Hi Jeff
60dB, that's quite a spec! Is that open loop, or with cartesian
correction, or feed-forward?
Current technology to do that (in the backed-off 10's of watts level) is
rather complex.
Mark
-----Original Message-----
From: jeff millar [mailto:wa1hco@adelphia.net]
Sent: 15 August 2005 13:20
To: Mark Marsden
Cc: Amps@contesting.com
Subject: Re: [Amps] Ribbon Beam Amplifiers
I met with Chiping about a year ago to discuss this technology...It's
still very early in the game.
The key requirements for application to cellular networks include
* Greater than 13 dB peak to average ratio (100W avg, 2 KW peak
output)
* Intermod distortion products more than 60 dB down
If memory serves, the tubes and their RF cavity form an integral unit.
jeff, wa1hco
Mark Marsden wrote:
>
>An interesting press cutting appeared on the tea-point notice board
>here at work last week. It's about a new vacuum tube device called
>"Ribbon Beam Amplifier (RBA)" developed by MIT for 3G base station PAs,
>check out http://web.mit.edu/newsoffice/2005/wireless.html
>
>73 Mark G4AXX
>_______________________________________________
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