KR Electronics, Inc.
KR Electronics, Inc.
General Description
KR Electronics part number 3131-28.7 is a 28.7 MHz bandpass
filter. The filter has a minimum 1 dB bandwidth of 5.1 MHz.
Other center frequencies and bandwidths available. Please con-
sult the factory.
www.krfilters.com
Features
28.7 MHz Center Frequency
5.1 MHz min 1 dB Bandwidth
Sharp Transition to Stopband
High Stopband Rejection >80 dB
50
Source and Load
SMA Connectors
Typical Performance
Overall Response
(10 dB/div)
KR Electronics, Inc.
91 Avenel Street
Avenel, NJ 07001
© 2014, KR Electronics, Inc.
3131-28.7, 28.7 MHz Bandpass, Rev 0, February 14, 2014
Web
Email
Phone
Fax
www.krfilters.com
sales@krfilters.com
(732) 636-1900
(732) 636-1982
Page 1
KR Electronics, Inc.
KR Electronics, Inc.
Typical Performance
www.krfilters.com
Passband Amplitude & Group Delay
(1 dB/div & 50 nsec/div)
KR Electronics, Inc.
91 Avenel Street
Avenel, NJ 07001
© 2014, KR Electronics, Inc.
3131-28.7, 28.7 MHz Bandpass, Rev 0, February 14, 2014
Web
Email
Phone
Fax
www.krfilters.com
sales@krfilters.com
(732) 636-1900
(732) 636-1982
Page 2
KR Electronics, Inc.
KR Electronics 3131-28.7
Specifications
Parameter
Filter type
Center Frequency
Insertion Loss
1 dB Bandwidth
3 dB Bandwidth
40 dB Bandwidth
Rejection at 21.4 MHz
Rejection at 36.3 MHz
Source and Load
Specification
Bandpass
28.7 MHz
2.5 dB max
5.1 MHz min
7.6 MHz typical
10.7 MHz typical
80 dB min
80 dB min
50
www.krfilters.com
Notes
1.25 dB typical
26.15 MHz to 31.25 MHz
Physical Dimensions
Notes:
1. SMA(F) to SMA(M)
2. Mounting Inserts 2x 2-56
3. Dimensions in inches
KR Electronics, Inc.
91 Avenel Street
Avenel, NJ 07001
© 2014, KR Electronics, Inc.
3131-28.7, 28.7 MHz Bandpass, Rev 0, February 14, 2014
Web
Email
Phone
Fax
www.krfilters.com
sales@krfilters.com
(732) 636-1900
(732) 636-1982
Page 3