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SAW Filters

Image Part Number Description / PDF Quantity Rfq
SF2281D

SF2281D

RFMi

FILTER SAW, 313.15/314 MHZ, 8SMD

0
F5QA942M5M2AW-J

F5QA942M5M2AW-J

TAIYO YUDEN

FILTER SAW 942.5MHZ 5SMD

6759
SF2124E

SF2124E

RFMi

FILTER, SAW, 2441.8 MHZ, 6SMD

4923
SF16-0868M4UU01

SF16-0868M4UU01

KYOCERA Corporation

FILTER SAW 868.42MHZ 4SMD

4373
SF2434E-1

SF2434E-1

RFMi

FILTER, SAW, 1223 MHZ, 6SMD

0
SF1220G

SF1220G

RFMi

FILTER, SAW, 2326 MHZ, 5SMD

0
RSF-942.500-35000-3030-TR-NS3

RSF-942.500-35000-3030-TR-NS3

Raltron

FILTER SAW 942.5MHZ 6SMD

1794
B39311B3729H110

B39311B3729H110

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 313.85MHZ 6SMD

0
SF1186H-2

SF1186H-2

RFMi

FILTER, SAW, 1575.42 MHZ, 4SMD

0
SF2419E

SF2419E

RFMi

FILTER, SAW, 495 MHZ, 6SMD

0
EFC-H836MTCD1

EFC-H836MTCD1

Panasonic

FILTER SAW 836.5MHZ 5SMD

507
AFS916.5S3

AFS916.5S3

Abracon

FILTER SAW 916.5MHZ 6SMD

0
SF14-1575F5UUA1

SF14-1575F5UUA1

KYOCERA Corporation

FILTER SAW 1.575GHZ 5SMD

3966
SF2425E

SF2425E

RFMi

FILTER, SAW, 868.6 MHZ, 8SMD

0
F6QA2G595M2QK-J

F6QA2G595M2QK-J

TAIYO YUDEN

FILTER SAW 2.595GHZ 5SMD

0
B39431B3736H110

B39431B3736H110

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 433.92MHZ 6SMD

1910
SF2423D

SF2423D

RFMi

FILTER, SAW, 480 MHZ, 8SMD

0
B39431B3727H110

B39431B3727H110

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 433.92MHZ 6SMD

0
B39401B3742H110

B39401B3742H110

RF360 - A Qualcomm-TDK joint venture

FILTER SAW 400MHZ 6SMD

1892
AFS390E

AFS390E

Abracon

FILTER SAW 390MHZ 8SMD

301

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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