Terahertz Imaging: Startup Teradar aims to Revolutionize Automotive Safety
Table of Contents
A new sensor technology promises to overcome the limitations of current car safety systems, offering enhanced visibility in challenging conditions and possibly preventing accidents.
A tragic car accident years ago, where a friend struck debris on a highway in foggy and sun-glared conditions, sparked the creation of Teradar, a Boston-based startup poised to disrupt the automotive sensor market. Existing technologies like radar, lidar, and cameras each have drawbacks, notably in adverse whether. Teradar aims to combine the strengths of these technologies while mitigating their weaknesses.
Historically, terahertz frequencies have remained largely unused due to the difficulty of transmitting them over meaningful distances. Though, recent advancements in silicon transistor frequency and intense engineering efforts have made beaming terahertz radiation over hundreds of meters a reality. Teradar has successfully developed a sensor meeting the auto industry’s demanding 300-metre range requirement.
the company emerged from stealth last week, unveiling chips that it claims deliver 20 times the resolution of automotive radar, operate reliably in all weather conditions, and come at a lower cost than lidar. According to the company’s founder, the technology represents “a superset of lidar and radar combined.” Testing with major automakers is underway, with potential integration into vehicles as early as 2028, marking the frist commercial submission of this technology.
How Teradar’s System Works
Teradar’s system represents a novel architecture, blending elements of conventional radar and camera technology. Terahertz transmitters, composed of arrays of elements, generate electronically steerable beams. These beams scan the surroundings, and sensors – akin to imaging chips in a camera – measure the time and location of signal returns.Notably, Teradar’s system achieves beam steering without any moving parts.
From these signals, the system constructs a point cloud, similar to that produced by lidar. However, unlike lidar, the absence of moving parts substantially reduces cost and enhances durability, mitigating wear and tear from road conditions. “It’s a sensor that [has] the simplicity of radar and the resolution of lidar,” a company representative stated. Whether it will ultimately replace existing technologies or serve as a supplementary system remains to be steadfast by automakers, with whom Teradar is currently collaborating – five at present.
The Role of Transistor Technology
the progress achieved by Teradar is inextricably linked to advancements in silicon transistor technology, specifically the increasing maximum frequency of devices produced by modern foundries. Ruonan Han, a professor of electrical engineering at MIT specializing in terahertz electronics, confirms this connection. These improvements have boosted the efficiency, output power, and receiver sensitivity of terahertz circuits. Moreover, advancements in chip packaging have facilitated efficient radiation transmission. Combined with ongoing research in circuit and system design, these developments are expanding the application of terahertz radiation to areas like autonomous driving and safety.
Despite these strides, Han cautions that “it’s pretty challenging to deliver the performance needed for real and safe self-driving-especially the distance.” Her lab at MIT is currently focused on developing lightweight, low-power terahertz sensors for robots and drones, and has also launched Cambridge Terahertz, a startup leveraging the frequency band’s advantages in security scanning.
Beyond Automotive: expanding the Applications of Terahertz Imaging
While Teradar’s initial focus is on automotive applications, the company recognizes the potential for broader applications. the founder pointed out that, while terahertz frequencies do not penetrate skin, they can differentiate between healthy and cancerous tissue, as melanomas exhibit a distinct color at these wavelengths.
However, the immediate priority remains enhancing vehicle safety. When asked if Teradar’s technology could have prevented a recent incident involving a Waymo self-driving car and a cat named Kit Kat in san Francisco, the founder responded definitively: “it problably would have saved the cat.”
This post was corrected on 21 November 2025 to clarify the conditions of a car accident.
