|
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/products/ |
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 | Products & Services | GPS & Navigation Products | Navigational System Design & Development Products | RF Front Ends</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.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="gps.html">GPS & Navigation Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="radio.html">Radio and Radar Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="signal.html">Signal Processing & Analyzers</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="antenna.html">E.M. Sensors & Antenna Types</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="space.html">Space Weather Systems</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="../research/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="../research/navigation.html">Advanced Navigation Systems</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/radio.html">Radio & Radar Engineering</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/em.html">Electromagnetics</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/signal.html">Signal & Image Processing</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/surv.html">Surveillance</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/physics.html">Space Weather & Physics</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/comp.html">Computer Systems & Software</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/ee.html">Electrical Engineering</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/science.html">Microwave/Material Science</a></li>
<li class=" cssMenui"><a class=" cssMenui" href="../research/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="brochures.html">Brochures</a></li>
</ul>
<br> </div>
<div id="bg">
</div>
<div id="main">
<div id="leftcolumn">
<div id="logo">
<h1>GPS and Navigation Products</h1>
<h2>Navigational System Design & Development Products: <br>RF Front Ends</h2>
<p>RF front ends downconvert GPS signals to IF and then digitize them at user-specified rates. Digitized data go either to PC RAM or to hard disk. The software receiver uses data from the front end. The RF front end includes a downconverter board and data-logging board. The data-logging board mounts into the PCI slot of the host platform (PC). Users can mount the downconverter board as a daughter card of the data-logging board or keep it outside the PC, using separate enclosure with an independent power supply.</p>
<h3>ITEM 1A: <b><a href="../pdf/Single Frequency Front End.pdf">Single-Frequency GPS Front End</a></b></h3>
<div class="blockquote">
<div class="box">GPS FRONT END (GPF-CA-001-01)<br>Downconverter: DC-1-002-01<br>Data-Logger: DL-1-002-01
<br><br>
GPS FRONT END WITH AGC (GPF-CA-004-04)<br>Downconverter: DC-1-004-01<br>Data-Logger: DL-1-002-01
<br><br>
GPS AGC FRONT END (GPF-CA-007-04)<br>Downconverter: DC-1-007-94<br>Data-Logger: DL-1-002-01
</div></div>
<br><b><i>SINGLE FREQUENCY DOWNCONVERTERS </b></i>
<br>
<div id="content">
<table cellspacing="0" cellpadding="0">
<tr>
<th scope="col"> </th>
<th scope="col"><i>DC-1-002-01</th>
<th scope="col"><i>DC-1-004-01</th>
<th scope="col"><i>DC-1-007-04</th>
</tr>
<tr>
<th scope="row">Input Frequency</th>
<td>1,575.42 MHz</td>
<td>1,575.42 MHz</td>
<td>1,575.42 MHz</td>
</tr>
<tr>
<th scope="row">Bandwidth</th>
<td>4 MHz</td>
<td>4 MHz</td>
<td>2 MHz</td>
</tr>
<tr>
<th scope="row">Noise Figure</th>
<td>4.5 dB</td>
<td>4.5 dB</td>
<td>4.0 dB</td>
</tr>
<tr>
<th scope="row">Gain</th>
<td>70 dB</td>
<td>90 dB</td>
<td>80 dB</td>
</tr>
<tr>
<th scope="row">Gain Range</th>
<td>0-30 dB (2 dB steps)</td>
<td>AGC</td>
<td>N/A</td>
</tr>
<tr>
<th scope="row">Final IF</th>
<td>3.99 MHz</td>
<td>3.99 MHz</td>
<td>2.556 MHz</td>
</tr>
<tr>
<th scope="row">Antenna</th>
<td>Single L1, Integrated 26 dB LNA</td>
<td>Single L1, Intergated 26 dB LNA</td>
<td>Same</td>
</tr>
<tr>
<th scope="row">Antenna Power</th>
<td>12V dc</td>
<td>12V dc</td>
<td>12V dc</td>
</tr>
<tr>
<th scope="row">Housing</th>
<td>6x4x0.9"; SMA Connectors</td>
<td>6x4x0.9"; SMA Connectors</td>
<td>4x2x0.9"</td>
</tr>
<tr>
<th scope="row">Power Consumption</th>
<td>2.6 w</td>
<td>2.6 w</td>
<td>275 mw</td>
</tr>
<tr>
<th scope="row">Ext. Clock Input</th>
<td>10 MHz</td>
<td>10 MHz</td>
<td>N/A</td>
</tr>
</table></div>
<br><p><b><i>DATA LOGGER: DL-1-002-01</b></i><br>Sample rate: 4 to 10 MHz, 2 bits (up to 12 bits optional)<br>Interface: PCI bus
<br><br>
<h3>ITEM 1B: <b><a href="../pdf/Dual Frequency Front End.pdf">Dual-Frequency GPS Front End</a></b></h3>
<div class="blockquote">
<div class="box">GPS FRONT END (GPF-DF-002-01)<br>Downconverter: DC-2-001-01<br>Data-Logger: DL-2-001-01/DL-2-007-04
<br><br>
GPS FRONT END WITH AGC (GPF-DF-007-04)<br>Downconverter: DC-2-007-04<br>Data-Logger: DL-2-001-01/DL-2-007-04
<br><br> <ul><li>GPS FRONT ENDS with M-code downconverters: DC-2-001M-01/DC-2-007-04</li></ul></div></div><br>
<br><b><i>DUAL FREQUENCY DOWNCONVERTERS </b></i>
<br>
<div id="content">
<table cellspacing="0" cellpadding="0">
<tr>
<th scope="col"> </th>
<th scope="col"><i>DC-2-002-01</th>
<th scope="col"><i>DC-2-007-04</th>
</tr>
<tr>
<th scope="row">Input Frequency</th>
<td>L1 & L2 1575.42 MHz 1227.6 MHz</td>
<td>Same</td>
</tr>
<tr>
<th scope="row">Bandwidth</th>
<td>18 MHz</td>
<td>18 MHz</td>
</tr>
<tr>
<th scope="row">Noise Figure</th>
<td>4.5 dB</td>
<td>4.5 dB</td>
</tr>
<tr>
<th scope="row">Gain</th>
<td>70 dB</td>
<td>90 dB</td>
</tr>
<tr>
<th scope="row">Gain Range</th>
<td>0-30 dB (2 dB steps)</td>
<td>AGC</td>
</tr>
<tr>
<th scope="row">Final IF</th>
<td>13.99 MHz/13.60 MHz</td>
<td>13.99 MHz/13.60 MHz</td>
</tr>
<tr>
<th scope="row">Antenna</th>
<td>Single L1/L2, Integrated 26 dB LNA</td>
<td>Same</td>
</tr>
<tr>
<th scope="row">Antenna Power</th>
<td>12V dc</td>
<td>12V dc</td>
</tr>
<tr>
<th scope="row">Housing</th>
<td>4x6x0.9"</td>
<td>4x6x0.9"</td>
</tr>
<tr>
<th scope="row">Power Consumption</th>
<td>7 w</td>
<td>8 w</td>
</tr>
<tr>
<th scope="row">Ext. Clock Input</th>
<td>10 MHz</td>
<td>10 MHz</td>
</tr>
</table></div>
<br><br><div class="blockquote">
<div class="box"><ul><li>DC-2-001M-01 and DC-2-007M-04 have bandwidths of 24 MHz</li></ul></div></div><br>
<h3>DATA-LOGGERS:</h3>
<div class="blockquote">
<div class="box">DL-2-001-01<br>Sampling rate 60 MSPS @ 2 bits<br>DL-2-007-04<br>Sampling rate 77.67 HSPS @ variable bits (2, 4, 8, 14)
<br><br> <ol><li>Multiple-frequency units available (similar to dual-frequency but also includes the third (L5 frequency).</li>
<li>User can easily alter all frequencies to accommodate Glonass, Galileo, and/or other frequencies.</li>
<li>Various Antenna configurations (including LNA) available.</li>
<li>Correlators (FPGA) and DSP-processors available as add-ons to front-ends.</li>
<li>RAM-based and hard disk-based storage devices also available for front-ends.</li>
</ol></div></div>
<h3>Multi-Antenna GPS Front End (4 RF inputs to 4 IF outputs)</h3>
<div class="blockquote">
<div class="box">GPS MULTI-FRONT END (GPF-MA-003-01)<br>Downconverter: DC-003-01<br>Data-Logger: DL-003-01
</div></div><br>
<h3>Specifications</h3>
<p>Multiple antennas and RF front ends with a common local oscillator (LO) allow space-time processing. All downconverters are mounted in a single card. Another PCI card with multiple inputs logs data.</p>
<h3>User-specified custom products</h3>
<p>150 MHz/400 MHz front ends: Specialized adaptation for satellite applications at 150 and 400 MHz and/or other frequencies. All downconverters use programmable LOs, easing this adaptation and frequency modification.</p>
<h3>Antennas and LNAs</h3>
<p>We have developed GPS antennas for advanced applications, including novel L1 and L2 antennas with performacne superior to currently available models. These include one L1, L2, L5 antenna (<a href="../publications/reports.html">US Patent 6,940,457</a>) suitable for future signals (including M-code and Galileo), and several multi-element antennas (CRPA) with 5 and 7 elements of single and dual frequencies.
<br><br>
These antennas use novel fractal elements and Electronic Bond Gap (EBG) materials to control surface waves. Some have a unique (<a href="../publications/reports.html">US Patent 6,940,457</a>) vertical choke-ring structure. Like the antennas, these choke rings are smaller yet more sensitve than standard.
<br><br>
Their areas of improvement include front-to-back ratio, polarizations, gained flatness, bandwidth, phase center stability, overall gain, and smoothness of gain variation with elevation.
<br><br>
The antennas have built-in LNAs. Separate LNA modules also available.</p><br>
<div class="blockquote">
<div class="box"><ol><li><a href="gpsantenna.html">Antenna Unit (L1, L2)</a></li>
<li><a href="gpsantenna.html">Antenna Unit (L1, L2, L5)</a></li>
</ol></div></div>
</div></div>
</div></div>
<div id="rightcolumn">
<div class="blockquote">
<div class="box">
<h2>GPS and Navigation Products</h2>
<ul>
<li> <a href="gpssystem.html"><b>Navigational System Design & Development Products</b></a></li>
<li> <a href="gpssim.html">Navigational Signal Simulators</a></li>
<li> <a href="gpsrx.html">Multi-Frequency GPS and GNSS Receivers</a></li>
<li> <a href="gpspseudolite.html">Pseudolites</a></li>
<li> <a href="gpsantenna.html">GPS/GNSS Antennas</a></li>
<li> <a href="gpsnavwar.html">NAVWAR</a></li>
</ul>
</div></div><br><div class="blockquote">
<div class="box">
<h3>Products covered in this section:</h3>
<ul>
<li> <b>RF Front Ends</b></li>
<li> <a href="gpssystemsoftrx.html">Software Receiver</a></li>
<li> <a href="gpssystemstor.html">Hard Disk-Based Storage System</a></li>
<li> <a href="gpssystemdsp.html">Modular Correlators and DSP Processors</a></li>
<li> <a href="gpssystemsigsim.html">GPS/GNSS Signal Simulator Software</a></li>
<li> <a href="gpssystemhybrid.html">Hybrid Simulator</a> </li>
<li> <a href="gpssystemrealtime.html">Complete real-time navigational development</a> </li>
<li> <a href="gpssystemapp.html">System Application</a> </li>
<li> <a href="gpssim.html">Real-Time GPS/GNSS Simulators</a></li> </ul>
</div></div><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><div class="blockquote">
<div class="box"><center><b><a href="../pdf/Single Frequency Front End.pdf">Single-Frequency GPS Front End</a></b> (brochure)<br><br><b><a href="../pdf/Dual Frequency Front End.pdf">Dual-Frequency GPS Front End</a></b> (brochure)</center>
</div></div>
</div>
</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>