Automatic electromagnetic design for millimeter wave body sensors

We demonstrate a new strategy to design electromagnetic sensor based on particle swarm optimization (PSO) method. Unlike the traditional design process, which exploits the potentials of sensor geometry, type, and substrate parameter to improve the final performance, the proposed design strategy makes use of statistically optimization method to achieve a designer-free process. In this paper, we provide an example of a frequency selective surface (FSS) to demonstrate our idea. Given the bounded space of desired sensor size, the PSO program combined with a finite-difference time domain (FDTD) solver will automatically generate an arbitrary shaped FSS element. By assigning a periodical FDTD boundary condition, an infinitively large 2D FSS sheet can be obtained. The whole design process is fully automatic, which is expected to make the electromagnetic simulation work substantially easier.