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Showing 1 to 5 of 5 for “"LPDA"”.
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Printed log-periodic feeds for radar applications
… first structure is a printed log-periodic array (LPDA) operating over the C, X and Ku bands. The antenna feeding structure consist of two coaxial cables, in order to realize an infinite balun which provides the required broadband input matching. The second coaxial cable mirrors the first one, …
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3D intrawall imaging using backprojection for synthetic aperture radar (SAR)
… types of antennas, a log periodic dipole array (LPDA) antenna and horn antenna. The horn antenna performed well in the experiments, producing images with minimal artefacts. On the contrary, the LPDA antenna did not perform as well in the experiments and as such the characteristics of the antenna …
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Design and synthesis of novel nanometallic catalysts and electrode materials for green fuel cells
… tested in this study: N,N'-dilactosylphenylene (LPDA), Lactose+p-aminosalicylic acid (LpAS), D-galactose+(3-amino) propylaniline (44DG), lactose-4,4-ethylenedianiline (L-44EDA), galactose-4,4-ethylenedianiline (G-44EDA) and galactose-4-sulfonyl phenyelendianiline (GPSA). Based on the intrinsic …
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Parametric Yield and Tolerance Optimisation of Electromagnetic Devices using Feature-based Non-Linear Partial Least Squares Polynomial Chaos Expansion Surrogates
… 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 to Monte …
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Design and Analysis of Circularly Polarized Electrically Small Antennas
<p>A growing need for efficient wireless communication is prevalent in the world in which we live. From cell phones to television to GPS applications, wireless communications are vital in consumer electronics and military applications. In these applications, a miniaturized antenna is sometimes …