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In this paper we propose a new self-adjoint technique for sensitivity analysis with MoM solutions. This technique uses discrete perturbations of the optimizable shape parameters on a predetermined MoM grid. The purpose is to aid gradient-based optimization of antenna structures.
We present in this work some theoretical and experimental results of utilization of loop parasitic elements in wire (dipole) and planar (patch and monopole) antennas for increasing the impedance matching bandwidth. The antennas were analyzed using our programs, based on the numerical resolution of the electric field integral equation (EFIE) by the method of moments (MoM), and using the commercial...
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