V/UHF Whip Antenna – 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
Click to enlarge

Specification

30 Minimum Frequency
400 Maximum Frequency
50 Impedence
30 to 88 MHz: 2.5:1 Return Loss VSWR
30 to 88 MHz: -12 dBi to -6 dBi Gain
Vertical Polarization
Omnidirectional Radiation Pattern Azimuth
122 x 94 x 1067 Full Dimensions LxWxH mm
1.13 Mass kg
TNC Female Connector Type
15000 Altitude ft
40 Continuous Operating Temperature Min - C
55 Continuous Operating Temperature Max C
MIL-E-5400T, Curve IIIb Vibration
MIL-STD-810 Standards