Patent ID: 7142822
Filing Date: 2006-11-28
Classification: H01L,H01P,H01Q,H04B

Abstract:
1. A package for accommodating a radio frequency circuit, the package comprising: a photonic band gap material formed in two dimensions on a formation surface with at least a part of a surface of a formation wall inside said package acting as said formation surface; wherein said formation wall is at least a part of a plurality of walls constituting the package; said photonic band gap material has a band gap for blocking a surface current in a predetermined frequency band; said radio frequency circuit has an operating frequency falling within the frequency band of said band gap; said formation wall is made of a metal plate; said photonic band gap material is formed on said formation surface of said metal plate; and said photonic band gap material formed on said formation surface is made of a high impedance plate including: a dielectric sheet of predetermined thickness, a conductor sheet formed on a backside of said dielectric sheet, a plurality of identically-shaped metal patches arranged in two dimensions on a surface of said dielectric sheet with their ends at equal intervals from each other, and a plurality of connecting members for electrically connecting said conductor sheet and said metal plate, wherein said metal patches lying on a surface of said high impedance plate face said radio frequency circuit.