On the Paraxial Approximation and Phase-Gradient Methods for Risley Prism Inspired Beam-Steering Metasurface Antennas

2021 ◽  
Author(s):  
Jingru Wang ◽  
Yuehe Ge ◽  
Zhizhang David Chen
Keyword(s):  
Beam Steering ◽  
Gradient Methods ◽  
Paraxial Approximation ◽  
Phase Gradient

scholarly journals Spatiotemporal light control with frequency-gradient metasurfaces

Science ◽  
2019 ◽  
Vol 365 (6451) ◽  
pp. 374-377 ◽  
Author(s):  
Amr M. Shaltout ◽  
Konstantinos G. Lagoudakis ◽  
Jorik van de Groep ◽  
Soo Jin Kim ◽  
Jelena Vučković ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Beam Steering ◽  
Three Dimensional ◽  
Optical Control ◽  
Steering Angle ◽  
Experimental Realization ◽  
Phase Gradient ◽  
Power Efficient ◽  
On Chip ◽  
Frequency Gradient

The capability of on-chip wavefront modulation has the potential to revolutionize many optical device technologies. However, the realization of power-efficient phase-gradient metasurfaces that offer full-phase modulation (0 to 2π) and high operation speeds remains elusive. We present an approach to continuously steer light that is based on creating a virtual frequency-gradient metasurface by combining a passive metasurface with an advanced frequency-comb source. Spatiotemporal redirection of light naturally occurs as optical phase-fronts reorient at a speed controlled by the frequency gradient across the virtual metasurface. An experimental realization of laser beam steering with a continuously changing steering angle is demonstrated with a single metasurface over an angle of 25° in just 8 picoseconds. This work can support integrated-on-chip solutions for spatiotemporal optical control, directly affecting emerging applications such as solid-state light detection and ranging (LIDAR), three-dimensional imaging, and augmented or virtual systems.

scholarly journals Design and Implementation of Scalable Beam Steering Control System for Phased Array Radar

2019 ◽  
Vol 8 (9) ◽  
pp. 2984-2989
Keyword(s):  
Control System ◽  
Phased Array ◽  
Beam Steering ◽  
Control Unit ◽  
Steering Control ◽  
Control Logic ◽  
Phase Gradient ◽  
Phased Array Radar ◽  
And Control ◽  
Control System Architecture

Transmit/Receive (T/R) modules plays important role in advanced phased array radar system consists of array of antenna elements. In order to produce beam pattern for multiple radiating elements, the phase angle for each T/R module should be assigned with calculated value. When phase gradient is sent to T/R unit, phase values are calculated for array of elements associated with them. The paper presents a beam steering control system architecture consists of Graphical user interface, group controller with scalable T/R control unit (TRCU) having two hexa decagon T/R module controllers (HTRMCs) and control logic unit for parallel data flow. Calculation of 6 bit phase value from the phase gradient carried out using FPGA. Also, use of logic core and quantization of phase values are discussed. The paper also reports the area factor for the proposed architecture

Ultra-wideband, high-efficiency beam steering based on phase gradient metasurfaces

2015 ◽  
Vol 29 (16) ◽  
pp. 2163-2170 ◽  
Author(s):  
Y. Li ◽  
J. Zhang ◽  
S. Qu ◽  
J. Wang ◽  
Y. Pang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Beam Steering ◽  
Ultra Wideband ◽  
Phase Gradient

Antenna beam steering using phase gradient metasurface radome

2016 ◽  
Author(s):  
Yongfeng Li ◽  
Jieqiu Zhang ◽  
Mingde Feng ◽  
Yongqiang Pang ◽  
Hongya Chen
Keyword(s):  
Beam Steering ◽  
Phase Gradient ◽  
Antenna Beam

scholarly journals Novel silicon bipodal cylinders with controlled resonances and their use as beam steering metasurfaces

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Samar M. Fawzy ◽  
Ahmed M. Mahmoud ◽  
Yehea I. Ismail ◽  
Nageh K. Allam
Keyword(s):  
Electromagnetic Wave ◽  
High Performance ◽  
Beam Steering ◽  
Unit Cell ◽  
Geometrical Parameters ◽  
Dipole Mode ◽  
Phase Gradient ◽  
Cell Building ◽  
Phase Range ◽  
Wavefront Shaping

AbstractMetasurfaces have paved the way for high performance wavefront shaping and beam steering applications. Phase-gradient metasurfaces (PGM) are of high importance owing to the powerful and relatively systematic tool they offer for manipulating electromagnetic wave fronts and achieving various functionalities. Herein, we numerically present a novel unit cell known as bipodal cylinders (BPC), made of Silicon (Si) and placed on a Silicon dioxide (SiO2) substrate to be compatible with CMOS fabrication techniques and to avoid field leakage into a high index substrate. Owing to its geometrical structure, the BPC structure provides a promising unit cell for electromagnetic wave manipulation. We show that BPC offers a way to shift the electric dipole mode to a frequency higher than that of the magnetic dipole mode. We investigate the effect of varying different geometrical parameters on the performance of such unit cell. Building on that, a metasurface is then presented that can achieve efficient electromagnetic beam steering with high transmission of 0.84 and steering angle of 15.2°; with very good agreement with the theoretically predicted angle covering the whole phase range from 0 to 2$$\pi$$ π .

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