The diplexer separates the GPS from the Bluetooth signal, a necessary step when using only a single antenna for both applications.

同向双工器将GPS信号与蓝牙信号分离，这也是两个应用使用单一天线时的必要步骤。

The attenuation poles will improve the selectivity of the diplexer and can be obtained by modifying the traditional Chebyshev frequency response.

利用柴比雪夫多项式具传输零点的特性，可以提高双工器对频率的选择能力。

First, we formulate the objective function for the use of diplexer optimization, and calculate the gradient of the objective function with respect to the element parameters.

首先，建立优化双工器的目标函数，推导出目标函数对元件参数的梯度。