Microstrip Bandpass filter - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues - primarily having to spend time purging garbage posts from the board. At some point I might start the RF Cafe Forums again if the phpBB software gets better at filtering spam.

Below are the old forum threads, including responses to the original posts.

-- Amateur Radio
-- Anecdotes, Gripes & Humor
-- Antennas
-- CAE, CAD, & Software
-- Circuits & Components
-- Employment & Interviews

-- Miscellany
-- Swap Shop
-- Systems
-- Test & Measurement
-- Webmaster

Antonio
Post subject: Microstrip Bandpass filter Posted: Mon Jul 23, 2007 3:33 am

Captain

Joined: Sat Jun 16, 2007 12:26 am
Posts: 12
Hi all,

I am trying to design a Microstrip bandpass filter using edge Coupled Tapped line structure. After designing and simulating it in ADS, i found variations in the actual performance and simulation result. I found that there is a shift in the band and poor return loss.

Can anyone please suggest me
1.why i am getting shift in the band??
2. Why there is mismatch in the simulation and actual response even though i am feeding the substrate information in the simulation?
3. How to control this shift in the band?
4. How to improve the return loss perfomance?

Please help me to solve this problem.

Posted 11/12/2012