A multitask convolutional neural network (CNN) is trained to localize the instantaneous position of a motorboat throughout its transit past wide aperture linear array hydrophones located 1 m above sea floor in water 20 deep. cepstrogram database for each hydrophone and cross-correlogram pair adjacent are compiled multiple transits. Cepstrum-based correlation-based feature vectors (along with gr...

The conventional series-fed endfire dipole antenna has a wide impedance bandwidth and is inexpensive to manufacture. However, it disadvantage: its size large because of the inter-dipole spacing, which required satisfy condition for good radiation characteristics. Here, we propose two-dipole with reduced size. miniaturized was designed using meander line reduce interdipole spacing while ensuring...

The uncertainty behavior of an enhanced three-dimensional (3D) localization scheme for pulsed sources based on relative travel times at a large-aperture three-hydrophone array is studied. extension two-hydrophone approach time differences between direct and surface-reflected arrivals, with significant advantages, but also drawbacks, such as left-right ambiguity, high range/depth uncertainties b...

A double-side radiating leaky-wave antenna based on composite right/left-handed (CRLH) coplanar-waveguide (CPW) is proposed. Dispersion diagram of the unit cell is investigated, and balanced property is confirmed. Thus, the CRLH leaky-wave antenna can have backfire radiation due to the left-handed property of the CRLH structure and broadside radiation at the balancing frequency point. The measu...

In this paper, a wideband bidirectional endfire circularly polarized (CP) antenna is proposed by combining two CP antennas with single coaxial probe feed. The characteristics are achieved the help of two-layered substrate separated an air gap, and excitation waves in directions yielded magnetic dipoles tapered electric dipoles. has shown wide 10-dB impedance bandwidth (IBW) 3-dB axial ratio (AR...

In this paper, we propose a novel Half Mode Substrate Integrated Coaxial Line (HMSICL) cavity fed monopole antenna at 28 GHz. A SICL is bisected along its symmetric magnetic wall (PMC) to create an open-ended cavity. The proposed HMSICL used excite tapered radiate in endfire direction with gain of 6.4 dBi For dual beam application, it integrated unidirectional broadside Waveguide (HMSIW) exhibi...

Recent work has shown that endfire beamforming of ocean noise can be used to produce images of the seabed layering [Siderius et al., J. Acoust. Soc. Am. 120, 1315-1323 (2006)]. This initial noise imaging technique used conventional beamforming and was later extended to adaptive beamforming that is theoretically optimal. However, there can be problems with adaptive methods, which include extreme...

Metamaterials are a new class of ordered composites that exhibit exceptional electromagnetic properties not readily observed in nature. In particular, artificial materials with both negative permittivity and permeability have attracted widespread interest in recent years. These composites are constructed from an array of metallic in dielectric and magnetic substrates and exhibit unusual electro...