Grating-mode-type wide-band SAW resonators for VCOs
Grating-mode-type wide-band SAW resonators for VCOs
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用于 VCO 的光栅模式型宽带 SAW 谐振器
DOI：
10.1109/ultsym.1998.762110
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
A. Sumioka
中科院分区：
文献类型：
--
作者：
A. Isobe;M. Hikita;K. Asai;A. Sumioka
发现了特别适合于宽带声表面波谐振器的光栅模型声表面波，其带宽大于13%。当铝光栅的厚度根据基片的切割角度进行优化时，它们的瑞利波寄生响应几乎可以忽略不计。例如，对于15/spl °/-旋转的Y切割X传播的双金属锂，Al光栅厚度与SAW波长的比率必须要求在0.125/spl plusmn/0.007内。这些SAW谐振器被应用于UHF波段压控振荡器。它们实现了13.5 MHz/V（3.2%/V）的高控制电压灵敏度和<-115 dBc/Hz的高相位噪声性能，偏离载波25 kHz。
Grating-mode-type surface acoustic waves (SAWs) that are particularly suitable for wide-band SAW resonators were found. Their bandwidths are larger than 13%. Their spurious responses originating from Rayleigh waves are almost negligible when the Al-grating thickness is optimized for the cut angle of substrate. For example, the ratio of the Al-grating thickness to the SAW wavelength must be required within 0.125/spl plusmn/0.007 for 15/spl deg/-rotated Y-cut X-propagating lithium niobate. These SAW resonators were applied to UHF-band voltage-controlled oscillators. They achieved a high control-voltage sensitivity of 13.5 MHz/V (3.2%/V) and a high phase-noise performance of <-115 dBc/Hz offset 25 kHz from the carrier.