Two-dimensional piezoelectric photonic crystal radio frequency acoustic wave guide
A seed crystal and acoustic waveguide technology, which is applied in the field of two-dimensional piezoelectric phononic crystal radio frequency acoustic waveguide, can solve the problems that the acoustic waveguide function cannot be realized, and achieve the effect of effective reflection and efficient transmission of energy
Active Publication Date: 2014-01-29
GUANGDONG CANCHIP TECH CO LTD
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The surface acoustic wave resonator can be applied to the radio frequency section, but it only uses the dot matrix to complete the limiting function of the surface acoustic wave energy in the x direction and the y direction, so as to realize the performance of the resonator, and cannot realize the function of the acoustic waveguide
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[0018] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
[0019] Such as figure 2 As shown, it is a schematic diagram of the structure of a two-dimensional piezoelectric phononic crystal radio frequency acoustic waveguide according to an embodiment of the present invention.
[0020] The two-dimensional piezoelectric phononic crystal radio frequency acoustic waveguide includes a two-dimensional metal lattice 1 and a piezoelectric substrate 2 . The two-dimensional metal lattice 1 is arranged on the piezoelectric substrate 2 in the form that the lattice constant in the y direction is 1.5 to 4.5 times that in the x direction. Among them, the two-dimensional metal lattice can be made of metal materials such as aluminum, copper, tungsten or gold, and its cross-sectional shape is circular, square, elliptical or rectangular.
[0021] The passband frequency f in the x direction of ...
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The invention relates to a two-dimensional piezoelectric photonic crystal radio frequency acoustic wave guide which comprises a two-dimensional metal dot matrix disposed on the piezoelectric substrate. The lattice constant in the y direction of the two-dimensional metal dot matrix is in proportion to the lattice constant in the x direction to allow the pass band in the x direction to correspond to the stop band in the y direction, specifically the lattice constant in the y direction of the two-dimensional metal dot matrix is 1.5-4.5 times of the lattice constant in the x direction. By the two-dimensional piezoelectric photonic crystal radio frequency acoustic wave guide, acoustic surface waves of radio frequency bands can be transmitted efficiently in the x direction of the piezoelectric photonic crystal, energy effective reflection in the y direction can be achieved, and the radio frequency band sound wave guide function can be achieved.
Description
technical field [0001] The invention relates to the field of piezoelectric devices, in particular to a two-dimensional piezoelectric phonon crystal radio frequency acoustic waveguide. Background technique [0002] Currently, conventional two-dimensional symmetric phononic crystals, with equal lattice constants in the x and y directions, can be used to improve the performance of resonators, such as figure 1 shown. Since the band gap distribution in the x direction and the y direction obtained by the two-dimensional symmetric phononic crystal is consistent, the sound wave in the band gap realizes total energy reflection in the x direction and the y direction. Therefore, the phononic crystal structure acts as a reflective grid to prevent energy leakage and obtain high-Q resonator performance. [0003] In the existing patent CN200410077471.9 utility model patent "two-dimensional phononic crystal sound insulation structure" and CN200420102759.2 utility model patent "two-dimensi...
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IPC IPC(8): H03H9/25
Inventor 李红浪柯亚兵程利娜何世堂
Owner GUANGDONG CANCHIP TECH CO LTD