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SAW Filters

Image Part Number Description / PDF Quantity Rfq
B39921B3726U410

B39921B3726U410

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 915MHZ 6SMD

11276
B39431B3935H110

B39431B3935H110

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 433.92MHZ 6SMD

0
B39272B4329P810

B39272B4329P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 2.655GHZ 5SMD

0
B39242B8857L210

B39242B8857L210

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 2.442GHZ 5SMD

3844
B39821B5046U510

B39821B5046U510

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 815.5MHZ 6SMD

0
B39182B4182U410

B39182B4182U410

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 1.883GHZ 6SMD

0
B39242B9413K610

B39242B9413K610

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 2.442GHZ 5SMD

8180
B39162B4310P810

B39162B4310P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 1.589GHZ 5SMD

484
B39321B3761Z810

B39321B3761Z810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 315MHZ 8SMD

1716
B39242B9634P810

B39242B9634P810

RF360 - A Qualcomm-TDK joint venture

BAW CSSP3 CU

1874
B39871B3749H110

B39871B3749H110

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 6SMD

0
B39921B2672P810

B39921B2672P810

RF360 - A Qualcomm-TDK joint venture

RF SAW COMMERCIAL

19000
B39871B3716U410

B39871B3716U410

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 869MHZ 6SMD

0
B39931B3758H110

B39931B3758H110

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 6SMD

0
B39321B3722U410

B39321B3722U410

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 315MHZ 6SMD

14318
B39871B3746H110

B39871B3746H110

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 868.6MHZ 6SMD

0
B39162B4313P810

B39162B4313P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 1.588GHZ 5SMD

0
B39871B4377P810

B39871B4377P810

RF360 - A Qualcomm-TDK joint venture

CSSP3 CU

616
B39162B4327P810

B39162B4327P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 5SMD

0
B39871B3903U510

B39871B3903U510

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 869MHZ 6SMD

0

SAW Filters

1. Overview

Surface Acoustic Wave (SAW) filters are compact, cost-effective RF filtering components that utilize mechanical waves propagating along the surface of piezoelectric materials. By converting electrical signals to acoustic waves and back, SAW filters achieve precise frequency selection with steep roll-off characteristics. They play a critical role in modern communication systems by enabling spectral efficiency, noise suppression, and signal integrity maintenance in wireless devices, automotive electronics, and industrial equipment.

2. Main Types and Functional Classification

TypeFunctional CharacteristicsApplication Examples
IDT-Structured SAWStandard interdigital transducer design with <3 GHz operating rangeMobile phones, Wi-Fi routers
Dual-Mode SAWHigher Q-factor through resonator coupling5G NR frequency bands (n77/n78)
Temperature-Compensated SAW (TC-SAW) 0.5 ppm/ C stability using layered substratesAutomotive radar (76-81 GHz)
Miniature SAW (M-SAW)0.5-2.0 mm package sizes for IoT devicesBluetooth LE modules, wearables

3. Structure and Composition

Typical SAW filter construction includes:

  • Piezoelectric substrate (LiTaO3, LiNbO3, or quartz)
  • Aluminum interdigital transducer (IDT) electrodes (50-200 nm thickness)
  • Acoustic wave propagation path (10-100 wavelength)
  • Hermetic ceramic packaging with EMI shielding

Advanced variants incorporate temperature compensation layers (SiO2/Ta2O5) and reflector bars to enhance frequency stability and stopband attenuation.

4. Key Technical Specifications

ParameterDescriptionImportance
Center Frequency (f0)100 MHz - 6 GHz rangeDetermines application compatibility
Bandwidth (BW)0.5-15% of f0Impacts data rate capabilities
Insertion Loss1.5-15 dBAffects signal strength
Attenuation Slope10-100 dB/MHzMeasures selectivity performance
Power Handling100 mW - 5 WLimits transmitter integration
Temperature Stability 50 ppm/ C (standard)System reliability factor

5. Application Fields

  • Telecommunications: 5G base stations, CATV systems, GPS receivers
  • Automotive: Tire pressure monitoring systems (TPMS), V2X communication
  • Consumer Electronics: Smartphones, IoT modules, drones
  • Industrial: Medical imaging equipment, test & measurement instruments

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Features
Murata ManufacturingSAWF9BAF420M4A12.4 GHz WLAN filter, 0.9 dB loss
TDK CorporationKC5030S108MB1Sub-6 GHz 5G filter, 1.2 dB insertion loss
Skyworks SolutionsSAW-8851417Multi-band cellular filter, 1.8-2.7 GHz
Infineon TechnologiesB11243-F108Automotive-grade TC-SAW for 80 GHz radar

7. Selection Recommendations

Key selection criteria:

  1. Frequency match with < 0.1% tolerance
  2. Temperature stability grade (standard vs TC-SAW)
  3. Package size vs power handling requirements
  4. Attenuation slope for adjacent channel rejection
  5. RoHS compliance for environmental regulations

Example: For LTE Band 7 (2.6 GHz) applications, select TDK's KC5030S108MB1 with 110 MHz bandwidth and 1.2 dB loss in 0.5x0.5 mm package.

8. Industry Trends

  • Transition to 5G driving demand for 3-6 GHz SAW filters
  • Development of hybrid SAW-BAW modules for wideband applications
  • Miniaturization reaching 0.4x0.2 mm WLB packages
  • Advanced TC-SAW achieving < 10 ppm/ C stability
  • Integration with antenna switch modules (ASM) in SiP solutions
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