MH

M. Hajian

45 records found

For Accurate estimation of AOA of multiple sources an antenna array can be used. In this paper a comparison between the directions finding capability of three array geometries circular array, uniform- and non-uniform Y-shaped array are presented. the center frequency is 2.25 GHz ...
The key issue in the design of microstrip reflectarray antennas is the technique used to obtain the required phase shift in the field scattered by each element. Many solutions have been proposed in the past. Stub loaded patches, patches variable size and patches with variable rot ...
At microwave frequencies, the antenna beam scanning is commonly realized using phased array antennas. Such approach is expensive and very time consuming. As the frequency increases into the millimeter region, the complexity and the cost makes the realization of phased array anten ...
Spatial diversity techniques are advantageous if the received signals of the diversity branches are sufficiently uncorrelated. Theoretical study using the power unbalance between the two branches employing Laplacian direction of arrival (DOA) distribution is carried out. It is sh ...
Space-Time Coding (STC) was designed with restrictions. The first one is that it shoulb be applied to independent flat fading channels. If the flat fading condition is not satisfied time-delayed multipath channels will introduce intersymbol interference (ISI). In this paper a new ...