In this paper, a metamaterial absorber with checkerboard patterned ITO (indium tin oxide) film as the surface is obtained by using flexible and optically transparent wave-absorbing material ITO–PET (polyethylene terephthalate), coding arrangement of two basic units based on APS-PSO (Array Pattern Synthesis -Particle Swarm Optimization) algorithm. The structure consists rectangular patch structu...

This paper presents an simulation study using CST microwave studio. In this work very simple design are used based on metamaterial to construct perfect absorber. It is a semi-square copper loop placed top of dielectric layer separate from ground plate. structure provides two absorption region with peaks in average 99.98%. due dipole resonance the main and secondary diameter ring. addition, dime...

We are pursuing the development of a phononand ionization-mediated WIMP dark matter detector employing microwave kinetic inductance detectors (MKIDs) in the phonon-sensing channel. Prospective advantages over existing detectors include: improved reconstruction of the phonon signal and event position; simplified readout wiring and cold electronics; and simplified and more reliable fabrication. W...

This book chapter is based on the experimental activities conducted mainly at Sapienza University of Rome: Astronautic, Electric and Energetic Engineering Department in collaboration with University of Maryland, Institute for Research in Electronics and Applied Physics (IREAP). A branch of scientific research about composite materials is focused on electromagnetic characterization and subsequen...

This article presents a strategy for designing optimal microwave planar multilayer absorbers based on epoxy foam composites loaded with carbon fibers of 12 mm length. Firstly, the impedance gradient principle (gradual composites) was adopted to realize two absorbers, 125 thickness, using slightly (0.0125 wt% < CFs 0.075 wt%) and relative highly (0 0.4 wt%), respectively. The simulation these sh...

Tunable frequency is highly sought-after task of researcher, because of the potential for applications in selecting frequency, absorber, imaging and biomedical diagnosis. Here, we report the original observation of thermal frequency shift of dielectric relaxation in La/Nd doped BiFeO3 (BFO) in X-band from 300 to 673 K. It exhibits an unexpected result: the relaxation shifts to lower frequency w...