EMI Absorbers
With increased demands for faster speeds in smaller devices, engineers are facing new and more complex EMC compliance challenges. KGS brand EMI absorbers have a strong adhesive on one side to adhere to almost any surface. Most of KGS absorbers can be cut to size with scissors or cutting knife. The absorbers are simply applied directly on the noise source for effective EMC suppression before the noise can spread or cause cross-talk. Applying EMI absorbers at the noise source also allows to reduce the amount of material used on the device (as opposed to an entire wall or panel away from the noise source). EMI absorber materials can be time- and cost-saving solutions that can be used when there is no time or budget allotted to re-spin the board.
KGS EMI absorber product range include higher frequency broadband, lower frequency broadband, narrowband (or pinpoint absorbers), and RFID/NFC/wireless charging flexible ferrite sheets. Market applications include commercial and industrial devices, medical equipment (where adhesives are allowed), military devices (non-combat), test equipment, and even within automotive vehicles (certain absorbers are automotive-rated).
Absorbers are available in sheets and come in a variety of different thicknesses to fit any application’s space restrictions.
Applications:
Smart phones, Cell phones, Tablet PCs, Laptops, Ultra-thin type laptops, GPS, Computers, Medical Instruments, Military Applications, Test Equipment, Automotive Applications, Etc.
These flexible absorber sheets can also serve other uses. Coupling and cross talk are major problems in applications where many components have to share extremely limited space. Adding EMI absorbers can reduce these two problems while also adhering to space restrictions. EMI Absorber sheets have also been used to increase the performance in RFID (radio frequency interference) applications by correcting the magnetic field loop for RFID reader malfunctions at 13.56 MHz. This material gathers magnetic field to gain more signals in order to eliminate the need for wires. They come in a variety of types depending on the attenuation needed and application including those devices with NFC (near field communication) technology.
Please feel free to explore below for all variations.
EMI Absorber Sheets
(Broadband Type)
Broadband absorber types cover a wide range of frequencies from the lower couple hundred MHz toward 10 GHz. Soft ferrite with epoxy base standard EMI absorber covers the low MHz range. It also works for RFID at 13.56MHz.
Electromagnetic noise suppression sheets, composed of heat resistant rubber mixed with magnetic metal filler.
Electromagnetic noise suppression sheets, composed of resin mixed with magnetic metal filler.
Electromagnetic noise suppression sheet, composed of low outgassing and low volatile organic compounds. Sub-6 GHz frequency range absorber
EMI Absorber Sheets
(Narrowband Type)
Narrow band types absorbers (also known as Pinpoint types, microwave absorbers) attenuate 10-20 dB at one particular frequency. These are mainly designed for UHF (300MHz ~ 3GHz range) and SHF (3~30GHz) frequency range.
Thin and light, EM wave absorber with narrow GHz band. Lighter than conventional rubber absorber due to paper used as the main material.
Pinpoint/narrowband absorbers with high attenuation of microwave noise problems at a specified high frequency.
EMI Ferrite Sheets and Tiles / Tiles for Lower Frequency Range
Narrow band types absorbers (also known as Pinpoint types, microwave absorbers) attenuate 10-20 dB at one particular frequency. These are mainly designed for UHF (300MHz ~ 3GHz range) and SHF (3~30GHz) frequency range. Flexible ferrite (FFS and FFSX-H), Soft ferrite with epoxy (MAB) and solid Ferrite (SD tile) are all designed to be EMI absorbers that cover the low MHz range. They also work for RFID @ 13.56MHz.
Flexible ferrite (FFS and FFSX-H), Soft ferrite with epoxy (MAB) and solid Ferrite (SD tile) are all designed to be EMI absorbers that cover the low MHz range. They also work for RFID @ 13.56MHz.
Effective reduction in RFID-to-metal interference in systems at 13.56MHz. Increased wireless charging performance at 6.78 MHz
Higher insertion for low-frequency band and achieves excellent performance in suppressing noise. Thin Ferrite Sheet with higher loss and more flexibility.
Very thin and flexible ferrite tile, ideal for low frequency wireless charging. Designed specifically for wireless charging applications.
Reduced thickness (0.8mm) allows the tile to be inserted between CPU and heat sink, providing EMI shielding without affecting the heat dissipation process.
Thin Ferrite Sheet provides optimal EMC soution for FPC (Flexible Printed Circuit) and FFC (Flexible Flat Cables).
Dual Functioning EMC and Thermal Management
This type contains both EMC and thermal management functions. It works to reduce EMI noise as well
as act as a thermal interface material (TIM) between the heat sink and the heat source. Attenuation is
achieved in the same area where heat also needs to be regulated. This unique type can save space,
cost, and time.
Excellent EMI absorber performance (µ’= 13 at 10MHz). Compliable material (ASKER C 40) that conforms to uneven surfaces.
KGS-original formulation allows for great EMC noise suppression. Recommended frequency range from 500MHz ~ 3GHz.
Low dielectric thermal pad which helps to suppress noise in the GHz band which occurs due to heatsink
resonance phenomena.
RFID / NFC Absorbers
RFID types are specifically designed for RFID applications’ malfunction. These applications require as
large amount of magnetic field (u’) to be gathered at 13.56 MHz and other frequencies to enhance the performance of the read range to pick up signals. These absorbers are made with ferrite material that
has been specifically designed with low levels of conversion (u”).
Effective reduction in RFID-to-metal interference in systems at 13.56MHz. Increased wireless charging performance at 6.78 MHz
IMRFS works to improve the range of RFID (13.56MHz) via the reduction of RFID-to-metal interference.
