*especial microstrip LowPass FILTER, plz help*

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mamali

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dear all rf buddies,
i need an especial microstrip LP filter,
substrate parameters: er=2.53, h=1.53mm (fixed, could not be changed)
passband edge:2.2GHz; stopband edge:3.2GHz; stopband center freq.:3.7GHz; minimum atenuation:20dB or more!.
and the space limitation that i have, which make this filter a little especial:
it should be limited to a 4mmx3mm space on the substrate.

any active, monolitice, or any other kinds of filter, satisfying the above cnditions is welcome. your kind helps is appriciated.

rgrds, marti
 

Hi Marti,

for such a small footprint you can count on some LTCC filters. Take a look at Minicircuits LFCN-2000 or LFCN-2250. The footprint is 1206

hxxp://www.minicircuits.com/dg03-197A.pdf

regds, Al
 

dear al,
the filter u segested is so cool, tnx, but some points:
1. the filter is still big! .06"x.12", i think i nedd something about .09"x.09", but thats cool.
2. how should i model it on 1E3D? i wanna put it on a p@tch antenna.
3. do you know some other filter designs? its educational, not practical, thus, any kind of filters is acceptable, as i mentioned befor

rgrds, marti
 

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