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VHF/UHF (SINCGARS/EPLRS) & L-band Spring Mounted Antenna with Detachable element

30 - 88 MHz, 225 -450 MHz & 1250 - 2000 MHz

SKU: 20-50-10-3

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VHF/UHF (SINCGARS/EPLRS) & L-band Spring Mounted Antenna with Detachable element

The 20-50-10-3 is a vertically polarized, omni-directional VHF/UHF/L-Band antenna. It is compatible with radios operating in the 30 to 88 MHz, 225 to 450 MHz and 1250 to 2000 MHz frequency ranges. The antenna can handle 100 Watts of power, has separate VHF, UHF and L-Band coaxial connectors and requires no external tuning.

The antenna comprises a VHF monopole surrounded at its top by a UHF/L-band dipole. Design of the elements is such as to minimize coupling between bands and additional in-line diplexing and filtering is included in the antenna base to achieve between 55 to 75 dB isolation (see over). Radiating elements are totally encased in high strength fiberglass tubing which provides insulation in the event of accidental contact with 10kV RMS (minimum) high voltage power lines. Rugged design ensures reliability in arctic, jungle or equatorial desert environments. The antenna is spring mounted for vehicular use and has a mounting base compatible with standard CECOM mounting brackets, having four 7/16 inch dia. holes on a 4.5 inch circle. 

  • Spring mounted - can be tied down for stowage
  • Fits standard CECOM 4 hole mount
  • Robust weather-proof element detachment joint above spring
  • Designed to sustain 25 mph “Oak Beam” Test
  • 100 Watts CW Power
  • Very high (55-75 dB) isolation between bands
  • Complies with MIL-STD-810 Environmental and MIL-S-901 shock
  • High Voltage protected
  • Omni-directional in azimuth - gain optimized near horizon
20-50-10-3
Model # 20-50-10-3
Brand Cooper Antennas
Frequency

30-88 MHz

225-450

1250-2000 MHz

 Gain

(at horizon on 4’x 4’ ground plane )

30-88 MHz between - 5dBi and -2.5dBi

225-400 MHz ≥ 0dBi

401-450 MHz ≥ 1dBi

1250-2000 MHz between +1dBi to +2dBi (see chart)

VSWR

≤ 3.1 VHF

≤ 3:1 UHF

≤ 2.5:1 L-Band 

Impedance (nominal)  50 Ohms
Power 100 Watts CW
Polarization Vertical
Isolation

VHF to UHF

 

VHF to L Band

 

UHF to L Band

 

30-88 MHz 

225-450 MHz 

30-88 MHz

1200-2000 MHz

225-450 MHz

1200-2000 MHz ≥ 55 dB  

≥ 60 dB

≥ 65 dB

≥ 65 dB

≥ 55 dB 

≥ 75 dB

≥ 55 dB  

 

Antenna RF Connector

BNC Female (VHF)

N Female (UHF)

TNC Female (L-Band) 

Height 72 inches (1828mm) 
Element Diameter 3 inches (75mm)
Weight (approx.) 14.4 lbs (6.5kg) 
Operational Temperature -51°C to +71°C 

Finish

  • Antenna - 383 GREEN, MIL-DTL-14072E(CR), MIL-DTL-53039
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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