Giuseppe Macchiarella

Giuseppe Macchiarella (M’90─SM’06─F15) has been a Professor of Microwave Engineering with the Department of Electronic and Information, Polytechnic of Milan, Italy, until 2022. His research activity has covered several areas of microwave engineering:  microwave acoustics (SAW devices), radio wave propagation, numerical methods for electromagnetic, power amplifiers, linearization techniques, and passive devices. He has been the Scientific Coordinator of PoliEri, a Research Laboratory on monolithic microwave integrated circuits (MMIC) jointly supported by the Polytechnic of Milan and Ericsson Company. Currently, in addition to the consultancy activity, he continues with his research work, which mainly focuses on the synthesis of innovative configurations for microwave filters and multiplexers.  Prof. Macchiarella is the author or co-author of more than 200 papers in journals and conference proceedings. He has been responsible for several contracts and collaborations with various companies operating in the microwave industry. He has been invited as a speaker or session chair at many international conferences and workshops.

Prof. Macchiarella is a member of the IEEE Technical Committee MTT-5 (Filters) of which he was Vice-Chair from 2014 to 2016 and Chair from 2107 to 2018. He is a Fellow of IEEE.

In this lecture the most recent solutions for realizing compact and selective microwave filters are presented. The considered configurations exhibit an inline (or quasi-inline) topology with transmission zeros in the response (also very close to the passband).

Outline of the Lecture:

• New approximating functions allowing additional degrees of freedom

• Novel inline topologies with TZ in the response: Path and Extracted zeros

• Design procedures and examples (for 5G antennas)

• Quasi-inline filters with strongly-coupled resonators. Specific features and design techniques. Examples of design.

• Conclusions

Dimensioning the physical structure implementing a microwave filter is a tough task which requires extensive number crunching on powerful computers if faced with classical optimization techniques. An alternative approach to microwave filters dimensioning, based on both circuit and full-wave simulations, is introduced in this talk. This approach is much faster than the classical one because the full-wave (multi-port) simulation of the filter structure is used only to extract the universal filter parameters (resonating frequencies and coupling coefficients), while optimization of the frequency response is performed on the filter circuit model.

The lecture describes in detail the various steps of the proposed dimensioning technique, using real design examples to illustrate the practical implementation of the method.