Wide-angle beam steering using two or more variable lenses to form a small-angle beam steering element, along with a numerical aperture converter and a wide-angle lens. The small-angle beam steering element might comprise either one- or two-dimensional beam steering with tunable liquid lenses....
1) angle of beam steer 波束指向角 例句>> 2) beam-steering 波束指向 1. In order to solve the problem of pointing deviation of phased arrays caused by the quantization phase of digital phase shifters, this paper proposed zero mean phase error method and investigated how the method affects the...
A micro-optical beam steering angle magnifier, including an input light source (such as a laser), a double-convex input lens, and a double-convex output lens. The input light source emits an input light beam at a specified input angle with respect to the optical axis, toward the input ...
The beam steering angle can be changed by simply manipulating Γ. This is done by increasing the unit cell dimension to Γ = 12.6 µm. This successfully changed the angle to 14.3° which is expected from Eq. (2) (Fig. 5e–h). However, the transmission was reduced to 0.53 th...
This simple analysis enables the estimation of the steering angle of the far-field emission, which increases linearly with larger displacement Δr. For a 3-turn spiral antenna with pitch of λspp and r0 of 3 μm, the steering angle θ are calculated to be 2.7° and 6.7° for the ...
2.PARAMETERSPACEOFBEAMSTEERINGDEVICES Functionalrequirements forlaserbeamsteeringdevices cover thefollowing topics: •maximumsteeringangle, •beamdivergence/imagingcapability, •aperture/vignetting, •spectralrangeand dispersion, •throughput, •controlof thesteeringangle. Thequantitativeparametersassociatedwit...
A reconfigurable partially reflective surface (PRS) antenna with improved beam steering capability is proposed in this paper. Compared with our previous paper, the beam-steering angle can be enhanced from ±5° to ±17° with less active elements and a much smaller gain variation. It is realized...
We demonstrate an on-chip optical phased array fabricated in a CMOS compatible process with continuous, fast (100 kHz), wide-angle (51°) beam-steering suitable for applications such as low-cost LIDAR systems. The device demonstrates the largest (51°) beam-steering and beam-spacing to date ...
For beam steering, multiple adjacent LC cells can be used to improve steering angle in a dual-twist Pancharatnam phase device40, where deflection angles up to \(80^{\circ }\) can be obtained and still maintaining very high efficiency. Expanding these effects, wave front shaping and switching...
The difference in relation to previous phase-gradient works10,11,12,13,14 is that the unintended Fabry–Pérot cavity and the proximity of the radiation source and the superstrate require an optimization of the varactor values to achieve a specific steering angle. Since we do not intend to ...