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 20 of 23 for “"Phased Array Antenna"”.
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Development of wideband phased array antenna
… the range from 4 to 8 GHz requires compact antenna to provide desirable characteristic over whole operating band. This project consists of two designs; first design is presented with optimum geometry of an ultra wideband circular patch antenna. To achieve an UWB characteristic, a patch …
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Analysis of phased array antenna radiation patterns including mutual coupling
Methods of expressing the radiation patterns of phased arrays in closed form that include the effects of radiated mutual coupling are investigated. The two basic methods considered are the classical array analysis method and the active element pattern methods. The theoretical derivations of the …
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DESIGN AND IMPLEMENTATION OF A PHASED ARRAY ANTENNA FOR MULTI-MISSION APPLICATIONS
Multifunction Phased Array Radar (MPAR) was defined to investigate the feasibility of integrating weather observation and air surveillance radars into a single network. Weather radars require dual polarization capability which may be also beneficial to aircraft characterization. Research activities …
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Digital Control Board for Phased Array Antenna Beam Steering in Adaptive Communication Applications
… 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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Design and analysis of reconfigurable phased array antenna for wireless local area network applications
… REQUEST.] Due to the large demand in designing antennas that have high performance with low cost, this work proposes a design of reconfigurable phased array antenna operating at the two frequency bands specified by the Federal Communication Commission (FCC) for Wireless Local Area Network (WLAN) …
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Design and Simulation of a Two-Dimensional Beam Steered Millimeter-Wave Phased Array Antenna at W-Band (75 – 110 GHz, respectively 4 – 2.7 m)
Antennas play a significant role in wireless communication systems and have a direct impact on their performance. In particular, Millimeter-wave systems have gained popularity in the wireless communication sector in response to rising demand for greater throughputs, reduced interference, and …
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X60: A Programmable Testbed for Wideband 60 GHz WLANS with Phased Array
… provides multi-Gbps rates and has a 24-element phased array antenna with 4 user selectable phase weights. The testbed is based off of National Instruments mmWave 2GHz Reconfigurable Software Defined Radio. It contains multiple high performance field programmable gate arrays (FPGA) for …
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Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray
The reflectarray has been considered as a suitable candidate to replace the conventional parabolic reflectors because of its high-gain, low profile, and beam reconfiguration capability. Beam scanning capability and multi-band operation of the microstrip reflectarray have been main research topics …
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Design and Analysis of an Electronically Steerable Microstrip Patch and a Novel Coplanar Waveguide (CpW) Fed Slot Antenna Array
<p>Conformal Phased Array Antennas (CPAAs) are very attractive for their high gain, low profile, and beam scanning ability while being conformal to their mounting surface. Among them are microstrip patch phased arrays and wideband slot phased arrays which are of particular significance.</p> <p>In …
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Sensor Package Analysis and Simulation for Direct Sensor-to-Satellite Links
… element with a wide beamwidth or a miniature phased array antenna that continuously scans to access the satellite(s). The array beam is controlled with a beam-forming network (BFN), which contains 3 or 4-bit phase shifters, which can be made in micro-electro-mechanical systems (MEMS) or in …
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Link Establishment in Ad Hoc Networks Using Smart Antennas
… been designed for nodes using omni directional antennas. Through the use of directional antennas, it is possible to obtain higher efficiency. In this thesis we investigate the impact of these antennas on aggregate throughput and end-to-end delay. The use of omni-directional antennas not only …
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Exploration of liquid crystal polymer packaging techniques for rf wireless systems
… and for the realization of highly integrated phased-array antenna systems.
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An open source array antenna toolbox implementation
… first transmission of radio waves by means of phased array antennas was demonstrated. Since then, the further development of phased array radars was largely driven from a military point of view, with operational phased array systems implemented as far back as the second World War. In recent …
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Nanophotonic visible light phased arrays
Previously demonstrated integrated optical phased arrays have primarily been implemented in silicon-based platforms and have therefore been limited to operation at infrared wavelengths, where silicon provides low-loss transmission. Developing integrated optical phased arrays for visible wavelengths …
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Integrated broadband microphotonic beamformer for adaptive nulling in smart antennas
… rates for wireless communication systems. Smart antennas are the promising technology for improving the wireless communication systems performance. Smart antennas are system that consist of antenna arrays capable of adaptively adjusting the beam pattern, thereby enhancing the desired signals …
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Phased Array 802.11g Antenna
This thesis involves the development of a 2.4GHz phased array antenna for consumer wireless applications. 802.11g specifications include 11 channels from 2.412 GHz to 2.472 GHz. Each channel has a 22MHz minimum bandwidth with a 5 MHz center-to-center interchannel spacing. Design goals for the …
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Substrate integrated waveguide antenna systems
… focuses on SIW technology. Five di erent antenna systems are proposed to verify the advantages of using SIW technology. First, a novel K-band end- re SIW circularly polarized (CP) antenna system on a single layer printed-circuit board is proposed. A high gain SIW H-plane horn and a Vivaldi …
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Modal and radiation characteristics of the crossed-septum dielectric loaded waveguide for wideband applications
Broadband, high power, dual polarized phased arrays constructed from waveguide type elements generally require a 90 degree rotationally symmetric waveguide cross sectional geometry that can support single-mode propagation over the desired bandwidth. This dissertation presents a novel method of …
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HIGH-PERFORMANCE ANTENNA ARRAYS FOR MULTIFUNCTION PHASED ARRAY RADAR (MPAR) APPLICATION
… the U.S with a single network of Multifunction Phased Array Radar (MPAR). Candidates being considered for future MPAR include Cylindrical Polarimetric Phased Array Radar (CPPAR), and Planar Polarimetric Phased Array Radar (PPPAR). To have the desired accurate weather measurements with a PPPAR or …
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Reconfigurable phased microstrip antenna array with defected ground structure and defected microstrip structure for beam steering application
… to electronically steer the beam maximum of an antenna electric field pattern to some predefined point in space. The performance of a phased antenna array for beam steering without moving the antennas is important to military and civil applications. A steerable antenna with tunable phase shifter …
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