Radiation and Scattering from Antennas or Objects Within Advanced Artificial Materials.

9614469杨先进的人造复合材料的应用，其中光子带和带隙可以通过外部电流、电压偏置或光源来控制，要求植入体的大小和晶格常数至少与波长相当。对于这些情况，传统的有效媒介方法是不够的。在这项研究中，首次提出了一种用于模拟先进介质材料中的辐射体和散射体的双矢量积分方程组(DOVIE)方法。第一个积分方程式是求出植入物中由于源阵列而产生的电磁场。第二个积分方程式是求出天线或散射体上的电流或场。Dovie方法适用于具有异常的一般周期结构，并将允许研究涉及先进人造材料的印刷电路和天线的许多有趣的新现象。预期的应用包括具有高方向性、高增益、多功能和通过可控人造材料覆盖层引导波束的印刷天线；通过在毫米波集成电路上涂覆光子带隙材料涂层提供电磁屏蔽，其中导体在期望的频率范围内损耗太大(可能在集成电路中非常有用)；以及用于特殊集成电路部件的Dovie+CAD设计，如滤波器、定向耦合器和互连。

9614469YangApplications of advanced artificial composite materials, in which photonic bands and band-gaps can be controlled though an external current, voltage bias or light source, require that implant sizes and lattice constants be comparable to at least a wavelength. For these cases, conventional effective medium approaches are inadequate. In this research, a double vector-integral equation (DOVIE) method for modeling of radiators and scatterers within advanced dielectric materials is proposed for first time development and implementation. The first integral equation formulation is to find the electromagnetic fields within the implants due to an array of sources. The second integral equation formulation is to find the currents or fields at the antennas or scatterers. The DOVIE methodology applies to general periodic structures with abnormalities, and will allow investigation of many interesting new phenomena of printed circuits and antennas involving advanced artificial materials. Expected applications include printed antennas with high directivity, high gain, multifunctionality and beam steering through controllable artificial material overlay; electromagnetic shielding provided by photonic band-gap material coatings on millimeter wave integrated circuits in which the conductor is too lossy for a desired frequency range (potentially very useful in integrated circuits); and DOVIE + CAD design of specialty integrated circuit components such as filters, directional couplers and interconnects.