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The paper presents a novel design for a circularly polarized square slot antenna (CPSSA). The antenna is fed by a coplanar waveguide. An asymmetric slot on the ground is applied to create the circularly polarized wave. By adding two orthogonal stubs embedded on the microstrip feeding-line, both the impedance bandwidth and the axial ratio bandwidth of antenna are increased. The results show that 3dB...
This article demonstrates how inkjet-printing of antennas/matching networks on low-cost paper-based materials can tackle all four challenges enabling the easy implementation of ubiquitous RFID and WSN networks by reviewing major milestones achieved in this area by this research group. It starts by discussing why paper should be used as a substrate for UHF/wireless inlays, followed by the dielectric...
The individual components comprising a low-cost, low-power, small-form-factor wireless sensor node for simultaneous ECG and temperature monitoring over wireless personal area networks of dramatically increased range, have been successfully designed, tested and presented. A circular patch antenna has been created that can be integrated, the substrate material of which has been chosen in order to optimize...
This paper introduces for the first time the capabilities of inkjet-printing technology in integrated wireless biosensors on organics bridging RFID and sensing technology. A novel flexible magnetic material is presented as an alternative substrate for wearable biosensors. There will be different platforms, including liquid antennas, with enhanced-range by utilizing multi-hopping algorithms with the...
This paper reports the first conformal RFID antenna printed on a flexible magnetic composite material for the UHF frequency band. The target applications are wearable RFIDs and bio-monitoring wireless probes. The successful implementation of the flexible magnetic composite material allows the tag miniaturization and provides excellent electrical performance in the 480 MHz band. First, the material...
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