I have have found the manuafcturer of the Ohmega-Ply resistor material but they only supply it in 60 squre feet quantities.
Does anyone know of any smaller amounts available anywhere? Say, a couple feet of 100 Ohm per square?
Thank you
Hello Logbook,
It is probably they way the resistive card is used.
A strip of it is placed in the waveguide, secured at each end against one H wall and a pin or screw is used to bow the vane in to the path of the microwave RF, thus attenuating the signal.
I am looking for a supplier for resistive card used in a Waveguide Bow Vane attenuator. I am not sure even what the material is called! All I know is that the resistance is measured in Ohms per square...
Basically I am trying to come up with a simple design for a variable attenuator, so any...
1. Yes, the heatsink is on the outside of the waveguide.
2. Is natural convection cooled
3. Say about 60 degC
I was thinking of using a set of individual fins mounted in the same plane as a flange would be, about 100mm by 100mm by 2mm, spaced along the guide at regular intervals.
The finished...
I need some help in ways of calculating the number and size of fins required to disperse heat generated by a load element inside a piece of wave guide.
The load element is silicon carbide absorbing 200W of power in copper or aluminium WR75 waveguide.
Any pointers would be very much appreciated
