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RF_Highpower combiner at 1.3 GHz

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aks.rfms

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Dear all


i want to design a high power Rf combiner at the central frequency of 1.3 GHz
the power handling capacity should be 500 to 700 watts (about 58 dBm) in CW mode.

kindly suggest me the design type which may withstand that much power ?

which simulation software is good for this?

related calculations and references

thanking you

Arvind sharma
 

You can use CST Microwave studio as it is well equipped for all sort of tools. As for high power two things are important one is RF design and other is Thermal considerations and cooling and both of these things you can do in CST. You can also try to use Ansys that is also nice tool but it is little difficult to use.
You can start with the RF design and then can proceed with the Thermal issues
 
I don't think the planar combiners can resist to those power levels so wave-guide power combiner might needed..
 
BigBoss said:
I don't think the planar combiners can resist to those power levels so wave-guide power combiner might needed..
Click to expand...


Sir As i feel the size of the waveguide at this L-band is very large.
is there any other alternative?

- - - Updated - - -

BigBoss said:
I don't think the planar combiners can resist to those power levels so wave-guide power combiner might needed..
Click to expand...

sir .. can we proceed with suspended metal strip kind of structure.?
 

For 700 to 800 watt and that too in CW mode I will only suggest to go with waveguide options and that too classic waveguides as this is hell lot of power to handle. You can find claims about certain other technologies but they are still regarded as lab scale prototype and are not considered reliable.
So it is better if you do not have any other limitations go with classic waveguides for power handling and efficient coupling
 
nomigoraya said:
For 700 to 800 watt and that too in CW mode I will only suggest to go with waveguide options and that too classic waveguides as this is hell lot of power to handle. You can find claims about certain other technologies but they are still regarded as lab scale prototype and are not considered reliable.
So it is better if you do not have any other limitations go with classic waveguides for power handling and efficient coupling
Click to expand...

Ok sir

Wil try this
thanks
 

it is not impossible to do it in non-waveguide. For instance, stripline might work well. I would be concerned about the power handling of the isolation resistor, which depends on what sort of worst case load mismatches you can. I would use a substrate material that has enhanced thermal conduction capability, and mount the isolation resistor case onto a direct metal heat sink surface
 

If we write efficient and reliable then I really doubt that there is any else choice than waveguide keeping in view the power handling requirements. During my all working experience in accelerator field I have not seen any strip line power combiner with so much high power requirements. May be as prototype on lab scale but not as a reliable solution. Also if there are no limitations on selection of transmission line type it is always better to go with waveguide
 

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