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11 495 (0,138s) •

Result

The regularity of geodesics in impulsive pp-waves

We consider the geodesic equation in impulsive pp-wave space-times in Rosen form, where the metric is of Lipschitz regularity. We prove that the geodesics (in the sense of Caratheodory) are actually continuously differentiable, thereby rigor...

BE - Teoretická fyzika

  • 2014
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  • Jx
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  • Link
Result

Transient Response Optimization of Ultra Wideband Antennas (Using Particle Swarm Optimization)

for the dipole shape, which accomplishes two required parameters - namely good matching is evaluated from the derivative of the excitation impulse with the radiated impulse wideband dipole is perfectly matched and...

JA - Elektronika a optoelektronika, elektrotechnika

  • 2006
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  • A
Result

The global existence, uniqueness and C-1-regularity of geodesics in nonexpanding impulsive gravitational waves

We study geodesics in the complete family of nonexpanding impulsive gravitational waves propagating in spaces of constant curvature, that is Minkowski, de Sitter and anti-de Sitter universes. Employing the continuous form of the metric we (i...

BE - Teoretická fyzika

  • 2015
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  • Jx
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  • Link
Result

The global uniqueness and C-1-regularity of geodesics in expanding impulsive gravitational waves

We study geodesics in the complete family of expanding impulsive gravitational waves propagating in spaces of constant curvature, that is Minkowski, de. Sitter (in the sense of Filippov) and study their interaction with the impulsive

BE - Teoretická fyzika

  • 2016
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  • Jx
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  • Link
Result

Ultra Wideband Dipole Antenna Optimization

This paper describes optimization of the palanar ultra wideband dipole antennas, which are optimized for perfect matching and perfect impulse radiation antennas could beused as an impulse-shaping filter for forming of trans...

JA - Elektronika a optoelektronika, elektrotechnika

  • 2006
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  • Jx
Result

Comparison of recursive parameter estimation and non-linear filtration

demonstrate a match in the evolution of the parameter estimates. Recursive impulse response functions are compared on two cases, which also match. Although not all of the results obtained from two different methodologies c...

AH - Ekonomie

  • 2012
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  • D
Result

Radiation Characteristics of Optimized Ultra Wideband Printed Dipoles for Different Impulse Excitations

shape, which accomplishes two required parameters - good matching and minimal distortion. As a result, the optimized ultra wideband dipole is perfectly matched. A particular attention is paid to the different impulse excit...

JA - Elektronika a optoelektronika, elektrotechnika

  • 2007
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  • D
Result

EFFECTIVE TIME-DOMAIN ANTENNA MODELING BASED ON IMPULSE-MATCHING METHOD

This paper deals with analysis and optimization of wideband and ultra wideband antenna structures in the time domain by numerical solvers. In proposed method, signals at port and field probes at far- field region are used as powerful and effective ma...

JA - Elektronika a optoelektronika, elektrotechnika

  • 2009
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  • D
Result

Distortion Minimization of Radiated Impulses of Tapered Slot Vivaldi Antenna for UWB Application

The paper deals with the optimization of the Vivaldi antenna, which is suitable for the measurement of impulse radiation characteristics. In case of particular ultra wideband. The optimization accomplishes three required parameters - good

JA - Elektronika a optoelektronika, elektrotechnika

  • 2008
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  • Jx
Result

Synchronized CMOS RF Switch

the measurement of on-the-market DVB-T receivers on tolerance to impulsive noise (FFT frame) to inject impulsive noise in exact position within the useful part of OFDM symbol. Thus, the impulsive interference test-retest r...

JA - Elektronika a optoelektronika, elektrotechnika

  • 2010
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  • Gfunk
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