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Ka-band power amplifier MMIC using Lange-based balance stru

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patriot

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I saw many PAs of this band using balanced structure to get more than 2 watts output power. I computed the lange in ADS and got the lange's parameters as following:
Width=5um;Space=7um,Length=720um
How to fabricate the interconnects between the lines? It is impossible to use air-bridge with these sizes.
 

Re: Ka-band power amplifier MMIC using Lange-based balance

patriot said:
I saw many PAs of this band using balanced structure to get more than 2 watts output power. I computed the lange in ADS and got the lange's parameters as following:
Width=5um;Space=7um,Length=720um
How to fabricate the interconnects between the lines? It is impossible to use air-bridge with these sizes.
Click to expand...

What are your substrate parameters? You might try a branchline hybrid instead if BW allows.
 

Re: Ka-band power amplifier MMIC using Lange-based balance

GaAs said:
patriot said:
I saw many PAs of this band using balanced structure to get more than 2 watts output power. I computed the lange in ADS and got the lange's parameters as following:
Width=5um;Space=7um,Length=720um
How to fabricate the interconnects between the lines? It is impossible to use air-bridge with these sizes.
Click to expand...

What are your substrate parameters? You might try a branchline hybrid instead if BW allows.
Click to expand...


The substrate is GaAs,If branchline,i cannot get the BW
Need i widen the size of width and space,just to meet the requirements of air-bridge process?
 

Re: Ka-band power amplifier MMIC using Lange-based balance

What design rule are you violating for AB? This shouldnt be a problem for most GaAs fab's from my experience...
 

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