A Landscape Shifted Away from Traditional Substrates
The 5G mmWave antenna substrate patent landscape is not being shaped by PTFE or ceramic material vendors—it is being shaped by printed electronics companies and ink formulators. A dataset of 78 patents and scientific publications spanning 2005 to 2023 reveals that the dominant technical approaches concentrate on graphene and 2D material inks, silver nanoparticle formulations, and solution-processable conductive systems, all of which enable antenna fabrication on flexible, low-loss substrates suited to millimeter-wave frequencies.
This landscape is significant for antenna engineers and IP strategists alike. For engineers, it signals that printable, solution-processed material systems are maturing rapidly enough to challenge conventional subtractive manufacturing for mmWave antenna fabrication. For IP strategists, the concentration of filings around graphene-based approaches—particularly the 17-family portfolio of Vorbeck Materials Corporation—means that design-around work and freedom-to-operate assessments must now engage with printed electronics IP, a domain that was largely peripheral to antenna substrate discussions five years ago.
The leading assignee, Vorbeck Materials Corporation, appears in 17 patent filings related to graphene-based printed electronics. Other significant players include Guangzhou Chinaray Optoelectronic Materials Ltd., E2IP Technologies Inc., DST Innovations Limited, and Her Majesty The Queen In Right Of Canada through the Communications Research Centre—representing a notably international field of innovation spanning North America, Europe, and China.
In millimeter-wave antenna design (typically 24–100 GHz for 5G), a low-loss substrate is a dielectric material with a minimal loss tangent (tan δ), meaning it dissipates very little electromagnetic energy. High loss tangent in a substrate directly reduces antenna gain and radiation efficiency, making substrate selection one of the primary determinants of mmWave system performance. Printed electronics approaches seek to deliver these properties on flexible, scalable platforms rather than rigid, precision-machined ceramic or PTFE boards.
According to WIPO, antenna-related patent filings in telecommunications have grown substantially alongside 5G standardisation activity, underlining the commercial urgency driving this landscape. The shift toward printable substrates documented here reflects a broader transition, validated independently by research institutions and standards bodies including IEEE, towards additive and hybrid manufacturing for high-frequency electronics.
Graphene and 2D Material Inks: Conductivity Benchmarks for mmWave
Graphene-based inks have reached conductivity levels sufficient for functional mmWave antenna operation, making them the most extensively patented approach in this dataset for high-frequency printed antenna applications. Research published in 2018 demonstrated screen-printed graphene devices achieving a conductivity of 7.13 × 10⁴ S/m using environmentally sustainable solvents including Dihydrolevoglucosenone (Cyrene), with the resulting antennas shown to be operational from MHz to tens of GHz frequencies—directly covering the sub-mmWave and mmWave 5G bands.
Screen-printed graphene ink devices have achieved an electrical conductivity of 7.13 × 10⁴ S/m using sustainable solvents, enabling wireless connectivity antennas that operate from MHz to tens of GHz frequencies, including 5G mmWave bands.
Vorbeck Materials Corporation’s patent portfolio forms the central IP infrastructure for this technology category. Their filings—active and inactive, spanning 2009 to 2020 across US, EP, WO, and IN jurisdictions—cover printed electronic devices comprising functionalized graphene sheets combined with polymeric binder materials. The compatibility of these inks with thermoplastic and thermoset polymer substrates, as well as pulp products, gives antenna designers flexibility in substrate selection based on loss tangent and mechanical requirements.
“Graphene-based inks have achieved conductivities exceeding 7 × 10⁴ S/m, enabling functional antennas operating from MHz to tens of GHz—a performance threshold that places them squarely within the 5G mmWave design envelope.”
Beyond single-material graphene inks, the research literature demonstrates fully inkjet-printed two-dimensional material field-effect heterojunctions on textile substrates (2017), combining graphene as the conductive layer with hexagonal boron nitride (h-BN) as the dielectric. This ability to print both conductor and dielectric layers using compatible solution-based processes is particularly relevant for antenna-in-package and antenna-on-substrate architectures where controlled dielectric stack properties are essential for mmWave impedance matching.
CMOS-compatible approaches using inkjet-printed MoS₂ and organic semiconductors are also advancing within this landscape, pointing toward low-voltage digital electronics integration alongside antenna structures. The convergence of 2D semiconductor printing with antenna substrate engineering suggests that future mmWave modules may integrate active and passive components within the same solution-processed stack—a capability that would significantly reduce module footprint and assembly complexity.
Search and analyse the full graphene ink and 5G mmWave antenna patent landscape in PatSnap Eureka.
Explore the Patent Landscape in PatSnap Eureka →Silver Nanoparticle Molecular Inks and Fine-Feature Antenna Traces
Silver nanoparticle inks represent the most commercially mature nanotechnology-based functional inks for antenna trace fabrication, with established supply chains and performance characteristics specifically identified as suitable for high-frequency applications. A comprehensive review published in 2016 identifies silver nanoparticle inks as having reached this commercial maturity, with the ability to fabricate conductive patterns on flexible substrates—a key requirement for conformal mmWave antennas designed to wrap around device housings or be integrated into wearable form factors.
Silver nanoparticle molecular ink formulations comprising 30–60 wt% C8–C12 silver carboxylate compounds, patented by the Communications Research Centre Canada (2019), can be sintered to form highly conductive traces without traditional sintering limitations, making them suitable for fine-feature printing in 5G mmWave antenna arrays.
The Communications Research Centre Canada has patented a distinct molecular ink approach: formulations comprising silver carboxylate compounds at 30–60 wt% concentrations using C8–C12 chain lengths. These “flake-less” compositions differ from conventional silver flake pastes in that they eliminate particle aggregation problems that can cause trace discontinuities at the fine feature sizes required for mmWave antenna element spacing. The ability to sinter these inks to form highly conductive metal traces while maintaining resolution is critical when antenna element spacing is on the order of half-wavelength at 28 or 39 GHz—dimensions in the millimeter range where printing resolution directly constrains antenna performance.
Composite ink approaches combining graphene with silver nanoparticles represent a third pathway. Research published in 2019 demonstrated all-inkjet-printed graphene-silver composite inks on textiles for highly conductive wearable electronics applications. These hybrid formulations leverage the high conductivity of silver while incorporating graphene, though the primary motivation in this published work was cost reduction through graphene incorporation rather than direct RF performance optimisation—a distinction that matters for engineers evaluating these materials specifically for mmWave loss performance.
A 2016 state-of-the-art review of silver nanoparticle ink technology identifies these materials as representing the most commercially mature nanotechnology-based functional inks, with established supply chains and performance characteristics suitable for high-frequency applications, enabling conductive pattern fabrication on flexible substrates required for conformal mmWave antenna integration.
Dielectric Control Through Printable h-BN and Substrate Selection
Controlling dielectric properties in printed antenna structures is as critical as conductor conductivity, and hexagonal boron nitride (h-BN) inks have emerged as the leading candidate for printable dielectric layers with measured, reproducible permittivity values. Research on all-2D material inkjet-printed capacitors (2018) demonstrated an areal capacitance of 2.0 ± 0.3 nF/cm² and a derived dielectric constant of 6.1 ± 1.7—a controlled permittivity range usable for impedance matching and feed network design in mmWave antenna systems.
Inkjet-printed hexagonal boron nitride (h-BN) capacitor layers have demonstrated a measured dielectric constant of 6.1 ± 1.7 and an areal capacitance of 2.0 ± 0.3 nF/cm², providing printable dielectric layers with controlled permittivity suitable for 5G mmWave antenna impedance matching and passive component integration.
The combination of graphene as a conductive ink and h-BN as a dielectric ink—both printable via inkjet within a compatible process flow—enables what researchers have termed fully-inkjet-printed two-dimensional material field-effect heterojunctions. For antenna engineers, this means that both the antenna radiating elements and the dielectric substrate function can, in principle, be deposited in a single additive manufacturing pass onto a carrier substrate, with no need for a separately manufactured dielectric board. This convergence is particularly relevant to antenna-in-package designs for 5G mmWave modules, as noted in research from Nature-published studies on 2D material electronics.
The polymer substrate landscape compatible with these inks spans thermoplastic and thermoset polymers, as documented in Vorbeck Materials Corporation’s patent filings. The selection between these substrate classes involves trade-offs between processing temperature (thermosets typically require higher cure temperatures), mechanical flexibility (thermoplastics generally offer superior flex life for conformal applications), and dielectric properties. For mmWave applications specifically, the loss tangent of the carrier polymer substrate—whether PET, polyimide, or a specialty fluoropolymer—must be characterised and controlled alongside the printed conductor and dielectric layers.
Paper-based and bio-derived substrates present an interesting counterpoint. Research on shellac-paper composites (2022) demonstrates potential as green alternatives to PET substrates. However, paper-based substrates face documented challenges for mmWave applications: moisture absorption causes dielectric constant drift, and batch variability in paper fibre composition produces dielectric non-uniformity that can shift antenna resonance frequency. Surface treatments and composite formulations may address these limitations for specific, controlled deployment scenarios, but they are not yet viable for precision mmWave antenna fabrication without significant qualification work.
Paper-based substrates for printed electronics face challenges in 5G mmWave antenna applications due to moisture absorption and dielectric variability, although shellac-paper composite research (2022) shows potential as a green alternative to PET for less demanding use cases where surface treatments can mitigate these limitations.
Map dielectric substrate patents and identify white spaces in the 5G mmWave antenna material landscape with PatSnap Eureka.
Analyse Dielectric Substrate IP in PatSnap Eureka →Patent Holders, Strategic Positions, and Emerging Printing Methods
The patent landscape reveals clearly differentiated strategic positions among the five leading assignees, with each occupying a distinct technical niche within the broader printed electronics ecosystem for mmWave antenna substrate applications. Understanding these positions is essential for R&D teams conducting freedom-to-operate analyses or identifying licensing opportunities.
Vorbeck Materials Corporation
Vorbeck holds the dominant position with at least 17 patent family members across US, EP, WO, and IN jurisdictions, spanning filings from 2009 to 2020. Their technology platform centres on functionalized graphene sheets combined with polymeric binders, with claims covering the use of multiple printing methods—a broad defensive position that encompasses the major manufacturing pathways a competitor might use to work around a single-method claim.
Guangzhou Chinaray Optoelectronic Materials Ltd.
Guangzhou Chinaray has established a complementary position focused on ink formulation chemistry: heteroaromatic-based organic solvents (2018 filing) and inorganic ester solvents (2023 filing). Their 2023 filing on printing composition and preparation method for functional material thin films is notable as the most recent patent in the dataset, suggesting continued active R&D investment in this area from the Chinese materials sector.
DST Innovations Limited and E2IP Technologies Inc.
DST Innovations Limited and E2IP Technologies Inc. are documented in the landscape with patents on printable functional materials for plastic electronics applications, including formulations specifically compatible with roll-to-roll printing. Roll-to-roll compatibility is strategically significant for mmWave antenna manufacturing at scale, as it enables high-throughput, web-based deposition of antenna arrays across large-area flexible substrates—a manufacturing approach aligned with the volume requirements of consumer 5G device production.
Emerging Printing Methods: Electrohydrodynamic Jet Printing
Academic literature reviewed in this landscape highlights electrohydrodynamic (EHD) jet printing as a high-resolution deposition method with strong relevance to fine-feature mmWave antenna fabrication. A 2021 overview of recent progress in EHD jet printing identifies this technique as capable of producing features significantly smaller than conventional inkjet printing—a capability that matters when antenna element geometries at 28 GHz and above demand sub-millimeter precision. Sustainability concerns are simultaneously driving development of bio-based substrates and green solvents, as documented in a 2023 review of sustainable inks for printed electronics covering conductive, dielectric, and piezoelectric material classes.
The overall trajectory documented across this 78-document dataset points toward a convergence: multiple printing technologies, multiple conductive ink chemistries, and multiple dielectric material options are all maturing simultaneously, lowering the barrier to entry for printed mmWave antenna fabrication while simultaneously increasing the IP complexity that new entrants must navigate. Practitioners evaluating these technologies should assess IP positions through platforms such as PatSnap’s IP intelligence tools alongside technical performance data, as the freedom-to-operate landscape is as complex as the material science itself. Standards bodies such as ITU continue to define mmWave frequency allocations that will shape which performance benchmarks matter most for commercialisation.