-----Original Message-----
From: Jon Ogden <na9d@speakeasy.net>
To: Steve Thompson <g8gsq@qsl.net>; amps@contesting.com
<amps@contesting.com>
To: <amps@contesting.com>
Date: 26 May 2001 00:31
Subject: Re: [AMPS] Conjugate Matching and Efficiency
>
>on 5/25/01 8:47 AM, Steve Thompson at g8gsq@qsl.net wrote:
>
>> For power to be reflected, doesn't the source have to be a transmission
>> line? A series C can reduce the power delivered to a load just by adding
>> reactance and increasing the overall impedance thus reducing the current.
>
>What do you mean "doesn't the source have to be a transmission line?"
Nothing personal here, Jon, but I can't think of any other way to put it. In
my mind, I can't see how you can have or measure forward and reflected power
without a transmission line somewhere. Doesn't reflected power only happen
when the termination on a transmission line doesn't equal Zo. I'm wide open
to correction here.
>
>A series C can indeed do what you say. However, a true series C does not
>dissipate energy but stores it.
Indeed. The point I intended to make was that there are situations and
impedances where simple impedance calculations are intuitively more useful
than s parameters, but it didn't come over as clearly as I intended.
Steve
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|