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<title>Amplifier Performance</title>
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<h2>
<CENTER>
Central Development Laboratory</h2></center>

<center>
<h3>
Amplifier performance as of May 1999</h3></center>

<center><table BORDER CELLPADDING=9 WIDTH="600" >
<tr>
<td VALIGN=TOP COLSPAN="4">
<center>NRAO Low-Noise Amplifiers</center>
</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>Frequency Band (GHz)</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>Measured Amplifier Noise (K) at 20K</center>
</td>

<td VALIGN=TOP WIDTH="25%">
<center>Comments</center>
</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>0.290-0.395</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>2.0</center>
</td>

<td VALIGN=TOP WIDTH="25%">Balanced</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>0.385-0.520</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>2.0</center>
</td>

<td VALIGN=TOP WIDTH="25%">Balanced</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>0.510-0.690</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>2.0</center>
</td>

<td VALIGN=TOP WIDTH="25%">Balanced</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>0.680-0.920</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>3.0</center>
</td>

<td VALIGN=TOP WIDTH="25%">Balanced</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>0.910-1.230</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>3.0</center>
</td>

<td VALIGN=TOP WIDTH="25%">Balanced</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>1.15-1.73</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>3.0</center>
</td>

<td VALIGN=TOP WIDTH="25%">&nbsp;</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>1.73-2.60</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>4.5</center>
</td>

<td VALIGN=TOP WIDTH="25%">&nbsp;</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>2.60-3.95</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>5.2</center>
</td>

<td VALIGN=TOP WIDTH="25%">&nbsp;</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>3.95-5.85</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>9.3</center>
</td>

<td VALIGN=TOP WIDTH="25%">&nbsp;</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>8.0-10.0</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>10</center>
</td>

<td VALIGN=TOP WIDTH="25%">&nbsp;</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>12.0-18.0</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>12</center>
</td>

<td VALIGN=TOP WIDTH="25%">&nbsp;</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>18.0-26.5</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>10</center>
</td>

<td VALIGN=TOP WIDTH="25%">InP</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>26.5-40</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>14</center>
</td>

<td VALIGN=TOP WIDTH="25%">InP</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>40-50</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>17</center>
</td>

<td VALIGN=TOP WIDTH="25%">InP&nbsp;</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>53-69</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>33</center>
</td>

<td VALIGN=TOP WIDTH="25%">InP</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>65-90</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>45</center>
</td>

<td VALIGN=TOP WIDTH="25%">InP</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="25%">
<center>75-110</center>
</td>

<td VALIGN=TOP WIDTH="31%">
<center>60</center>
</td>

<td VALIGN=TOP WIDTH="25%">InP</td>
</tr>
</table></center>

<br>&nbsp;
<p>Notes:
<p>&nbsp;&nbsp;&nbsp; 1.&nbsp; Balanced amplifiers typically have input
and output return loss 20 dB or better.
<br>&nbsp;&nbsp;&nbsp; 2.&nbsp; InP denotes indium phosphide devices are
used rather than gallium arsenide.

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<em>Modified on Friday, 14-Jun-2002 12:07:22 EDT
</em>
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