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A novel EBG structure to improve isolation in MIMO antenna
(Institute of Electrical and Electronics Engineers, 2017) Altaf, Ahsan; Alsunaidi, Mohammad; Arvas, Ercüment
A new, and advanced Electromagnetic Band Gap (EBG) structure is reported to reduce the mutual coupling between two tightly spaced rectangular patch antennas. The EBG structure provides more than 20 dB reduction in mutual coupling without degrading far-field patterns, gain, or bandwidth.
Analysis of oxygen absorption at 60 GHz frequency band
(Institute of Electrical and Electronics Engineers Inc., 2019) Arvas, Müberra; Alsunaidi, Mohammad
In this paper, analysis of atmospheric attenuation due to oxygen absorption of 60 GHz band signals is presented. The analysis is based on a time-domain simulation model that incorporates medium dispersion properties. For this purpose, a multi-pole material dispersion model of oxygen absorption is developed based on available experimental data. The simulation algorithm is based on the auxiliary differential equation (ADE) finite difference time domain (FDTD) technique which implements the general polarization formulation and uses the rotating boundary conditions to allow for long propagation distances. The results are useful in the prediction of propagation power loss such that methods for compensation can be devised.