Search

In this paper, a new ultra-wideband antenna for microwave detection is proposed. Based on the circular patch, a 2-iteration fractal is constructed by the inner concentric circle and the regular quadrilateral. In order to achieve a wide frequency band, an equilateral triangular groove is created based on the regular quadrilateral patch. It has a compact size of $50^{\ast}50\ \text{mm}^{2}$ with the FR4 substrate thickness of 1.2 mm and dielectric constant of 4.4. The antenna bandwidth is 0.93GHz to 9.37GHz, covering L-band, S-band and C-band, which is used for WLAN and 2G / 3G / 4G mobile communication. The antenna exhibits omnidirectional radiation characteristics. The input impedance of the antenna is $50\Omega$ and the measured return loss over the entire bandwidth is greater than 10 dB.

The creation of new education technique for distance learning in smart sensor systems, which for the first time will be based on an organic joining of both advanced teaching approaches: e-learning and project-based learning is described in the paper. The project-based e-learning is based on novel, innovation research results obtained in the frame of FP6 programme Marie Curie Chairs Excellence (EXC) during the project Smart Sensors Systems Design (SMARTSES).