Cobham Antenna Systems, Microwave Antennas
News
2003-04
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Inmarsat choose Cobham Antenna Systems, Microwave Antennas
to develop an antenna for remote use with their Regional BGAN solution
Inmarsat Limited, the Total Communications Network, is one of the world's leading providers of global mobile satellite communications. Working through a network of some of the world's largest telecommunication businesses they provide a communication network to some 180 countries.
With business being carried out around the world, and work patterns demanding fast, efficient electronic communication all the time, everywhere, Inmarsat has developed the Regional BGAN solution (Broadband, Global Area Network) consisting of a light weight satellite IP model to provide high-speed connectivity that runs at up to 144kbit/s via a secure shared channel, more than twice the speed of GPRS. With Regional BGAN, connection to the Internet or LAN is as easy as if the user was sitting at their desk, wherever they may be. |  |
The Inmarsat Regional BGAN unit comprises the modem, radio and an integrated antenna in a compact package. However, it is not always ideal to leave the modem outside or unattended, for example in areas of civil unrest or where the signal may be disrupted. For these applications Inmarsat wanted to be able to provide a remote antenna that could be left in situ or easily relocated.
Inmarsat chose Cobham Antenna Systems (Microwave Antennas) to develop a high gain passive antenna that could be located outdoors. Satisfying Inmarsat with their facilities to test antennas under development through their on-site near field test facility, and with a modern production facility, the RBGAN slim, flat panel, directional antenna was developed and manufactured. The antenna, model FPA17-17RL/1020, measures 700x400x12mm (28x16x0.5 inches).
High gain allows the antenna to overcome the losses of the cable that allows remote operation 10m from the external antenna. Polarisation can be easily changed from left hand to right hand circular. Axial ratio is better than 3dB on boresight. The VSWR of the antenna system is better than 2:1 at any frequency. The antenna operates with the temperature range -50° to +50° Celsius in up to 95% relative humidity, and meets MIL-STD-810E standards for blowing rain.
www.inmarsat.com
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