Millimeter Wave Solid State Devices

2000 ◽  
Vol 631 ◽  
Author(s):  
Steven A. Rosenau ◽  
Cheng Liang ◽  
Weikang Zhang ◽  
Bihe Deng ◽  
Weiying Li ◽  
...  
Keyword(s):  
Solid State ◽  
Millimeter Wave ◽  
Transmission Lines ◽  
High Speed ◽  
Beam Steering ◽  
Phase Shifters ◽  
Frequency Multiplier ◽  
Mems Switches ◽  
Solid State Devices ◽  
True Time

ABSTRACTExamples of novel solid state devices are presented, together with descriptions of their applicability to the diagnosis of laboratory, processing and fusion plasmas. GaAs varactor diodes can be arranged in large monolithic grid arrays, forming millimeter wave frequency multiplier based sources and high speed switches, or embedded in transmission lines to provide a true time delay for phased antenna array beam steering. Micro-electromechanical systems (MEMS) switches are exciting new devices with numerous applications, including low loss millimeter wave switches, phase shifters and mechanically tunable structures.

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 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.

scholarly journals Recent Trends and Advances of Silicon-Based Integrated Microwave Photonics

Photonics ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 13 ◽  
Author(s):  
Reza Maram ◽  
Saket Kaushal ◽  
José Azaña ◽  
Lawrence Chen
Keyword(s):  
High Speed ◽  
Beam Steering ◽  
Microwave Photonics ◽  
Frequency Measurement ◽  
Photonic Devices ◽  
Waveform Generation ◽  
Microwave Engineering ◽  
True Time ◽  
Arbitrary Waveform ◽  
Silicon Based

Multitude applications of photonic devices and technologies for the generation and manipulation of arbitrary and random microwave waveforms, at unprecedented processing speeds, have been proposed in the literature over the past three decades. This class of photonic applications for microwave engineering is known as microwave photonics (MWP). The vast capabilities of MWP have allowed the realization of key functionalities which are either highly complex or simply not possible in the microwave domain alone. Recently, this growing field has adopted the integrated photonics technologies to develop microwave photonic systems with enhanced robustness as well as with a significant reduction of size, cost, weight, and power consumption. In particular, silicon photonics technology is of great interest for this aim as it offers outstanding possibilities for integration of highly-complex active and passive photonic devices, permitting monolithic integration of MWP with high-speed silicon electronics. In this article, we present a review of recent work on MWP functions developed on the silicon platform. We particularly focus on newly reported designs for signal modulation, arbitrary waveform generation, filtering, true-time delay, phase shifting, beam steering, and frequency measurement.

True Time Delay Millimeter Wave Beam Steering with Integrated Optical Beamforming Network

2019 ◽  
Author(s):  
Yuan Liu ◽  
Brandon Isaac ◽  
Jean Kalkavage ◽  
Eric Adles ◽  
Thomas Clark ◽  
...  
Keyword(s):  
Time Delay ◽  
Millimeter Wave ◽  
Wave Beam ◽  
Beam Steering ◽  
True Time Delay ◽  
Integrated Optical ◽  
True Time

scholarly journals Microwave Liquid Crystal Enabling Technology for Electronically Steerable Antennas in SATCOM and 5G Millimeter-Wave Systems

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 514 ◽  
Author(s):  
Rolf Jakoby ◽  
Alexander Gaebler ◽  
Christian Weickhmann
Keyword(s):  
Liquid Crystal ◽  
Phase Shift ◽  
Millimeter Wave ◽  
Phase Shifter ◽  
Beam Steering ◽  
Phase Shifters ◽  
Worst Case ◽  
Differential Phase Shift ◽  
Digital Architecture ◽  
Differential Phase

Future satellite platforms and 5G millimeter wave systems require Electronically Steerable Antennas (ESAs), which can be enabled by Microwave Liquid Crystal (MLC) technology. This paper reviews some fundamentals and the progress of microwave LCs concerning its performance metric, and it also reviews the MLC technology to deploy phase shifters in different topologies, starting from well-known toward innovative concepts with the newest results. Two of these phase shifter topologies are dedicated for implementation in array antennas: (1) wideband, high-performance metallic waveguide phase shifters to plug into a waveguide horn array for a relay satellite in geostationary orbit to track low Earth orbit satellites with maximum phase change rates of 5.1°/s to 45.4°/s, depending on the applied voltages, and (2) low-profile planar delay-line phase shifter stacks with very thin integrated MLC varactors for fast tuning, which are assembled into a multi-stack, flat-panel, beam-steering phased array, being able to scan the beam from −60° to +60° in about 10 ms. The loaded-line phase shifters have an insertion loss of about 3 dB at 30 GHz for a 400° differential phase shift and a figure-of-merit (FoM) > 120°/dB over a bandwidth of about 2.5 GHz. The critical switch-off response time to change the orientation of the microwave LCs from parallel to perpendicular with respect to the RF field (worst case), which corresponds to the time for 90 to 10% decay in the differential phase shift, is in the range of 30 ms for a LC layer height of about 4 µm. These MLC phase shifter stacks are fabricated in a standard Liquid Crystal Display (LCD) process for manufacturing low-cost large-scale ESAs, featuring single- and multiple-beam steering with very low power consumption, high linearity, and high power-handling capability. With a modular concept and hybrid analog/digital architecture, these smart antennas are flexible in size to meet the specific requirements for operating in satellite ground and user terminals, but also in 5G mm-wave systems.

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