Miniaturized quadrature coupler using low-cost instant inkjet printing technology

2017 ◽  
Vol 59 (8) ◽  
pp. 1819-1824 ◽  
Author(s):  
S. A. Babale ◽  
S. K. A. Rahim
Keyword(s):  
Inkjet Printing ◽  
Low Cost ◽  
Printing Technology ◽  
Inkjet Printing Technology

scholarly journals Fabrication and Evaluation of a Novel Non-Invasive Stretchable and Wearable Respiratory Rate Sensor Based on Silver Nanoparticles Using Inkjet Printing Technology

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1518 ◽  
Author(s):  
Ala’aldeen Al-Halhouli ◽  
Loiy Al-Ghussain ◽  
Saleem El Bouri ◽  
Haipeng Liu ◽  
Dingchang Zheng
Keyword(s):  
Silver Nanoparticles ◽  
Inkjet Printing ◽  
Human Subjects ◽  
Identical Condition ◽  
Low Cost ◽  
Good Mechanical Property ◽  
Clinical Practices ◽  
Healthy Human ◽  
Printing Technology ◽  
Inkjet Printing Technology

The respiration rate (RR) is a key vital sign that links to adverse clinical outcomes and has various important uses. However, RR signals have been neglected in many clinical practices for several reasons and it is still difficult to develop low-cost RR sensors for accurate, automated, and continuous measurement. This study aims to fabricate, develop and evaluate a novel stretchable and wearable RR sensor that is low-cost and easy to use. The sensor is fabricated using the soft lithography technique of polydimethylsiloxane substrates (PDMS) for the stretchable sensor body and inkjet printing technology for creating the conductive circuit by depositing the silver nanoparticles on top of the PDMS substrates. The inkjet-printed (IJP) PDMS-based sensor was developed to detect the inductance fluctuations caused by respiratory volumetric changes. The output signal was processed in a Wheatstone bridge circuit to derive the RR. Six different patterns for a IJP PDMS-based sensor were carefully designed and tested. Their sustainability (maximum strain during measurement) and durability (the ability to go bear axial cyclic strains) were investigated and compared on an automated mechanical stretcher. Their repeatability (output of the sensor in repeated tests under identical condition) and reproducibility (output of different sensors with the same design under identical condition) were investigated using a respiratory simulator. The selected optimal design pattern from the simulator evaluation was used in the fabrication of the IJP PDMS-based sensor where the accuracy was inspected by attaching it to 37 healthy human subjects (aged between 19 and 34 years, seven females) and compared with the reference values from e-Health nasal sensor. Only one design survived the inspection procedures where design #6 (array consists of two horseshoe lines) indicated the best sustainability and durability, and went through the repeatability and reproducibility tests. Based on the best pattern, the developed sensor accurately measured the simulated RR with an error rate of 0.46 ± 0.66 beats per minute (BPM, mean ± SD). On human subjects, the IJP PDMS-based sensor and the reference e-Health sensor showed the same RR value, without any observable differences. The performance of the sensor was accurate with no apparent error compared with the reference sensor. Considering its low cost, good mechanical property, simplicity, and accuracy, the IJP PDMS-based sensor is a promising technique for continuous and wearable RR monitoring, especially under low-resource conditions.

scholarly journals Low-Cost Inkjet Printing Technology for the Rapid Prototyping of Transducers

Sensors ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 748 ◽  
Author(s):  
Bruno Andò ◽  
Salvatore Baglio ◽  
Adi Bulsara ◽  
Teresa Emery ◽  
Vincenzo Marletta ◽  
...  
Keyword(s):  
Rapid Prototyping ◽  
Inkjet Printing ◽  
Low Cost ◽  
Printing Technology ◽  
Inkjet Printing Technology

scholarly journals Inkjet Printed Planar Coil Antenna Analysis for NFC Technology Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
I. Ortego ◽  
N. Sanchez ◽  
J. Garcia ◽  
F. Casado ◽  
D. Valderas ◽  
...  
Keyword(s):  
Inkjet Printing ◽  
Numerical Models ◽  
Low Cost ◽  
Near Field ◽  
Input Resistance ◽  
Skin Depth ◽  
Printing Technology ◽  
Planar Coil ◽  
Spiral Inductors ◽  
Inkjet Printing Technology

The aim of this paper is to examine the potential of inkjet printing technology for the fabrication of Near Field Communication (NFC) coil antennas. As inkjet printing technology enables deposition of a different number of layers, an accurate adjustment of the printed conductive tracks thickness is possible. As a consequence, input resistance andQfactor can be finely tuned as long as skin depth is not surpassed while keeping the same inductance levels. This allows the removal of the typical damping resistance present in current NFC inductors. A general methodology including design, simulation, fabrication, and measurement is presented for rectangular, planar-spiral inductors working at 13.56 MHz. Analytical formulas, computed numerical models, and measured results for antenna input impedance are compared. Reflection coefficient is designated as a figure of merit to analyze the correlation among them, which is found to be below −10 dB. The obtained results demonstrate the suitability of this technology in the fabrication of low cost, environmentally friendly NFC coils on flexible substrates.

scholarly journals Development of Novel Nano-Silver-Based Antenna for Green Agriculture

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Subitha D. ◽  
Vani R. ◽  
Raja A. ◽  
Balasubramani S. ◽  
Manjunathan A. ◽  
...  
Keyword(s):  
Inkjet Printing ◽  
Ph Value ◽  
Low Cost ◽  
Uv Curing ◽  
Green Technology ◽  
Printed Antenna ◽  
Printing Technology ◽  
Moisture Sensor ◽  
Inkjet Printing Technology ◽  
Very High

The designed antenna is a monopole Z-shaped antenna operating in an unlicensed band of 2.4 GHz fabricated using low cost inkjet printing technology. The proposed inkjet printing technology is eco-friendly since the material used here is an ordinary “paper” that is suitable for the green technology. The conducting patch of silver nanoparticle (AgNP) ink has very high conductivity 35,700,000 s/m and instant curing property which helps in fabrication process without UV curing or oven heating. The printer used also is the cheap home printer HP DJ 2130 rather than the expensive Brother and Epson printers used in previous works. The printed antenna will be helpful in conditions to ascertain its performance in green agriculture in the form of RF-ID sensors, soil pH value sensor, and moisture sensor. The proposed antenna attains the gain of 2.5 dBi at the ISM band of 2.4 GHz with optimal VSWR value between 1 and 2 over the desired frequency band. The directivity and radiation efficiency of the proposed antenna are 2 dBi and 80%, respectively. The overall cost of the proposed antenna is much lesser in the order of 10 times than the recent low cost design.

scholarly journals Inkjet-Printed Highly Conductive Poly(3,4-ethylenedioxythiophene): Poly(styrenesulfonate) Electrode for Organic Light-Emitting Diodes

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 889
Author(s):  
Yadong Liu ◽  
Juxuan Xie ◽  
Lihui Liu ◽  
Kai Fan ◽  
Zixuan Zhang ◽  
...  
Keyword(s):  
Inkjet Printing ◽  
Indium Tin Oxide ◽  
Light Emitting Diode ◽  
Low Cost ◽  
Large Area ◽  
Printing Technology ◽  
Light Emitting ◽  
Drop On Demand ◽  
Organic Light ◽  
Inkjet Printing Technology

Recently, inkjet printing technology has attracted much attention due to the advantages of drop-on-demand deposition, low-cost and large-area production for organic light-emitting diode (OLED) displays. However, there are still some problems in industrial production and practical application, such as the complexity of ink modulation, high-quality films with homogeneous morphology, and the re-dissolution phenomenon at interfaces. In this work, a printable poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) ink is developed and obtains an adjustable viscosity. Finally, a patterned PEDOT:PSS electrode is fabricated by inkjet printing, and achieves a high conductivity of 1213 S/cm, a transparency of 86.8% and a uniform morphology without coffee-ring effect. Furthermore, the vacuum-evaporated and solution-processed OLEDs are fabricated based on this electrode and demonstrate a current efficiency of 61 cd/A, which is comparable to that of the indium tin oxide counterpart. This work confirms the feasibility of inkjet printing technology to prepare patterned electrodes and expects that it can be used to fabricate highly efficient optoelectronic devices.

A Low-Cost Accelerometer Developed by Inkjet Printing Technology

2016 ◽  
Vol 65 (5) ◽  
pp. 1242-1248 ◽  
Author(s):  
Bruno Ando ◽  
Salvatore Baglio ◽  
Cristian O. Lombardo ◽  
Vincenzo Marletta ◽  
Antonio Pistorio
Keyword(s):  
Inkjet Printing ◽  
Low Cost ◽  
Printing Technology ◽  
Inkjet Printing Technology

Inkjet printing of vanadium dioxide nanoparticles for smart windows

2018 ◽  
Vol 6 (10) ◽  
pp. 2424-2429 ◽  
Author(s):  
Haining Ji ◽  
Dongqing Liu ◽  
Haifeng Cheng ◽  
Chaoyang Zhang
Keyword(s):  
Inkjet Printing ◽  
Vanadium Dioxide ◽  
Low Cost ◽  
Printing Technology ◽  
Smart Windows ◽  
Inkjet Printing Technology

A forefront and efficient VO2 inkjet printing technology is developed for low cost smart windows.

scholarly journals A Systematic Approach for the Design, Fabrication, and Testing of Microstrip Antennas Using Inkjet Printing Technology

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Yahiea Al-Naiemy ◽  
Taha A. Elwi ◽  
Haider R. Khaleel ◽  
Hussain Al-Rizzo
Keyword(s):  
Inkjet Printing ◽  
Systematic Approach ◽  
Microstrip Antennas ◽  
Optimal Number ◽  
Curing Temperature ◽  
Printing Technology ◽  
Simulation Tools ◽  
High Frequency Structure Simulator ◽  
Full Wave ◽  
Inkjet Printing Technology

We present a systematic approach for producing microstrip antennas using the state-of-the-art-inkjet printing technique. An initial antenna design based on the conventional square patch geometry is adopted as a benchmark to characterize the entire approach; the procedure then could be generalized to different antenna geometries and feeding techniques. For validation purposes, the antenna is designed and simulated using two different 3D full-wave electromagnetic simulation tools: Ansoft’s High Frequency Structure Simulator (HFSS), which is based on the Finite Element Method (FEM), and CST Microwave Studio, which is based on the Finite Integration Technique (FIT). The systematic approach for the fabrication process includes the optimal number of printed layers, curing temperature, and curing time. These essential parameters need to be optimized to achieve the highest electrical conductivity, trace continuity, and structural robustness. The antenna is fabricated using Inkjet Printing Technology (IJPT) utilizing Sliver Nanoparticles (SNPs) conductive ink printed by DMP-2800 Dimatix FujiFilm materials printer.

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