Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Question about layout of SAW duplexer

Status
Not open for further replies.
D

DDavid

Full Member level 5
Joined
Apr 6, 2006
Messages
305
Helped
49
Reputation
98
Reaction score
27
Trophy points
1,308
Activity points
2,986
Hi guys,

I have a question about layout of the saw duplexer. I am using epcos saw duplexer for cellular (PCS for example) and I don't know how to make a layout for it.

Do anybody have any experience in this I will appreciate...

Regards
David
 

Hi,

I attach my guess about how to put SAW Duplexer on Pcb.
Please if some one Know how to do it...
I NEED A CLUE!!!

David
 

The layout seems to be fine but add some vias under the case to connect ground of the SAW filter.Add at least 6-8 small vias under the package..( if you're using double or multiple layer PCB)
In addition to, increase just a little bit the copper pour pattern around input and output pads to prevent the parallel capacitors which aren't wanted..
 

Hi,

Tnx for repplying,
I am using double layer only. Under component I remove the gnd to "separate"
ground.
Stomatch of the device without gnd!!!

David
 

DDavid said:
Hi,

Tnx for repplying,
I am using double layer only. Under component I remove the gnd to "separate"
ground.
Stomatch of the device without gnd!!!

David
Click to expand...

If your frequency is NOT too high, it's not neccesary to separate the ground to obtain a independent ground pattern. But it's an idea to seperate the "grounds". But if you ground connections are not very established, you'll some small indcutances on common mode way and obviously some RF signals may disturb in common mode..
 

Hi again,:D

Freq that I am work are between: 800-2300MH.

Therefore I deceided to seperate like attach below.
I think that layout will be more correct.

David
 

Hi DDavid,

the post is quite old.... did you solve your problem or do you still need some advice?

Br,
_Gabi_
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top