SAW Narrowband Front End Filters
RFM provides a large selection of low-loss narrowband front end
Narrowband Front End Filters
Select by Part
filters for all major frequencies used in low-power unlicensed
communications equipment ranging from 300-1000 MHz. Coupled-
resonator filter technology is used in the RF series of components.
These devices are used as narrowband front-end filters to reject strong
out-of-band signals.
Typical bandwidths are 600-900 kHz with typical ultimate out-of-
band rejection of 50 dB. Special rejection is provided at key points such
as -10.7 MHz for local oscillator rejection and -21.4 MHz for the image
spurious response in typical superhet receivers.
Optimum implementation of this filter technology is accomplished
when the filter is matched on both input and output ports. This
matching is typically a simple inductor-capacitor network. In addition to
matching, careful attention to circuit board layout is also important to
achieve optimum filter performance.
Applications
Product No.
RF1171
RF1171D
RF1172
RF1172C
RF1172D
RF1181
RF1181D
RF1181E
RF1210
RF1210D
RF1211
RF1211C
RF1211D
RF1238
RF1284
RF1295C
RF1319D
RF1319E
RF1336C
RF1336D
RF1336E
New Product
RF3171
RF3171D
RF3404
RF3404D
RF3181
RF3181D
RF3181E
RF3210D
RF3417
RF3319D
RF3319E
RF3336C
RF3336D
RF3336E
Freq.
(MHz)
418
418
433.92
433.92
433.92
916.5
916.5
916.5
303.825
303.825
315
315
315
318
319.5
451.35
868.95
868.95
868.35
868.35
868.35
Bandwidth
(kHz)
600
620
600
700
600
750
600
600
700
650
700
900
600
700
600
1000
650
900
600
650
650
Case
mmxmm
TO39-3
3.8x3.8
TO39-3
5.0x5.0
3.8x3.8
TO39-3
3.8x3.8
3.0x3.0
TO39-3
3.8x3.8
TO39-3
5.0x5.0
3.8x3.8
TO39-3
TO39-3
5.0x5.0
3.8x3.8
3.0x3.0
5.0x5.0
3.8x3.8
3.0x3.0
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
Automotive keyless entry
Tire pressure monitoring
GPS locating systems
Wireless point-of-sale terminals
Data link equipment
Peripherals
High Performance Computing (HPC)
Remote bar code data entry
Bar code readers
Identification tags
Home automation
Door and gate openers
Personal and home security
Automated meter reading
Consumer sports
RF1353C
RF1353D
RF1355
RF1391C
RF1396C
RF1400D
RF1401D
RF1402D
RF1404C
RF1404E
RF1407D
RF1408D
RF1411D
RF1414D
RF1417E
RF1419D
RF1432C
RF3171
RF3171D
RF3181
RF3181D
RF3181E
RF3210D
RF3319D
RF3336
RF3336C
RF3336D
RF3336E
RF3355C
RF3404
RF3404D
RF3404E
RF3414E
RF3417
RF3417D
RF3417E
RF3501E
RF3601E
RF3404E
RF3417E
345
345
390
433.42
433.42
433.92
433.92
315
433.92
433.92
868.6
447.7
869.2625
372.5
315
403.5
319.5
418
418
916.5
916.5
916.5
303.825
868.95
868.35
868.35
868.35
868.35
390
433.92
433.92
433.92
372.5
315
315
315
866.1
960
430
430
440
600
700
1150
1000
1000
700
650
1800
840
1250
450
600
7500
600
600
620
750
600
600
650
650
600
600
650
650
440
600
600
650
450
700
600
600
31000
40000
5.0x5.0
3.8x3.8
TO39-3
5.0x5.0
5.0x5.0
3.8x3.8
3.8x3.8
3.8x3.8
5.0x5.0
3.0x3.0
3.8x3.8
3.8x3.8
3.8x3.8
3.8x3.8
3.0x3.0
3.8x3.8
5.0x5.0
TO39-3
3.8x3.8
TO39-3
3.8x3.8
3.0x3.0
3.8x3.8
3.8x3.8
TO39-3
5.0x5.0
3.8x3.8
3.0x3.0
5.0x5.0
TO39-3
3.8x3.8
3.0x3.0
3.0x3.0
TO39-3
3.8x3.8
3.0x3.0
3.0x3.0
3.0x3.0
Denotes New Product
6
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