C/D Band Airborne Blade Antenna

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The 21-40-12 is a C/D (L-Band) airborne blade antenna designed for high performance aircraft and covering MIDS as well as TACAN and IFF frequencies. It is a direct footprint replacement for AT256 UHF Blade antennas. Electrical design is based on a 2-dimensional, shunt-grounded discone which is of high efficiency and provides nearly omnidirectional azimuthal radiation.

Mechanical design uses an advanced, glass-loaded thermoplastic radome with an integral radiating element, all foamed-in-place for structural and environmental integrity.

The blade has an aluminum alloy base with a centrally mounted, TNC-type female coaxial connector.

Covers LINK 16, IFF, TACAN, JTIDS & MIDS
Low profile, diamond shaped blade
Designed to meet MIL-STD-810
Fully Environmentally sealed
Grounded for P- static protection
Lossless matching - high RF efficiency
Omnidirectional radiation pattern

	21-40-12
Model #	21-40-12
Brand	Cooper Antennas

Frequency	960 - 1220 MHz
Gain (average)	Typically +4 dBi
VSWR	≤ 1.8:1 (960 - 1220 MHz) ≤ 1.5:1 (1020 - 1100 MHz)
Impedance (nominal)	50 Ohms
Power	200 Watts CW, 4 KW peak
Polarization	Vertical
Radiation	Omni-directional in azimuth, similar To stub in elevation
Antenna RF Connector	TNC Female