Cobham Antenna Systems

More documents

Recommendations

Info

<strong>Antenna</strong> Types Omni - Vertical Polarisation OA and VOA series Omni, Vertical Polarisation An omni antenna is defined as one that radiates full power 360° in the horizontal plane with peak gain, usually on the horizon. All collinear omni antennas are centre-fed making them ground-plane independent and providing stable radiation patterns across the band. High gain omnis can be produced by stacking and feeding more elements. This has the effect of reducing the elevation beamwidth. By adjusting phase and amplitude to each element, sidelobes can be controlled and the elevation beam can be shaped to provide other features such as null-fill or electrical tilt. Collinear antennas combine light weight construction and environmental protection with rigid glass fibre radomes and aluminium mounting spigots. Elevation patterns for omni antennas, illustrates gain versus beamwidth performance - VOA and OA series - Gain up to 11dBi - Frequencies up to 18GHz - Centre fed to ensure peak gain remains on the horizon - Stable, ground-plane independent radiation patterns - Light weight but rugged, for harsh environments - For special applications horizontally polarised high gain omnis can be developed VOA4-1400/1130 VOA4-1800/1319 OA4-2.0V/1375 OA4-2.4V/1369 VOA7-36/1146 OA8-5.1V/9505 14 OA4 - 4dBi OA7 - 7dBi OA10 - 10dBi Left to right: OA2-2.4V/1392 page 59 VOA7-36/1146 page 70 OA4-2.5V/1542 page 59
Omni - Circular Polarisation OA, RCO and LCO series Omni, Circular Polarisation Hemi Omni Many RCOapplications and OA series benefit from circular polarisation to optimise performance, in particular ground to airborne applications. Hemi omni HOA series Circular polarised omni antennas are available with: - Frequencies 400MHz to 14GHz - Left or right circular polarisation - Good axial ratios - Bandwidths up to 15% DSO3-24-54/1177 page 64 HEMI-OMNI HOA series Hemi omni antennas provide coverage over a hemisphere and is suited for applications that require a single antenna to cover a very wide area such as links to satellites and airborne platforms, as well as air to ground links when inverted. - Circular or dual circular polarisation - 2 to 3dBiC peak gain overhead - 120° to 150° beamwidth - Active or passive HOA2-159L-GPS/1486 page 46 Elevation patterns for circular polarised omni and hemiomnis illustrating the relationship between peak gain and angular coverage RCO3-1394/394 HOA3-1.5RL/1436 HOA2-1.6L/1404 HOA2-159L-GPS/1486 LCO5-3450-M01/1434 HOA3-159L-ACT/1544 RCO3 RCO5 RCO7 RCO10 HOA2 15
Page 1 and 2: Cobham Antenna Systems Microwave An
Page 3 and 4: Kent Police security field trials B
Page 5 and 6: Design service, test, manufacture,
Page 7 and 8: Antenna Primary Specification HPBW
Page 9 and 10: Antenna Primary Specification RETUR
Page 11 and 12: Sector Antennas SA, MSA series Sect
Page 13: Planar Spiral PSA series Cavity-bac
Page 17 and 18: Blade SBA Series Blade Where Blade,
Page 19 and 20: Ultra Wideband Omni Multi-stacked M
Page 21 and 22: Structures Assemblies of omni-direc
Page 23 and 24: Group 1 - 250MHz to 1GHz UAV Antenn
Page 25 and 26: Group 1 - 250MHz to 1GHz Directiona
Page 27 and 28: Group 1 - 250MHz to 1GHz Omni Model
Page 29 and 30: Group 1 - 250MHz to 1GHz Omni Model
Page 31 and 32: Group 2 - 1GHz to 2GHz Directional
Page 37 and 38: Group 2 - 1GHz to 2GHz Sector SECTO
Page 39 and 40: Group 2 - 1GHz to 2GHz Omni OMNI OM
Page 41 and 42: Group 2 - 1GHz to 2GHz Omni EVD2-14
Page 43 and 44: Group 2 - 1GHz to 2GHz Omni HDA-180
Page 45 and 46: Group 2 - 1GHz to 2GHz Omni Model F
Page 53 and 54: Group 3 - 2GHz to 3GHz Sector Model
Page 55 and 56: Group 3 - 2GHz to 3GHz Sector Model
Page 65 and 66:
Group 4 - 3GHz to 4GHz Directional
Page 67 and 68:
Group 4 - 3GHz to 4GHz Sector Model
Page 69 and 70:
Group 4 - 3GHz to 4GHz Omni Model F
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Group 5 - 4GHz to 6GHz Sector Model
Page 77 and 78:
Group 5 - 4GHz to 6GHz Omni Model F
Page 79 and 80:
Group 6 - 6GHz and over Directional
Page 81 and 82:
Group 6 - 6GHz and over Omni Model
Page 83 and 84:
Ultra Wideband and Extended Perform
Page 85 and 86:
Ultra Wideband Directional Model Fr
Page 87 and 88:
Accessories Mounting Kits Model Des
Page 89:
Cobham Antenna Systems Microwave An
show all

Cobham Antenna Systems

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?