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Full-Text Articles in Engineering
Circular Polarized Leaky Wave Surface, Franklin Muriuki Manene, Brian A. Lail, Edward C. Kinzel
Circular Polarized Leaky Wave Surface, Franklin Muriuki Manene, Brian A. Lail, Edward C. Kinzel
Electrical Engineering and Computer Science Faculty Publications
A circular polarized (CP) infrared (IR) leaky wave surface design is presented. The metasurface consists of an array of rectangular patches connected by microstrip and operating over the long-wave infrared (LWIR) spectrum with directional wave emission and absorption. The surface is composed of periodically aligned arrays of sub-wavelength metal patches separated from a ground plane by a dielectric slab. The design combines the features of the conventional patch and leaky wave antenna leading to a metasurface that preferentially emits CP IR radiation by use of axial asymmetrical unit cells. This is a deviation from reported structures that mainly employ a …
Directional Thermal Emission From A Leaky-Wave Frequency-Selective Surface, Edward C. Kinzel, James Chris Ginn, Eric Z. Tucker, Jeffrey A. D'Archangel, Louis A. Florence, Brian A. Lail, Glenn D. Boreman
Directional Thermal Emission From A Leaky-Wave Frequency-Selective Surface, Edward C. Kinzel, James Chris Ginn, Eric Z. Tucker, Jeffrey A. D'Archangel, Louis A. Florence, Brian A. Lail, Glenn D. Boreman
Electrical Engineering and Computer Science Faculty Publications
We design, fabricate, and characterize a frequency-selective surface (FSS) with directional thermal emission and absorption for long-wave infrared wavelengths. The FSS consists of an array of patch antennas connected by microstrips, the ensemble of which supports leaky-wave-type modes with forward and backward propagating branches. The branches are designed to intersect at 9.8 μm and have a broadside beam with 20-deg full width at half maximum at this wavelength. The absorption along these branches is near unity. Measurement of the hemispherical directional reflectometer shows good agreement with simulation. The ability to control the spectral and directional emittance/absorptance profiles of surfaces has …
Frequency-Selective Surface Coupled Metal-Oxide-Metal Diodes, Edward C. Kinzel, Robert Laurent Brown, James Chris Ginn, Brian A. Lail, Brian A. Slovick, Glenn D. Boreman
Frequency-Selective Surface Coupled Metal-Oxide-Metal Diodes, Edward C. Kinzel, Robert Laurent Brown, James Chris Ginn, Brian A. Lail, Brian A. Slovick, Glenn D. Boreman
Electrical Engineering and Computer Science Faculty Publications
Metal-Oxide-Metal diodes offer the possibility of directly rectifying infrared radiation. To be effective for sensing or energy harvesting they must be coupled to an antenna which produces intense fields at the diode. While antennas significantly increase the effective capture area of the MOM diode, it is still limited and maximizing the captured energy is still a challenging goal. In this work we investigate integrating MOM diodes with a slot antenna Frequency Selective Surface (FSS). This maximizes the electromagnetic capture area while minimizing the transmission line length which helps reduce losses because metal losses are much lower at DC than at …