Results 31 to 40 of about 5,894 (171)
Optimizing an array of antennas for cellular coverage from a high altitude platform [PDF]
, 2003 In a wireless communications network served by a high altitude platform (HAP) the cochannel interference is a function of the antenna beamwidth, angular separation and. sidelobe level.
Capstick, M H +3 more
core +1 more source
Advanced Functional Materials, Volume 36, Issue 12, 9 February 2026.This study explores the benefits of metasurfaces made from functional materials, highlighting their ability to be adapted and improved for various high‐frequency applications, including communications and sensing. It first demonstrates the potential of these functional material‐based metasurfaces to advance the field of sub‐THz perceptive networks ...
Yat‐Sing To +5 more
wiley +1 more source
Advanced Materials Technologies, Volume 11, Issue 4, 19 February 2026.An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim +4 more
wiley +1 more source
Terahertz Chiral Recognition Based on Metasurfaces
Advanced Photonics Research, Volume 7, Issue 2, February 2026.A novel terahertz chiral sensing method based on a multilayer metallic metasurface is proposed. The left‐handed circularly polarized and right‐handed circularly polarized components in the linearly polarized illuminating light into two focal points and convert them back into linear polarization for convenient measurement.
Xuyang Ji +5 more
wiley +1 more source
Time-Frequency Warped Waveforms [PDF]
, 2019 The forthcoming communication systems are advancing towards improved flexibility in various aspects. Improved flexibility is crucial to cater diverse service requirements.
Arslan, Huseyin +2 more
core +2 more sources
Advanced Science, Volume 13, Issue 7, 3 February 2026.This study presents a femtosecond laser‐based ultrashort pulse dicing system that uses a non‐diffracting Bessel beam to shape the femtosecond laser. The use of femtosecond Bessel beam shaping and high‐speed scanning enables rapid material removal that outpaces thermal diffusion, thereby suppressing melting, minimizing the HAZ, and reducing sidewall ...
Shunshuo Cai +12 more
wiley +1 more source
Analytical and experimental investigation of sidelobe suppression techniques for reflector type spacecraft antenna Final technical report [PDF]
Near axis sidelobe suppression techniques for circularly polarized reflector type spacecraft ...
Goebels, F. J., Jr. +2 more
core +1 more source
Two Dimensional Array Imaging with Beam Steered Data
, 2013 This paper discusses different approaches used for millimeter wave imaging of two-dimensional objects. Imaging of a two dimensional object requires reflected wave data to be collected across two distinct dimensions.
Patole, Sujeet, Torlak, Murat
core +1 more source
Advanced Science, Volume 13, Issue 6, 30 January 2026.This work introduces a beamforming‐based method to generate acoustic images from fiber‐optic distributed acoustic sensing (DAS) data. By performing 2D scanning around the sensing fiber, the approach enables near‐field imaging and localization of acoustic sources, even in regions distant from the fiber. A data‐driven DAS channel selection improves image
Marcelo A. Soto +1 more
wiley +1 more source
Accuracy of velocity and power determination by the Doppler method [PDF]
When designing a Mesosphere-Stratosphere-Troposphere (MST) radar antenna one has to trade between the choices to optimize the effective aperture or to optimize the sidelobe suppression.
Rottger, J.
core +1 more source