Vol. 22

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Radiofrequency Performances of Transparent Ultra-Wideband Antennas

By Julien Hautcoeur, Franck Colombel, Xavier Castel, Mohamed Himdi, and Eduardo Motta Cruz
Progress In Electromagnetics Research C, Vol. 22, 259-271, 2011


In this paper, optically transparent ultra-wideband (UWB) monopole antennas in S-band and C-band 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.


Julien Hautcoeur, Franck Colombel, Xavier Castel, Mohamed Himdi, and Eduardo Motta Cruz, "Radiofrequency Performances of Transparent Ultra-Wideband Antennas," Progress In Electromagnetics Research C, Vol. 22, 259-271, 2011.


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