The Efficient Method for Calculating the Physical Optics Scattered Fields from the Concave Surfaces
In this work, the numerical steepest descent path (NSDP) method is proposed to compute the highly oscillatory physical optics (PO) scattered fields from the concave surfaces, including both the monostatic and the bistatic cases. Quadratic variations are adopted to approximate the integrands of the P...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2020/5296754 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832568561873190912 |
|---|---|
| author | Yu Mao Wu Hanzhang Zhou Ya-Qiu Jin Jun Hu Haijing Zhou Weijie Wang |
| author_facet | Yu Mao Wu Hanzhang Zhou Ya-Qiu Jin Jun Hu Haijing Zhou Weijie Wang |
| author_sort | Yu Mao Wu |
| collection | DOAJ |
| description | In this work, the numerical steepest descent path (NSDP) method is proposed to compute the highly oscillatory physical optics (PO) scattered fields from the concave surfaces, including both the monostatic and the bistatic cases. Quadratic variations are adopted to approximate the integrands of the PO type integral into the canonical form. Then, on involving the NSDP method, we deform the integration paths of the integrals into several NSDPs on the complex plain, through which the highly oscillatory integrands are converted to exponentially decay integrands. The RCS results of the PO scattered field are calculated and are compared with the high frequency asymptotic (HFA) method and the brute force (BF) method. The results demonstrate that the proposed NSDP method for calculating PO scattered fields from concave surfaces is frequency-independent and error-controllable. Numerical examples are provided to verify the efficiencies of the NSDP method. |
| format | Article |
| id | doaj-art-423ebe3630834979abca1f0f0a9222b7 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-423ebe3630834979abca1f0f0a9222b72025-02-03T00:58:49ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772020-01-01202010.1155/2020/52967545296754The Efficient Method for Calculating the Physical Optics Scattered Fields from the Concave SurfacesYu Mao Wu0Hanzhang Zhou1Ya-Qiu Jin2Jun Hu3Haijing Zhou4Weijie Wang5Department of Communication Science and Engineering, Fudan University, Shanghai 200433, ChinaDepartment of Electronic Engineering, Fudan University, Shanghai 200433, ChinaDepartment of Communication Science and Engineering, Fudan University, Shanghai 200433, ChinaSchool of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaInstitute of Applied Physics and Computational Mathematics, Beijing 100094, ChinaInstitute of Applied Physics and Computational Mathematics, Beijing 100094, ChinaIn this work, the numerical steepest descent path (NSDP) method is proposed to compute the highly oscillatory physical optics (PO) scattered fields from the concave surfaces, including both the monostatic and the bistatic cases. Quadratic variations are adopted to approximate the integrands of the PO type integral into the canonical form. Then, on involving the NSDP method, we deform the integration paths of the integrals into several NSDPs on the complex plain, through which the highly oscillatory integrands are converted to exponentially decay integrands. The RCS results of the PO scattered field are calculated and are compared with the high frequency asymptotic (HFA) method and the brute force (BF) method. The results demonstrate that the proposed NSDP method for calculating PO scattered fields from concave surfaces is frequency-independent and error-controllable. Numerical examples are provided to verify the efficiencies of the NSDP method.http://dx.doi.org/10.1155/2020/5296754 |
| spellingShingle | Yu Mao Wu Hanzhang Zhou Ya-Qiu Jin Jun Hu Haijing Zhou Weijie Wang The Efficient Method for Calculating the Physical Optics Scattered Fields from the Concave Surfaces International Journal of Antennas and Propagation |
| title | The Efficient Method for Calculating the Physical Optics Scattered Fields from the Concave Surfaces |
| title_full | The Efficient Method for Calculating the Physical Optics Scattered Fields from the Concave Surfaces |
| title_fullStr | The Efficient Method for Calculating the Physical Optics Scattered Fields from the Concave Surfaces |
| title_full_unstemmed | The Efficient Method for Calculating the Physical Optics Scattered Fields from the Concave Surfaces |
| title_short | The Efficient Method for Calculating the Physical Optics Scattered Fields from the Concave Surfaces |
| title_sort | efficient method for calculating the physical optics scattered fields from the concave surfaces |
| url | http://dx.doi.org/10.1155/2020/5296754 |
| work_keys_str_mv | AT yumaowu theefficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT hanzhangzhou theefficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT yaqiujin theefficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT junhu theefficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT haijingzhou theefficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT weijiewang theefficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT yumaowu efficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT hanzhangzhou efficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT yaqiujin efficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT junhu efficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT haijingzhou efficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces AT weijiewang efficientmethodforcalculatingthephysicalopticsscatteredfieldsfromtheconcavesurfaces |