CBF-20A-1250 SQ
DIRECTIONAL COUPLERS
REV: 001, 04/18/02
• SPACE QUALIFIED
• 100 - 2000 MHz DIRECTIONAL COUPLER
• INTERNALLY TERMINATED REVERSE PORT
TECHNICAL DESCRIPTION / APPLICATION
The CBF-20A-1250 SQ Directional Coupler covers 100 - 2000 MHz with a special luꢁped eleꢁent design
to reduce size, while ꢁaintaining high perforꢁance. Parts, ꢁaterials and processes are in accordance with
Merriꢁac docuꢁent CENG-0001, “Standard Design Requireꢁents for Space Qualified Devices”.
GENERAL SPECIFICATIONS
MODEL
FREQUENCY
RANGE
COUPLING
INSERTION LOSS
DIRECTIVITY
VSWR
dB
NUMBER
dB
MHz
dB
MAX.
1.5
MIN.
18
MAX.
1.7:1
CBF-20A-1250 SQ
100 - 2000
20
1
FREQUENCY SENSITIVITY
dB
CW POWER RATING
WEIGHT
MAIN LINE
MAX.
MAX.
MAX.
0.5
1 WATT
2.8 g
PACKAGE OUTLINE
.312 .030
.385 0.020
[9.78 .508ꢀ
.150 MAX.
[3.81ꢀ
[7.92 0.76ꢀ
(TYP)
*.350 TYP.
[8.89ꢀ
.510 0.020
[12.94 0.508ꢀ
*.250 TYP.
[6.35ꢀ
*.100 TYP.
[2.54ꢀ
*.080 TYP.
[2.03ꢀ
5
*.015 0.005
[0.38 0.127ꢀ
TYP. 8 PINS
*.050 0.015
[1.27 0.381ꢀ
NOTES:
1. TOLERANCE ON 3 PLACE DECIMALS .010 [.25ꢁꢁꢀ EXCEPT AS NOTED. 5. ALL LEADS TO BE WITHIN .010 [.25ꢁꢁꢀ OF EACH OTHER AT THIS DIMENSION.
2. MAX. IS LARGEST DIMENSION ALLOWED.
3. DIMENSIONS = INCHES [ꢁꢁꢀ
6. DIMENSIONS MARKED WITH * APPLY ONLY AT BODY.
7. ALL UNMARKED PINS ARE CASE GROUND.
4. METRIC EQUIVALENTS ARE TO THE NEAREST .01 ꢁꢁ.
Merrimac Industries, RF & Microwave Products Division / 41 Fairfield Place, West Caldwell, NJ 07006
Tel: 973.575.1300 / Fax: 973.575.0531 / Internet: www.Merrimacind.com