Title :
A GA-based design of electromagnetic bandgap (EBG) structures utilizing frequency selective surfaces for bandwidth enhancement of microstrip antennas
Author :
Yeo, Junha ; Mittra, Raj ; Chakravarty, Sumit
Author_Institution :
Electromagn. Commun. Lab., Pennsylvania State Univ., University Park, PA, USA
Abstract :
We present a novel approach to improving the bandwidth of microstrip antennas using frequency selective surfaces (FSSs). The genetic algorithm (GA) is employed to derive an optimal FSS element configuration that achieves the zero-phase condition for the reflection coefficient of an artificial surface at the desired frequency band. We show that the use of such a surface, in lieu of the conventional PEC (perfect electrical conductor) ground plane, leads to an improvement in the bandwidth of planar antennas that are placed above the surface.
Keywords :
antenna radiation patterns; frequency selective surfaces; genetic algorithms; microstrip antennas; multifrequency antennas; photonic band gap; FSS; GA; bandwidth enhancement; dual-band antenna; electromagnetic bandgap structures; frequency selective surfaces; genetic algorithm; microstrip antennas; perfect electrical conductor; photonic band gap; planar antennas; radiation patterns; Bandwidth; Conductors; Dual band; Frequency selective surfaces; Metamaterials; Microstrip antennas; Patch antennas; Periodic structures; Photonic band gap; Reflection;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2002. IEEE
Print_ISBN :
0-7803-7330-8
DOI :
10.1109/APS.2002.1016108
