Abstract: A modular audio-visual device comprises of a first or a second supporting element connected to a traffic means for supporting other elements, an audio-visual device sustaining element, a display device sustaining element, and a plurality of sets of fixing elements for fixing supporting element and sustaining element. The characteristic of the present invention is that the component elements can be assembled into a module for diversified use or kept alone for simple use. The device according to the present invention can be used in various traffic means. The user can freely choose and buy component elements to assemble into a device with only display function, or with only audio-visual function, or with both display and audio-visual functions. The present invention has the advantages of diversified selection and convenience for user.

Abstract: A film bulk acoustic device having integrated trimmable device comprises a FBAR and a integrated tunable and trimmable device being integrated on a common substrate, at least a common electrode or piezoelectric layer. By trimming the integrated trimmable device or the FBAR and alter either the capacitance or inductance of the integrated trimmable device until the film bulk acoustic device having integrated trimmable device achieves the target resonance frequency. By taking advantage of the electrostatic force, the integrated tunable device is capable of providing tuning until the film bulk acoustic device having integrated tunable device achieves the target resonance frequency.

Abstract: A multi-frequency printed antenna includes an insulating substrate, a feed strip, a ground strip, and a plurality of radiating and grounded conductive strips. The insulating substrate has a first surface and a second surface opposite to the first surface. The feed strip and the plurality of radiating conductive strips are formed on the first surface while the ground strip and the plurality of grounded conductive strips are formed on the second surface. The radiating conductive strips together with the grounded conductive strips form a multi-resonant mechanism to achieve a multi-frequency antenna radiation.