Fixed Coaxial Attenuators Model 279 Medium Power, SMK Connectors dc to 40.0 GHz 10 Watts TEST DATA: Swept data plots of attenuation and SWR from 50 MHz to 40 GHz. CONNECTORS: SMK (2.92mm) Male/Female connectors - mate nondestructively with SMA per MIL-C-39012, 3.5mm and other 2.92mm connectors. Connector Options 1 2 SMK (2.92mm), Female SMK (2.92mm), Male CONSTRUCTION: Black, finned aluminum body, gold plated beryllium copper contacts. Features o o o Type/Description WEIGHT: 200 g (8.0 oz.) maximum Compact Construction - Lowest size/power ratio. Precision injection molded connectors. Designed to meet environmental requirements of MIL-DTL-3933. PHYSICAL DIMENSIONS: Specifications NOMINAL IMPEDANCE: 50 Ω FREQUENCY RANGE: dc to 40.0 GHz MAXIMUM DEVIATION OVER FREQUENCY: Nominal ATTN (dB) Deviation (dB) 6, 10, 20, 30 Dash No. 11 12 21 22 + 1.5 Connector Type SMKFemale/Female SMK Female/Male SMK Male/Female SMK Male/Male DIM A MAXIMUM SWR: Frequency (GHz) SWR dc - 18 18 - 40 1.20 1.35 POWER RATING (mounted horizontally): 10 watts average (unidirectional) to 25°C ambient temperature, derated linearly to 2 Watts @ 125°C. 200 watts peak (5 μsec pulse width; 5% duty cycle). Maximum power into output port is 5 Watts. POWER COEFFICIENT: <0.002 dB/dB/watt TEMPERATURE COEFFICIENT: <0.0004 dB/dB/°C NOTE: All dimensions are given in mm (inches) and are nominal, unless otherwise specified. MODEL NUMBER DESCRIPTION: Example: 279 - XX - XX Basic Model Number Attenuation Value (dB) Connector Options -11 -12 -21 -22 Female/Female Female/Male Male/Female Male/Male TEMPERATURE RANGE: -55 °C to 125 °C 5305 Spectrum Drive, Frederick, MD 21703-7362 s TEL: 301-846-9222, 800-638-2048 s Fax: 301-846-9116 web: www.aeroflex.com/weinschel s email: [email protected] Revision Date: 2/22/2013