Metamaterials/Special Materials
Numerous materials exist that have unusual or frequency dependent properties. Using Remcom’s XFdtd software, simulations of devices containing these special materials may be performed.
Metamaterials include such items as negative index materials, electronic band gap structures and frequency selective surfaces. Special materials include frequency dependent models, anisotropic and ferrite materials, and computational extensions to the FDTD method such as sub-cellular thin wires and time-dependent switches.
追加情報
例
この例では、誘電体材料を、誘電率テンソルの対角の項でシミュレートする XFdtd の能力を示しています。ここでの事例は、平面波によって励起された異方性球からのバイスタティックレーダ断面の計算である。
XFdtd は周波数に依存した誘電体と磁性材料を含んでいるため、負のインデックス材料やメタマテリアルとも呼ばれる二重の負の材料の3次元計算を行うことができます。
A microstrip gap waveguide containing a mushroom-type EBG surface is simulated in XFdtd and compared to measured results.
A multiband frequency selective surface is built using a ternary tree loop and modified tripole in order to block multiple frequency bands. Simulation using periodic boundaries in XFdtd demonstrates the effectiveness of the proposed structure.
An anisotropic magnetized ferrite material is used in a microstrip circulator to isolate one port while providing output to the other.
An EBG reflector is used to improve the performance of a spiral antenna.