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Waveguide coupling of SAW resonators with different properties

机译:具有不同特性的声表面波谐振器的波导耦合

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摘要

In contrast to conventional transversely coupled resonator filters, waveguide coupling of two one-port resonators with different resonance frequencies is described. The different resonance frequencies are implemented by different central finger gaps or gratings differing by a scaling factor. Consequently, the equivalent fingers and reflecting strips of different resonators are shifted with respect to each other, and the waveguide modes are, therefore, no longer independent of each other. This effect is called mutual coupling of waveguide modes and requires a new type of modeling. The main characteristics of the new modeling method are described. The advantage of the design principle consists of a wider bandwidth without changing the waveguide parameters and different input and output impedance.
机译:与常规的横向耦合谐振器滤波器相反,描述了具有不同谐振频率的两个单端口谐振器的波导耦合。不同的谐振频率由不同的中心指隙或光栅按比例系数实现。因此,不同谐振器的等效指和反射带相对于彼此移动,因此,波导模式不再彼此独立。这种效应称为波导模式的相互耦合,需要一种新型的建模。描述了新建模方法的主要特征。设计原理的优点在于带宽更宽,而无需更改波导参数以及不同的输入和输出阻抗。

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