Theoretical study of interactions between antennas and metallic photonic bandgap materials

✍ Scribed by G. Poilasne; J. Lenormand; P. Pouliguen; K. Mahdjoubi; C. Terret; Ph. Gelin

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 228 KB
• Volume: 15
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19970820)15:6<384::aid-mop13>3.0.co;2-2

✦ Synopsis

In this paper, we present a technique, based on the principle of the frequency-domain con¨olution of a time-domain signature and a truncation window function, to process the electromagnetic field solution in a resonant structure deri¨ed by using the finite-difference ( ) time-domain FDTD algorithm. We show that the use of this technique enables us to substantially reduce the total number of iterations pro¨ided that certain criteria are imposed on the time and frequency resolutions, as well as on the Nyquist sampling rate. The con¨entional approach to terminating the time iteration is to employ a rectangular windowing ( ) RGW , which induces the unwanted Gibbs phenomenon in the frequency domain. To a¨oid this, we apply the Blackman᎐Harris window ( ) BHW function which modulates as well as truncates the computed time-domain electromagnetic signals. We demonstrate ¨ia a numerical experiment that the BHW modulation and truncation yield excellent results with only a small number of iterations, often only one-tenth of that needed in the RGW method.