Patent ID: 8081117
Filing Date: 2011-12-20
Classification: H01Q

Abstract:
1. An antenna device comprising: a first antenna element formed on a surface of a substrate, said first antenna element transmitting waves of a frequency; a second antenna element formed on the surface of said substrate, said second antenna element receiving waves of the frequency; an input signal line connected to the first antenna element; an output signal line connected to the second antenna element; a ground conductor formed on a rear surface of said substrate; and a photonic crystal structure formed between said first antenna element and said second antenna element, wherein said photonic crystal structure is made of a plurality of throughholes arranged in said substrate, a substance of said substrate, and a substance different from the substance of said substrate, the substance different from the substance of said substrate is formed in said plurality of throughholes, said photonic crystal structure has a photonic band gap corresponding to the frequency, and said photonic crystal structure blocks the waves of the frequency transmitted by said first antenna element and the waves of the frequency received by said second antenna element.