|
Server : Apache/2.4.62 System : FreeBSD fbsdweb2.web.rcn.net 14.1-RELEASE FreeBSD 14.1-RELEASE releng/14.1-n267679-10e31f0946d8 GENERIC amd64 User : www ( 80) PHP Version : 8.3.8 Disable Function : NONE Directory : /domains/remotesensing/research/ |
Upload File : |
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<!-- adapted from a Design by: <a href="http://businesswebsitetemplates.blogspot.com"title="free templates">FREE BUSINESS TEMPLATES</a> -->
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta name="keywords" content="GPS, GNSS, Software, Hardware, Research and Development, R&D, Navigation, Signal Simulator, Signal Generator, Receiver, Simulator, Emulator, Transceiver, Front End, RF, Impulse, Real Time, SigSim, Data Acquisition, Galileo, Glonass, UTC, Ultra Tightly Coupled, INS, Ionospheric Receiver, Pseudolite, Radar, Software Radar, Radio, Software Radio, HF Diagnostics, Microwave Rain Gauge, Data Logger, EM Sensor, Jammer, Antenna, FPGA, DSP, High Performance Board, Suman Ganguly, Virginia, Fairfax, SBIR, Small Business, Engineering, Electromagnetics, Signal Processing, Space Weather, Instrumentation, Electronics, Analyzers, Surveillance, Computer Systems, Image Processing, Material Science, Microwave, Electrical Engineering, Electronics Engineering, Upconverter, Downconverter, LNA, L1, L2, L5, C/A, P-Code, Encryption, Ionospheric Sounder, Sounder, spoofer, EW, electronic warfare, C3I, Signal Analyzer, Signal Processor, ST Radar, MST Radar, IST Radar, SAR, GPS Receivers, GNSS Receivers, GPS Simulators, GNSS Simulator, Rain Radar, Ultra Wide Band Radar, Ground Penetrating Radar, HF Radar, Ionosonde, HF Diagnostic, OTH Radar, Satellite Simulator, Communication Simulator, Channel Simulator, Radar Simulator, Attitude Determination, Anti-Jam Receiver"/>
<title>CRS | Research & Development | Electromagnetics | Plasma Antenna</title>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="wrapper">
<div id="header">
<div id="logo">
<img src="images/crslogo.png" class="floatTL" alt="business" /><br><br><br><br><br>
<div id="nav">
<!-- Css Menu -->
<style>
ul.cssMenu ul{display:none}
ul.cssMenu li:hover>ul{display:block}
ul.cssMenu ul{position: absolute;left:-1px;top:98%;}
ul.cssMenu ul ul{position: absolute;left:98%;top:-2px;}
ul.cssMenu,ul.cssMenu ul {
margin:0px;
list-style:none;
padding:0px 1px 1px 0px;
background-color:#13264d;
background-repeat:repeat;
border-color:#A6A6A6;
border-width:0px;
border-style:solid;
}
ul.cssMenu table {border-collapse:collapse}ul.cssMenu {
display:block;
zoom:1;
float: right;
}
ul.cssMenu ul{
width:197.4px;
}
ul.cssMenu li{
display:block;
margin:1px 0px 0px 1px;
font-size:0px;
}
ul.cssMenu a:active, ul.cssMenu a:focus {
outline-style:none;
}
ul.cssMenu a, ul.cssMenu li.dis a:hover, ul.cssMenu li.sep a:hover {
display:block;
vertical-align:middle;
background-color:#13264d;
border-width:0px;
border-color:#FCEEB0;
border-style:solid;
text-align:left;
text-decoration:none;
padding:5px;
_padding-left:0;
font:12px Arial;
color: #ffffff;
text-decoration:none;
cursor:pointer;
}
ul.cssMenu span{
overflow:hidden;
}
ul.cssMenu li {
float:left;
}
ul.cssMenu ul li {
float:none;
}
ul.cssMenu ul a {
text-align:left;
white-space:nowrap;
}
ul.cssMenu li.sep{
text-align:left;
padding:0px;
line-height:0;
height:100%;
}
ul.cssMenu li.sep span{
float:none; padding-right:0;
width:3;
height:100%;
display:inline-block;
background-color:#A6A6A6; background-image:none;}
ul.cssMenu ul li.sep span{
width:100%;
height:3;
}
ul.cssMenu li:hover{
position:relative;
}
ul.cssMenu li:hover>a{
background-color:#93AEE6;
border-color:#4C99AB;
border-style:solid;
font:12px Arial;
color: #FFFFFF;
text-decoration:none;
}
ul.cssMenu li a:hover{
position:relative;
background-color:#93AEE6;
border-color:#4C99AB;
border-style:solid;
font:12px Arial;
color: #FFFFFF;
text-decoration:none;
}
ul.cssMenu li.dis a {
color: #AAAAAA !important;
}
ul.cssMenu img {border: none;float:left;_float:none;margin-right:5px;width:16px;
height:16px;
}
ul.cssMenu ul img {width:16px;
height:16px;
}
ul.cssMenu img.over{display:none}
ul.cssMenu li.dis a:hover img.over{display:none !important}
ul.cssMenu li.dis a:hover img.def {display:inline !important}
ul.cssMenu li:hover > a img.def {display:none}
ul.cssMenu li:hover > a img.over {display:inline}
ul.cssMenu a:hover img.over,ul.cssMenu a:hover ul img.def,ul.cssMenu a:hover a:hover img.over{display:inline}
ul.cssMenu a:hover img.def,ul.cssMenu a:hover ul img.over,ul.cssMenu a:hover a:hover img.def{display:none}
ul.cssMenu a:hover ul{display:block}
ul.cssMenu span{
display:block;
background-image:url(./images/arrv_blue_2.gif);
background-position:right center;
background-repeat: no-repeat;
padding-right:8px;}
ul.cssMenu li:hover>a>span{ background-image:url(./images/arrv_white_2.gif);
}
ul.cssMenu a:hover span{ _background-image:url(./images/arrv_white_2.gif)}
ul.cssMenu ul span,ul.cssMenu a:hover table span{background-image:url(./images/arr_blue_2.gif)}
ul.cssMenu ul li:hover > a span{ background-image:url(./images/arr_white_2.gif);}
ul.cssMenu table a:hover span{background-image:url(./images/arr_white_2.gif)}
ul.cssMenu li a.cssMenui0{
font:n;
}
ul.cssMenu li a.cssMenui0:hover{
font:o;
}
</style>
<ul class="cssMenu cssMenum">
<li class=" cssMenui0"><a class=" cssMenui0" href="../index.html">Home</a></li>
<li class=" cssMenui0"><a class=" cssMenui0" href="../products/products.html"><span>Products & Services</span><![if gt IE 6]></a><![endif]><!--[if lte IE 6]><table><tr><td><![endif]-->
<ul class=" cssMenum">
<li class=" cssMenui"><a class=" cssMenui" href="../products/gps.html">GPS & Navigation Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../products/radio.html">Radio and Radar Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../products/signal.html">Signal Processing & Analyzers</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../products/antenna.html">E.M. Sensors & Antenna Types</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../products/space.html">Space Weather Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../products/instru.html">Instrumentation</a></li>
</ul>
<!--[if lte IE 6]></td></tr></table></a><![endif]--></li>
<li class=" cssMenui0"><a class=" cssMenui0" href="research.html"><span>Research & Development</span><![if gt IE 6]></a><![endif]><!--[if lte IE 6]><table><tr><td><![endif]-->
<ul class=" cssMenum">
<li class=" cssMenui"><a class=" cssMenui" href="navigation.html">Advanced Navigation Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="radio.html">Radio & Radar Engineering</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="em.html">Electromagnetics</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="signal.html">Signal & Image Processing</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="surv.html">Surveillance</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="physics.html">Space Weather & Physics</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="comp.html">Computer Systems & Software</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="ee.html">Electrical Engineering</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="science.html">Microwave/Material Science</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="instru.html">Instrumentation</a></li>
</ul>
<!--[if lte IE 6]></td></tr></table></a><![endif]--></li>
<li class=" cssMenui0"><a class=" cssMenui0" href="../publications/public.html"><span>Publications</span><![if gt IE 6]></a><![endif]><!--[if lte IE 6]><table><tr><td><![endif]-->
<ul class=" cssMenum">
<li class=" cssMenui"><a class=" cssMenui" href="../publications/journals.html">Journals</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../publications/conf.html">Conference Proceedings</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../publications/reports.html">Reports & Patents</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../publications/press.html">Press Releases</a></li>
</ul>
<!--[if lte IE 6]></td></tr></table></a><![endif]--></li>
<li class=" cssMenui0"><a class=" cssMenui0" href="../profile/pro.html"><span>About Us</span><![if gt IE 6]></a><![endif]><!--[if lte IE 6]><table><tr><td><![endif]-->
<ul class=" cssMenum">
<li class=" cssMenui"><a class=" cssMenui" href="../profile/pro.html">Profile</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../profile/bckgd.html">Background</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../profile/mission.html">Mission</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../profile/capabilities.html">Capabilities</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../profile/personnel.html">Personnel</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../profile/accom.html">Accomplishments</a></li>
<!--<li class=" cssMenui"><a class=" cssMenui" href="../profile/career.html">Careers</a></li>-->
<li class=" cssMenui"><a class=" cssMenui" href="../profile/contact.html">Contact Us</a></li>
</ul>
<!--[if lte IE 6]></td></tr></table></a><![endif]--></li>
<li class=" cssMenui0"><a class=" cssMenui0" href="../products/brochures.html">Brochures</a></li>
</ul>
<br> </div>
<div id="bg">
</div>
<div id="main">
<div id="leftcolumn">
<div id="logo">
<h1>Electromagnetics</h1>
<h2>Plasma Antenna</h2>
<p>
CRS�s span of expertise covering basic science to practical engineering allowed us to develop innovative antennas using �plasma� as the radiating element. Suitable columns of plasma are being used for both transmitting and receiving antennas covering frequencies up to S-band.
<br><br>
Use of suitable columns of plasma as the antenna offers several advantages in terms of:</p><br>
<div class="blockquote">
<div class="box">
<ul>
<li>Reconfiguration. It allows broader frequency range of operation and performance using the same volume space.</li>
<li>Improved performance. It works through larger bandwidth, tunability, and minimized cross-coupling</li>
<li>Stealthiness. It can be turned on and off, and tuned, very fast.</li>
</ul>
</div></div>
<br><p>
We have demonstrated that the plasma column antenna can have similar characteristics to metallic antennas.
<br><br>
Numerical simulation of the plasma antenna has been performed using an FDTD code developed by CRS.
<br><br>
Stealthy and reconfigurable antennas using plasma column have been developed.</p>
<h3>Numerical Simulation of Plasma</h3>
<div class="blockquote">
<div class="box">
<ul>
<li>A computer code has been implemented for the analysis of plasma antennas.</li>
<li>The code is capable of obtaining a wide frequency response using the FFT.</li>
</ul>
</div></div><br><center><img src="images/Plasma04B.gif" width="425" alt="business" /><br><br><img src="images/Plasma05B.gif" width="425" alt="business" /><br>
<br><p>The research is on-going.</p>
</div></div>
<div id="rightcolumn">
<div class="blockquote">
<div class="box"><h2>R&D</h2>
<ul>
<li> <a href="navigation.html">Advanced Navigation Systems</a></li>
<li> <a href="radio.html">Radio & Radar Engineering</a></li>
<li> <a href="em.html"><b>Electromagnetics</b></a></li>
<li> <a href="signal.html">Signal & Image Processing</a></li>
<li> <a href="surv.html">Surveillance</a></li>
<li> <a href="physics.html">Space Weather & Physics</a></li>
<li> <a href="comp.html">Computer Systems & Software</a></li>
<li> <a href="ee.html">Electrical Engineering</a></li>
<li> <a href="science.html">Microwave/Material Science</a></li>
<li> <a href="instru.html">Instrumentation</a></li>
</ul>
</div></div>
<h3>Available Products</h3>
<div class="blockquote">
<div class="box"><ul>
<li> <a href="emantenna.html" >Antenna and Electromagnetic Modeling Capabilities</a></li>
<li> <a href="emnec.html" >Modified NEC</a></li>
<li> <a href="emmapping.html" >Detection and Mapping of Underground Structures</a></li>
<li> <a href="emmodeling.html" >Electromagnetic Modeling for Underground Objects</a></li>
<li> <b>Plasma Antenna</b></li>
<li> <a href="emsw.html" >EM Modeling S/W Development</a>
</li>
</ul>
</div></div><br><center><img src="images/Plasma01S.gif" alt="business" /><br><i>Experimental set-up</i>
<br><img src="images/Plasma02S.gif" alt="business" /><br><i>Copper antenna</i><br><img src="images/Plasma03S.gif" alt="business" /><br><i>Plasma antenna</i><br></center><br>
</div>
<div id="footer"><p>Copyright © 2010 | <a href="../profile/mission.html">mission</a> | <a href="../profile/contact.html">contact us</a> | <!--<a href="../profile/careers.html">careers</a> | | |--> <a href="../sitemap.html">site map</a> | <a href="../search.html">search</a></p></div>
</div>
</body>
</html>