SAW Filters and Resonators: Smaller Packages and Lower Costs
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Remote keyless entry, tire pressure monitoring and other short range wireless, low data rate systems employing EPCOS SAW filters have been successfully integrated and widely accepted by the automotive industry for years. Now, an even larger market is emerging for home convenience, security and access, RFID tagging, set top boxes, home entertainment and meter reading. |
A world leader in SAW technology, EPCOS now
offers wide and narrow and SAW filters, as well
as resonators in a hermetically sealed 3 x 3mm2
ceramic package that cuts board space up to 64%
compared to previous packages - and at significantly
lower cost. This meets the demand to replace
wide band LC-combinations in receivers and
transmitters with low cost, but frequency stable,
SAW filters and resonators. Designed initially for
the automotive industry, the SAW structure is
protected by a passivation system and fulfills the
toughest qualification requirements, including the
automotive “Blue Book” AEC-Q200.
EPCOS provides SAW resonators in a one-port
version with narrow or broader initial tolerances
for transmitters with the very reliable frequency
modulation or simpler amplitude modulation in a
3 x 3 mm2 package. Two-port variants are also
available in these dimensions. So now, even
more applications can achieve the benefits of
miniaturization:
- More compact design for a higher level of integration
- Implementation of simple, reliable, highly cost effective transmitters and local oscillators in receivers
In addition to low production costs and small form
factors, EPCOS SAW filters and resonators meet
high durability and reliability requirements in
systems exposed to extreme environmental
conditions, such as automated meter readers.
The spectrum of these lead free RoHS-compliant
SMD devices ranges from 315MHz (B3731/R961),
345MHz (R965), 433MHz (R960), over the ISM
bands 868MHz and 915MHz (B3588/R2906), up
to GPS 1,575MHz (B3520).
APPLICATIONS
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- Automotive applications
- Wireless headphones
- Garage door openers
- Lighting systems
- Access controls
- Fire and security alarms
- GPS
- Control of heavy machinery
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| Part Number |
Center
Frequency
(MHz) |
Bandwidth
3dB
(MHz) |
Usable
Bandwidth
(MHz) |
Insertion
Attenuation
(dB) |
Features |
Type |
Package |
Size (mm) |
| B39162-B3520-U410 |
1575.42 |
38 |
2.4 |
1.3 |
50Ω, Unbal., Low IL |
B3520 |
DCC6C |
3 x 3 |
| B39321-B3711-U410 |
315 |
4.8 |
0.6 |
1.7 |
50Ω |
B3711 |
DCC6C |
3 x 3 |
| B39321-B3731-H110 |
315 |
0.63 |
0.36 |
2.4 |
High Temperature Stability |
B3731 |
DCC6E |
3 x 3 |
| B39431-B3710-U410 |
433.92 |
7.2 |
1.7 |
2.0 |
50Ω |
B3710 |
DCC6C |
3 x 3 |
| B39431-B3730-H110 |
433.92 |
0.72 |
0.36 |
2.4 |
High Temperature Stability |
B3730 |
DCC6E |
3 x 3 |
| B39431-R960-H110 |
433.92 |
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1.4 |
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R960 |
DCC6E |
3 x 3 |
| B39921-B3588-U410 |
915 |
38 |
26 |
2.9 |
50Ω |
B3588 |
DCC6C |
3 x 3 |
Many more types can be found in the SAW Device Selection Table under www.epcos.com/rke.
Featured Products
| Part Number |
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Description |
Data
Sheet |
App.
Notes |
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| B39162-B3520-U410-MR |
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Low Loss Filter for Automotive Telematics, 1575.42MHz
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| B39321-B3711-U410-MR |
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Low Loss Filter, 315MHz
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| B39321-B3731-H110-MR |
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SAW Filter, 315MHz
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| B39431-B3710-U410-MR |
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Low Loss Filter, 433.92MHz
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| B39431-B3730-H110-MR |
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Low Loss Filter, 433.92MHz
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| B39431-R960-H110-MR |
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SAW Resonator, 433.92MHz
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| B39921-B3588-U410MR |
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Low Loss Filter, 915MHz
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refers to New Product Introduction
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