Surface-mounted chip dielectric ceramic antenna for PCS phone

In the telecommunication market smaller and lighter devices are preferred in order to miniaturize devices such as antennas, filters and duplexers, multi-layered microwave devices. The realization of these devices may be accomplished by integration of electromagnetic wave analysis technology and the manufacturing technology of dielectric materials. Furthermore, low-fire microwave ceramics which can be co-fired with good conductors such as silver metal, are needed. The microwave dielectric properties of ZnNb/sub 2/O/sub 6/ and Pb/sub 5/Nb/sub 4/O/sub 15/ (ZNPN ceramics) with additives (CuV/sub 2/O/sub 6/, Sb/sub 2/O/sub 3/ and glass) was investigated. A chip antenna (7.5 mm/spl times/4.5 mm/spl times/0.8 mm) using a multilayered process was designed (1.91 GHz for PCS) and manufactured.