No abstract

In this article, a highly robust antenna is proposed for omnidirectional circular polarized communications in harsh environments at 2.45 GHz industrial, scientific, and medical frequency band. Circular polarization is realized by utilizing a combination of two magnetic and electric dipoles. The proposed antenna is based on a transparent structure and covered by a quarter wavelength thick layer of plexiglass to achieve desired robustness and visible light transparency. Meanwhile, because of the high transparency of the glass, it can integrate with solar cells to simultaneously propagate signals and harvest energy. The average gain and bandwidth of the antenna are 1.7 dBic and 300 MHz, respectively. The antenna's axial ratio is achieved less than 3 dB within the bandwidth, showing circular polarization behavior. The proposed compact antenna is numerically and experimentally analyzed and the results have a great agreement. In another viewpoint, the structure delivers promising possibilities to improve the propagating and radiating properties, which bring in significant advantages for real‐world multifunctional applications.

No abstract

In this paper, a highly robust antenna for omnidirectional circular polarized communication in the harsh environment at 2.45 GHz ISM frequency band is proposed based on a transparent structure. Circular polarization has been realized utilizing a combination of two magnetic and electric dipoles. The antenna is covered with a quarter wavelength layer of plexiglass to achieve desired robustness and visible light transparency. Meanwhile, it can integrate with solar cells because of the high transparency of glass to simultaneously propagate signals and harvest energy. The gain and bandwidth of the antenna are 1.7 dBi and 300 MHz, respectively. The antenna's axial ratio is achieved less than 3 dB within the bandwidth showing circular polarization behavior. The proposed compact antenna is numerically and experimentally analyzed and compared together, having a suitable agreement. In another aspect, the structure can give promising openings to enhance the propagating properties, which could generate critical advantages for real-world multifunctional applications.