Beam steering of a phased array by conjugate element phase shifting

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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Ka-band Full Polarization Reconfigurable 1D Beam Steering Staggered Butterfly Phased Array Antenna

2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting ◽

10.1109/ieeeconf35879.2020.9330297 ◽

2020 ◽

Author(s):

Ghanshyam Mishra ◽

Satish K. Sharma

Keyword(s):

Phased Array ◽

Beam Steering ◽

Array Antenna ◽

Phased Array Antenna ◽

Ka Band

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

Optics Communications ◽

10.1016/j.optcom.2006.11.001 ◽

2007 ◽

Vol 270 (1) ◽

pp. 41-46 ◽

Cited By ~ 12

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

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Integrated optical phased array based large angle beam steering system fabricated on silicon-on-insulator

10.1117/12.875491 ◽

2011 ◽

Cited By ~ 2

Author(s):

David N. Kwong ◽

Yang Zhang ◽

Amir Hosseini ◽

Ray T. Chen

Keyword(s):

Phased Array ◽

Beam Steering ◽

Large Angle ◽

Steering System ◽

Silicon On Insulator ◽

Integrated Optical ◽

Optical Phased Array

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

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078715000707 ◽

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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