Catalog excerpts

ea7401m - 1

Company Confidential Type Specification The EA7401M is the latest offering from Easat and uses production techniques developed from cellular radio technology to provide excellent RF performance. Adopting technology from the antenna which is being supplied to the FAA' as part of the ASDE-X program, the 'M' designation depicts the EA7401M's ability to operate with single, dual or dual diversity magnetron based transceiver systems. The antenna offers sub 0.33° azimuth 3dB beamwidth giving excellent range and azimuth resolution and provides operation with 40ns pulse width without pulse distortion. The antenna also offers zero squint with frequency, making it particularly suitable for use with frequency agile and frequency diverse systems. Offering a high standard specification, the antenna includes circular polarisation for weather penetration and inverse cosec2 beam shaping to minimise effects of rain clutter. Additionally, coverage down to -40° below the horizon, low weight and low noise make the EA7401M ideal for mounting on top of Visual Control Rooms. Key features include:  Parallel feed array – no squint with frequency  Low cost of ownership  Sub 0.33º azimuth beamwidth  Low wind resistance 2  Circular polarisation and Inverse Cosec beamshape  Wide bandwidth General & Mechanical Environmental Type Linear Array 150 km/hr (operational) Wind Speed Nominal dimensions (m) 7 x 0.25 x 0.5 240 km/hr (survival) Total weight (incl. turning gear & 350 Temperature -30ºC - + 60ºC motor) (kg) Stand Weight (steel) (kg) 100 Humidity Up to 100% Height incl. Pedestal & stand (m) 1.35 Altitude SL to 2500 m Suitable for Coastal Max Swept radius (m) 3.7 Protection Environment. Rotation rate (typical) 60 rpm Design Life 20 years Electrical Specification Beam Characteristics 'X' Band, Squintless, operating between 9.0 - 9.5 GHz Gain 35.5 dBi at 9.5GHz Option 1) ≤1.3:1 @ 2 spot frequencies within the operating frequency VSWR Option 2) ≤1.4:1 over a selected 200MHz band Azimuth 3dB Beamwidth 0.32º nominal Within ±10° Backlobes Azimuth Sidelobes ≤ -26dB ≤ -40dB Elevation Beamshape Inverse Cosec2 to -40º below horizon Elevation 3dB Beamwidth 15° ± 4° ICR ≤ -17dB in Az. and El. planes Polarisation Circular Options Single or dual 4096 or 8192 count encoders; gearbox heaters. Specifications are subject to change as part of Easat’s ongoing improvement policy. Customers are advised to confirm specification prior to contract ___________________________________________________________________________________ Easat Antennas Ltd, Goodwin House, Leek Road, Hanley, stoke on Trent, Staffordshire, ST1 3NR, UK Easat RadarTel/Fax: +44 (0)1782 208028/208060 Ivy House Road, Hanley, Stoke-On-Trent, ST1 3NW, England Systems Ltd, Unit 1 Jubilee Site, email: antenna@easat.co.uk Web: www.easat.co.uk EA7401M Linear Fax: Antenna ©Easat Antennas Ltd Rev 5 / Sep Website: www.easat.com Telephone: +44 (0)1782 208028 Array +44 (0)1782

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