Frank wrote :- ------------------------ I am trying to learn about microwave bandpass filters. The last few days I've been looking at interdigital filters, quarter line transmission filters, SAW, PCB traces. Do you have any good references on printed circuit board bandpass filter? I am studying a Rick Campbell articles from the ARRL (A single board no tune 902MHGZ Transverter) but it doesn't explain how to get the dimensions of the C traces. (BTW, what's the correct techincal term for that?) -------------------------
They are usually referred to as coupled lines. The dimensions are usually generated by CAD programs, some of which are available free of charge (such as Sonnet Lite). This thread is getting a bit off-topic for the Soft_radio group; if anybody wants get involved with microwaves then a good source of information can be found on the microwaves reflector :- http://www.wa1mba.org/reflect.htm and follow the link or mail me off-list. Microwaves is a fascinating part of amateur radio; it's developing all the time and the introduction of SDR into the microwave world will help to encourage experimentation with new circuit techniques, modulation methods etc. etc. regards Grant Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/soft_radio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
