Inkjet-printed interdigital coupled line filter on liquid crystal polymer substrate

Hsuan Ling Kao, Cheng Lin Cho, Li Chun Chang

Research output: Contribution to journalJournal Article peer-review

27 Scopus citations


This letter investigates inkjet-printed interdigital coupled line bandpass filters on liquid crystal polymer substrates. Silver nanoparticle colloidal solution was used as the printing ink. Various numbers of passes were used to print the samples to study the changes in conductivity and uniformity. Samples were then sintered in an oven to remove excess solvent and material impurities. The silver-film conductivity of the conductive ink was ${\sim}1\times 10^{7}~{\rm S}/{\rm m}. The interdigital coupled line bandpass filter was printed with an inkjet printing system. The study achieved a minimal insertion loss and maximal return loss of {-}{3.6} and {-}{\rm 24}~{\rm dB} at 25.7 GHz, respectively.

Original languageEnglish
Article number6646200
Pages (from-to)1584-1586
Number of pages3
JournalIEEE Electron Device Letters
Issue number12
StatePublished - 12 2013


  • Bandpass filter
  • inkjet printing
  • liquid crystal polymer (LCP)
  • silver


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