scholarly journals Tunable Reflectarray Cell for Wide Angle Beam-Steering Radar Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
F. Venneri ◽  
S. Costanzo ◽  
G. Di Massa
Keyword(s):  
Phase Shifter ◽  
Tuning Range ◽  
Beam Steering ◽  
Wide Angle ◽  
Angular Range ◽  
Angular Region ◽  
Antenna Beam ◽  
Phase Tuning ◽  
Radar Applications ◽  
Electronically Tunable

An electronically tunable reflectarray element is proposed in this work to design beam-steering antennas useful for radar applications. A reduced size reflectarray unit cell is properly synthesized in order to extend the antenna beam scanning capabilities within a wider angular region. The radiating structure is accurately optimized to provide a full phase tuning range by adopting a single varactor load as phase shifter element. A 0.46λ-reflectarray cell is designed at the frequency of 11.5 GHz, obtaining a phase agility of about 330°. The cell is successfully adopted for the design of a21 × 21reconfigurable reflectarray. The antenna is numerically tested for different configurations of the varactors capacitance values, and good beam-steering performances are demonstrated within a wide angular range.

Phase shifter for antenna beam steering

2016 ◽  
Author(s):  
Ravi Jindal ◽  
Tchanguiz Razban
Keyword(s):  
Phase Shifter ◽  
Beam Steering ◽  
Antenna Beam

A V-/W-band 0.18-μm CMOS phase shifter MMIC with 180°-300° phase tuning range

2012 ◽  
Author(s):  
Yu-Sheng Su ◽  
Min-Chi Tsai ◽  
Jen-Chieh Wu ◽  
Ting-Yueh Chin ◽  
Chia-Chan Chang
Keyword(s):  
Phase Shifter ◽  
Tuning Range ◽  
W Band ◽  
Phase Tuning

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.

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