Love-type-SAW resonator of small size with very low capacitance ratio and its application to VCO
Love-type-SAW resonator of small size with very low capacitance ratio and its application to VCO
复制标题
小尺寸极低容比Love型声表面波谐振器及其在VCO中的应用
DOI：
10.1109/ultsym.1990.171334
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
T. Kanda
中科院分区：
文献类型：
--
作者：
H. Shimizu;Y. Suzuki;T. Kanda
研制了一种在旋转Y切LiNbO/sub 3/衬底上由金电极叉指换能器构成的Love型声表面波谐振器。这种谐振器可以做得非常小，带宽非常宽。通过对叉指换能器的菱形加权、电极厚度和衬底旋转切割角的正确选择，在不降低谐振Q值的情况下，同时抑制了纵模、横模和Rayleigh SAW引起的谐振器寄生响应。将该谐振器应用于压控振荡器（VCO）电路中，研制出一种超宽带低功耗VCO。<<ETX>>
A Love-type SAW (surface acoustic wave) resonator comprising an Au-electrode IDT (interdigital transducer) on a rotated Y-cut LiNbO/sub 3/ substrate has been developed. This resonator can be made very small in size and extremely broad in bandwidth. Spurious responses of the resonator resulting from longitudinal and transverse modes and the Rayleigh SAW were suppressed simultaneously without resonance Q degradation by the modified rhombus weighting of the IDT, and by the correct choice of the electrode thickness and rotation cut angle of the substrate. Applying the resonator to a voltage controlled oscillator (VCO) circuit, a VCO with an exceedingly broad bandwidth and low power consumption was developed.<<ETX>>