what structure to develop a low IL chip filter!

[xbtxbt]

I find the spec of chip filter in big company is very rigorous.But I find chip filter on IEEE paper is usually poor.For example,by LTCC technology，on IEEE paper, the insertion loss is usually up to about 3 db,but by some companys' introduction,the value of their productions is usually about 1db。How can they do this? some new structures?some new materials?

 

[frannk]

Are the size of the filters the same? Are the bandwidth the same? Bigger size usually means less loss and wider bandwidth also suggests lower loss.

 

[xbtxbt]

I find the spec of chip filter in big company is very rigorous.But I find chip filter on IEEE paper is usually poor.For example,by LTCC technology，on IEEE paper, the insertion loss is usually up to about 3 db,but by some companys' introduction,the value of their productions is usually about 1db。How can they do this? some new structures?some new materials?

for example: the size of 2mm×1.2mm×1mm with a IL of 0.6dB,the material is LTCC,the εr is about 20.