EMI / RFHigh Performance Absorbers
Global EMC provide a wide range of anechoic absorber for RF, EMC and microwave applications. Specifically designed to reduce or eliminate the reflections from electromagnetic waves by absorbing the energy, dissipating the waves and turning it into heat energy. Designed to cover a wide frequency range, our portfolio of anechoic absorbers range from microwave absorbers, through to high power and hybrid absorbers.
PLEASE NOTE – MINIMUM ORDER VALUE OF £ 9,000 GBP or $10,000 USD APPLIES TO ALL ABSORBER ENQUIRIES.
Wedge Absorbers
Wedge absorbers give around 20% more anechoic performance than full peak absorbers at frequencies below 1 GHz, due to their greater mass. The wedge system is used where a low-frequency bias is required.
Using the 20% mass the Wedge absorber system can save money by using smaller pyramids and the microwave performance is excellent with a return loss of -40dB at 8 x wavelength.
Global EMC’s wedge pyramid absorber gives excellent performance in compact chambers.
Compatible chambers/applications: MIL-STD461G, CISPR12/25, ETSI, Radio/Low Microwave Work.
Full Specification
| Length (mm) | Part No. | Normal incidence return loss (-dB) | ||||||
|---|---|---|---|---|---|---|---|---|
| 50 MHz | 100 MHz | 300 MHz | 1000 MHz | 5 GHz | 10 GHz | |||
| 300 | GDS300-W | N/O | N/O | 18 | 30 | 35 | 40 | |
| 400 | GDS400-W | N/O | 12 | 20 | 30 | 40 | 40 | |
| 500 | GDS500-W | N/O | 17 | 25 | 32 | 40 | 40 | |
| 700 | GDS700-W | 15 | 20 | 30 | 35 | 40 | 40 | |
Special Absorbers
The principal of this type of absorber is to mimic free space by ‘progressive impedance’ that is, to progressively absorb the radio wave/microwave through a resistive structure having a progressive shape, this converts the electromagnetic energy to heat energy.
The available thicknesses are:
25mm thick (part No GLD - block 25).
50mm thick (part No GLD - block 50).
75mm thick (part No GLD – block 75).
Block foam absorbers use graded doping, the available thicknesses are:
25mm thick, performance >-17dB above 5GHz (part No GLD-FL-25).
50mm thick, performance >-17dB above 2.5GHz (part No GLD-FL-50).
100mm thick, performance >17dB above 1.2GHz (part No GLD-FL-100).
Other Special Absorbers products: Machinable bar/sheet stock, rubber flat sheet 1.2mm~10mm thickness, walkway block absorber (for antenna measurement chambers), thin layer (lossy) doped foam, ultra-performance microwave absorbers that can reach -70dB return loss, anti-back-scatter absorbers, Chebyshev absorber layouts.
PLEASE NOTE – A MINIMUM ORDER VALUE OF £ 9,000 GBP or $10,000 USD APPLYS TO ALL ABSORBER ENQUIRIES.