While major manufacturers dominate the mainstream RF absorber market, specialized applications—such as R&D and use in unique environments—often require customized specifications and small-batch support. In these cases, niche manufacturers with greater flexibility are increasingly being chosen.
Here, we highlight manufacturers that focus on these specialized needs.
| Frequency Range |
|---|
| 3GHz-320GHz |
| Material |
| Urethane foam |
| Key Features |
| Up to 50 dB of absorption |
At just 550g per panel—approximately half the weight of competing products (*1)—this polyurethane foam absorber covers a wide frequency range from 3 to 320 GHz.
Delivers 50 dB absorption, outperforming conventional heavy ferrites.
Velcro-backed for rapid mounting, ideal for temporary setups and cost-effective maintenance.
| Frequency Range |
|---|
| 20MHz-3GHz |
| Material |
| Elastomer |
| Key Features |
| Permeability (at 1 MHz): 150 |
Heat-resistant elastomer: Designed for direct SMT processing and high-temperature durability.
Ultra-thin (from 0.1 mm) for high-density integration with robust EMI suppression.
It significantly reduces assembly workload and enables EMI countermeasures without altering the existing manufacturing process.
| Frequency Range |
|---|
| 1-35 GHz |
| Material |
| Elastomer |
| Key Features |
| Reflection Performance: –20 dB |
Frequency-tuned for specific radar absorption, offering superior stealth performance over standard RF sheets (*2).
Millimeter-thin design delivers –20 dB reflection, ensuring high absorption while preserving aerodynamic integrity.
Excellent conformance to complex geometries with thermal stability from –60°C to 150°C—ideal for aerospace platforms.
This broadband, pyramid-type absorber supports millimeter-wave testing across a wide frequency range from 3 GHz to 320 GHz. It maintains high absorption of approximately 50 dB even at 320 GHz, making it ideal for high-frequency testing in applications such as 5G/6G, autonomous driving radar, and satellite communications.
Treated with a flame-retardant solution and a specialized coating, it achieves both light weight and fire resistance, enhancing safety and durability.
| Frequency Range | 3GHz-320GHz | Absorption Performance | Up to 50 dB |
|---|---|---|---|
| Material | Urethane Foam | Angular Performance | Not specified |
| Flame Retardant Grade | UL 94 HBF | Dimensions | 61×61cm |
| Weight (kg) | 0.55 |
| Frequency Range |
|---|
| 200 MHz – 110 GHz |
| Absorption Performance |
| 30 dB to 50 dB |
| Dimensions |
| 61 × 61 cm |
| Weight (kg) |
| 1.3 – 8.1 |
Delivers up to 50 dB absorption across a wide frequency range of 200 MHz to 110 GHz. Covers everything from telecommunications equipment to in-vehicle devices, providing a stable testing environment required for research and evaluation applications.
| Frequency Range |
|---|
| 1 GHz - 76.5 GHz |
| Absorption Performance |
| Up to 20 dB |
| Dimensions |
| 30.5 × 30.5 cm |
| Weight (kg/㎡) |
| 3.2 – 22.5 |
Ideal for thin-profile needs without broadband requirements. Applications include antenna supports, ship masts, outdoor structures to suppress reflections, and lining for radar nacelles or high-power magnetron cases.
| Frequency Range |
|---|
| Above 1 GHz |
| Power Handling |
| ≥ 1 W/cm² |
| Dimensions |
| HP-3: 7.5 × 7.5 × 7.5 cm HP-26: 20 × 20 × 66 cm |
| Weight |
| HP-3: 130 g/unit HP-26: 3.1 kg/unit |
Lightweight structure using inorganic microspheres offers stable performance at high temperatures with no risk of combustion. Supports high-power, wideband testing without forced cooling, making it ideal for radar evaluation and EMC anechoic chambers.
| Company Name | Microwave Factory Co.,Ltd. |
|---|---|
| Head Office Address | 7F, Shin-Yokohama KS Building 3-18-3 Shin-Yokohama, Kohoku-ku Yokohama, Kanagawa 222-0033 Japan |
| Phone Number | (+1) 408-520-4550 |
| Official Website | https://www.mwf.co.jp/en/ |
This silicone-based absorber sheet has a thickness of just 0.1–0.5 mm and fits tight spaces such as under shielding cans or directly on ICs—ideal for high-density electronic devices like smartphone modules and automotive ECUs.
The reflow-compatible design supports integration into SMT (Surface Mount Technology) production lines without additional steps.
It effectively absorbs unwanted emissions around ICs and CPUs, contributing to more stable communication and data processing.
| Frequency Range | 20MHz-3GHz | Absorption Performance | Not specified |
|---|---|---|---|
| Material | Elastomer | Angular Performance | Not specified |
| Flame Retardant Grade | 94 V-0 (under certification) | Dimensions | 29.5×21cm |
| Weight (kg) | Not specified |
| Frequency Range |
|---|
| 10 MHz – 4 GHz |
| Absorption Performance |
| Not specified |
| Dimensions |
| Approx. 30.5 × 30.5 cm |
| Weight (kg) |
| Not specified |
This high-permeability, silicon-based elastomer absorber is designed for high-temperature environments. Its flexible and installation-friendly structure makes it ideal for absorbing low-frequency EMI noise. It effectively suppresses radiated noise, crosstalk, and resonance from CPUs, ICs, and circuit boards.
| Frequency Range |
|---|
| 800 MHz – 6 GHz |
| Absorption Performance |
| 85 dB/cm at 6 GHz |
| Dimensions |
| Approx. 30.5 × 30.5 cm, Thickness: 0.025 cm – 0.3 cm |
| Weight (kg) |
| Not specified |
This thin, lightweight microwave absorber offers excellent corrosion resistance. It is highly effective at suppressing cavity resonance and surface currents, and also helps reduce antenna-to-antenna interference and reflected noise. Widely used across aerospace, defense, automotive, and consumer electronics applications.
| Frequency Range |
|---|
| 18 GHz – 35 GHz |
| Absorption Performance |
| 80 dB/cm at 20 GHz |
| Dimensions |
| Approx. 30.5 × 30.5 cm,Thickness: 0.076 cm |
| Weight (kg) |
| Not specified |
A thin, flexible, high-loss silicone rubber absorber designed for high-frequency applications. With high dielectric and magnetic permeability, it delivers stable performance even in high-altitude environments. Suitable for satellite communications, radar systems, and aerospace or optical equipment.
| Company Name | Laird Technologies |
|---|---|
| Head Office Address | 16401 Swingley Ridge Rd #700, Chesterfield, MO 63017, USA |
| Phone Number | (+1) 636-898-6000 |
| Official Website | https://www.laird.com/ |
Delivers excellent RF absorption across a wide frequency range from 1 to 35 GHz. Offers superior weather and heat resistance, adhering well to metal and composite surfaces to effectively suppress reflected waves.
Its thin, lightweight structure conforms to complex shapes such as aircraft and ships, maintaining stable performance over extended periods.
| Frequency Range | 20MHz-3GHz | Absorption Performance | Not specified |
|---|---|---|---|
| Material | Low-density polyurethane foam (SFC), carbon (metal powder), etc. | Angular Performance | Not specified |
| Flame Retardant Grade | Not specified | Dimensions | Not specified |
| Weight (kg) | For C-RAM CFA-19: Approx. 0.57 kg per sheet (based on 61 × 61 cm size) |
| Frequency Range |
|---|
| Approx. 0.12 – 18 GHz |
| Absorption Performance |
| Up to 45 dB (varies by frequency) |
| Dimensions |
| Approx. 60 × 60 cm square panel, height up to approx. 183 cm |
| Weight (kg) |
| Approx. 1.0kg / 7.2kg |
A flat-type absorber made from a polyurethane foam base dispersed with conductive carbon or metal powder. It achieves a reflection loss of approximately –20 dB in the microwave to millimeter-wave range, and is used for reducing surface reflections on structural components.
| Frequency Range |
|---|
| Approx. 0.08 GHz – 50 GHz |
| Absorption Performance |
| Up to 60 dB (varies by frequency and grade) |
| Dimensions |
| Approx. 60 × 60 cm square panels (Twisted type for models SFC-72 and above) Height: approx. 7.6 cm to 244 cm |
| Weight (kg) |
| Not specified |
Pyramid-shaped RF absorbers commonly used in anechoic chambers and RCS measurement facilities. Made from low-density polyurethane foam impregnated with conductive carbon, they deliver wideband absorption across the 2–40 GHz range.
| Frequency Range |
|---|
| 2 GHz – 40 GHz (varies by thickness) |
| Absorption Performance |
| ≥ –12 dB at 0.375 inch thickness |
| Dimensions |
| 24 × 24 in (61 × 61 cm) 24 × 48 in (61 × 120 cm) |
| Weight (kg) |
| Not specified |
This thin, high-loss laminated absorber is designed for RCS control of aircraft exteriors, antenna fairings, and naval structures. By balancing dielectric and magnetic loss, it delivers stable absorption performance even at wide incidence angles.
| Company Name | PPG Industries, Inc. |
|---|---|
| Head Office Address | One PPG Place, 40 East, Pittsburgh, Pennsylvania 15272, USA |
| Phone Number | (+1) 412-434-3131 |
| Official Website | https://www.ppg.com/en-US |
E&C Anechoic Chambers is a Belgium-based manufacturer of anechoic chambers and RF absorbers, supplying products to EMC test laboratories and research institutions worldwide. The company is known for its high-performance absorbers and custom-designed chamber solutions.
A high-performance pyramidal absorber covering a wide frequency range from 100 MHz to 500 GHz. Made from flame-retardant polyurethane foam impregnated with conductive carbon, it offers both high absorption efficiency and durability. Suitable for high-frequency testing such as 5G, radar, and EMC.
A hybrid absorber combining ferrite tiles and conductive foam, supporting frequencies from 30 MHz to 40 GHz. Provides stable absorption across both low and high frequencies, ideal for EMC and military electromagnetic environment testing.
A flexible, flat microwave absorber that operates across 100 MHz to 40 GHz. Its form allows easy installation on curved or corner surfaces where pyramidal absorbers are difficult to place—ideal for chamber corner treatment, doors, and joints.
Based in Texas, USA, ETS-Lindgren is a global leader in electromagnetic solutions for EMC testing, wireless communications, and medical applications. Renowned for its advanced technology and extensive experience in test facility design.
Covers a broad range from 30 MHz to 100 GHz. Constructed with high-quality polyurethane foam impregnated with conductive carbon, it effectively reduces reflections in anechoic chambers and antenna measurement setups.
Designed with a curved shape to deliver high absorption from around 300 MHz without requiring ferrite tiles. Ideal for use on rear walls in antenna measurement chambers, offering broadband performance.
A millimeter-wave absorber for high-frequency ranges from 1 GHz to 110 GHz, maintaining stable performance even under oblique incidence. Its non-hygroscopic base and unique geometry reduce the impact of humidity and angle, making it suitable for precision testing and compact chambers.
A Texas-based subsidiary of the TDK Group, TDK RF Solutions is an engineering company specializing in EMC and RF technologies. The company provides complete solutions from design to deployment, including anechoic chambers, absorbers, antennas, test systems, and control software. Its products are widely adopted in telecommunications, automotive, aerospace, and industrial sectors.
Tile-type absorbers made with high-density ferrite, offering excellent absorption performance in low-frequency bands while remaining compact and weather-resistant.
Combines magnetic materials with expanded polystyrene to provide broadband absorption from as low as 30 MHz. Flame-retardant and moisture-resistant, ensuring long-term stability.
Polyethylene foam containing conductive carbon, supporting an ultra-wide frequency range of 0.8 to 110 GHz. Lightweight and flexible, suitable for high-frequency testing environments.
The company supports 5G/6G and autonomous driving development through design, manufacturing, and testing services including prototyping, simulations, and anechoic chamber support.
| Location | 7F, Shin-Yokohama KS Building 3-18-3 Shin-Yokohama, Kohoku-ku Yokohama, Kanagawa 222-0033 Japan |
|---|---|
| Phone Number | (+1) 408-520-4550 |
| Official Website | https://www.mwf.co.jp/en/ |
| Frequency Range | 200MHz-110GHz |
|---|---|
| Absorption Performance | 30dB-50dB |
| Dimensions | Approx. 61×61 cm, height 11–114 cm |
| Weight (kg) | 1.3–8.1 |
A specialized RF absorber manufacturer offering key products such as injection-molded absorbers for millimeter waves and panels for UHF RFID applications.
| Location | 5-4-5 Asakusabashi, Taitou-ku, Tokyo 111-0053 JAPAN |
|---|---|
| Phone Number | +81-03-5825-1255 |
| Official Website | https://mwa.co.jp/en/ |
| Frequency Range | 2.45GHz~76.5GHz |
|---|---|
| Dimensions | 20cm×20cm |
| Absorption Performance | Not specified |
| Weight (kg) | Not specified |
Provides high-performance RF absorbers for precision and telecom devices requiring high-density integration. Offers custom designs with varying thicknesses, shapes, and frequency characteristics, including ultra-thin sheets.
| Location | 16401 Swingley Ridge Rd #700, Chesterfield, MO 63017, USA |
|---|---|
| Phone Number | (+1) 636-898-6000 |
| Official Website | https://www.laird.com/ |
| Frequency Range | 10MHz-4GHz |
|---|---|
| Absorption Performance | ≥ 50 dB/cm at 2.5 GHz |
| Dimensions | Approx. 30.5 × 30.5 cm, thickness 0.5–3.18 mm |
| Weight (kg) | Approx. 56 g and up |
Offers a wide range of RF absorbers—including pyramidal, honeycomb, foam, and elastomer types—covering diverse frequency ranges and applications.
| Location | One PPG Place, Pittsburgh, PA 15272, U.S.A |
|---|---|
| Phone Number | Not specified |
| Official Website | https://www.ppg.com/en-US |
| Frequency Range | Approx. 0.12 – 18 GHz |
|---|---|
| Absorption Performance | Up to 45 dB (varies by frequency) |
| Dimensions | Approx. 60 × 60 cm square panel, maximum height approx. 183 cm |
| Weight (kg) | Approx. 1.0 kg / 7.2 kg |
Offers a wide range of RF absorbers—including pyramidal, honeycomb, foam, and elastomer types—covering diverse frequency ranges and applications.
| Location | 1301 Arrow Point Drive, Cedar Park, Texas 78613, USA |
|---|---|
| Phone Number | (+1) 512-531-6400 |
| Official Website | https://www.ets-lindgren.com/ |
| Frequency Range | 30 MHz – 100 GHz |
|---|---|
| Absorption Performance | 11 – 50 dB |
| Dimensions | Approx. 60 × 60 cm, pyramid height approx. 6.4–152.4 cm |
| Weight (kg) | 1–15.9 kg |
Offers a wide range of RF absorbers—including pyramidal, honeycomb, foam, and elastomer types—covering diverse frequency ranges and applications.
| Location | 450 Franklin Gateway SE, Suite 100, Marietta, GA 30067, United States |
|---|---|
| Phone Number | (+1) 678-797-9172 |
| Official Website | https://www.mvg-world.com/en-US |
| Frequency Range | 30MHz~40GHz |
|---|---|
| Absorption Performance | Up to 32 dB (varies by frequency) |
| Dimensions | Standard 60cm×60cm, height 30~75cm |
| Weight (kg) | Approx. 1.9kg~5.3kg |
Production is carried out at strictly quality-controlled facilities in Japan and overseas. The company also offers comprehensive technical support, including anechoic chamber design and construction assistance, and a 20-year warranty.
| Location | 1101 Cypress Creek Rd. Cedar Park, Texas 78613 USA |
|---|---|
| Phone Number | (+1) 512-258-9478 |
| Official Website | https://www.tdkrfsolutions.tdk.com/ |
| Frequency Range | Approx. 30 MHz – 1 GHz |
|---|---|
| Absorption Performance | Approx. 10 – 20 dB (varies by frequency) |
| Dimensions | 10 × 10 × approx. 0.55 cm |
| Weight (kg) | Approx. 270 g/piece |
Provides highly reliable RF absorbers with wideband absorption, high power handling, flame retardancy, and compliance with REACH and RoHS. Quality is ensured through ISO 9001-compliant batch control and both in-house and external testing.
| Location | Nijverheidsstraat 7A, B-2260 Westerlo Belgium |
|---|---|
| Phone Number | (+32) 14-59-58-00 |
| Official Website | https://www.ecanechoicchambers.com/index.html |
| Frequency Range | 100 MHz and up |
|---|---|
| Absorption Performance | 18 – 55 dB |
| Dimensions | 61cm×61cm |
| Weight (kg) | 1.3 – 10.5 kg |
Uses materials such as carbon-coated polyurethane foam to offer broadband-compatible RF absorbers. In addition to standard products, custom solutions for specific frequencies are also available.
| Location | 12420 Race Track Rd, Tampa, Florida 33626, USA |
|---|---|
| Phone Number | (+1) 813-855-6921 |
| Official Website | https://leadertechinc.com/ |
| Frequency Range | 1GHz~18GHz |
|---|---|
| Absorption Performance | 20dB~30dB |
| Dimensions | 12 × 12 inches / 24 × 24 inches |
| Weight (kg) | Not specified |
Offers RF absorbers made from magnetic epoxy resin and silicone rubber, suitable for coating or cutting to fit complex shapes. Features include strong adhesion, low outgassing, heat resistance, and flame retardancy.
| Location | 7500 NE St Johns Rd. Vancouver, WA 98665 USA |
|---|---|
| Phone Number | (+1) 360-567-0707 |
| Official Website | https://www.tennmax.com/ |
| Frequency Range | Not specified |
|---|---|
| Absorption Performance | Not specified |
| Dimensions | Dispensable into custom shapes with a minimum thickness of 0.05 cm |
| Weight (kg) | Not specified |
Provides high-performance broadband absorbers for RF and microwave applications, using high-quality materials compliant with NRL 8000 standards. Supports both standard and custom designs, as well as integration with third-party products and expansion of existing facilities.
| Location | 24424 S Main St, Ste 603, Carson, California 90475, USA |
|---|---|
| Phone Number | (+1) 415-409-8517 |
| Official Website | https://dbabsorber.com/ |
| Frequency Range | 1.5GHz~40GHz |
|---|---|
| Absorption Performance | 7dB~40dB |
| Size | 20x20 inches (approx. 50.8cm×50.8cm) |
| Weight (kg) | Not specified |
Delivers high absorption and flame retardancy above 100 MHz, with REACH and RoHS compliance. Manufacturing is carried out in ISO-certified facilities, with full project support including design, testing, installation, and maintenance.
| Location | 3101 Skyway Circle N., Irving, Texas 75038, USA |
|---|---|
| Phone Number | (+1) 972-295-9100 |
| Official Website | https://www.apamericas.com/ |
| Frequency Range | 80MHz~40GHz |
|---|---|
| Absorption Performance (Normal Incidence Reflection Loss) | Approx. 80MHz vicinity: approx. 15~25dB, 300MHz~1GHz: approx. 35~50dB, 3GHz~40GHz: approx. 45~50dB |
| Size | Standard footprint: 61cm×61cm, height variations: 18 inches~36 inches |
| Weight (Kg) | Approx. 4–50 kg |
Lightweight absorbers with a porous foam structure that reduce reflections across a wide frequency range. Available in flat, pyramidal, or wedge shapes, using conductive carbon-filled polyurethane foam.
Thin absorbers with magnetic materials dispersed in resin, ideal for tight spaces. Commonly used for EMI suppression in smartphones, telecom, and automotive electronics (hundreds of MHz to several GHz).
Composite sheets with ferrite or magnetic powder, effective at absorbing GHz-range noise. Ideal for reducing reflections, resonance, and crosstalk in devices like smartphones, 5G modules, and automotive radar.
Pyramidal absorbers reduce reflections through repeated internal attenuation and work across a wide frequency range. Commonly used in anechoic chambers, radar rooms, and antenna test setups.
Hybrid absorbers cover a wide frequency range and are ideal for chambers and 5G/radar testing. Their durable design ensures long-term, stable performance with minimal maintenance.
RF absorbers are materials that suppress electromagnetic wave reflections by converting incident energy into heat through dielectric and magnetic losses.
Lossy materials such as ferrite or conductive carbon are dispersed into resins or foams to attenuate electric and magnetic field components inside the absorber. By matching the surface impedance to that of free space, reflections are minimized and absorption is maximized.
This principle enables RF absorbers to effectively reduce reflection, resonance, and interference in a wide range of applications, including anechoic chambers, radar testing environments, and internal EMI suppression in electronic devices.