NAVIGATION DM NI70 DME/ATC TRANSPONDER ANTENNAS The DM NI70 L-Band antennas offer more than sufficient bandwidth (950 to 1,220 MHz) for use with civil aviation ATC transponders and distance measuring equipment (DME). The antenna provides omnidirectional, vertically polarized coverage when installed on the top, or bottom, of an aircraft. Its streamlined shape assures minimum aerodynamic drag. Structurally, the antenna consists of a single metal element. SPECIFICATIONS ENVIRONMENTAL MECHANICAL ELECTRICAL Frequency Range VSWR 960 - 1220 MHz 1000 - 1100 MHz Gain Polarization Power Radiation Patterns dc Resistance Impedance Weight Connector Finish TSO C66a TSO C74b Drag, Sea Level at 250 mph Specifications subject to change without notice. 960 - 1220 MHz Less than 1.7:1 Less than 1.5:1 Equivalent to a quarter wave stub Vertical 2 kW peak Omnidirectional Open Circuited 50 Ohms 0.25 lbs DM NI70-1, DM NI70-3 Type C Female DM NI70-2 Type BNC Female White ENV. CAT. JAJXXXX ENV. CAT. JAJXXXX CAT. II 0.5 lbs 1000-110 (M68) NAVIGATION DM NI70 DME/ATC TRANSPONDER ANTENNAS 1.10 OUTLINE DIMENSIONS Inches (Centimeters) CONNECTOR TYPE C FEMALE (-1, -3) 0.65 40 2.20 0.88 3.60 DM NI70-1 DM NI70-2 1.75 5.25 MOUNTING HOLE PATTERNS 3.625 0.82 1.80 + + + 1.000 + + 4 "A" HOLES FOR NO. 8 SCREWS 0.500 0.687 DIA 0.144 DIA HOLE THRU CSK 100 X 0.28 DIA TYP 6 PLACES DM NI70-3 1.250 1.750 0.625 1.250 0.375 FULL R. 3.250 4.500 AIL Systems Inc. 455 Commack Road * Deer Park, NY 11729-4591 631-595-6000 Fax 631-595-6180 http://www.ail.com 0.875