A multi-band radio communication device with an antenna system that includes an antenna element and a parasitic element located in proximity to the antenna element. Excitation electrodes are formed on both main surface of the crystal blank, respectively. A piezoelectric device is provided. The field coils are assembled with stator core pieces, such as pole pieces and return path pieces, into the stator. By this, the apparatus composing members such as electrodes can be prevented from being adhered with a film.