Conformal IFF Antenna

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The 21-40-02 is a small diameter conformal airborne IFF antenna, principally intended for helicopter installations where its broad elevation beam provides excellent radiation coverage over the entire hemisphere below the helicopter.

Designed as a notch-feed annular slot, the antenna uses a lightweight aluminum alloy dish with foamed-in-place feed network and a fiberglass cover encasing the central radiating element.

The antenna is secured to the airframe with six 10-32 UNF countersunk screws.

Flush Mount
Lightweight
Complies with MIL-STD-810
Designed to NSN 5985-01-124-1538
Excellent IFF radiation pattern
Fully environmentally sealed
Elbow TNC connector

	21-40-02
Model #	21-40-02
Brand	Cooper Antennas

Frequency	1030 MHz and 1090 MHz
Gain	0 dBi minimum
VSWR	≤ 1.5:1
Impedance (nominal)	50 Ohms
Power	100 Watts max
Polarization	Vertical
Antenna RF Connector	BNC Female