Abstract: A piezoelectric power generator can be used regardless of the size of the parts, and can position the mass center of a mass at the center by disposing the free ends of cantilevers opposite each other when connecting a plurality of cantilevers in series. The piezoelectric power generator is a morph structure cantilever piezoelectric power generator having at least two cantilevers disposed with their free ends opposite to each other, and a mass that is one body provided for bending of the cantilevers.

Abstract: A bandpass filter (BPF) configured in 3-D structures for filtering signals of ultra wide bands is disclosed, the BPF comprising sequentially stacked first to fourth dielectric substrates, wherein the first dielectric substrate is formed at a bottom surface thereof with a first ground pattern, the second dielectric substrate is formed at an upper surface thereof with a second ground pattern, and a stripline pattern is formed between the first and second dielectric substrates. The fourth dielectric substrate is formed thereon with a filter pattern and input/output coupled line patterns.

Abstract: A bandpass filter (BPF) configured in 3-D structures for filtering signals of ultra wide bands is disclosed, the BPF comprising sequentially stacked first to fourth dielectric substrates, wherein the first dielectric substrate is formed at a bottom surface thereof with a first ground pattern, the second dielectric substrate is formed at an upper surface thereof with a second ground pattern, and a stripline pattern is formed between the first and second dielectric substrates. The fourth dielectric substrate is formed thereon with a filter pattern and input/output coupled line patterns.