C-Band Dipole Airborne Antenna

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The 21-40-31 is a bicone dipole of rugged construction for airborne applications where ground plane independent operation is required.

Constructed within a glass-epoxy radome with lightweight aluminum alloy elements, this antenna provides a broad-beam +2 dBi gain elevation pattern ideally suited to data link applications on maneuverable air vehicles.

The antenna is attached to the aircraft with four 10:32 (or similar) countersunk screws and is completely sealed and foam filled for long term reliability and environmental protection.

4 to 5 GHz Bandwidth
Low height, rugged construction
Greater than 2 dBi gain
100 Watts power handling
Designed to MIL-STD-810 environmental conditions
Suitable for use up to Mach 0.85

	21-40-31
Model #	21-40-31
Brand	Cooper Antennas

Frequency	4.0 to 5.0 GHz
Gain	Typically ≥ 2 dBi
VSWR	2:1 max
Impedance (nominal)	50 Ohms
Power	100 Watts CW
Elevation Pattern	As dipole, max gain at horizon ± 10º
Azimuth Pattern	Omni-directional
Antenna RF Connector	TNC Female