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RF-tight enclosures are miniature screen rooms

Posted: 22 Nov 2005 ?? ?Print Version ?Bookmark and Share

Keywords:azimuth systems? rf enclosures? multiple-input-multiple-output? mimo?

If you are working with RF (especially receiving systems) and your lab does not have a screen room, here is an alternative. Azimuth Systems has a line of RF isolation enclosures that can help users test multiple-input-multiple-output (MIMO) systems, as well as other wireless technologies. These enclosures are designed to be mounted in standard 19-inch racks, or they can sit on a bench.

The integration of multiple wireless technologies into the same device and the shift toward MIMO place demanding requirements on test equipment, and shielding is often needed to exclude unwanted signals. These enclosures provide that much-needed RF isolation, especially for products that operate in frequency bands between 800MHz and 6GHz.

According to Azimuth, the new RadioProof enclosures provide state-of-the-art mechanical and electrical filtering to prevent unwanted RF interference from entering or exiting the chamber. The enclosures provide RF connections for MIMO systems with up to four transmitters and four receivers. The system also filters signals for power, networking and digital control.

The enclosures can be used with the company's ACE 400NB MIMO channel emulator for testing Wi-Fi products. The ACE reproduces 4 x 4 multi-path environments with channel correlation, providing testing capabilities that were previously limited to research facilities. The ACE lets users measure performance in an emulated realworld environment.

Two versions

There are two versions of RadioProof enclosures, priced at about $9,900 each. A RadioProof 401 can house a single device such as a notebook computer. Its RF isolation chamber provides up to 90dB of radiated RF isolation between the DUT (device under test) and the outside world. The 401 also includes a filtered fan to cool DUTs to prevent over-heating during a test.

Meanwhile, the RadioProof 402 is a dual RF-isolation chamber that houses up to two devices (such as cellular handsets and access points). It also ensures up to 90dB of radiated isolation.

Unlike the fan cooled 401, the dual-enclosure 402 uses passive cooling. It can be used for side-by-side performance, range and interoperability testing.

I/O ports

Both models also integrate connectivity options. These include dual 10/100 Ethernet ports supporting Power-over-Ethernet, an 8-pin COM port for serial or other communication links to DUTs, and power connections for feeding in up to 50Vdc or AC to power the DUT.

- Alex Mendelsohn


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