how to used CST sofware to design filter

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faizzudin

Joined: 14 Jul 2009
Posts: 4
Location: malaysia

14 Jul 2009 5:52 metamaterial filter

anyone can help me to design bandpass filter using cst or give website to me to refer

chandregowda

Joined: 07 Jul 2008
Posts: 205
Helped: 9
Location: Bengaluru/Bangalore, India

15 Jul 2009 8:26 design filter in cst

hi,

you can't make any design calculations for filters using CST.

you can model your design in CST and simulate for the response, optimize the results

refer

http://www.cst.com/Content/Applications/Category/Filters

also examples in CST software, help contents it has many on filters

faizzudin

Joined: 14 Jul 2009
Posts: 4
Location: malaysia

15 Jul 2009 12:18 design filter using cst 2009

o realy..how about to design calculation u can suggest to me ...or example
i have final project using metametarial to design bandpass filter in 1.8G operats in 4 band in one devices...
any idea to help me ..or refferences
thank for ur above info

chandregowda

Joined: 07 Jul 2008
Posts: 205
Helped: 9
Location: Bengaluru/Bangalore, India

15 Jul 2009 12:42 site:www.edaboard.com cst

hi,

i am beginner in RF filters... referring to Matthei and Pozar books

but i didn't understand ur sentence 1.8G operates in 4 band....

what are specs

faizzudin

Joined: 14 Jul 2009
Posts: 4
Location: malaysia

15 Jul 2009 15:37 bandpass filter design cst 2009

actually i don,t know how to tell exactly
but i try to design the bandpass filter using CST
the sentences is about the
design of fourth band BPF using metameterial
this design operates in 1.8 GHz in one device
can u help me to design

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manara84

Joined: 16 Aug 2009
Posts: 1
Location: malaysia

16 Aug 2009 6:10 filter design using cst 2009

hi
so guys if we cant use cst to design BPF so what other software can we use?

vedagarbhamsandeep

Joined: 15 Apr 2008
Posts: 30
Helped: 2
Location: Korea

21 Aug 2009 12:45 cst filter

u may use Ansoft designer, Microwave office, ADS
Sonnet, Eagleware also I suppose

enrico

Joined: 06 Jun 2005
Posts: 12
Helped: 1

23 Aug 2009 17:21 Re: how to used CST sofware to design filter

As long as you use capacitive coupling with inductive load, then you have metamaterial filter.

You can simulate it with distributed elements on CST. As reference please go to the Ansoft website and download the application note called "Left-HandedMetamaterial DesignGuide", there you will find some guidelines how to design your metamaterial filter.

Conventional transmission line systems uses inductive coupling and capacitive load, but metamaterials with both negative permeability and permittivity can be obtained using inverse as it, capacitive coupling and inductive load, in other words a gap between a transmission line microstrip will be your capacitor and a via hole shorting the top side to bottom will be the inductor. By doing it, you will obtain both Er and u negative for limited bandwidth.

Regards,