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In this paper, an integral equation domain decomposition method based on hybrid solvers (HS-DDM) are developed for modeling of electromagnetic radiation problems. Based on the philosophy of ‘divided and conquer’, the IE-DDM divides the original multi-scale problem into many closed non-overlapping sub-domains. The Robin transmission conditions ensure the continuity of the currents across adjacent sub-domains...
For electromagnetic wave scattering by composite conductor and dielectric objects, an efficient integral equation solver is imperative. In this letter, An enhanced preconditioned hybrid approach combining a nonconformal, nonoverlapping domain decomposition method (DDM) and electric/magnetic current combined-field integral equation (JMCFIE) is proposed. It provided a flexible method to decompose the...
The achievable performance of successive relay system will significantly degrade, if severe inter- relay interference (IRI) exist. In this paper, two beamforming methods are proposed for mitigating the IRI inflicted by multiple-input multiple-output (MIMO) assisted two-path successive relay nodes. More specifically, we exploit the additional degree of freedom offered by the spatial domain during the...
In this paper, an optimization technique combining non-conformal integral equation domain decomposition method (IE-DDM) and particle swarm optimization (PSO) is presented for the design of antenna on platform. The antenna and the platform can be decomposed into different closed sub-domains according to design requirements and the DDM is used to compute the scattering from antenna on platform. Meanwhile...
In this paper, a hybrid domain decomposition method with electric and magnetic current combined-field integral equation (JMCFIE) is present for modeling electromagnetic scattering problems involving composite structures. The method first decomposes the original problem into several sub-domains according to its geometry and dielectric parameters. JMCFIE serves as the sub-domain solver in which a well-posed...
This paper explores new applications for antenna impedance matching networks. It is seen that a tunable matching network can improve the cell phone system noise figure and total integrated sensitivity (TIS) by at ∼ 1 dB at 700 MHz – 3 GHz. The reason is that a mismatched low-noise amplifier has a higher noise figure and a lower gain than a noise-matched LNA, and therefore, a tunable matching network...
In this paper, a hybrid scheme named IE-DDM-MLFMA with Gauss-Seidel iteration is proposed to calculate the scattering from the perfect electric conductor body of translation. The computational body of translation can be partitioned into concentric non-overlapping subdomains. Each of integral equation systems are solved separately, thus reducing the complexity of the original problem. For the solution...
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