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james wrote:
Power is power. Phase is not a problem. Take the mafnitude of the transmitted power and teh magnitude of the reflected power. The results are phaseless. The magnitudes add linearly. Strangely enough, the results are not phaseless. The equation for reflected power at an impedance discontinuity is: Pref = P3 + P4 - SQRT(P3*P4)cos(theta) Where theta is the phase angle between V3 and V4, the associated reflected interferring voltages. Reference "Optics", by Hecht, Chapter 9 - Interference The last term in the equation above is known as the "interference" term. Unless you take the interference term into account, you don't have a ghost of a chance of ascertaining where the power goes. -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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