Patent ID: 7180473

Claim:
An antenna with a built-in filter comprising: a dielectric multilayer structure having a plurality of dielectric sheets, wherein at least one of the dielectric sheets includes an electroconductive film on a surface of said at least one of the dielectric sheets, the plurality of the dielectric sheets are laminated such that two or more filter blocks are formed to enable transmitting or receiving signals of two or more frequency bands; and a radiation element fixed to the dielectric multilayer structure and connected to said filter blocks, wherein a first filter block of said filter blocks is formed in a combination of any of a low-pass filter, a high-pass filter, and a band elimination filter so as to cut a first signal having a first predetermined frequency band and to pass a second signal having a second predetermined frequency band, a second filter block of said filter blocks is formed in a combination of any of a low-pass filter, a high-pass filter, and a band elimination filter so as to pass said first signal and to cut said second signal, and wherein said first and second signals are different in frequency bands.