scholarly journals New Configurations of Low-Cost Dual-Polarized Printed Antennas for UWB Arrays

2012 ◽  
Vol 2012 ◽  
pp. 1-10
Author(s):  
Guido Valerio ◽  
Simona Mazzocchi ◽  
Alessandro Galli ◽  
Matteo Ciattaglia ◽  
Marco Zucca
Keyword(s):  
Low Cost ◽  
Wide Band ◽  
Printed Antennas ◽  
Communications Systems ◽  
Radiating Element ◽  
Wide Range ◽  
Pattern Shape ◽  
Small Array ◽  
Parametric Analyses ◽  
And Control

A novel class of structures is proposed to realize ultra-wide-band radiating elements for large arrays, providing dual polarization, beam scanning, and compact and inexpensive realization based on suitable rhombic arrangements of dipoles printed on low-cost layered substrates. In a first implementation, four rhombic shapes, orthogonally placed on the same layer, provide two orthogonal polarizations. In a second implementation, the two polarizations are excited by two rhombic shapes printed on two different layers in a stacked-patch-like arrangement. This latter structure leads to a better lateral shielding of the single radiating element, in order to reduce mutual interactions among adjacent elements in array environment. The behavioral features of these antennas have been tested with various parametric analyses. Practical aspects have been addressed such as the choice of appropriate feeding and of commercially available dielectric layers. The resulting antennas are matched at the input ports in an extremely wide range of frequencies (5–25 GHz), covering various microwave applications, such as aircraft surveillance, weather polarimetric radars, and control and communications systems. Good radiating features, in terms of pattern shape and gain, are observed in a large band of frequencies. The basic scanning performance of large and small array configurations is finally investigated.

scholarly journals Information and information resources in COVID-19: Awareness, control, and prevention

2021 ◽  
pp. 096100062110165
Author(s):  
Mohammadhiwa Abdekhoda ◽  
Fatemeh Ranjbaran ◽  
Asghar Sattari
Keyword(s):  
Low Cost ◽  
Information Resources ◽  
Age And Gender ◽  
Use Of Resources ◽  
Strategic Approach ◽  
Wide Range ◽  
Data Collection Instrument ◽  
Control And Prevention ◽  
And Gender ◽  
And Control

This study was conducted with the aim of evaluating the role of information and information resources in the awareness, control, and prevention of COVID-19. This study was a descriptive-analytical survey in which 450 participants were selected for the study. The data collection instrument was a researcher-made questionnaire. Descriptive and inferential statistics were used to analyze the data through SPSS. The findings show that a wide range of mass media has become well known as information resources for COVID-19. Other findings indicate a significant statistical difference in the rate of using information resources during COVID-19 based on age and gender; however, this difference is not significant regarding the reliability of information resources with regard to age and gender. Health information has an undisputable role in the prevention and control of pandemic diseases such as COVID-19. Providing accurate, reliable, and evidence-based information in a timely manner for the use of resources and information channels related to COVID-19 can be a fast and low-cost strategic approach in confronting this disease.

Multi-Edged Wide-Band Rectangular Microstrip Fractal Antenna Array for C- and X-Band Wireless Applications

2016 ◽  
Vol 26 (04) ◽  
pp. 1750068 ◽  
Author(s):  
Jaspal Singh Khinda ◽  
Malay Ranjan Tripathy ◽  
Deepak Gambhir
Keyword(s):  
Return Loss ◽  
Low Cost ◽  
Ground Plane ◽  
Wide Band ◽  
Impedance Bandwidth ◽  
Network Analyzer ◽  
Fractal Antenna ◽  
Wireless Applications ◽  
X Band ◽  
Wide Range

A low-cost multi-edged rectangular microstrip fractal antenna (RMFA) yielding a huge bandwidth of 8.62[Formula: see text]GHz has been proposed in this paper. The proposed fractal antenna design constitutes a radiation patch, fed with 50[Formula: see text][Formula: see text] microstrip line and a partial ground plane. The partial ground plane is the combination of shapes of rectangle and three-point arc. The proposed antenna is simulated as well as fabricated. The simulated results using electromagnetic solver software and measured with vector network analyzer bench MS46322A are presented and compared. The various parameters such as return loss, voltage standing wave ratio (VSWR), antenna impedance, gain, directivity, group delay and phase of [Formula: see text], radiation efficiency and patterns are presented here. The depth of return loss is improved for a wide range of frequencies. The proposed fractal antenna is further extended to linear array to improve the gain and impedance bandwidth. The simulated and measured results prove the superiority of the proposed antenna.

scholarly journals Optimized and scalable synthesis of magnetic nanoparticles for RNA extraction in response to developing countries' needs in the detection and control of SARS-CoV-2

2020 ◽  
Author(s):  
Julio C. Chacón-Torres ◽  
C. Reinoso ◽  
Daniela G. Navas-Leon ◽  
S. Briceño ◽  
G. González
Keyword(s):  
Magnetic Nanoparticles ◽  
Low Cost ◽  
Rna Extraction ◽  
International Health ◽  
Private Companies ◽  
Wide Range ◽  
Chemical Availability ◽  
Scalable Synthesis ◽  
The Cost ◽  
And Control

Abstract Ecuador is one of the most affected countries, with the coronavirus disease 2019 (COVID-19) infection, in Latin America derived from an ongoing economic crisis. One of the most important methods for COVID-19 detection is the use of techniques such as real time RT- PCR based on a previous extraction/purification of RNA procedure from nasopharyngeal cells using functionalized magnetic nanoparticles (MNP). This technique allows the processing of ~10,000 tests per day in private companies and around hundreds per day at local Universities guaranteeing to reach a wide range of the population. However, the main drawback of this method is the need for specialized MNP with a strong negative charge for the viral RNA purification to detect the existence of the SARS-CoV-2 virus. Here we present a simplified low cost method to produce 10 g of nanoparticles in 100 mL of solution that was scaled to one litter by parallelizing the process 10 times in just two days and allowing for the possibility of making ~50,000 COVID-19 tests. This communication helps in reducing the cost of acquiring MNP for diverse biomolecular applications supporting developing country budgets constraints and chemical availability specially during the COVID-19 International Health Emergency.

Design and Control of a High Precision Laser-Cutting Machine

2018 ◽  
Author(s):  
Mason Van Bibber ◽  
Behnam Bahr
Keyword(s):  
Control Theory ◽  
High Precision ◽  
Laser Cutting ◽  
Mechanical Design ◽  
Low Cost ◽  
Cutting Machine ◽  
Mechanical Assemblies ◽  
Wide Range ◽  
Hands On Learning ◽  
And Control

Education in mechanical design and control theory is paramount to anyone interested in engineering and the “Maker” culture. Additionally, integration of concepts normally presented in discrete learning segments enhances technical and intuitive understanding of how systems work individually and together. This project aims to increase students’ understanding of engineering topics while equipping them with the necessary tools and information to recreate a high-precision laser-cutting machine at a minimal cost. These topics include electronic designs, mechanical assemblies, machine calibration, and control theory. Although there is a wide range of laser-cutting machines currently available, most low-cost options are inaccurate and low-quality. Because such systems come preassembled and with little documentation, using them offers no educational value with respect to learning how the system functions. Since pre-assembled systems offer little hands-on learning potential related to their construction and design, the goal of this project is to develop a system that will offer this experience and enhance student understanding as they “Learn by Doing.” Students learning about the aforementioned topics will investigate them by constructing their own low-cost and reproducible laser-cutting machine. This system will enable students to study how to combine the ideas and theories learned throughout their engineering curriculum into a single design.

scholarly journals Optimized and scalable synthesis of magnetic nanoparticles for RNA extraction in response to developing countries' needs in the detection and control of SARS-CoV-2

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Julio C. Chacón-Torres ◽  
C. Reinoso ◽  
Daniela G. Navas-León ◽  
Sarah Briceño ◽  
Gema González
Keyword(s):  
Magnetic Nanoparticles ◽  
Low Cost ◽  
Rna Extraction ◽  
International Health ◽  
Private Companies ◽  
Wide Range ◽  
Chemical Availability ◽  
Scalable Synthesis ◽  
The Cost ◽  
And Control

Abstract Ecuador is one of the most affected countries, with the coronavirus disease 2019 (COVID-19) infection, in Latin America derived from an ongoing economic crisis. One of the most important methods for COVID-19 detection is the use of techniques such as real time RT-PCR based on a previous extraction/purification of RNA procedure from nasopharyngeal cells using functionalized magnetic nanoparticles (MNP). This technique allows the processing of ~ 10,000 tests per day in private companies and around hundreds per day at local Universities guaranteeing to reach a wide range of the population. However, the main drawback of this method is the need for specialized MNP with a strong negative charge for the viral RNA extraction to detect the existence of the SARS-CoV-2 virus. Here we present a simplified low cost method to produce 10 g of nanoparticles in 100 mL of solution that was scaled to one litter by parallelizing the process 10 times in just two days and allowing for the possibility of making ~ 50,000 COVID-19 tests. This communication helps in reducing the cost of acquiring MNP for diverse biomolecular applications supporting developing country budgets constraints and chemical availability specially during the COVID-19 International Health Emergency.

Measurement and Comparison of Force Effort During Friction Stir Welding in a Parallel Kinematic 5-Axis Milling Machine

2012 ◽  
Author(s):  
Arun Prasath Manogaran ◽  
Guillaume Racineux ◽  
Jean-Yves Hascoet
Keyword(s):  
Friction Stir Welding ◽  
Low Cost ◽  
Milling Machine ◽  
Friction Stir ◽  
Advantages And Disadvantages ◽  
Measuring Devices ◽  
Wide Range ◽  
Dynamic Measuring ◽  
And Control

Friction stir welding (FSW) is so quite promising that leads it to one of the preferred joining process for a wide range of applications especially for Aluminum. FSW machines are very expensive. The objective is to develop a simple and low cost technique to measure and control the force during FSW in a milling machine. Measurement of forces during welding is a difficult task. Many dynamic measuring devices such as dynamometers are available but each have their own advantages and disadvantages. A new approach to measure force while performing weld is discussed. First, incorporation of FSW in PKM 5-axes milling machine is done. The head of the machine is modified to support higher force levels that are generated during FSW. With the help of the NC-Controller, the force values are retrieved from the axes of the machine while performing weld through actuators. Forces were also measured from load cell and compared to estimate the quality of measurement.

scholarly journals A Low-Cost, Highly Customizable Solution for Position Estimation in Modular Robots

2021 ◽  
pp. 1-10
Author(s):  
Chao Liu ◽  
Tarik Tosun ◽  
Mark Yim
Keyword(s):  
Low Cost ◽  
Complete Solution ◽  
Position Estimation ◽  
Modular Robots ◽  
Position Sensor ◽  
Position Sensing ◽  
Wide Range ◽  
Accurate Position ◽  
Estimation And Control ◽  
And Control

Abstract Accurate position sensing is important for state estimation and control in robotics. Reliable and accurate position sensors are usually expensive and difficult to customize. Incorporating them into systems that have very tight volume constraints such as modular robots are particularly difficult. PaintPots are a low-cost, reliable, and highly customizable position sensor, but their performance is highly dependent on the manufacturing and calibration process. This paper presents a Kalman Filter with a simplified observation model developed to deal with the nonlinearity issues that result from the use of low-cost microcontrollers. In addition, a complete solution for the use of PaintPots in a variety of sensing modalities including manufacturing, characterization, and estimation is presented for an example modular robot, SMORES-EP. This solution can be easily adapted to a wide range of applications.

scholarly journals Compact Ultra Wide Band Microstrip Bandpass Filter Based on Multiple-Mode Resonator and Modified Complementary Split Ring Resonator

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
J. Antonio Marcotegui ◽  
Jesús Miguel Illescas ◽  
Aritz Estevez ◽  
Francisco Falcone
Keyword(s):  
Communication Systems ◽  
High Performance ◽  
Ring Resonator ◽  
Low Cost ◽  
Wide Band ◽  
Split Ring Resonator ◽  
Ultra Wide Band ◽  
Split Ring ◽  
Complementary Split Ring Resonator ◽  
Wide Range

A new class of broadband microstrip filters for Ultra Wide Band (UWB) applications is proposed. In the design, different stages of parallel-coupled microstrip line and other stages with a Modified Complementary Split Ring Resonator (MCSRR)—a concept proposed here for the first time—are adjusted to obtain the desired response with broadband, sharp rejection, low insertion loss, and low return loss. Full wave simulation results as well as measurement results from fabricated prototypes are presented, showing good agreement. The proposed technique offers a new alternative to implement low-cost high-performance filter devices, applicable to a wide range of communication systems.

scholarly journals Design approach for wideband FM receiver using RTL-SDR and raspberry PI

2018 ◽  
Vol 7 (2.31) ◽  
pp. 9 ◽  
Author(s):  
P Satya Narayana ◽  
M N.V.S. Syam Kumar ◽  
A Keerthi Kishan ◽  
K V.R.K. Suraj
Keyword(s):  
Communication System ◽  
Software Defined Radio ◽  
Low Cost ◽  
Wide Band ◽  
Cost Effective ◽  
Raspberry Pi ◽  
Processing Unit ◽  
Capture Process ◽  
Band Frequency ◽  
Wide Range

Software defined radio replaced majority of hardware modules like mixers, filters, modulators and demodulators etc., with Software blocks in the field of radio electronics and communication. In this some or all the functionalities are Configurable using this software implemented on technologies like FPGAs, DSPs etc. Owing to lack of ease in implementing and reconfiguring huge hardware modules, we move on to implement an adaptable communication system with the help of SDR, as it can be easily configured to work with wide range of frequencies. We find various SDR transceiver modules which can be interfaced with digital computer and aided with firmware like GNU radio, SDR shark, etc., allowing us to construct blocks with the help of built in components that decode and process the received data and produce required output. In requirement of implementing a cost-effective, compact sized and portable system, we use a processing unit providing enough computational power to perform signal processing tasks which is Raspberry pi. Here we are going to implement a low cost SDR communication system that capture, process and visualize the Wide Band Frequency signal. 

High Sensitivity UV Photodetectors based on low-cost TiO2 P25-Graphene Hybrids

2021 ◽  
Author(s):  
Zilong Chen ◽  
Zhaowei Zhu ◽  
Liting Huang ◽  
Chuantong Cheng
Keyword(s):  
Low Cost ◽  
High Sensitivity ◽  
Wide Band ◽  
Oxygen Adsorption ◽  
Wide Band Gap ◽  
Strong Light ◽  
Optical Signals ◽  
Long Term Stability ◽  
Sensing Systems ◽  
Wide Range

Abstract Photodetectors (PDs) are the core component of multiple commercial optical sensing systems. Currently, the detection of ultra-weak ultraviolet (UV) optical signals is becoming increasingly important for wide range of applications in civil and military industries. Due to its wide band gap, low cost, and long-term stability, titanium dioxide (TiO2) is an attractive material for UV photodetection. A kind of low-cost TiO2 nanomaterial (named as P25) manufactured by flame hydrolysis is an easily available commercial material. However, a low-cost and high-sensitivity UV PD based on P25 has not been achieved until now. Here, a hybrid UV PD with monolayer CVD graphene covered by a thin film of P25 quantum dots was prepared for the first time, and its responsivity was approximately 105 A/W at 365 nm wavelength. The response time and recovery time of the UV PD were 32.6 s and 34 s, respectively. Strong light absorption and photocontrolled oxygen adsorption of the P25 layer resulted in high UV sensitivity. The UV PDs proposed in this work have great potential for commercialization due to their low cost and high sensitivity.

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