SAMPSON MFR active phased array antenna

The SAMPSON MFR is the latest in a succession of active phased array multi-function radars (MFRs) produced by AMS at Cowes on the Isle of Wight, UK. Based on technology derived from the MESAR demonstrator programme, the SAMPSON MFR is the first active array radar produced at Cowes destined for active service. Two active array faces are mounted in a single housing each covered with its individual radome. Extensive use of carbon-fibre composite in the housing and array face structures allows for low mass compared with conventional antenna structures. The active transmit/receive modules feature a custom-designed gallium-arsenide chip-set. Modules are fully controllable in amplitude and phase at element channel level, providing accurate and flexible control of antenna beam patterns. The antenna incorporates an novel efficient air cooling system: fans drive cold air into the void between the two array faces which is then forced through small holes in the modules covers directly on the devices to be cooled. A built-in automated calibration system facilitates rapid return to full operating conditions after periodic replacement of failed modules. Sub-array processing, via a high-speed data link (in excess of 20 Gbits/s) allows responsive/adaptive beamforming at sub-array level.