A new conformal array designed to enhance acoustic communication on small unmanned underwater vehicles (UUVs) is presented. The array is intended to improve the reliability and rate of acoustic communication to UUVs under conditions of multipath, multiuser interference, broadband or narrowband jamming and low signal-to-noise ratio. The array elements are constructed from a piezocomposite materi...

Circular antenna array design is one of the most important electromagnetic optimization problems of current interest. The antenna must generate a pencil beam pattern in the vertical plane along with minimized side lobe level. In this paper we present non conventional method based on improved parameter of hyper beam exponent x. The circular array when implemented using hyper beam technique, ther...

Abstract Focusing on the vertical array source signal recovery method, aiming at estimation deviation caused by environment mismatch in engineering application of virtual time reversal mirror technology, this paper proposes normalized technology through theoretical derivation and analyzes performance under change signal-to-noise ratio simulation. Finally, practicability method effectiveness mod...

Acoustical array data from the Shallow Water Acoustics experiment was processed to show the feasibility of broadband mode decomposition as a preprocessing method to reduce the effective channel delay spread and concentrate received signal energy in a small number of independent channels. The data were collected by a vertical array designed at the Woods Hole Oceanographic Institution. Phase-shif...

.............................................................................................. 3 1 Theoretical Background ..................................................................... 5 1.1 What is an Active Phased Array Antenna? ............................................................... 5 1.1.1 Switched Beam Antenna ....................................................................