Ferrite Absorber
With specialized technologies for developing various ferrite items to meet customer’s demands, Samwha has been manufacturing excellent ferrite absorbers (Flat and grid types). Samwha ferrite absorbers show excellent absorbing performance, customer_faqally resistant qualities, high strength and good heat resistance.So they can be widely used as anechoic chamber for electro-magnetic compatibility(EMC) testing or block against electromagnetic interference(EMI).
Customer
| · ALBATROSS · C&C LAB · ETS-LINDGREN · ETS-JAPAN · FRANKONIA · PANASHIELD · RIKEN |
 |
· BMW 10m CHAMBER · DAIMLERCHRYSLER · HYUNDAI MOTOR · SAMSUNG R3, R4 · LG PHILIPS LCD · 3COM · HUAWEI · TUV RHEINLAND · SANYO · FAXCONN · ACER TAIWAN · SHANGHAI DAIZON |
Applications
- Anechoic chamber for EMC Testing (Compact, 3m and 10m chambers, etc.)- Radio-wave absorption for noise block like TV ghost by Skyscrapers.
- Improve communication environment (Ferrite powder as material of rubber sheets
Features
- Broadband characteristics: Samwha ferrite absorbers show good absorption in the range of 30㎒~1㎓.
- Space efficiency
: Due to thin thickness of ferrite absorbers, the volume which the absorbers installed in the anechoic chamber is greatly reduced.
- High power handling capability
: Non-flammable characteristics of ferrite absorbers can be properly utilized for high power radiated immunity test.
- Easy installation
: Ferrite absorber panels will be directly screwed on shielding enclosure which enables installation easily.
- Performance stability
: For no physical degradation through years, Samwha ferrite absorbers have good performance stability
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| Characteristics | Symbols | Units | SN-20 | SN-16A | SN-01A |
|---|---|---|---|---|---|
| Initial permeability | μiac | 2000±20% | 1600±20% | 100±20% | |
| Relative loss factor | tanδ/μiac | x10-6 | 25 (0.1㎒) | 25 (0.1㎒) | 52 (1.0㎒) |
| Saturation flux density (1194A/m) | Bs | mT | 260 | 350 | 380 |
| Remanance | Br | mT | 100 | 120 | 300 |
| Corecivity | Hc | A/m | 12 | 15 | 120 |
| Relative temp. factor (20℃~60℃) | αμr | x10-6/℃ | 3~5 | 5~10 | 5~10 |
| Curie temperature | Tc | ℃ | > 100 | > 120 | > 300 |
| Density | δ | ㎏/㎥ | 5.0 x 103 | 5.0 x 103 | 5.0 x 103 |
| Resistivity | ρ | MΩ*m | > 1.0 | > 1.0 | > 5.0 |
| Frequency coverage of Reflection loss (under -20dB) |
- | ㎒ | 30~400 | 65~500 | 630~1270 |
| Optimized thickness of tiles | - | mm | 6.7 | 5.2 | 4.0 |
| Production | - | - | Under production | Newly developed | Newly developed |
Products
Flat Type AbsorberSamwha produces excellent single type(SD) in the range of 30㎒ to 400㎒.
The panel types(SFA) are easy to be built for anechoic chamber with lower cost than single types, under any circumstances.
1) Specifications
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| Type | Part No. | Drawing | A | B | C | H | Wt[g] |
|---|---|---|---|---|---|---|---|
| Single | SD100*100*6.7-10H1) | 1 | 99.95±0.10 | 99.95±0.10 | 6.75±0.10 | 10.00±0.20 | 340 |
| SD200*200*6.7-10H | 1 | 200.00±0.15 | 200.00±0.15 | 6.75±0.15 | 10.00±0.20 | 1370 | |
| Panel | SFA110A-92) | 2 | 300.00±0.50 | 300.00±0.50 | 18.90±0.50 | - | 3900 |
| SFA600A3) | 3 | 600.00±1.00 | 600.00±1.00 | 21.95±0.50 | - | 16000 |
1) Thicknesses of tiles are available from 5.0 to 6.75
2) 9 pcs flat type absorbers, epoxy bonded to particle board(12mm) and Steel plate(1.2mm) as well available.
3) 36pcs flat type absorbers, epoxy bonded to particle board(15mm)
2) Drawing
3) Performance Characteristics
Grid Type Absorber
Grid type absorber(SGA) shows much improved broadband characteristics, compared with flat type absorbers(SFA).
The combination of ferrite material and specific grid structure offers remarkable absorption function in the range of 30㎒ to 1㎓.
1) Specifications
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2) Drawing
3) Performance Characteristics
