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Should I worry about stability due to harmonics in Class E PA design?

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torbai

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Hello all

I'm designing a Class E PA at 13.56MHz. I find that Freescale MRFE6VS25N, which can work from 1.8MHz to 2GHz, is very suitable for my design. http://cache.freescale.com/files/rf_if/doc/data_sheet/MRFE6VS25N.pdf

However, the wide working bandwidth makes a new issue: Will the amplifier be oscillating due to the harmonics which are still in the working bandwidth of the MOSFET?

There is a reference Class C (or Class B) design, whose schematic and layout are both very simple, working at HF frequencies(1.8-30MHz). It appears that the reference design doesn't worry about the harmonics. But should I worry about that in Class E?
 

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