0
\$\begingroup\$

This component is placed in the signal path next to a multi-band GSM antenna. It seems to have 3 terminals - 1x GND and 2x in signal path. I suspect it is some sort of bandpass filter, but can't locate the exact details anywhere.

[Edit] also added side view close-ups. Definitely looks like ceramic bandpass filter structure. But which one ?

Dimensions are 7mmx 11mmx 3mm

[Edit added a circuit sketch] enter image description here enter image description here enter image description here Any help?

enter image description here

\$\endgroup\$
5
  • \$\begingroup\$ Any designators around, like X1, Y5, U4 etc? And can you put a bigger picture to show the surrounding components and overall PCB? \$\endgroup\$
    – Rohat Kılıç
    Feb 15 at 8:32
  • \$\begingroup\$ No designators anywhere. What is shown IS the surrounding pcb. A coupling cap and an etched meander inductance is between this and the antenna bit. Impedance is mentioned as 50ohm in the associated document. \$\endgroup\$
    – Kripacharys
    Feb 15 at 9:10
  • \$\begingroup\$ Probably a SAW filter. BEF might even mean "band elimination filter". \$\endgroup\$
    – Lundin
    Feb 15 at 9:23
  • \$\begingroup\$ I've heard of Band Stop and Notch, but never Band Elimination filter !! Anyway - i took a real close-up of the sides as well, and looks like a ceramic band filter structure. Pics have been added. \$\endgroup\$
    – Kripacharys
    Feb 15 at 10:31
  • \$\begingroup\$ I suspect the numbers are the frequency limitz, or somehow related to the operational frequency. But still no joy in finding the exact specs. \$\endgroup\$
    – Kripacharys
    Feb 21 at 16:38

0

Reset to default

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Browse other questions tagged or ask your own question.