| View previous topic :: View next topic |
| Author |
Message |
Efthimios
Guest
|
 Posted: Wed Oct 29, 2008 2:17 pm Post subject: Waveguides and time variable DC fields |
 |
|
Does any of you know if the time variable DC EM field (like the one
coming out of single diode) propagates like a normal sinusoidal wave
within a waveguide?
Does the same applies about cut off frequencies? |
|
| |
|
 Back to top |
Salmon Egg
Guest
|
| Posted: Wed Oct 29, 2008 8:18 pm Post subject: Re: Waveguides and time variable DC fields |
|
|
In article
<e373e492-e768-4984-a3bf-9ed72e59cabf@y79g2000hsa.googlegroups.com>,
Efthimios <eangelopoulos@gmail.com> wrote:
[quote]Does any of you know if the time variable DC EM field (like the one
coming out of single diode) propagates like a normal sinusoidal wave
within a waveguide?
Does the same applies about cut off frequencies?
[/quote]
The TEM00 waveguide mode is merely that of a pair of conductors with the
same cross-sectional configuration as you go down its length. Such
guides, if that is what you wish to call them, include twin-lead and
coaxial cables such as used to connect TV antennas to the TV set. In
many ways it is just your day to day pair of wires. There is no cut-off
(minimum useable) frequency. Ig goes down to dc. There will be some
dispersion and loss change as you increase frequency. Higher order modes
are possible.
Bill
--
Private Profit; Public Poop! Avoid collateral windfall! |
|
| |
|
| Back to top |
|
