BROADBAND ANTENNA FEED FAMILIES

Seavey Engineering supplies complete sets of high-performance feed systems for large reflectors. These systems typically consist of a multiplicity of interchangeable feeds. Each feed is custom-configured with its own RF chain. The chain may include BIT provisions, filters, LNAs and downconverters. Feeds may also have complex polarization capabilities, such as remote 4-state dual-port switching. In these systems, all feeds are pre-focussed and aligned and have precision common mounting interfaces. Most systems are specified to operate over the full range of frequencies from VHF to Ka-band.

Here are a few typical systems and a list of the Model Numbers of the feeds in each family:

System A is a set of small, lightweight segmented parabolic reflectors with a common F/D ratio and diameters ranging from 2- to 8-feet. Feeds are receive-only and terminate in SMA RF ports. Frequency, GHz Polarization Feed Model No. 1.5 - 2.0 Dual Linear ESA-22X/T12 1.50 - 2.50 Dual Circular ESA-22CX 2.40 - 3.40 Dual Linear ESA-33/1T12 3.40 - 4.20 Remote 4-state ESR-40CX/S1 7.10 - 8.40 Dual Linear ESA-77-2T 10.70 - 13.3 Dual Linear ESA-1111/T5 12.60 - 15.2 Dual Linear ESA-1212-2/15T 17.50 - 22.0 Dual Circular ESA-1818C-2/1T 17.50 - 22.0 Dual Linear ESA-1818-2/1T Model ESA-1111/T5 Model QRA-1020 Model QRA-1020C

System B is a fixed site 24-foot parabolic reflector mounted to a precision tracking pedestal. Feeds are receive-only and include all RF components. Frequency, GHz Polarization Feed Model No. 1.00 - 2.00 Dual Linear QRA-1020 1.00 - 2.00 Dual Circular QRA-1020C 1.50 - 2.50 Dual Linear ESA-22X/STRB 1.50 - 2.50 Dual Circular ESA-22CX/STRB 2.00 - 4.00 Dual Circular QRA-2040 2.00 - 4.00 Dual Circular QRA-2040C 2.40 - 3.40 Dual Linear ESA-33B/STRB 2.40 - 3.40 Dual Circular ESA-33BC/STRB 3.40 - 4.20 Remote 4-state ESR-40CX/STRB 4.00 - 8.00 Dual Linear QRA-4080 4.00 - 8.00 Dual Circular QRA-4080C 7.10 - 8.40 Dual Linear ESA-77-2 7.10 - 8.40 Dual Circular ESA-77C-22/STRB 8.00 - 12.0 Dual Linear ESA-88-2/12STR 8.00 - 12.0 Dual Circular ESA-88C-2/12STR 10.70 - 13.3 Dual Linear ESA-1111-2/STRB 10.70 - 13.3 Dual Circular ESA-1111C-2/STRB 12.00 - 18.0 Dual Circular ESA-1212C/18-STRB 12.60 - 15.2 Dual Linear ESA-1212/15-STRB 12.60 - 15.2 Dual Circular ESA-1212C-2/15-STRB 17.50 - 22.0 Dual Linear ESA-1818-2/STRB 17.50 - 22.0 Dual Circular ESA-1818C-2/STRB1

Model QRA-2040

Model ESA-88C-2/12STR

Model ESA-1212-2/15-STRB