The invention discloses a SAWR structure with a
transverse mode suppression effect. By virtue of a
surface acoustic wave resonator utilizing the structure, a
transverse mode of the SAWR can be effectively suppressed through the
optimal design of structural parameters, so that very high quality factor is realized. A
resonator structure for the high-
performance surface acoustic wave filter comprisesa piezoelectric monocrystal substrate, an interdigital
electrode IDT, a reflecting
grating, a
busbar and a Si-base perfect matching layer, wherein the interdigital
electrode IDT mainly contains an Alor Cu
metal material, and the
busbar mainly contains the Al or Cu
metal material; the standard thickness h of the IDT and a reflecting
grating electrode is more than or equal to 0.02
lambda and less than or equal to 0.2
lambda; and the value range of an aperture w is more than or equal to 20
lambda and less than or equal to 50lambda, the value range of a false point length l is more than or equal to2lambda and less than or equal to 10lambda, the value range of an aperture gap g is more than or equal to 0.2lambda and less than or equal to 0.5lambda, the value range of a metallization ratio r ismore than or equal to 0.4lambda and less than or equal to 0.8lambda, and lambda is a resonant
wavelength. According to the SAWR structure provided by the invention, by adding a false point and adjusting the length of the false point, the
transverse mode interference of the SAWR can be effectively suppressed.