DM N56-1

Boeing P/N S220T114-101

The DM N56-1, designed for the Boeing 757 and 767 aircraft, provides a concept that can be incorporated in many aircraft design to provide integral VHF navigation systems performance.

The DM N56-1 free standing, balanced-loop array is mounted on the tip of a vertical stabilizer and covered with a structural fiberglass housing forming the fin tip. This approach provides a lightweight antenna system utilizing available space for maximum efficiency.

The electrical design provides a two receiver operation with performance assured for CAT.III conditions. The omnidirectional radiation patterns in the horizontal plane also assure signal levels are more than required for R-NAV systems use.

Electrical
Frequency Range	108 - 118 MHz
VSWR	6.0:1
Polarization	Horizontal
Radiation Pattern	Omnidirectional
Isolation	3 dB
Impedance	50 Ohms
TSO	C40a, D0106A
Mechanical
Weight	5.25 lbs (2.34 kg)
Connectors	C Male
Part Number	261D1318-1
Boeing Part Number	S220T114-101
Environmental
	D2AD1XXFXXXXXXXX

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