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Flexible inkjet-printed sensor platforms fabricated on flexible substrates are demonstrated to be a sustainable economical solution for 2D “Zero-Power” sensing and active energy harvesting applications as well as multilayer 3D structures and complete radar systems. Several designs featuring the advantages, challenges and prospects of inkjet printing technology are presented. These designs demonstrate...
Building ultra large scale wireless sensor networks (WSNs) requires very low-power and low-cost sensor designs. Backscatter radio is a communication scheme that can accommodate for these two constraints, as opposed to active radio architectures. For large scale applications, backscatter communication range extension is a necessity; for this, careful tag design has to be employed, in order to minimize...
A low-cost and disposable microfluidic-tunable bandstop filter is presented which is fabricated utilizing a novel inkjet-printing based microfluidics platform. The proposed bandstop filter is based on a split-ring-resonator (SRR) unit cell embedded within the ground of a co-planar waveguide (CPW) transmission line. By loading the capacitive gap of the SRR with an array of fluids with different permittivities,...
Polydimethylsiloxane (PDMS Sylgard 184) has become a popular substrate for stretchable electronics and conformal microwave devices in the 60-GHz band. In this communication we describe the fast prototyping and measurements of transmission lines and antennas at millimeter waves, based on the inkjet printing of silver nanoparticles inks on PDMS. The surface treatment of PDMS and the inkjet printing...
A novel technique for wirelessly transferring power over non-negligible distances is proposed and discussed in this document. In this technique the transfer of power is based on electrical coupling and resonance. In contrast, other systems proposed in the literature in the same class tend to make use of magnetic coupling. With prototypes measuring 16 by 16 cm by 3.7 cm at most it was possible to achieve...
A non-uniform C-section phaser is introduced as a powerful approach to enhance the design flexibility of uniform phasers. Moreover, an efficient synthesis technique is provided to design such phasers. Two design examples are presented. The first example is a single non-uniform C-section phaser. The second one is a cascaded double non-uniform C-section phaser featuring larger group delay swing and...
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