RCS Estimation of Singly Curved Dielectric Shell Structure with PMCHWT Method and Experimental Verification

• Published in: Sensors (Basel, Switzerland) Vol. 22; no. 3; p. 734
• Main Authors: Im, Hyeong-Rae, Kim, Woobin, Noh, Yeong-Hoon, Hong, Ic-Pyo, Yook, Jong-Gwan
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 19.01.2022; MDPI
• Subjects: Accuracy; Aircraft; Algorithms; Antennas; Calibration; Communication; Dielectrics; Electric fields; Electromagnetic scattering; Electromagnetism; Fighter aircraft; Integral equations; method of moment (MoM); Methods; monostatic RCS measurement; Numerical analysis; Poggio–Miller–Chang–Harrington–Wu–Tsai (PMCHWT); radar cross section (RCS); Shells (structural forms); singly curved dielectric; Software; Verification; monostatic RCS measurement; method of moment (MoM); singly curved dielectric; radar cross section (RCS); Poggio–Miller–Chang–Harrington–Wu–Tsai (PMCHWT)
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s22030734

In this paper, a numerical algorithm for the electromagnetic scattering analysis of singly curved dielectric structures, which can be applied to a canopy of fighter aircraft, is presented with experimental verification. At first, the Poggio-Miller-Chang-Harrington-Wu-Tsai (PMCHWT) method is used as a MoM-based solution for the electromagnetic scattering of a dielectric material. Its formulation was generated with the EFIE formulation in a multi-region condition. The PMCHWT algorithm is implemented with C++ code, and the accuracy is verified by calculating the bistatic RCS of some canonical structures with conductive or dielectric materials. RCS measurement under quasi-anechoic condition is presented with its procedure and calibration method. The monostatic RCS results of a specially modeled singly curved dielectric structures are obtained analytically with the PMCHWT, as well as experimentally, revealing excellent agreement.