scholarly journals Numerical Simulations of Nonlinear Interaction of Space Charge Waves in Microwave and Millimeter Wave Range in n-InN Films Using Negative Differential Conductivity

2014 ◽  
Vol 04 (03) ◽  
pp. 136-142
Author(s):  
Abel Garcia-Barrientos ◽  
Volodymyr Grimalsky
Keyword(s):  
Space Charge ◽  
Numerical Simulations ◽  
Millimeter Wave ◽  
Nonlinear Interaction ◽  
Negative Differential Conductivity ◽  
Differential Conductivity ◽  
Millimeter Wave Range ◽  
Wave Range ◽  
Space Charge Waves

scholarly journals Microwave synthesis of Bessel, Bessel–Gauss, and Gaussian beams: a fully vectorial electromagnetic approach

2021 ◽  
pp. 1-8
Author(s):  
Walter Fuscaldo ◽  
Alessio Benedetti ◽  
Davide Comite ◽  
Paolo Burghignoli ◽  
Paolo Baccarelli ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Electromagnetic Fields ◽  
Millimeter Wave ◽  
Microwave Synthesis ◽  
Wave Theory ◽  
Gaussian Beams ◽  
Scalar Wave ◽  
Leaky Waves ◽  
Millimeter Wave Range ◽  
Wave Range

Abstract Bessel, Bessel-Gauss, and Gaussian beams have widely been investigated in optics in the paraxial approximation, under the frame of a scalar wave theory. Such approximations can hardly be applied in the microwave/millimeter-wave range, where the vectorial nature of the electromagnetic fields cannot be neglected, and experimental realizations for some of these beams appeared only recently. In this work, we discuss the generation of Bessel, Bessel-Gauss, and Gaussian beams through a fully vectorial electromagnetic approach. The field derivation of all these beams is first illustrated and numerical evaluations are then reported to compare their different propagation and diffractive behaviors. Finally, an innovative approach for realizing such solutions with planar microwave devices exploiting leaky waves is demonstrated through accurate numerical simulations.

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