Inkjet Printing of Novel Wideband and High Gain Antennas on Low-Cost Paper Substrate

Abstract Recently, the three-dimensional (3D) printing technique has attracted much attention for creating objects of arbitrary shape and manufacturing. For the first time, in this work, we present the fabrication of an inkjet printed low-cost 3D temperature sensor on a 3D-shaped thermoplastic substrate suitable for packaging, flexible electronics, and other printed applications. The design, fabrication, and testing of a 3D printed temperature sensor are presented. The sensor pattern is designed using a computer-aided design program and fabricated by drop-on-demand inkjet printing using a magnetostrictive inkjet printhead at room temperature. The sensor pattern is printed using commercially available conductive silver nanoparticle ink. A moving speed of 90 mm/min is chosen to print the sensor pattern. The inkjet printed temperature sensor is demonstrated, and it is characterized by good electrical properties, exhibiting good sensitivity and linearity. The results indicate that 3D inkjet printing technology may have great potential for applications in sensor fabrication.

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A 300-GHz low-cost high-gain fully metallic Fabry–Perot cavity antenna for 6G terahertz wireless communications

Scientific Reports ◽

10.1038/s41598-021-87076-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Basem Aqlan ◽

Mohamed Himdi ◽

Hamsakutty Vettikalladi ◽

Laurent Le-Coq

Keyword(s):

Communication Systems ◽

Low Cost ◽

Frequency Selective Surface ◽

High Gain ◽

Wireless Communication Systems ◽

Beam Radiation ◽

Compact Size ◽

Fabry Perot ◽

Operating Bandwidth ◽

Polarization Level

AbstractA low-cost, compact, and high gain Fabry–Perot cavity (FPC) antenna which operates at 300 GHz is presented. The antenna is fabricated using laser-cutting brass technology. The proposed antenna consists of seven metallic layers; a ground layer, an integrated stepped horn element (three-layers), a coupling layer, a cavity layer, and an aperture-frequency selective surface (FSS) layer. The proposed aperture-FSS function acts as a partially reflective surface, contributing to a directive beam radiation. For verification, the proposed sub-terahertz (THz) FPC antenna prototype was developed, fabricated, and measured. The proposed antenna has a measured reflection coefficient below − 10 dB from 282 to 304 GHz with a bandwidth of 22 GHz. The maximum measured gain observed is 17.7 dBi at 289 GHz, and the gain is higher than 14.4 dBi from 285 to 310 GHz. The measured radiation pattern shows a highly directive pattern with a cross-polarization level below − 25 dB over the whole band in all cut planes, which confirms with the simulation results. The proposed antenna has a compact size, low fabrication cost, high gain, and wide operating bandwidth. The total height of the antenna is 1.24 $${\lambda }_{0}$$ λ 0 ($${\lambda }_{0}$$ λ 0 at the design frequency, 300 GHz) , with a size of 2.6 mm × 2.6 mm. The proposed sub-THz waveguide-fed FPC antenna is suitable for 6G wireless communication systems.

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Fabrication of Porous Silicon Based Humidity Sensing Elements on Paper

Journal of Sensors ◽

10.1155/2015/927396 ◽

2015 ◽

Vol 2015 ◽

pp. 1-10 ◽

Cited By ~ 12

Author(s):

Tero Jalkanen ◽

Anni Määttänen ◽

Ermei Mäkilä ◽

Jaani Tuura ◽

Martti Kaasalainen ◽

...

Keyword(s):

Porous Silicon ◽

Smart Cities ◽

Low Cost ◽

Electrical Characterization ◽

Fabrication Process ◽

Sensing Element ◽

Paper Substrate ◽

Roll To Roll ◽

Silver Electrodes ◽

Silicon Based

A roll-to-roll compatible fabrication process of porous silicon (pSi) based sensing elements for a real-time humidity monitoring is described. The sensing elements, consisting of printed interdigitated silver electrodes and a spray-coated pSi layer, were fabricated on a coated paper substrate by a two-step process. Capacitive and resistive responses of the sensing elements were examined under different concentrations of humidity. More than a three orders of magnitude reproducible decrease in resistance was measured when the relative humidity (RH) was increased from 0% to 90%. A relatively fast recovery without the need of any refreshing methods was observed with a change in RH. Humidity background signal and hysteresis arising from the paper substrate were dependent on the thickness of sensing pSi layer. Hysteresis in most optimal sensing element setup (a thick pSi layer) was still noticeable but not detrimental for the sensing. In addition to electrical characterization of sensing elements, thermal degradation and moisture adsorption properties of the paper substrate were examined in connection to the fabrication process of the silver electrodes and the moisture sensitivity of the paper. The results pave the way towards the development of low-cost humidity sensors which could be utilized, for example, in smart packaging applications or in smart cities to monitor the environment.

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Printing ultrathin graphene oxide nanofiltration membranes for water purification

Journal of Materials Chemistry A ◽

10.1039/c7ta06307e ◽

2017 ◽

Vol 5 (39) ◽

pp. 20860-20866 ◽

Cited By ~ 33

Author(s):

Mahdi Fathizadeh ◽

Huynh Ngoc Tien ◽

Konstantin Khivantsev ◽

Jung-Tsai Chen ◽

Miao Yu

Keyword(s):

Graphene Oxide ◽

Water Purification ◽

Inkjet Printing ◽

Low Cost ◽

Nanofiltration Membranes ◽

Highly Effective ◽

First Time ◽

Polymeric Supports ◽

Effective Water

We demonstrated for the first time that inkjet printing can be a low-cost, easy, fast, and scalable method for depositing ultrathin (7.5–60 nm) uniform graphene oxide (GO) nanofiltration membranes on polymeric supports for highly effective water purification.

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High Gain Low-Cost 20 GHz Antenna Design Based on the Utilization of Diffracted Fields from Dielectric Edges

10.1109/antem51107.2021.9519126 ◽

2021 ◽

Author(s):

Yazan Al-Alem ◽

Syed M. Sifat ◽

Yahia M. M. Antar ◽

Ahmed A. Kishk

Keyword(s):

Low Cost ◽

High Gain ◽

Antenna Design

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Direct Writing on Paper Substrate to Prepare Silver Electrode Structures for Flexible Sensors

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19523 ◽

2021 ◽

Vol 21 (12) ◽

pp. 6048-6053

Author(s):

Qi Wang ◽

Mingwei Li ◽

Yao Xie ◽

Yun Ou ◽

Weiping Zhou

Keyword(s):

Low Cost ◽

Rapid Development ◽

Silver Electrode ◽

Silver Nanostructures ◽

Direct Writing ◽

Paper Substrate ◽

Electronic Products ◽

Glass Substrates ◽

Different Temperatures ◽

Writing Technology

With the rapid development of the electronics industry, electronic products based on silicon and glass substrates electronic products will gradually be unable to meet the rising demand. Flexibility, environmental protection, and low costs are important for the development of electronic products. In this study, an efficient and low-cost method for preparing silver electrode structures by direct writing on paper has been demonstrated. Based on this method, a flexible paper-based sensor was prepared. The liquid printing ink used mainly comprises a precursor liquid without pre-prepared nanomaterials. The precursor liquid is transparent with good fluidity. Simple direct writing technology was used to write on the paper substrate using the precursor ink. When the direct-writing paper substrate was subsequently heated, silver nanostructures precipitated from the precursor liquid ink onto the paper substrate. The effect of different temperatures on the formation of the silver nanostructures and the influence of different direct writing processes on the structures were studied. Finally, a paper-based flexible sensor was prepared for finger-bending signal detection. The method is simple to operate and low in cost and can be used for the preparation of environment-friendly paper-based devices.

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