Multi-beam steering with low grating lobes using optimized unequally spaced phased array

2018 ◽  
Vol 427 ◽  
pp. 48-53 ◽  
Author(s):  
Bei Zhang ◽  
Yu Liu ◽  
Ziqi Zhao ◽  
Peng Yan
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
Unequally Spaced

Ultra-fast speed, low grating lobe optical beam steering using unequally spaced phased array technique

2007 ◽  
Vol 270 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Stuart (Shizhuo) Yin ◽  
Jae Hun Kim ◽  
Fei Wu ◽  
Paul Ruffin ◽  
Claire (Fang) Luo
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
Optical Beam ◽  
Fast Speed ◽  
Unequally Spaced ◽  
Grating Lobe

An Optimized Scheme for Optical Phased Array Beam Steering Controlled by Wavelength

PIERS Online ◽  
2007 ◽  
Vol 3 (2) ◽  
pp. 127-131 ◽  
Author(s):  
Ying Zhao ◽  
Xiaozhou Yang ◽  
Qin Cai ◽  
Weiwei Hu
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
Optical Phased Array

scholarly journals A Design Approach of Optical Phased Array with Low Side Lobe Level and Wide Angle Steering Range

Photonics ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 63
Author(s):  
Xinyu He ◽  
Tao Dong ◽  
Jingwen He ◽  
Yue Xu
Keyword(s):  
Phased Array ◽  
Phase Distribution ◽  
Beam Steering ◽  
Side Lobe ◽  
Design Approach ◽  
Optical Antennas ◽  
Side Lobe Level ◽  
Wide Angle ◽  
Spacing Distribution ◽  
Optical Phased Array

In this paper, a new design approach of optical phased array (OPA) with low side lobe level (SLL) and wide angle steering range is proposed. This approach consists of two steps. Firstly, a nonuniform antenna array is designed by optimizing the antenna spacing distribution with particle swarm optimization (PSO). Secondly, on the basis of the optimized antenna spacing distribution, PSO is further used to optimize the phase distribution of the optical antennas when the beam steers for realizing lower SLL. Based on the approach we mentioned, we design a nonuniform OPA which has 1024 optical antennas to achieve the steering range of ±60°. When the beam steering angle is 0°, 20°, 30°, 45° and 60°, the SLL obtained by optimizing phase distribution is −21.35, −18.79, −17.91, −18.46 and −18.51 dB, respectively. This kind of OPA with low SLL and wide angle steering range has broad application prospects in laser communication and lidar system.

Simultaneous beam steering of multiple signals based on optical wavelength-selective switch

2015 ◽  
Vol 7 (3-4) ◽  
pp. 391-398
Author(s):  
Giovanni Serafino ◽  
Antonio Malacarne ◽  
Claudio Porzi ◽  
Paolo Ghelfi ◽  
Marco Presi ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Integrated Circuit ◽  
Phase Shifter ◽  
Phased Array ◽  
Beam Steering ◽  
Array Antenna ◽  
Ring Resonators ◽  
Antenna Element ◽  
Phased Array Antenna ◽  
Wavelength Selective Switch

A novel, photonics-based scheme for the independent and simultaneous beam steering of multiple radio frequency signals at a wideband phased-array antenna is presented. As a proof of concept, a wavelength-selective switch (WSS) is employed both as a wavelength router to feed multiple antenna elements and as a tunable phase shifter to independently control the phase of each signal at any antenna element. In the experiment, two signals at 12.5 and 37.5 GHz are simultaneously fed to the four output ports of the WSS with independent and tunable phase shifts, emulating the independent steering of two signals in a four-element phased-array antenna. The results confirm the precision and flexibility of the proposed scheme, which can be realized both with bulk components or resorting to photonic integrated circuits, especially for wide-band applications. The architecture for a possible integrated implementation of the proposed solution is presented, employing a structure based on micro-ring resonator. Starting from these results, the feasibility of an integrated version of the presented architecture is also considered. The proposed photonic integrated circuit realizing the beam-forming network might be based on tunable true-time delay, as well as on phase shift through micro-ring resonators, and could be conveniently implemented with CMOS-compatible silicon technology.

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