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g86
Joined: 21 Jan 2003
Posts: 208
Helped: 4
Location: On top of antenna :))
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 10 Mar 2003 12:57 Filter design |
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Which type of notch filter (15 MHz BW) is best suitable for GSM band. Which simulator shoul I prefer. I am thinking to start with Parfil and check with Sonnet. Is it ok?
I need to reduce the insertion loss. I want to choose stripline with air subtrate and thick lines and shorted or taped interdigital config. Is it OK? Do you have any practical experince of problem associated with it?
  
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jamez
Joined: 15 Jan 2002
Posts: 57
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| 10 Mar 2003 14:00 |
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 Hi ,
I suggest u deal it with a shorted interdigital config in rod coxial line way.
by the way, How can I get a free Parfil , can U help me?
james
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eirp
Joined: 11 Dec 2001
Posts: 807
Helped: 9
Location: Phase center
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| 10 Mar 2003 14:03 |
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Hi, g86!
Have you tried Filter wizard in I/E/3/D? It can be run from ZPM ---> I/E/3/D library --> filter wizard. After synthesis it can be simulated.
Regards,
Eirp
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g86
Joined: 21 Jan 2003
Posts: 208
Helped: 4
Location: On top of antenna :))
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| 10 Mar 2003 14:39 |
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Erip,
Are you talking about FilterSyn?
I have tried them. My remark is Zeland made a real showcase of filters. The synthesis engine has many bugs and many thing has not been implemanted yet. For notch filters they are highly unefficient and many times does not even converge:(. Even any higher order filters dies up with some arbitrary values. Also no option for tan(delta) and strip thickness. And you know they are all open wall simulation. Horrible results.... mate.
| eirp wrote: |
Hi, g86!
Have you tried Filter wizard in I/E/3/D? It can be run from ZPM ---> I/E/3/D library --> filter wizard. After synthesis it can be simulated.
Regards,
Eirp |
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g86
Joined: 21 Jan 2003
Posts: 208
Helped: 4
Location: On top of antenna :))
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| 10 Mar 2003 14:52 |
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Thankx for your suggestion. Actually I was also suggested by U_f_O to use circular rods. But I found it is very difficult to analyze them further with EM simulators.  Any further suggestion...
| jamez wrote: |
Hi ,
I suggest u deal it with a shorted interdigital config in rod coxial line way.
by the way, How can I get a free Parfil , can U help me?
james |
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jamez
Joined: 15 Jan 2002
Posts: 57
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| 11 Mar 2003 4:51 |
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Hi,
I really simulate a filter by hfss,and it really run good.
But for crossover coupling I have good synthesis engine.
I contact with wavecon, but it's email can't run.
good lucky.
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g86
Joined: 21 Jan 2003
Posts: 208
Helped: 4
Location: On top of antenna :))
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| 11 Mar 2003 12:06 |
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Which synthesis engine you are refering?
regards
| jamez wrote: |
Hi,
I really simulate a filter by hfss,and it really run good.
But for crossover coupling I have good synthesis engine.
I contact with wavecon, but it's email can't run.
good lucky. |
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jamez
Joined: 15 Jan 2002
Posts: 57
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| 11 Mar 2003 12:21 |
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| synthesis engine for me is elliptic
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