Case Studies

To design, manufacture, install an anechoic test chamber compliant to MIL-STD-461G to be used for radiated emission vehicle tests.
The chamber shall be suitable for large heavy vehicles to be driven into the chamber and also provisions for components to be tested on a large test-bench.
The chamber needs to meet the clients' bespoke requirements, so a careful and accommodating design consultation process was required.

A shielded room (Faraday cage) was installed including a steel support structure. The steel support structure was self-standing and fully independent of taking any loads from the host building.

A large sliding door was installed including an automatic pneumatic ramp. The ramp was surface mounted and did not require excavation of the host buildings floor. The sliding door had a clear opening dimension of 4.0m (W) x 5.0m (H) to allow large vehicles to enter the chamber as a complete unit. The door was automated to enable the operators of the chamber to open and close the door with ease.

SMA550 Pyramidal absorber was used to completely cover all walls and ceiling as much as physically possible. The absorber exceeds the requirements of -6dB at 70 MHz and -10dB at 250 MHz and above (at normal incidence).

The client received a new test chamber complete with all new parts covered by Global EMC’s warranty and after-sales support.
The client (having an expanding product portfolio) now had the benefits of its own on-site test facility to quickly and efficiently test its products as per business requirements. The chamber can be used when required and no logistics were required to an off-site test facility.

The client required the design, manufacture, installation and commissioning of a new 10 meter compliant EMC military vehicle test chamber. The chamber required compliance to Class I GOST 30373-95 / GOST R 50414-92 in the frequency range from 9 kHz to 18 GHz. The chamber was also designed to enable testing to 36 other standards including CISPR, GOST and IEC/EN61000-x-x standards.

The client also required a 16-meter diameter turntable, one of the largest ever installed in an EMC chamber. This coupled with temperatures of -40⁰C, limited timescales and the high-performance specification made for a very complex delivery of a prestigious project.

Global EMC utilised our 2400mm long hollow pyramid absorbers as the anechoic lining of the chamber. The length of these absorbers enabled us to meet the specification without the use of ferrite tiles and hybrid absorbers. This gave the client a reduction in the cost, weight and installation time for the chamber.

Shield effectiveness of greater than -80db from 10 kHz to 18 GHz was achieved using our modular “pan” type shielding system, effective integration of numerous peripheries and specialist sliding door. The shield effectiveness was tested by an independent ISO 17025 test company to IEE Std. 299 to ensure an unbiased test report.

To enable the client to enter heavy vehicles into the chamber, a specially designed 10 tons per square meter floor was installed between the 4.2m (H) x 4.2m (W) sliding door and 16-meter diameter turntable. The turntable was designed to have a loading of 20 tons.

The client received a compliant 10-meter test chamber of all new components covered by warranty. The chamber enables the client to perform both emission and immunity tests to the standards they required. The chamber was built to be robust and durable for the heavy-duty environment of large vehicle testing. The large turntable, crane, extract system and sliding door gave the client scope for a wide and varied testing facility.
Using the long hollow absorbing material gave a cost-effective solution to the anechoic requirements for the chamber.

The client required the design, manufacture, installation and commissioning of a new 5G test chamber. Located in a state-of-the-art facility, the client required an anechoic chamber for research and development for the design of radio-enabled electronics and devices.
The anechoic chamber needs to let the end-user to perform measurements for antennas, mmWave circuits and propagation characterisation. The chamber required a performance from 800 MHz to 86 GHz with an optimised frequency range between 1 GHz to 40 GHz.

Global EMC provided the client with a 10.0m (L) x 6.0m (W) x 6.0m (H) anechoic test chamber. This is currently the largest chamber of this type in Ireland.

To meet the anechoic performance specification required, GDS300 pyramidal foam absorbers were used on all surfaces with the exception of 3 meters square of GDS200WW to sections of the floor area to provide users means to reach equipment and test locations.
A diamond configuration of absorbers was installed at the angles of incidence on the sidewalls and ceiling. This was to increase the performance of anti-back scatter for antenna measurements.

Two personnel doors gave users convenient access to key locations within the chamber.

A field probe positioner and 0.3m turntable was also supplied and installed as part of the project. This was controlled by a multi-function controller and camera to give the user visibility when in the adjacent control room.

The chamber was tested by an independent ISO 17025 test company for shield effectiveness and anechoic performance. This was to ensure an unbiased review of the chamber to confirm it met the client’s requirements.

Upon completion, the University received a national test chamber for the research and development of the next generation of 5G technologies and devices.

The chamber is complemented by the world-class researchers and in-house staff to provide businesses and academic students an advanced test facility for research and development of future networks and communications.

The higher performance of the chamber ensured that frequencies of up to 86 GHz can be accommodated.