Technique for measuring the Dielectric constant using open ended coaxial cable in the
Thread Rating:
• 0 Vote(s) - 0 Average
• 1
• 2
• 3
• 4
• 5
 seminar surveyer Active In SP Posts: 3,541 Joined: Sep 2010 07-01-2011, 04:32 PM   Dielectric .ppt (Size: 248.5 KB / Downloads: 50) 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 distributution in an atom or molecules coincides with the centre of the negative charge distribution. The atoms or molecules do not have permanant dipole moment Dielectric constant = capacitence without dielectric over capacitence with dielectric Types of polarizations Definition: Dipole moment per unit volume is called Polarisation 3 types of polarisation 1.Dipole polarisation 2.Ionic polarisation 3.electronic polarisation Principle An electromagnetic wave of particular frequency passed through a coaxial probe to the sample, some part of the wave is transmitted and some part of the wave reflected. From the reflected signal we can get the reflection coefficient of that sample, from that we can get the corresponding impedance of that sample at that particular frequency From that impedance we can obtain the complex dielectric constant at that frequency Accurate determination of the frequency-dependent probe-end impedance in vacuum . Elimination of spurious impedances such as those due to connector mismatch Indeterminacy of probe parameters Accurate modeling of the probe-liquid interface impedance after the above problems are eliminated. Experimental data collection is described below step by step Open With the coax terminated by free space, the measurement plane of the ANA was moved to the coax end using the electrical delay provided. The delay, which corresponds to the length of the coax (typically 6-12 in), was adjusted to give a cluster of points near the real and imaginary parts. A short at the coax end was created by raising a small vessel (about 6 cc) filled with mercury, until the coax end was well within the liquid. This resulted in a cluster of points around the position [Re and Img parts. Standard Liquid At this point, the display was checked to ensure that the date returned to the configuration for an open. A cell (of volume typically <10 cc) with a standard liquid, usually acetone, was now inserted so that the coax end was well immersed in the liquid. The data ρc were again read into the computer.

Important Note..!

If you are not satisfied with above reply ,..Please

ASK HERE

So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page
 Tagged Pages: open ended coaxial cable, measurement of dielectric constant of cables, coaxial probe dielectric ppt seminar, coaxial probe dielectric ppt,
 Popular Searches: constant k lpf, coaxial probe dielectric ppt, constant pressure is applied on the management to improve competitiveness, constant torque, dielectric definition**splay abstract, project ideas about the holocaust ended download, types of constant pressure turbocharging,

Quick Reply
Message
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
 (case insensitive)

 Possibly Related Threads... Thread Author Replies Views Last Post Momentum Applications in Open Channel Flow study tips 0 428 29-05-2013, 02:42 PM Last Post: study tips Effect of Uv Radiation on Dielectric Constant And Thermal Conductivity In Epoxy Pheno seminar tips 0 410 30-11-2012, 05:38 PM Last Post: seminar tips Seismic Base Isolation Technique for Building Earthquake Resistance seminar ideas 4 2,058 12-11-2012, 12:17 PM Last Post: seminar tips Self-Calibrating Instrumented Tow Cable seminar flower 0 340 27-10-2012, 11:45 AM Last Post: seminar flower Constant Referactive Index Multi-Core Fiber Laser seminar flower 0 341 27-10-2012, 10:57 AM Last Post: seminar flower Technique for measuring the Dielectric constant using open ended coaxial cable in the seminar class 0 22,515 26-02-2011, 09:44 AM Last Post: seminar class