Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 29 for “"RF circuits"”.
-
Magnetic Material Effects On Rf Circuits
… signals inside of microstrip transmission line circuits. This work is based on microstrip circuit designs that use magnetic materials for either the ground plane and/or as an insert inside the microstrip substrate. The microstrip circuits with inserts are characterized with AC and DC magnetic …
-
Vertical InAs Nanowire Devices and RF Circuits
… increase in the functionality of electronic circuits, allowing for continuous innovation, which benefits society. This increase in functionality has been facilitated by scaling down the dimensions of the most important electronic component in modern electronics: the Si-based MOSFET. By …
-
Analysis, simulation and design of nonlinear RF circuits
… Aided Design (CAD) algorithms for high-frequency circuits. Novel Padébased algorithms for numerical integration of ODEs as arise in high-frequency circuits are proposed. Both single- and multi-step methods are introduced. A large part of this section of the research is concerned with the …
-
Nanowire Transistors and RF Circuits for Low-Power Applications
… giving semiconductors a prolonged window of performance improvements. As a material choice, compound semiconductors with elements from group III and V (III-Vs), such as indium arsenide (InAs), have the possibility to dramatically decrease power consumption. The reason is the inherent electron …
-
Compensation technique for nonlinear distortion in RF circuits for multi-standard wireless systems
Recent technological advances in the RF and wireless industry has led to the design requirement of more sophisticated devices which can meet stringent specifications of bandwidth, data rate and throughput. These devices are required to be extremely sensitive and hence any external interference from …
-
Digital ADCs and ultra-wideband RF circuits for energy constrained wireless applications by Denis Clarke Daly.
… changed so dramatically that many traditional circuits and architectures are no longer optimal and/or feasible. As a solution, much research has focused on developing 'highly digital' circuits and architectures that are tolerant of the increased leakage, variation and degraded voltage headrooms …
-
Electrostatic Discharge Protection and Measurement Techniques for Radio Frequency Integrated Circuits
… to improve the measurement capability for RF circuit characterization. One of the new measurement systems is capable of detecting ESD failures in RF circuits with an improved sensitivity. The second new measurement system has a significantly higher measurement bandwidth and dynamic range, …
-
Circuit design and technological limitations of silicon RFICs for wireless applications
… of how an IC technology affects critical RF signal chain components will greatly aid the design of wireless systems and the development of process technologies for the increasingly complex applications that lie on the horizon. Many of the evolving applications will embody the concept of …
-
The Effect Of Hot Carrier Stress On Low Noise Amplifier Radio Frequency Performance Under Weak And Strong Inversion
This thesis work is mainly focused on studying RF performance degradation of a low noise amplifier (LNA) circuit due to hot carrier effect (HCE) in both the weak and strong inversion regions. Since the figures of merit for the RF circuit characterization are gain, noise figure, input, and output …
-
Study of the electromechanic aspects of RF MEM devices with particular emphasis on the dynamic behavior for the case of RF MEM switches and tuneable capacitors
… appealing MEMS applications are Radio Frequency (RF) switches. These devices have some outstanding advantages like low insertion loss, high isolation and linearity, but they suer from some drawbacks like low switching speed and lack of reliability. In the near future for many applications, like …
-
Parallel integrated receivers for multiple antenna wireless LAN systems
… and area consumption values for typical RF circuits. These models properly balance benefits of multiple antennas with drawbacks due to parallel radio overhead. Their application shows that the combined transceiver power dissipation can actually decrease with more antennas and also …
-
An embedded, wireless-energy-harvesting platform (E-WEHP) for powering sensors using existing, ambient, wireless signals present in the air
… is part of a bigger effort towards greening RF circuits and applications in order to reduce their pollution foot-print. Pollution due to modern electronics is primarily caused by non-biodegradable packaging waste and batteries that form a big part of most electronics. Electronic waste can …
-
Characterization and modeling of low-frequency noise in MOSFETs
For many years, RF and analog integrated circuits have been mainly developed using bipolar and compound semiconductor technologies due to their better performance. In the last years, the advance made in CMOS technology allowed analog and RF circuits to be built with such a technology, but the use …
-
Simulation and Analysis of Behavioral Analog Systems
Periodic circuits and systems which are stiff pose special problems to traditional simulators like SPICE due to the wide separation in time constants characterizing them. Examples of such systems include power electronic circuits, phase-locked loops and RF circuits such as narrow-band amplifiers …
-
Study Of Nanoscale Cmos Device And Circuit Reliability
… high transistor density and the corresponding performance enhancement. For these devices, the reliability issues are the first concern for the commercialization. The major reliability issues caused by voltage and/or temperature stress are gate oxide breakdown (BD), hot carrier effects (HCs), and …
-
Radio frequency circuit design and packaging for silicon-germanium hetrojunction bipolar technology.
The objective of this thesis is to design RF circuits using silicon-germanium (SiGe) heterojunction bipolar transistors (HBTs) for communication system. The packaging effect for the SiGe chip using liquid crystal polymer (LCP) is presented and methodology to derive the model for the package is …
-
Low Power Cmos Circuit Design And Reliability Analysis For Wireless Me
… serial converter for transmission by a 900 MHz RF transmitter that operates in amplitude shift keying modulation technique. The transmitter delivers a 2.2 mW power to a 50 Ù antenna. The system consumes an average current of 4.8 mA from a 3V supply when 6 sensors are in operation and …
-
Design and analysis of ultra-wide band and millimeter-wave antennas
… co-designing with analog/digital integrated circuits in the time domain by using a new automatic physical augmentation with tuning method. The proposed method has been validated for modeling a spiral inductor and an MIM capacitor in a wide bandwidth. Next, a new compact and multilayer UWB …
-
An enhanced design procedure for microstrip band pass filters
… such filters are essential in the design of RF circuits in communications and radar equipment. Reliable microstrip band pass filters which provide an accurate filter response at microwave frequencies can be easily fabricated with low cost. Equations concerning the design of coupled …
-
Analysis and design of wideband voltage controlled oscillators using self-oscillating active inductors.
… oscillators (VCOs) are essential components of RF circuits used in transmitters and receivers as sources of carrier waves with variable frequencies. This, together with a rapid development of microelectronic circuits, led to an extensive research on integrated implementations of the oscillator …
Page 1 of 2