Combined VHF/L-Band Antenna for Supersonic Aircraft

Service Description

End Product + Design Documents + Production Documents

116 MHz to 174 MHz – 960 MHz to 1220 MHz

The aircraft antenna is a high-performance VHF/L-band antenna designed for supersonic airborne applications, covering frequency ranges from 116–174 MHz and 960–1220 MHz.

It features a broadband radiating element with frequency-dependent reactive and resistive loading to optimize gain and ensure VSWR compliance. A built-in VHF/L-band diplexer, housed in a sealed aluminum base block, provides 50 dB of isolation between the two bands.

The antenna is constructed with a high-strength, high-temperature CE9000 composite blade (per FMS1023) in an aerofoil shape, supporting the radiating element. An aluminum alloy baseplate houses the matching circuitry and integrates the diplexer box with its coaxial connectors.

Features

High Strength blade for extreme vibration and side load acceptance
Footprint compatible with existing VHF and UHF/L-band blades
50 dB isolation
Covers IFF/JTIDS/MIDS/TACAN and VHF comms.
Designed to meet MIL-STD-810 B environmental conditions for fighter aircraft

Gain

116 MHz: ≥ -13 dBi
130 MHz: ≥ -8 dBi
150 MHz: ≥ -3 dBi
174 MHz: ≥ 0 dBi
960-1220 MHz: ≥ +2dBi

VSWR

≤ 2.5:1 VHF
≤ 2.0:1 960-1220 MHz
≤ 1.8:1 1020-1100 MHz
Impedance (nominal): 50 Ohms

Power

• 45 Watts CW max (VHF)
• 2KW peak, 100W ave. L-band

Polarization: Predominantly vertical when mounted vertically

Radiation: Essentially omni-directional in azimuth plane

Antenna RF Connector: TNC Female VHF, N type female L-band

Height: 9.5 inches max (242mm)
Weight: 3.5 lbs (1.59kg)
Base Length: 7.63 inches max (194mm)
Fixing Holes: 8 x 0.208 inch (nom) diameter 100° countersunk