Frankosorb® Absorbers

Unique Technology in Perfection

Since Frankonia’s Frankosorb® absorber technology started to dominate the market, more and more customers recognize and appreciate the stable performance characteristics and many more unique attributes offered by this technology. Frankosorb® convinces with more than 25 years of operation without having any malfunction, defect, quality or performance loss or the need to refurbish.

Frankonia’s unique Frankosorb® absorber technology is using the Nano thin-film technology developed in the early 1990’s by Prof. Nimtz from the University of Cologne. His researched focused on the impedance of a thin polyethylene film coated with metal for absorbing waves. Together with Frankonia, the fundamental research results have been converted into usable materials for pyramidal absorbers and paired with an industrial manufacturing.

The Frankosorb® technology and its specific manufacturing process is available either as a hybrid solution in combination with Ferrite absorbers, or as a stand-alone pyramid solution with a length up to 2,4 m. The most important advantage of the Frankosorb® long pyramid absorbers is the covering of the whole frequency range starting from 30 MHz so that additional Ferrite absorbers are unnecessary.

Physical background:
The size of absorbers is mainly defined by the lowest usable frequency. It is calculated according to 1⁄4 of the wave length. For example: 30 MHz

Physical formula: 1⁄4 λ = C/F
C = light velocity (approx. 300.000.000 m/s)
F = lowest frequency 30.000.000 Hz
λ = 300.000.000 / 30.000.000 = 10 m
Long pyramid absorbers at 30 MHz >> 1⁄4 λ = 2,5 m

At a Glance

Today, Frankonia’s Frankosorb® unique absorber technology is the only solution existing on the world market, that is…

  • completely carbon-free,
  • guarantees long-term stable conditions,
  • is non-combustible in A2 per EN 13501-1,
  • and offers a safe environment for people and EUT.

Perfectly, the Frankosorb® absorber technology combines a variety of high-performance standards in a single solution. Due to the stable performance characteristics and its unique non-combustible attribute, a safe environment for people and EUT can been assured, which also leads to a constant, reproducible and long-lasting testing quality. Aligned with customers’ requirements, the Frankosorb® absorbers are available in several configurations that achieve a cost-effective and high-performance solution.

Thus, together with the Frankosorb® absorber technology, Frankonia’s chambers offer the best choice for long-term investments.

Facts and Benefits

Nano thin-film technology guarantees highest homogeneity and impedance accuracy

Non-combustible absorbers according to DIN EN 13501-1 class A2 – s1 d0

equivalent to DIN 4102 class A2

and Chinese GB8624-2006; Russia GOST 30244-94

evaluated according to NRL 8093 report for tests 1, 2, 3, 4 and 5

compliant with EN/ISO 5659-2 (smoke generation and opacity)

Hardly inflammable absorbers according to DIN EN 13501-1 class B

equivalent to DIN 4102 class B1

and Chinese GB8624-2006; Russia GOST 30244-94

evaluated according to NRL 8093 report for tests 1, 2 and 3

Not carbon-based absorbers

Cost saving solution with Frankosorb® non-combustible absorbers as no sprinkler or fire extinguishing system is necessary

High-performance characteristics ensure reproducible test results

Proven long-term stability for more than 25 years

Non-hygroscopic materials are used to meet any climatic conditions

Completely heat, cold and moisture/humidity resistant

No toxic gases emitted in case of absorber heating

No dirt, solvent-free, and free of glue or other harmful substances ensure a healthy environment for people and EUT

Recyclable at 99%

Clean room classification according to ISO 14644-1 Class 5

White coloring that improves the illumination level (no covers necessary)

Space-saving and stackable floor absorbers

Removable due to absorber fixation either by screw or hanging type

No aging or drooping, no losing performance

Due to the stable performance characteristics and its unique non-combustible attribute, a safe environment for people and EUT can been assured, which also leads to a constant, reproducible and long-lasting testing quality.

Frankosorb®
The number one choice when it comes to your long-term investment.

Absorber Range

  • Short pyramid absorber series (P600 or P900), 80 MHz to 18/40 GHz (typical)
  • Long pyramid absorber series (P2400), 26/30 MHz to 18/40 GHz (typical)
  • Ferrite absorber, 30 MHz to 1 GHz (typical)
  • Hybrid absorber series, 30 MHz to 18/40 GHz (typical)

Frankosorb® Pyramid Series

The Frankosorb® pyramid absorbers are an all in one solution typically from 30 MHz to 18/40 GHz.

Th inner shielding will be assembled with a horizontal clip-in substructure in a predefined grid that accepts the prefabricated short or long pyramid absorbers with their specific size to ensure the highest performance level.

Features

P2400: Typical frequency range 26/30 MHz to 18/40 GHz
(e.g., automotive & commercial chambers)

P600 or P900: Typical frequency range 80 MHz to 18/40 GHz
(e.g., MIL Chambers)

High quality prefabrication

Everything is hanged into rails

Frankosorb® long pyramid absorbers start already below 30 MHz (no Ferrite necessary)

No impedance matching problem

Removable long pyramid absorbers piece-by-piece

Frankosorb® technology

Absorbers available acc. to DIN EN 13501-1 in fire class B (hardly inflammable) or A2 (non-combustible)

Frankosorb® Hybrid Series

The Frankosorb® hybrid absorbers are a combination of Ferrite tiles typically from 30 MHz to 1 GHz and short pyramid absorbers to expand the frequency range from 1 GHz to 18/40 GHz.

The Ferrite tiles are pre-assembled on wooden chip boards in a typical size of 600 mm x 600 mm, and will be screwed to a substructure. The pyramids absorbers are installed in a second step, in which the Ferrite absorbers typically get special fixation kits. Those are simply screwed to the Ferrite using nuts and threaded rods.

Features

Typical frequency range 30 MHz to 18/40 GHz

High quality prefabrication

Everything is screwed

Removable hybrid absorbers piece-by-piece

Optimized impedance matching between hybrids and Ferrites

Frankosorb® technology

Absorbers available acc. to DIN EN 13501-1 in fire class B (hardly inflammable) or A2 (non-combustible)

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