Characterization of Antenna Design for Indoor RF Energy Harvesting
| Name | Year |
| Jing-Wei You | 2018 |
| Keywords | |
| energy harvesting, multipath channels, power transmission, ray tracing, rectennasenergy harvesting, multipath channels, power transmission, ray tracing, rectennas |
In this paper, the radiation features of radio-frequency (RF) energy-harvesting antennas are analyzed, and the design guidelines that enhance receiving power is proposed. It is acknowledged that an RF energy-harvesting antenna is desired to depict circular polarization (CP) and omnidirectional patterns, as ambient sources are omni-presented; however, the polarization features and half-power beamwidth (HPBW) of the antenna are inconclusive in earlier studies. To clarify the requirement of radiation characteristics, we analyze the receiving performance of six antennas with different HPBWs and polarizations. Our research methodology is a modified shooting-and-bouncing-ray technique, which traces multipath propagation in an indoor environment. These antennas are placed at different locations in a room, and the orientation angles are evenly and uniformly sampled. The receiving performance of each antenna is cast into cumulative density functions, which enable us to identify the antenna that provides the maximum amount of successful reception at a given energy-harvesting sensitivity. The simulated results are verified by performing measurement. Surprisingly, our results depict that CP and omnidirectional patterns cannot offer the most favorable receiving performance; in contrast, linear polarization and unidirectional patterns with a narrow HPBW are desired in most of the scenarios, even though the orientation angles have been uniformly sampled.
Publications
- Y.-S. Chen, F.-P. Lai, and J.-W. You, “Analysis of antenna radiation characteristics using a hybrid ray tracing algorithm for indoor WiFi energy-harvesting rectennas,” IEEE Access, vol. 7, no. 1, pp. 38833–38846, Dec. 2019.
- Y.-S. Chen and J.-W. You, “A scalable and multidirectional rectenna system for RF energy harvesting,” IEEE Trans. Compon. Packag. Manuf. Technol., vol. 8, no. 12, pp. 2060–2072, Dec. 2018.
- Y.-S. Chen and J.-W. You, “Investigation of antenna design for indoor WiFi energy scavenging,” in Proc. 13th Eur. Conf. Antennas Propag. (EuCAP 2019), Krakow, Poland, Apr. 2019, pp. 1‒5.
