Luca Perregrini

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This paper presents the modeling of lossy substrate integrated waveguide interconnects and components by using the boundary integral-resonant mode expansion method. The extension of the numerical technique to account for conductor, dielectric and radiation losses is discussed. Moreover, a systematic investigation of the different contributions of loss and(More)
Substrate Integrated Waveguide (SIW) technology is the most promising candidate for the implementation of millimeter-wave (mm-wave) integrated circuits and systems for the next decade. Based on planar dielectric substrates with top and bottom metal layers perforated with metalized holes, SIW structures offer a compact, low loss, flexible, and cost-effective(More)
In this paper a novel compact Substrate Integrated Waveguide (SIW) filter is proposed. A wideband band pass filter for microwave and millimeter-wave systems is investigated at 80 GHz center frequency with 10.5% fractional bandwidth. A Conductor backed coplanar waveguide is inserted in Substrate Integrated Waveguide (SIW) structure as transition to achieve(More)
This paper presents an algorithm for the wide-band optimization of H- and E-plane waveguide components with irregular shapes. The algorithm is based on the boundary-integral-resonant-mode expansion method, used in conjunction with a variational technique, which permits the determination of the objective function and of its gradient by solving a single(More)
This paper presents the recent advances in the implementation of substrate integrated waveguide (SIW) components and circuits by additive manufacturing (AM) techniques. The use of AM allows introducing novel features in the design of SIW structures, ranging from fully three-dimensional geometries (impossibly to obtain with standard planar circuits(More)
The additive manufacturing technique of 3D printing has become increasingly popular for designs that have been previously unachievable due to cost and design complexity. Due to the special mechanical properties of NinjaFlex [1], there is great potential for its use in the 3D printed fabrications of numerous RF applications, such as strain sensors and(More)
This paper presents the design and fabrication of a broadband microstrip attenuator, operating at 1-20 GHz, based on few layer graphene flakes. The RF performance of the attenuator has been analyzed in depth. In particular, the use of graphene as a variable resistor is discussed and experimentally characterized at microwave frequencies. The structure of the(More)
A novel ridge substrate integrated waveguide (RSIW) with extended single-mode bandwidth is presented in this paper. The proposed structure is based on a substrate integrated waveguide including two dielectric layers with different permittivity. The ridge is implemented by a row of partial height metal vias, connected at the bottom by a metal strip. An RSIW(More)
This paper presents a systematic investigation of quarter-mode filters in substrate integrated waveguide (SIW) technology. This class of filters is particularly convenient because it combines the features of SIW structures with the improvement of size reduction. After a thorough analysis of the quarter-mode SIW cavity, this paper presents different coupling(More)