Patent ID: 7741915
Filing Date: 2010-06-22
Classification: H03F

Abstract:
1. A power amplification apparatus in a communication system, the apparatus comprising: a ground plane for removing a noise frequency component; and a high power amplifier connected to the ground plane, wherein the ground plane has a parallel structure of alternately arranged first and second lattice structures, the first lattice structure comprising a plurality of first etched portions serially repeated on a copperplate at an interval of a first period, and the second lattice structure comprising a plurality of second etched portions serially repeated on the copperplate at an interval of a second period, and wherein the first period is representing an interval of the noise frequency component generated from the high power amplifier, with λ 0 representing a wavelength of an electric field in free space defined by in which λ represents a wavelength of a frequency, and “er” represents a dielectric constant of a substrate.