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

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

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

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

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 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

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

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

A Matter of Faith: U.S. Cable News Coverage and Definitions of Terrorism

What makes an act of violence an act of terrorism? This qualitative study examines the ways in which three U.S.-based cable news networks--MSNBC, CNN, and Fox News--reported and contextualized four violent events within frameworks of terrorism: the mass shooting at Ft. Hood near Killeen, Texas (2009); the mass shooting near Tucson, Arizona (2011); a suicidal plane crash into an IRS building in Austin, Texas (2010); and the attempted bombing of the Federal Reserve in New York, New York (2012). Although details between these four events seem analogous, the three networks appeared to contextualize only the Ft. Hood rampage and the Federal Reserve plot within frameworks of terrorism (specifically, Islamic terrorism)--as being attacks on the United States rather than isolated incidents. In contrast, the networks appeared to contextualize the Tucson rampage and Austin plane crash as being the consequences of extreme mental illness. Existing literature suggests such disparities in coverage are the result of increasing consolidation and corporatization of news and entertainment media organizations, as well as pre-existing Orientalist portrayals of Arabs and misconceptions held by the American public about Islam and Muslims as both a minority and a religious group. Combined with standard journalism guidelines and suggestions for optimal practice during crisis coverage, this literature was used to establish a coherent code structure to analyze the four events. The code structure was used to review a total of 35 video clips from the aforementioned networks, making note of these references or topics of discussion: the terrorist attacks of September 11, 2001; the mental state of the perpetrator; the alleged religious or political affiliation of the suspected perpetrator; and any mention of Al-Qaeda or terms such as terrorist, jihad, infidel, or radical Islam. Although any discussion about news coverage of minorities is nuanced and merits further research, the results of this study indicate there is still much news organizations fail to understand about Islam, Muslims, the Muslim-American identity and the supposed relationship between those entities and terrorism or the root causes of its occurrence. Further, it indicates that news organizations experience a degree of cognitive dissonance when non-Muslims (or individuals affiliated with the dominant hegemonic culture) commit terrorism-like violence