A New Model of the Lifetime of Wireless Sensor Networks in Sea Water Communications

In this paper we present a new model for the lifetime of wireless sensor networks used for sea water communications. The new model for power communications takes into consideration parameters such as power consumption for the active mode, power consumption for the sleep mode, power consumption for the transient mode, transmission period, transient mode duration, sleep mode duration, and active mode duration. The power communications model is incorporated in the life time model of wireless sensor networks. The life time model takes into consideration several parameters such as the total number of sensors, network size, percentage of sink nodes, location of sensors, the mobility of sensors, power consumption when nodes move and the power consumption of communications. The new model for power consumption in communications shows more accurate results about the lifetime of the sensor network in comparison with previously published results

ECG Signal Transmissions Performance over Wearable Wireless Sensor Networks

AbstractSudden death is the most common disease of heart diseases and usually caused by cardiac arrest. The electrocardiograph (ECG) system is the most direct way to observe and monitor health status of the heart. In this kind of disease, the patient may need continuous monitoring, and sometimes is kept in Intensive Care Unit (ICU), which needs more utilities and manpower that will eventually leads to increase the cost and demands for qualified medical staff. In this paper we introduce a comprehensive real time monitoring ECG system for continuous monitoring patients inside/outside home. Wearable Wireless Sensor Network with a cluster head is connected to patient body for monitoring. Measured data by WWSS are transmitted via cluster head to an internet connection to the monitoring system located on the hospital. In case of emergency, the measured data is sent to the physician's cell phone for any necessary actions. We discuss the inside/outside system structure. Additionally, we analyze the proposed system in terms of power consumptions and optimum distance between WSN sensors

Effect of Temperature on the Performance of a Cylindrical Microstrip Printed Antenna for TM01 Mode Using Different Substrates

A temperature is one of the parameters that have a great effect on the performance of microstrip antennas for TM01 mode. The effect of temperature on a resonance frequency, input impedance, voltage standing wave ratio, and return loss on the performance of a cylindrical microstrip printed antenna is studied in this paper. The effect of temperature on electric and magnetic fields are also studied. Three different substrate materials RT/duroid-5880 PTFE, K-6098 Teflon/Glass, and Epsilam-10 ceramic-filled Teflon are used for verifying the new model for a microstrip antenna for its flexibility on cylindrical bodies

Effect of Curvature of the Conformal Microstrip Antenna

A comprehensive study of the conformal microstrip printed antenna is presented. The main advantages and drawbacks of a microstrip conformal antenna are discussed. The paper discusses both conformal microstrip arrays. The effect of curvature on the conformal microstrip antenna patch on conical and spherical surfaces is studied. New flexible antenna designs are given for different frequencies . Finally, simulation studies are carried out to study the effect of the curvature on the input impedance, return loss, voltage standing wave ratio, and resonance frequency

A New Analytical Performance Model for a Microstrip Printed Antenna

© ASEE 2012Curvature has a great effect on fringing field of a microstrip antenna and consequently fringing field affects effective dielectric constant and then all antenna parameters. A new mathematical model for input impedance, return loss, voltage standing wave ratio and electric and magnetic fields is introduced in this paper. These parameters are given for TM10 mode and TM01 mode Epsilam-10 ceramic-filled Teflon substrate material

Effect of Curvature on the Performance of Cylindrical Microstrip Printed Antenna for TM01 mode

Curvature has a great effect on fringing field of a microstrip antenna and consequently fringing field affects effective dielectric constant and then all antenna parameters. A new mathematical model for input impedance, return loss, voltage standing wave ratio and electric and magnetic fields is introduced in this paper. These parameters are given for TM01mode and using two different substrate materials RT/duroid-5880 PTFE. Experimental results are also introduced to validate the new model

Input Impedance, VSWR and Return Loss of a Conformal Microstrip Printed Antenna for TM01 Mode Using Two Different Substrates

Curvature has a great effect on fringing field of a microstrip antenna and consequently fringing field affects effective dielectric constant and then all antenna parameters. A new mathematical model for input impedance, return loss and voltage standing wave ratio is introduced in this paper. These parameters are given for TM01 mode and using two dif-ferent substrate materials K-6098 Teflon/Glass and Epsilam-10 Ceramic-Filled Teflon materials.https://doi.org/10.5923/j.ijnc.20120202.0

The Performance of a Cylindrical Microstrip Printed Antenna for TM10 Mode as a Function of Temperature for Different Substrates

A temperature is one of the parameters that have a great effect on the performance of microstrip antennas for TM10 mode at 2.4 GHz frequency range. The effect of temperature on a resonance frequency, input impedance, voltage standing wave ratio, and return loss on the performance of a cylindrical microstrip printed antenna is studied in this paper. The effect of temperature on electric and magnetic fields are also studied. Three different substrate materials RT/duroid-5880 PTFE, K-6098 Teflon/Glass, and Epsilam-10 ceramic-filled Teflon are used for verifying the new model

Conformal Microstrip Printed Antenna

© ASEE 2011In this paper, the comprehensive study of the conformal microstrip printed antenna is presented. The main advantages and drawbacks of a microstrip conformal antenna are introduced. The earlier researches in cylindricalrectangular patch and conformal microstrip array are summarized. The effect of curvature on the conformal Microstrip antenna patch on conical and spherical surfaces is studied. Some new flexible antenna is given for different frequencies. Finally, simulation software is used to study the effect of the curvature on the input impedance, return loss, voltage standing wave ratio, and resonance frequency

Virtual Wireless and Mobile Communication Laboratory

Creating a virtual laboratory for distance learning courses has become recently so important recently for engineering education. In this paper, we provide a full description for a remote access technique used in a wireless and mobile communication laboratory. Hence, the student will be able to perform experiments online and controlling and watching the devices by accessing a camera already built in the laboratory. Signal generator, spectrum analyzer and field-fox devices are used in the virtual laboratory.https://doi.org/10.5923/j.edu.20120201.0