*especial microstrip LowPass FILTER, plz help*

[mamali]

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

 

[AL0117]

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

 

[mamali]

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