Biodegradable Dual Semicircular Patch Antenna Tile for Smart Floors

Abstract

A dual semi-circular microstrip patch antenna implemented on a biodegradable substrate is presented for operation in the [863-873]-MHz and [2.4-2.5]-GHz frequency bands. To cover these frequency bands, two semi-circular patches are compactly integrated onto a biodegradable cork tile, commonly found as support in laminate flooring, serving as a substrate. Thereby, the antenna tile may be seamlessly embedded as a sublayer of the floor structure. A higher-order mode is generated by applying via pins in the antenna topology, to produce a conical radiation pattern with a null at broadside and sectoral coverage in the vertical plane. As such, the concealed-floor antenna covers all azimuth angles of arrival in smart houses. The antenna performance is fully validated, also when the tile is covered by different PVC sheets. Owing to the supplementary design margins, the antenna impedance bandwidth remains covered. Moreover, the radiation patterns are measured in various elevation planes. In stand-alone conditions, a radiation efficiency and a maximum gain of 74.3 % and 5.8 dBi at 2.45 GHz and 48.1 % and 2 dBi at 868 MHz are obtained. Its omni-directional coverage in the horizontal plane, stable performance on the inhomogeneous and biocompatible cork substrate and for various inhomogeneous superstrates and its low-profile integration make the proposed antenna an excellent candidate for smart floors and smart houses.

Understanding UAV-Based WPCN-Aided Capabilities for Offshore Monitoring Applications

“…However, the recent advancements in bio-degradable electronics enable the devices to decompose naturally without polluting the environment [7]. They have the potential to change the above long-standing paradigm [7]- [9].…”

“…However, the recent advancements in bio-degradable electronics enable the devices to decompose naturally without polluting the environment [7]. They have the potential to change the above long-standing paradigm [7]- [9]. Indeed, miniature and low-cost bio-degradable maritime sensors allow to support temporary mission-specific deployments, while at the same time enable these sensors to be carried by the sea waves.…”

Conformal Integration of Efficient Conductive-Ink-Printed Antennas in Smart Suitcases for LPWAN-Based Luggage Tracking

“…More generally, antenna integration was demonstrated with a handbag by reusing its metallic zipper as a radiator [19]. Other designs were implemented on the body of a smartwatch [20], on tiles for smart floors [21], and on smart surfaces made of virtually any material [22], such as medium-density fiberboard (MDF).…”

High-Performance Air-Filled Multiband Antenna for Seamless Integration Into Smart Surfaces

“…However, this antenna does not exhibit multiband behavior. [25] presents a biocompatible dual-band patch antenna on cork for the integration in floor tiles, albeit with moderate peak gain (2.0 dBi at 868 MHz and 5.8 dBi at 2.45 GHz) and radiation efficiency (48.1% at 868 MHz and 74.3% at 2.45 GHz). Fine-tune TE (1) 330 mode by changing L & W An FTBR larger than 10 dB is desired for good antennaplatform isolation.…”