ÿþ<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <html> <head> <title>Institute for ElectroMagnetic Research / Our Products / Electron Beam-Driven Pulsed Microwave Generators </title> <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252"> <meta name= "Description" content="Powerful microwave oscillators"> <meta name="Keywords" content="IEMR - Microwave Oscillators, MILO, MCG"> <link rel="stylesheet" href="style/institute.css" type="text/css"> </head> <body> <table width="90%"> <tr><td> <h3><a href="home_page.htm" >Home Page</a> > <a href="our_prod.htm" >Our Products</a> > Electron Beam-Driven Pulsed Microwave Generators</h3> <hr> <p>IEMR, Ltd. has developed, manufactured and pilot-tested several options of high-power pulsed microwave generators driven by high-current relativistic electron beams. The frequency range in which our proprietary generators radiate is within the scope of 1.4-10 GHz, the radiated pulsed power output being 300-900 MW. Its specific value depends on the type of the generator and its emission frequency. </p> <p>The radiated pulse width of our proprietary devices is within the limits of 30-100 ns, depending on the type and applied purpose of the generator.</p> <p>Some of our generators are operable both in single pulse mode and in the mode of emission of pulse bursts.</p> <h3 align="center">Pulsed Generators with Magnetic Insulation</h3> <p>The outstanding feature of our proprietary generators with magnetic insulation (GMI) is their low input resistance which allows to employ magnetocumulative generators (MCG) as their power sources. </p> <p>It is exactly this circumstance that allows to regard GMIs powered by MCGs, as very promising devices for a whole lot of applications despite their relatively low efficiencies which is attributable to the fact that around ¾ of the entire energy of the MCGs go to creation of the magnetic insulation fields. </p> <p>Fig. 1 shows photographs of one of the types of our proprietary GMIs. </p> <table border="0" align="center" width="80%"> <tr align="center"> <td>&nbsp;</td> <td><a href="./Figures/ebpm_gen_01.jpg"><img src="./Figures/sebpm_gen_01.jpg" width="300" height="198" border="0"/></a></td> <td>&nbsp;</td></tr> <tr><td>&nbsp;</td><td align="center">Fig. 1. Photograph of GMI designed to operate at 2 GHz, as powered by MCG. </td><td>&nbsp;</td></tr> </table> <table border="0" align="center" width="80%"> <tr align="center"> <td>&nbsp;</td> <td><a href="./Figures/ebpm_gen_02.jpg"><img src="./Figures/sebpm_gen_02.jpg" width="300" height="221" border="0"/></a></td> <td>&nbsp;</td></tr> <tr><td>&nbsp;</td><td align="center">Fig. 2. General view of generator with magnetic insulation at lab stand. </td><td>&nbsp;</td></tr> </table> <p>Main parameters of this generator are given in Table 1</p> <h3 align="center">Table 1. Main Performances of MCG-powered GMI </h3> <table border="1" align="center"> <title>Table 1. Main Performances of MCG-powered GMI </title> <tr><td> &nbsp;No&nbsp; </td><td>&nbsp;Designation of characteristic&nbsp;</td><td>&nbsp; Value of characteristic&nbsp;</td></tr> <tr><td>&nbsp;1.&nbsp;</td><td> Generation frequency </td><td>&nbsp;2 GHz&nbsp;</td></tr> <tr><td>&nbsp;2.&nbsp;</td><td> Power per pulse </td><td> &nbsp;0.9-0.95 GW&nbsp;</td></tr> <tr><td>&nbsp;3.&nbsp;</td><td> Generation pulse width </td><td>&nbsp;65-70 ns&nbsp;</td></tr> <tr><td>&nbsp;4.&nbsp;</td><td> Directivity pattern breadth </td><td> &nbsp; &#177; 20<SUP>0</SUP> at the level of 3 dB&nbsp;</td></tr> <tr><td>&nbsp;5.&nbsp;</td><td>&nbsp;Mode of operation&nbsp;</td><td> &nbsp;Single pulses&nbsp; </td></tr> <tr><td>&nbsp;6.&nbsp; </td><td>&nbsp;Supply voltage&nbsp;</td><td>&nbsp; 400-450 kV&nbsp;</td></tr> <tr><td>&nbsp;7.&nbsp; </td><td>&nbsp;Generator s length&nbsp;</td><td> &nbsp;Not more than 130 mm&nbsp;</td></tr> <tr><td>&nbsp;8.&nbsp; </td><td>&nbsp;Generator s diameter&nbsp;</td> <td>&nbsp;Not more than 35 cm&nbsp;</td></tr> <tr><td>&nbsp;9.&nbsp; </td><td>&nbsp;Generator s weight&nbsp; </td><td>&nbsp;Not more than 85 kg&nbsp;</td></tr> <tr><td>&nbsp;10. &nbsp;</td><td>&nbsp;Power source type&nbsp;</td><td>&nbsp;MCG, inductive storage &nbsp;</td></tr> </table> </td></tr></table> <table border="0" align="left" width="90%" > <tr><td> <hr> </td></tr> <tr><td align="center"> <a href="information.htm" target="mainFrame" >Information about IEMR</a> &nbsp; <a href="departments.htm" target="mainFrame" >Departments</a> &nbsp; <a href="our_prod.htm" target="mainFrame" > Products</a> &nbsp; <a href="our_res.htm" target="mainFrame" > Research Projects </a> </td></tr> <tr><td align="center"> <a href="http://www.emph.com.ua" target="_blank" >Electromagnetic Phenomena Journal</a> &nbsp; <a href="Address.htm" target="mainFrame" >Contact us </a> </td></tr> </table> </body> </html>