18-12

V/UHF Whip Antenna

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18 12

V/UHF Whip Antenna - 18-12

The 18-12 antenna is a high performance, broadband whip antenna designed for specific use over the frequency band 30 MHz to 400 MHz. It is designed predominately for use on helicopters. The 18-12 antenna employs a whip element primarily for use at VHF together with a parasitically excited sleeve monopole designed for operation over the UHF band. Decoupling techniques are incorporated to avoid deleterious interaction and preserve high performance throughout all operating bands. A frequency dependant matching network is fitted to ensure acceptable low band VSWR with minimum loss of gain.

  • Lightweight
  • Height 1067mm (42 inches)
  • Gain ≤ -12dBi at 30MHz
  • Helicopter applications
  • TNC connector

Specifications

  • Electrical Specs
  • Mechanical Specs
  • Standard Specs

Electrical Specs

Minimum Frequency
30
Maximum Frequency
400
Impedence
50
Return Loss VSWR
30 to 88 MHz: 2.5:1
Gain
30 to 88 MHz: -12 dBi to -6 dBi
Polarization
Vertical
Radiation Pattern Azimuth
Omnidirectional
Radiation Pattern Elevation
Peak Power Watts
Average Power Watts

Mechanical Specs

Full Dimensions LxWxH mm
122 x 94 x 1067
Height Above Base Plate mm
Mass kg
1.13
Connector Type
TNC Female

Standard Specs

Altitude ft
15000
Continuous Operating Temperature Min - C
40
Continuous Operating Temperature Max C
55
Vibration
MIL-E-5400T, Curve IIIb
Lightning
Standards
MIL-STD-810
14043 (2)

Get in touch

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