Menu

Discussion Forum

New Discussion
Filter

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

attenuation

Posted Mar 23, 2011, 10:15 a.m. EDT 3 Replies

M R
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi

How could I define attenuation(dB/meter) in wave propagation in PDE module of comsol ?

cheers
3 Replies Last Post Mar 25, 2011, 7:03 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 24, 2011, 3:04 a.m. EDT
Hi

what do you mean ?

to plot

20*log10(myVar)

or to find the expression of myVar ?

--
Good luck
Ivar
Hi what do you mean ? to plot 20*log10(myVar) or to find the expression of myVar ? -- Good luck Ivar
M R
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 25, 2011, 4:30 a.m. EDT
Hi,

Thank you for your reply? I mean how could I enter attenuation in system? what is myvar and how could I obtain it?

cheers,
Hi, Thank you for your reply? I mean how could I enter attenuation in system? what is myvar and how could I obtain it? cheers,
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago Mar 25, 2011, 7:03 a.m. EDT
Hi

"myVar" is just a quick name I use to represent any "user" variable. In your case you must then define
myVar = attenuation.

For me attenuation is model dependent, ie. could be the ratio of the integral of the input field to the output field, or the ratio of the values at two locations ...

--
Good luck
Ivar
Hi "myVar" is just a quick name I use to represent any "user" variable. In your case you must then define myVar = attenuation. For me attenuation is model dependent, ie. could be the ratio of the integral of the input field to the output field, or the ratio of the values at two locations ... -- Good luck Ivar

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content