Download or read book Integrated Realizations of Reconfigurable Low Pass and Band Pass Filters for Wide Band Multi mode Receivers written by Gabor-Laszlo Csipkes and published by . This book was released on 2006 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integrated Realizations of Reconfigurable Low Pass and Band Pass Filters for Wide Band Multi mode Receivers written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With the explosive development of wireless communication systems the specifications of the supporting hardware platforms have become more and more demanding. According to the long term goals of the industry, future communications systems should integrate a wide variety of standards. This leads to the idea of software defined radio, implemented on fully reconfigurable hardware. Among other reconfigurable hardware blocks, suitable for the software radio concept, an outstanding importance belongs to the reconfigurable filters that are responsible for the selectivity of the system. The problematic of filtering is strictly connected to the architecture chosen for a multi-mode receiver realization. According to the chosen architecture, the filters can exhibit low pass or band pass frequency responses. The idea of reconfigurable frequency parameters has been introduced since the beginning of modern filtering applications due to the required precision of the frequency response. However, the reconfiguration of the parameters was usually done in a limited range around ideal values. The purpose of the presented research is to transform the classical filter structures with simple self-correction into fully reconfigurable filters over a wide range of frequencies. The ideal variation of the frequency parameters is continuous and consequently difficult to implement in real circuits. Therefore, it is usually sufficient to use a discrete programming template with reasonably small steps. There are several methods to implement variable frequency parameters. The most often used programming templates employ resistor and capacitor arrays, switched according to a given code. The low pass filter implementation proposed in this work uses a special switching template, optimized for a quasi-linear frequency variation over logarithmic axes. The template also includes the possibility to compensate errors caused by component tolerances and temperature. Another important topic concerns the implement.
Download or read book Bio Inspired Technologies for the Hardware of Adaptive Systems written by Mircea Gh. Negoita and published by Springer Science & Business Media. This book was released on 2009-03-24 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evolvable Hardware (EHW) has emerged as a sub-domain of artificial evolution represented by a design methodology (consortium of methods) involving the application of Evolutionary Algorithms (EA) to the synthesis of digital and analogue electronic circuits and systems. Nevertheless, the most benefit for the society and indeed most revolutionizing application of EA is its hardware implementation leading to the EHW. These new EA based methodologies led to a new type of machines that is evolved to attain a desired behaviour, which means they have a behavioural computational intelligence. EHW is a special case of the adaptive hardware, namely being strongly related to the Adaptive Systems (AS) and the Adaptive Hardware (AH). The book presents a careful selection of the field that very well reflects the breadth of this high technology and its terminology and applications in context of the AS/AH. The harmonious symbiosis of the engineering approach and the accurate scientific methodology features the aspects of highly relevant and practical design principles governing the development of EHW and its connections with AS/AH. This book is both attractive and useful for everybody interested in the design and analysis of EHW in context of AS/AH and implementation of real time adaptive hardware hybrid intelligent systems.
Download or read book Continuous Time Low Pass Filters for Integrated Wideband Radio Receivers written by Ville Saari and published by Springer Science & Business Media. This book was released on 2012-03-15 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a new filter design approach and concentrates on the circuit techniques that can be utilized when designing continuous-time low-pass filters in modern ultra-deep-submicron CMOS technologies for integrated wideband radio receivers. Coverage includes system-level issues related to the design and implementation of a complete single-chip radio receiver and related to the design and implementation of a filter circuit as a part of a complete single-chip radio receiver. Presents a new filter design approach, emphasizing low-voltage circuit solutions that can be implemented in modern, ultra-deep-submicron CMOS technologies;Includes filter circuit implementations designed as a part of a single-chip radio receiver in modern 1.2V 0.13um and 65nm CMOS;Describes design and implementation of a continuous-time low-pass filter for a multicarrier WCDMA base-station;Emphasizes system-level considerations throughout.
Download or read book Advances in Microwave Engineering written by Ankan Bhattacharya and published by CRC Press. This book was released on 2023-11-21 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text showcases recent advancements in the field of microwave engineering, starting from the use of innovative materials to the latest microwave applications. It also highlights safety guidelines for exposure to microwave and radio frequency energy. The book provides information on measuring circuit parameters and dielectric parameters. • Explains microwave antennas, microwave communication, microwave propagation, microwave devices, and circuits in detail • Covers microwave measurement techniques, radiation hazards, space communication, and safety measures • Focuses on advanced computing technologies, wireless communication, and fiber optics • Presents scattering matrix and microwave passive components and devices such as phase shifters and power dividers • Showcases the importance of space communication, radio astronomy, microwave material processing, and advanced computing technologies The text provides a comprehensive study of the foundations of microwave heating and its interactions with materials for various applications. It also addresses applications of microwave devices and technologies in diverse areas, including computational electromagnetics, remote sensing, transmission lines, radiation hazards, and safety measures. It emphasizes the impact of resonances on microwave power absorption and the effect of nonuniformity on heating rates. The text is primarily written for senior undergraduate students, graduate students, and academic researchers in the fields of electrical engineering, electronics and communication engineering, computer engineering, and materials science.
Download or read book Design and Synthesis Techniques for Reconfigurable Microwave Filters Using Single and Dual mode Resonators written by Cesar A. Lugo (Jr) and published by . This book was released on 2006 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis discusses the investigation and development of design methodologies for the creation of multi-functional bandpass filters at microwave frequencies. These filters are capable of tuning to different frequency bands as well as varying their fractional bandwidth. The research also studies polynomial synthesis procedures as a tool for the derivation of reconfigurable planar filters with advanced asymmetrical responses.
Download or read book Reconfigurable Band pass Comb line Filter Design written by Jinjing Li and published by . This book was released on 2020 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio Frequency/Microwave filter is a key component that defines the performance of the front-end portion of the modern wireless communication system. A well-designed Radio Frequency/Microwave filter is able to select and pass/reject the frequency of the signals to be transmitted/received or attenuated with minimum added loss and interference. With the rapid development of wireless communication technologies, the modern handset device needs to integrate multiple technologies, services, and applications (LTE, Wi-Fi, Bluetooth, GPS, GNSS) covering the frequency spectrum from a few hundred megahertz to 7GHz, posing extreme challenges to the spectrum filtering functions and size reduction. The filters in the modern RF frontend are realized with filter banks, which means that each filter is dedicated to a certain frequency range for a specific service. On the other hand, filters with reconfigurable characteristics can be a good candidate to replace the traditional filter banks due to their flexibility, smaller size, and lower cost. The challenge from the current literature is the limited tuning capability and added filter losses from the tuning circuit. In this thesis, a 3rd order Chebyshev planar comb-line band-pass filter is designed at a center frequency of 1.5GHz with 20% fractional bandwidth, and 0.01 Ripple factor on a Microstrip substrate. Tuning capability is achieved by replacing the resonator-loaded capacitors with varactors. The final measurements show a tuning range from 1.45GHz to 1.71GHz, an insertion loss of 3.6dB, a return loss better than 10dB, and an out-of-band rejection better than 35dB. The size of the standalone comb-line filter is 20.8mm by 24.6mm, and the varactor-tuned filter with the biasing circuit is 63.5mm by 43.7mm. In wireless communication, the wider bandwidth allows the higher speed of signal transmission. And for tunable components, it is important to keep their performance constant. Compared to previously published works, this design is for achieving a wider bandwidth and maintaining the broad passband while tuning.
Download or read book Innovations in Electrical and Electronic Engineering written by Saad Mekhilef and published by Springer Nature. This book was released on 2022-04-26 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book features selected high-quality papers presented at International Conference on Electrical and Electronics Engineering (ICEEE 2022), jointly organized by University of Malaya and Bharath Institute of Higher Education and Research India during January 8–9, 2022, at NCR New Delhi, India. The book focuses on current development in the fields of electrical and electronics engineering. The book one covers electrical engineering topics–power and energy including renewable energy, power electronics and applications, control, and automation and instrumentation and book two covers the areas of robotics, artificial intelligence and IoT, electronics devices, circuits and systems, wireless and optical communication, RF and microwaves, VLSI, and signal processing. The book is beneficial for readers from both academia and industry.
Download or read book Reconfigurable Microstrip Bandpass Filters Phase Shifters Using Piezoelectric Transducers and Beam scanning Leaky wave Antennas written by Chan Ho Kim and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In modern wireless communication and radar systems, filters play an important role in getting a high-quality signal while rejecting spurious and neighboring unwanted signals. The filters with reconfigurable features, such as tunable bandwidths or switchable dual bands, also play a key part both in realizing the compact size of the system and in supporting multi-communication services. The Chapters II-IV of this dissertation show the studies of the filters for microwave communication. Bandpass filters realized in ring resonators with stepped impedance stubs are introduced. The effective locations of resonant frequencies and transmission zeros are analyzed, and harmonic suppression by interdigital-coupled feed lines is discussed. To vary mid-upper and mid-lower passband bandwidths separately, the characteristic impedances of the open-circuited stubs are changed. Simultaneous change of each width of the open-circuited stub results in variable passband bandwidths. Asymmetric stepped-impedance resonators are also used to develop independently controllable dual-band (2.4 and 5.2 GHz) bandpass filters. By extending feed lines, a transmission zero is created, which results in the suppression of the second resonance of 2.4-GHz resonators. To determine the precise transmission zeros, an external quality factor at feeders is fixed while extracting coupling coefficients between the resonators. Two kinds of feed lines, such as hook-type and spiral-type, are developed, and PIN diodes are controlled to achieve four states of switchable dual-band filters. Beam-scanning features of the antennas are very important in the radar systems. Phase shifters using piezoelectric transducers and dielectric leaky-wave antennas using metal strips are studied in the Chapters V-VII of this dissertation. Meandered microstrip lines are used to reduce the size of the phase shifters working up to 10 GHz, and reflection-type phase shifters using piezoelectric transducers are developed. A dielectric film with metal strips fed by an image line with a high dielectric constant is developed to obtain wide and symmetrical beam-steering angle. In short, many techniques are presented for realizing reconfigurable filters and large beam-scan features in this dissertation. The result of this work should have many applications in various wireless communication and radar systems.
Download or read book Design and Fabrication of a Wideband CMOS Continuous time Integrated Baseband Active Filter for a Synthetic Aperture Radar Receiver written by Faizah Abu Bakar and published by . This book was released on 2016 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research work is to design and fabricate a low-pass continuous-time integrated baseband filter circuit with cutoff frequency of 50 MHz up to 160 MHz as part of a fully integrated Synthetic Aperture Radar (SAR) receiver. The filter should exhibit passband ripple from ±0.5 dB to ±1 dB as a standalone circuit and -20 dB attenuation at 220 MHz. The integrated low-pass filter to be designed is targeted to provide gain of 20% to 30% percent from the whole baseband gain. Measurements of the filter (baseband) as a standalone structure are to be done in order to show the functionality of the filter and the feasibility of it to comply the specifications of the filter circuit alone. Then, the filter is going to be measured together with the other receiver building blocks in different temperatures to demonstrate the functionality of the filter and the feasibility of it to fulfil the specifications of a complete integrated SAR receiver in a different environment.
Download or read book A Reconfigurable Digital Filter Bank for Ultra Wideband Impulse Receiver written by Rohit Naik and published by . This book was released on 2009 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is the most suitable UWB communication technique for the target application due to potential of low power digital implementation. The impulse radio digital receiver architecture uses significant parallelism in the digital backend in order to speed up acquisition and reduce operating frequency. The digital backend employs a bank of parallel pulse matched filters (PMFs) and pseudo-random noise correlators (PNCs) for acquisition and synchronisation, enabling worst case channel condition operation. This parallelism results in high power consumption during the acquisition and synchronisation mode which contributes significantly to the increase in overall receiver power consumption. To employ this UWB receiver for the WSN applications the power consumption needs to be reduced. The UWB receiver is designed to operate in worst case channel condition, however the channel condition is not worst all the time.
Download or read book N path Filtering for Wideband Receivers written by Cheng-kai Luo and published by . This book was released on 2016 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growing demand for multi-band wireless systems has emphasized tunable highly linear filtering without sacrificing cost or form factor. The 3G/4G frequency-division duplex (FDD) cellular systems such as long-term evolution (LTE) are more prone to interference from strong blockers associated primarily with the co-located transmit signal. In an LTE receiver (RX), transmit signal introduces a strong out-of-band (OOB) blocker, transmit (TX) leakage, placing stringent linearity and power-handling capability requirements at the diversity RXs. In conventional multi-band systems, a large number of SAW filters are used and single-pole multi-throw switches select the appropriate SAW filter for the desired channel. The cascaded insertion loss of the filter and switch, impose a significant noise performance degradation. Therefore, filtering solutions that are tunable, blocker tolerant, and highly linear are critical to extending multi-band schemes. In this research work, tunable filters are proposed with offset band-reject filtering to address TX leakage. First, a N-path filter is demonstrated in 45-nm CMOS SOI technology and consists of a combination of tunable band-pass and band-reject filtering. A tunable filter was presented with more than a decade tuning range, high linearity and blocker tolerance for a SAW-less diversity path receiver in FDD cellular systems. The 3-dB bandwidth (BW) of the pass band is greater than 80 MHz with an independently tunable reject band, providing the ultimate rejection is 33 dB to 41 dB while the pass band insertion loss is between 2.6 dB and 4.3 dB over the tuning range. The proposed filter offers 29-dBm OOB 3rd-order input-intercept power (IIP3) and 22-dBm in band (IB) IIP3 with a 10-dBm blocker 1-dB compression point (B1dB). Then, A channel-selecting low-noise amplifier (CS-LNA) with blocker filtering is presented for a SAW-less diversity path receiver in frequency-division duplexing cellular systems. A hybrid-path bandpass filter/band-reject filter (BPF/BRF) feedback network is applied to the LNA to create close-in reject bands around the passband to suppress transmit leakage and improve the out-of-band (OOB) input-referred third-order intercept point (IIP3). Control of the frequency and depth of the reject bands is demonstrated with analysis and simulation. A cancellation linearization is applied to improve the in-band (IB) linearity. Adaptive LO swing and silicon-on-insulator (SOI) thick-oxide devices are demonstrated to improve the power-handling capability. The proposed CS-LNA is implemented in 32-nm CMOS SOI and operates from 0.4 to 6 GHz with the maximum rejection larger than 60 dB and power-handling capability up to 17 dBm. The prototype demonstrates an OOB IIP3 of 36 dBm and IB IIP3 of 10 dBm at 1 GHz. To the authors' knowledge, this is the highest blocker rejection, power-handling capability, linearity, and the widest tuning range for an LNA with tunable filtering.
Download or read book Digital Channelized Wide Band Receiver Implemented with a Systolic Array of Multi Rate FIR Filters written by David M. Rodney and published by . This book was released on 2006 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis proposes the use of a Systolic Array of Multi-Rate FIR Filters to improve performance by eliminating the requirement of the FFT and De-Multiplexer associated with the conventional receiver while achieving the same functionality. The FFT is a major bottle neck for improving system performance for the conventional DCWBR because many complex multiplications and additions are required. The proposed new architecture is designed and evaluated in MATLAB to illustrate its viability. Two approaches for improved channel arbitration are accessed in MATLAB, namely, channel bin’s rms comparison and parallelism of the Systolic Array Multi-Rate FIR Filters. The FIR filters (high-pass & low-pass) were successfully designed with Cadence tools using 0.13um technology and are fully functional at clock frequencies up to 1.8 GHz. The limitation of computing resources/verification tools prevented the simulation of the entire array of Multi-Rate filters as proposed. Nevertheless, a two tier tree of Multi-Rate FIR filters demonstrated channelization in cadence (simulations which can be completed within the constraints of computing facilities) and is consistent with those of MATLAB; thus, proving the viability of using the Systolic Array of Multi-Rate FIR Filters as a potential architecture for improving performance of DCWBR.
Download or read book Advances in Filter Miniaturization and Design analysis of RF MEMS Tunable Filters written by Vikram Sekar and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The main purpose of this dissertation was to address key issues in the design and analysis of RF/microwave filters for wireless applications. Since RF/microwave filters are one of the bulkiest parts of communication systems, their miniaturization is one of the most important technological challenges for the development of compact transceivers. In this work, novel miniaturization techniques were investigated for single-band, dual-band, ultra-wideband and tunable bandpass filters. In single-band filters, the use of cross-shaped fractals in half-mode substrate-integrated-waveguide bandpass filters resulted in a 37 percent size reduction. A compact bandpass filter that occupies an area of 0.315 mm2 is implemented in 90-nm CMOS technology for 20 GHz applications. For dual-band filters, using half-mode substrate-integrated-waveguides resulted in a filter that is six times smaller than its full-mode counterpart. For ultra-wideband filters, using slow-wave capacitively-loaded coplanar-waveguides resulted in a filter with improved stopband performance and frequency notch, while being 25 percent smaller in size. A major part of this work also dealt with the concept of 'hybrid' RF MEMS tunable filters where packaged, off-the-shelf RF MEMS switches were used to implement high-performance tunable filters using substrate-integrated-waveguide technology. These 'hybrid' filters are very easily fabricated compared to current state-of-the-art RF MEMS tunable filters because they do not require a clean-room facility. Both the full-mode and half-mode substrate-integrated waveguide tunable filters reported in this work have the best Q-factors (93 - 132 and 75 - 140, respectively) compared to any 'hybrid' RF MEMS tunable filter reported in current literature. Also, the half-mode substrate-integrated waveguide tunable filter is 2.5 times smaller than its full-mode counterpart while having similar performance. This dissertation also presented detailed analytical and simulation-based studies of nonlinear noise phenomena induced by Brownian motion in all-pole RF MEMS tunable filters. Two independent mathematical methods are proposed to calculate phase noise in RF MEMS tunable filters: (1) pole-perturbation approach, and (2) admittance-approach. These methods are compared to each other and to harmonic balance noise simulations using the CAD-model of the RF MEMS switch. To account for the switch nonlinearity in the mathematical methods, a nonlinear nodal analysis technique for tunable filters is also presented. In summary, it is shown that output signal-to-noise ratio degradation due to Brownian motion is maximum for low fractional bandwidth, high order and high quality factor RF MEMS tunable filters. Finally, a self-sustained microwave platform to detect the dielectric constant of organic liquids is presented in this dissertation. The main idea is to use a voltage- controlled negative-resistance oscillator whose frequency of oscillation varies according to the organic liquid under test. To make the system self-sustained, the oscillator is embedded in a frequency synthesizer system, which is then digitally interfaced to a computer for calculation of dielectric constant. Such a system has potential uses in a variety of applications in medicine, agriculture and pharmaceuticals.
Download or read book Recent Technical Developments in Energy Efficient 5G Mobile Cells written by Raed A. Abd-Alhameed and published by MDPI. This book was released on 2020-06-17 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the true innovation in engineering design that may be promoted by blending together models and methodologies from different disciplines, and, in this book, the target was exactly to follow this approach to deliver a new disruptive architecture to deliver these next-generation mobile small cell technologies. According to this design philosophy, the work within this book resides in the intersection of engineering paradigms that includes “cooperation”, “network coding”, and “smart energy-aware frontends”. These technologies will not only be considered as individual building blocks, but re-engineered according to an inter-design approach resulting in the enabler for energy efficient femtocell-like services on the move. The book aims to narrow the gap between the current networking technologies and the foreseen requirements that are targeted at the future development of the 5G mobile and wireless communications networks in terms of the higher networking capacity, the ability to support more users, the lower cost per bit, the enhanced energy efficiency, and adaptability to new services and devices (for example, smart cities, and the Internet of things (IoT)).
Download or read book Deutsche Nationalbibliografie written by Die deutsche Nationalbibliothek and published by . This book was released on 2006 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ANALOG MOS INTEGRATED CIRCUITS FOR SIGNAL PROCESSING written by Roubik Gregorian and published by . This book was released on 2008-09-01 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Market_Desc: · Engineers· Managers· Technicians About The Book: The book describes the operating principles of analog MOS integrated circuits and how to design and use such circuits. The initial section explores general properties of analog MOS integrated circuits and the math and physics background required. The remainder of the book is devoted to the design of circuits. It includes such devices as switched-capacitor filters, analog-to-digital and digital-to-analog converters, amplifiers, modulators, oscillators, and others. Tables and numerical design examples clarify the step-by-step processes involved. An Instructor's Manual presenting detailed solutions to all the problems in the book is available from the Wiley editorial department.
