A Miniaturized Microfluidically Reconfigurable Coplanar Waveguide Bandpass Filter With Maximum Power Handling of 10 Watts Academic Article uri icon


  • 1963-2012 IEEE. In this paper, a microfluidically reconfigurable coplanar waveguide (CPW) filter is presented with a tuning range of 1.6:1 and four different states. The passband frequency of the filter is changed based on employing the capacitive loading effect of a liquid metal placed on top of each CPW resonator using three parallel micro-channels. In addition, because of the loading effect of the metal bridges, miniaturization by a factor of 40% is achieved. The filter is digitally tuned from 3.4 to 5.5 GHz with an insertion loss of less than 5.0 dB and a relative bandwidth of 5 0.35%. The RF power-handling capability of the filter is characterized using a customized measurement setup. It is observed that the filter can be used for input RF powers of up to 20 W for short-duration excitation conditions and 10 W for high-average-power excitation conditions. The filter is realized using common printed circuit board technology and a polydimethylsiloxane structure. Design methodology, simulation, and measurement results of the filter prototype are presented.

published proceedings


altmetric score

  • 3

author list (cited authors)

  • Saghati, A. P., Batra, J. S., Kameoka, J., & Entesari, K.

citation count

  • 33

complete list of authors

  • Saghati, Alireza Pourghorban||Batra, Jaskirat Singh||Kameoka, Jun||Entesari, Kamran

publication date

  • August 2015