akbar eslami
Elizabeth City State University, Technology, Faculty Member
A novel wideband dual polarized L-band antenna for NASA’s microwave remote sensing applications has been designed, fabricated, and validated. The novel antenna structure consists of a rectangular microstrip antenna excited by capacitive... more
A novel wideband dual polarized L-band antenna for NASA’s microwave remote sensing applications has been designed, fabricated, and validated. The novel antenna structure consists of a rectangular microstrip antenna excited by capacitive coupled four probes. One of the linear polarizations is obtained by feeding two diagonally opposite probes with equal but out of phase signals. Other orthogonal polarization is obtained by feeding other remaining probes with equal but out of phase signals. The novel structure provides the band width in excess of 500 MHz (with the center frequency of 1.3 GHz) and the cross polarization below -40 dB. For validation purpose, two prototype antennas were fabricated and tested. The test results collected show relatively good agreement with simulation results. For achieving wider band width, it is required to use, in our design, the probes with diameter larger than conventional coaxial connector. A novel feed structure using larger size cylindrical via is d...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
This research aims at describing a method to subjectively measure specific parameters in a wired or wireless network environment using the Simple Network Management Protocols for the purpose of improving Reliability, Maintainability, and... more
This research aims at describing a method to subjectively measure specific parameters in a wired or wireless network environment using the Simple Network Management Protocols for the purpose of improving Reliability, Maintainability, and Availability of the network devices. This is of importance in cases where the network is in remote or hard to access locations such as space, defense, or polar applications. Furthermore, the results can be used for troubleshooting and/or failure prediction of the network devices. Applications of health monitoring and prediction in network environments are expanding as are the networks.