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Full-Text Articles in Engineering
Hybrid Coupler Implemented As A Phase Shifter, John P. Vitale
Hybrid Coupler Implemented As A Phase Shifter, John P. Vitale
Master's Theses (2009 -)
Phase shifters are two-port microwave devices which take an input signal and output a phase shifted version of the signal. These devices can be used in phased antenna arrays, frequency translators, and IQ modulator/demodulator systems. The goal for this work is to construct a hybrid coupler phase shifter which will provide a 90 degree phase shift to a signal with a center frequency of 1800 MHz over a 5% bandwidth. This work is novel because the hybrid coupler phase shifter has not been extensively studied. Some papers have provided rough guidelines for constructing these shifters, but there is little exploration …
Design, Analysis, And Construction Of An Equal Split Wilkinson Power Divider, Logan J. Berens
Design, Analysis, And Construction Of An Equal Split Wilkinson Power Divider, Logan J. Berens
Master's Theses (2009 -)
The Wilkinson power divider is a well known device in the RF/microwave community used for splitting or combining signals. It is composed of simple transmission lines and a resistor, and takes advantage of the properties of quarter-wavelength transmission line sections to provide ideal power divider characteristics. Three different equal split Wilkinson power dividers are designed to operate near 1800 MHz and constructed using typical microstrip fabrication techniques. The three power dividers each feature a unique design to help determine how the microstrip layout can impact isolation and return loss. A circuit analysis of the general Wilkinson power divider schematic is …
Pulsed Class-G Rf Amplifier System, Kevin Maulhardt, Kevin Haskett
Pulsed Class-G Rf Amplifier System, Kevin Maulhardt, Kevin Haskett
Electrical Engineering
No abstract provided.
3d Electromagnetic Simulation Tool Exposure For Undergraduate Electrical Engineers: Incorporation Into An Analog Filters Course, Bobby B. Pheng
3d Electromagnetic Simulation Tool Exposure For Undergraduate Electrical Engineers: Incorporation Into An Analog Filters Course, Bobby B. Pheng
Master's Theses
With the growth of wireless communications, comes the need for engineers knowledgeable in 3D electromagnetic (EM) simulation of high-frequency circuits. To give electrical engineering students a better understanding of the behavior of electromagnetic fields, experiments including the use of 3D EM simulation software were proposed. Most students get lost in differential equations, curls, and divergences; this thesis aims to remedy that by exposing them to 3D EM simulation, which may motivate them toward further study in electromagnetics. Also, experience using EMPro is very beneficial for future RF/microwave/antenna engineers, as use of 3D EM simulation is becoming a requirement for this …
Design Of An Rf Cmos Power Amplifier For Wireless Sensor Networks, Hua Pan
Design Of An Rf Cmos Power Amplifier For Wireless Sensor Networks, Hua Pan
Graduate Theses and Dissertations
The Power Amplifier (PA) is the last Radio Frequency (RF) building block in a transmitter, directly driving an antenna. The low power RF input signal of the PA is amplified to a significant power RF output signal by converting DC power into RF power. Since the PA consumes a majority of the power, efficiency plays one of the most important roles in a PA design. Designing an efficient, fully integrated RF PA that can operate at low supply voltage (1.2V), low power, and low RF frequency (433MHz) is a major challenge. The class E Power Amplifier, which is one type …