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Antenna theory and design
online, on-demand
J. Sebastian Gomez
University of California (USA)
This talk describes the concept and experimental demonstration of nonreciprocal phased-array antennas able to exhibit (i) an independent control of their transmission and reception patterns at the same operation frequency, and (ii) nonreciprocity at the polarization level, i.e., transmit with one polarization but receive with the opposite handedness. The proposed approach can be applied to develop efficient nonreciprocal phased-array antennas across the electromagnetic spectrum and find broad applications in wireless communication and polarimetric radar and sensing systems.
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17:45 Invited talk: Reconfigurable Intelligent Surfaces for Future Wireless Communication
Qammer H. Abbasi
University of Glasgow (United Kingdom)
A novel idea of a smart reflector that is gaining a lot of interest is the Reconfigurable Intelligent Surface (RIS) which operates by reflecting the waves in the same way as a backscattering device. It consists of planar, low cost, nearly passive elements that would smartly manipulate EM waves in specific directions. In this talk, I will discuss about the work on this topic in our group and different testbeds and their results.
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online, on-demand
Simone Genovesi (1), Francesco Alessio Dicandia (2)
(1)University of Pisa (Italy) , (2)Greenwaves (Italy)
The placement of a communication system on a three-dimensional platform always poses a series of problems that the antenna designer has to solve or mitigate for guarantee the desired functional operability. Among the several challenges, the need of compact and conformal radiators is one of the hardest tasks to accomplish, especially if working on objects whose dimensions are comparable to the wavelength of interest. The solution to this problem can be pursued by using the Characteristic Mode Analysis.
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18:25 Invited talk: Decentralized Wireless Coordination for Distributed Antenna Arrays
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Jeffrey Nanzer
Michigan State University (USA)
We present new approaches to wireless coordination of distributed antenna arrays using decentralized algorithms. Synchronization of the electrical states of elements in distributed arrays is necessary for distributed coherent operations such as beamforming. In large arrays, traditional centralized synchronization topologies yield susceptibilities to element failures and interference. Based on consensus averaging, we discuss new methods of synchronizing the relative phases and frequencies of distributed antenna array elements, and analyze the impact of residual errors on beamforming performance.
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18:45: Novel Sensing Technique for Non-destructive Composites Monitoring
Valentina Zhukova (1), Paula Corte-Leon (1), Aleksandra Allue (2), Koldo Gondra (2), Mihail Ipatov (1), Juan M. Blanco (1), Julian Gonzalez (1), Arcady Zhukov (1)
(1)UPV/EHU (Spain) , (2)Gaiker Technological Centre (Spain)
We observed evolution of the transmission and reflection parameters of the composites containing magnetic microwire inclusions during the composites matrix polymerization. A remarkable change of the reflection and transmission in the range of 4-7 GHz upon the matrix polymerization is observed. Obtained results are considered as a base for novel sensing technique allowing non-destructive and non-contact monitoring of the composites utilizing ferromagnetic glass-coated microwire inclusions with magnetic properties sensitive to tensile stress and temperature.
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