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<p class=MsoNormal>Dear all,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US>I found the following (commercial) publication
on very high efficiency RF power amplifiers:<o:p></o:p></span></p>
<p class=MsoNormal><a
href="http://www.mathworks.nl/company/newsletters/digest/2010/july/nujira-amplifier-performance.html?s_v1=13445411_1-6XCKGU"><span
lang=EN-US>http://www.mathworks.nl/company/newsletters/digest/2010/july/nujira-amplifier-performance.html?s_v1=13445411_1-6XCKGU</span></a><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>It is of course a success story describing
the benefit of their own product, but the message I get from it: EER as we meant
to achieve in Thor can be done. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Also the article mentions the use of
predistortion to create a very linear amplifier. I heard that before from an
English consultant (For my QRL I participate in European standardization work).
He said that mobile phone network operators had great success with
predistortion to get rid of IMD products on combined installations. So I see the
remark in this document as a confirmation that that has become feasible with “average”
means. I havenīt seen any amateur publications yet on the use of non-linear or not-so-linear
amplifiers and predistortion. With the processing power we have in HPSDR this
may come within reach.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>By the way: as a MatLab user I’m very
interested in using Simulink to simulate such applications. Makes it possible
to replace the MatLab software blocks bit-by-bit by real-life hardware.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Justed wanted to share this information
with you.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Kindest regards, 73,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Ben, PA5BW<o:p></o:p></span></p>
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