RF Generation in the GHz range using the concept of refraction negative index in nonlinear transmission lines for applications in communications systems.

• Grant number: 23/07047-4
• Support Opportunities: Scholarships abroad - Research
• Start date: January 12, 2026
• End date: January 11, 2027
• Field of knowledge: Engineering - Electrical Engineering - Electrical, Magnetic and Electronic Measurements, Instrumentation
• Principal Investigator: Lauro Paulo da Silva Neto
• Grantee: Lauro Paulo da Silva Neto
• Host Investigator: Edl Schamiloglu
• Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Federal de São Paulo (UNIFESP). Campus São José dos Campos. São José dos Campos , SP, Brazil
• Institution abroad: University of New Mexico (UNM), United States

Abstract

Nonlinear Transmission Lines (NLTLs) is a research area focused on generating radio frequency (RF) signals for applications in communication systems, radar, and mobile defense platforms. Their operation relies on the nonlinearity of electronic components under applied voltage (varactor diodes/capacitors) and/or applied current (inductors). The advantage of this technology lies in the development of compact systems capable of operating at high voltages, enabling the generation of high-power signals. This work proposes the development of a Left-Hand Nonlinear Transmission Line (LH-NLTL) using semiconductors and printed circuit boards (PCBs) designed for radio frequency operations. The development will test different semiconductor models, such as varactor and Schottky diodes, aiming to generate signals in the GHz range. Based on the proposer's research, a similar LH-NLTL research is lacking in our country. The motivation to pursue this research abroad is due to the advanced infrastructure available in the laboratories of the University of New Mexico (UNM), which is necessary for developing high-frequency and high-power technologies, facilities not available domestically. Furthermore, this request for funding to conduct research abroad seeks to continue the work funded by FAPESP under contract number 2020/04395-3 in collaboration with the U.S. research group with the same area of interest. This would strengthen international collaboration, enhance contributions at a global level.