MULTI-BAND BUILT IN ANTENNA FORMED OF CERAMIC MATERIAL

摘要

An internal patch antenna having sufficiently wide bandwidth and being small in its size enough to be installed in a portable phone by surface mounting technology. The internal patch antenna is installed in a portable terminal to transmit and receive wireless signals, and includes a substrate (60), a dielectric layer (30), a ground plane (70), and a feeding microstrip transmission line (60). The dielectric layer (30) is formed on the substrate (60) and made of ceramic material having high dielectric constant. A conductive layer (20) comprising of multiple radiator patterns (22) through (28) for transceiving signals are formed on the dielectric layer (30). The ground plane (70) are disposed beneath the substrate (60). The feeding microstrip (60) is inserted between the substrate (60) and the dielectric layer (30) to feed electrical signals to the radiator patterns (22) through (28) by electromagnetic coupling. The feeding microstrip (60) preferably runs through the center position between the substrate (60) and the dielectric layer (30). The radiator patterns may be arranged asymmetrically between the region above the feeding microstrip (60) and the other regions.