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chapters:mttap:events2015 [2015/10/14 12:16]
konstanty Added July Meetings
chapters:mttap:events2015 [2015/10/14 12:18] (current)
konstanty Added August Event
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**Abstract: ** **Abstract: **
-    What is RF and Microwave Engineering: how and why it is different from low-frequency or optical engineering; what are its theoretical underpinnings; to what applications is microwave engineering put, and what makes microwaves particularly suitable, or even unique, in those applications; why is it necessary to study electromagnetic theory even if all you want to do is “just design circuits”.+What is RF and Microwave Engineering: how and why it is different from low-frequency or optical engineering; what are its theoretical underpinnings; to what applications is microwave engineering put, and what makes microwaves particularly suitable, or even unique, in those applications; why is it necessary to study electromagnetic theory even if all you want to do is “just design circuits”.
-    What are the Frontiers of the Field: what is the present state-of-the-art in this field, and the challenges for the future; what technological developments and newer applications are driving the future evolution of the field; what are some of the open research problems; how the practice of microwave engineering is likely to change in coming decades.+What are the Frontiers of the Field: what is the present state-of-the-art in this field, and the challenges for the future; what technological developments and newer applications are driving the future evolution of the field; what are some of the open research problems; how the practice of microwave engineering is likely to change in coming decades.
-    How does it Contribute to Quality of Life: how microwave engineering meets the human needs of communication, safety and security, decontamination and environmental remediation, health and biomedical applications, agriculture and food treatment; material processing; power generation and transmission; space exploration; material processing; and the generation, transport, and efficient utilization of electrical energy.+How does it Contribute to Quality of Life: how microwave engineering meets the human needs of communication, safety and security, decontamination and environmental remediation, health and biomedical applications, agriculture and food treatment; material processing; power generation and transmission; space exploration; material processing; and the generation, transport, and efficient utilization of electrical energy.
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 +==== August  17th ====
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 +**Seminar:** Different Dielectric Resonator Antenna Arrays
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 +**Speaker**:  Prof Ahmed Kishk, Concordia University, Canada
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 +**Abstract: **
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 +Abstract: Dielectric resonator antennas (DRAs) have attractive features such as small size, high radiation efficiency, wide bandwidth, and high power capability. These advantages made them attractive for use in different applications. Probe-fed dielectric resonator antenna arrays in an oversized dielectric loaded waveguide with hard horn excitation are investigated for their use in waveguide-based spatial power combining systems. The horn excitation could be considered as a space fed network for the dielectric resonators. A design of thin walled hard waveguide and hard horns are presented to provide uniform field distribution to provide uniform excitations for the array inside the hard structure. Design procedures for the special power combiner using the DRA are presented. The design starts from a single DRA inside a hard waveguide. A single dielectric resonator antenna element excited by a coaxial probe is analyzed first inside a hollow rectangular waveguide and a TEM waveguide to show the needs for the hard waveguide (TEM waveguide) to provide the uniform field distribution. Then, one-dimensional dielectric resonator antenna arrays are studied inside the H-plane sectoral hard horns. An entire spatial power combining system with a two-dimensional dielectric resonator antenna array is analyzed inside a hard pyramidal horn. The analysis of the entire system is based on the finite-difference time-domain method with region-by-region discretization and sub gridding schemes. All these designs are constructed by the student using very limited resources. Simulation results are compared with measurement results and show good agreement. Another design of wideband dielectric resonators system is analyzed and tested as a special power combiner. Use of the special power combiner as a space feed for a radiating array will also be considered. As still open research area hints for possible future work will be provided.
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Last modified: 14 October, 2015