A time-domain hybrid method combining the finite-difference and physical-optics methods

Efficient Evaluation of Near-Field Time-Domain Physical-Optics Integral Using Locally Expanded Green Function Approximation

“…These quasi-analytical solutions can provide closed form solutions which contain physical interpretation of transient wave behavior. Furthermore, they also provide efficient and faster computation, more suitable solutions when pulse width is narrow compared with the geometrical dimensions of scattering object, and feasibility to implement a hybrid solution by combination with various time domain methods such as FDTD [4,5].…”

Hardware-software complex for research of absorption spectrum of blood in decimetre band

“…This limitation results from dramatically increase in the computer resources when the structure under investigation becomes larger. In the above context, a hybrid technique combining FDTD with physical optics (PO) has received increased attention in recent years [2], [3], [4]. The high frequency asymptotic technique, such as PO, is widely used for large, smooth, conducting bodies where linear dimensions and local radius of curvature of the structure are large compared to wavelength.…”

“…The high frequency asymptotic technique, such as PO, is widely used for large, smooth, conducting bodies where linear dimensions and local radius of curvature of the structure are large compared to wavelength. Such a hybrid approach combining FDTD with Time Domain Physical Optics (TDPO) [5] is considered and used to study antenna (without dielectric scatterers) mounted near/on relatively large conducting platforms [2], [3]. The similar technique, where additionally mutual couplings between FDTD and PO domains are taken into account, is considered for scattering problems [4].…”

Rigorous analysis of a satellite antenna including its surrounding environment with the Dual-Grid FDTD method

“…Several works have been reported to overcome this limitation by coupling those full-wave techniques with asymptotic approaches such as Physical Optics (PO) or Physical Theory of Diffraction (PTD) [5,6]. The approach faces two main difficulties when dealing with the nearby environments.…”