TY - GEN

T1 - A comparison between the FDTD convolutional PML and reradiating boundary conditions for simple 3D test problem

AU - Scherbatko, I.

AU - Churyumov, G.

AU - Ustyantsev, M.

AU - Maksymov, I.

PY - 2008

Y1 - 2008

N2 - In this paper we provide a field termination performance comparison between convolutional PML and reradiating FDTD boundary conditions for simple numerical experiment. It is shown that for the 3D case a simple stackable re-radiating boundary condition (R-RBC) competes with a convolutional Perfectly Matched Layer (CPML). The essence of the R-RBC which based on Field Teleportation technique, is to invoke the principle of equivalent sources using FDTD's discrete definition of the curl to copy any field propagating in one FDTD domain to a finite region of another domain. In this paper we apply this technique of Field Teleportation to the original 3D domain itself to create a transparent boundary across which any outward traveling FDTD field produces an exact negative copy of itself causing self-canceling. Relatively thin (5 cells) RRBC readily yields absorption of the order of -80 dB in 3D "anechoic chamber" test whereas CPML shows similar performance for a 20-cells layer.

AB - In this paper we provide a field termination performance comparison between convolutional PML and reradiating FDTD boundary conditions for simple numerical experiment. It is shown that for the 3D case a simple stackable re-radiating boundary condition (R-RBC) competes with a convolutional Perfectly Matched Layer (CPML). The essence of the R-RBC which based on Field Teleportation technique, is to invoke the principle of equivalent sources using FDTD's discrete definition of the curl to copy any field propagating in one FDTD domain to a finite region of another domain. In this paper we apply this technique of Field Teleportation to the original 3D domain itself to create a transparent boundary across which any outward traveling FDTD field produces an exact negative copy of itself causing self-canceling. Relatively thin (5 cells) RRBC readily yields absorption of the order of -80 dB in 3D "anechoic chamber" test whereas CPML shows similar performance for a 20-cells layer.

UR - http://www.scopus.com/inward/record.url?scp=51749109048&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=51749109048&partnerID=8YFLogxK

U2 - 10.1109/MMET.2008.4581007

DO - 10.1109/MMET.2008.4581007

M3 - Conference paper

AN - SCOPUS:51749109048

SN - 9781424422845

T3 - Mathematical Methods in Electromagnetic Theory, MMET, Conference Proceedings

SP - 398

EP - 400

BT - Conference Proceedings - The 12th International Conference on Mathematical Methods in Electromagnetic Theory, MMET 08

T2 - 12th International Conference on Mathematical Methods in Electromagnetic Theory, MMET 08

Y2 - 29 June 2008 through 2 July 2008

ER -