I'm designing an RF multilayer board that is to work over 10-200MHz.
For the transmission line I'm using grounded co-planar waveguide.
Material is 10 thou Rogers 4350B, with a 50ohm track width of 0.46mm
and a track to top ground gap of 0.146mm.
This is working OK.
I now want to shield the board to prevent crosstalk, but I am
restricted to very little height.
My plan is to get a flat plate of say 1mm material half mm deep etched
with pockets that follow the RF lines and is grounded all elsewhere.
My worry is, will the fairly close proximity (but nearly 4 times the
track to gnd distance) of the metal plate above the transmission lines
cause problems, and/or will I have resonating cavities too?
I can make the cavities be 3 or 4 times wider that the gnd to gnd gap
around the lines if need be.
Re: grounded co-planar waveguide PCB design advice please ... I'm designing an RF multilayer board that is to work over 10-200MHz. ... For the transmission line I'm using grounded co-planar waveguide. ... and/or will I have resonating cavities too? ... I can make the cavities be 3 or 4 times wider that the gnd to gnd gap ... (sci.electronics.design)
grounded co-planar waveguide PCB design advice please ... I'm designing an RF multilayer board that is to work over 10-200MHz. ... For the transmission line I'm using grounded co-planar waveguide. ... and/or will I have resonating cavities too? ... I can make the cavities be 3 or 4 times wider that the gnd to gnd gap ... (sci.electronics.design)
Re: grounded co-planar waveguide PCB design advice please ... I'm designing an RF multilayer board that is to work over 10-200MHz. ... For the transmission line I'm using grounded co-planar waveguide. ...power/ground layer 3. ... (sci.electronics.design)
Re: grounded co-planar waveguide PCB design advice please ... I'm designing an RF multilayer board that is to work over 10-200MHz. ... For the transmission line I'm using grounded co-planar waveguide. ... And the mixed dielectrics (epoxy-glass and air) ... (sci.electronics.design)
Re: AT91RM9200 - problem with SD/MMC ... I have problem with transmission between ARM and MMC/SD on my board. ... I tested with 16MB SD from Panasonic and 256MB Kingston MMC.... -> GND... Add more pullups to the other pins?... (comp.arch.embedded)
