Engineering Commons^™

Steerable Antenna Array For Uav Applications, Varsha Vijaykumar

Electrical Engineering Theses

An antenna array system design, demonstrating the possible application on an unmanned aerial vehicle platform using a full wave electromagnetic simulation software is presented. Linear array of patches in E plane and H plane are designed consisting of 4 elements with a beam steering ability of ±40 degree from the broadside direction with a peak gain of 12.23dB. Further an arrangement illustrating four such linear arrays, that can switch between each other to cover the entire azimuth scanning is shown. After a series of modified patch antenna designs with an attempt to increase the gain, an inset fed microstrip patch …

Origami Reconfigurable Electromagnetic Systems, Shun Yao

FIU Electronic Theses and Dissertations

With the ever-increasing demand for wireless communications, there is a great need for efficient designs of electromagnetic systems. Reconfigurable electromagnetic systems are very useful because such designs can provide multi-functionality and support different services. The geometrical topology of an electromagnetic element is very important as it determines the element’s RF performance characteristics. Origami geometries have significant advantages for launch-and-carry electromagnetic devices where devices need to fold in order to miniaturize their size during launch and unfold in order to operate after the platform has reached orbit.

This dissertation demonstrates a practical process for designing reconfigurable electromagnetic devices using origami structures. …

Wireless Communication For Greenhouse Environment, Chris J. Lambert, Dean T. Lockman, Ian A. Nielsen

Electrical Engineering

Modern day population growth and global climate change requires high-yield agricultural systems that can function in harsh environments. Greenhouses can maintain temperature and humidity, while serving as a protective, nurturing alternative to vulnerable farm environments. With weather effects eliminated, greenhouses provide productive environments for experimental agriculture techniques such as hydroponics and aquaculture. These methods of agriculture, specifically aquaculture, require constant monitoring. The failure of electronic devices such as an air pump prove fatal to a fish population in a short time frame. In developing countries, agricultural locations may be a significant distance from a farmer’s home, with no internet or …

Multifunctional Reconfigurable Antennas And Arrays Operating At 60 Ghz Band, Abdurazag Mohamed Khalat

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In this digital era, the demand for faster, reliable, and adaptive wireless communication systems is increasing. Various factors can affect the signal propagation in the wireless medium, such as weather, broadcast environment, physical obstructions, etc. This study aims to improve the antenna performance by means of dynamically altering its properties so that it can adapt to different environments and communication scenarios. This study is not resorting in a traditional antenna design, but rather explores an alternative approach known as the multifunctional reconfigurable antennas (MRAs). Unlike its predecessor, i.e., legacy antennas, MRAs can dynamically change its operation frequency, radiation pattern, and …

Beam Steerable Reconfigurable Antenna With Smart Rf Switching On 3d Parasitic Level, Mohammad Ababil Hossain

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Traditional antennas have a lot of limitations as their performance is usually fixed by their initial geometry. On the other hand, modern communication systems are getting way to complicated compared to their earlier counterparts. This necessitates some special types of smart or reconfigurable antennas, which can dynamically adapt to the requirements of the communication systems more effectively. Using conventional single functional antennas is therefore not an efficient approach in these sort of communication systems. Considering all these factors, in this thesis, a beam steerable reconfigurable antenna system is presented that can yield the radiation patterns of multiple antennas with a …

Uhf Rfid Antenna Impedance Matching Techniques, Kamron Sockolov

Master's Theses

Radio Frequency Identification (RFID) systems use electromagnetic signals to wirelessly identify and track RFID-tagged objects. A reader transmits a carrier wave request signal to an RFID tag, which then transmits a unique identification signal back to the reader. Applications include supply chain inventory management, automated toll booth fee systems, sports event timing, restricted access control, pet monitoring and retail theft prevention. An RFID tag includes an antenna connected to a Radio Frequency Integrated Circuit (RFIC). RFID tags in the ultra-high frequency (UHF), industrial, scientific and medical (ISM) 902-928MHz band and global Electronic Product Code (EPC) 860‑960MHz band are powered passively …

Optically Transparent Antennas And Filters, Ranjita Timsina, Joshua Pitchford, Michelle Guzman, Supapon Hia

Capstone Design Expo Posters

As society continues to increase its demand for wireless network access, more antennas, base stations, and network access points is a must. By integrating these antennas into existing infrastructure, such as buildings, cars, and street lights, network engineers can begin to meet these demands. In order to integrate antennas into windows, optical transparency is paramount. Optically transparent antennas are currently created through materials known as Transparent Conductive Oxides (TCOs). TCOs are doped metal oxides that have high optical transmittance and low electrical resistivity. TCOs are employed in flat panel displays, touch sensitive control panels, and electromagnetic shielding windows. The most …