Miniaturized stub-loaded resonator bandpass filter fabricated using multilayer inkjet printing technology

摘要

This paper presents a stub-loaded resonator bandpass filter fabricated on a liquid crystal polymer by using a multilayer inkjet printing process. A layer-by-layer deposition mechanism was achieved in the inkjet printing process by using metallic nanoparticle-based and polymer-based inks. Two dielectric layer thicknesses were determined in appropriate areas for deriving capacitive loading that enabled reducing the chip area by 89% and achieving a two-layer source-load coupling in the wide stopband of the proposed bandpass filter. A miniaturized bandpass filter was created with a minimal S21 of -3.16 at 13.7 GHz. The results demonstrated that the multilayer inkjet printing process provides high design freedom, a small size, low cost, and feasibility for the emerging field of wireless electronics.