The EML2 research group is involved with the design of microwave devices based on the use of MEMs technology combined with the Artificial Transmission Line (ATL) approach.
For instance, Fig.s 1 and 2, illustrate two very compact band-pass filter with a reconfigurable behaviour (see Figs. 1 and 2).
The filter showed in Fig. 1 consists of an ATL Branch-Line Coupler loaded with open ended stubs designed with a reconfigurable length by means of MEMS switches; this way, the proposed filter exhibits a reconfigurable pass-band bandwidth.
Similarly, the filter illustrated in Fig. 2 consists of two concentric stub-loaded rings; a group of three switches has been used to select the active ring, and consequently the filter working frequency.
Fig.1. Layout of the reconfigurable filter.
In Fig. 3 another reconfigurable filter is shown: it is a bandpass filter with a reconfigurable working frequency and a reduced size area .
 L. Corchia, G. Monti, L. Tarricone, “MEMS-Reconfigurable Bandpass Filter”, Microwave and Optical Technology Letters, vol. 50, no. 8, pp.: 2096-2099, August 2008
 G. Monti, L. Tarricone, L. Corchia, “MEMS-Based Filter with a Reconfigurable Pass-Band”, accepted in EuCAP, 23-27 March 2009, Berlin, Germany.