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Radio Frequency Communication Using Higher Order Gaussian Beams
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Book Synopsis Radio-frequency Communication Using Higher Order Gaussian Beams by : Haohan Yao
Download or read book Radio-frequency Communication Using Higher Order Gaussian Beams written by Haohan Yao and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent explosive growth in the number of wireless devices and demand for portable information content has led to the need for modern wireless systems with higher bandwidth to support faster data rates. It is necessary to move to higher frequency bands to increase the channel capacity. It is important to develop new methods to increase channel capacity for applications, including short range chip-to-chip wireless links. One approach to increasing capacity that has been explored in optics and at radio frequency (RF) is mode-division-multiplexing (MDM) of multiple orthogonal electromagnetic beams. This dissertation focuses on developing radio-frequency communication using higher order modes of Gaussian beams, specifically Hermite-Gaussian (HG) and Laguerre-Gaussian (LG). First, a physical phase plate was designed and fabricated to transform plane waves to Hermite-Gaussian beams. The phase plate is designed for an HG11 mode, working at E-band from 71 to 76 GHz. Second, an HG11 beam is formed using four inset-fed microstrip patch elements arranged with a microstrip corporate feeding network at the same frequency. The physical phase plate and the patch antenna array were both simulated using ANSYS HFSS. Radiation pattern measurements were taken on an NSI 700S-360 spherical near-field system at from 71 to 76 GHz with an Agilent vector network analyzer (VNA). Third, LG beams were generated with spiral phase plates (SPP) from 71 to 76 GHz. Then a dual-channel E-band communication link using commercial impulse radios was demonstrated with two LG beams over 2 meters range. LG OAM beams at E-band were also generated by a circular patch array and then a wireless communication link was built using the array to demonstrate twisting a wave with patches and untwisting it with a SPP. Also included is a demonstration of horn antennas manufactured by 3D printing with low cost metallic paint for X-band and Ka-band frequencies. This work advances wireless communication using advanced hardware techniques.
Book Synopsis Circular Array-Based Radio Frequency OAM Communications by : Rui Chen
Download or read book Circular Array-Based Radio Frequency OAM Communications written by Rui Chen and published by Springer Nature. This book was released on 2023-11-25 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the modeling and transmission theory of RF OAM communications. The book features the UCA-based RF point-to-point OAM communication system, the UCA-based RF point-to-multipoint OAM wireless backhaul network, the HCCL structure for long-distance OAM transmissions, and the UCA-based joint OAM RadCom scheme. For the UCA-based RF point-to-point OAM communication system, a 2-D ESPRIT-based distance and AoA estimation method is first introduced, followed by an OAM reception scheme including the hybrid mechanical and electronic beam steering with the estimated AoA and the amplitude detection with the estimated distance. The proposed RF OAM communication scheme is extended to the RF OAM-MIMO system equipped with UCCAs. For the UCA-based RF point-to-multipoint OAM wireless backhaul network, an OAM-based multi-user distance and AoA estimation method is introduced, followed by a multi-user OAM preprocessing scheme. At last, the proposed methods are extended to the downlink multi-user OAM-MIMO wireless backhaul system equipped with UCCAs. Moreover, a novel HCCL structure is introduced to realize long-distance OAM transmission. For the UCA-based joint OAM RadCom scheme, an OAM-based 3-D super-resolution position estimation and rotation velocity detection method is introduced, and then the PCRB of the OAM-based estimates and the transmission rate of the integrated system are derived and analyzed. To achieve the best performance trade-off, the transmitted integrated OAM beams is optimized by means of an exhaustive search method. Finally, this book discusses future research directions to inspire further investigation in the field of RF OAM communications from different perspectives.
Book Synopsis State-of-the-Art of High-Power Gyro-Devices - Update of Experimental Results 2023 (KIT Scientific Reports ; 7765) by : Thumm, Manfred
Download or read book State-of-the-Art of High-Power Gyro-Devices - Update of Experimental Results 2023 (KIT Scientific Reports ; 7765) written by Thumm, Manfred and published by KIT Scientific Publishing. This book was released on 2024-02-06 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents an update of the experimental achievements published in the review “State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers”, Journal of Infrared, Millimeter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) and in the KIT Scientific Report 7761 (2021), related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.
Book Synopsis Gaussian Beams and Optical Resonators by : Anatoliĭ Nikolaevich Oraevskiĭ
Download or read book Gaussian Beams and Optical Resonators written by Anatoliĭ Nikolaevich Oraevskiĭ and published by Nova Biomedical Books. This book was released on 1996 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gaussian Beams & Optical Resonators Proceedings Of The Lebedev Physics Institute [A N Oraevsky]
Book Synopsis State-of-the-Art of High-Power Gyro-Devices. Update of Experimental Results 2021. (KIT Scientific Reports ; 7761) by : Thumm, Manfred
Download or read book State-of-the-Art of High-Power Gyro-Devices. Update of Experimental Results 2021. (KIT Scientific Reports ; 7761) written by Thumm, Manfred and published by KIT Scientific Publishing. This book was released on 2021-10-28 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents an update of the experimental achievements published in the review “State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers”, Journal of Infrared, Millime-ter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Intelligent Electronics and Circuits by : Mingbo Niu
Download or read book Intelligent Electronics and Circuits written by Mingbo Niu and published by BoD – Books on Demand. This book was released on 2022-09-28 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intelligent electronics could shape future smart cities and promote initiatives on exploring brand-new integrated circuits, high-effective intelligent reconfigurable surfaces, nondestructive evaluation, terahertz (THz), ITS, 6G, medical and safety imaging, and signal filtering. This book presents mainstream principles, circuitry architectures, and a development roadmap for intelligent electronic systems. Its content ranges from theoretical basis to materials characteristics, and from featured advances to practical applications.
Book Synopsis State-of-the-Art of High Power Gyro-Devices and Free Electron Masers. Update 2015 (KIT Scientific Reports ; 7717) by : Thumm, Manfred
Download or read book State-of-the-Art of High Power Gyro-Devices and Free Electron Masers. Update 2015 (KIT Scientific Reports ; 7717) written by Thumm, Manfred and published by KIT Scientific Publishing. This book was released on 2016-08-29 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Station Systems written by and published by . This book was released on 1986 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multiscale Gaussian-beam Method for High-frequency Wave Propagation and Inverse Problems by : Chao Song
Download or read book Multiscale Gaussian-beam Method for High-frequency Wave Propagation and Inverse Problems written by Chao Song and published by . This book was released on 2018 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The existence of Gaussian beam solution to hyperbolic PDEs has been known to the pure mathematics community since sometime in the 1960s [3]. It enjoys popularity afterwards due to its ability to resolve the caustics problem and its efficiency [49, 28, 31]. In this thesis, we will focus on the extension of the multi-scale Gaussian beam method and its application to seismic wave modeling and inversion. In the first part of thesis, we discuss the application of the multi-scale Gaussian beam method to the inverse problem. A new multi-scale Gaussian beam method is introduced for carrying out true-amplitude prestack migration of acoustic waves. After applying the Born approximation, the migration process is considered as shooting two beams simultaneously from the subsurface point which we want to image. The Multi-scale Gaussian Wavepacket transform provides an efficient and accurate way for both decomposing the perturbation field and initializing Gaussian beam solution. Moreover, we can prescribe both the region of imaging and the range of dipping angles by shooting beams from a subsurface point in the region of imaging. We prove the imaging condition equation rigorously and conduct error analysis. Some numerical approximations are derived to improve the efficiency further. Numerical results in the two-dimensional space demonstrate the performance of the proposed migration algorithm. In the second part of thesis, we propose a new multiscale Gaussian beam method with reinitialization to solve the elastic wave equation in the high frequency regime with different boundary conditions. A novel multiscale transform is proposed to decompose any arbitrary vector-valued function to multiple Gaussian wavepackets with various resolution. After the step of initializing, we derive various rules corresponding to different types of reflection cases. To improve the efficiency and accuracy, we develop a new reinitialization strategy based on the stationary phase approximation method to sharpen each single beam ansatz. This is especially useful and necessary in some reflection cases. Numerical examples with various parameters demonstrate the correctness and robustness of the whole method. There are two boundary conditions considered here, the periodic and the Dirichlet boundary condition. In the end, we show that the convergence rate of the proposed multiscale Gaussian beam method follows the convergence rate of the classical Gaussian beam solution.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1965 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal of Current Laser Abstracts by :
Download or read book Journal of Current Laser Abstracts written by and published by . This book was released on 1973 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Frequency Analysis of Gaussian Beam Scattering by a Parabolic Surface Containing an Edge by : Hristos T. Anastassiu
Download or read book High Frequency Analysis of Gaussian Beam Scattering by a Parabolic Surface Containing an Edge written by Hristos T. Anastassiu and published by . This book was released on 1992 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book VCSELs written by Rainer Michalzik and published by Springer. This book was released on 2012-10-16 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: The huge progress which has been achieved in the field is covered here, in the first comprehensive monograph on vertical-cavity surface-emitting lasers (VCSELs) since eight years. Apart from chapters reviewing the research field and the laser fundamentals, there are comprehensive updates on red and blue emitting VCSELs, telecommunication VCSELs, optical transceivers, and parallel-optical links for computer interconnects. Entirely new contributions are made to the fields of vectorial three-dimensional optical modeling, single-mode VCSELs, polarization control, polarization dynamics, very-high-speed design, high-power emission, use of high-contrast gratings, GaInNAsSb long-wavelength VCSELs, optical video links, VCSELs for optical mice and sensing, as well as VCSEL-based laser printing. The book appeals to researchers, optical engineers and graduate students.
Book Synopsis Chipless and Conventional Radio Frequency Identification: Systems for Ubiquitous Tagging by : Chandra Karmakar, Nemai
Download or read book Chipless and Conventional Radio Frequency Identification: Systems for Ubiquitous Tagging written by Chandra Karmakar, Nemai and published by IGI Global. This book was released on 2012-05-31 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio Frequency Identification (RFID) is a wireless tracking and data capturing technique for automatic identification, tracking, security surveillance, logistics, and supply chain management. RFID tags, which have been successfully employed in many industries including retail and healthcare, have provided a multitude of benefits but also currently remain very costly. Chipless and Conventional Radio Frequency Identification: Systems for Ubiquitous Tagging explores the use of conventional RFID technology as well as chipless RFID technology, which provides a cheaper method of implementation, opening many doors for a variety of applications and industries. This practical reference, designed for researchers and practitioners, investigates the growing field of RFID and its promising future.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-05 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis State-of-the-Art of High Power Gyro-Devices and Free Electron Masers. Update 2017 (KIT Scientific Reports ; 7750) by : Thumm, Manfred
Download or read book State-of-the-Art of High Power Gyro-Devices and Free Electron Masers. Update 2017 (KIT Scientific Reports ; 7750) written by Thumm, Manfred and published by KIT Scientific Publishing. This book was released on 2018-06-04 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
