Featured image

Case Studies

AIRDATA Launch Fast, Portable Internet Access using Cobham's Antennas

AIRDATA AG offers a portable way of accessing the Internet using new 3G standards. The new Internet access has completed a successful trial and it is now possible to use the Internet wirelessly in almost every part of Stuttgart, at DSL speeds. Using a modem the size of a mobile phone, the system works in a similar way to WiFi, but without the usage fees. 

This is enabled by a wireless local loop network, built by AIRDATA, which provides for both voice and data transmission. The network uses a system that is based on worldwide, harmonised, 3G Radio Standards. Compared to wireless LAN, the network allows for much further coverage, creating 'hot-zones'. In addition, users do not need subscriptions with multiple providers, nor do they have to pay any of the additional usage fees that wireless LAN hot-spots currently require. The AIRDATA network opens an attractive alternative to fixed-line services.

The system is easy to install: the user simply inserts the SIM card into the Portable DSL modem, connects the modem to the computer, then enters the user name and password. There is no need to connect to a phone outlet and there is no additional hardware or software required. The modem is approximately the size of a cordless phone.

AIRDATA installed base-stations throughout Stuttgart, which use omni and sector antennas developed by Chelton (still known, at that time, as European Antennas).

The omni antennas are ETSI compliant, with high gain and low azimuth ripple. We designed them such that their elements are fed into the centre of the array, which ensures that the main beam remains on the horizon at every frequency across a very wide bandwidth.

These sector antennas have dual slant polarisation (+/- 45°) across the full bandwidth of 2.5 to 2.7GHz, and they are compliant to ETSI EN301-525 Class CS standards, sanctioned by RegTP – the German equivalent of Ofcom (the UK communication industry regulator).

AIRDATA AG is a communications infrastructure provider. More information on the system and AIRDATA is available from www.airdata.de

Contact us direct for more information: newmarket.sales@chelton.com, or telephone +44 (0)1638 732177.