Lorenzo Valletti
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View article: Progress in the development of the ICRF system of DTT
Progress in the development of the ICRF system of DTT Open
View article: Table of Contents
Table of Contents Open
View article: A New Theoretical Approach of Studying Resonances in Single Finline Transitions
A New Theoretical Approach of Studying Resonances in Single Finline Transitions Open
In this article an innovative method of studying and removing the resonances, inherently exhibit by some waveguide to microstrip transitions, is presented. By modeling an equivalent circuit, this new approach allows to obtain the construct…
View article: Innovative Mode Enhancement for High Power Coaxial Vircators
Innovative Mode Enhancement for High Power Coaxial Vircators Open
The size and weight of a high power microwave (HPM) source can make a difference in strategic use. The compactness of the virtual cathode oscillator (vircator) is undoubtedly the most significant advantage of this device. Civil industry an…
View article: A New Theoretical Approach of Studying Resonances in Single Finline Transitions
A New Theoretical Approach of Studying Resonances in Single Finline Transitions Open
In this article an innovative method of studying and removing the resonances, inherently exhibit by some waveguide to microstrip transitions, is presented. By modeling an equivalent circuit, this new approach allows to obtain the construct…
View article: Studies of a Ka-band high power klystron amplifier at INFN-LNF
Studies of a Ka-band high power klystron amplifier at INFN-LNF Open
In the framework of the Compact Light XLS project [1], a Ka-band linearizer with electric field ranging from 100 to 150 MV/m is requested [2, 3, 4]. In order to feed this structure, a proper Ka-band high power klystron amplifier with a hig…
View article: An Innovative Lens Type FinLine to Microstrip Transition
An Innovative Lens Type FinLine to Microstrip Transition Open
Due to the disadvantages of vacuum tubes in terms of warm-up time, size, and high-voltage needs, solid-state power amplifiers (SSPAs) with gallium nitride (GaN) monolithic microwave integrated circuits (MMICs) are the key solution for powe…
View article: Efficiency Enhancement for an S-Band Axial Vircator Using 5-Stage Two-Step Tapered Radiators
Efficiency Enhancement for an S-Band Axial Vircator Using 5-Stage Two-Step Tapered Radiators Open
An S-band multistage axial virtual cathode oscillator with efficiency enhancement for high pulsed power electromagnetic applications is presented. The Particle-in-Cell (PIC) results of the designed 5-stage Vircator, with two-step negative …
View article: An Innovative Odd-Power Divider by means of a Triple FinLine Waveguide to Microstrip Transition
An Innovative Odd-Power Divider by means of a Triple FinLine Waveguide to Microstrip Transition Open
This paper outlines a novel approach to design a waveguide to microstrip Finline transition, that allows a division by three of the RF power traveling inside a rectangular waveguide. The possibility of obtaining and odd power division of m…
View article: Multiphysics Design of High-Power Microwave Vacuum Window
Multiphysics Design of High-Power Microwave Vacuum Window Open
This paper presents the Multiphysics Analysis of a High-Power Microwave Window for a Ka-Band Klystron providing 16MW of peak power. After the optimization of the electromagnetic performances, we analyze the effect of RF heating effect and …
View article: HIGH POWER DENSITY SPATIAL COMBINER FOR THE Q-BAND, READY FOR SPACE APPLICATIONS
HIGH POWER DENSITY SPATIAL COMBINER FOR THE Q-BAND, READY FOR SPACE APPLICATIONS Open
This paper outlines the design characterization and electromagnetic performance of a millimeter-wave high power combining structure, which exploits the spatial power combination technique.The input matching is always below 10 dB over the e…
View article: Virtual Prototype of Innovative Ka-Band Power Amplifier Based on Waveguide Polarizer
Virtual Prototype of Innovative Ka-Band Power Amplifier Based on Waveguide Polarizer Open
This paper outlines an innovative approach to design a spatial power-combining structure based on waveguide polarizers. It presents the 3D CAD model of the new structure with the transversal probes and considerations in positioning and opt…