Hairpin bandpass filter on Liquid Crystal Polymer substrate using inkjet printing technology

Inkjet-printing technology is utilized to fabricate a bandpass filter on a Liquid Crystal Polymer (LCP) substrates. Silver nanoparticle colloidal solution is used as the printing ink. The conductivity and thickness of silver film are 1~2×10
⁷
Siemens/m and 3.6 μm, respectively. The hairpin bandpass filter has been developed using inkjet printing technology. Bending effect causes frequency shift and insertion loss reduction due to material deformation while bending the LCP substrate.