High Q, miniaturized LCP-based passive components, and filter design for SoP applications

In this paper, for the first time, a library of completely embedded multi-layer capacitors and inductors designed in a custom adhessiveless multi-layer liquid crystal polymers (M-LCP) process is presented. High Q-factor spiral inductors (Q of 150 @ 8 GHz), and vertical interdigitized (VID) capacitors are demonstrated. As a proof of concept, two highpass filters are designed using the presented library. A size reduction of around 80% is achieved as compared to planar implementations, which highlights the miniaturization capabilities of the M-LCP technology. The miniaturized filter has an insertion loss of 0.2 dBs @ 3GHz.