Tech
Korea develops core radar components for stealth technology
The Korea Research Institute of Standards and Science has successfully localized core radar stealth technologies through indigenous development, without reliance on foreign technologies. This achievement is a significant milestone, laying the foundation for the establishment of stealth weapon systems in Korea, which have long been difficult to import due to their classification as national strategic military assets. The paper is published in the journal IEEE Transactions on Microwave Theory and Techniques.
As global military tensions rise and competition in advanced weapon development intensifies, the importance of developing stealth weapon systems has increased significantly. Radar stealth technology, which absorbs or scatters electromagnetic waves to avoid detection by enemy radar, is a key element for ensuring both autonomy and concealment in weapon systems. As this technology is classified as a strategic military asset in leading countries, its import, particularly software and testing equipment, is strictly restricted, highlighting the continuous need for domestic development.
KRISS has successfully developed both a frequency selective surface (FSS) design software and an electromagnetic wave evaluation system for radomes*—a vital component in radar stealth systems. This is the first case in which every stage of the process, from design, prototype fabrication, to performance testing, has been accomplished entirely using domestic technology, without reliance on foreign systems.
Radomes are hemispherical structures that enclose radar and communication antennas on aircraft, missiles, or other vehicles. They must be precisely designed to protect the internal systems from external environmental conditions while allowing electromagnetic signals to pass through with minimal distortion.

In defense applications, radomes are subjected to extreme conditions such as high thermal loads and intense shock during high-speed flight. As such, they must simultaneously meet multiple performance requirements, including high electromagnetic transmittance and phase stability.
The FSS in a radome functions as a type of frequency filter, designed to selectively transmit or reflect electromagnetic waves at specific frequencies. To enhance the performance of the FSS, high-performance electromagnetic simulation software is essential for accurately modeling wave transmission characteristics. However, widely used commercial software packages are associated with significant cost barriers, with licenses for individual users exceeding KRW 100 million (approx. USD 75,000) and annual maintenance fees surpassing KRW 20 million (approx. USD 15,000).
KRISS has developed new FSS design software incorporating artificial intelligence (AI) and parallel computation techniques. Optimized for analyzing radome structures composed of multilayer composite materials, the software delivers over a 50-fold increase in design speed compared to conventional tools.
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Dr. Kim Jin-Hyeok (left) and Dr. Yun Dal-Jae (right), senior researchers at KRISS, are measuring a radome using an AI-powered antenna measurement equipment. Credit: Korea Research Institute of Standards and Science (KRISS)
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Dr. Hwang In-June (left) and Dr. Jung Haewon (right) of KRISS are aligning the distance and position of an antenna for FSS measurement. Credit: Korea Research Institute of Standards and Science (KRISS)
Furthermore, KRISS has also developed an electromagnetic wave evaluation system that enables in-house performance testing and optimization of radomes. Traditionally, the process used to take over a month to complete electromagnetic tests required to meet the stringent performance standards of defense-grade radomes.
By applying artificial intelligence (AI) technology, the newly developed system enables performance measurements more than five times faster than traditional testing methods. This advancement is expected to significantly reduce both the time and cost needed to deploy radomes in operational settings.
The technology, developed through collaborative research across four KRISS research groups*, has been transferred to Korea Electrotechnology Research (KER), a company specializing in advanced defense weapon systems and precision electromagnetic measurement equipment. The technology transfer, valued at 500 million KRW, was formalized through an agreement signing ceremony held at KRISS on Tuesday, August 5.
Dr. Hong Young-Pyo, head of the Electromagnetic Wave Metrology Group at KRISS, stated, “The technologies we have developed are not only applicable to the defense sector but also hold great potential for various radar-related industries, including mobility, maritime, and aerospace applications.”
More information:
Dong-Joon Lee et al, Field-Calibrated Integrated Optical Waveguide Electro-Optic Probe With Segmented Electrode, IEEE Transactions on Microwave Theory and Techniques (2025). DOI: 10.1109/TMTT.2025.3587043
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Korea develops core radar components for stealth technology (2025, August 20)
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Tech
These Sub-$300 Hearing Aids From Lizn Have a Painful Fit
Don’t call them hearing aids. They’re hearpieces, intended as a blurring of the lines between hearing aid and earbuds—or “earpieces” in the parlance of Lizn, a Danish operation.
The company was founded in 2015, and it haltingly developed its launch product through the 2010s, only to scrap it in 2020 when, according to Lizn’s history page, the hearing aid/earbud combo idea didn’t work out. But the company is seemingly nothing if not persistent, and four years later, a new Lizn was born. The revamped Hearpieces finally made it to US shores in the last couple of weeks.
Half Domes
Photograph: Chris Null
Lizn Hearpieces are the company’s only product, and their inspiration from the pro audio world is instantly palpable. Out of the box, these look nothing like any other hearing aids on the market, with a bulbous design that, while self-contained within the ear, is far from unobtrusive—particularly if you opt for the graphite or ruby red color scheme. (I received the relatively innocuous sand-hued devices.)
At 4.58 grams per bud, they’re as heavy as they look; within the in-the-ear space, few other models are more weighty, including the Kingwell Melodia and Apple AirPods Pro 3. The units come with four sets of ear tips in different sizes; the default mediums worked well for me.
The bigger issue isn’t how the tip of the device fits into your ear, though; it’s how the rest of the unit does. Lizn Hearpieces need to be delicately twisted into the ear canal so that one edge of the unit fits snugly behind the tragus, filling the concha. My ears may be tighter than others, but I found this no easy feat, as the device is so large that I really had to work at it to wedge it into place. As you might have guessed, over time, this became rather painful, especially because the unit has no hardware controls. All functions are performed by various combinations of taps on the outside of either of the Hearpieces, and the more I smacked the side of my head, the more uncomfortable things got.
Tech
Two Thinking Machines Lab Cofounders Are Leaving to Rejoin OpenAI
Thinking Machines cofounders Barret Zoph and Luke Metz are leaving the fledgling AI lab and rejoining OpenAI, the ChatGPT-maker announced on Thursday. OpenAI’s CEO of applications, Fidji Simo, shared the news in a memo to staff Thursday afternoon.
The news was first reported on X by technology reporter Kylie Robison, who wrote that Zoph was fired for “unethical conduct.”
A source close to Thinking Machines said that Zoph had shared confidential company information with competitors. WIRED was unable to verify this information with Zoph, who did not immediately respond to WIRED’s request for comment.
Zoph told Thinking Machines CEO Mira Murati on Monday he was considering leaving, then was fired today, according to the memo from Simo. She goes on to write that OpenAI doesn’t share the same concerns about Zoph as Murati.
The personnel shake-up is a major win for OpenAI, which recently lost its VP of research, Jerry Tworek.
Another Thinking Machines Lab staffer, Sam Schoenholz, is also rejoining OpenAI, the source said.
Zoph and Metz left OpenAI in late 2024 to start Thinking Machines with Murati, who had been the ChatGPT-maker’s chief technology officer.
This is a developing story. Please check back for updates.
Tech
Tech Workers Are Condemning ICE Even as Their CEOs Stay Quiet
Since Donald Trump returned to the White House last January, the biggest names in tech have mostly fallen in line with the new regime, attending dinners with officials, heaping praise upon the administration, presenting the president with lavish gifts, and pleading for Trump’s permission to sell their products to China. It’s been mostly business as usual for Silicon Valley over the past year, even as the administration ignored a wide range of constitutional norms and attempted to slap arbitrary fees on everything from chip exports to worker visas for high-skilled immigrants employed by tech firms.
But after an ICE agent shot and killed an unarmed US citizen, Renee Nicole Good, in broad daylight in Minneapolis last week, a number of tech leaders have begun publicly speaking out about the Trump administration’s tactics. This includes prominent researchers at Google and Anthropic, who have denounced the killing as calloused and immoral. The most wealthy and powerful tech CEOs are still staying silent as ICE floods America’s streets, but now some researchers and engineers working for them have chosen to break rank.
More than 150 tech workers have so far signed a petition asking for their company CEOs to call the White House, demand that ICE leave US cities, and speak out publicly against the agency’s recent violence. Anne Diemer, a human resources consultant and former Stripe employee who organized the petition, says that workers at Meta, Google, Amazon, OpenAI, TikTok, Spotify, Salesforce, Linkedin, and Rippling are among those who have signed. The group plans to make the list public once they reach 200 signatories.
“I think so many tech folks have felt like they can’t speak up,” Diemer told WIRED. “I want tech leaders to call the country’s leaders and condemn ICE’s actions, but even if this helps people find their people and take a small part in fighting fascism, then that’s cool, too.”
Nikhil Thorat, an engineer at Anthropic, said in a lengthy post on X that Good’s killing had “stirred something” in him. “A mother was gunned down in the street by ICE, and the government doesn’t even have the decency to perform a scripted condolence,” he wrote. Thorat added that the moral foundation of modern society is “infected, and is festering,” and the country is living through a “cosplay” of Nazi Germany, a time when people also stayed silent out of fear.
Jonathan Frankle, chief AI scientist at Databricks, added a “+1” to Thorat’s post. Shrisha Radhakrishna, chief technology and chief product officer of real estate platform Opendoor, replied that what happened to Good is “not normal. It’s immoral. The speed at which the administration is moving to dehumanize a mother is terrifying.” Other users who identified themselves as employees at OpenAI and Anthropic also responded in support of Thorat.
Shortly after Good was shot, Jeff Dean, an early Google employee and University of Minnesota graduate who is now the chief scientist at Google DeepMind and Google Research, began re-sharing posts with his 400,000 X followers criticizing the Trump administration’s immigration tactics, including one outlining circumstances in which deadly force isn’t justified for police officers interacting with moving vehicles.
He then weighed in himself. “This is completely not okay, and we can’t become numb to repeated instances of illegal and unconstitutional action by government agencies,” Dean wrote in an X post on January 10. “The recent days have been horrific.” He linked to a video of a teenager—identified as a US citizen—being violently arrested at a Target in Richfield, Minnesota.
In response to US Vice President JD Vance’s assertion on X that Good was trying to run over the ICE agent with her vehicle, Aaron Levie, the CEO of the cloud storage company Box, replied, “Why is he shooting after he’s fully out of harm’s way (2nd and 3rd shot)? Why doesn’t he just move away from the vehicle instead of standing in front of it?” He added a screenshot of a Justice Department webpage outlining best practices for law enforcement officers interacting with suspects in moving vehicles.
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