A theoretical model for intense microwave pulse propagation in an air breakdown environment

1991 ◽  
Vol 3 (10) ◽  
pp. 2906-2912 ◽  
Author(s):  
S. P. Kuo ◽  
Y. S. Zhang
Keyword(s):  
Theoretical Model ◽  
Microwave Pulse ◽  
Pulse Propagation ◽  
Air Breakdown

Modelling and numerical simulation of microwave pulse propagation in an air-breakdown environment

1995 ◽  
Vol 53 (3) ◽  
pp. 253-266 ◽  
Author(s):  
J. Kim ◽  
S. P. Kuo ◽  
Paul Kossey
Keyword(s):  
Electron Density ◽  
Microwave Pulse ◽  
Pulse Propagation ◽  
Empirical Relation ◽  
Propagation Characteristics ◽  
Maximum Electron Density ◽  
Erosion Effect ◽  
Order Of Magnitude ◽  
Air Breakdown ◽  
Focused Beam

The dependences of the propagation characteristics of an intense microwave pulse on the intensity, frequency, width and shape of the pulse in an air- breakdown environment are examined. Numerical simulations lead to a useful empirical relation P3W = α = const, where P and W are the incident power and width of the pulse and α depends on the percentage of the pulse energy transferred from the source point to a given position. The results also show that, using a single unfocused microwave pulse transmitted upwards from the ground, the maximum electron density produced at, for example, 50 km altitude is limited by the tail erosion effect to below 106 cm-3. Repetitive-pulse and focused-beam approaches are then examined. Both approaches can increase the maximum electron density by no more than an order of magnitude. Hence a scheme using two obliquely propagating pulses intersecting at the desired height (e.g. 50 km) is considered. It is shown that the generated electron density at the lowest intersecting position can be enhanced by more than two orders of magnitude.

Modulation instability in nonlinear chiral fiber

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Demissie Jobir Gelmecha ◽  
Ram Sewak Singh
Keyword(s):  
Theoretical Model ◽  
Numerical Simulations ◽  
Pulse Propagation ◽  
Modulation Instability ◽  
Constitutive Relations ◽  
Gain Spectrum ◽  
Circularly Polarized ◽  
Left Handed ◽  
Simulation Results ◽  
The Difference

AbstractIn this paper, the rigorous derivations of generalized coupled chiral nonlinear Schrödinger equations (CCNLSEs) and their modulation instability analysis have been explored theoretically and computationally. With the consideration of Maxwell’s equations and Post’s constitutive relations, a generalized CCNLSE has been derived, which describes the evolution of left-handed circularly polarized (LCP) and right-handed circularly polarized (RCP) components propagating through single-core nonlinear chiral fiber. The analysis of modulation instability in nonlinear chiral fiber has been investigated starting from CCNLSEs. Based on a theoretical model and numerical simulations, the difference on the modulation instability gain spectrum in LCP and RCP components through chiral fiber has been analyzed by considering loss and chirality into account. The obtained simulation results have shown that the loss distorts the sidebands of the modulation instability gain spectrum, while chirality modulates the gain for LCP and RCP components in a different manner. This suggests that adjusting chirality strength may control the loss, and nonlinearity simultaneously provides stable modulated pulse propagation.

Effect of air breakdown on microwave pulse energy transmission

2017 ◽  
Vol 26 (2) ◽  
pp. 029201 ◽  
Author(s):  
Pengcheng Zhao ◽  
Lixin Guo ◽  
Panpan Shu
Keyword(s):  
Pulse Energy ◽  
Microwave Pulse ◽  
Energy Transmission ◽  
Air Breakdown
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