A Low-Loss Fully Board-Integrated Low-Pass Filter Using Suspended Integrated Strip-Line Technology

This paper presents a low-loss fully board-integrated low-pass filter (LPF) using suspended integrated strip-line (SISL) technology. A multilayer board stack-up, with internally buried hollow cavities, is used to create the suspended strip-line. By transitioning from the top copper ground-backed coplanar waveguide trace to an internal strip-line and vice versa, a more traditional industry-standard...