21-4

VHF Whip Antenna

21-4 Datasheet

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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

Mechanical Specs

Full Dimensions LxWxH mm: 23 x 23 x 562
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
Standards: DO-160

21-4 Datasheet

14043 (2)

Get in touch

Chelton Limited, Marlow HQ

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

T: +44 (0)1628 472072

Contact us to discuss your requirements!

Speak to our Sales or Engineering teams