Design and simulation of flexible jute antenna with performance validation on bending and soaking conditions

2020 ◽  
Vol 91 (1-2) ◽  
pp. 219-231
Author(s):  
M Pandimadevi ◽  
R Tamilselvi ◽  
M Parisa Beham
Keyword(s):  
Reflection Coefficient ◽  
Standing Wave ◽  
Patch Antenna ◽  
Low Cost ◽  
Search And Rescue ◽  
Network Analyzer ◽  
Abrupt Increase ◽  
Simulation Results ◽  
Performance Validation ◽  
Radio Location

Recently, there has been an abrupt increase in the integration of community antenna to flexible, textile and wearable applications. The proposed work introduces the design of a flexible wearable patch antenna using a jute fiber substrate for better performance. The antenna has been designed and simulated with jute substrate at the operating frequency of 3.23 GHz. The antenna has been fabricated and tested under normal, wet, on-hand and bending conditions using a vector network analyzer. The various parameters such as reflection coefficient parameter and voltage standing wave ratio of the fabricated antenna are measured and compared with the simulation results. The tested results show that the performance of the antenna under normal, wet, on-hand and bending conditions is almost approximately equal. Due to better performance in soaking and bending conditions as well as low cost and adequate availability of jute material, the proposed antenna can be used in various applications such as biomedical, military, radio location, ground radar, search and rescue applications, and more.

scholarly journals Enhancement of Bandwidth using Inset-Fed Patch Antenna for High Frequency Applications

2019 ◽  
Vol 9 (1) ◽  
pp. 1528-1531
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Low Cost ◽  
High Frequencies ◽  
Simulation Results ◽  
Ku Band

Today in communication field, many antennas have been evolved for various applications. The most popularly used antennas are micro-strip antennas. These antennas can be easily fabricated at reasonably low cost. Hence, these antennas are gaining lot of importance in recent times. Many techniques have been in use for micro strip antennas to improve the performance of the antenna parameters. The design of these antennas is slowly moving towards high frequencies, where there is lot of advantage with bandwidth. In this paper a normal and E shaped inset micro-strip antenna in Ku-Band is simulated and the results are presented. It is noted that CST-MS 2015 tool has been used to get the simulation results.

scholarly journals Hybrid Partition-Based Patrolling Scheme for Maritime Area Patrol with Multiple Cooperative Unmanned Surface Vehicles

2020 ◽  
Vol 8 (11) ◽  
pp. 936
Author(s):  
Jiajia Xie ◽  
Rui Zhou ◽  
Jun Luo ◽  
Yan Peng ◽  
Yuan Liu ◽  
...  
Keyword(s):  
Forest Fires ◽  
Low Cost ◽  
Search And Rescue ◽  
Unmanned Surface Vehicles ◽  
Planning Algorithm ◽  
Simulation Results ◽  
Path Planning Algorithm ◽  
The Given ◽  
Maritime Environment ◽  
Multi Robot

Multi-robot cooperative patrolling systems have been extensively employed in the civilian and military fields, including monitoring forest fires, marine search-and-rescue, and area patrol. Multi-robot area patrol problems refer to the activity that a team of robots works cooperatively and regularly to visit the key targets in the given area for security. Following consideration of the low cost and high safety of unmanned surface vehicles (USV), a team of USVs is organized to perform area patrol in a sophisticated maritime environment. In this paper, we establish a mathematical model considering the characteristics of the cooperative patrol task and the limited conditions of USVs. A hybrid partition-based patrolling scheme is proposed for a multi-USV system to visit targets with different importance levels in a maritime area. Firstly, a centralized area partition algorithm is utilized to partition the patrolling area according to the number of USVs. Secondly, a distributed path planning algorithm is applied to planning the patrolling path for each USV to visit the targets in a maritime environment to minimize the length of the patrolling path for the USV team. Finally, comparative experiments between the proposed scheme and other methods are carried out to validate the performance of the hybrid partition-based patrolling scheme. Simulation results and experimental analysis show the efficiency of the proposed hybrid partition-based patrolling scheme compared to several previous patrolling algorithms.

Design and Analysis of a Miniature Modular Inchworm Robot

2016 ◽  
Author(s):  
Wael Saab ◽  
Anil Kumar ◽  
Pinhas Ben-Tzvi
Keyword(s):  
Linear Expansion ◽  
Low Cost ◽  
Equations Of Motion ◽  
Search And Rescue ◽  
Linear Motion ◽  
Motion Modeling ◽  
Anisotropic Friction ◽  
Confined Spaces ◽  
Simulation Results ◽  
Friction Analysis

This paper presents the design and analysis of a bioinspired miniature modular Inchworm robot. Inchworm robots play crucial roles in surveillance, exploration and search and rescue operations where maneuvering in confined spaces is required. Rectilinear gaits have been demonstrated with favorable results in terms of stability and small size due to the absence of wheels and tracks; however, exhibit slow speeds. The proposed mechanism utilizes undulatory rectilinear gait motion through linear expansion/contraction of modules and anisotropic friction skin to produce pure linear motion. The use of anisotropic friction skin results in a simple, low cost, miniature mechanical structure. Friction analysis of the anisotropic material is performed and the system is modeled to derive its equations of motion. Modeling and simulation results are validated through experiments performed with an integrated prototype. Results indicate that the robot can achieves an average forward velocity of 11 mm/s on various surfaces.

scholarly journals Design of Dual Band Antenna with Defects on Patch and Ground for Wireless Applications

2019 ◽  
Vol 8 (2) ◽  
pp. 261-264
Keyword(s):  
Reflection Coefficient ◽  
Frequency Band ◽  
Patch Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Band Frequency ◽  
Wireless Applications ◽  
Rectangular Patch ◽  
Dual Band Antenna ◽  
Simulation Results

In this paper, a rectangular patch antenna with slits for dual band capabilities is presented. The suggested antenna works for two frequencies which are at 2.5 GHz and 5.1 GHz. The first operating frequency is in the band of 2.3 to 2.7GHz with -16.8dB reflection coefficient at 2.5GHz resonating frequency, whereas the second band is 4.6 to 5.5GHz with -29.2dB reflection coefficient at 5.1GHz resonating frequency. The simulation results exhibit that, the suggested antenna works for dual band frequency having impedance bandwidth of 482 and 844 MHz respectively. The gain is observed as 2.9 dBi and 4.2 dBi of respective bands. The first frequency band can be used for Industrial, Scientific and Medical(ISM) applications and second frequency band can be used for C-band applications.

scholarly journals A Microstrip Wireless Antenna Used By Capsule For Stomach Internal Photography

2020 ◽  
Vol 1 (1) ◽  
pp. 30-38
Author(s):  
Mayss Alreem Nizar
Keyword(s):  
Capsule Endoscopy ◽  
Patch Antenna ◽  
Digestive System ◽  
Return Loss ◽  
Low Cost ◽  
Wireless Capsule Endoscopy ◽  
Light Weight ◽  
Small Device ◽  
Simulation Results ◽  
Wireless Capsule

a wireless capsule endoscopy is small device used to examine the digestive system. The big challenge in the development of the capsule is how to get high date rate and also reduce the size of the capsule so micro strip antenna has been used which has several advantages such as small size, light weight, low cost. In this paper, UWB mini polygonal slotted patch antenna has been designed which has overall size of 10 X 10mm and bandwidth of 6GHz (5.5 – 11.5 GHz) .The simulation results for return loss (S11) has -26.32 at 6.6 GHz and voltage standing wave ratio (VSWR) at 1.09. The simulated radiation patterns are Omni-directional radiations over the UWB bandwidth. 

Hexagonal Nested Loop Fractal Antenna for Quad Band Wireless Applications

Frequenz ◽  
2019 ◽  
Vol 73 (3-4) ◽  
pp. 99-108
Author(s):  
Robert Mark ◽  
Nipun Mishra ◽  
Kaushik Mandal ◽  
Partha Pratim Sarkar ◽  
Soma Das
Keyword(s):  
Reflection Coefficient ◽  
Low Cost ◽  
Impedance Matching ◽  
Ground Plane ◽  
Fractal Antenna ◽  
Wireless Applications ◽  
Resonant Modes ◽  
Simulation Results ◽  
Nested Loop ◽  
Good Agreement

Abstract A compact hexagonal nested loop fractal antenna with L shaped slot on the ground plane is presented for multiband applications. In this paper, the effect of fractal iterations and position of L-slot on ground plane are optimized for better performance of the antenna. Multiple hexagon loops excite multiple resonant modes at 1.7, 2.4, 3.1, 4.5 and 6 GHz and an L-shaped slot on the ground plane helps to achieve wide bandwidth response with better impedance matching in the 4.25–6.41 GHz frequency band. An equivalent circuit of the proposed antenna is modelled and the same is verified using ADS. Reflection coefficient and radiation pattern are presented to further confirm the performance of the proposed design for wireless applications. The proposed antenna is fabricated on a low-cost FR4 substrate of dimensions 40×32×1.6 mm3 and measured results show good agreement with simulation results.

scholarly journals Design of P-shaped microstrip patch antenna for wireless communication systems

2019 ◽  
Vol 15 (2) ◽  
pp. 861 ◽  
Author(s):  
Raad H. Thaher ◽  
Noor Baqir Hassan
Keyword(s):  
Patch Antenna ◽  
Communication Systems ◽  
Ground Plane ◽  
Relative Dielectric Constant ◽  
Microstrip Patch Antenna ◽  
Wireless Communication Systems ◽  
Network Analyzer ◽  
Microstrip Patch ◽  
Operating Bandwidth ◽  
Simulation Results

A P-shaped microstrip patch antenna is proposed and studied to obtain operating bandwidth of (5.883-9.9) GHz. Then the antenna is extended by etching slots in the ground plane to be (5.73 – 10.234) GHz and gain varies from 2.809 dBi to 4.947 dBi. The antenna is installed on FR-4 substrate having relative dielectric constant of  = 4.3 and loss tangent of 0.02. The antenna size is (30×30×1.6)  simulation results were obtained using CST software 2016. The proposed was fabricated and tested by vector network analyzer VNA and noted reasonable agreement between simulated and measured result.

Study and design of dual stator permanent magnet machine with spoke-type configurations using phase-group concentrated-coil windings

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1381-1389
Author(s):  
Dezhi Chen ◽  
Chengwu Diao ◽  
Zhiyu Feng ◽  
Shichong Zhang ◽  
Wenliang Zhao
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
Low Cost ◽  
Dynamic Performance ◽  
Torque Ripple ◽  
Permanent Magnet Machine ◽  
Torque Density ◽  
Phase Group ◽  
High Torque ◽  
Simulation Results

In this paper, a novel dual-stator permanent magnet machine (DsPmSynM) with low cost and high torque density is designed. The winding part of the DsPmSynM adopts phase-group concentrated-coil windings, and the permanent magnets are arranged by spoke-type. Firstly, the winding structure reduces the amount of copper at the end of the winding. Secondly, the electromagnetic torque ripple of DsPmSynM is suppressed by reducing the cogging torque. Furthermore, the dynamic performance of DsPmSynM is studied. Finally, the experimental results are compared with the simulation results.

scholarly journals A Novel Electrically Small Ground-Penetrating Radar Patch Antenna with a Parasitic Ring for Respiration Detection

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 1930
Author(s):  
Di Shi ◽  
Taimur Aftab ◽  
Gunnar Gidion ◽  
Fatma Sayed ◽  
Leonhard M. Reindl
Keyword(s):  
Ground Penetrating Radar ◽  
Patch Antenna ◽  
Low Cost ◽  
Substrate Material ◽  
Geometric Parameters ◽  
Gas Explosions ◽  
Aerial Vehicle ◽  
Electromagnetic Characteristics ◽  
Ground Penetrating ◽  
Quick Search

An electrically small patch antenna with a low-cost high-permittivity ceramic substrate material for use in a ground-penetrating radar is proposed in this work. The antenna is based on a commercial ceramic 915 MHz patch antenna with a size of 25 × 25 × 4 mm3 and a weight of 12.9 g. The influences of the main geometric parameters on the antenna’s electromagnetic characteristics were comprehensively studied. Three bandwidth improvement techniques were sequentially applied to optimize the antenna: tuning the key geometric parameters, adding cuts on the edges, and adding parasitic radiators. The designed antenna operates at around 1.3 GHz and has more than 40 MHz continuous −3 dB bandwidth. In comparison to the original antenna, the −3 and −6 dB fractional bandwidth is improved by 1.8 times and 4 times, respectively. Two antennas of the proposed design together with a customized radar were installed on an unmanned aerial vehicle (UAV) for a quick search for survivors after earthquakes or gas explosions without exposing the rescue staff to the uncertain dangers of moving on the debris.

scholarly journals Single-Layer Line-Fed Broadband Microstrip Patch Antenna on Thin Substrates

Electronics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 37
Author(s):  
Roberto Vincenti Gatti ◽  
Riccardo Rossi ◽  
Marco Dionigi
Keyword(s):  
Patch Antenna ◽  
State Of The Art ◽  
Low Cost ◽  
Single Layer ◽  
Microstrip Antennas ◽  
Microstrip Patch Antenna ◽  
Layer Line ◽  
Limited Bandwidth ◽  
Microstrip Patch ◽  
Effective Design

In this work, the issue of limited bandwidth typical of microstrip antennas realized on a single thin substrate is addressed. A simple yet effective design approach is proposed based on the combination of traditional single-resonance patch geometries. Two novel shaped microstrip patch antenna elements with an inset feed are presented. Despite being printed on a single-layer substrate with reduced thickness, both radiators are characterized by a broadband behavior. The antennas are prototyped with a low-cost and fast manufacturing process, and measured results validate the simulations. State-of-the-art performance is obtained when compared to the existing literature, with measured fractional bandwidths of 3.71% and 6.12% around 10 GHz on a 0.508-mm-thick Teflon-based substrate. The small feeding line width could be an appealing feature whenever such radiating elements are to be used in array configurations.

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