Patent ID: 8654028
Filing Date: 2014-02-18
Classification: H01Q,H05K

Abstract:
1. An electromagnetic wave filter apparatus for blocking electromagnetic waves with frequencies lower than a predetermined frequency, the electromagnetic wave filter apparatus comprising: a ground conductor disposed at a part of a shield conductor which is provided so as to enclose an antenna element; a first aperture provided in the ground conductor; a plurality of strip conductors, each of which is connected to the ground conductor at both ends thereof, and which divide the first aperture into a plurality of second apertures which are disposed so as to be open in a radiation direction of the antenna element; and a plurality of bandstop filters provided at intervals on each of the strip conductors such that each of the bandstop filters prevents a current with the predetermined frequency from flowing through a corresponding strip conductor due to an electromagnetic wave with the predetermined frequency traveling through the second apertures of the electromagnetic wave filter apparatus, whereby the electromagnetic wave filter apparatus passes the electromagnetic wave with the predetermined frequency without exerting substantial influence on radiation of the electromagnetic wave with the predetermined frequency.