35
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.aeroflex-weinschel.com email: weinschel-sales@aeroflex.com Revision Date: 11/18/08
Fixed Coaxial Attenuators
TEMPERATURE RANGE: -55 °C to 125 °C
TEST DATA SUPPLIED: Sweep SWR/Attenuation data/
plots performed across 0.1-40 GHz frequency range.
CONNECTORS: 2.92mm (Male/Female) connectors -
mate nondestructively with SMA per MIL-C-39012, 3.5mm
and other 2.92mm connectors.
Connector Options Type/Description
1 2.92mm, Female
2 2.92mm, Male
CONSTRUCTION: Black, finned aluminum body, gold
plated beryllium copper contacts.
WEIGHT: 200 g (7.0 oz.) maximum
PHYSICAL DIMENSIONS:
Features
oCompact Construction - Lowest size/power ratio.
oPrecision injection molded connector dielectric.
oDesigned to meet environmental requirements of
MIL-DTL-3933.
oFlat Response.
Specifications
NOMINAL IMPEDANCE: 50 Ω
FREQUENCY RANGE: dc to 40.0 GHz
NOTE: All dimensions are given in mm (inches) and are
nominal, unless otherwise specified.
MODEL NUMBER DESCRIPTION:
Example:
75A - XX - XX*
Model 75A dc to 40.0 GHz
Medium Power Fixed Coaxial Attenuator 5 Watts
Bi-directional Design
Frequency (GHz) SWR
dc - 18 1.25
18 - 40 1.45
MAXIMUM SWR:
Nominal Deviation (dB)
ATTN (dB) dc-18 GHz 18-40 GHz
3+
0.50 + 1.00
6, 10, 20, 30 + 0.80 + 1.50
MAXIMUM DEVIATION OVER FREQUENCY:
Basic
Model
Number
Attenuation
Value (dB)
Connector Options
-11 Female/Female
-12 Female/Male
-22 Male\Male
*Unit is bi-directional and full power may be applied to either connector.
POWER RATING (mounted horizontally): 5 watts aver-
age (bi-directional) to 25°C ambient temperature, derated
linearly to 0.5 Watt @ 125°C. 200 watts peak (5 μsec pulse
width; 1.25% duty cycle).
POWER COEFFICIENT: <0.002 dB/dB/watt
TEMPERATURE COEFFICIENT: <0.0004 dB/dB/°C
Dash No. Connector Type DIM A
11 2.92mm Female/Female 39.9 (1.56)
12 2.92mm Male/Female 44.1 (1.74)
22 2.92mm Male/Male 48.8 (1.92)
