Hybridization of the Dual-Grid FDTD with the physical optics to analyze antennas mounted on large and complex platforms

Abstract

-This paper presents a new simulation strategy based on the hybridization of a full wave time domain multi-scale method, the DualGrid FDTD (DG-FDTD), and the Physical Optics (PO). This new method aims at simulating antennas mounted on large conducting platforms and whose nearby surrounding environment is very complex. Typical application fields of the hybrid DG-FDTD/PO method are the computation of radiation patterns of antennas mounted on carriers such as satellites, ships, aircraft and land vehicules.

Analysis of surrounded antennas mounted on large and complex structures using a hybrid method

“…As described in [7] and shown in Fig. 3, DG-FDTD/IPO approach considers successively larger and larger subdomains.…”

“…1) is performed using two simulations steps as presented in Fig. 3 (see [7] for more details). The antenna and its complex vicinity are first simulated rigorously and efficiently using the DG-FDTD method.…”

“…1 is considered. Note that the analyzed structure is identical to the one used to validate the DG-FDTD/PO in [7]. The complete scenario is first analyzed with the DG-FDTD/IPO method in II-A.…”

“…These methods can be separated into two groups, rigorous methods [2], [3], [4] and hybrid methods [5], [6]. A hybrid method allowing modular analysis has been proposed recently [7]. This method, called DG-FDTD/PO, consists of a hybridization of the Dual-grid FDTD (DG-FDTD) [8] with Physical Optics (PO).…”

On-going progress of SoftLAB benchmark in 2014

“…Among them, the hybridization of Iterative Physical Optics (IPO) with Dual-Grid Finite-Difference Time-Domain method (DG-FDTD) has been specially developed by IETR [6] to deal with surrounded antennas working over a large frequency bandwith. To do so, it combines a time-domain multilevel analysis of both the antenna and its closest environment (DG-FDTD simulation) with a high-frequency approach (IPO) for the more remote elements.…”