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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: Thinking complete... posted by Dan Banquer on April 2, 2007 at 15:46:04:
Hi Dan,The reflected impedance is not quite ALL over the map. I presume the map in question is a Smith chart in which case it will be running around in a circle at the VSWR radius.
I don't think anyone claimed that the power resistor would absorb microwave energy, but I did speculate that it might provide a low impedance for the audio, or AC and that it's inductance would force higher frequency currents to flow more in the outer resistive layer which should stay resistive into the GHz region. As you pointed out, stray capacity in the resistor may limit it's ultimate attenuation.
As far as location goes, it probably doesn't matter as much as you'd suppose. To the traveling wave it's a loss, to the standing waves it varies, but except for the comb of frequencies where it's right at a current node it will help, especially since the reflected energy will pass through it over and over.
Microwaves are an issue for all of us nowadays, of course on the plus side it's convenient being able to hear our cell phones ring through the stereo... They may start radiated but usually end up getting picked up by the wires.
So, back to the issue at hand, I think we are looking for mechanisms that could account for the Bybee filters helping without invoking magic. Magic of course meaning things I don't understand...
Regards, Rick
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Follow Ups
- Re: Thinking complete... - rick_m 17:55:20 04/02/07 (2)
- Think Marketing! - Dan Banquer 04:30:06 04/03/07 (1)
- Re: Think Marketing! - rick_m 07:04:48 04/03/07 (0)
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