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Showing 1 to 20 of 172 for “"Antenna array"”.
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Spherical antenna array
… radiation pattern of an isotropic spherical antenna array with two types of element distributions, a latitude-longitude distribution and an approximately equally-spaced distribution, has been analyzed using Poisson's Sum Formula. Beamwidth expressions of both element distributions are found …
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Antenna Array Systems: Propagation and Performance
… performance gains associated with the use of antenna arrays in wireless networks, it is inevitable that these technologies will become an integral part of future systems. This report focuses on signal propagation modeling for antenna array systems and on its relationship to the performance of …
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Interference Mitigation by Reconfigurable Adaptive Antenna Array
Antenna arrays play an important role in diverse application areas, such as target detection and direction of arrival (DOA) estimation to list a few. Traditional receiver structures with a fixed array configuration are either inefficient due to array redundancies or may incur significant …
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Substrate Integrated Waveguide Horn Slot Antenna Array
… which is synthesized in a planar substrate with arrays of metallic vias to realize bilateral side walls and its transitions with planar structures. These vias act as walls of the waveguide supporting current flow, thus allowing for waveguide mode propagation. Substrate integrated waveguide is …
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Unconventional Architectures and Methodologies for Antenna Array Synthesis
Phased array (PA) antennas represent a key enabling technology for current and next-generation wireless systems, yet their large-scale deployment is often discouraged by the cost and complexity associated with fully populated architectures. Within this context, this thesis investigates …
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CAPACITY ENHANCEMENT OF CDMA SYSTEM USING ANTENNA ARRAY
… access (CDMA) system with uniform linear array (ULA) at the base station (BS) [1 - 3]. An overall system outage probability is proposed as a capacity performance measure for multirate CDMA system with different service requirements among users. In this thesis, the performance analysis of a …
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The optimal starting point for antenna array design
… gain and pattern flexibility offered by phased arrays. While numerous ""novel"" one-off solutions as well as synthesis methods exist, these often gloss over initial design decisions and problem-specific conditions, limiting their usefulness across different scenarios. Furthermore, arrays are …
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Size reduction of vivaldi antenna array for microwave imaging
UWB antennas with compact size, stable patterns of end-fire radiation and high gain find many of applications such as radar, microwave imaging, remote sensing. To achieve these goals, a compact-sized end-fire slot antenna (TSA) is a good candidate as it offers broad impedance bandwidth and stable …
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On the synthesis of optimum monopulse antenna array distributions
… specifications of modern tracking systems demand antennas of high performance. For this reason arrays are finding increasing application as monopulse antennas. A new exact procedure is introduced for the synthesis of optimum difference distributions for linear arrays of discrete elements, with a …
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Development of ultra wideband antenna array for human detection under debris
… which addresses both while designing the single antenna. This research is about the designing of an antenna and its array that will be able to operate in entire UWB band defined from 3.1 GHz to 10.6 GHz, which is available freely for research and experimentation purpose. The reason for designing …
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Composite Right-Left Handed Stripline Structures for Antenna Array Feed Networks
… are proposed as viable key structures in antenna array applications, enabling reduction of the overall feed network sizes as well as allowing integration opportunities and possible reduction of radiating beam pattern distortions.</p> <p>A via-less composite right/left-handed stripline unit …
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Frequency Selective Detection of Infrared Radiation in Uncooled Optical Nano-Antenna Array
… In this study, we designed an optical nano-antenna array based detector with narrow frequency band of operation. The structure consists of a two-element antenna array comprised of a perforated metallic hole array coupled with an underneath disk array which trap incident radiation as dipole …
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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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Evaluation of Joint AOA and DOA Estimation Algorithms Using the Antenna Array Systems
We have created an eight-element antenna array system for evaluating various Angle of Arrival (AOA) Position Location (PL) algorithms, such as MUltiple SIgnal Classification (MUSIC) and Estimation of Signal Parameters via Rotational Invariance Techniques ESPRIT algorithms. Since using delay of …
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Null Depth Trade Off for Output Power Reduction in a Downlink Adaptive Antenna Array
… to the basestation. However, downlink adaptive arrays use additional power when they are required to include null steering in their beam patterns. This excessive transmitted power reduces the effective antenna gain, increases interference in other directions and has implications on the …
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Design and Analysis of a Cylindrical Dielectric Resonator Antenna Array and Its Feed Network
… need for smaller, lighter, more efficient antennas for commercial and military applications. One such antenna that meets these requirements is the dielectric resonator antenna (DRA). In recent years there has been an abundance of research on the utilization of the DRA as a radiating …
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Radio Channel Measurements and Modeling for Smart Antenna Array Systems Using a Software Radio Receiver
… wave propagation measurement and modeling, smart antenna arrays, and software-defined radio development. A four-channel, wideband, software-defined receiver was developed to serve as a test bed for wideband measurements and antenna array experiments. This receiver was used to perform vector …
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