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SAW Bandpass Filter
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FEATURES    [Click here to download full pdf]

  • High Reliability
  • Maintenance Free
  • Inherent Linear Phase
  • High Reproducibility
  • No Tuning Necessary
  • Small and Rugged
  • Low Cost in Volume
  • Superior Shape Factors
  • Good Temperature Stability

TYPICAL PARAMETERS

  • SAW Filter Capabilities
  • Frequency Range 10 MHz – 700 MHz
  • Bandwidth 0.1%-30%
  • Large Range of Standard Designs
  • Comprehensive Custom Design Capability Typical Performance
  • Rejection Better Than 50dB
  • Shape Factors Down to 1.5:1
  • Temperature Range -40 to +85C

CUSTOM DESIGN (click on sales-edi@comdev.co.uk to submit a Custom Design request)

Introduction
The Custom Design of SAW Filters, like that of Custom Integrated Circuits, is complex, requiring design, pattern generation, floor planning, mask-making, photolithography and sophisticated processing.

Benefits
Offering an ideal filter response for your application, SAW comes into its own when relatively large volumes are required at low cost. However, even for smaller quantities SAW can provide economic solutions to the most demanding IF filter specifications.

Design
Our specialist engineers can evaluate your specification for realisation as a SAW filter and quote you performance figures based on our comprehensive in house Computer Aided Design capability.

Prototype
If this design meets your performance requirements we can, using our advanced processing facility, turn round a prototype batch of filters with full electrical performance data for you to evaluate in your application.

Production
Once the design has been agreed you can then be supplied with production quantities of highly reproducible filters from Europe’s leading SAW Manufacturer.


Summary of Typical Performance Figures

 

TYPE Fo 1dB 3dB  30dB  40dB SLL REJ IL MAT’L PACK NOTES
BW BW BW BW
(MHz) (MHz) (MHz) (MHz) (MHz) (dB) (dB) (dB)
WD023 30.00 0.80 1.00 1.20 1.30 35 70 30 ST-Q NS  
WC065 23.33 2.20 3.30 8.40 12.60 40 55 32 YX-L B  
WC064 23.33 4.50 6.50 16.80 25.20 40 55 32 YX-L B  
WC020 45.00 5.00 7.00 - - 32 60 8 YZ-L NS 1
WC055 54.05 0.11 0.21 - 0.60 40 60 19 ST-Q NS  
WC023 59.50 4.20 5.10 8.90 9.80 50 60 22 YZ-L A  
WC062 60.00 0.25 0.39 0.88 1.02 45 65 23 ST-Q B  
WC036 60.00 2.60 4.50 - - 17 60 20 YZ-L A 2
WC058 60.00 4.70 5.30 7.80 8.20 42 55 23 YZ-L A  
WC022 60.00 8.60 10.10 18.00 19.70 45 50 28 YZ-L A  
WC035 60.10 0.52 0.68 - 1.42 48 64 30 ST-Q B  
WC056 62.20 0.05 0.09 - - 25 70 20 ST-Q NS 3,4
WC068 63.00 5.70 6.60 9.70 10.20 50 60 20 YZ-L A  
WC063 70.00 - 21.80 31.70 33.20 50 60 31 YX-L A  
WC045 70.00 0.26 0.40 0.88 1.06 45 65 23 ST-Q B  
WC044 70.00 0.27 0.33 0.57 0.84 45 65 22 ST-Q D  
WC046 70.00 0.52 0.66 1.23 1.45 45 65 17 ST-Q B 3
WC038 70.00 0.60 0.70 1.40 1.60 45 65 17 ST-Q B 3
WC039 70.00 0.90 1.10 2.00 2.40 45 65 17 ST-Q B 3
WC047 70.00 1.00 1.30 2.30 3.00 45 65 17 ST-Q B 3
WC040 70.00 1.30 1.70 2.90 3.60 40 60 20 ST-Q B 3
WC048 70.00 2.00 2.50 4.40 4.70 45 70 23 ST-Q B 3
WC041 70.00 2.00 2.50 4.50 5.70 45 65 23 ST-Q B 3
WC034 70.00 4.40 5.50 8.90 10.50 42 55 20 YZ-L A  
WC067 70.00 5.70 6.60 9.70 10.20 50 60 20 YZ-L A  
WC043 70.00 8.70 10.70 18.00 19.30 45 55 25 YZ-L A  
WC070 70.00 17.30 20.80 30.30 31.70 50 60 33 YZ-L NS  
WC049 70.00 17.30 20.80 30.30 31.70 50 60 33 YZ-L A  
WC069 77.00 5.70 6.60 9.70 10.20 50 60 20 YZ-L A  
WC029 122.40 9.60 11.80 21.10 23.00 50 55 18 YZ-L A  
WC028 122.40 18.30 23.60 40.90 44.40 50 50 25 YZ-L A  
WC027 122.40 35.20 42.70 80.30 84.00 40 40 35 YZ-L A  
WC030 131.30 0.75 1.26 - 3.60 45 55 22 ST-Q A  
WC059 160.00 1.00 1.30 2.00 2.10 45 65 23 ST-Q B  
WC050 160.00 1.20 1.52 2.60 - 36 65 22 ST-Q B 3
WC060 160.00 2.20 2.60 4.00 4.20 45 65 22 ST-Q B 3
WC061 160.00 4.20 5.20 7.90 8.30 45 65 26 ST-Q B 3
WC051 211.00 2.00 2.50 - 4.20 40 50 26 ST-Q A  
WC057 250.00 0.21 0.38 1.95 4.18 26 60 23 ST-Q B 3,4
WC052 250.40 0.24 0.38 0.99 1.22 40 60 23 ST-Q B 3
WC032 300.00 2.72 3.44 - 6.90 45 60 19 ST-Q A  
WC053 328.25 0.49 0.87 - - 23 40 18 ST-Q A 4
WJ012 401.55 0.43 0.78 - - 25 50 24 ST-Q A 4
WC054 700.00 - 200.00 - - 30 27 40 YZ-L A  
KEY TO SYMBOLS:
Fo   Centre Frequency
BW   Bandwidth
SLL  Frequency Sidelobe Level
REJ  Ultimate Rejection
IL   Insertion Loss
ST-Q ST Quartz
YZ-L YZ Lithium Niobate
YX-L YX Lithium Niobate
NS   Non Standard
A – D Outline Drawing
Note: Units in type B packages are available in type C to special order.
Add –C to type number, eg. WC010-C.  Other outlines also available.
NOTES:
1  Special tuning required
2  Matched Filter for pulse processing
3  Insertion loss with sample series tuning
4  Combination of sinc(f) responses

 

COM DEV International, Lochend Industrial Estate, Newbridge, Edinburgh, EH28 8PL, Scotland
Tel: 0131 333 2000 | Fax: 0131 333 3607 | COM DEV Europe Limited Registered England and Wales Company Number: 1863723