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SAW Filters

Image Part Number Description / PDF Quantity Rfq
B39162B4308P810

B39162B4308P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 1.575GHZ 5SMD

0
B39152B4325P810

B39152B4325P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 5SMD

0
B39431B3770Z810

B39431B3770Z810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 426.075MHZ 8SMD

2653
B39192B4315P810

B39192B4315P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 1.88GHZ 5SMD

0
B39451B3907U410

B39451B3907U410

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 447.7MHZ 6SMD

0
B39431B3774Z810

B39431B3774Z810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 433.92MHZ 8SMD

0
B39871B3441U410

B39871B3441U410

RF360 - A Qualcomm-TDK joint venture

RF DCC6C

8677
B39871B3717U410

B39871B3717U410

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 866.5MHZ 6SMD

19451
B39162B8813P810

B39162B8813P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 5SMD

0
B39851B4404P810

B39851B4404P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 9SMD

0
B39941B4304F210

B39941B4304F210

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 942.5MHZ 5SMD

0
B39451B3767Z810

B39451B3767Z810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 447.725MHZ 8SMD

3314
B39871B3941H110

B39871B3941H110

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 868.95MHZ 6SMD

0
B39252B4332P810

B39252B4332P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 5SMD

0
B39931B3919U410

B39931B3919U410

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 925MHZ 6SMD

0
B39232B3471H910

B39232B3471H910

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 10SMD

0
B39751B4318P810

B39751B4318P810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 751MHZ 5SMD

0
B39711B5107U410

B39711B5107U410

RF360 - A Qualcomm-TDK joint venture

RF DIPLEXER 393.5/1848MHZ 6SMD

2302
B39431B3775Z810

B39431B3775Z810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 433.92MHZ 8SMD

0
B39471B5052Z810

B39471B5052Z810

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 465MHZ 8SMD

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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