The Fundamental Physics of Directive Beaming at Microwave and Optical Frequencies and the Role of Leaky Waves [PDF]
Proceedings of the IEEE, 2011 This review paper summarizes various aspects of directive beaming and explains these aspects in terms of leaky waves. Directive beaming occurs in antenna design where a narrow beam is obtainable by using fairly simple planar structures excited by a ...
David R Jackson +2 more
exaly +4 more sources
Leaky Wave Generation Through a Phased-Patch Array [PDF]
SensorsFor this article, we approximated the field of a leaky-wave antenna (LWA) with the field produced by a uniform linear array (ULA). This article aims to provide an initial framework for applications where the generation of an inhomogeneous wave is wished,
Alessandro Calcaterra +3 more
doaj +2 more sources
Surface Leaky Waves and Their Measurement [PDF]
1998 28th European Microwave Conference, 1998 A new approach to experimental identification of surface leaky waves on printed-circuit lines is presented in this paper. Active radiometry is used for field probing even in the near field zone. The measurement is adjusted into the X band. The method is demonstrated on the slotline.
Jan Zehentner +4 more
openaire +3 more sources
1-D Periodic Lattice Sums for Complex and Leaky Waves in 2-D Structures Using Higher Order Ewald Formulation [PDF]
IEEE Transactions on Antennas and Propagation, 2019 A very efficient and accurate method is proposed to evaluate the lattice sums (LSs) for the analysis of leaky waves in 2-D periodic waveguides. The LSs are the series involving Hankel functions of arbitrary order, which are not convergent for complex ...
V. Jandieri +3 more
semanticscholar +3 more sources
Non-contact ultrasonic gas flow metering using air-coupled leaky Lamb waves
Ultrasonics, 2018 HIGHLIGHTSA non‐contact ultrasonic method of gas flow metering in a duct is described.Leaky Lamb waves were generated and detected via airborne compression waves.The gas flow proportionally shifted the exit points of the leaky Lamb waves.The gas flow ...
Zichuan Fan +2 more
exaly +2 more sources
Calculation of leaky Lamb waves with a semi-analytical finite element method
Ultrasonics, 2014 A semi-analytical finite element method (SAFE) has been widely used for calculating dispersion curves and mode shapes of guided waves as well as transient waves in a bar like structures. Although guided wave inspection is often conducted for water-loaded
Takahiro Hayashi
exaly +2 more sources
Experimental and Theoretical Analysis of Rayleigh and Leaky-Sezawa Waves Propagating in ZnO/Fused Silica Substrates [PDF]
MicromachinesPiezoelectric c-axis oriented zinc oxide (ZnO) thin films, from 1.8 up to 6.6 µm thick, have been grown by the radio frequency magnetron sputtering technique onto fused silica substrates.
Cinzia Caliendo +4 more
doaj +2 more sources
Bessel-Gauss beams through leaky waves: Focusing and diffractive properties [PDF]
, 2020 Bessel-Gauss beams have mainly been proposed in optics as a solution for reducing the on-axis intensity oscillations typical of Bessel beams. Previous investigations on Bessel-Gauss beams are based on a scalar theory in the paraxial approximation, and ...
Galli, A +5 more
core +3 more sources
Contactless estimation of soil moisture using leaky Rayleigh waves and a fully convolutional network
Vadose Zone Journal, 2023 Soil moisture is a key factor that influences various aspects of ecosystem functioning. Measuring soil moisture without installing any objects in the soil is desirable because it allows for accurate characterizations of soil moisture while minimizing ...
Seoungmin Lee, Dong Kook Woo, Hajin Choi
doaj +1 more source
Optimized Leaky-Wave Antenna for Hyperthermia in Biological Tissue Theoretical Model
Sensors, 2023 In this paper, we exploit the enhanced penetration reachable through inhomogeneous waves to induce hyperthermia in biological tissues. We will present a leaky-wave antenna inspired by the Menzel antenna which has been shortened through opportune design ...
Alessandro Calcaterra +4 more
doaj +1 more source