... applications. A compact inkjet-printed UHF passive-RFID antenna using the classic T-match approach and designed to match IC's complex impedance, is presented as a demonstrating prototype for this technology. In addition ...
Wireless sensor networks (WSNs) have potential military, industrial, biomedical, environmental, and residential applications. However, implementing sensor networks and realizing their potential faces various challenges. Sensors nodes...
moreWireless sensor networks (WSNs) have potential military, industrial, biomedical, environmental, and residential applications. However, implementing sensor networks and realizing their potential faces various challenges. Sensors nodes should be small in size, ultra-low-power, and WSNs should be comprised of large quantities of sensor nodes [1][2]. These challenges emphasize the need for low-cost and eco-friendly substrates suitable for mass production of wireless
ABSTRACT Organic substrates is one of the leading solutions to realize ultra-low-cost and “green” wireless sensor applications. Inkjet printing on paper would be particularly economically appealing if commercial antennas could be replaced...
moreABSTRACT Organic substrates is one of the leading solutions to realize ultra-low-cost and “green” wireless sensor applications. Inkjet printing on paper would be particularly economically appealing if commercial antennas could be replaced with printed antennas with similar performance. This paper presents the replacement of an inkjet-printed, planar, inverted-F antenna (PIFA) for a conventional commercially available, three dimensional (3D) monopole used in a Smart Wireless Integrated Module (SWIM). Both the sensor layout and PIFA antenna are inkjet-printed on paper substrate, in a first successful step towards the implementation of a fully operational, fully planar wireless sensor on paper at Wi-Fi frequency (2.4 GHz).
In this paper, a dual-band conformal antenna for use in Wifi frequency bands is designed and developed using conductive inkjet printing technique. Paper as a high frequency substrate is used for low cost reasons. Discussion about the...
moreIn this paper, a dual-band conformal antenna for use in Wifi frequency bands is designed and developed using conductive inkjet printing technique. Paper as a high frequency substrate is used for low cost reasons. Discussion about the benefits of using inkjet printing is also provided. Measured results are presented showing a good agreement with theoretical ones.
ABSTRACT In this paper Single-Wall Carbon Nanotube (CNT) are examined for the design of a passive and maintenance-free wireless RFID sensor. CNT buckypaper is characterized from a dielectric and a sensititvity point of view, using an...
moreABSTRACT In this paper Single-Wall Carbon Nanotube (CNT) are examined for the design of a passive and maintenance-free wireless RFID sensor. CNT buckypaper is characterized from a dielectric and a sensititvity point of view, using an indirect way, by using antenna measurement and simulations in a controlled medium. A CNT-based prototype RFID tag is then described as the featured maintenance free sensor and experimentally verified for its applicability and sensitivity towards NH3.
ABSTRACT Intra-body electromagnetic propagation through dispersive tissue and studies of wireless power transmission have tended to focus on MHz frequencies due to relatively lower tissue absorption loss in this frequency range. Other...
moreABSTRACT Intra-body electromagnetic propagation through dispersive tissue and studies of wireless power transmission have tended to focus on MHz frequencies due to relatively lower tissue absorption loss in this frequency range. Other studies have focused on the 2.4GHz frequency. The Medical Implant Communication Service, a standard specified by the U.S. Federal Communications Commission, allows bi-directional radio communication between implantable devices using 401 and 406 MHz. Recent studies, however, have shown that frequencies in the low GHz range can be used for both bi-directional communication and wireless power transfer with the lowest absorption loss. This paper presents a preliminary study towards the development of an implantable module at 1.86 GHz. A Planar Inverted-F Antenna (PIFA) has been considered as the modules' antenna and in order to increase the inherently narrow bandwidth, a ground slot is used. The module demonstrates omni-directional radiation pattern, it is well matched at 1.86 GHz and it has 1.5 dBi gain. The module's antenna can be easily inkjet-printed on conformal materials such as paper and bio-compatible LCP.
ABSTRACT This paper discusses the evolution towards integrated RFID-enabled wireless sensor network infrastructure using UHF and microwave frequencies. Inkjet-printed technology on flexible paper substrates and the integration (assembly)...
moreABSTRACT This paper discusses the evolution towards integrated RFID-enabled wireless sensor network infrastructure using UHF and microwave frequencies. Inkjet-printed technology on flexible paper substrates and the integration (assembly) of sensors, wireless modules, discrete components and power sources is proposed as a solution for low-cost, light-weight, and environmental friendly method for RFID-enabled sensors and Wireless Sensor Nodes (WSN). Three examples are given to demonstrate the usability of such method: UHF RFID-enabled temperature sensor, Zigbee wireless module for location finding and sensing applications, and finally an RF- Certificate of Authenticity (RF-COA) for anti-counterfeiting applications.
A planar, low profile, low cost microstrip patch array antenna is developed in the millimeter-wave band for large gain applications. A simple edge feeding is used for a sub-array of 16x1 elements, and finally a matching network or power...
moreA planar, low profile, low cost microstrip patch array antenna is developed in the millimeter-wave band for large gain applications. A simple edge feeding is used for a sub-array of 16x1 elements, and finally a matching network or power divider/splitter is designed for a 32x16 elements with a gain of 27dBi for the design frequency of 79GHz and 26dBi at 80GHz. A method to reduce the slightly high "shoulder" radiation due to the feed network is introduced through a shielded feed.
