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Henry-cool
Joined: 21 Jul 2008
Posts: 27
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 28 Aug 2008 2:48 PA stability check(VSWR) |
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Dear all~!
Thanks in advance.
When I check PA stability, I just check k-factor.(K>1)
Is it enough to check k-factor for stability? or I should check others in addition.
Please let me know it.
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vfone
Joined: 10 Oct 2001
Posts: 1767
Helped: 232
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| 28 Aug 2008 12:50 Re: PA stability check(VSWR) |
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K-factor in general is good for small signal or very linear power amplifiers (Class A).
It is anyway a good starting point for your analysis, at least to see out of band instabilities.
For a power amplifier characterization you need a load-pull (source and load) vs stability.
Also a bias point vs linearity vs stability would help getting a good PA design.
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wireless man
Joined: 24 Feb 2008
Posts: 44
Helped: 1
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| 28 Aug 2008 13:58 PA stability check(VSWR) |
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| what the environment is ? ADS? OR Cadence? or others?
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John_li
Joined: 06 Aug 2005
Posts: 188
Helped: 5
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| 28 Aug 2008 23:11 PA stability check(VSWR) |
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Dear vfone,
Any document shared to us?Thank you.
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Henry-cool
Joined: 21 Jul 2008
Posts: 27
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| 29 Aug 2008 0:00 Re: PA stability check(VSWR) |
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Thank you for reply~!
I use cadence RF Spectre, and PA is class AB type.
I checked bias point, and linearity.
For large signal, should I check others except K-factor?
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flatulent
Joined: 19 Jul 2002
Posts: 4866
Helped: 292
Location: Middle Earth
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| 29 Aug 2008 0:27 Re: PA stability check(VSWR) |
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| Once you get the simulated amplifier to work, it is wise to try the load pulling on a real physical version of the amplifier.
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