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This paper presents spiral inductor fabricated by 3D additive manufacturing. The inductor was made with conductive epoxy silver based paste which was injected in spiral channel fabricated in polylactide (PLA) substrate (model) using additive manufacturing technology. The fabricated structure has value of effective inductance around 415 nH, maximum quality factor around 12 and outer dimension diameter...
A fully printable 3D stacked chipless RFID tag on a 50-μm thin polyimide film is presented. The tag consists of multi-layer cross-polarized dipole resonators which overlap. The data encoding is performed in the multiresonating circuit which is comprised of multiple stop band resonators. The resonators are printed using screen printing technology using a silver based conductive paste. The chipless...
In this paper, electrical properties of inkjet printed graphene patterns on a PET-based (Novele™ IJ-220) substrate are presented. Water-soluble graphene conductive ink (Phene plus I3015) was used. Tested samples were printed with up to 12 layers. Desktop inkjet printer with 2000 dpi resolution was used for printing. After that, structures were sintered at 100 °C for 30 minutes. Printed patterns surface...
This paper presents continued research on CPW (coplanar waveguide) meander inductors. The inductors were made in inkjet printing technology. They were printed on polyethylene terephthalate (PET) based substrate (Novele IJ-220), 140 µm thick. Water-based nanoparticle silver ink (Metalon® JS-B25HV) is used for printing. The fabricated inductors have a great value of quality factor (up to 4.2) and high...
This paper presents fully inkjet printed CPW (coplanar waveguide) octagonal inductor. The inductor was printed with water-based silver nanoparticle ink on flexible polyethylene terephthalate (PET) substrate. The fabricated structure has small outer dimension (8.5mm × 8.5mm), and value of effective inductance around 20 nH. Measured Q-factor is up to 1, and self-resonant frequency is slightly below...
This paper presents design, modeling and simulation cost-effective RFID (Radio Frequency Identification) tag using ink-jet printing technology. Passive 13.56 MHz RFID tag is based on an inductive-capacitive resonant circuit. Designed RFID tag is part of the ID (Identification) card, which has standard ISO ID1 size (85.60 mm × 53.98 mm). It consists of rectangular spiral planar inductor (antenna) and...
This paper describes a method for measuring strain on a specimen with flexible strain sensor. The sensor is made by ink-jet printing of silver ink on polyimide substrate, in that manner providing a combination of electrical conductivity and mechanical flexibility. When a force is applied on the free end of cantilever beam, three different strain gauges are used to measure flex of the beam. The gauge...
Development of a prototype low-cost semi-passive Radio Frequency Identification (RFID) tag that operates at 10 GHz in the X frequency band is presented. The tag is comprised of a dipole antenna, feed and matching network, a shunt Schottky diode modulator and a microcontroller with an in-built oscillator. The tag is powered by a 3V on-board battery and uses amplitude shift keying (ASK) modulation to...
Development of a prototype low-cost semi-passive Radio Frequency Identification (RFID) tag that operates at 10 GHz in the X frequency band is presented. The tag is comprised of a dipole antenna, feed and matching network, a shunt Schottky diode modulator and a microcontroller with an in-built oscillator. The tag is powered by a 3V on-board battery and uses amplitude shift keying (ASK) modulation to...
In this paper we present an ink-jet printed coplanar waveguide (CPW) inductors in flexible technology. We show design, fabrication, characterization and measurement technique of such devices. This is solution for ultra low-cost mass production. CPW inductors were developed as a technology for much simpler and faster fabrication on/in plastic foil. Structures are printed on Kapton substrate with polyamide...
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