21-4

VHF Whip Antenna

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21 4

VHF Whip Antenna - 21-4

The 21-4 Series antennas are linearly polarised, monopole antennas with wide band frequency characteristics intended for general communication and homing applications. Being of semi-rigid form, it is suitable for external fitting upon helicopters and fixed wing aircraft with a performance up to 350 kts EAS, and other similar applications. The antenna can be installed by single hole fixing and allows orientation of the coaxial connector through 360°. The antenna can be mounted true or raked using the angled spacers provided.

  • General Purpose Whip Antenna
  • TNC and BNC options available
  • Straight or raked
  • Several bandwidth options available

Specifications

  • Electrical Specs
  • Mechanical Specs
  • Standard Specs

Electrical Specs

Minimum Frequency
118
Maximum Frequency
137
Impedence
50
Return Loss VSWR
2.5:1 max (raked configuration)
Gain
≤ +2 dBi (avg)
Polarization
Vertical
Radiation Pattern Azimuth
Omnidirectional
Radiation Pattern Elevation
As per Stub
Peak Power Watts
Average Power Watts

Mechanical Specs

Full Dimensions LxWxH mm
23 x 23 x 562
Height Above Base Plate mm
Mass kg
0.14
Connector Type
BNC Female or TNC Female

Standard Specs

Altitude ft
25000
Continuous Operating Temperature Min - C
45
Continuous Operating Temperature Max C
70
Vibration
DO-160C Section 8 Curve Y
Lightning
Standards
DO-160
14043 (2)

Get in touch

Chelton Limited, Marlow
The Chelton Centre
Fourth Avenue
Marlow
Buckinghamshire
SL7 1TF
United Kingdom
CAGE Code: U1907