CINCH-SQA-0180-06-SMA-02
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QPS Attenuators
Qualified Parts for Space (QPS) Attenuators
Cinch Connectivity Solutions Midwest Microwave has used its experience of
designing custom space parts for many space programs and QPL parts for many
military programs and introduces standard line of Qualified Parts for Space (QPS)
attenuators. QPS attenuators are built using materials that meet or exceed
1
%
TML (Total Mass Loss) and 0
.
1% CVCM (Collected Volatile Condensable Materials)
requirements as tested per ASTM E595.
QPS attenuators were qualified using qualification testing guided by MIL-DTL-3933
level T qualification. They are available with three standard screening options with
various severity of screening. Custom screening options are available on request.
Midwest Microwave Attenuators Space Flight History
• Emirates
Mars Mission
• Parker
Solar Probe
• Europa
Clipper
• One
Web
• GPS
Satellites
Features
•
Qualification and screening guided by MIL-DTL-3933 level T
•
Meets or exceeds
1
%
T
ML and 0
.
1% CVCM
• Three
standard screening levels available
•
Standard dB values 1, 2, 3, 6, 10, and 20dB
•
Custom dB values from 0 to 20dB available
+1 507.833.8822
belfuse.com/cinch
Specifications
Frequency
DC-18GHz
VSWR
1.07 + 0.015F (GHz)
Attenuation Accuracy
0 dB
+0.3/ -0 dB
1-6 dB
7-12 dB
13-20 dB
2W*
±0.3 dB
±0.5 dB
±0.7 dB
Average Power @25°C
Peak Power
500W**
Operating
T
e
mperature
Weight (max.)
-55°C to +125°C
0.5 oz (14.2 g)
Length, A per drawing
0 to 12dB
0.95” (24.13
mm)
1.08” (27.43
mm)
13 to 20 dB
Notes:
*
Derated linearly to 0.5W at 125°C
** Duty
cycle of 5 x 10
-4
max pulse duration 5µs
Each part marked with date code and serial number
+1 507.833.8822
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3
QPS Attenuators Complete Material List
ITEM QTY
DESCRIPTION
MATERIAL
FINISH/OUTGASSING
1
1
COUPLING NUT
S
T
A
INLESS STEEL PER ASTM-A582.
TYPE 303
PASSIVATED PER SAE AMS2700. METHOD 2
2
1
GASKET
VITON A FLUOROELASTOMER PER
SAE AMS7276
N/A
N/A
3
1
RE
T
A
INING RING
SMA MALE CON
T
A
CT
DIELECTRIC
BERYLLIUM COPPER PER
ASTM-B197. ALLOY C172
4
1
BERYLLIUM COPPER PER
ASTM-B196. ALLOY C173
50 MICROINCHES MIN GOLD PL
A
T
E PER ASTM-B488,
TYPE II. GRADE C. CLASS 1.27
5
2
PTFE TYPE 1. GRADE 1. CLASS B.
PER ASTM D 1710
N/A
6
1
SMA MALE HOUSING
SHIM
S
T
A
INLESS STEEL PER ASTM-A582.
TYPE 303
PASSIVATED PER SAE AMS2700. METHOD 2
PASSIVATED PER SAE AMS2700. METHOD 2
PASSIVATED PER SAE AMS2700. METHOD 2
7
2
S
T
A
INLESS STEEL PER ASTM-A582.
TYPE 303
8
2
BUSHING
S
T
A
INLESS STEEL PER ASTM-A582.
TYPE 303
9
2
EDGE SPRING
CARD SPACER
RESISTOR CARD
CENTER PLUNGER
PLUNGER SPRING
BERYLLIUM COPPER PER
ASTM-B194. ALLOY C172
20 MICROINCHES MIN GOLD PL
A
T
E PER ASTM-B488.
TYPE II. CLASS 0.5. GRADE B OR C.
10
11
12
13
14
15
16
17
18
1
BERYLLIUM COPPER PER
ASTM-B196. ALLOY C173
20 MICROINCHES MIN GOLD PL
A
T
E PER ASTM-B488.
TYPE II. CLASS 0.5. GRADE B OR C.
1
T
A
N
T
A
LUM NITRIDE THIN FILM OVER
ALUMINUM NITRIDE CERAMIC
40 MICROINCHES MIN GOLD SPUTTERED
TERMINALS PER MIL-G-45204, TYPE III. GRADE A
2
BERYLLIUM COPPER PER
ASTM-B194. ALLOY C172
20 MICROINCHES MIN GOLD PL
A
T
E PER ASTM-B488.
TYPE II. CLASS 0.5. GRADE B OR C.
2
BERYLLIUM COPPER PER
ASTM-B194. ALLOY C172
50 MICROINCHES MIN GOLD PL
A
T
E PER ASTM-B488.
TYPE II. GRADE C. CLASS 1.27
1
SMA FEMALE
HOUSING
S
T
A
INLESS STEEL PER ASTM-A582.
TYPE 303
PASSIVATED PER SAE AMS2700. METHOD 2
1
SMA FEMALE
CON
T
A
CT
BERYLLIUM COPPER PER
ASTM-B196. ALLOY C173
50 MICROINCHES MIN GOLD PL
A
T
E PER ASTM-B488.
TYPE II. GRADE C. CLASS 1.27
2
SUPPORT BEAD
U
L
T
EM 1000 PER ASTM D7293
S-PE10111
N/A
A/R
A/R
EPOXY SEAL
3M SCOTCH-WELD 2214 NMF (1-
HOUR CURE @ 125°C)
TML%=0.77, CVCM%=0.02
TML%=0.74, CVCM%=0.04
BLACK MARKING INK
VIDEOJET 16-5900 (1-HOUR MIN
CURE @ 175 °C)
+1 507.833.8822
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4
Screening level A
•
Recommended for non-flight applications
•
Thermo-vacuum chamber testing
•
Pre-flight testing
•
Pre-flight system evaluation
T
e
st Method per
T
e
st Sequence
Inspection Name
ATP-09417-60-02*
Sample Size
1
2
3
Parts and Assembly Verification (PAV)
VSWR & Attenuation
4.5
4.6.2
4.1
100%
Stability of Attenuation: After Peak Power
Visual and Mechanical Inspection
4
4.13
* Available
upon request
Standard part numbers with Level A screening
SQA-0182-01-SMA-02, Space qualified attenuator, SMA male to SMA female, 1dB, 18 GHz, 2W, stainless steel, level A
SQA-0182-02-SMA-02, Space qualified attenuator, SMA male to SMA female, 2dB, 18 GHz, 2W, stainless steel, level A
SQA-0182-03-SMA-02, Space qualified attenuator, SMA male to SMA female, 3dB, 18 GHz, 2W, stainless steel, level A
SQA-0182-06-SMA-02, Space qualified attenuator, SMA male to SMA female, 6dB, 18 GHz, 2W, stainless steel, level A
SQA-0182-10-SMA-02, Space qualified attenuator, SMA male to SMA female, 10dB, 18 GHz, 2W, stainless steel, level A
SQA-0182-20-SMA-02, Space qualified attenuator, SMA male to SMA female, 20dB, 18 GHz, 2W, stainless steel, level A
Custom Part numbers for other dB values with Level A screening
SQA-0182-XX-SMA-02, replace XX with dB value from 0 dB to 20 dB in 1 dB increments, use leading 0 for single digit values, such as 01 for 1dB
+1 507.833.8822
belfuse.com/cinch
5
Screening level B
•
Absolute minimum testing recommended for space flight applications
• Cost
effective space attenuator option
• Low
orbit satellite
T
e
st Method per
T
e
st Sequence
Inspection Name
ATP-09417-60-02*
Sample Size
1
2
3
Thermal Shock
4.2
4.5
Parts and Assembly Verification (PAV)
Pre-Conditioning Electrical
DC Resistance
4.6
4.6.1
4.6.2
4.7
VSWR & Attenuation
4
Conditioning
100%
5
Post-Conditioning Electrical
DC Resistance
4.8
4.8.1
4.8.2
4.1
VSWR & Attenuation
6
7
Stability of Attenuation: After Peak Power
Radiographic Inspection
Visual and Mechanical Inspection
4.11
4.13
8
* Available
upon request
Standard part numbers with Level B screening
SQA-0181-01-SMA-02, Space qualified attenuator, SMA male to SMA female, 1dB, 18 GHz, 2W, stainless steel, level B
SQA-0181-02-SMA-02, Space qualified attenuator, SMA male to SMA female, 2dB, 18 GHz, 2W, stainless steel, level B
SQA-0181-03-SMA-02, Space qualified attenuator, SMA male to SMA female, 3dB, 18 GHz, 2W, stainless steel, level B
SQA-0181-06-SMA-02, Space qualified attenuator, SMA male to SMA female, 6dB, 18 GHz, 2W, stainless steel, level B
SQA-0181-10-SMA-02, Space qualified attenuator, SMA male to SMA female, 10dB, 18 GHz, 2W, stainless steel, level B
SQA-0181-20-SMA-02, Space qualified attenuator, SMA male to SMA female, 20dB, 18 GHz, 2W, stainless steel, level B
Custom Part numbers for other dB values with Level B screening
SQA-0181-XX-SMA-02, replace XX with dB value from 0 dB to 20 dB in 1 dB increments, use leading 0 for single digit values, such as 01 for 1dB
+1 507.833.8822
belfuse.com/cinch
6
Screening level C
•
Highest level of screening, recommended for all space flight applications
•
Screening compatible to MIL-DTL-3933 level T
•
Recommended for all orbits and for deep space missions
•
As little as 10 weeks lead time
T
e
st Method per
T
e
st Sequence
Inspection Name
ATP-09417-60-02*
Sample Size
1
2
3
4
5
6
7
8
VSWR & Attenuation
4.1
4.2
Thermal Shock
VSWR & Attenuation
4.1
Random Vibration
4.3
VSWR & Attenuation
4.1
Monitored Thermal Cycling
Parts and Assembly Verification (PAV)
Pre-Conditioning Electrical
DC Resistance
4.4
4.5
4.6
4.6.1
4.6.2
4.7
VSWR & Attenuation
100%
9
Conditioning
10
Post-Conditioning Electrical
DC Resistance
4.8
4.8.1
4.8.2
4.9
VSWR & Attenuation
11
12
13
14
Peak Power
Stability of Attenuation: After Peak Power
Radiographic Inspection
VSWR & Attenuation + Review
Visual and Mechanical Inspection
4.1
4.11
4.12
4.13
15
* Available
upon request
Standard part numbers with Level C screening
SQA-0180-01-SMA-02, Space qualified attenuator, SMA male to SMA female, 1dB, 18 GHz, 2W, stainless steel, level C
SQA-0180-02-SMA-02, Space qualified attenuator, SMA male to SMA female, 2dB, 18 GHz, 2W, stainless steel, level C
SQA-0180-03-SMA-02, Space qualified attenuator, SMA male to SMA female, 3dB, 18 GHz, 2W, stainless steel, level C
SQA-0180-06-SMA-02, Space qualified attenuator, SMA male to SMA female, 6dB, 18 GHz, 2W, stainless steel, level C
SQA-0180-10-SMA-02, Space qualified attenuator, SMA male to SMA female, 10dB, 18 GHz, 2W, stainless steel, level C
SQA-0180-20-SMA-02, Space qualified attenuator, SMA male to SMA female, 20dB, 18 GHz, 2W, stainless steel, level C
Custom Part numbers for other dB values with Level C screening
SQA-0180-XX-SMA-02, replace XX with dB value from 0 dB to 20 dB in 1 dB increments, use leading 0 for single digit values, such as 01 for 1dB
+1 507.833.8822
belfuse.com/cinch
7
Qualification Testing
Qualification testing performed on QPS attenuators was guided by MIL-DTL-3933 level T and consisted of the tests indicated.
MIL-DTL-3933
INSPECTION NAME
MIL-DTL-3933 METHOD
REQUIREMENTS
Sample Size
Group 1 Stability of Attenuation 1/
With
T
e
mperature Change
After Thermal Shock
After Vibration
4.7.11.1
4.7.11.2
4.7.11.3
4.7.11.4
4.7.11.5
4.7.11.6
4.7.11.7
4.7.11, 3.5.10
4.7.11, 3.5.10
4.7.11, 3.5.10
4.7.11, 3.5.10
4.7.11, 3.5.10
4.7.11, 3.5.10
4.7.11, 3.5.10
After Shock
5
After Moisture Resistance
After Salt Atmosphere
After Peak Power
Group 1 Extended MTC
4.7.2.5
Extended MTC 2/
3.5.1.5
5
5
Group 1 Sensitivity of Attenuation 1/
With Change in Frequency
With Change in Power
4.7.12
4.7.12
4.7.12
4.7.10
4.7.1
3.5.11
3.5.11
3.5.11
With Change in
T
e
mperature
Resistance to Solvents
3.5.9
Visual and Mechanical Inspection 3/
3.1, 3.3, 3.4, 3.6, 3.8
Group 2
Life
T
e
st
4.7.13
4.7.2.2.1
4.7.4, 4.7.5
3.5.12
3.5.1.4
DC Resistance & Change
VSWR & Attenuation
5
3.5.3, 3.5.4
Group 3 1/
Sensitivity of Attenuation: With
Change in
T
e
mperature
4.7.12
3.5.11
Coaxial Connector Repeatability
VSWR & Attenuation
4.7.7
4.7.4, 4.7.5
4.7.6
3.5.6
3.5.3, 3.5.4
3.5.5
EMI/RF Leakage 4/
Force to Engage/Disengage
Coupling Proof
T
o
rque
Force to Engage/Disengage
VSWR & Attenuation
4.7.14
3.5.13
5
4.7.15
3.5.14
4.7.14
3.5.13
4.7.4, 4.7.5
4.7.2.2.1
4.7.1
3.5.3, 3.5.4
3.5.1.4
DC Resistance
Visual and Mechanical Inspection 3/
3.1, 3.3, 3.4, 3.6, 3.8
Notes:
1/: Use performance limits of MIL-DTL-3933 Appendix B Class IV where applicable. The reference frequency shall be 8 GHz.
2/: Number of cycles shall be 100.
3/: Required marking shall be defined by the outline & assembly drawings.
4/: RF leakage shall be at least 80 dB below the incoming signal level.
For more information and custom options please contact Midwest Microwave product manager Tibor Urbanek at
North America
+1 507.833.8822
belfuse.com/cinch
ds-ccs-mwm-qps-attenuators-10022020
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