SAR Payload Patents: Top Companies & Filing Trends 2026
- 22.8% concentration at the top. The five leading assignees together hold 619 of 2,715 records in scope — dense but not a monopoly, with a long tail of single- and few-filing entrants behind them.
- Filing cooled after a 2022 peak. Activity ran from 133 records in 2021 to 92 in 2024, a -31% move over that span, after a high of 151 records in 2022.
- G01S dominates, almost everything else is secondary. 86.2% of records carry a G01S radar/positioning class; the next largest class, G06T image processing, appears in just 5.2%.
Filing growth compares 2021 (133 records) with 2024 (92) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 2,715 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Synthetic aperture radar payload patents cover the hardware and signal-processing chain that turns a moving radar platform into a high-resolution imaging system: antenna panels, waveform generation, azimuth ambiguity suppression, range compression, polarimetric channel isolation and the calibration routines that keep an antenna pattern stable in orbit or in flight. The search underlying this page combines SAR-specific hardware terms with the processing techniques that define payload performance, so it captures both the RF front end and the onboard or ground-side signal chain that makes the imagery usable. 2,715 records fall within scope across the 2015 to 2026 window.
Because publication trails filing by roughly 18 months, the last one to two years in any trend understate real activity — treat 2025 and 2026 as still filling in rather than as evidence of a slowdown.
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Filing trend and technology composition
Two views of the same 2,715-record corpus: how filing volume has moved year on year, and how records distribute across IPC subclasses. Because a single record can carry several IPC codes, the class shares below sum to more than 100% of records.
Filing trend, 2017-2026
Recorded filings ran from 69 in 2017 to a peak of 151 in 2022, then eased toward 92 by 2024 (a -31% move from 2021's 133) before the still-incomplete 2025-2026 years, which will fill in further as publication catches up.
IPC subclass composition
G01S (radar, sonar and positioning) sits under 86.2% of all records, confirming this corpus is anchored in core radar signal processing rather than adjacent imaging or antenna disciplines. G06T image processing (5.2%), G06F data processing (5.0%), H01Q antennas (4.6%), G06K data recognition (4.5%), G02B optics (3.6%), H01S lasers (3.1%) and G06C computing (2.8%) each touch a meaningfully smaller slice, marking them as secondary or supporting claim areas rather than the corpus's centre of gravity.
Shares are the percentage of the 2,715 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Synthetic Aperture Radar Payloads with Eureka
This page is one run against one query. Ask Eureka your own question about synthetic aperture radar payloads and every answer comes back with the patent numbers behind it.
Try EurekaA representative early claim
Method for resolving ambiguity in the determination of antenna angle of view and Doppler frequency in synthetic aperture radar
The method resolves pulse repetition frequency ambiguity in SAR by evaluating how Doppler frequency depends on transmitting frequency. Radar data undergo a range Fourier transformation, and a Doppler centroid estimator determines, for each range frequency, the Doppler centroid in the azimuth direction from any skew in the two-dimensional Fourier power spectrum or autocorrelation function — resolving antenna angle-of-view and Doppler ambiguity without extra demands on the data itself.Filed by Deutsche Forschungsanstalt für Luft- und Raumfahrt, granted 1994-04-26.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20070083114A1 | Systems and methods for image resolution enhancement | 479 |
| 2 | US9229102B1 | Detection of movable objects | 314 |
| 3 | US20150301167A1 | Detection of movable objects | 288 |
| 4 | US6400306B1 | Multi-channel moving target radar detection and imaging apparatus and method | 275 |
| 5 | US7443334B2 | Collision alerting and avoidance system | 263 |
| 6 | US20080055149A1 | Ground-based collision alerting and avoidance system | 252 |
| 7 | US5245347A | All weather tactical strike system (AWTSS) and method of operation | 239 |
| 8 | US20140347213A1 | Method and System for Estimation and Extraction of Interference Noise from Signals | 218 |
| 9 | US20030161411A1 | Ultra wide bandwidth communications method and system | 214 |
| 10 | US5835054A | Ultra wideband ground penetrating radar imaging of heterogeneous solids | 212 |
Citation counts favour older filings simply because they have had longer to accumulate citations inside this corpus — read them as a signal of influence on later work, not as a ranking of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the data implies for filing strategy
Three patterns worth acting on before drafting new claims in this space.
Leadership is real but not exclusive
The top five assignees hold 619 of 2,715 records — a meaningful concentration, but with 77.2% of the field still held outside that group. New entrants are not filing into a closed space; they are filing into a crowded one with room at the edges.
Post-peak cooling, not collapse
Filing activity peaked at 151 records in 2022 and eased to 92 by 2024. That decline sits within the range of a maturing filing wave rather than an exit — and the 2025-2026 figures are still incomplete due to publication lag.
Core radar processing is heavily claimed
Nearly nine in ten records touch G01S. Adjacent classes — image processing, antennas, optics — appear far less often, which is where narrower, less contested claim language is more likely to be available.
Filing offices split across four regions
The United States leads receiving-office volume, with China, the EPO and Japan each holding substantial shares and WIPO PCT and Canada filings behind them — a genuinely multi-jurisdictional filing pattern rather than a single dominant venue.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to synthetic aperture radar payloads, with the prior art for and against each one.
Who is filing, and where activity is shifting
The ranked leaders span defence primes, national research institutes and commercial SAR operators. Recent-year momentum figures should be read against the publication-lag caveat: a 0-in-latest-year reading often reflects filings still working through the pipeline, not withdrawal from the field.
A single leader, then a graded field
The top-ranked assignee holds 152 records against a fifth-place figure of 94 and a tenth-place figure of 67 — a graded drop-off rather than a sharp cliff, consistent with several organisations sustaining parallel SAR payload programmes.
Co-filing is rare and mostly bilateral
Only ten co-assignee pairs appear across the corpus, each pairing at most two joint filings. Most SAR payload IP in this dataset is filed by a single organisation rather than through formal joint development structures.
Recent-year counts are small and volatile
Even active recent filers show small absolute counts in the latest year — a leading Chinese research institute recorded 4 filings, down 33% year on year — a reminder that year-on-year swings at this scale reflect publication timing as much as strategic change.
| Assignee | Recent year | YoY |
|---|---|---|
| Aerospace Information Research Institute, Chinese Academy of Sciences | 4 | -33% |
| German Aerospace Center (DLR) | 0 | -100% |
| Raytheon Co. | 0 | — |
| Mitsubishi Electric Corp. | 0 | — |
| Institute of Electronics, Chinese Academy of Sciences | 0 | — |
| ICEYE Oy | 0 | -100% |
| Metrologic Instruments Inc. | 0 | — |
| Thales Alenia Space Italia S.p.A. | 0 | — |
Where to take this analysis
This page maps where SAR payload filing activity sits today. Turning that into a filing or freedom-to-operate decision means going deeper on specific claim language and specific assignees.
Map claims against the G01S core
With 86.2% of records touching G01S, a narrower search inside that subclass against your specific waveform or antenna approach will show real claim density rather than field-wide averages.
Explore in Eureka →Check the under-claimed branches
Polarimetric isolation and calibration routines show materially lower filing density than the core — worth a targeted prior-art check before drafting there.
Run a white space search →Track the graded leadership
The drop from leader to fifth to tenth place is gradual, not a cliff — worth monitoring which of these organisations is actively renewing filings versus letting programmes lapse.
Set up assignee monitoring →Common questions on SAR payload patents
The ranking in this dataset covers 100 assignees drawn from 2,715 records, with the leading organisation holding 152 records. The field is not a monopoly: the top five assignees combined hold 619 records, or 22.8% of all records in scope, which leaves the large majority of filings spread across a long tail of national research institutes, defence primes and commercial SAR operators. Anyone assessing freedom to operate should look at the specific claim language of the leaders rather than assume blanket coverage from a single filer.
Filing activity rose to a peak of 151 records in 2022, then eased to 92 records by 2024, a -31% move from 2021's 133 records over that three-year span. That is the most reliable read available because 2024 is the most recent year with largely complete publication data. Figures for 2025 and 2026 will look lower simply because publication lags filing by roughly 18 months, so they should not be read as a continuing decline until later data fills in.
US5307070A is a 1994 filing from Deutsche Forschungsanstalt für Luft- und Raumfahrt describing a method for resolving pulse repetition frequency ambiguity by measuring the skew of the two-dimensional Fourier power spectrum or autocorrelation function of range-transformed radar data, then estimating the Doppler centroid per range frequency in the azimuth direction. It is a foundational technique for Doppler centroid estimation without imposing extra demands on the input data. Later filings addressing azimuth ambiguity suppression in SAR payloads should be checked against this method's specific Fourier-domain approach before assuming a design is clear of it.
G01S, covering radar, sonar and positioning, appears in 86.2% of the 2,715 records in scope, making it by far the dominant classification for this corpus. Secondary classes include G06T image data processing at 5.2%, G06F electric digital data processing at 5.0%, H01Q antennas at 4.6%, G06K data recognition at 4.5%, G02B optics at 3.6%, H01S lasers at 3.1% and G06C computing at 2.8%. Because a single record often carries several IPC codes, these shares add up to more than 100% of records and should not be read as mutually exclusive categories.
Relative to the 86.2% density in the core G01S radar class, sub-areas like polarimetric channel isolation hardware, antenna pattern calibration routines and block adaptive quantization schemes show materially lighter filing activity in this dataset. That does not guarantee an open field — it means fewer records surface under those specific terms within this search, so a targeted prior-art search on the exact claim language is still necessary before relying on it as white space. Onboard fusion of optical and radar data is another area worth checking given its low overlap with the dominant G01S class.
Among receiving offices in this dataset, the United States leads with 819 filings, followed by China at 388, the European Patent Office at 371, Japan at 212, WIPO's PCT route at 178 and Canada at 156. This spread indicates SAR payload IP is actively filed across multiple major jurisdictions rather than concentrated in one venue, which matters for anyone planning a multi-region filing or clearance strategy.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.