Patent ID: 6222430
Filing Date: 2001-04-24
Classification: H01P

Abstract:
A dielectric filter comprising:a first dielectric layer containing at least a pair of strip-line resonators to be electro-magnetically coupled to each;second and third dielectric layers disposed in an opposed relation to each other, wherein the first dielectric layer is sandwiched between the second and third dielectric layers, the second and third dielectric layers having substantially same dielectric constant (K1), each of the second and third dielectric layers containing at least one shield electrode; andfourth and fifth dielectric layers having substantially similar dielectric constant (K2) and being interposed between the first and second dielectric layers and between the first and third dielectric layers, respectively;wherein the dielectric constant (K2) of said fourth and fifth dielectric layers is selected to be less than any one of the dielectric constant (K1) of said second and third dielectric layers and a dielectric constant (K3) of said first dielectric layer.