Re: Looking for thin, metal tape for shielding

[Arno Wagner <me@privacy.net>]

In comp.sys.ibm.pc.hardware.misc Michael Pender <mpender@hotmail.com> wrote:
> Arno Wagner <me@privacy.net> wrote in message
> news:bejt38$5svc1$2@ID-2964.news.dfncis.de...
>>
>> This has no transistor effect at all. If it had, every capacitor
>> would be a transistor.
> Perhaps every *unsealed* capacitor would act like a resistor.

Resistor for RF yes, transistor no. A transistor is an active 
component, while a resitor or a capatitor is not. 

>> I also have never heard of MOM stransistrs, only MOS.
> Okay, then think of as a a really large diode, where the oxidized metal
> surfaces form the semiconductor material.

Since when does oxydized metal have semiconductor-properties?
In fact in a MOS-FET, the metal oxyde froms the insulator, just like
the PN-junktion in a JFET.

>> The key to MOS transistors is a semi-conductor that has movable
>> electrons and can be made more or less conducting by applying an
>> external electric field.

[...]

> The references I used are proprietary.

> If you are seriously interested then I recommend:
> - search Google for references on "passive intermodulation" or "PIM"
> - pick up a copy of the conference report by the European Space Agency:
> Multipactor, RF and DC Corona and Passive Intermodulation in Space RF
> Hardware", 4-6 September 2000, ESTEC, Noordwijk, The Netherlands.

Aha, now I know what you are talking about! (Roughly, as this RF 
stuff is in part black magic in my eyes.) This is not about an 
active element, but rather a passive mixer/modulator/resonator-effect.
Yes that could certainly happen with isolated strips of conducting
material.

Arno
-- 
For email address: lastname AT tik DOT ee DOT ethz DOT ch
GnuPG: ID:1E25338F FP:0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
  "The more corrupt the state, the more numerous the laws" - Tacitus