The novel acoustic transversal topology has demonstrated to be a potential candidate for the development of the next generation of communication filters. The major asset of this topology is its capacity to achieve any filter response without the detriment of limited electro-acoustic coupling. Additionally, this topology prompts for an easy connection of different filters to create multiband and multiplexing responses. This study recalls and further details on the design of multiplexers based on transversal topology using bulk acoustic wave (BAW) or surface acoustic wave (SAW) resonators. An important practical aspect of this topology is the need of a BALUN stage at one port of the filter.

The use of the transversal topology is then applied to another type of acoustic resonator configuration, coupled resonator filter (CRF). Such a resonator configuration offers control over the phase of each transversal path, allowing us to eliminate the BALUN stage. CRF resonators are modeled by means of a different circuit model than BAW or SAW, which calls for a new synthesis procedure. This paper describes the synthesis approach and circuit transformation for the development of multiplexers based on the transversal arrangement of the CRF resonators. An example of a fully simulated 9-plexer is provided to verify this procedure.

新型声学横向拓扑已被证明是开发下一代通信滤波器的潜在候选者。这种拓扑结构的主要优点是它能够在不损害有限电声耦合的情况下实现任何滤波器响应。此外，这种拓扑结构有助于轻松连接不同的滤波器，以创建多频带和多路复用响应。本研究回顾并进一步详细介绍了基于使用体声波 (BAW) 或表面声波 (SAW) 谐振器的横向拓扑结构的多路复用器设计。这种拓扑结构的一个重要实际方面是在滤波器的一个端口需要一个 BALUN 级。

然后将横向拓扑的使用应用于另一种类型的声学谐振器配置，即耦合谐振器滤波器 (CRF)。这种谐振器配置可以控制每个横向路径的相位，从而使我们能够消除 BALUN 级。CRF 谐振器通过不同于 BAW 或 SAW 的电路模型建模，这需要新的合成程序。本文描述了基于 CRF 谐振器横向排列的多路复用器开发的综合方法和电路转换。提供了一个完全模拟的 9 路复用器示例来验证此过程。