Dual-band strip antenna supporting left-hand and right-hand circular polarization

摘要

A dual-band strip antenna supporting left-hand circular polarization and right-hand circular polarization includes at least a first base and a second base stacked to each other, an antenna conductor coated between the two bases, and a feeder connected to the antenna conductor through indirect capacitor coupling. The antenna conductor includes a bottom metal layer coated on the bottom of the first base through pattern defining and functioned as a bottom ground conductor; a second metal layer coated on a surface of the first base through pattern defining, the second metal layer functioned as low-frequency band antenna and a bottom ground electrode of the second base; a top metal layer coated on a surface of the second base through pattern defining, the top metal layer functioned as high-frequency band antenna. The dual-band strip antenna of the present invention overcomes the problem of necessity of switch, low efficient and high cost.