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CA-1139 VHF Low Power Multichannel Antenna

The series offers configurations with 2 to 5 channels. Use of these antennas can substantially reduce total space requirements and significantly improve overall system performance.

Each radiator is broadband and covers the entire 115 – 162 MHz band without tuning. Each channel has a separate input and handles RF powers to 50 watts with a VSWR, on 50 ohms, of less than 3.0:1. Pattern coverage is omnidirectional with maximum signal intensity along the horizon. The typical isolation between channels is 15-20 dB.

Because of the inherent broadband characteristics and balanced electrical design, the CA-1139 Series antennas are insensitive to mounting location and surrounding environment. The radome has an integral base mounting flange with coaxial Type N input connectors for each channel, located on the underside.

CA-1139 Series antennas are designed to meet MIL-STD-167, Type I Vibration and the Service Conditions of MIL-STD-810B.

CA-1139 Antenna Specifications

Electrical
Frequency range 225 – 400 MHz
VSWR 2.0:1 nom
Gain 1.5 dB
Polarization Vertical
Azimuth coverage Omnidirectional within ±1 dB
Zenith Coverage Figure-eight dipole pattern with maximum at horizon
RF isolation between channels Consult factory
Power handling 50 watt average, each channel
Mechanical
Input Connector (all models) Type N receptacle, each channel
Finish (all models) White Epoxy Polyamide
  CA-1139-2 CA-1139-3 CA-1139-4 CA-1139-5
No. of Inputs 2 3 4 5
Height (in.) 103 155 204 258
Radome Dia. (in.) 3.5 3.5 5 5
Base Dia. (in.) 6.5 6.5 13 13
Weight (lbs) 20 35 50 65
Mounting (in.) Four 0.5 bolts on 5.5 BC Six 0.5 bolts on 5.5 BC Six 0.5 bolts on 11.75 BC Eight 0.687 bolts on 11.75 BC

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