Influence of different substrates' thickness on the performance of inkjet printed CPW inductors

In this paper, influence of different substrates' thickness on coplanar waveguide (CPW) inductors for high frequency applications is presented. The designed CPW inductors are two-port meanders with one turn and outer dimension 1.8 mm × 2.0 mm. CPW inductors were made in inkjet printing technology with nanoparticle ink which contain 20 wt% of silver. CPW inductors are fabricated on substrates with 25, 50, 75 and 125 μm thicknesses. The measured response characteristics are in excellent agreement with the predicted simulation response. The best values of inductance and Q-factor were obtained with 125 μm thickness of substrate (L=2.269 nH and Q≡5).