Port Surveillance Radar - EA7401M Linear Array

The Easat EA7401M linear array antenna is ideal for Vessel Traffic Management Systems and other surveillance radars for coastal and port applications.

Operating in the marine and port X-band frequency range, this antenna uses techniques developed from cellular radio technology to provide a unique cost-effective combination of RF performance, compact size and low weight, at an attractive price.

The antenna provides an exceptional azimuth beamwidth of 0.32 degrees. This tight beam allows superior azimuth resolution and helps to enhance accuracy. This is important in crowded waterways, where high resolution enables the system to differentiate between small and large vessels. An example is in a security or border control scenario, where small vessels may try to ‘hide’ behind larger targets in busy traffic lanes. It is equally important where a traffic lane is distant from the shore and the system is providing essential safe-passage monitoring.

Uniquely for an antenna of this cost level, the design of the array is dispersionless” – that is, the antenna is equally capable of transmitting very short (< 40 ns) pulse and long pulse without change in performance. The short-pulse capability enables high resolution and clutter reduction on short-range targets, a level of performance not possible with conventional large-slotted waveguide antennas.

The Easat EA7401M antenna also offers exceptional inverse cosec2 elevation beam shaping, thereby enabling both long and short-range targets to be detected from the horizon to -40º below the horizon. This antenna provides unrivalled performance for tracking targets close to the radar location. The antenna is offered in either fixed circular or fixed horizontal polarisation to meet varying customer needs.

Click here to download a PDF for EA7401M Linear Arrary - Technical Specifications