Samsung Patent US12556936B2: The Fix Making 6G Smart Mirrors Real
💡 Samsung patent US12556936B2, granted February 17, 2026, solves a foundational physics problem in Reconfigurable Intelligent Surfaces (RIS): the angle-dependent phase drift that makes 6G's programmable signal mirrors unreliable at real-world incidence angles. The fix is a "dummy pattern" inserted between active unit cells. It is narrow, elegant, and potentially worth billions once 6G reaches commercial scale around 2030.
What the patent actually does
A Reconfigurable Intelligent Surface is an engineered flat panel covered with many small conducting elements called unit cells. Each unit cell contains an active conducting pattern connected to a switch, typically a PIN diode. By toggling individual switches on or off, the RIS controller programs each cell to reflect incoming radio waves with a chosen phase offset. Stack the phase offsets across hundreds or thousands of cells, and the panel steers reflected signals in any desired direction: like a flat mirror that the laws of optics never expected.
Samsung's patent US12556936B2 identifies a specific failure mode in this design. At normal incidence (waves arriving perpendicular to the panel), the switch-state contrast produces a clean 180-degree phase difference between the "on" and "off" states. But as the incidence angle increases toward 60 degrees, the phase error can reach 33 degrees. This is not a manufacturing defect or a software bug. It is a geometry problem: as waves arrive at steeper angles, the effective cross-section of each unit cell exposed to the field decreases, and the narrowing gap between adjacent cells generates unwanted parasitic capacitance that shifts the phase response.
The fix is a "dummy pattern": a passive, non-switching conducting structure placed in the previously empty space between active unit cell patterns. The dummy occupies the inter-cell gap. By filling that gap, it suppresses the parasitic capacitance that accumulates at high incidence angles. The reflection phase difference between on and off states stays consistent across the full angular range. The dummy is essentially a silent spacer that also solves an electromagnetic problem.
An angle-tolerant RIS is only useful if the infrastructure it enables is worth building, and 6G is betting everything on this technology.
The problem it solves: why angle matters in wireless
In a laboratory, radio waves arrive perpendicularly. In a street, a factory, or a shopping mall, they do not. Signals bounce off walls, come around corners, and arrive at surfaces from many directions simultaneously. For a RIS panel mounted on a building wall or ceiling, real signals will arrive at steep angles, sometimes 45 to 60 degrees from the perpendicular. A RIS that introduces a 33-degree phase error at those angles is not steering signals: it is scrambling them.
The magnitude of 33 degrees sounds abstract until you consider what it means in practice. 6G will target extremely tight latency budgets and high spatial precision, including uses like centimeter-level indoor positioning, massive MIMO systems with hundreds of antenna elements, and integrated sensing and communication (ISAC) where the same signal simultaneously transmits data and maps the environment. Any phase error in the RIS reflection degrades these use cases severely.
This explains why solving angle-dependent phase drift is not a peripheral optimization: it is a precondition for deploying RIS at scale in real environments, which means it is a precondition for 6G infrastructure as standards bodies envision it. And that shifts the discussion from engineering to patents.
What RIS means for 6G and why it is irreplaceable
6G, targeting commercial deployment around 2030, faces a physics constraint that higher frequencies only make worse. Millimeter-wave signals, already central to 5G's fastest tier, travel in near-straight lines and attenuate sharply on contact with walls, glass, or even heavy rain. Push into the terahertz band that 6G requires for its highest data rates, and the range constraint becomes extreme.
RIS offers an elegant solution: instead of adding more transmitters to cover dead zones, use the environment itself as infrastructure. A RIS panel mounted on a wall or ceiling consumes minimal power, requires no radio frequency generation, and extends coverage by re-directing signals that would otherwise be lost. For dense urban 6G deployments, factory automation, underground stations and tunnels, RIS changes the economics of coverage dramatically.
But RIS is only viable as a mass-deployment technology if the panels work reliably in real-world conditions, including off-angle signal arrival. Samsung's patent addresses this directly. Without a fix like the dummy pattern, every RIS installation must be designed with highly constrained angular geometry or accept significant performance degradation. With it, RIS panels become genuinely general-purpose signal reflectors.
What it depends on and what it could unlock
The Samsung patent sits at a specific point in a much longer technology chain. Below it, the dummy-pattern fix requires semiconductor manufacturing capable of integrating PIN diodes at millimeter scale, high-precision PCB fabrication that maintains dimensional tolerances across large surface areas, and electromagnetic simulation tools that can model parasitic effects in complex three-dimensional structures. These capabilities emerged from decades of 4G and 5G antenna development.
Above it, the value of the patent depends on standardization. Qualcomm filed RIS-related patents in 2025 specifically targeting 3GPP RACH (Random Access Channel) procedures, a signal that formal 6G standardization of RIS is approaching. If RIS enters the 3GPP standard as a defined interface, every 6G-compliant device and base station will need to support it. Patent holders with foundational unit-cell architecture claims will be positioned to license at scale.
The downstream potential is substantial: reliable wide-angle RIS enables indoor 6G coverage without new cable infrastructure, autonomous vehicle communication in occluded urban canyons, real-time sensing for smart factories, and ultimately the pervasive low-latency connectivity that makes AI inference at the edge economically viable. It is connectivity as ambient infrastructure, and RIS is the component that makes surfaces intelligent.
Who is behind it and who it threatens
Samsung Electronics Co., Ltd. is the assignee of US12556936B2. Samsung is the global leader in 6G-related patent filings, with 2,277 patents in the terahertz and next-generation wireless space as of 2022 data from Parola Analytics, more than any other single company. The competitive field also includes LG Electronics, Apple, Intel, Qualcomm, Ericsson, Nokia, Huawei, and ZTE, creating an environment where foundational sub-claims can be worth hundreds of millions in future licensing revenue.
The dummy-pattern claim is narrow enough to be sustainable and broad enough to matter. Any RIS product deployed in a real wireless environment, where signals rarely arrive perpendicularly, faces the exact angle-dependent phase problem US12556936B2 solves. A competitor either adopts Samsung's approach, develops an equivalent structural workaround, or accepts performance that falls short of real-world 6G requirements.
The geographic pressure is also significant. China accounted for 29.2% of all THz communications patent applications by jurisdiction as of 2022, the US for 28.7%, essentially tied at the top of a race that is now accelerating. For Chinese vendors including Huawei and ZTE, a Samsung patent on unit-cell architecture is not a theoretical concern: it is a design constraint affecting every product roadmap. That tension shapes the landscape the next section maps.
The 6G patent race: timing and scale
Terahertz communications patent applications grew by 340% between 2018 and 2022 alone (Parola Analytics, data year 2022), and that was before the 6G standardization race reached its current intensity. The patent landscape is evolving rapidly: Fraunhofer-Gesellschaft filed on photovoltaic-integrated, self-powered RIS panels; Dell filed on AI and machine-learning-controlled self-healing RIS; Kongju National University in South Korea filed the first known three-dimensional multi-plane RIS patent in March 2026. The technology is moving from flat passive reflectors toward three-dimensional, AI-managed, energy-autonomous surfaces.
Samsung's US12556936B2 does not cover all of these directions. It solves a specific foundational problem in the core unit cell design: angle-dependent phase drift. But foundational patents in emerging technology fields tend to become the structural layer everything else is built on. When 6G infrastructure hits commercial scale, licensing questions will start exactly where Samsung's claim does: at the unit cell.
Key facts: Samsung US12556936B2 at a glance
| Detail | Value |
|---|---|
| Patent number | US12556936B2 |
| Title | Reconfigurable intelligent surface and apparatus |
| Assignee | Samsung Electronics Co., Ltd. |
| Filing date | October 12, 2023 |
| Priority date | October 14, 2022 |
| Grant date | February 17, 2026 |
| Jurisdiction | United States |
| Core innovation | Passive "dummy patterns" between unit cells suppress angle-dependent phase errors in RIS |
| Application field | 5G / 6G wireless, reconfigurable intelligent surfaces, mmWave and terahertz communications |
So what does it mean for us?
For engineers building 6G infrastructure products, US12556936B2 is a design constraint now. Any RIS product that solves the angle-phase problem with a physically similar dummy-pattern approach must answer to this patent in the US market. The options are licensing, designing around, or proving prior art, none of them trivial.
For IP strategists, this patent illustrates a pattern common in platform technologies: the company that solves a fundamental enabling problem, even a narrow one, gains durable leverage over the entire product category. Samsung is not patenting a finished product; it is patenting a prerequisite. Once 6G standards lock in RIS as a defined technology, prerequisites become very valuable very fast.
For anyone watching the 6G race, the message is clear: competition is not just about who deploys the fastest network. It is about who holds the foundational IP on the components those networks depend on. US12556936B2 is one data point in a much larger mosaic, but it is a sharply defined one, granted in 2026, right as the 6G standardization clock is ticking loudest.
FAQ
What is a Reconfigurable Intelligent Surface (RIS)?
A Reconfigurable Intelligent Surface is a flat panel covered in small antenna elements called unit cells. Each unit cell can be switched electronically to reflect incoming radio waves with a chosen phase offset. By programming thousands of these cells simultaneously, a RIS steers reflected signals in any direction without a transmitter, essentially turning a wall or ceiling into a controllable signal mirror for 6G networks.
What is the "dummy pattern" in Samsung's patent?
A dummy pattern is a passive conducting structure placed between the active unit cells in a RIS panel. It has no switch and does not transmit or generate any signal. Its role is to fill the gap between active elements, preventing the parasitic capacitance that builds up at oblique incidence angles and causes phase errors. Think of it as a mechanical spacer that simultaneously solves an electromagnetic problem.
Why does 6G need RIS specifically?
Higher 6G frequencies, especially in the terahertz range, have very short range and cannot penetrate walls. RIS panels let operators redirect those signals around obstacles and into dead zones without installing new transmitters. This dramatically reduces the cost and complexity of dense urban 6G coverage, which is why RIS is considered a foundational enabling technology for next-generation wireless networks.
Why does patent translation matter for RIS patents like this one?
6G will be deployed globally, and patent protection is jurisdiction-specific. A US patent like US12556936B2 provides no protection in China, the EU, Japan, or South Korea unless parallel filings have been made and translated in those jurisdictions. Technical patent translation for RIS requires precise rendering of electromagnetic concepts, switching architectures, and phase measurement claims, all of which must be legally exact in each target language. Even small translation errors can invalidate claims worth billions.
When will 6G be commercially available?
Commercial 6G deployment is broadly expected around 2030, with standardization processes through 3GPP and ITU running through the late 2020s. Several companies including Samsung, Qualcomm, and Ericsson are already deploying 6G testbeds and filing foundational patents now to be positioned when the commercial window opens.
Sources
Google Patents: US12556936B2 (Samsung, 2026)
Parola Analytics: 6G Technology Patents (data 2022)
PatSnap: RIS Technology Patent Landscape 2026
About the author
Dao Huy (Lucas) is a professional translator specializing in English, Chinese, and French into Vietnamese with over seven years of experience in technical translation, patent translation, and IP translation. His work includes localizing engineering documentation, patent specifications, and intellectual property filings for technology companies entering the Vietnamese market. Patents like Samsung's US12556936B2, which describe intricate electromagnetic behaviors and claim specific spatial configurations of conducting elements, represent exactly the kind of material where a missed nuance can invalidate protection across an entire jurisdiction worth billions.
If your organization needs patent translation, technical translation, or IP translation into Vietnamese, or if you are localizing a software product or technical platform for the Vietnamese market, Lucas offers precise, field-tested translation and localization services. Request a quote at daohuy.com.
Written by Dao Huy (Lucas), Vietnamese translator & localization specialist (EN · ZH · FR → Vietnamese). See translation services →