a target position mutual relationship synoptic diagram I;
Fig. 2 (b) is detectable signal effective bandwidth, echoed signal time delay, frequency mixer array output intermediate-freuqncy signal frequency, detection of a target position mutual relationship synoptic diagram II;
Fig. 2 (c) is detectable signal effective bandwidth, echoed signal time delay, frequency mixer array output intermediate-freuqncy signal frequency, detection of a target position mutual relationship synoptic diagram III;
Fig. 3 is the basic procedure of search coverage target imaging;
Fig. 4 is detecting and imaging device embodiment synoptic diagram of the present utility model.
Wherein, 1. signal is handled and image-forming module, 2. multi-channel data acquisition module, 3. frequency mixer array, 4. low noise amplifier array, 5. receiving antenna array, 6. transmitting antenna array, 7. linear frequency modulation source.
Embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1, a kind of short range high resolving power detecting and imaging device, linear frequency modulation source 7 links to each other with frequency mixer array 3 with transmitting antenna array 6 respectively, described transmitting antenna array 6 matches with receiving antenna array 5, described receiving antenna array 5 links to each other with frequency mixer array 3 by low noise amplifier array 4, described frequency mixer array 3 links to each other with multi-channel data acquisition module 2, and described multi-channel data acquisition module 2 is handled with signal and linked to each other with image-forming module 1.
In this device, annexation and the function of each parts are as follows:
(1) linear frequency modulation source 7 links to each other with transmitting antenna array 6, frequency mixer array 3, produces the wide-band linearity FM signal and exports transmitting antenna array 6 to as transmitting, and also exports frequency mixer array 3 to as local oscillation signal simultaneously;
(2) receiving antenna array 5 links to each other with frequency mixer array 3 by low noise amplifier array 4, receives target echo signal by 4 amplifications of low noise amplifier array and exports frequency mixer array 3 to;
(3) frequency mixer array 3 links to each other with multi-channel data acquisition module 2, to obtain intermediate-freuqncy signal after target echo signal and the local oscillation signal mixing, and exporting multi-channel data acquisition module 2 to, target echo signal is included in the frequency spectrum of intermediate-freuqncy signal with respect to the time delay that transmits;
(4) signal is handled and is linked to each other with multi-channel data acquisition module 2 with image-forming module 1, according to the position of emitting antenna and receiving antenna, the dielectric property of detectable signal travel path, the frequency spectrum of intermediate-freuqncy signal, by calculating the positional information of target;
(5) signal is handled a plurality of dual-mode antennas that will transmit and receive aerial array with image-forming module 1 target position information that records is respectively carried out coherence stack, thereby and is superimposed with the real time imagery that background information realizes search coverage.
In this device, signal handle with image-forming module 1 can be according to detection range different, segmentation is calculated the effective bandwidth of detectable signal and is determined the imaging resolution of different search coverages, the realization imaging resolution is adjusted with the search coverage self-adaptation, carry out imaging then according to this, reduce operand, improve image taking speed.
This device is for longer-distance detection, by after increasing delay unit between Linear Frequency Modulation Source 7 and the frequency mixer array 3 local oscillation signal being postponed the set time again with the target echo signal mixing, perhaps linear frequency modulation source 7 has two identical oscillators and one of them time-delay triggering is obtained lagging behind local oscillation signal and the target echo signal mixing that transmits, aggrandizement apparatus effective bandwidth improves the resolution of long-range detection imaging.
This device can penetrate barriers such as wall, stratum, ruins with the wide-band microwave signal as detectable signal, and search coverage is carried out high-resolution imaging.
Shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c), transmitting is that linear FM signal, initial frequency are f
0, bandwidth is B, be T sweep time
0, target echo signal is with respect to being the time delay that transmits Δ t, and the intermediate-freuqncy signal frequency of frequency mixer array output is Δ f, and corresponding target location is p, and this moment, the effective bandwidth of detectable signal was B
e, satisfy
Intermediate-freuqncy signal is the unique signal that comprises target position information, the echo time-delay that different target ranges is corresponding different, and the different corresponding different intermediate-freuqncy signal frequencies of echo time-delay, linear between them, satisfy
R is target range in the formula, and c is the light velocity, ε
rBe the relative dielectric constant of propagation medium, v is the velocity of propagation of electromagnetic wave in propagation medium, that is to say, target range R is directly proportional with the intermediate-freuqncy signal frequency Δ f of frequency mixer array output.Signal is handled and the frequency spectrum of image-forming module 1 by FFT operational analysis intermediate-freuqncy signal, and in conjunction with the position of emitting antenna and receiving antenna, the dielectric property of detectable signal travel path, by calculating the positional information of target, a plurality of dual-mode antennas that will transmit and receive aerial array at last carry out coherence stack to the target position information that records respectively, thereby and are superimposed with the real time imagery that background information realizes search coverage.
By Fig. 2 and above-mentioned analysis as can be known, the effective bandwidth that different target ranges is corresponding different, the effective bandwidth of detectable signal reduces with the increase of detection range, satisfies
And the imaging resolution of device is only relevant with effective bandwidth, and effective bandwidth is more big, and resolution is more high.Therefore, signal is handled can be divided into different search coverages with investigative range according to the different of detection range with image-forming module 1, calculate effective bandwidth separately respectively and determine imaging resolution, realize resolution with search coverage apart from far and near self-adaptation adjustment, be reduced to counting of picture as far as possible, to reduce operand, improve image taking speed.For longer-distance detection, then also can postpone the set time with transmitting after again with the target echo signal mixing, to increase effective bandwidth, improve the resolution of long-range detection imaging.
As shown in Figure 3, be search coverage target imaging basic flow sheet, a kind of detection formation method based on short range high resolving power detecting and imaging device, concrete steps are:
Step 1: determine search coverage, the specific inductive capacity of propagation medium and imaging resolution, linear frequency modulation source output two-way FM signal, the one tunnel as transmitting through the transmitting antenna array radiation, and another road is used as local oscillation signal and exports the frequency mixer array to;
Step 2: determine that i group dual-mode antenna is to the travel path l of corresponding respective point
i(A) and search coverage every bit every group of signal propagation time t that dual-mode antenna is right relatively
i(A), with t
i(A) store high-speed memory into;
Step 3: receiving antenna array receives the echoed signal of detection of a target reflection, exports the frequency mixer array to, obtains intermediate-freuqncy signal with the local oscillation signal described in the step 1 through the mixing of frequency mixer array;
Step 4: the intermediate-freuqncy signal processing to each the frequency mixer output in the frequency mixer array obtains its frequency spectrum, and the frequency spectrum of i frequency mixer is designated as S
i(Δ f), and obtain the delay profile S of target scattering signal according to the frequency spectrum of frequency mixer output intermediate-freuqncy signal
i(Δ t);
Step 5: judge whether environmental parameter and imaging resolution are adjusted, if environmental parameter and imaging resolution change then return step 1, judging whether if environmental parameter and imaging resolution do not change need be to the environmental background imaging, if desired to background imaging execution in step six then, if desired to echo signal imaging execution in step seven then;
Step 6: remove echo signal, keep background signal, calculate S then
iThe backscatter signal range value that (Δ t) is corresponding calculates the range value of the right backscatter signal of L dual-mode antenna, carries out coherence stack and obtains PBG
Total(A), it is stored to high-speed memory;
Step 7: extract echo signal, calculate S then
iThe backscatter signal range value that (Δ t) is corresponding calculates the range value of the right backscatter signal of L dual-mode antenna, carries out obtaining P after the coherence stack
Total(A), again with deposit to the PBG of high speed storer
Total(A) obtain the imaging of final search coverage after the stack, obtain the positional information of the detection of a target.
According to the actual conditions of search coverage, calculate search coverage every bit every group of signal propagation path that dual-mode antenna is right relatively.Search coverage is long to be the M point, and wide is the N point, and the right number of dual-mode antenna is L, carries out the computing of M*N*L group altogether, and any 1 A of search coverage is designated as l with respect to the right travel path of i group dual-mode antenna
i(A).
According to following formula, calculate search coverage every bit every group of signal propagation time that dual-mode antenna is right relatively.
t
i(A)＝l
i(A)/v
Intermediate-freuqncy signal to each frequency mixer output in the frequency mixer array 3 is carried out the FFT conversion, obtains its frequency spectrum, and the frequency spectrum of i frequency mixer output intermediate-freuqncy signal is designated as S
i(Δ f).
Carry out conversion according to following formula, obtain the delay profile S of target scattering signal
i(Δ t).
Δt-td
i＝(Δf/B)·T
0＝(T
0/B)·Δf
Δf＝(B/T
0)·(Δt-td
i)
According to following formula, calculate search coverage every bit every group of backscatter signal range value that dual-mode antenna is right relatively, obtain the positional information of the detection of a target.
In described step 6 and the step 7 target position information being carried out coherence stack, to carry out imaging process as follows:
According to following formula, every group of dual-mode antenna carried out coherence stack to the target position information that records respectively, obtain the imaging of search coverage.
Wherein: c is the light velocity, ε
rBe the relative dielectric constant of propagation medium, v is the velocity of propagation of electromagnetic wave in propagation medium, and B is the bandwidth of wide-band linearity FM signal, T
0Be sweep time, Δ t be target echo signal with respect to the time delay that transmits, Δ f also is the difference frequency of local oscillation signal and echoed signal for the intermediate-freuqncy signal frequency of frequency mixer array output.
Described target echo signal is as follows with respect to the relation of the intermediate-freuqncy signal frequency Δ f of Δ t time delay that transmits, frequency mixer array 3 outputs and target range R:
R＝v·(Δt/2)＝(v/2)·((Δf/B)·T
0+td
i)＝(vT
0/2B)·Δf+v·td
i/2
Be that target range R is directly proportional with respect to Δ t time delay that transmits with target echo signal, be directly proportional with the intermediate-freuqncy signal frequency Δ f of frequency mixer array 3 outputs.
Described target echo signal is as follows with respect to the relation of the effective bandwidth of Δ t time delay, the target range R that transmit and detectable signal:
B
e＝B(1-（Δt-td
i）/T
0)，td
i≠0
Δt＝2R/v
Wherein: B
eBe the effective bandwidth of detectable signal, with the reducing and increase of Δ t time delay, reduce with the increase of target range R.
According to the difference of detection range, segmentation is calculated the effective bandwidth of detectable signal and is determined the imaging resolution of different search coverages, described detectable signal effective bandwidth B
eAs follows with the relation of target range resolution ax/r:
Δr＝v/2B
e。
Wherein: Δ r is target range resolution, by detectable signal effective bandwidth B
eUnique decision is with B
eIncrease and reduce.
Described receiving antenna array 5 can be arranged receiving antenna simultaneously along level and vertical direction, realizes the three-dimensional imaging of search coverage.
Aforesaid short range high resolving power is surveyed formation method, it is characterized in that: according to the difference of detection range, segmentation is calculated the effective bandwidth of detectable signal and is determined the imaging resolution of different search coverages, realize resolution with search coverage apart from far and near self-adaptation adjustment, carry out imaging then according to this, reduce the pixel number of search coverage imaging, reduce operand, improve image taking speed.
Aforesaid short range high resolving power is surveyed formation method, it is characterized in that: calculate the search coverage every bit right signal propagation path of every group of dual-mode antenna and after the travel-time relatively, result of calculation is inserted high-speed memory, then during each imaging, as long as environment does not change and imaging resolution is adjusted, just can from high-speed memory, directly read use, and not need to carry out again the computing of M*N*L group, significantly improve image taking speed.
Aforesaid short range high resolving power is surveyed formation method, it is characterized in that: in advance the environmental background signal is mapped in advance imaging region and insert high-speed memory, then during each imaging, only the target scattering signal that changes being carried out low computational effort handles, avoid the mapping of full-time long signal data to calculate, significantly reduce the operand of imaging algorithm.
Aforesaid short range high resolving power is surveyed formation method, it is characterized in that: for longer-distance detection, local oscillation signal postponed the set time after again with the target echo signal mixing, increase effective bandwidth, improve the resolution of long-range detection imaging.
As shown in Figure 4, detecting and imaging device uses wide-band microwave linear frequency modulation source, adopts 14 receipts aerial array to transmit and receive detectable signal, penetrates wall search coverage is carried out high-resolution imaging, and wherein T is emitting antenna, R
1-R
4Be receiving antenna.Corresponding to 4 receiving antennas, device has 4 tunnel amplifications, mixing and data acquisition channel, wherein 1, the 4 tunnel can select between Linear Frequency Modulation Source 7 and the frequency mixer array 3 to increase microwave delay line and is used for long-range detection as delay unit and improves imaging resolution.Signal is handled with image-forming module 14 dual-mode antennas is carried out coherence stack to the target position information that records respectively, and is superimposed with the real time imagery that background information can realize search coverage.
Test scene among Fig. 4 is as follows: the detection of a target is positioned at 5 meters spaces behind the wall, detectable signal is 2*5=10 rice to the maximum in the distance of space transmission, add 4.2 meters of the intrinsic bad channel of signal transmitting and receiving passage and local oscillations passage, can get detection of a target spatial variations distance range is 4.2 meters-14.2 meters; The Sweep Source parameter arranges: sweep bandwidth 2Ghz, and sweep time, 40ms according to detection of a target spatial variations scope, can get that the scope of output intermediate-freuqncy signal is 700Hz-2.4KHz after the mixing; 14 of aerial array is received horizontally, and 4 dual-mode antennas that superpose carry out imaging to the target position information that records respectively, can reach tens centimetres range resolution.
Though above-mentionedly by reference to the accompanying drawings embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (3)
1. short range high resolving power detecting and imaging device, it is characterized in that, it comprises the linear frequency modulation source, the linear frequency modulation source links to each other with the frequency mixer array with transmitting antenna array respectively, described transmitting antenna array matches with receiving antenna array, described receiving antenna array links to each other with the frequency mixer array by the low noise amplifier array, and described frequency mixer array links to each other with the multi-channel data acquisition module, and described multi-channel data acquisition module is handled with signal and linked to each other with image-forming module.
2. a kind of short range high resolving power detecting and imaging device according to claim 1 is characterized in that, also is provided with delay unit between described linear frequency modulation source and frequency mixer.
3. a kind of short range high resolving power detecting and imaging device according to claim 1 is characterized in that, described transmitting antenna array and receiving antenna array adopt 1 aerial array of overcharging.
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