An antenna is defined by Oxford Dictionary as ? a usually metallic device for radiating or receiving radio waves ?. The IEEE Standard Definitions of terms for Antennas ( IEEE Std 145-1973) defines the antenna or aerial as ? a means for radiating or receiving radio waves ?. In other words the antenna is the transitional structure between free-space and a guiding device. The guiding device or transmission line may take the form of a coaxial line or a hollow pipe (wave guide) and it is used to transport electromagnetic energy from the transmitting ....etc

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Abstract
The need of low-loss substrate materials with stable dielectric performances over a wide frequency range is a strong
requirement when working at millimeter frequencies, where standard dielectric substrates exhibit prohibitive losses. In
this contribution, the authors focus their attention on a polymer material, the benzocyclobutene (BCB), having a low
dielectric constant equal to 2.65, and a low loss tangent, equal to 0.0008 at 1 GHz, with a stable dielectric behavior
over a broad frequency range, up to THz. The use of BCB ....etc

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Ajaya Kumar Kavala
Research Scholar
Department of Physics
IIT Patna


Introduction of Dielectrics

Dielectric is an entity ,in which equal positive and negative charges separated by equal small distance.
In which each molecule has permanent dipole moment P
This type of materials are known as polar materials
Different molecules has different different directions of the dipole moment.
In Non polar materials ,The centre of the positive charge distribu ....etc

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An antenna is defined by Oxford Dictionary as “ a usually metallic device for radiating or receiving radio waves “. The IEEE Standard Definitions of terms for Antennas ( IEEE Std 145-1973) defines the antenna or aerial as “ a means for radiating or receiving radio waves ”. In other words the antenna is the transitional structure between free-space and a guiding device. The guiding device or transmission line may take the form of a coaxial line or a hollow pipe (wave guide) and it is used to transport electromagnetic energy from the tr ....etc

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The High frequency attenuation in shielded distribution cable has been extensively studied. But in the case of solid dielectric cable, this has not been done. A solid dielectric cable has a bit more complex structure including the semiconducting “bedding” layers and a moisture barrier.high frequency loss is created by these sources.The purpose of these bedding layers is to seal the cable against moisture ingress and also accomodate for the thermal expansion of the cable. The cables studied here are the ones with a corrugated copper sheat ....etc

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presented by;
Ajaya Kumar Kavala


Technique for measuring the Dielectric constant using open ended coaxial cable in the microwave frequency region
Introduction of Dielectrics
• Dielectric is an entity ,in which equal positive and negative charges separated by equal small distance.
• In which each molecule has permanent dipole moment P
• This type of materials are known as polar materials
• Different molecules has different different directions of the dipole moment.
• In Non polar materials ,The ....etc

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ABSTRACT
To achieve desirable biomimetic motion, actuators must be able to reproduce the important features of natural
muscle such as power, stress, strain, speed of response, efficiency, and controllability. It is a mistake, however, to
consider muscle as only an energy output device. Muscle is multifunctional. In locomotion, muscle often acts as an
energy absorber, variable-stiffness suspension element, or position sensor, for example. Electroactive polymer
technologies based on the electric-field-induced deformation of polymer d ....etc

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I AM MISS NIBEDITA DOING ENGINEERING WANT TO KNOW ABOUT THE TOPIC DIELECTRIC RESONANT ANTENNA. I WANT THE ABSTRACT AND FULL REPORT FOR SEMINAR.

THANKING YOU
NIBEDITA ....etc

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A TALK ON DIELECTRIC RELAXATION



INTRODUCTION OF DIELECTRIC


A dielectric is an electrical insulator that can be polarized by an applied electric field.

When a dielectric is placed in an electric field, electric charges do not flow through the material, as in a conductor, but only slightly shift from their average equilibrium positions causing dielectric polarization.

Because of dielectric polarization, positive charges are displaced toward the field and negative ch ....etc

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ABSTRACT

Low-k dielectrics are the very latest path breaking development in the field of Integrated Electronics. It is well on its way replacing the Al / SiO2 interconnects with the help of copper in CMOS fabrication of IC Chips. The CMOS technology has an in-built coupling capacitance which increases the time delay, thereby reducing associated processing speeds. This was compensated by reducing the thickness of the Al / SiO2 interconnects. There is a limit to the reduction in t ....etc

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