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.
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Showing 1 to 8 of 8 for “"Yagi-Uda antenna"”.
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Moxon based RFID tag reader and GPS antenna
… applications at UHF frequencies require antennas with wide band, high forward gain, low backward radiation, high cross-polarization, small size and low manufacture cost. The Moxon antenna based on a two element Yagi-Uda antenna over the ground reflector is one of the most favorite …
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Application of base station with array of intelligent antennas in the energy distribution sector
… the mathematical concepts of an intelligent antenna array, as well as the logical operation of an intelligent radiation system controller are presented. Such a system receives as inputs the geographic coordinates of network elements and automatically feeds an intelligent Yagi-Uda antenna …
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Reconfigurable microstrip antennas with tunable radiation pattern characteristics
Reconfigurable beam antenna systems are capable of changing their radiation characteristics in real time, such as beam direction, beam shape, beamwidth, etc. Such antenna system is desired for various wireless applications because of many reasons among them; it helps to enhance signal strength …
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Analysis of Periodic and Random Capacitively-Loaded Loop (CLL) Metamaterial Structures for Antenna Enhancement Applications
… addition, this thesis introduces an innovative antenna enhancing structure consisting of capacitively-loaded loop (CLL) metamaterial elements loaded radially around a standard dipole antenna at an electrically small distance. As a result of this innovative arrangement, the dipole antenna is …
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INVESTIGATION OF SMALL ANTENNAS FOR PERSONAL HANDY PHONE USE
In this thesis, three types of small antennas for personal handy phone (PHP) use have been designed and analyzed using the Numerical Electromagnetics Code (NEC). First is the Modified Transmission Line Antenna (MTLA). It can provide a good impedance matching to 50Q at a very broad frequency band by …
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RF-MEMS switches for reconfigurable antennas
Reconfigurable antennas are attractive for many military and commercial applications where it is required to have a single antenna that can be dynamically reconfigured to transmit or receive on multiple frequency bands and patterns. RF-MEMS is a promising technology that has the potential to …
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Advanced light manipulation and waveguiding in plasmonic nanostructured optical fibers.
… (PM-PCF) and panda-shaped PM-optical fibers. A Yagi-Uda antenna-coupled low loss plasmonic slot waveguide is directly integrated on the optical fiber by direct milling technique. We demonstrated efficient coupling of light from the fiber core to the plasmonic slot waveguide. The light is then …
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Demonstrační zařízení pro sklízení energie
Tato semestrální práce se zabývá problematikou sklizně elektromagnetické energie. Popisuje jednotlivé části řetězce, které jsou podstatné pro zpracování vysokofrekvenční energie. Rozebírá možnosti řešení a jejich vlastnosti. Cílem této práce je návrh vhodné antény s pomocnými obvody pro komerčně …