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 18 of 18 for “"Planar Antenna"”.
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Design and Development of Planar Antennas and Dielectric Devices for use at W Band Frequencies
… examined in this thesis is the development of planar antennas for observations at W band frequencies. A large portion of this analysis is based on the specific development of devices as part of an ESA research package entitled “New Technology High Efficiency Horn Antennas for CMB Experiments …
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OPTIMAL ANTENNA DESIGNS FOR WIRELESS COMMUNICATION APPLICATIONS
Antennas design procedure, especially in portable devices, has been influenced by the growing demand for development of modern wireless communications. Hence, antennas that are wideband, compact, low profile, low cost, and easy to integrate into printed circuits are required. The research described …
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Design and analysis of ultra-wide band and millimeter-wave antennas
Ultra-wideband (UWB) antennas and 60-GHz millimeter-wave antennas and arrays are analyzed and designed in this thesis for developing high-speed short-range wireless communications. Firstly, a probe-fed crossed circle-disk monopole UWB antenna with stable omnidirectional radiation pattern was …
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Development of triple band planar inverted-H antenna for DCS, WIMAX and WLAN application
In this research, a triple band inverted-H planar antenna for DCS1700, WiMAX2600 and WLAN3100 is presented. The antenna consists of square planar radiating patch with dual rectangular slots suspended above the FR4 dielectric substrate. The antenna is fed by using microstrip transmission line …
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Development of compact dual-band monopole antenna for LTE application
Antenna plays an important role to radiate E fields and receive the E fields to induce the voltage at the input terminal of the receiver. Several antenna types are developed for wireless communication systems. Generally, it can be divided into two. One is elemental antenna and second one is …
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Analysis and design of planar slot antennas for RFID applications using characteristic mode theory
… room and reads information from a passive tag antenna. These systems have been implemented in the LF (12 {13 KHz), HF (13 MHz), UHF (860 { 960 MHz) frequency bands. Most RFID tags in the LF and HF use simple loop variants to achieve magnetic coupling between the reader and the tag and have …
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Digital Control Board for Phased Array Antenna Beam Steering in Adaptive Communication Applications
… of these techniques is spatial filtering through planar antenna array beam forming.</p> <p>This thesis describes the development of a digital system that adaptively controls a phased array antenna. The radiating structure of the phased antenna array is tetrahedral-shaped and contains four antenna …
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Computational Design of the Electrical and Mechanical Performance of Steerable MEMS Antennas
… and variations of a broadband microwave antenna that can be beam-steered by a micro-electromechanical system (MEMS). The steerable MEMS antenna of this work was comprised of a planar antenna on top of a Silicon membrane. The membrane is etched to create a gimbal hinge structure and a …
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Modeling & Development of Wirelessly Coupled Loops for Chip-to-Antenna Communications
… stacked in order to couple the signal from a planar antenna array (printed on the laminate) onto the IC. This antenna-to-chip system was simulated and measured to have center frequencies of 25 GHz and 23 GHz respectively, with a peak gain greater than 5 dBi at the beams broadside (8 dBi in …
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Direction Finding and Beamforming Techniques using Antenna Array for Wireless System Applications
… and the impact of the position-error of the antenna elements on the estimation accuracy is also studied. Then, several new efficient AOA methods for current wireless localisation systems are proposed. The estimation accuracy and computational complexity are compared with well-known AOA …
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Investigation into the design of broadband singly-fed electromagnetically coupled patch (EMCP) antenna elements and arrays for circular polarisation
… demands on broadband circularly polarised (CP) antenna elements and high-performance antenna arrays. The use of high-dielectric-constant materials as the substrate for the driven layer and a low-dielectric-constant material as superstrate for the radiating patch overcomes the conflict between …
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Pattern reconfigurable metamaterial antenna for 5G base station network
Reconfiguration of an antenna’s radiation pattern in a predefined direction is very important for enhancing the performance of communication systems in terms of the quality of service, system security, avoiding interference, and economizing power. Metamaterials, on the other hand, are commonly used …
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Two New Applications of Tensors to Machine Learning for Wireless Communications
… multiple-output (FD-MIMO) system with a uniform planar antenna (UPA) array at the transmitter (Tx) whose channel distribution is available through a dataset. Represented as a tensor, the FD-MIMO channel is further decomposed using a tensor decomposition technique to obtain an optimal precoder …
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Structural-Electromagnetic Simulation Coupling and Conformal Antenna Design Tool
… reconnaissance. Most airborne systems utilize antenna arrays that are installed inside the moldline of the aircraft or in radomes that protect the array from in-flight loads. While externally-mounted arrays can offer the advantage of larger apertures, sensor-vehicle interactions often result in …
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Design and Analysis of Circularly Polarized Electrically Small Antennas
… In these applications, a miniaturized antenna is sometimes necessary for reducing overall size of the communication system. For many satellite based communication applications, circular polarization in antennas is needed for efficient communication. In this thesis, the miniaturization …
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Dvoupásmová wi-fi anténa pro komunikaci uvnitř auta
Bakalárska práca sa zaoberá návrhom dvojpásmovej planárnej antény na textilnom substráte pre použitie vo WLAN sieťach v ISM pásmach 2,4 a 5,8 GHz vnútri automobilu. V teoretickej časti sú stručne opísané základné poznatky o vlastnostiach a typoch planárnych mikropásikových antén, spôsoboch …
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Application of metamaterial structures in the design, analysis and prototyping of planar : Antennas aplicación de estructuras metamateriales en el diseño, análisis y y prototipado de antenas planas
… in the design, analysis and prototyping of planar antennas", we want to continue with the line of investigation of planar antennas where the Radiation Group from the Technical University of Madrid has broad experience. The experience acquired with the design and analysis of planar antennas …
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Miniaturized Antenna for Satellite Broadband Application
User antenna is a crucial component of a high-speed satellite internet system. High directivity, broadband characteristics, and circularly polarized radiations are essential for a user antenna to maintain a reliable connection with the overhead LEO satellite constellation. For commercialization and …