A Ka-Band, High Efficiency, Small Size Spatial Combiner (SPC) is proposed in this paper, which uses an innovatively matched quadruple Fin Lines to microstrip (FLuS) transitions. At the date of paper and at Author's best knowledge no such FLuS innovative transitions have been reported literature before. These are inserted into a WR28 waveguide T-junction, order allow integration 16 Monolithic Microwave Integrated Circuit (MMIC) Solid State Power Amplifiers (SSPA's). computational...

This paper proposes a particular design technique of an 8 slots resonant cavities X-Band Magnetron. Such study is based on Multiphysics (MP) simulation and consider thermal-structural effects due to the cathode heating, taking into account that electromagnetic behavior thus device efficiency depend critically operating temperature related thermal induced displacements materials. The proposed involves Thermal Stress (TS), Eigen-frequency (EF) Particle Tracing (PT) analysis performed with...

This paper describes the design based on a Multiphysics simulation for waveguide X-Band Fin Taper (FT) Spatial Power Combiner. The proposed device uses Lines to microstrip transition (FLuS) convert energy from rectangular (WG) TE10 fundamental mode (μS) transmission line (TL) quasi-TEM (q-TEM) mode, in order be amplified by Solid-State Amplifiers. An alteration of electromagnetic behavior can produced temperature increase and geometrical displacement induced thermal expansion structure due...

A broad-band transmission line spatial power combiner (SPC) is proposed in this paper, which uses a square coaxial (Squarax) (TL). This structure has some advantages over the traditional circular combiner, have been described paper. Fin-Line to microstrip transitions are inserted into Squarax TL, order allow an easy integration of Monolithic Microwave Integrated Circuit (MMIC) Solid State Power Amplifler (SSPA). The SPC geometry allows feeding higher number MMIC than Waveguide SPC, so that...

A novel real-time charged particle detector for medical accelerators is proposed in this paper. The system, by means of a passive resonant cavity, performs non destructive measurement the beam current and provides real time monitoring absorbed dose delivered to patient. system complies with requirements relevant International Standards being used as Radiation Detector Charged Particles. formulated theory allows design versus accelerator features providing analytical formulas development...

The design and the fully coupled Thermodynamic Structural Mechanics simulation of a Spatial Power Amplifier are described in this paper. amplifier is realized WR90 waveguide, employing Fin-Line Transitions Monolithic Microwave Integrated Circuit Solid State Amplifiers. Global performances active devices combining structure have critical dependence to thermo-mechanical condition operation. temperature alterations thermal expansions, related power dissipation devices, been analyzed order lead...

This paper describes the design of an X-Band Magnetron to Linear Accelerator (LINAC) High Power Transfer System consisting in 8 resonant cavities connected a dedicated vacuum Dielectric Window (DW).A main analytical devices is shown with compact formulas and followed by numerical optimization.Electromagnetic Thermomechanical coupling between these described, particular attention has been given power DW matching.A Multiphysics modeling proposed consider thermal-structural effects due cathode...

A Spatial Power Combiner is proposed using an innovative waveguide to microstrip transition capable divide the electric field in six equal parts per card. This device can combine 12 MMIC Solid State Amplifiers whole X Band with 13 dB of return loss and only 2.2 losses a small size, high power efficiency system.

This paper deals with a broadband TE10 to TE20 mode transformer in WR90 rectangular waveguide more than 35 dB suppression of the fundamental and only 0.4 maximum transformation loss. Two fin lines are employed appropriate configuration order obtain transformation.

Nano Air Vehicles (NAVs), are gaining more and interest popularity. Currently, the NAVs powered by high energy density lithium-ion or lithium polymer batteries. The flight time (FT) is usually limited between 5 20 minutes before requiring a forced recovery to replace exhausted In several scenarios, where human intervention cannot be performed, e.g., toxic radiation environments, batteries might impossible. FT becoming challenge in design of these small objects. Energy harvesting an...

This paper proposes a particular design technique of an X-Band Magnetron to Linear Accelerator (LINAC) High Power Transfer System consisting in 8 resonant cavities connected dedicated vacuum Dielectric Window. Such study is based on Multiphysics modeling and considers thermal-structural effects due the cathode heating for Joule effect In this paper, shown how compensate thermal induced degradation device performances, by exploiting consequent Thermo - mechanical deformation opportunely...

A computational model of a Buncher cavity for millimetric klystron following Multiphysics approach is proposed in this paper. At these narrow dimensions, the device critically exposed to multiple physics effects, due power dissipations and external environment, influencing electromagnetic performances. The integrated with carbon nanotube cold cathode order reduce thermal expansion cooled by an opportune airflow that regulates temperature distribution compensate resonant frequency shift....

In this article the new frontier in Spatial Power Amplifiers is shown, with particular attention to their Space Applications. These amplifiers have fact characteristic of High RF Power, Solid State Technology and Density due small sizes that can be reached. We will show performances three employing spatial combining technique, two prototypes X-Band one Ka-Band, a brief description design approach. belong Single Waveguide group SPC family, thus WR90 WR28 waveguides are employed. Very good...

This paper proposes a technique to design wide band switched-line (SL) true-time-delay (TTD) networks, commonly used for phased array antenna (PAA) applications. study investigates the constant-delay behavior of phase shifters based on single-pole double-throw (SPDT) switches. Circuit sizing starts by considering effective S-parameters switches, use their non-idealities as an integral part shift linearly dependent frequency and considering, from beginning, possible spatial positioning...

A multiphysics-based modeling design of a low energy electron source using thermionic cathode is described in this paper. The proposed device produces narrow beam employable delicate applications where dimensions are critical. effects multiple physics influencing factors due to the heating over dynamics have been predicted through multiphysics approach. This paper would provide needed knowledge for virtual prototyping such devices. For aim, several strategies adopted obtain simple model,...