Design for electrical performance of wideband multilayer LTCC microstrip-to-stripline transition

A high impedance compensation technique is proposed to improve the wideband performance of the microstrip-to-stripline transition for multilayer LTCC substrate. A section of high impedance transmission line, which induces additional inductance, is added between the transition and 50 /spl Omega/ transmission line to compensate the capacitance of the transition. In the paper, various lengths and widths of the high impedance transmission line are simulated by HFSS and compared to optimize the electrical performance which achieves a return loss better than 17 dB over a band from DC to 70 GHz.