RF Power Amplifier Patents: Who Leads, Where the Gaps Are 2026
- Filing peaked in 2017 at 153 and has declined since, with 2022's midpoint at 67 — the claim space matured early rather than accelerating.
- H03F amplifier-core claims outnumber every adjacent subclass by more than 5x, while impedance-network and antenna-integration subclasses sit under 100 records each.
- Only 10 co-assignee pairs appear across 3,480 families, showing this field is claimed almost entirely by single entities rather than joint filings.
Filing growth compares 2021 (101 records) with 2024 (55) — 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 3,480 records in scope (CR5), not by the ranked leaders only.
The state of RF power amplifier patenting
RF power amplifiers for base stations sit at the intersection of efficiency, linearity and thermal management — the search corpus behind this page pulls together 3,480 patent families filed against claims combining amplifier architecture with efficiency, linearity, digital predistortion, thermal design or back-off performance. The IPC composition is heavily skewed toward H03F (amplifiers), which touches the large majority of records, with transmission (H04B), gain control (H03G) and semiconductor device (H01L) subclasses forming the next layer of claim activity.
Filing activity rose through the early part of the tracked period, peaked in 2017 at 153 filings, and has since declined, with the 2022 midpoint at 67. That downward trend, combined with heavy concentration inside a single IPC subclass, points to a field whose foundational architecture — Doherty-style load modulation and digital predistortion — was substantially claimed in the preceding decade, leaving later entrants to compete over refinements and adjacent integration points rather than the core amplifier topology itself.
Let an AI agent run this analysis on your own technology
Pick a task. Every answer cites the patents behind it.
Filing trends and technology composition
Filing activity in this corpus peaked in 2017 and has declined through the following years; the most recent year is partial and understated because publication typically lags filing by around 18 months.
Filings rose to a 2017 peak, then declined
Annual filings climbed to 153 in 2017, the high point across the tracked period, then fell toward a 2022 midpoint of 67 and continued softening toward the most recent, still-incomplete year. This pattern reads as a maturing claim space rather than an emerging one: the core architecture was heavily claimed early, and filing volume has not returned to peak levels since.
Amplifier core claims dominate; supporting subclasses are thin
H03F (amplifiers) accounts for 3,246 of the corpus's records, dwarfing every adjacent subclass — H04B transmission at 615, H03G gain control at 271, H01L semiconductor devices at 232. Antenna (H01Q, 80) and impedance-network (H03H, 78) subclasses carry a fraction of that volume, marking them as comparatively under-claimed relative to the amplifier core itself.
Shares are the percentage of the 3,480 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on RF Power Amplifiers for Base Stations with Eureka
This page is one run against one query. Ask Eureka your own question about rf power amplifiers for base stations and every answer comes back with the patent numbers behind it.
Try EurekaThe claims that anchor this field
Digital predistortion system and method for linearizing an RF power amplifier with nonlinear gain characteristics and memory effects
A system and method of digitally predistorting a transmitter that has a digital input, up-converter, and a RF amplifier is disclosed. A digital predistorter preferably employs three paths for the digital input signal: a linear path, a memoryless digital predistortion path, and a memory based digital predistortion path. The memoryless path is preferably a look up table (LUT) of gain error corrections indexed to the input magnitude or input power. The linear path is separated to preserve the dynamic range of the system and avoid quantization associated with memoryless LUT correction. The memory based digital predistortion path filters the power envelope, or higher even order modes of the input.Filed by Intel Corporation, granted 2009-08-18 — illustrates the three-path DPD architecture that recurs across later filings in this corpus.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6043707A | Method and apparatus for operating a radio-frequency power amplifier as a variable-class linear amplifier | 657 |
| 2 | US5420536A | Linearized power amplifier | 388 |
| 3 | US20070190952A1 | Linearization of a transmit amplifier | 357 |
| 4 | US6141541A | Method, device, phone and base station for providing envelope-following for variable envelope radio frequency… | 331 |
| 5 | US6348781B1 | Buck or boost power converter | 324 |
| 6 | US20090058532A1 | Nitride semiconductor device, doherty amplifier and drain voltage controlled amplifier | 290 |
| 7 | US6566944B1 | Current modulator with dynamic amplifier impedance compensation | 273 |
| 8 | US7202734B1 | Electronically tuned power amplifier | 263 |
| 9 | US20120194274A1 | Integrated circuit, wireless communication unit and method for providing a power supply | 243 |
| 10 | US7248120B2 | Stacked transistor method and apparatus | 238 |
Citation counts favour older records within any searched corpus and should be read as a signal of influence on later filings, not of current commercial importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Put your own technology through the same analysis
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →What the filing pattern signals
The numbers behind this corpus point to a technology whose foundational architecture was claimed early and has since settled into incremental, defensively-filed refinement.
Peak filing is behind this field, not ahead of it
Annual filings climbed to 153 in 2017 and had fallen to 67 by the 2022 midpoint, with further softening in later years. That trajectory is typical of a technology where the core architecture — Doherty load modulation and digital predistortion — was heavily claimed early, leaving later filers to refine rather than pioneer.
Nearly the entire corpus sits inside one IPC subclass
H03F (amplifiers) covers the overwhelming majority of records, with H04B transmission a distant second at 615. Adjacent subclasses like H03H (filters, 78) and H01Q (antennas, 80) are comparatively empty, marking where claim density drops off sharply.
Foundational amplifier-class claims still anchor the field
The most-cited record in the corpus dates to variable-class linear amplifier operation, and the next several most-cited records are similarly early linearization patents. High citation counts here reflect decades of accumulated reference, not current filing activity.
Joint filing is rare across this corpus
Across 3,480 families, only 10 co-assignee pairs were identified, with the strongest pairings linking corporate assignees to named individual inventors rather than to other firms. That scarcity suggests most adjacent claim territory was left unclaimed rather than jointly developed and blocked.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to rf power amplifiers for base stations, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| NXP B.V. | BLEDNOV IGOR | 7 |
| RF Micro Devices, Inc. | Nokia Corporation (Finland) | 6 |
| Powerwave Technologies, Inc. | BRAITHWAITE RICHARD NEIL | 4 |
| Telefonaktiebolaget LM Ericsson | HELLBERG RICHARD | 3 |
| Motorola, Inc. | ROZENTAL MARK | 3 |
| Motorola, Inc. | KRVAVAC ENVER | 3 |
| Motorola, Inc. | GROSSMAN OVADIA | 3 |
| Motorola, Inc. | BEN AYUN MOSHE | 3 |
With only 10 co-assignee pairs across the full corpus, most filers in this field have built their claim positions independently rather than through joint development agreements.
Who is filing, and who has slowed down
Historical filing in this corpus is concentrated among established telecom-equipment and RF-semiconductor firms, but recent-year momentum shows most of the largest historical filers recording zero filings in the latest tracked year — a sign that claim positions have settled rather than that new entrants have displaced incumbents.
A concentrated top tier with a long single-filer tail
The assignee ranking behind this page shows filing concentrated among a small set of telecom-equipment and RF-semiconductor firms, with a long tail of entities holding only one or a few families each. That shape is typical of a mature claim space where early movers set the architecture and later filers work around it.
Historical leaders have gone quiet in the latest year
Several of the assignees with the deepest historical filing records, including Ericsson-linked and NXP-linked entities, show zero filings in the most recent tracked year, with some recording a full -100% year-over-year change. That pattern is consistent with a settled rather than actively contested claim space, though the most recent year is also the most affected by publication lag.
Cross-firm collaboration is rare
Only 10 co-assignee pairs were identified across the full corpus, and the strongest of them pair a corporate assignee with a named individual inventor rather than with another company. Genuine inter-firm joint filing is the exception in this field, not the pattern.
| Assignee | Recent year | YoY |
|---|---|---|
| Telefonaktiebolaget LM Ericsson | 0 | — |
| NXP B.V. | 0 | — |
| NXP USA, Inc. | 0 | -100% |
| RF Micro Devices, Inc. | 0 | — |
| Mitsubishi Electric Corporation | 0 | — |
| Ampleon Netherlands B.V. | 0 | -100% |
| Motorola, Inc. | 0 | — |
| Skyworks Solutions, Inc. | 0 | — |
Where to take this analysis
The filing pattern here raises specific follow-up questions that this page's summary data can point to but not fully answer.
Check freedom-to-operate against the foundational claims
The most-cited records in this corpus, including US6043707A and US7577211B2, anchor decades of later filing. A targeted claim comparison against your specific amplifier and predistortion architecture will show how close you sit to their scope.
Run a claim comparisonTrack recent-year momentum as new publications land
Several top historical filers show zero activity in the most recent tracked year, but that year is also the most affected by publication lag. Revisiting momentum in six to twelve months will separate genuine slowdown from reporting delay.
Monitor assignee activityScope a first claim in the under-claimed adjacent subclasses
H03H and H01Q carry a fraction of H03F's record count. Drafting a claim that ties matching-network or antenna integration directly to amplifier thermal or back-off state is worth testing against the existing art before committing resources.
Explore white spaceCommon questions about RF power amplifier patents
Filing in this corpus is concentrated among a small group of long-established telecom-equipment and semiconductor firms, with a long tail of single- or few-filing entrants behind them. Several of the largest historical filers, including Ericsson-linked and NXP-linked entities, show zero filings in the most recent tracked year, which points to a mature rather than actively expanding leadership group. Ranking details are shown in the assignee table on this page rather than repeated here, since the underlying counts change as new publications are indexed.
Digital predistortion (DPD) is a linearization technique that pre-distorts a signal digitally before amplification so that the amplifier's own nonlinear response cancels it out, improving efficiency at high back-off without sacrificing linearity. It shows up heavily in this corpus because it lets base-station amplifiers run closer to saturation — where efficiency is highest — while still meeting linearity requirements, and the highest-cited patents in the dataset, including US6043707A and US7577211B2, are built around variations of this idea. Its density in the claim space also means new filers need to check carefully how their specific implementation differs from these foundational architectures.
The clearest under-claimed areas sit in the subclasses adjacent to the amplifier core rather than inside it: impedance-matching and filter networks (H03H, 78 records) and antenna integration (H01Q, 80 records) are both thin compared with the 3,246 records in the core amplifier subclass H03F. Claims that tie tunable matching networks or antenna elements directly to real-time amplifier thermal or back-off state are not well represented yet. With only 10 recorded co-assignee pairs across the whole corpus, most existing claims were filed by single entities rather than through joint development, which is another sign that adjacent combinations were left open rather than deliberately blocked.
Filing peaked at 153 in 2017 and fell toward a 2022 midpoint of 67, continuing to soften afterward, which is consistent with a technology whose core architecture — Doherty load modulation and digital predistortion — was heavily claimed in the preceding decade. High filing density earlier in the period means the foundational claim space is occupied, not that development has stopped; incremental filings around specific implementations continue at a lower rate. Readers should also note that the most recent year in any patent trend is understated, because publication typically lags actual filing by around 18 months.
US7577211B2, assigned to Intel Corporation, covers a specific three-path digital predistortion architecture: a preserved linear path, a memoryless lookup-table correction path indexed to input magnitude or power, and a separate memory-based path that filters the power envelope or higher-order modes. It does not block digital predistortion as a general category — only that particular combination of three paths configured in that way. Implementations using a single correction path, or using analogue rather than digital correction, sit outside its claim scope, though a careful freedom-to-operate check should compare the exact path structure rather than the general technique.
Research RF Power Amplifiers for Base Stations in depth with Eureka
Go past this page: query the whole rf power amplifiers for base stations corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
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.