{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T14:53:31Z","timestamp":1773240811125,"version":"3.50.1"},"reference-count":29,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2021,1,3]],"date-time":"2021-01-03T00:00:00Z","timestamp":1609632000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the Project funded by China Postdoctoral Science Foundation","award":["Grant Nos. BX20200035, 2020M680005"],"award-info":[{"award-number":["Grant Nos. BX20200035, 2020M680005"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In order to study the radar signature of a tandem helicopter in the X-band, a dynamic analysis approach (DAA) is presented to determine its radar cross-section (RCS) under different influence factors. The basic passage time, rotation speed, observation angle, rotor disk inclination, fuselage attitude angle and Doppler feature are studied and discussed in detail. The results show that the dynamic characteristics of the rotor RCS will bring significant changes to the peak and average values of the helicopter RCS. Within a given observation angle range, a larger elevation angle is undesirable for helicopter stealth. The inclination of the rotor disc will affect the many small peaks and local fluctuations of the helicopter RCS. The positively increased attitude angle will have an undesirable effect on the average RCS and dynamic characteristics of the helicopter. The DAA is feasible and effective for studying the radar cross-section of a tandem helicopter.<\/jats:p>","DOI":"10.3390\/s21010271","type":"journal-article","created":{"date-parts":[[2021,1,3]],"date-time":"2021-01-03T19:54:46Z","timestamp":1609703686000},"page":"271","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["X-Band Radar Cross-Section of Tandem Helicopter Based on Dynamic Analysis Approach"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8469-5879","authenticated-orcid":false,"given":"Zeyang","family":"Zhou","sequence":"first","affiliation":[{"name":"School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jun","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,1,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Niu, L., Xie, Y., Wu, P., and Zhang, C. (2020). ARCS: Active radar cross section for multi-radiator problems in complex EM environments. Sensors, 20.","DOI":"10.3390\/s20123371"},{"key":"ref_2","first-page":"167","article-title":"Aerodynamic characteristics analysis of twin-rotor in tandem helicopter","volume":"11","author":"Chen","year":"2020","journal-title":"Adv. Aeronaut. Sci. Eng."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Zhou, Z., and Huang, J. (2020). Influence of rotor dynamic scattering on helicopter radar cross-section. Sensors, 20.","DOI":"10.3390\/s20072097"},{"key":"ref_4","first-page":"57","article-title":"Analysis of key technology and development trend of foreign tandem helicopter","volume":"1","author":"Yu","year":"2010","journal-title":"Helicopter Technol."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"244","DOI":"10.1016\/j.ast.2019.06.003","article-title":"Acoustic and radar integrated stealth design for ducted tail rotor based on comprehensive optimization method","volume":"92","author":"Zhou","year":"2019","journal-title":"Aerosp. Sci. Technol."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Alhaji Musa, S., Raja Abdullah, R.S.A., Sali, A., Ismail, A., and Rashid, N.E.A. (2019). Low-Slow-Small (LSS) Target Detection Based on Micro Doppler Analysis in Forward Scattering Radar Geometry. Sensors, 19.","DOI":"10.3390\/s19153332"},{"key":"ref_7","first-page":"363","article-title":"Experimental investigations on flow field and performance of tandem rotors","volume":"43","author":"Huang","year":"2011","journal-title":"J. Nanjing Univ. Aeronaut. Astronaut."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"105483","DOI":"10.1016\/j.ast.2019.105483","article-title":"Radar\/infrared integrated stealth optimization design of helicopter engine intake and exhaust system","volume":"95","author":"Zhou","year":"2019","journal-title":"Aerosp. Sci. Technol."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Li, J., Zhang, M., Jiang, W., and Wei, P. (2020). Improved FBAM and GO\/PO Method for EM Scattering Analyses of Ship Targets in a Marine Environment. Sensors, 20.","DOI":"10.3390\/s20174735"},{"key":"ref_10","first-page":"816","article-title":"Dynamic RCS Behavior of Helicopter Rotating Blades","volume":"27","author":"Ye","year":"2006","journal-title":"Acta Aeronaut. Astronaut. Sin"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Linghu, L., Wu, J., Wu, Z., and Wang, X. (2018). Parallel computation of EM backscattering from large three-dimensional sea surface with CUDA. Sensors, 18.","DOI":"10.3390\/s18113656"},{"key":"ref_12","first-page":"1034","article-title":"Rotor icing model and trim characteristics analysis for tandem helicopter","volume":"36","author":"Li","year":"2010","journal-title":"J. Beijing Univ. Aeronaut. Astronaut."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Guo, L., Zhang, X., Yao, D., Yang, Q., Bai, Y., and Deng, W. (2020). A single-dataset-based pre-processing joint domain localized algorithm for clutter-suppression in shipborne high-frequency surface-wave radar. Sensors, 20.","DOI":"10.1109\/RadarConf2043947.2020.9266482"},{"key":"ref_14","first-page":"83","article-title":"Unmanned tandem helicopter simulation","volume":"43","author":"Wang","year":"2003","journal-title":"J. Tsinghua Univ. Sci. Technol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"106047","DOI":"10.1016\/j.ast.2020.106047","article-title":"Compound helicopter multi-rotor dynamic radar cross section response analysis","volume":"105","author":"Zhou","year":"2020","journal-title":"Aerosp. Sci. Technol."},{"key":"ref_16","first-page":"62","article-title":"Comparative analysis of tandem helicopter and single rotor helicopter","volume":"2","author":"Yu","year":"2008","journal-title":"Helicopter Technol."},{"key":"ref_17","first-page":"74","article-title":"Analysis for determining trim, stability and control ability of tandem helicopter","volume":"35","author":"Li","year":"2009","journal-title":"J. Beijing Univ. Aeronaut. Astronaut."},{"key":"ref_18","unstructured":"Zhou, Z., Huang, J., and Wang, J. (2020). Electromagnetic scattering characteristics of coaxial helicopter based on dynamic transformation method. Chin. J. Aeronaut."},{"key":"ref_19","first-page":"29","article-title":"Design and simulation of tandem helicopter control law based on Dspace","volume":"3","author":"Zhang","year":"2011","journal-title":"Helicopter Technol."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Galati, G., Pavan, G., and Wasserzier, C. (2020). Characterization of Back-Scattering and Multipath in a Suburban Area after the Calibration of an X-Band Commercial Radar. Sensors, 20.","DOI":"10.3390\/s20020463"},{"key":"ref_21","first-page":"34","article-title":"Unmanned Tandem Helicopter Robust Guaranteed Cost Controller","volume":"37","author":"Yan","year":"2018","journal-title":"Ordnance Ind. Autom."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Balal, N., Balal, Y., Richter, Y., and Pinhasi, Y. (2020). Detection of Low RCS Supersonic Flying Targets with a High-Resolution MMW Radar. Sensors, 20.","DOI":"10.3390\/s20113284"},{"key":"ref_23","first-page":"322732","article-title":"Novel technology for electromagnetic characteristic simulation of helicopter blades","volume":"40","author":"Guo","year":"2019","journal-title":"Acta Aeronaut. Astronaut. Sin"},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Han, Q., Pan, M., Long, W., Liang, Z., and Shan, C. (2020). Joint Adaptive Sampling Interval and Power Allocation for Maneuvering Target Tracking in a Multiple Opportunistic Array Radar System. Sensors, 20.","DOI":"10.3390\/s20040981"},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Li, Y., Liu, Y., Wang, Y., Lin, Y., and Shen, W. (2020). The Millimeter-Wave Radar SLAM Assisted by the RCS Feature of the Target and IMU. Sensors, 20.","DOI":"10.3390\/s20185421"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"607","DOI":"10.1016\/j.ast.2018.09.030","article-title":"Comprehensive optimization of aerodynamic noise and radar stealth for helicopter rotor based on Pareto solution","volume":"82","author":"Zhou","year":"2018","journal-title":"Aerosp. Sci. Technol."},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Su, C., Ishimaru, A., and Kuga, Y. (2020). Time-domain analysis of multiple scattering effects on the radar cross section (RCS) of objects in a random medium. Waves Random Complex Media.","DOI":"10.1080\/17455030.2019.1708513"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1396","DOI":"10.1109\/TAP.2002.800693","article-title":"Calculation and Analysis of Electromagnetic Scattering by Helicopter Rotating Blades","volume":"50","author":"Pouliguen","year":"2002","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"590","DOI":"10.1109\/TAP.1975.1141105","article-title":"Far\u2014field approximations to the Kirchhoff\u2014Helmholtz representations of scattered fields","volume":"23","author":"Gordon","year":"1975","journal-title":"IEEE Trans. Antennas Propag."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/1\/271\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:06:32Z","timestamp":1760159192000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/1\/271"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,1,3]]},"references-count":29,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2021,1]]}},"alternative-id":["s21010271"],"URL":"https:\/\/doi.org\/10.3390\/s21010271","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,1,3]]}}}