KR Electronics, Inc.
KR Electronics, Inc.
General Description
KR Electronics part number 2977 is a 485 MHz bandpass filter.
The filter has a 3 dB bandwidth of 40 MHz. Other center fre-
quencies and bandwidths available. Please consult the factory.
www.krfilters.com
Features
485 MHz Center Frequency
40 MHz, 3 dB Bandwidth
50
Source and Load
Surface Mount
Typical Performance
Overall Response
(10 dB/div)
KR Electronics, Inc.
91 Avenel Street
Avenel, NJ 07001
© 2009, KR Electronics, Inc.
2977, 485 MHz Bandpass, Rev 0, March 20, 2010
Web
Email
Phone
Fax
www.krfilters.com
sales@krfilters.com
(732) 636-1900
(732) 636-1982
Page 1
KR Electronics, Inc.
KR Electronics
Typical Performance
www.krfilters.com
Passband Amplitude & Group Delay
(1 dB/div & 10 nsec/div)
KR Electronics, Inc.
91 Avenel Street
Avenel, NJ 07001
© 2009, KR Electronics, Inc.
2977, 485 MHz Bandpass, Rev 0, March 20, 2010
Web
Email
Phone
Fax
www.krfilters.com
sales@krfilters.com
(732) 636-1900
(732) 636-1982
Page 2
KR Electronics, Inc.
KR Electronics 2977
Specifications
Parameter
Filter type
Center Frequency
Insertion Loss
3 dB Bandwidth
20 dB Bandwidth
40 dB Bandwidth
Source and Load
Specification
Bandpass
485 MHz
4.5 dB max
40 MHz ± 4 MHz
69 MHz typical
117 MHz typical
50
www.krfilters.com
2.3 dB typical
Physical Dimensions
Notes:
1. Surface mount package
2. Dimensions in inches
3. Max reflow temperature 209° C for 10 sec
4. If boards are cleaned after installation units must be completely dried
KR Electronics, Inc.
91 Avenel Street
Avenel, NJ 07001
© 2009, KR Electronics, Inc.
2977, 485 MHz Bandpass, Rev 0, March 20, 2010
Web
Email
Phone
Fax
www.krfilters.com
sales@krfilters.com
(732) 636-1900
(732) 636-1982
Page 3