First, let’s look at an intuitive example of steering a phased array beam. Figure 1 provides a simple illustration of a wavefront striking four antenna elements from two different directions. A time delay is applied in the receive path after each antenna element, and then all four signals are summed together.

What is a phased array antenna? A phased array antenna is an array antenna whose single radiators can be fed with different phase shifts. As a result, the common antenna pattern can be steered electronically. The electronic steering is much more flexible and requires less maintenance than the mechanical steering of the antenna.

1999年4月1日 · A model was developed to compute acoustic pressure distribution of the waves radiated from an ultrasonic linear phased array. Based on the model, beam directivity and steerability were studied for various transducer parameters such as number of elements, inter-element spacing, element width, and transducer frequency.

For phased array transducers, the maximum steering angle (at -6 dB) in a given case is derived from the beam spread equation. It can be easily seen that small elements have more beam spreading and hence higher angular energy content, which can be …

2023年7月5日 · Using this approach, we measure the radiation pattern from 5 elements of an in-house fabricated 8-element phased array antenna at the radiofrequency of 26 GHz and demonstrate continuous beam-steering over a 59 ∘ range by sweeping the optical wavelength from 1543 nm up to 1560 nm.

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.

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 while providing the ability to steer contin-

Silicon-based optical phased array (OPA) offer significant potential for high-density integration and flexible beam steering, making them highly promising for applications in miniaturized LiDAR and optical wireless communication. However, research into algorithms for efficient beam steering in OPA remains limited.

2024年12月1日 · This work presents a 2D beam steering system using a 1D optical phased array of 1D MEMS tunable grating couplers. The optical phased array steers the beam in the transverse direction by varying its progressive phased difference, β, between its …

2023年8月29日 · The speed of beam steering is demonstrated up to 3 MHz in the bulk LiNbO 3 (LN) demo, based on the fast response of the electro-optic crystal. Meantime, by demonstrating dynamic beam steering continually, its capability of continuous scanning and continually active phase tunability has been verified.