Beam steering type 1:4 optical switch with polymer thermo-optic phase shifters in a silica arrayed-waveguide

2005 ◽  
Author(s):  
Kenichi Masuda ◽  
Atsushi Tate ◽  
Mariko Ishida ◽  
Takanori Suzuki ◽  
Hiroyuki Tsuda
Keyword(s):  
Optical Switch ◽  
Beam Steering ◽  
Phase Shifters ◽  
Arrayed Waveguide

A polymeric optical switch array based on arrayed waveguide grating structure

2007 ◽  
Vol 279 (1) ◽  
pp. 79-82 ◽  
Author(s):  
Guohua Hu ◽  
Yiping Cui ◽  
Binfeng Yun ◽  
Changgui Lu ◽  
Zhuyuan Wang
Keyword(s):  
Optical Switch ◽  
Arrayed Waveguide Grating ◽  
Waveguide Grating ◽  
Grating Structure ◽  
Arrayed Waveguide

scholarly journals Microwave Liquid Crystal Technology

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 355 ◽  
Author(s):  
Holger Maune ◽  
Matthias Jost ◽  
Roland Reese ◽  
Ersin Polat ◽  
Matthias Nickel ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Millimeter Wave ◽  
Antenna Arrays ◽  
High Performance ◽  
Beam Steering ◽  
Phase Shifters ◽  
Dielectric Waveguides ◽  
Microwave Components ◽  
Recent Developments ◽  
Rectangular Waveguides

Tunable Liquid Crystal (LC)-based microwave components are of increasing interest in academia and industry. Based on these components, numerous applications can be targeted such as tunable microwave filters and beam-steering antenna systems. With the commercialization of first LC-steered antennas for Ku-band e.g., by Kymeta and Alcan Systems, LC-based microwave components left early research stages behind. With the introduction of terrestrial 5G communications systems, moving to millimeter-wave communication, these systems can benefit from the unique properties of LC in terms of material quality. In this paper, we show recent developments in millimeter wave phase shifters for antenna arrays. The limits of classical high-performance metallic rectangular waveguides are clearly identified. A new implementation with dielectric waveguides is presented and compared to classic approaches.

MEMS-Enabled Smart Beam-Steering Antennas

2014 ◽  
pp. 183-203
Author(s):  
Hadi Mirzajani ◽  
Habib Badri Ghavifekr ◽  
Esmaeil Najafi Aghdam
Keyword(s):  
Microelectromechanical Systems ◽  
Rf Mems ◽  
Beam Steering ◽  
Smart Antennas ◽  
Phase Shifters ◽  
Rapid Rate ◽  
Mems Devices ◽  
Batch Fabrication ◽  
Mems Technology ◽  
Smart Beam

In recent years, Microelectromechanical Systems (MEMS) technology has seen a rapid rate of evolution because of its great potential for advancing new products in a broad range of applications. The RF and microwave devices and components fabricated by this technology offer unsurpassed performance such as near-zero power consumption, high linearity, and cost effectiveness by batch fabrication in respect to their conventional counterparts. This chapter aims to give an in-depth overview of the most recently published methods of designing MEMS-based smart antennas. Before embarking into the different techniques of beam steering, the concept of smart antennas is introduced. Then, some fundamental concepts of MEMS technology such as micromachining technologies (bulk and surface micromachining) are briefly discussed. After that, a number of RF MEMS devices such as switches and phase shifters that have applications in beam steering antennas are introduced and their operating principals are completely explained. Finally, various configurations of MEMS-enabled beam steering antennas are discussed in detail.

Design of arrayed-waveguide optical switch employing window function for crosstalk reduction

2019 ◽  
Vol 58 (SJ) ◽  
pp. SJJB03
Author(s):  
Shuhei Shimada ◽  
Toshio Watanabe ◽  
Tsutomu Nagayama ◽  
Seiji Fukushima
Keyword(s):  
Optical Switch ◽  
Window Function ◽  
Crosstalk Reduction ◽  
Arrayed Waveguide

scholarly journals RF-MEMS switches with AlN dielectric and their applications

2011 ◽  
Vol 3 (5) ◽  
pp. 509-520 ◽  
Author(s):  
Montserrat Fernández-Bolaños Badía ◽  
Pierre Nicole ◽  
Adrian Mihai Ionescu
Keyword(s):  
Transmission Lines ◽  
Rf Mems ◽  
Beam Steering ◽  
Phase Shifters ◽  
Center Frequency ◽  
Mems Switches ◽  
Rf Mems Switches ◽  
Mems Technology ◽  
Bandwidth Tuning ◽  
Rf Performance

This paper reports on the potential of RF-MEMS technology based on aluminum nitride capacitive dielectric and nickel-suspended membranes to provide RF circuit functions in reconfigurable front-end radios. The RF performance of capacitive switches, distributed MEMS transmission lines (DMTLs) phase shifters for beam steering and tunable filters, including center frequency and bandwidth tuning of bandpass and band-stop filters are presented. Detailed characterization based on S-parameter data demonstrates very promising figures of merit of all fabricated demonstrators from 5 to 40 GHz.

scholarly journals Grating Lobe-Free Beam Steering through Optical Phase Array Using Phase-Compensated Two Index-Mismatched Silicon Wires-Based Emitters

2020 ◽  
Vol 10 (4) ◽  
pp. 1225
Author(s):  
Rong-An Zhang ◽  
Ting-Sheng Lin ◽  
Wai-Ting Liu ◽  
Shih-Hsiang Hsu ◽  
Che-Chang Chang
Keyword(s):  
Phase Shifter ◽  
Beam Steering ◽  
Thermal Control ◽  
Phase Shifters ◽  
Phase Array ◽  
Optical Phase ◽  
Grating Lobe ◽  
Half Wavelength ◽  
Beam Formation ◽  
Free Beam

The beam formation can be treated as the diffraction pattern. A 1-D light detection and ranging beam steering could be derived through a phase shifter array using Rayleigh–Sommerfeld Diffraction, which is then utilized to demonstrate grating lobe-free beam steering from the optical phase array emitter with half-wavelength pitches. The half-wavelength pitch cannot demonstrate beam formation without any evanescent coupling blocking between emitters. Here, two index-mismatched silicon wires in the emitter array are proposed by the optical phase compensation through waveguide width adjustment, to avoid the complex and addressable thermal control on the phase shifters. Moreover, the same output optical waveguide mode needs to be further considered to demonstrate the grating lobe-free beam steering. In order to get the adiabatic connection between two different pitches between the phase shifter and emitter, an optical path equalization will also be applied.

30 GHz Electronically Steerable Antennas Using BaxSr1−xTiO3-Based Room-Temperature Phase Shifters

1999 ◽  
Vol 603 ◽  
Author(s):  
C. M. Carlson ◽  
T. V. Rivkin ◽  
P. A. Parilla ◽  
J. D. Perkins ◽  
D. S. Ginley ◽  
...  
Keyword(s):  
Ferroelectric Phase ◽  
Beam Steering ◽  
Composite Films ◽  
Satellite Communications ◽  
Side Lobe ◽  
Phase Shifters ◽  
Temperature Phase ◽  
Central Lobe ◽  
Power Handling Capability ◽  
Half Power

AbstractWe report the performance of 16-element phased array antennas operating at 30 GHz and ambient temperature. These antennas use BaxSr1−xTiO3(BST)-based phase shifters to produce the beam steering. Ferroelectric phase shifters offer advantages over current semiconductor and ferrite devices including faster switching speeds and lower costs. Also, ferroelectric phase shifters offer higher power handling capability than semiconductor devices and also have high radiation resistance. We made phase shifters from laser-ablated epitaxial BST films as well as from polycrystalline BST-oxide composite films. Although neither the devices nor the materials themselves are fully optimized, phase shifters have shown > 360° of phase shift with < 350 V DC bias (E < 9 V/µm) and ∼8 dB insertion loss. With ferroelectric phase shifters incorporated, antennas show radiation patterns with central-lobe half-power widths of ∼13° and side lobe intensities down by more than 10 dB. Using the phase shifters, the central lobe can be shifted, or “steered,” by ±18° in either direction. These results demonstrate a first step toward a prototype steerable antenna for 20–30 GHz satellite communications as well as other applications.

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