Optimal design of embedded passive components for RF circuits in LTCC

Low Temperature Co-fired Ceramic (LTCC) is the technology of choice for miniaturization of RF space subsystems, especially because of its ability to integrate passive components. This paper presents considerations for the optimal design of embedded passive components, viz. inductors and capacitors in multi-layer LTCC technology. Design choices visà-vis available geometries and layer of use are weighed through 3-D full wave electromagnetic simulations and the most suitable candidates are identified. The findings are corroborated through the design and fabrication of a UHF band 10% bandwidth 1:4 lumped element Wilkinson Power Divider, for space use, using Space Applications Centre’s in-house LTCC foundry.