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VHF/UHF/L-Band Antenna

30 to 512 MHz & 960 to 2500 MHz

SKU: 21-50-318

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VHF/UHF/L-Band Antenna

The 21-50-318 is a high speed passive blade antenna providing full VHF, UHF and L-band performance in a double raked, low RCS design. Intended as a bolt on replacement for existing UHF/L-band and VHF/ UHF/L-band antennas, this antenna is built using a high temperature resin/glass composite radome encapsulating a wide band, specially contoured radiating element. A high isolation diplexer is built into the machined aluminium base, allowing simultaneous operation of LOS Communications and L-Band/Data link systems such as JTIDS, MIDS and IFF. Lightning and P-static protection is provided by all elements being DC grounded. 

  • Swept back blade
  • Isolated V/UHF and L-band outputs
  • Suitable for Mach 2+
  • Gain in UHF and L-band similar to stand-alone blades
  • Nominally Omni pattern thru band
  • Drop on replacement for NSN 5985-01-329-4335
  • Designed to MIL-STD-810 environmental conditions
21-50-318
Model # 21-50-318
Brand Cooper Antennas
Frequency

30-174 MHz

225-512 MHz

960-2500 MHz 

Gain

30 MHz ≥ -26 dBi

88 MHz ≥ -14 dBi

174 MHz ≥ - 4 dBi

225-410 MHz 0 dBi average

960-2500 MHz 0 dBi average 

VSWR

30 - 88 MHz ≤ 2.7

108 - 174 MHz ≤ 2.7

225 - 360 MHz ≤ 2.0

360 - 410 MHz ≤ 2.2

410 - 512 MHz ≤ 3.5

960 - 2500 MHz ≤ 2.0

Impedance (nominal) 50 Ohms
Power

VHF/UHF : 25 Watts CW 100 Watts peak

L-Band : 2 KW Peak at 0.004 duty cycle 

Polarization Vertical
Radiation Pattern Nominally Omni-directional in azimuth, see typical plots on 20” radius fuselage section 
Isolation Between V/UHF and L-band (bi-directional) ≥ 50 dB
Antenna RF Connector

SC Female L-band

TNC Female V/UHF

Overall Height 13 inches (330mm) maximum
Weight 2.6lbs (1.2kg) maximum 
Fixing Holes 8 hole

Finish

  • Antenna - Urethane Matt Grey Fed-Std-595 36320
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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