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—Liquid crystal polymer (LCP) is a material that has gained attention as a potential high-performance microwave substrate and packaging material. This investigation uses several methods to determine the electrical properties of LCP for millimeter wave frequencies. Microstrip ring resonators and cavity resonators are measured in order to characterize the(More)
—The use of digital television broadcasting standards has resulted in transmission of perpetually on wireless digital-TV signals over the air at wider bandwidths in ultrahigh-frequency bands for high-definition video and audio broadcasts to TV and smart phones. This paper presents a unique embedded wireless energy-harvesting prototype (E-WEHP) that exploits(More)
—In this paper, inkjet-printed UHF and microwave circuits fabricated on paper substrates are investigated for the first time as an approach that aims for a system-level solution for fast and ultra-low-cost mass production. First, the RF characteristics of the paper substrate are studied by using the microstrip ring res-onator in order to characterize the(More)
—This letter introduces for the first time the integration of a conformal radio frequency identification (RFID) antenna with a single-walled carbon nanotube (SWCNT) composite in a chip-less RFID node for toxic gas detection. The electrical performance characterization of the inkjet-printed SWCNT film is also reported for the first time up to 1 GHz. The(More)
—Flexible multi-layer inkjet printed capacitors that have a self resonant frequency above 3 GHz are demonstrated for the first time utilizing two custom formulated polymer-based dielectric inks. The formulation and characterization of both dielectric inks for optimal viscosity and film thickness are performed. The frequency dependent capacitance and quality(More)
This paper discusses the advantages of using inkjet-printed RFID circuits on flexible and paper substrates to provide low-cost and environmentally friendly RFID sensing at high frequencies. ABSTRACT | This paper discusses the evolution towards the first integrated radio-frequency identification (RFID)-enabled wireless sensor network infrastructure using(More)
—A novel miniaturized 3-D cubic antenna for use in a wireless sensor network (WSN) and RFIDs for environmental sensing is introduced. The antenna produces a truly omnidirec-tional pattern in both E-plane and H-plane, which allows for non-intermittent communication that is orientation independent. The frequency of operation lies in the UHF RFID band, 902(More)
The wireless measurement of various physical quantities from the analysis of the RADAR Cross Sections variability of passive electromagnetic sensors is presented. A millimetre-wave Frequency-Modulated Continuous-Wave RADAR is used for both remote sensing and wireless identification of sensors. Long reading ranges (up to some decameters) may be reached at(More)
Inkjet printing and additive manufacturing technologies (AMT) are introduced for the fabrication of flexible RF/microwave electronics and sensors. ABSTRACT | Inkjet printing on flexible paper and additive manufacturing technologies (AMT) are introduced for the sustainable ultra-low-cost fabrication of flexible radio frequency (RF)/microwave electronics and(More)