Results 31 to 40 of about 911 (207)
, 2022 Focus scanning is critically important in many terahertz (THz) imaging and sensing applications. A traditional single focusing transmitarray can achieve a good focus when the source is on-axis but moving the source off-axis produces a significant ...
Ka Fai Chan (10491635) +4 more
core +3 more sources
Three Phase Resolution Transmitarray Element for Electronically Reconfigurable Transmitarrays
Journal of Research and Development on Information and Communication Technology, 2019 Electrical beam scanning is a feature enabling an antenna array to electrically control its main beam toward a desired direction. In this paper, a three-phase state element for electronically reconfigurable transmitarrays is presented. The element is made up of C-patches and modified ring slots loaded rectangular gaps.
Nguyễn Minh Thiện +2 more
openaire +2 more sources
Multifunctional Cascaded Metamaterials: Integrated Transmitarrays [PDF]
IEEE Transactions on Antennas and Propagation, 2016 Control of electromagnetic waves using engineered materials is very important in a wide range of applications, therefore there is always a continuous need for new and more efficient solutions. Known natural and artificial materials and surfaces provide a particular functionality in the frequency range they operate but cast a "shadow" and produce ...
Elsakka, Amr A. +5 more
openaire +3 more sources
Wideband Transmitarray With Reduced Profile [PDF]
IEEE Antennas and Wireless Propagation Letters, 2018 This letter presents a wideband transmitarray (TA) with reduced profile. A novel unit cell based on a wideband bandpass filter is developed and applied to the design of the TA. The TA consists of two identical tri-layer frequency selective surfaces (FSS), thus it has a lower profile compared to traditional designs which use at least four FSS layers ...
Qi Luo +3 more
openaire +1 more source
Digitally Reconfigurable Transmitarray With Beam-Steering and Polarization Switching Capabilities
IEEE Access, 2021 In this paper, a novel digitally reconfigurable unit-cell and $4\times 4$ transmitarray operating at X-band is proposed that allows the implementation of beamforming and polarization conversion operations in a programmable way.
Biswarup Rana, In-Gon Lee, Ic-Pyo Hong
doaj +1 more source
Synthesis of Transmitarrays via Convex Relaxation
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, 2020 A mathematical approach for the phase-only synthesis of transmitarray antennas based on iterative convex optimization is presented. Using semidefinite relaxation techniques, the proposed framework is suitable for a wide range of beam shaping applications.
Foglia Manzillo, Francesco +4 more
openaire +2 more sources
Nano-Dielectric Resonator Antenna Reflectarray/Transmittarray for Terahertz Applications
Advanced Electromagnetics, 2015 Nanoantennas have introduced wide bandwidth for fast data communications. The material properties of good conducting metals introduce plasmonic behavior at Terahertz frequencies.
H. A. Malhat +3 more
doaj +1 more source
Applied Sciences, 2022 This study designed a multi-functional reconfigurable transmitarray with switchable polarization and beam steering capabilities using only a PIN diode having ON/OFF switching ability.
In-Gon Lee, Jong-Yeong Kim, Ic-Pyo Hong
doaj +1 more source
Multichannel full-space coding metasurface with linearly-circularly-polarized wavefront manipulation. [PDF]
NanophotonicsAbstract Achieving independent multitasked wavefront control by using an ultrathin plate is a challenge to increase information capacity in integration optics and radar applications. Transmission‐reflection‐integrated metasurface provides an efficient recipe primarily for multifunctional meta‐device, however it is challenging to synergize both linear ...
Luo H +8 more
europepmc +2 more sources
Dual-Band Quad-Polarized Transmitarray for 5G Mm-Wave Application
IEEE Access, 2021 A dual-band quad-polarized transmitarray (TA) is designed in a common aperture operating at 25.9/39.8 GHz. Using narrow strip patches as cells, the 25.9 GHz cells are arranged in the ±45° direction, and the 39.8 GHz cells are arranged in ...
Lin-Hui He, Yong-Ling Ban, Gang Wu
doaj +1 more source