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Cavity Filter Study - RF Cafe Forums
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Camel Post subject: Cavity Filter Study Unread postPosted: Fri
Dec 26, 2003 10:27 pm
I am current looking for the general design
guide line for the reentrant cavity filter. I am new and would like
to know what is the steps that I need to follow for designing such a
filter. Any comments/suggestion/feedback is welcomed. Thanks in advance.
:roll:
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JGP Post subject: Cavity Filter
Study Unread postPosted: Wed Dec 31, 2003 2:26 pm
Designing,
testing and even manufacturing of RF, Microwave and Sub-Millimeter filters
circuit takes experience and hard work. There are many approaches and
tradeoffs when it comes to passive filters. My advice to you is to invest
lot of time studying (compare many books and authors’ filters design,
approach and tradeoffs), getting familiar with different type of equipment
and tools (Network and Spectrum Analyzers, Signal Generators, Power
Meters, Signal Attenuators, Critical Cable tool, Simulation Software…etc
– you can buy used (software must be new and with option for optimization)
ones at surplus but, make sure they work well or rent some). By employing
this method you will be unable to make rapid progress in building filters.
Remember, no filter is good for use until tested and it worked according
to desired specifications (overkill specs results to begin is a real
good approach). Please, be aware that in these modern days, mixed signals
(analog/digital) are often required and/or digital signals alone for
transmission and receiving in wireless communications applications.
Therefore, one must work with reliable and accurate design tool (software)
in order to get proper results. We have used good hand calculator in
past and proved that software is the best way to go for any RF Engineer.
I thought this might help you at beginning. Good luck!
Sincerely,
John Pereira
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Camel Post subject: Cavity
Simualtion using HFSS Unread postPosted: Sat Jan 03, 2004 2:19 am
Hi John,
Thanks for your advise. I am currently having
some background on ADS and HFSS, and would like to use this tool for
the cavity design. My goal is to design a BPF, with 3.6 GHz center freq.
I would like to know where and how should I start off? From LPF and
convert to BPF or ??? Pls advise :?:
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JGP
Post subject: Cavity Filter Study Unread postPosted: Sun Jan
04, 2004 6:18 pm
Camel,
Please, answer the following:
Are you doing R & D on this specific filter design? What is the
filter application for? You could design this filter by using Waveguide
(should it be for high power level…) or Distributed Element filter topologies.
Why have you selected cavity filter? I will be keen to help you design
and build this filter. However, in order to do that, I will need to
have complete electrical specifications. Mechanical B.O.M. (bill of
material) I will advise. Due to it will take us lots of communication;
I’d prefer to be contacted via email. Following are my emails: jgp882003@yahoo.com
or jgp95@hotmail.com
Sincerely, John Pereira
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JGP Post subject: Cavity Filter Study Unread postPosted:
Mon Jan 05, 2004 7:32 pm
Camel,
Following are some information
about Re-entrant Cavity! I personally haven’t design it, however, I
thought these might help you.
http://accelconf.web.cern.ch/AccelConf/
... PDO022.pdf
http://accelconf.web.cern.ch/AccelConf/ ... PDO022.pdf
Should you need further help, please let me know.
Sincerely,
John Pereira
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JGP Post subject: Cavity
Filter Study Unread postPosted: Mon Jan 05, 2004 7:53 pm
Camel,
Due to you are doing design and build the Re-entrant cavity
filter, this information below may be even better.
http://www.ece.eps.hw.ac.uk/~ceeem/Misc
... npap11.pdf
Sincerely, John Pereira
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Camel Post subject: Cavity Filter Study [3] Unread postPosted:
Mon Jan 05, 2004 8:29 pm
Hi John,
Thanks for posting
me all this information and I found that the last one is really useful.
I will try to read through it and appreciated if you could help when
I have encounter any questions on this articles.
Have a nice
day!! :D
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JGP Post subject: Cavity Filter
Study Unread postPosted: Tue Jan 06, 2004 1:47 pm
Camel,
You are welcome. I will be keen to help you.
John Pereira
Posted 11/12/2012
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