Results 261 to 270 of about 2,697,867 (333)
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Proceedings of the IEEE, 2012
This paper gives a basic review and a summary of recent developments for leaky-wave antennas (LWAs). An LWA uses a guiding structure that supports wave propagation along the length of the structure, with the wave radiating or “leaking” continuously along the structure. Such antennas may be uniform, quasi-uniform, or periodic.
David R. Jackson +2 more
openaire +1 more source
This paper gives a basic review and a summary of recent developments for leaky-wave antennas (LWAs). An LWA uses a guiding structure that supports wave propagation along the length of the structure, with the wave radiating or “leaking” continuously along the structure. Such antennas may be uniform, quasi-uniform, or periodic.
David R. Jackson +2 more
openaire +1 more source
Beam Forming of Leaky Waves at Fixed Frequency Using Binary Programmable Metasurface
IEEE Transactions on Antennas and Propagation, 2018We propose a complete procedure for synthesizing radiation patterns of leaky waves using binary programmable metasurface. As an example, a binary leaky-wave antenna (BLWA) is designed and fabricated using the fast procedure.
X. Wan +4 more
semanticscholar +1 more source
Planar Antenna Design for Omnidirectional Conical Radiation Through Cylindrical Leaky Waves
IEEE Antennas and Wireless Propagation Letters, 2018An annular periodic leaky-wave antenna (LWA) fed by a simple azimuth-symmetric source is designed to generate a high-gain omnidirectional conical-beam pattern, which scans with frequency over a wide angular range.
D. Comite +6 more
semanticscholar +1 more source
Study on PCA-SAFT imaging using leaky Rayleigh waves
, 2020Efficient and accurate nondestructive testing of surface or sub-surface flaws is essential for metal components. This study focuses on the high-quality image reconstruction of these flaws.
Xiaowei Shen +3 more
semanticscholar +1 more source
Review of Recent Advances in the Leaky-Wave Analysis of 2-D Leaky-Wave Antennas
2020 14th European Conference on Antennas and Propagation (EuCAP), 2020Recent developments are reviewed in the area of leaky-wave analysis of two-dimensional (2-D) leaky-wave antennas. Recent results are reviewed in three areas: (1) new beamwidth formulas for 2-D leaky-wave antennas, (2) leakywave analysis of wideband Fabry-Perot cavity antennas, and (3) leaky-wave analysis of 2-D periodic leaky-wave antennas (those that ...
Jackson D. R. +7 more
openaire +2 more sources
2016
Millimeter waveguides, such as coplanar lines, microstrip lines and dielectric guides, are open structures where energy leakage is bound to occur. This leakage can occur, for example, when there are discontinuities in the guiding structure, or perhaps when the guide is excited in an inappropriate mode.
GALLI, Alessandro +2 more
+5 more sources
Millimeter waveguides, such as coplanar lines, microstrip lines and dielectric guides, are open structures where energy leakage is bound to occur. This leakage can occur, for example, when there are discontinuities in the guiding structure, or perhaps when the guide is excited in an inappropriate mode.
GALLI, Alessandro +2 more
+5 more sources
International Journal of Electronics, 1978
A new type of leaky wave called a alow leaky wave is reported. The slow leaky waves have a phase velocity less than the velocity of light but radiate in a direction away from end-fire.
RAMESH GARG, K. C. GUPTA
openaire +1 more source
A new type of leaky wave called a alow leaky wave is reported. The slow leaky waves have a phase velocity less than the velocity of light but radiate in a direction away from end-fire.
RAMESH GARG, K. C. GUPTA
openaire +1 more source
Microwave generation of X-waves by means of a planar leaky-wave antenna
Applied Physics Letters, 2018We analyze and experimentally demonstrate the possibility of generating X-waves at microwave and millimeter-wave frequencies by means of a partially open radial parallel-plate waveguide antenna.
D. Comite +7 more
semanticscholar +1 more source