Realization and validation of continuous tunable metasurface for high resolution beam steering reflector at K‐band frequency

2021 ◽  
Author(s):  
David Rotshild ◽  
Amir Abramovich
Keyword(s):  
High Resolution ◽  
Beam Steering ◽  
Band Frequency ◽  
K Band

scholarly journals Phase-only transmissive spatial light modulator based on tunable dielectric metasurface

Science ◽  
2019 ◽  
Vol 364 (6445) ◽  
pp. 1087-1090 ◽  
Author(s):  
Shi-Qiang Li ◽  
Xuewu Xu ◽  
Rasna Maruthiyodan Veetil ◽  
Vytautas Valuckas ◽  
Ramón Paniagua-Domínguez ◽  
...  
Keyword(s):  
High Resolution ◽  
Spatial Light Modulator ◽  
Deflection Angle ◽  
Beam Steering ◽  
Beam Deflection ◽  
Spatial Light Modulators ◽  
Light Modulator ◽  
Steering Angle ◽  
Holographic Display ◽  
Light Modulators

Rapidly developing augmented reality, solid-state light detection and ranging (LIDAR), and holographic display technologies require spatial light modulators (SLMs) with high resolution and viewing angle to satisfy increasing customer demands. Performance of currently available SLMs is limited by their large pixel sizes on the order of several micrometers. Here, we propose a concept of tunable dielectric metasurfaces modulated by liquid crystal, which can provide abrupt phase change, thus enabling pixel-size miniaturization. We present a metasurface-based transmissive SLM, configured to generate active beam steering with >35% efficiency and a large beam deflection angle of 11°. The high resolution and steering angle obtained provide opportunities to develop the next generation of LIDAR and display technologies.

Wide-angle, high-resolution three-dimensional (3D) imaging using non-mechanical beam steering

2021 ◽  
Author(s):  
Christopher L. Hoy ◽  
Jay Stockley ◽  
Kelly Kluttz ◽  
Doug McKnight ◽  
Lance Hosting ◽  
...  
Keyword(s):  
High Resolution ◽  
3D Imaging ◽  
Beam Steering ◽  
Three Dimensional ◽  
Wide Angle

scholarly journals Design and Realization of Band Pass Filter in K-Band Frequency for Short Range Radar Application

2021 ◽  
Vol 21 (1) ◽  
pp. 1
Author(s):  
Arie Setiawan ◽  
Taufiqqurrachman Taufiqqurrachman ◽  
Adam Kusumah Firdaus ◽  
Fajri Darwis ◽  
Aminuddin Rizal ◽  
...  
Keyword(s):  
Insertion Loss ◽  
Short Range ◽  
Return Loss ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Frequency ◽  
Measurement Results ◽  
Band Pass ◽  
Bandwidth Analysis ◽  
K Band

Short range radar (SRR) uses the K-band frequency range in its application. The radar requires high-resolution, so the applied frequency is 1 GHz wide. The filter is one of the devices used to ensure only a predetermined frequency is received by the radar system. This device must have a wide operating bandwidth to meet the specification of the radar. In this paper, a band pass filter (BPF) is proposed. It is designed and fabricated on RO4003C substrate using the substrate integrated waveguide (SIW) technique, results in a wide bandwidth at the K-band frequency that centered at 24 GHz. Besides the bandwidth analysis, the analysis of the insertion loss, the return loss, and the dimension are also reported. The simulated results of the bandpass filter are: VSWR of 1.0308, a return loss of -36.9344 dB, and an insertion loss of -0.6695 dB. The measurement results show that the design obtains a VSWR of 2.067, a return loss of -8.136 dB, and an insertion loss of -4.316  dB. While, it is obtained that the bandwidth is reduced by about 50% compared with the simulation. The result differences between simulation and measurement are mainly due to the imperfect fabrication process.

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