EMC shielding fleece
From the shielding chamber to small electrical parts
Shielding fleeces are used in military and medical applications, among others. Further applications can be found in the technical field and in the shielding of electromagnetic waves. Compared to woven and knitted fabrics, shielding fleeces have a comparatively low thickness.
Based on many years of research and development work in aircraft construction as well as in the military sector, it has been possible to produce a shielding fleece which, thanks to its special copper coating, achieves a shielding of up to 99.999999 %.
Due to its special structure and coating, the shielding fleece can be used not only for the electric field but also for the magnetic field for the first time.
The attenuation value of the shielding is ideal for all areas where flexibility, high shielding effectiveness and current carrying capacity as well as simple and trouble-free processing are required. The material is air-permeable and breathable and can be cut and sewn with scissors or a knife. This non-woven fabric is a material that has the special properties of metals. It is flexible, air-permeable and structured. 40 g fabric contains 32 g metal.
Another interesting feature of the product is its absorbent property.
Your advantages at a glance
- Uncomplicated protection of your devices against interference
- Shields high and low frequencies plus magnetic fields
- Absorbing effect
- Significantly more economical than previous shielding systems for room shielding
- The shielding fleece provides excellent protection against electromagnetic radiation for walls, floors and ceilings
- Shielding effectiveness: 60 - 120 dB at 0.05 - 40 GHz
- Breathable and resistant to environmental influences
- Absolutely maintenance-free shielding system
The shielding fleece is the basis for other EMC products, such as the EMC adhesive tape or EMC enclosure protection.
The advantage of all these EMC products is their excellent shielding properties. Among other things, this product diverts almost 100 % of the radiation.
Further products
The EMV adhesive tape
- Current carrying capacity: in X- Y- Z- axis
- Width: 4 – 1.000 mm
- Conductivity: 5 mΩ / Square
- Adhesive layer thickness: 0,14 mm
- Type of adhesive: Acrylic (modified)
- Shielding effectiveness: up to 120 db – 85 dB (average value)
- Heat load: 25 minutes = 270 °C
/ 40 minutes = 240 °C
Possible areas of application
Shielding of flat cables and round cables
As a basis for the shielding of various cables we use the absorbing shielding fleece, which has proven itself in many applications by its high shielding effect. In order to enable appropriate contact at the cable ends if necessary, we recommend the use of the EMC adhesive tape for EMC/RFI shielding, earthing and to avoid electrostatic charges, as a suitable accessory. This shielding of round and flat cables is a very efficient and cost-effective solution for retrofitting existing systems with high effectiveness. The possibilities and applications are almost limitless.
The shielding can be supplied in all widths and lengths as well as on rolls – standard widths and lengths can be shipped from stock at short term.
- Substrate: Polyamide Spunbond nonwoven, chemically bonded
- Weight: 40 g/m² (without coating)
- Thickness: 0,15 mm
- Tensile strength: > 150 %
- Shrinkage: < 0,9 %
- Coating: Special copper coating
- Halogen content: Halogen-free
- Protective layer: Corrosion protection layer
- Resistivity: < 5,5 mOhm
- Average attenuation factor: 85 dB shielding effect
- Maximum achievable attenuation: 120 dB (depending on use, frequency range & environment of the application)
Housing protection through laminate
Room shielding
This product is ideal for protecting walls, ceilings and floors from electromagnetic radiation. Best shielding attenuation of up to 99.999999 % at low cost is the motto of our new shielding system. Thanks to its unique structure and coating, the shielding fleece can be used for the first time not only in the electric field but also in the magnetic field and thus reliably protects your furnishings from interfering electromagnetic radiation as well as magnetic fields. We recommend using our adhesive in addition, as it has electrical conductivity for the contact of the different panels at the same time as very high resistance. This means that even small companies or individual users can easily implement the system according to instructions. The integration of existing installations and conditions, such as ventilation or cable ducts, is also possible without much effort.
- Very low surface resistance of 0,02 Ohm
- Resistance to ozone, oils and other environmental influences
- Easy cutting with knife or scissors
- Abrasion resistant
- Low required contact pressure forces (from 5 % linear resistance)
- 100% halogen-free ingredients
- Does not absorb water
- Wide range of application from -40 °C to +110 °C
- Acoustic damping
- Absorber effect
- Substrate: Polyamide spunbond fleece
- Weight: 84 g / m²
- Thickness: 0,12 mm
- Coating: copper, protective coating
- Shielding effectiveness: max. 99,9999 % – 120 dB
- Shielding effectiveness average value: – 85 dB
- Frequency range: 15 kHz – 40 GHz
(MIL-STD 285) d - Resistance: < 5,5 mΩ
- Earthing: Earthing is carried out for reasons of personal protection, but mainly to shield the low-frequency alternating electric fields.
EMC shielding with the shielding cabin 100017
The cabin 100017 is used to shield equipment under test from external RF fields or to protect measuring devicess, e.g. during ESD tests.
In case of problems with particularly high demands on the equipment under test or in the USW range, interference fields from the environment must be shielded by a conductive enclosure.
The sealed cabin achieves a shielding effectiveness of approx. 50 dB in the frequency range up to 1 GHz. When closed, this provides an interference-free measurement environment. This allows interference emission measurements to be carried out on the DUTs without the need for an expensive EMC cabin or to protect sensitive measuring equipment during an immunity test, e.g. during an ESD test.
The shielded enclosure is a mobile enclosure for measurements on electronic circuits. It fits comfortably on any desk, is 40 cm high and offers a working area of 50 x 90 cm. This offers sufficient space.
However, for larger test specimens or measuring instruments, a further shielding cabin with the dimensions 50 x 90 x H 65 cm is available as standard. Two adapters are included in delivery. These are plugged as extensions to the two rear axles.
Folded up, the shielded cabin takes up little space and is easy to store.
The system consists of the tent, a support device and a base plate.
This metal base plate forms the reference surface for the measuring system.
The following interfaces have been installed as external connections:
1 filtered 230-volt safety plug
1 RJ 45
1 USB
1 x 3.5 mm connector for 12 V supply
1 BNC-RF transit
4 SMA-RF transit
4 filtered transits for laboratory cables
The installation is very simple. The support device is first unfolded and then inserted into the two rear openings of the base plate. Then the shielding cover is simply pushed onto the support.
Magnetic rubbers and pressure locks are incorporated in the cabin. It can therefore be assembled in a few seconds.
The cabin can be closed and opened very conveniently from the front for quick access to the test specimens. For better access, the entire cabin can also be inclined backwards.
Scope of delivery
1x Ground plate
1x Shielding cover
1x Frame
Optional
The cabin can also be supplied with a complete ESD measuring field kit.
The kit is used to measure the electric or magnetic fields of the ESD generator. In addition to the test pulse, ESD generators also emit electric and magnetic interference fields that influence the test object. This additional influence is undefined and falsifies the ESD test result.
The developer can use the cabin to measure the additional fields of the ESD generator at his workplace and at the same time vary the position of the ESD generator in relation to the field measurement system. Knowledge of the strength and local distribution of the electric and magnetic interference fields of the ESD generator used is an important aid in suppressing device interference.
Scope of delivery
- 1x magnetic field sensor, used to measure the temporal change of the magnetic field strength characteristics dB/dt up to 3 GHz
- 1x E-field sensor, for measuring fast transients with a bandwidth up to 3 GHz
- 1 x E-field sensor, for measurement of fast transient fields or RF fields.Time responses or frequency responses can be detected for a
bandwidth up to 3 GHz - 1 x Groundplane, ensures the RF-compatible contacting of the probes during an EMC-Measurement on a test IC
- 1 x ground adapter 32.9 x 32.9 mm, serves to adapt the test PCB to the (100 x 100) mm groundplane recess
- 1 x measuring cable SMA 1 m double shielded with coaxial construction
- 1 x measuring cable SMA 0.7 m double shielded with coaxial structure, red
- 1 x measuring cable SMA 0.7 m double shielded with coaxial
structure, yellow - 1 x measuring cable SMA 0.7 m double shielded with coaxial structure, green
- 1 x measuring cable SMA 0.7 m double shielded with coaxial construction, blue
- 1x MP ESD field case, system case 1x MP ESD Field m, User Manual
- Shielding effectiveness: 45 dB – 50 dB / 30 MHz – 1 GHz
- Weight: 12 kg
- Dimensions: (L x W x H) (900 x 500 x 400) mm
Summary
Since in a typical test setup with the shielding cabin all cables to the DUT are removed, filtered or placed on the base plate (capacitive coupling), shielding is possible in the immediate vicinity of the DUT. The metal base plate, which forms the reference surface of the measuring instrument, ensures a good and constant conductive connection to the current transformer or the HF derivation.
Ground plate
The ground plate serves as reference ground plane for EMC measurements and for shielding of DUTs or corresponding measuring devices.
These measuring instruments are protected against interference during EMC tests (ESD, burst, etc.) with the shielding cabin.
The electric connections between the setup on the groundplate and the environment are led outward via filters or RF connections to the outside. Supply connections: 110/230 V; 4x 50 V; 12 V DUT connections: RJ45; USB; 1x BNC; 4x SMA.
The 230 V filtered safety plug is used to supply the measuring instruments (oscilloscope, spectrum analyzer, power amplifier) located on the ground plate.
Via Ethernet or USB connection the instruments can be remote controlled from outside and the DUTs can also be monitored and controlled from outside.
The 3.5 mm connector is used to supply power to equipment, e.g. preamplifiers on the ground plate. The preamplifiers are used for measurements with near-field probes or the HFW 21.
The BNC RF transit is used to transmit the measurement signals, for example from the near-field probes to the spectrum analyzer.
The 4 SMA RF filtered transits can be used transits for the measuring channels of an oscilloscope.
The 4 filtered transits for laboratory cables power the DUT
- Current 10 A
- Dielectric strength: 50 V
- Work surface: (length x width) (900 x 500) mm
- Weight 9,25 kg
Screen cover
The cover consists of a conductive fabric. It is pulled over the cabin poles, which are inserteded into the ground plate. This creates a shielded space suitable for measurements of electronic assemblies during development or larger devices.
The cover can be easily and quickly opened and closed from the front, allowing access to the test object at any time.
The RF sealing of the cabin is achieved by means of magnetic sealing strips. The shielding cover is easy to handle. When folded, it takes up little space and is easy to store.
- Shielding effectiveness: 45 dB – 50 dB / 30 MHz – 1 GHz
- Weight: 1 kg
- Dimensions: (L x W x H) (900 x 500 x 400) mm
Cabin frame
- Weight: 2 kg
