Wireless powering of sensors in free space and concrete medium

Author

Punjala, Shishir Shanker ; Makki, Kia

Author_Institution

Dept. of Electr. Eng., Florida Int. Univ., Miami, FL

fYear

2009

fDate

15-18 Feb. 2009

Firstpage

1

Lastpage

4

Abstract

The whole idea of this paper is to power sensors buried inside concrete at a certain depth by using a reconfigurable PIFA antenna and to power sensors in free space. The PIFA antenna inside concrete has to absorb power from the incident plane wave on the surface of concrete. Electric field which is incident on concrete would decay according to the parameters of concrete. The purpose of this paper is to show that an antenna with a fractal surface is an ideal choice to power a sensor inside concrete since the surface area is much larger. Any device in free space can by powered from the RF energy that its antenna receives from another antenna. Since the antenna is large we can make sure that more than one sensor could be powered by a single antenna at a single time inside concrete. Antennas in free space are powered based on the electric field on its surface. Reconfigurable antennas can be used for powering sensors for transmission from inside the surface of concrete which would provide a lot of advantages. Concrete was modeled in HFSS according to the parameters in previous research papers.

Keywords

electric fields; planar inverted-F antennas; wireless sensor networks; HFSS; concrete medium; concrete surface; electric field; free space; plane wave; reconfigurable PIFA antenna; sensor power; wireless powering; Building materials; Concrete; Conductivity; Dipole antennas; Equations; Frequency; Permittivity; Space technology; Surface resistance; Wireless sensor networks; Antenna; Electric field; Permittivity (ε); Power; Radiation resistance (Rr);

fLanguage

English

Publisher

ieee

Conference_Titel

Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting, 2009. ANTEM/URSI 2009. 13th International Symposium on

Conference_Location

Toronto, ON

Print_ISBN

978-1-4244-2979-0

Electronic_ISBN

978-1-4244-2980-6

Type

conf

DOI

10.1109/ANTEMURSI.2009.4805101

Filename

4805101