Rev. 1
C T S C O R P O R A T I O N /
M A N U F A C T U R E R O F R E L I A B L E E L E C T R O N I C C O M P O N E N T S
Model KFF6637A
W
IRELESS
C
OMPONENTS
Features:
Small Size
High Performance
SMD
Description and
Applications:
This monoblock Duplexer filter is
primarily designed for US PCS
applications at 1850-1990 MHz.
Ceramic Monoblock
Duplex Filter
Electrical Specifications
Antenna to TX Response
Frequency
Specifications @ 25 C
Insertion Loss
1850 MHz to 1910 MHz
3.6 dB max.
Return Loss
10.0 dB min.
Rejection @ RX Band
1930 MHz to 1990 MHz
37.0 dB min.
Rejection
1720 MHz to 1780 MHz
25.0 dB min.
Antenna to RX Response
Frequency
Specifications @ 25 C
Insertion Loss
1930 MHz to 1990 MHz
4.2 dB max.
Return Loss
10.0 dB min.
Rejection @ TX Band
1850 MHz to 1910 MHz
55.0 dB min.
TX to RX Response
Frequency
Specifications @ 25 C
Rejection @ RX Band
1930 MHz to 1990 MHz
39.0 dB min.
Rejection @ TX Band
1850 MHz to 1910 MHz
56.0 dB min.
Power Rating
3 W
Impedance
50
NOTE: Supplier shall test each filter to the critical electrical specifications listed above or better. Any subsequent audits may deviate due to measurement
repeatability among different test systems. Such deviations shall not exceed the following limits:
Specification
Typical Allowance
Insertion Loss
0.1 dB
Return Loss
1.0 dB
Stopbands
1.0 dB
MODEL KFF6637A
Contact Information:
CTS WIRELESS COMPONENTS, INC. / 171 Covington Drive / Bloomingdale, IL 60108
PHONE: (800) 757-6686 / www.ctscorp.com
Typical Response Curve
Mechanical Dimensions
Part Marking
W
IRELESS
C
OMPONENTS
PC Board Layout
Document Control #6287079Y01 Rev 1
Date of Origin 04/18/01
Date of Revision 04/18/01
THIS DATA SHEET IS NOT AN OFFER FOR SALE AND SHALL NOT OBLIGATE CTS TO SELL THE PRODUCTS DESCRIBED HEREIN OR ANY OTHER PRODUCTS. CTS MAY, IN ITS SOLE DISCRETION, MODIFY OR DISCONTINUE
THE SALE OF ITS PRODUCTS AT ANY TIME WITHOUT NOTICE. CTS MAKES NO WARRANTY, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE
PRODUCTS REFERENCED OR INFORMATION PROVIDED HEREIN.
CTS is a registered trademark of CTS Corporation.
Packaging
Reel Quantity: 500 pcs. max.
Reel Weight: 4.5 lbs. max.
Y = LAST DIGIT OF YEAR
WW = SEQUENTIAL WEEK NUMBER
All dimensions in mm
PDF 
ZIP