Dave Shrader wrote:

Henry Kolesnik wrote:
I know that a shorted 1/4 wave stub exhibits a very high impedance. But
for the 2nd harmonic it's a 1/2 wave stub and exhibits a very low
impedance
or a short. There are claims that this can be used to filter the even
harmonics. Shorts can't diisipate power and must reflect, so how does a
stub work?

It works exactly as you stated: "It reflects the second and all even
harmonic energy back to the source."

Yes, but only after making a round trip to the short or open at
the bottom end of the stub. V/I ratios don't cause reflections.
Only physical impedance discontinuities cause reflections.
--
73, Cecil http://www.qsl.net/w5dxp





-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----