Active externally coefficient potentiometer and scaling method of wideband synthetic aperture radar
A synthetic aperture radar and external calibration technology, applied in the field of radar detection, can solve the problems of low radar cross-sectional area, scene clutter cover, difficult high-resolution synthetic aperture radar external calibration test, etc., and achieve the effect of improving accuracy
Inactive Publication Date: 2009-08-12
INST OF ELECTRONICS CHINESE ACAD OF SCI
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Under such constraints, with the improvement of resolution, the radar cross section (RCS) of traditional passive corner reflectors is very low, which is easily covered by scene clutter, and it is difficult to apply to high-resolution synthetic aperture radar. external calibration test
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] The present invention will be described in detail below in conjunction with the accompanying drawings. It should be pointed out that the described embodiments are only considered for the purpose of illustration and not limitation of the present invention.
[0027] According to the present invention, figure 1 The block diagram of the active external scaler system structure of the wideband synthetic aperture radar shown, figure 2 It is a structural diagram of the active external scaler system of the broadband synthetic aperture radar of the present invention, including in the figure:
[0028] Receiving antenna 1, modulation module 2, radio frequency module 3 and transmitting antenna 4; the radio frequency module is respectively connected to the output of the receiving antenna and the input of the transmitting antenna, and the other input of the radio frequency module is connected to the output of the modulation module; the receiving antenna 1 receives the synthetic aper...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of radar detection, and in particular relates to a new wideband synthetic aperture radar external scaler and a calibration method thereof. Modulate the sinusoidal amplitude of the received synthetic aperture radar signal, so that the two sides of the synthetic aperture radar azimuth Doppler signal of the scaler generate symmetrical image spectrum; use the azimuth filter to extract the image frequency, and the synthetic aperture radar signal can be combined with ground object noise wave separation. The scaler mainly includes receiving and transmitting antennas, radio frequency modules and modulation modules. The present invention provides an external calibration signal that can be completely separated from ground clutter, and can accurately realize a radar transceiver system, antenna, transmission path and external scaler closed-loop test circuit that are not affected by ground clutter, even in In the case of complex and high ground objects and clutter, the accuracy of external calibration can also be greatly improved.
Description
technical field [0001] The invention belongs to the technical field of radar detection, and in particular relates to a new external scaler for wideband synthetic aperture radar. Background technique [0002] Synthetic Aperture Radar (SAR) adopts the principle of synthetic aperture to improve the azimuth resolution, while the improvement of range resolution relies on pulse compression technology, because SAR can image the ground all day and all weather, and has a certain ability to penetrate vegetation. Therefore, it is widely used in military, ocean, agriculture, forestry, resources, disaster monitoring, topographic mapping and other fields, and is especially valued by countries all over the world. At present, resolution, as one of the core technical indicators of synthetic aperture radar, has been improved from the initial hundred-meter level to sub-meter level. For example, PAMIR in Germany has reached 0.1 meter. As the main means to test the imaging resolution of synthet...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
Inventor 乔明梁兴东丁赤飚张培杰韩冰
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI