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Millimeter Wave Phased Arrays For Communication And Their System Level Impairments And Advantages
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Book Synopsis Millimeter-wave Phased-arrays for Communication and Their System-Level Impairments and Advantages by : Bhaskara Rao Rupakula
Download or read book Millimeter-wave Phased-arrays for Communication and Their System-Level Impairments and Advantages written by Bhaskara Rao Rupakula and published by . This book was released on 2019 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents millimeter-wave transmit/receive phased-arrays at 60 GHz, which are used to demonstrate long-range and high data-rate communication links. A 32-element one-dimensional (1-D) phased-array is built with 2$\times$2 beamformer chips flipped on a low-cost printed circuit board. Series-fed microstrip antennas are used, which limits the bandwidth to around 2 GHz at 64 GHz center frequency. The phased-array scans only in the azimuth plane with a 3$^o$ beamwidth and has a wide beam of 12$^o$ in elevation. The phased-array’s high effective isotropic radiated power (EIRP) of around 42 dBm and low noise figure of 6.5 dB enable long-range communication at 500 Mbps over 800 m. A two-dimensional (2-D) scanning phased-array is also built using the same beamformer chips on a more complex multilayer board. The 2-D phased-array has an EIRP of 45 dBm in saturation and scans up to +/- 15$^o$ in the elevation plane and +/-50$^o$ in the azimuth. Stacked microstrip antennas are used, enabling a wide bandwidth of $\sim$8 GHz for the phased-array. Data-rates of up to 30 Gbps are achieved with 64-QAM modulation using the full bandwidth of the phased-array. An analysis of intermodulation effects in receive-mode phased-arrays is presented and verified through experimental results from a Ka-band 5G phased-array. The intermodulation products are shown to peak at scan angles which do not correspond to the interferer directions. Experimental evidence is presented to show that the adjacent channel power ratio (ACPR) of transmit phased-arrays improves with larger number of elements at a given backoff from the compression point. This implies better transmit efficiency in larger phased-arrays. Finally, techniques are presented for reducing the number of phase-shifters in a 2-D phased-array while maintaining a limited scan range in the vertical and horizontal planes. It is shown that the number of phase-shifters can be reduced by 75\%, while maintaining a scan range of +/-15$^o$ in the elevation and +/-40$^o$ in the azimuth.
Book Synopsis Systems Engineering of Phased Arrays by : Rick Sturdivant
Download or read book Systems Engineering of Phased Arrays written by Rick Sturdivant and published by Artech House. This book was released on 2018-11-30 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phased arrays, while traditionally used in radar systems, are now being used or proposed for use in internet of things (IoT) networks, high-speed back haul communication, terabit-per-second satellite systems, 5G mobile networks, and mobile phones. This book considers systems engineering of phased arrays and addresses not only radar, but also these modern applications. It presents a system-level perspective and approach that is essential for the successful development of modern phased arrays. Using practical examples, this book helps solve problems often encountered by technical professionals. Thermal management challenges, antenna element design issues, and architectures solutions are explored as well as the benefits and challenges of digital beam forming. This book provides the information required to train engineers to design and develop phased arrays and contains questions at the end of each chapter that professors will find useful for instruction.
Book Synopsis Millimeter-wave Wafer-Scale Phased Arrays and Wireless Communication Circuits and Systems in SiGe and CMOS Technology by : Woorim Shin
Download or read book Millimeter-wave Wafer-Scale Phased Arrays and Wireless Communication Circuits and Systems in SiGe and CMOS Technology written by Woorim Shin and published by . This book was released on 2013 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a W-band wafer-scale phased array transmitter with high efficiency on-chip antennas. The 4x4 phased array is based on an RF beamforming architecture with an equiphase distribution network and 2-bit phase shifters placed in every element. The differential on-chip antennas are implemented using a 100 um thick quartz superstrate and have an efficiency of ~45% at 110 GHz. The use of electromagnetically coupled antenna leads to wafer-scale phased array concept with simple integration method. The phased array transmitter is implemented in 0.18 [mu]m SiGe BiCMOS process, and the measurement shows an array gain of 26.5 dB, pattern directivity of 17.0 dBi, maximum EIRP of 23-25 dBm at 108-114 GHz. The direct pattern measurement from the phased array transmitter shows beam steering capabilities up to plus/minus ±30° in two orthogonal directions. This is the first demonstration of wafer-scale phased array in silicon technology. Millimeter-wave circuit components in 45nm SOI CMOS technology are also presented. Transmission-line based D-band common-source and cascode amplifers are designed with the peak gain of 8.7 dB at 147 GHz and 6.1 dB at 171 GHz, respectively. The experimental characterization of the technology shows that on-chip passive elements has low-quality factor, and it can offset performance advantage of the active devices. A 60 GHz active phased shifter with quadrature all-pass filter shows -4 dB insertion gain with
Book Synopsis Dual-Band and Wideband Millimeter-Wave Phased Arrays for 5G Communication Systems by : Shufan Wang
Download or read book Dual-Band and Wideband Millimeter-Wave Phased Arrays for 5G Communication Systems written by Shufan Wang and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demands of multi-standard operation have risen in millimeter-wave 5G phased arrays, in order to achieve more band coverage, reduce fabrication and deployment costs and realize inter-band carrier aggregation. This dissertation investigates dual-band and wideband design approaches to realize multi-standard phased array systems. In the dual-band approach, a 32-element dual-band, dual-beam phased array is designed by integrating dual-band patch antennas with commercial narrowband beamformers. Another design introduces an 8-element dual-band, dual-polarized, dual-beam phased array targeted at compact system applications. Both designs achieve 26-29 GHz and 37-41 GHz operation. In the wideband phased array approach, a novel stacked wideband dipole antenna is developed and integrated with a wideband SiGe Tx/Rx beamformers to achieve operation of 23-46 GHz. A single-polarized 64-element array and a dual-polarized 8-element array are then demonstrated with state-of-the-art performance. The 64-element array achieves a maximum EIRP of 50 dBm at P1dB operation, and 8-element dual-pol. array achieves 29 dBm. Both arrays demonstrate less than 4% EVM when transmitting 64-QAM 5G OFDM signal with 6-8 dB backoff from P1dB.
Book Synopsis Enabling Millimeter-wave Circuit Techniques for High Data Rate Communication by : Najme Ebrahimiseraji
Download or read book Enabling Millimeter-wave Circuit Techniques for High Data Rate Communication written by Najme Ebrahimiseraji and published by . This book was released on 2017 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation has been mainly focused on reconfigurable mm-wave integrated circuits for next generation wireless communication systems (namely, 5G). One of the major approaches to making 5G a reality is the use of high-frequency signals in the millimeter-wave (mm-wave) frequency band to facilitate access to more bandwidth. This can deliver faster and more reliable data to more users. This dissertation contributes to making wideband, bidirectional, and scalable RFICs for high data rate point-to-point communications over large distances in mm-wave bands, particularly the E-band (71-76 GHz, 81-86 GHz). The E-band is a licensed band in the US, with 10 GHz of bandwidth allocated to low-cost, high-capacity, and point-to-point communication. For backhaul base-stations or air-to-ground communication, a scalable and large-element phased array is desired to acquire the appropriate isotropic radiated power and signal to noise ratio. Additionally, bidirectional operation supporting transmit (TX) and receive (RX) in a single aperture is desirable to minimize the area and save power. This dissertation has focused on new architectures for scalable, bidirectional, and wideband phased arrays using IBM\textquoteright s fastest SiGe technology, 90 nm. In this dissertation, the first E-band scalable phased-array transceiver is proposed based on coupled oscillator architecture. Coupled oscillator phased arrays have the advantage of low power and low complexity, resulting in an architecture that easily scales to the number of elements as multiple die can be aggregated to form a larger array through local oscillator (LO) power distribution and intermediate frequency (IF) power combining. However, silicon processes introduce undesirable parasitics and manufacturing tolerances to the transistor and passive devices. When multiple oscillators are present in a single die, the oscillators couple through the substrate. The substrate coupling introduces additional parasitic coupling paths between oscillators; this causes pulling and, consequently, amplitude and phase variation between the oscillators. In addition, the parasitics from the injection node to the substrate deviate the ILO performance from its ideal behavior. Conventional analysis of the amplitude and phase noise typically ignores the effect of the silicon substrate parasitic effects. This dissertation investigated the nonlinear dynamics of an injection-locked oscillator (ILO), where the effective circuit parameters of ILO performance were observed. More specifically, new amplitude and phase equations are derived that took into account the transistor\textquoteright s device parasitics and silicon substrate\textquoteright s parasitic coupling effects, including the transistor injection node parasitic capacitance ($C_{P}$), substrate parasitic conductive ($R_{sub}$) and dielectric ($C_{j}$) features. The derived models are compared with both the simulation and measurement results. The proposed 2x2 transceiver phased array block diagram described in this dissertation employs 4 injection-locked oscillators (ILOs) operating at a lower frequency range (in this case, 1/4 of the desired LO frequency), followed by a frequency quadrupler, to form a beam in transmit and receive modes. The bidirectional front-end is designed to operate at E-band within 3-dB bandwidth. Since the ILO-based phase shifting is technically challenging at millimeter-wave bands due to the parasitics of the injection circuitry and the oscillator phase noise trade-offs, the high-frequency limitations of the ILO phase shifter is considered and wide locking range and a less parasitic sensitive solution for current injection using folded-cascode architecture is proposed. The proposed ILO-based phase array architecture result in low phase noise and low channel to channel isolation supporting 6 Gb/s data rate at 256 QAM modulation. The conventional architectures of the E-band transceiver require a wide tuning range, around 10 GHz, for the LO signal and wide-bandwidth IF blocks. The wide-bandwidth requirement of LO and IF frequency for mm-waves increases the power consumption and complexity of the system. This dissertation proposes a novel architecture, named the \textquotedblleft Image-selection\textquotedblright{} E-band phased array. This new architecture makes the upper-band (81-86 GHz) and the lower-band (71-76 GHz) of the E-band spectrum images of each other in comparison to the LO signal, which is located at the center frequency (78.5 GHz). Therefore, an image rejection architecture is desired to select the wanted band while rejecting the other. The significant advantage of this architecture is that it only requires an LO with the quadrature phases within a tuning range lower than 1 GHz . This will relax the system design trade-offs to the circuit impairments. For bidirectional operation purpose and preventing use of quadrature generation circuitry at direct intermediate frequency (IF) or radio frequency (RF) signal paths, sliding-IF weaver architecture mixers are employed with the phase inverter in the divider path to select the upper or lower band. This architecture leads in to a flat conversion gain over the bandwidth and low amplitude and phase imbalance. The achieved QAM modulation data rate from this technique is the state of art,\lyxdeleted{najmebi}{Mon May 29 19:43:48 2017}{ } 9Gb/s (64 QAM) with less than 5\% EVM and 12 Gb/s (16 QAM) with less than 10\% EVM.
Book Synopsis Array Architectures and Physical Layer Design for Millimeter-Wave Communications Beyond 5G by : Han Yan
Download or read book Array Architectures and Physical Layer Design for Millimeter-Wave Communications Beyond 5G written by Han Yan and published by . This book was released on 2020 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever increasing demands in mobile data rates have resulted in exploration of millimeter-wave (mmW) frequencies for the next generation (5G) wireless networks. Communications at mmW frequencies is presented with two keys challenges. Firstly, high propagation loss requires base stations (BSs) and user equipment (UEs) to use a large number of antennas and narrow beams to close the link with sufficient received signal power. Consequently, communications using narrow beams create a new challenge in channel estimation and link establishment based on fine angular probing. Current mmW system use analog phased arrays that can probe only one angle at the time which results in high latency during link establishment and channel tracking. It is desirable to design low latency beam training by exploring both physical layer designs and array architectures that could replace current 5G approaches and pave the way to the communications for frequency bands in higher mmW band and sub-THz region where larger antenna arrays and communications bandwidth can be exploited. To this end, we propose a novel signal processing techniques exploiting unique properties of mmW channel, and show both theoretically, in simulation and experiments its advantages over conventional approaches. Secondly, we explore different array architecture design and analyze their trade-offs between spectral efficiency and power consumption and area. For comprehensive comparison, we have developed a methodology for optimal design of system parameters for different array architecture candidates based on the spectral efficiency target, and use these parameters to estimate the array area and power consumption based on the circuits reported in the literature. We show that the hybrid analog and digital architectures have severe scalability concerns in radio frequency signal distribution with increased array size and spatial multiplexing levels, while the fully-digital array architectures have the best performance and power/area trade-offs. The developed approaches are based on a cross-disciplinary research that combines innovation in model based signal processing, machine learning, and radio hardware. This work is the first to apply compressive sensing (CS), a signal processing tool that exploits sparsity of mmW channel model, to accelerate beam training of mmW cellular system. The algorithm is designed to address practical issues including the requirement of cell discovery and synchronization that involves estimation of angular channel together with carrier frequency offset and timing offsets. We have analyzed the algorithm performance in the 5G compliant simulation and showed that an order of magnitude saving is achieved in initial access latency for the desired channel estimation accuracy. Moreover, we are the first to develop and implement a neural network assisted compressive beam alignment to deal with hardware impairments in mmW radios. We have used 60GHz mmW testbed to perform experiments and show that neural networks approach enhances alignment rate compared to CS. To further accelerate beam training, we proposed a novel frequency selective probing beams using the true-time-delay (TTD) analog array architecture. Our approach utilizes different subcarriers to scan different directions, and achieves a single-shot beam alignment, the fastest approach reported to date. Our comprehensive analysis of different array architectures and exploration of emerging architectures enabled us to develop an order of magnitude faster and energy efficient approaches for initial access and channel estimation in mmW systems.
Book Synopsis Optimized Systems and Calibration of Millimeter-Wave Phased-Arrays for 5G, SATCOM and Radar Applications by : Zhe Zhang
Download or read book Optimized Systems and Calibration of Millimeter-Wave Phased-Arrays for 5G, SATCOM and Radar Applications written by Zhe Zhang and published by . This book was released on 2021 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phased array technologies has been in development for many decades but primarily in defense industry with large complicated systems and excessively high cost. With the recent advances in silicon chips and printed-circuit board (PCB) manufacturing, planar phased arrays can be built on a PCB in a compact form with drastically lower cost. The new 5G communication standards also utilize millimeter wave bands that require phased arrays with high effective isotropic radiated power (EIRP) and beam steering capabilities. The 5G systems, with the fast growing industry of satellite communications on-the-move, and millimeter wave automotive radars used for self-driving technologies, contribute to a giant market in need of a large amount of low cost phased arrays. This dissertation focuses on such commercial-use phased arrays, studies their artifacts and how to eliminate them, provides solutions to optimized phased-array systems, and proposes calibration methods essential for their performance. First, it presents the intersymbol interference (ISI) caused by the phased array when it is scanned with a simple effective equalization scheme, and then, it presents a TX/RX phased-array system with a reduced number of randomly distributed elements that is optimized for radar applications. This dissertation also presents a new method for phased array calibration based on 2x2 sub-arrays that is more robust across different scan angles and yields better performance while reducing the measurement time. Finally, a method to measure the error vector magnitude (EVM) of the phased array in the near-field is presented, which can be used to verify the calibration and performance of phased arrays in communication systems when they are deployed in the field.
Book Synopsis Millimeter-wave Phased Arrays in Silicon by : Arun Sridhar Natarajan
Download or read book Millimeter-wave Phased Arrays in Silicon written by Arun Sridhar Natarajan and published by . This book was released on 2007 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Full-duplex Millimeter Wave Communication Systems by : Ian Parker Roberts
Download or read book Full-duplex Millimeter Wave Communication Systems written by Ian Parker Roberts and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation is focused on studying, characterizing, and developing new solutions for full-duplex millimeter wave (mmWave) communication systems. Translating existing full-duplex solutions—which are largely for systems operating at lower carrier frequencies—to mmWave systems is not practically viable nor is it necessarily desirable. Instead, I propose several novel solutions for full-duplex mmWave systems, all of which harness beamforming with dense antenna arrays to cancel self-interference to levels near or even below the noise floor—unlocking the long-sought ability to simultaneously transmit and receive over the same frequency spectrum. Two trademarks of my proposed techniques are that they (i) account for a wide variety of key practical constraints and (ii) are informed by a campaign in which I collected and analyzed nearly 20 million measurements of self-interference using 28 GHz phased arrays. Numerical simulation and experimental evaluation are used to illustrate the effectiveness of the proposed techniques, validating them as enablers of full-duplex mmWave systems. Based on the aforementioned measurements, this dissertation also extensively characterizes mmWave self-interference through statistical analysis and spatial modeling, both of which are the first of their kind. Together comprising this dissertation, the characterization of self-interference and the proposed solutions serve as strides toward transforming real-world mmWave communication systems by upgrading them with full-duplex capability
Book Synopsis Single Input Single Output Digital Pre-Distortion at Millimeter Wave Frequencies for Phased Arrays by : Ahmed BEN AYED
Download or read book Single Input Single Output Digital Pre-Distortion at Millimeter Wave Frequencies for Phased Arrays written by Ahmed BEN AYED and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The limiting fact that is impeding the increase in data rate in the current generation of wireless communication is the limited available spectrum in the sub-6 GHz bands. This has motivated the shift to higher frequencies such as millimeter waves (mm-wave) and terahertz frequencies where modulation bandwidth of several hundreds of MHz can be utilized to increase the communication link capacity. The deployment of high data rate mm-wave base stations will highly depend on the maximum achievable equivalent isotropic radiated power (EIRP) and on the ability to generate reliable and error free wideband signals. High EIRP and high efficiency operation can be achieved by using active phased arrays operated deep into the power amplifiers (PAs) nonlinear region. In this work, a low power and low complexity compensation schemes to mitigate the impairments exhibited by phase arrays driven with wideband signals and high efficient nonlinear PAs at mm-wave frequencies are proposed. Digital pre-distortion (DPD) techniques can provide an attractive solution to linearize high efficiency and high EIRP nonlinear phased arrays at mm-wave frequencies. However, the viable deployment of DPD solutions call for the reduction in the power consumption of the transmitter observation receiver (TOR) feedback path required to train the DPD function. To that end, a low power DPD scheme for linearizing mm-wave hybrid beamforming antenna systems is presented. The proposed DPD scheme exploits the modularity of hybrid beamforming systems. During the training phase, the constituent sub-arrays, are categorized, into (i) the main sub-array that exhibits non-linear distortion and is to be linearized, and (ii) the auxiliary sub-arrays that operate in the backoff region to avoid nonlinearity. To produce the error signal necessary to train the DPD function (and compensate for the distortions exhibited by the main sub-array), the signals transmitted by the main and auxiliary sub-arrays are combined. This error signal is captured using a TOR with low dynamic range and is digitized using a low-bit resolution analog-to-digital converter (ADC). Proof-of-concept validation experiments are conducted by applying the proposed DPD system to linearize an off-the-shelf hybrid-beamforming array comprised of four 64-element sub-arrays, operating at 28 GHz and driven with up to 800 MHz orthogonal frequency-division multiplexing (OFDM) modulated signals. Using the proposed DPD scheme, a TOR with a 4-bit ADC was sufficient to improve the adjacent channel power ratio (ACPR) by 10 dB and the error vector magnitude (EVM) improved from 5.8% to 1.6%. These results are similar to those obtained using a TOR with 16-bit ADCs. Reducing the complexity of the DPD scheme for phased arrays is also of primordial importance to the successful deployment of DPD solutions. For instance, the DPD function needs to be desensitize to the load modulation effects exhibited by large antenna systems and be able to linearize phased arrays at different steering angles. To address the challenges associated with the load modulation for phased arrays, we propose a generalized SISO DPD scheme as solution to minimize the EVM variation at different steering angles. The measurement results of the proposed scheme, using a 400 MHz OFDM signal with subcarriers modulated using 256 QAM and on a commercial 64-elements beamforming array, was able to maintain the EVM below 2% across the full steering range. This solution, however, failed to maintain the ACPR below -45 dBc. The effect of tapering on the load modulation and the array nonlinearity is also analysed. The measurement results using different tapers are used to validate the theory and the simulation results. Using tapering, the ACPR and EVM variation before and after DPD were minimized versus steering angles. For instance, using taper setting 2, the ACPR and EVM are maintained below -46 dBc and 1% from -38° to 45° and below -42.3 dBc and 1.8% from -45° to 45° respectively. Better results are measured when tapering is used in conjunction with the proposed generalized DPD scheme. In that case, the ACPR is improved from -35.5 to at worst -46.4 dBc and at best -50 dBc and the EVM is improved from at worst 4.5% to at worst 1.2% and at best 0.85%. The EVM is also maintained below 0.95% from -39° to 45°.
Book Synopsis Integrated Microwave and Millimeter-wave Phased-array Designs in Silicon Technologies by : Kwang-Jin Koh
Download or read book Integrated Microwave and Millimeter-wave Phased-array Designs in Silicon Technologies written by Kwang-Jin Koh and published by . This book was released on 2008 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research focuses on the design and analysis of on-chip phased-array receivers and transmitters in silicon technologies. Passive phase shifters have been widely used in conventional discrete implementations of phased-arrays which are based on transmit/receive modules in III-V technologies. However their large volume and high loss impose several challenging issues for on-chip integration. To leverage system optimizations of on-chip phased-arrays, active phase shifter architecture is primarily investigated in this dissertation. The active phase shifter utilizes a quadrature signal interpolation where the I/Q signals are added with appropriate amplitude and polarity to synthesize the required phase. The quadrature signal generator is a key element for accurate multi-bit phase states in the active phase shifter. To generate lossless wideband quadrature signals, a novel I/Q signal generator based on second-order L-C series resonance is developed. Active phase shifters with 4-bit and 5-bit control are then designed in 0.13-um and 0.18-um CMOS technologies and tested successfully for 6-26 GHz phased-arrays applications, featuring the smallest chip size ever reported at these frequencies with similar phase resolutions. After successful demonstration of the active phase shifters, an eight-element phased-array receiver is developed in 0.18-um SiGe BiCMOS technology for X- and Ku-band satellite communications. The phased-array receiver adopts corporate-feed architecture implemented with active signal combiners. The phased-array receiver is rigorously characterized including channel-to-channel mismatches and signal coupling errors from different channels. The on-chip phased-array designs are then extended to millimeter-wave frequencies. A four-element phased-array receiver and a sixteen-element phased-array transmitter are designed using the SiGe BiCMOS technology and tested successfully for Q-band applications. Wilkinson couplers are compactly integrated for linear coherent signal combining in the Q-band phased-array receiver. Also in the Q-band transmitter array, passive Tee-junction power dividers are integrated as a linear signal feed network. The power divider is based on a coaxial-type shielded transmission line utilizing three-dimensional metal stack, which leads to a compact corporate-feed network suitable for large on-chip arrays. The sixteen-element phased-array transmitter marks the highest integration of phased-array elements known to-date, proving a good scalability to a large array of the proposed phased-array architecture. Also, each phased-array design integrates all digital control units and presents the first demonstration of on-chip silicon phased-array at the corresponding design frequency, solving one of key barriers for low-cost and complex phased-arrays.
Book Synopsis Novel Technologies and Techniques for Low-cost Phased Arrays and Scanning Antennas by : Christopher Timothy Rodenbeck
Download or read book Novel Technologies and Techniques for Low-cost Phased Arrays and Scanning Antennas written by Christopher Timothy Rodenbeck and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation introduces new technologies and techniques for low-cost phased arrays and scanning antennas. Special emphasis is placed on new approaches for low-cost millimeter-wave beam control. Several topics are covered. A novel reconfigurable grating antenna is presented for low-cost millimeter-wave beam steering. The versatility of the approach is proven by adapting the design to dual-beam and circular-polarized operation. In addition, a simple and accurate procedure is developed for analyzing these antennas. Designs are presented for low-cost microwave/millimeter-wave phased-array transceivers with extremely broad bandwidth. The target applications for these systems are mobile satellite communications and ultra-wideband radar. Monolithic PIN diodes are a useful technology, especially suited for building miniaturized control components in microwave and millimeter-wave phased arrays. This dissertation demonstrates a new strategy for extracting bias-dependent small-signal models for monolithic PIN diodes. The space solar-power satellite (SPS) is a visionary plan that involves beaming electrical power from outer space to the earth using a high-power microwave beam. Such a system must have retrodirective control so that the high-power beam always points on target. This dissertation presents a new phased-array architecture for the SPS system that could considerably reduce its overall cost and complexity. In short, this dissertation presents technologies and techniques that reduce the cost of beam steering at microwave and millimeter-wave frequencies. The results of this work should have a far-ranging impact on the future of wireless systems.
Book Synopsis Wideband Millimeter-Wave Phased Arrays and Their Calibration by : Yuan Chang
Download or read book Wideband Millimeter-Wave Phased Arrays and Their Calibration written by Yuan Chang and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technology Development for Millimeter Wave Phased Arrays by : Daniel H. Schaubert
Download or read book Technology Development for Millimeter Wave Phased Arrays written by Daniel H. Schaubert and published by . This book was released on 1987 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project investigated architectures, radiators, FET amplifiers and oscillators that could be used in monolithic millimeter wave phased arrays. These investigations contribute to an understanding of the performance of integrated phased arrays. For example, scan blindness associated with surface waves and competition with active components for limited substrate surface area lead to designs with more than one substrate. It has been shown that feed lines can couple electromagnetically to microstrip paths through apertures in an intervening ground plane, and this allows using the beat substrate for each function. Injection locked oscillators using FETs in microstrip and coplanar waveguide circuits were developed as phase controlled sources for transmitter or local oscillators.
Book Synopsis Implementations of Phased Array System and Receiver Components for the 5G Millimeter Wave System by : 陳俊年
Download or read book Implementations of Phased Array System and Receiver Components for the 5G Millimeter Wave System written by 陳俊年 and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis mmWave Massive MIMO by : Shahid Mumtaz
Download or read book mmWave Massive MIMO written by Shahid Mumtaz and published by Academic Press. This book was released on 2016-12-02 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: mmWave Massive MIMO: A Paradigm for 5G is the first book of its kind to hinge together related discussions on mmWave and Massive MIMO under the umbrella of 5G networks. New networking scenarios are identified, along with fundamental design requirements for mmWave Massive MIMO networks from an architectural and practical perspective. Working towards final deployment, this book updates the research community on the current mmWave Massive MIMO roadmap, taking into account the future emerging technologies emanating from 3GPP/IEEE. The book's editors draw on their vast experience in international research on the forefront of the mmWave Massive MIMO research arena and standardization. This book aims to talk openly about the topic, and will serve as a useful reference not only for postgraduates students to learn more on this evolving field, but also as inspiration for mobile communication researchers who want to make further innovative strides in the field to mark their legacy in the 5G arena. Contains tutorials on the basics of mmWave and Massive MIMO Identifies new 5G networking scenarios, along with design requirements from an architectural and practical perspective Details the latest updates on the evolution of the mmWave Massive MIMO roadmap, considering future emerging technologies emanating from 3GPP/IEEE Includes contributions from leading experts in the field in modeling and prototype design for mmWave Massive MIMO design Presents an ideal reference that not only helps postgraduate students learn more in this evolving field, but also inspires mobile communication researchers towards further innovation
Book Synopsis Millimeter-Wave Phased-Array Radio Front-Ends In SiGe BiCMOS Technologies by : Mohamed Elkhouly
Download or read book Millimeter-Wave Phased-Array Radio Front-Ends In SiGe BiCMOS Technologies written by Mohamed Elkhouly and published by . This book was released on 2015 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
