Challenger 4.5m C, Ku-Band Prime Focus Satellite Antenna
The Challenger 4.5m Prime Focus Satellite Antenna delivers reliable, high-gain performance for C and Ku-band receive-only or transmit/receive applications. Designed for fixed and motorized earth station use, this robust system features multi-feed support and 125 mph wind survival capability.
The 4.5m reflector is constructed from 16 precision die-formed aluminum petals, achieving 0.020" RMS surface accuracy. The high-diffusive white powder-coated finish ensures long-lasting corrosion resistance. The system is available with Az/El head, King Post (fixed or motorized), or Az-El fixed pipe mounts. All hardware is stainless steel or hot-dip galvanized for durability in harsh environments.
Built in the USA, this antenna system supports continuous 360° azimuth and ±90° polarization rotation, with options for 1- or 2-port linear or circular polarization. Ideal for broadcast, teleport, and hub operations requiring rugged and accurate multiband connectivity.
Key Features
- 4.5m segmented prime focus antenna with 0.020" RMS surface accuracy
- Supports C-band and Ku-band operation with linear or circular polarization
- Motorized and fixed King Post, Az/El Head, and fixed pipe mounts available
- Multi-feed capable – supports up to 4 feeds
- 360° azimuth rotation and ±90° polarization adjustment
- Factory-formed die-cast aluminum reflector petals
- Corrosion-resistant powder-coated aluminum with galvanized steel pedestal
- Wind survival rating up to 125 mph (200 km/h)
- Made in the USA
Technical Specifications
- Reflector Size: 4.5 meters
- Reflector Construction: 16 die-formed aluminum petals
- Surface Accuracy: 0.020 in. RMS
- Mount Types: King Post (fixed or motorized), Az/El Head, Fixed Pipe
- Azimuth Travel: 360° continuous (Az/El), 132° arc (motorized King Post)
- Elevation Travel: 15° to 90°
- Polarization Rotation: ±90° (manual), 360° continuous (motorized)
- Frequency Ranges (Receive):
- Ku-Band: 10.95–12.75 GHz
- C-Band: 3.625–4.2 GHz
- Midband Gain:
- Ku-Band: 51.9 dBi
- C-Band: 42.7 dBi
- Noise Temperature @10° Elevation:
- Ku-Band: 55K
- C-Band: 50K
- VSWR (Rx): 1.3:1 (Ku), 1.4:1 (C)
- Polarization Isolation: 30 dB (Linear)
- Feed Flanges:
- Ku-Band: WR75
- C-Band: CPR229G
- Operational Wind: 60 mph (100 km/h)
- Survival Wind: 125 mph (200 km/h)
- Operational Temperature: -40°F to 140°F (-40°C to 60°C)
- Survival Temperature: -60°F to 180°F (-51°C to 82°C)
- Rain Load: Operational: 0.5 in/hr; Survival: 3 in/hr
- Ice Load: 1 in radial; 0.5 in with 60 mph gusts
- Weight: Approx. 875 lbs
