The spiral-pole antenna: An electrically small, resonant hybrid dipole with structural modification for inherent reactance cancellation

A small “spiralpole” antenna – the hybrid structure where one dipole wing is kept, but another wing is replaced by a coaxial single-arm spiral, is studied both theoretically and experimentally. Such a structure implies the implementation of an impedance-matching network (an inductor in series with a small dipole) directly as a part of the antenna body. The antenna impedance behavior thus resembles the impedance behavior of a small dipole in series with an extra inductance, which is that of the spiral. However, there are two improvements compared to the case when an equivalent small dipole is matched with an extra lumped inductor. First, the spiralpole antenna has a significantly larger radiation resistance – the radiation resistance increases by a factor of two or more. This is because the volume of the enclosing sphere is used more efficiently. Second, a potentially lower loss is expected since we only need a few turns of a greater radius. The radiation pattern of a small spiralpole antenna is that of a small dipole, so is the first (series) resonance. The Q-factor of the antenna has been verified against the standard curves. The antenna is convenient in construction and is appealing when used in conjunction with passive RFID tags such as SAW temperature sensors

A Channel Model and Geolocation Simulation System

This report documents the design of a cooperative spectrum sensing network for emergency response applications. The network discerns radio modulation, center frequency, and the geographic coordinates of each emergency responder. The simulation is designed to emulate the wireless propagation characteristics of a real disaster environment by creating channel models. The project culminates with a graphical user interface that interactively displays system capabilities

The Plug-in Hybrid Electric Vehicle: Proliferation and Impact on Society and the Environment

This report analyzes the impact and predicts the success of the implementation of Plug-in Hybrid Electric Vehicles in Massachusetts. It is an expansion upon the group's April report, submitted by Kazim Naqvi and Timothy Yee. - This report expands and analyzes the oil market and determines how PHEVs will bring about a change in oil consumption and oil prices. It also addresses the environmental concern and whether PHEV's will curb or add to the current level of CO2 emissions

Impact of Plug-in Hybrid Electric Vehicles on the Local Electric Grid

The following document has been prepared in partial fulfillment of the requirements as a Bachelor of Science at WPI. The authors, Kazim Naqvi and Timothy Yee, are submitting this document as an IQP/MQP in lieu of the above mentioned requirements. The authors will address the possible impact of the advent of Plug-In Hybrid Vehicles in Massachusetts for National Grid. The authors will be utilizing Systems Dynamics Modeling as the basis for experimentation. The results of various modeling, research, and sensitivity exercises conducted during the course of this project show that PHEV's do take off and attain a sustainable value, as was the desired outcome. The impact on National Grid is minimal and the daily electric demand variation does not change significantly