PROJECT TITLE :

A Method to Characterize the Frequency-Dependent Structural Coefficient of Antennas: Application to Millimeter Wave Identification

ABSTRACT:

The passive UHF RFID technology, well-known for the logistics and security applications, is a lot of and more thought-about for sensor networks and Internet of Things (IoT). Recent works have demonstrated the chance to take advantage of the main advantages of RFID within the millimeter-wave domain, giving rise to the millimeter wave identification (MMID) technology. This new technology uses the big out there ISM band from 57 to sixty six GHz in Europe. In backscatter Communications, like RFID or MMID, the radar cross section (RCS) may be a elementary parameter. The antenna RCS is defined as a function of its load and its structural coefficient. The structural coefficient that depends on the antenna geometry is usually approximated to unity in RFID as a result of tag antennas are typically thin dipoles compared to the wavelength. However, in MMID this approximation is not appropriate because of the employment of high directive antennas. This letter aims to propose a method to work out the structural coefficient of any varieties of antenna. The proposed approach is illustrated through the study of a horn antenna and a slotted waveguide antenna array in WR15 waveguide (from fifty to 75 GHz). Theoretical, simulation, and measurement results are compared and demonstrate the interest of the strategy.