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Notch Filter Design

 
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aryajur



Joined: 23 Oct 2004
Posts: 675
Helped: 69
Location: Sunnyvale, USA
Post04 Dec 2004 0:20   Notch Filter Design
Hello,
I need a notch filter topology to give me a notch at 2.2 GHz. The notch should be of as low order as possible preferably 2. Also, I need to realise this with Inductors with a maximum quality factor of 6. Any suggestions would help.
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batdin



Joined: 03 Jun 2004
Posts: 181
Helped: 3
Location: Bulgaria
Post04 Dec 2004 11:05   Re: Notch Filter Design
I wouldn't use inductors at 2.2GHz.I would use microstrip filter instead (very simple).
By the way,you mentioned nothing about the desired attenuation and bandwidth.
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aryajur



Joined: 23 Oct 2004
Posts: 675
Helped: 69
Location: Sunnyvale, USA
Post04 Dec 2004 11:39   Re: Notch Filter Design
The Bandwidth of the notch is 220MHz. Also the attenuation should be -40dB below the zero frequency value at the notch frequency
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hitmo



Joined: 04 Jan 2005
Posts: 38
Post04 Jan 2005 17:18   Re: Notch Filter Design
aryajur wrote:
The Bandwidth of the notch is 220MHz. Also the attenuation should be -40dB below the zero frequency value at the notch frequency



Hi

for that wide BW n attenuation u can easily realize it with 3 or 5 section quaterwave coupled microstrip section.
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hitmo



Joined: 04 Jan 2005
Posts: 38
Post05 Jan 2005 17:51   Re: Notch Filter Design
hi

see if this helps. this is a quaterwave coupled 5 section notch filter on a rogers6006 20mil 1/2 oz cu. i optimized the circuit using designer and modeled it on hfss.

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