Results 81 to 90 of about 3,272 (195)
International Journal of Antennas and Propagation, Volume 2025, Issue 1, 2025.The radiation pattern of the broadband metasurface (MTS) antenna often has large sidelobe and large H‐plane cross‐polarization (cross‐pol) at high frequencies because both the fundamental mode and the higher order modes (HOMs) have large sidelobe at these frequencies. However, as for the above two reasons that leading to deterioration of high‐frequency
Liu Hailong +8 more
wiley +1 more source
A High-Gain Transmitarray for Generating Dual-Mode OAM Beams
IEEE Access, 2018 This paper proposes a novel transmitarray antenna which can achieve high gain and produce dual-mode orbital angular momentum (OAM) beams in Ku-band. Two back-to-back wideband dual-polarized microstrip antennas are employed as the unit cells, which are ...
Fan Qin +5 more
doaj +1 more source
Evaluation of glass welding by ultrashort pulse laser [PDF]
, 2008 It is considered that fusion welding should be the most promising technique in glass joining, since joining can be accomplished without any intermediated layer and mechanical contact.
Mohid, Zazuli
core
A Compact Ultralow‐Profile Wideband and High‐Efficiency Folded Transmitarray
International Journal of RF and Microwave Computer-Aided Engineering, Volume 2025, Issue 1, 2025.A compact ultralow‐profile wideband and high‐efficiency folded transmitarray antenna (FTA) is proposed in this letter. It consists of three parts: a top transmission surface (TS), a bottom reflection surface (RS), and an embedded compact planar feed. Using the principle of ray tracing and introducing additional phase compensation in the RS, the antenna
Meizi Wu, Lu Guo, Matteo Bruno Lodi
wiley +1 more source
Sub-THz Polarization-Dependent Beam-Steerable Metasurface Antenna-in-Package for 6G Communication Constructed Using an LTCC Process [PDF]
Journal of Electromagnetic Engineering and ScienceIn this paper, a polarization-dependent beam-steerable metasurface lens that is integrated with an antenna-in-package (AiP) using a single low-temperature co-fired ceramic (LTCC) process is proposed for sub-terahertz applications.
Seongwoog Oh +2 more
doaj +1 more source
Pengaruh kualiti cd mata pelajaran lukisan terbantu komputer dengan menggunakan perakam skrin camtasia studio terhadap motivasi, kefahaman dan pencapaian pelajar [PDF]
, 2007 Multimedi a interakti f tela h memperoleh i perhatia n yan g tingg i dala m bidan g pengajara n da n pembelajaran . Medi a interakti f sepert i C D yan g berkualit i dapa t membuk a peluan g untu k pembelajara n pelaja r yan g akti f da n membant u ...
Tan, Wei Sin
core
Accurate metasurface synthesis incorporating near-field coupling effects
, 2019 One of the most promising metasurface architectures for the microwave and terahertz frequency ranges consists of three patterned metallic layers separated by dielectrics.
Olk, Andreas E., Powell, David A.
core +1 more source
IEEE Access, 2020 This paper describes a wideband, low-profile and efficiency-improved transmitarray antenna achieved by employing over-1-bit phase-shifting elements and incorporating optimized phase compensation scheme.
Fan Wu +3 more
doaj +1 more source
RF system calibration for global Q matrix determination
, 2015 The use of multiple transmission channels (known as Parallel Transmission, or PTx) provides increased control of the MRI signal formation process.
Beqiri, A +3 more
core +1 more source
Investigation of microwave power transfer near sea surface with 2D parabolic equation method
IET Power Electronics, Volume 17, Issue 15, Page 2278-2287, 25 November 2024.Due to the existence of the evaporation duct near‐sea‐surface described as an inhomogeneous refractive index of the atmosphere, microwaves can be trapped in the duct and propagate along it. To investigate wireless power transfer over the sea surface, we utilize the two‐dimensional parabolic equation to calculate the electric field distribution and to ...
Jinyi Hui +4 more
wiley +1 more source