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A compact wideband monopole antenna is proposed for IoT applications. The antenna consists of a microstrip feed line, a rectangular radiator and a ground plane. The main objective is to achieve a small size of the antenna by numerical optimization of all antenna parameters while maintaining the electrical characteristic of antenna at the acceptable level. The antenna design exhibits dimensions of...
We consider simulation-based sidelobe suppression, for pencil-beam planar arrays comprising individually fed microstrip antennas, realized by phase-only and position-only adjustment. The adjustment is carried out through numerical optimization of a discrete electromagnetic (EM) simulation as a high-fidelity model with the aid of a properly corrected fast array factor. Enhancement of sidelobe suppression...
A computationally-efficient procedure for multi-objective design of antennas is presented. Our approach is general; however, in the particular case study considered here, the goal is to improve the antenna gain while ensuring that the matching requirements are satisfied. Our approach exploits the multi-objective evolutionary algorithm (MOEA) working with a fast surrogate model of the antenna obtained...
Both radiation and reflection responses of ultrawideband (UWB) antennas are frequency dependent in general. Adjustment of geometry and material parameters of UWB antennas for a required impedance bandwidth has been extensively addressed in publications. Additional improvement of certain radiation figures of the UWB antennas is a more demanding problem which can be handled using simulation-based numerical...
A computationally-efficient procedure for multi-objective design of antenna structures is presented. Our approach exploits the multi-objective evolutionary algorithm (MOEA) working with a fast antenna surrogate model obtained with kriging interpolation of coarse-discretization simulation data. Response correction techniques are subsequently applied to refine the designs obtained by MOEA. Our methodology...
Adjustment of geometry parameters and performance optimization of dielectric resonator antennas (DRAs) is a challenging task that requires electromagnetic (EM) simulations. In particular, DRA design automation is problematic due to high computational cost of accurate, high-fidelity EM simulations; specifically, embedding the EM solver directly into the optimization algorithm (e.g., gradient-based)...
We present design of dielectric resonator antenna for the 2.4-to-2.5 GHz band installed on a printed circuit board with lower and upper metal ground. The antenna is directly fed by the coplanar waveguide. One of the objectives reached in the design process is reduction of the noise emitted by the antenna into the printed board. Conceptually it can be done with trough vias connecting the upper and...
Computationally efficient design optimization methodology for ultra-wideband (UWB) antennas is proposed. Our technique exploits space mapping with the underlying surrogate model built using kriging interpolation of the coarse-discretization EM simulation data. Robustness of the proposed approach is demonstrated through the design of two UWB planar antennas. In both cases, an optimized design is obtained...
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