Angular Measurements and Analysis of the Indoor Propagation Channel at 60 GHz

In this work, we present a propagation measurements campaign conducted at 60 GHz in a typical indoor office environment. These measurements can be useful in order to exploit multipaths, aiming to maintain the quality of the communication in the case of blocking the direct path due to an obstruction created by people, furniture or other obstacles. The measurements were realized on 2 GHz bandwidth using a vector network analyzer (VNA). At the receiving side being always visible by the transmitter, a rotation by 6° over 360° is performed. The obtained results allow to compute different channel parameters such as: path loss, RMS delay spread and coherence bandwidth. In our study, we consider for each receiver position two situations: the direct orientation and the best indirect orientation of the receiving antenna. These results show that the path loss of the best indirect orientation increases up to 18 dB compared to the direct orientation. Indeed, some positions may be more affected than others in the case of blocking the direct orientation. The obtained results will be useful both to design the new broadband communication systems and to deploy wireless local and personal area networks (WLAN/WPAN) operating in the millimeter-wave (mmWave) bands.