In this paper, a novel tunable graphene-based bandstop filter/antenna-sensor is presented. This structure an integrated module that can be used to combine filtering and high-gain radiation performance. The initial design of the unit cell consists four U-shaped stubs loaded, resembling arms ring sensing layer in substrate. reflection transmission spectra are obtained for various graphene’s chemi...

This paper presents a reliable microwave and microfluidic miniature sensor dedicated to the measurement of glucose concentration in aqueous solution. The device; which is integrated with microtechnologies; is made of a bandstop filter implemented in a thin film microstrip technology combined with a fluidic microchannel. Glucose aqueous solutions have been characterized for concentration ranging...

We propose a series of integrated Bragg grating filters with performance enhancement via the concept effective medium. The bandstop are built in high-resistivity silicon wafer and operated over WR-3.4 band (220–330 GHz) in-plane polarization. proposed designs use an additional degree freedom controlling refractive index so as to fully potential structures. As result, high insertion loss typical...

This paper discusses the invariance of the second-order modes of 2-D separable denominator digital filters under frequency transformation. This paper first derives a state-space description for 2-D digital filters obtained by 2-D frequency transformation and then represents the controllability Gramians and the observability Gramians of the transformed 2-D digital filters. This description prove...