**Author details**

the previous example, the filter is fed by reconfigurable MII structures with embedded CPWto-slotline transitions but uses quarter-wavelength resonators coupled by a slotline gap. When actuated, the SABs reduce the resonators' effective length, which in turn increases the resonance frequency. As a result, the filter center frequency is shifted up. **Figure 24(c)** shows the

**Figure 24.** (a) Second-order frequency-reconfigurable bandpass filter. (b) Detail of reconfigurable MIIs and SAB. (c) Filter

**Figure 23.** (a) Second-order bandwidth-reconfigurable bandpass filter. (b) Detail of reconfigurable MIIs and

reconfigurable inductive coupling *K*12. (c) Filter measured insertion loss and return loss.

measured insertion loss and return loss.

140 MEMS Sensors - Design and Application

Lluis Pradell1 \*, David Girbau2 , Miquel Ribó3 , Jasmina Casals-Terré<sup>4</sup> , Antonio Lázaro2 , Adrián Contreras1 , Marco Antonio Llamas1 , Julio Heredia1 , Flavio Giacomozzi5 and Benno Margesin5

\*Address all correspondence to: pradell@tsc.upc.edu


4 Department of EM, UPC, Barcelona, Catalonia, Spain

5 Fondazione Bruno Kessler, Trento, Italy
