Compound solid state switches such as GaAs MESFETs and PIN diodes are widely used in microwave and millimeter wave integrated circuits (MMICs) for telecommunications applications including signal routing, impedance matching networks, and adjustable gain amplifiers. However, these solid-state switches have a large insertion loss (typically 1 dB) in the on state and poor electrical isolation in the off state. The recent developments of micro-electro-mechanical systems (MEMS) have been continuously providing new and improved paradigms in the field ....etc

[:=Read Full Message Here=:]

ABSTRACT
A surface micro machined capacitive switch has been designed and fabricated on a glass substrate. The switch is constructed of a thin metallic membrane crossing over an electroplated coplanar wave-guide transmission line. The electrostatic actuation is utilized as the switching mechanism. The actuation voltage is around 50V. The switch showed low insertion loss of 0.1 dB at 10 GHz and 0.4 dB at 25 dB, and isolation of 15dB at 20GHz. This device offers a potential application in tel ....etc

[:=Read Full Message Here=:]

i hav seminar on 20th so pls fwd the materials related to the topic mems rf switches.pls
to the mail id- [email protected] ....etc

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

INTRODUCTION
Compound solid state switches such as GaAs MESFETs and PIN diodes are widely used in microwave and millimeter wave integrated circuits (MMICs) for telecommunications applications including signal routing, impedance matching networks, and adjustable gain amplifiers. However, these solid-state switches have a large insertion loss (typically 1 dB) in the on state and poor electrical isolation in the off state. The recent developments of micro-electro-mechanical systems (MEMS) have been continuously providin ....etc

[:=Read Full Message Here=:]

micro electro mechanical switches ....etc

[:=Read Full Message Here=:]