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Full-Text Articles in Electromagnetics and Photonics
Separation Distance Reduction In Mimo Systems Using End-Fire Antenna Arrays, Amean Al_Safi
Separation Distance Reduction In Mimo Systems Using End-Fire Antenna Arrays, Amean Al_Safi
Amean S Al_Safi
The main problem in Multiple Input-Multiple Output (MIMO) systems is the separation distance between antennas which must be greater than or equal to half wavelength. Satisfying this separation is difficult or impossible especially at mobile communication, therefore this paper study the capability to reduce these separation distance by using End-Fire antenna arrays. Each antenna at the transmitter and receiver side is replaced by a set of antennas work as an array with a radiation pattern directed toward the axes of the arrays. The separation between elements in these arrays is fixed at quarter wavelength in order to have one main …
Performance Of Polarization Diversity In A Linear Array Antenna, Amean S. Al_Safi
Performance Of Polarization Diversity In A Linear Array Antenna, Amean S. Al_Safi
Amean S Al_Safi
Multiple antennas systems require a separation distance between these antennas greater than or equal half wavelength. In this paper, we study the ability to reduce these separation distance by virtue of polarization diversity, i.e each two adjacent antenna replaced by one dual polarized antenna .The obtained results show that the use of polarization will reduce the required separation distance between antennas and the performance will be best, and these improvement will be more useful at the systems with greater number of antennas, increasing the correlation between antennas due to the separation angle will reduce the channel capacity. The results also …
The Effect Of Curvature Rate On The Received Power In Parabolic Reflector, Amean Al_Safi
The Effect Of Curvature Rate On The Received Power In Parabolic Reflector, Amean Al_Safi
Amean S Al_Safi
In this paper we study the effect of curvature rate on the generated electric field at the focus point if the frequency and diameter are constants .We assume that the incident electromagnetic waves distributed uniformly on each point of the reflector surface ;hence we can imagine that this reflector has uniform surface charge ,and this body will generate an electric field on all points in front of it (including the focus point) . This field can be obtained by using coulomb’s law .The derived expression for electric field show that X and Y components will vanish and the electric field …