Radiofrequency Performances of Transparent Ultra-Wideband Antennas

Abstract

Abstract-In this paper, optically transparent ultra-wideband (UWB) monopole antennas in S-band and Cband are presented, compared and discussed. Three transparent UWB antennas elaborated from the AgGL (Silver Grid Layer) material with various levels of transparency (54.5%, 73.4% and 80.3%) and of sheet resistances 0.018 Ω/sq, 0.022 Ω/sq and 0.052 Ω/sq, respectively are tested. The radiofrequency measurements show performances very close to those of a light reflecting reference antenna made of a continuous silver/titanium bilayer (0.0026 Ω/sq sheet resistance). Conversely, the fourth transparent antenna, made of usual transparent conducting oxide/metal multilayer presents significant ohmic losses and weak radiofrequency performances. The gains of the UWB AgGL antennas are similar to that of the reference antenna (∼ 6 dBi max.). Whereas the gain of the transparent multilayer antenna always stays ∼ 2 dB lower than that of the reference. This work demonstrates the relevance of AgGL coating in the fabrication of transparent UWB antennas with high radiation efficiency.

Improvement of 60 GHz Transparent Patch Antenna Array Performance Through Specific Double-Sided Micrometric Mesh Metal Technology

“…A mask aligner has been used for the photolithography step to provide a strong alignment between the radiating layer photomask and the pattern of the mesh ground plane fitted with the radiating layer footprint (antenna Array 2). And according to [18], each edge of the radiating layer photomask has to be bordered by a metal strip. Afterwards, stripping of the photoresist leaves the antenna Arrays 1 and 2 with a periodic array of apertures in the respective metal films.…”

Metal oxide nanoparticles and their applications in nanotechnology

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Design and experiments of transparent rectennas for wireless power harvesting

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