Communication device and filter

The invention discloses a communication device and a filter. The filter comprises a shell, a first filtering branch and a second filtering branch; the shell has a first direction and a second direction which are perpendicular to each other; the first filtering branch is arranged on the shell and is composed of nine filtering cavities which are coupled in sequence, and the nine filtering cavities further form four capacitive cross coupling zero points; the second filtering branch is arranged on the shell and is composed of nine filtering cavities which are coupled in sequence, and the nine filtering cavities further form four capacitive cross coupling zero points; and the structure of the first filtering branch is the same as that of the second filtering branch. Through the above mode, the product complexity can be reduced, and the production cost of the filter can be reduced. 本申请公开了一种通信设备及滤波器。该滤波器包括：壳体、第一滤波支路和第二滤波支路；壳体具有相互垂直的第一方向和第二方向；第一滤波支路设置在所述壳体上，由依次耦合的九个滤波腔组成，所述九个滤波腔进一步形成四个容性交叉耦合零点；第二滤波支路设置在所述壳体上，由依次耦合的九个