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Old 21st Nov 2022, 8:32 pm   #29
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Default Re: Common Emitter Amplifier Design S Parameters

Don't have the MRF1513 datasheet in my head, but if those designators mean the ones I think, they are a lossy dampener to prevent the thing oscillating almost however you use it. They also serve to modify the s-data so it isn't glaringly obvious how unstable the raw device is.

Be aware that k factors assume you have a good wideband Z0 attached to the input matching network. Antennae are only good narrowband.

David
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