Browsing by Author "Dean, Robert N., Jr."

Now showing items 1-11 of 11

Aperture Coupled Microstrip Patch Antenna for WIFI, WiMAX, and Radar Applications

Clayton, Christopher (2014-04-25)

The aperture-coupled microstrip patch antenna is presented. The operation frequency range of antenna is 4.8 - 5.2 GHz. This frequency range is possible due to the use of low dielectric materials for the patch and microstrip ...

Characterization of Die Stress in Microprocessor Packaging Due to Mechanical, Thermal, and Power Loading

Roberts, Jordan C. (2014-08-05)

Microprocessor packaging in modern workstations and servers often consists of one or more large flip chip die that are mounted to a high performance ceramic chip carrier. The final assembly configuration features a complex ...

Design and Testing of an Electronic Load Board for Power Supply Validation and Verification

Moses, Justin (2014-05-05)

As the need for high efficiency in power supplies increases, so does the need to test and verify the designs of the supplies. To test the design, efficiency, and reliability of a low-voltage, high-current power supply, an ...

Detection and Mitigation of Electrostatic Pull-in Instability in MEMS Parallel Plate Actuators

Stevens, Colin (2013-07-19)

Electrostatic MEMS actuators are used in a wide variety of applications including micro- machined gyroscopes, high speed mechanical switches, variable capacitors, and vibration isolation devices. MEMS parallel plate ...

An Experimental Investigation of Liquid Metal MHPs

Palkar, Ashish (2007-12-15)

The concept of heat pipes was introduced by R. S. Gaugler in 1940s and Cotter first introduced the idea of “micro” heat pipes in 1984. Cotter in his paper, defined the micro heat pipe as being one in which the mean curvature ...

Layout and Assembly of a High Efficiency Multi-Phase Buck Converter Utilizing Chip Scale GaN Devices

Henning, Stephan (2014-07-22)

As the world becomes increasingly immersed in the Information Age, more and more supercomputers and datacenters must be built to keep up with humanity’s demand for electronic information. As the number of these facilities ...

Planar Magnetics Design for Low Voltage High Power DC-DC Converters

Aggas, Jeffrey (2014-05-20)

Planar magnetic technology is widely used in a variety of applications from telecommunications to power electronics. In particular, the use of planar inductors and transformers in power electronics have burgeoned as a ...

Reliability of Lead-Free Electronic Package Interconnections under Harsh Environment

Hai, Zhou (2014-07-24)

Lead-free solder alloy has evolved and applied in industries for many years. The reliability is of concern for lead-free solder joints of assembled circuitry, especially those exposed to high temperature in a long period ...

Simulation and Analysis of a Metamaterial Filter on a Flexible Liquid Crystal Polymer Substrate

Blair, Udarius (2014-04-25)

Since 1968 there has been an ever increasing interest in the study of metamaterials. These man-made substances have tremendous potential to change the scientific study of optics, communications, and the overall RF regime. ...

Single and Multi-Phase Synchronous Buck Converter Voltage Control with Modeling, PID Controller Design, and Digital Implementation

Rhea, Benjamin (2014-07-03)

This paper covers the modeling and design of a digital controller for a single and multi-phase synchronous buck converter. First, a general overview of the power switching point-of-load (POL) converters will be presented. ...

Statistical Analysis of Time Delays in USB Type Sensor Interfaces on Windows-based Low Cost Controllers

Ramadoss, Lalitha (2008-12-15)

Real-time control systems need sensor data at periodic and predictable time intervals- this is one aspect of what is commonly called ""determinism"". Common forces that present challenges to determinism in Windows-based ...