These three antennas, manufactured by European Antennas, all cover the 4.4 to 5.8GHz military C-Band frequency range, and complement each other in terms of specification:
Multi-Sector Antenna - MSA6-4.7V-5.5V/1622
This high specification, dual band, Multi-Sector antenna covers 4.40 to 5.00 GHz and 5.25 to 5.85GHz. There are five sectors, each 70° x 20° and one overhead with 65° x 65°. This antenna is normally for ground communication with mobile or airborne platforms
Omni Antenna - OA4-4.4-5.8V/1623
This high specification, rugged Omni antenna covers 4.40 to 5.80 GHz. This antenna is generally for ground based communication systems.
Omni Antenna - OA4-4.4-5.8V/1662
This Omni antenna with mounting flange also covers 4.40 to 5.80 GHz. This antenna can be mounted on airborne platforms.
European antennas (Cobham Antenna Systems) are specialists in antennas, 250MHz - 40GHz: Flat Panel, Low Profile, Sector, Omni, Dipole, Blade, Spiral & Broadband Antennas for WiFi, WLAN, WiMAX, RFID, Cellular, PMR/Tetra, Multiband, UAV’s, Link16, 4.4-5GHz band, Security/Emergency, Telemetry, Satellite Orbiting/GPS.