MIT Develops Lidar Chip With No Moving Parts and a Wide Field of View for Self-Driving Cars

On 22 July 2026, engineers at the Massachusetts Institute of Technology (MIT) unveiled a lidar-on-a-chip design that delivers a wider, sharper field of view with no moving parts. It does this with antennas of different shapes placed right next to each other without mutual interference.

What is the problem with on-chip lidar?

Lidar (light detection and ranging) measures distance by sending out laser pulses and timing their return, which builds a three-dimensional map of the surroundings. The main difficulty in moving such a sensor onto a chip is space on the die: the closer together the antennas that emit and receive light sit, the more they distort their neighbors' signals. MIT's engineers got around this by making adjacent antennas different shapes. Because their geometries differ, the antennas stop picking up and confusing each other's emissions. According to MIT, this approach sharply reduced mutual interference in tests while preserving a single narrow, precise beam.

Conventional mechanical lidars solve the same problem by brute force, using rotating mirrors and motors that physically scan the space. Such scanners are bulky, expensive and wear out over time. Moving all the optics onto a chip eliminates the moving parts, but it runs straight into the problem of interference between closely spaced antennas, which is exactly what the new MIT work addresses.

How is the beam steered without motors?

MIT's chip steers the beam with electronics rather than mechanics. The principle is similar to a phased-array antenna in radar: the phase of the signal at each antenna is adjusted so that the combined beam points in the desired direction, and it can be swept across a sector with no moving element at all. That is why it is critical that neighboring antennas do not interfere with one another; otherwise the beam blurs and loses precision. Antennas of different shapes make it possible to pack the emitters more densely while still steering a single, sharp beam across a wide field of view.

• Developer: MIT engineers
• Zero moving parts: the beam is steered by electronics, not mirrors
• Antennas of different shapes sit side by side without distorting each other's signals
• In tests: a sharp reduction in interference while keeping a single precise beam
• Target application: sensors for self-driving cars

Antennas of different shapes can be placed close together without

"mixing up" their neighbors' signals — this is how MIT's engineers describe the essence of their development.

What does this mean for self-driving cars?

A wider field of view at the same precision is a critical parameter for autonomous vehicles. Lidar builds a three-dimensional map around the car, and the wider the sector without blind spots, the sooner the system notices obstacles and the safer its decisions are at speed. A narrow field of view forces designers to mount several sensors around the car body or add mechanics, which adds cost and extra points of failure.

A solid-state design with no moving parts is also cheaper and more reliable. There is physically nothing in it to break, and mass-producing chips is fundamentally cheaper than assembling precision opto-mechanics. For automakers, this is a path to lidars that can go into mass-market models rather than only expensive research prototypes.

What this means

MIT's work removes two limitations of solid-state lidar at once: the narrow field of view and interference between antennas on the chip. If the approach scales to mass production, self-driving cars could get a wider, sharper and cheaper view of the road without fragile mechanics. It is one more step toward making reliable lidar something other than a privilege of expensive research vehicles.