表面波定向耦合器是用来引导表面波的一种器件。它与其它表面波器件相同之处就是利用叉指换能器激励和检测表面波,而且采用相同的制作工艺。它们都具有结构简单、容易制作、重复性好和可靠性高的优点。然而,表面波定向耦合器有其独特的优点和用途,例如:最近出现的多带耦合器具有宽带宽,能量转换 Surface wave directional couplers are a device used to guide surface waves. It is the same with other surface wave devices is the use of interdigital transducer excitation and detection of surface waves, and the use of the same production process. They all have the advantages of simple structure, easy to make, good repeatability and high reliability. However, surface-wave directional couplers have their unique advantages and uses, such as: the recent emergence of multi-band couplers with wide bandwidth, energy conversion