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Showing 1 to 10 of 10 for “"Vivaldi antenna"”.
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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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Development of an Electrically Small Vivaldi Antenna: The CReSIS Aerial Vivaldi (CAV-A)
… the CReSIS Meridian UAV requires a broadband antenna array composed of lightweight, thin, end-fire antenna elements. Toward this goal four Vivaldi antenna designs were simulated, fabricated, and characterized. The final design, dubbed the CReSIS Aerial Vivaldi - Revision A (CAV-A) provides …
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Ultra-Wideband Imaging System For Medical Applications. Simulation models and Experimental Investigations for Early Breast Cancer & Bone Fracture Detection Using UWB Microwave Sensors
… radar approach. An actively tuned UWB patch antenna and a UWB Vivaldi antenna are designed and utilised as sensing elements in the aforementioned applications. Both UWB antennas were developed over a range of frequency spectrum, and then characteristics were tested against their ability for …
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Parametric Yield and Tolerance Optimisation of Electromagnetic Devices using Feature-based Non-Linear Partial Least Squares Polynomial Chaos Expansion Surrogates
… aperture array (MFAA) log periodic dipole antenna (LPDA) with 93 geometrical variables and an 18-variable KA band ridge waveguide filter terminated with a Vivaldi antenna. This allows for accurate yield and sensitivity estimates using 24 and 100 high-fidelity samples, respectively. Compared …
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Modulation techniques for GPR system radargram
… underground is dependent on the ultra-wideband antenna use. Based on this antenna type, the fractional bandwidth used by the GPR system is usually greater or equal to 1. On the other hand, the GPR system using fractional bandwidth less than 1 will produce unsmooth GPR radargram, as the …
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Wideband reconfigurable antennas
… narrow band functionality into a single antenna. This concept may be useful in reducing size and to give flexibility to a wireless terminal to operate in several different modes. The approach also offers additional pre-filtering to the front-end, which reduces the interference levels at …
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Design and prototyping of a real-time millimeter wave imaging system
… plane, and also included an improved antipodal Vivaldi antenna featuring a substantial reduction in unwanted radiation as the array element. All aspects of the hardware system were simulated, prototyped and tested in this work prior to final system integration. As it relates to 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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Ultrawideband and Multi-state Reconfigurable Antennas with Sum and Difference Radiation Patterns
… a term used to describe the operation of several antenna elements working together to produce multiple different radiation patterns with the aim of improving the quality and reliability of a communications system. One useful implementation of pattern diversity considers sum and difference …
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Antennas for wireless sensor network applications
… of this thesis is to present an analysis of antennas, which are applicable to wireless sensor networks and, in particular, to the requirements of the Speckled Computing Network Consortium. This was done through a review of the scientific literature on the subject, and the design, computer …