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For this marchand balun schematics in ADS, how to instruct the ADS layout generator to use coil shape (for area saving in IC) ?

Besides, anyone have any experience with planar layout of marchand balun on PCB ?

balun schematics

balun schematics

generated balun layout not in coil shape

generated balun layout not in coil shape

balun layout in coil shape

balun layout in coil shape

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  • \$\begingroup\$ I think you'll need to draw the coil shape manually and then optimize the balun performance (manually) using co-simulation. \$\endgroup\$ – Andrés Martínez Mera May 30 at 10:05
  • \$\begingroup\$ @AndrésMartínezMera [edadocs.software.keysight.com/display/ads2009/… Co-simulation) ? \$\endgroup\$ – kevin May 30 at 10:40
  • \$\begingroup\$ As far as I know, there's no instruction to convert coupled lines into their lumped circuit equivalent in ADS, so you'll have to do it manually, draw the inductors in the layout window, and then run the EM simulation. Personally, I tend to use the co-simulation option (youtube.com/watch?v=BQUfZNanNFk) because I consider this speeds the design cycle (change things in the layout <=> simulate circuit). \$\endgroup\$ – Andrés Martínez Mera May 30 at 13:04
  • \$\begingroup\$ @AndrésMartínezMera Someone else told me to replace CLIN with 2 Symmetrical Coupled Microstrip Lines (MCP) and then use linecalc to get the correct length and width. What do you think about this idea ? \$\endgroup\$ – kevin May 31 at 7:35
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    \$\begingroup\$ @AndrésMartínezMera I just realized that MCP will only result in straight line layout. The balun working frequency is 60GHz. I do not have tapeout opportunity currently, I could only do it on PCB layout. Would 60GHz work for PCB layout \$\endgroup\$ – kevin998x Jun 1 at 1:05

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