A 16-element optical phased array integrated on chip is presented for achieving two-dimensional (2D) optical beam steering. The device is fabricated on the silicon-on-insulator platform with a 250 nm silicon device layer. Steering is achieved via a combination of wavelength tuning and thermo-optic phase shifting with a switching power of P(π)=20  mW per channel. Using a silicon waveguide gratin...

In this paper, we are concerned with the performance at the media access control (MAC) layer of the protocol stack when multibeam adaptive antenna arrays are employed at the base station site. Specifically, we analyze the performance of slotted ALOHA when the base station receiver uses multibeam antenna arrays capable of steering the beams selectively on smaller sectors. The effect of different...

studied when the receiver is connected to a GAS-1 CRPA mounted on a C-12J aircraft. The signals received by the seven elements of the CRPA are fed to antenna electronics (AE) where the signals are combined based on null steering or beam forming/null steering. AE based on space-only processing, 7-tap STAP, as well as 128-bin SFAP is considered. It is shown that platform generated multipath has v...

Null steering to cancel interference at a given directions in adaptive arrays could be achieved efficiently using genetic algorithm (GA). Major deviations in the beam steering direction and large perturbation in the side lobe level could be the main limitations for placing nulls in the far field pattern. In this paper, null steering techniques for Dolph-Chebyshev and thinned antenna arrays usin...

In this paper, a 4.2–7.2 GHz (52.6%) beam-steering microstrip antenna was proposed. The proposed consists of three tapered slots and feeds. radiation directions the on plane are independent each other, feeds correspond to structures. Symmetry isolation trenches introduced improve between different ports. Radiation pattern simulation measurement show horizontal beam steering at sampled frequenci...

Nonlinear antennas combine advances in nonlinear dynamics, active antenna design, and analog microelectronics to generate beam steering and beam forming across an array of nonlinear oscillators. Nonlinear antennas exploit two phenomena typically shunned in traditional designs: nonlinear unit cells and interelement coupling. The design stems from nonlinear coupled differential equation analysis ...

The co-propagation of an intense particle beam with an ionizing laser beam in a working gas/plasma is considered. When the axes of the laser and particle beam are not aligned, then asymmetric plasma lensing results in a net dipole "eld acting on the particle beam. The particle beam can be steered or bent (as well as focused) by steering the laser. An analogy is made between the bending of the p...

The thesis describes a method of' beam steering aimed at producing a useful amount of deflection of an antenna beam from boresight, by a simple and Inexpensive method. For large antennas, It is difficult, as well as expensive, to steer the beam by more than a few beamwidths. The method studied was developed with particular reference to the beam steering requirements of Direct Broadcast Satellit...

Abstract Integrated planar lenses are critical components for analog optical information processing that enable a wide range of applications including beam steering. Conventional require gradient index control which makes their on-chip realization challenging. Here, we introduce new approach steering by designing an array coupled waveguides with segmented tails allow simultaneously achieving le...