All-Dielectric Frequency Selective Surface for High Power Microwaves

• Published in: IEEE transactions on antennas and propagation Vol. 62; no. 7; pp. 3652 - 3656
• Main Authors: Barton, J. H., Garcia, C. R., Berry, E. A., May, R. G., Gray, D. T., Rumpf, R. C.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2014; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: All-dielectric; Antennas; Applied sciences; Bandwidth; Conductors; cross gratings; Devices; Diffraction, scattering, reflection; Exact sciences and technology; Frequency response; frequency selective surface (FSS); Frequency selective surfaces; Gratings; guided-mode resonance (GMR); Heating; high-power microwaves; Metals; Microwave devices; Microwave frequencies; Microwaves; Optimization; Radiocommunications; Radiowave propagation; Telecommunications; Telecommunications and information theory; Frequency selective surfaces; High power; high-power microwaves; Visual field; All-dielectric; Guided wave; cross gratings; Frequency response; Radiofrequency; frequency selective surface (FSS); Form factor; guided-mode resonance (GMR)
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2014.2320525

In this work, an all-dielectric frequency selective surface was developed for high power microwaves. By avoiding the use of metals, arcing at field concentration points and heating in the conductors was avoided. To do this in a compact form factor while still producing a strong frequency response, we based our design on guided-mode resonance (GMR). To make this approach viable for radio and microwave frequencies, we overcame three major challenges. First, conventional GMR devices have less than 1% fractional bandwidth and we extended this to 16%. Second, conventional GMR devices have a field-of-view less than 1 ° and we extended this to over 40 ° . Third, conventional GMR devices must be composed of hundreds of periods to operate, but our device operated very well with only eight. In this paper, we present our design and experimental results at 1.7 GW/m 2 .