[SI-LIST] Re: Height of the shield can
- From: steve weir <weirsi@xxxxxxxxxx>
- To: sunil bharadwaz <sunil_bharadwaz@xxxxxxxxx>
- Date: Sun, 31 May 2009 13:34:12 -0700
The can will exhibit resonant modes based on its dimensions in all three
axes. This will affect what leaks in each direction at any seams and/or
apertures. It will also potentially give you surprise undesirable
coupling between elements within the can. If you really don't want any
surprises you can: Design the can to be very small compared to your
wavelengths, ie less than a quarter wave on any diagonal, rely on Q
suppression techniques, and/or evaluate in a 3D tool like Ansoft, CST
etc. Scott McMorrow has 3D tools from multiple vendors and does this
stuff all day long.
Steve.
sunil bharadwaz wrote:
> Hi ,
> I'am trying to design a shield can for an RF Transceiver module @ 5.0 Ghz .
> I'am trying to figure out the impact of the height of the shield can
> on the overall performance...
>
> Is there any specific rule of thumb @ height in terms of wavelength.
> Meaning ,the impact due to the shield height of Lamda/4 , Lamda/2
> etc ....
>
> Appreciate any inputs on the above topic ....
>
> regards
> Sunil.b
>
>
>
>
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