[eagle] 2M High Efficiency PA

Tom Clark, K3IO tom.k3io at gmail.com
Sat Jul 14 19:59:18 PDT 2007

In case you missed it, the following EAGLE item appears in today's AMSAT
NEWS SERVICE (ANS) bulletins:

> SB SAT @ AMSAT $ANS-196.04
> High Efficiency RF Linear Amplifier Design Proposed for Eagle
> AMSAT News Service Bulletin 196.04
> July 15, 2007
> BID: $ANS-196.04
> AMSAT members Allen Katz, K2UYH and Marc Franco, N2UO have
> designed a VHF, high-efficiency, class-E, RF power amplifier
> with a DC to RF efficiency of 86.8%.  Their innovative 
> design is based on silicon carbide (SiC) metal-semiconductor 
> field effect transistors, or MESFETs.
> The design was presented in a paper at the IEEE International 
> Microwave Symposium in Hawaii.  It is now available on-line:
> http://www.cree.com/products/wireless_docs.htm titled
> "Class-E Silicon Carbide VHF Power Amplifier" (June 5, 2007)
> The final amplifier efficiency was measured at around 86 to 88%
> with this number holding quite well at almost any drain voltage 
> or output power. This type of amplifier is under consideration
> for the envelope elimination and restoration linear amplifier
> planned for the AMSAT Eagle satellite.
> [ANS thanks Marc, N2UO for the above information]
> /EX
Marc has promised to have a presentation with more details on this work
for the October AGM in Pittsburgh.

(BTW -- Marc & Patty are expecting their first 2nd harmonic)

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