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The focus of this paper is to present a low profile, and highly efficient monopole antenna integrated with artificial magnetic conductor (AMC) using textile materials with a compact footprint for off-body communication in the industrial, scientific, and medical industrial, scientific and medical ISM-5.8 GHz band. In addition, effect of structural deformation in terms of antenna bending on the performance...
A miniaturized antenna design is proposed in this paper with size of 3.5 × 3.5 × 1.5 mm3 for biomedical sensors at low frequency, in low GHz range. The antenna's performance was studied on a layered tissue model, consisting of skin and fat layers. High and low dielectric constant substrates, Alumina 99.5% and Roger RT 5880, were used to observe to what extent the resonance frequency shifts to lower...
This paper focuses on the additive manufacturing of the antenna using biocompatible dielectric and conductive materials utilizing three-dimensional printing technology. An embedded dipole antenna was designed and simulated to operate at the frequency of 3.2 GHz to demonstrate the proposed technique. The designed antenna was fabricated using a desktop 3D printer. Dielectric substrate was made of FDA...
In this paper two methods of wireless power transfer for implanted biomedical devices are compared: inductive coupling and radiative transmission. Simulation models for both methods were developed and comparison was made in terms of power transmission efficiency at different spacing between the transmitter and receiver. The simulation results show that inductive coupling is more efficient than radiative...
This paper is focusing on suggesting realizing antennas using flexible Magneto-Dielectric (MD) materials for wearable applications. For proof of concept, different monopole antenna configurations are studied and their performances evaluated at 2.45 GHz. Monopole based MD antenna integrated a ground plane at a distance of 4 mm away from the antenna has showed a comparable performance to the monopole...
This paper presents experimental results for measuring respiratory rate using non-contact and low power system for health-monitoring applications. The system is based on a Doppler effect. A mechanical setup with controllable movement frequency and displacement was built to mimic the human chest movements while breathing. A Doppler radar system was used to measure the frequency of the proposed system...
This paper addresses a two-dimensional inverse scattering numerical technique for microwave imaging for breast cancer detection. We present an accurate and efficient way to obtain the location, shapes, and dielectric properties of malignant tumors inside the body. The accuracy of the reconstructed image is achieved because the dispersion properties and spatial heterogeneous characteristics of the...
Developing models that capture the spatial characteristics of wireless channels is vital for studying the performance of wireless communication systems particularly that exploit spatial processing receivers. In this paper, we propose an extension of the 2D model presented in [1] to the 3D case. We derive the joint cumulative distribution function (CDF) and the joint probability density function (pdf)...
An accurate knowledge of a communication channel is extremely important in designing radio systems since the performance of a receiver is highly dependent on the ability of predicting the wireless communication channel. Therefore, channel modeling has become a subject of intense research, nowadays [1], [2].
The focus of this paper is to present a low profile, and highly efficient monopole antenna integrated with artificial magnetic conductor (AMC) using textile materials with a compact footprint for off-body communication in the ISM 5.8 GHz band. In addition, effect of structural deformation in terms of antenna bending on the performance of monopole antenna with and without AMC reflector is examined...
Due to a recent growth in 3D printing technology, engineers are able to fabricate affordable and versatile antennas; however, poorly matched antenna terminations continue to limit the capabilities of 3D printed antennas. In this paper a 3D printed bowtie antenna is considered and 3D cable connectors are designed and their performance has simulated. The effect of printer resolution is examined to design...
Textile and flexible antennas are prone to stretch. This is especially important in spacesuit applications where the suit is pressurized. In this paper we propose a monopole textile antenna placed on a flexible electromagnetic band gap (EBG) ground that is made on flexible substrate. The antenna is designed for on-body communication system of spacesuit. The system is designed for 5.8 GHz band. In...
This paper describes a novel method for of three dimensional (3D) printed electromagnetic structures by using additive manufacturing (AM) technology with emphasis on the antenna as an essential component in every wireless communication system. To demonstrate this technique, a dipole antenna has been designed, simulated, and fabricated to work at the center frequency of 3 GHz. The substrate part of...
A swarm is a collection of objects or particles that are in co-ordination with each other. The concepts of swarm movement and communication is applied in a variety of applications such as traffic control or in military tactics. This paper applies swarm principles to a network of un-manned aerial vehicles (UAVs) in order to achieve optimal communication between each vehicle and to lower the amount...
Over 115 years ago Tesla invented the concept of wireless power transfer. Many industrial applications based on this technology have been developed ever since. This technology is of interest especially where the interconnecting wires are inconvenient, or even impossible. This paper provides a survey that describes the history of wireless power technology. Specifically two types of wireless power transfer,...
This article presents the design, simulation, manufacturing, and testing of textile patch antennas for spacesuit applications at the frequency 2.45 GHz. Antennas are designed for dispersed placement on two suit prototypes, NDX-1 and NDX-2, both external to the suit and mounted on the inner wall of a removable, thermal layer. Movement of the wearer, along with the necessity of compact transport and...
The concept of space solar power (SSP) satellites has been around since 1968 and is the vision of placing huge satellites (on the order of 1 square kilometer) into geostationary Earth orbit (GEO) to harvest gigawatts of the suns radiant energy and transmit it to Earth where it is collected and converted to usable direct current (dc) power by a rectifying antenna (rectenna) array (larger than the transmitting...
This paper presents the feasibility of conductive acrylonitrile butadiene styrene (ABS) materials in the fabrication of flexible three-dimensional (3D) antennas using additive manufacturing method. To demonstrate this application a bowtie antenna with coplanar waveguide (CPW) feed structure has been designed and measured. The prototype of the antenna has been fabricated using Makerbot® dual 3D printer...
Wearable textile antennas are of interest for utilization in space biomedical application since they may provide lighter and smaller form factor while they can integrated into space garment. In this paper we focus on the safety concerns and Specific Absorption Rate (SAR) evaluation of a compact wearable antenna system designed at operating frequency of 2.45 GHz in the Industrial, Scientific and Medical...
In this paper, performance of a monopole textile antenna integrated with a flexible Electromagnetic Band Gap (EBG) surface is presented. The integrated antenna is designed for operating within the 2.45 GHz Industrial, Scientific and Medical (ISM) band for space health monitoring applications. The goal was to increase the antenna gain, reduce the backward radiation toward the astronaut's body, and...
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